:root {
  color-scheme: light;
  --canvas: #f3f5f4;
  --surface: #ffffff;
  --surface-subtle: #f8faf9;
  --surface-muted: #edf2f0;
  --text: #18211f;
  --text-secondary: #46534f;
  --text-muted: #6f7e79;
  --border: #d8e0dd;
  --border-strong: #b8c5c1;
  --accent: #0f766e;
  --accent-hover: #0b5e58;
  --accent-soft: #dceeea;
  --accent-ink: #084d48;
  --danger: #a33b50;
  --danger-soft: #faeef1;
  --success: #24724f;
  --warning: #89641f;
  --focus: #55b8ae;
  --shadow-dialog: 0 24px 70px rgba(18, 35, 31, 0.18);
  --font-sans: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --font-reading: ui-serif, Georgia, Cambria, "Times New Roman", serif;
  --radius-sm: 4px;
  --radius-md: 6px;
  --radius-lg: 10px;
  --radius-control: 4px;
  --radius-card: 6px;
  --radius-dialog: 10px;
  --on-accent: #ffffff;
  --muted: var(--text-secondary);
  --focus-ring: color-mix(in srgb, var(--focus) 48%, transparent);
  --badge-a: var(--accent);
  --badge-b: #24724f;
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 24px;
  --space-6: 32px;
  --space-7: 48px;
  --reading-width: 72ch;
  --form-width: 640px;
  --content: 1180px;
  --topbar-height: 96px;
}

:root[data-theme="dark"] {
  color-scheme: dark;
  --canvas: #0d1211;
  --surface: #131a18;
  --surface-subtle: #171f1d;
  --surface-muted: #1c2724;
  --text: #edf3f1;
  --text-secondary: #bdc9c5;
  --text-muted: #899a94;
  --border: #2b3935;
  --border-strong: #43534e;
  --accent: #48bfb3;
  --accent-hover: #70d0c6;
  --accent-soft: #183631;
  --accent-ink: #9be3da;
  --danger: #ef8ca0;
  --danger-soft: #321c22;
  --success: #78cfa5;
  --warning: #e1bb70;
  --focus: #67c9bf;
  --shadow-dialog: 0 28px 80px rgba(0, 0, 0, 0.5);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  text-size-adjust: 100%;
}

body {
  min-width: 320px;
  min-height: 100vh;
  margin: 0;
  background: var(--canvas);
  color: var(--text);
  font-family: var(--font-sans);
  font-size: 15px;
  line-height: 1.5;
}

body.modal-open {
  overflow: hidden;
}

.skip-link {
  position: fixed;
  top: 8px;
  left: 8px;
  z-index: 200;
  padding: 9px 12px;
  border: 2px solid var(--accent);
  background: var(--surface);
  color: var(--text);
  transform: translateY(-150%);
}

.skip-link:focus {
  transform: translateY(0);
}

[hidden] {
  display: none !important;
}

button,
input,
select,
textarea {
  color: inherit;
  font: inherit;
}

button {
  cursor: pointer;
}

button:disabled {
  cursor: not-allowed;
  opacity: 0.52;
}

a {
  color: inherit;
}

p,
h1,
h2,
h3,
h4,
ul,
ol,
dl,
dd {
  margin-top: 0;
}

h1,
h2,
h3,
h4,
strong {
  overflow-wrap: anywhere;
}

h1,
h2,
h3,
h4 {
  color: var(--text);
  font-weight: 720;
  letter-spacing: 0;
  line-height: 1.12;
}

.eyebrow,
.panel-kicker,
.section-title,
label,
.summary-box > span,
.plan-kicker {
  color: var(--text-muted);
  font-size: 0.69rem;
  font-weight: 760;
  letter-spacing: 0.085em;
  line-height: 1.3;
  text-transform: uppercase;
}

.eyebrow,
.panel-kicker,
.section-title,
.summary-box > span,
.plan-kicker {
  margin: 0 0 8px;
}

.section-title {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

button,
.google-button {
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-sm);
  background: var(--surface);
  color: var(--text-secondary);
  font-weight: 650;
  text-decoration: none;
  transition: background-color 140ms ease, border-color 140ms ease, color 140ms ease, transform 140ms ease;
}

button:hover:not(:disabled),
.google-button:hover {
  border-color: var(--accent);
  color: var(--accent-ink);
}

button:active:not(:disabled) {
  transform: translateY(1px);
}

:where(button, a, input, select, textarea, [contenteditable="true"]):focus-visible {
  outline: 3px solid color-mix(in srgb, var(--focus) 44%, transparent);
  outline-offset: 2px;
}

input,
select,
textarea {
  width: 100%;
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-sm);
  outline: 0;
  background: var(--surface);
}

input,
select {
  min-height: 40px;
  padding: 8px 10px;
}

textarea {
  min-height: 260px;
  padding: 16px;
  line-height: 1.65;
  resize: vertical;
}

input:focus,
select:focus,
textarea:focus,
[contenteditable="true"]:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--focus) 24%, transparent);
}

input[aria-invalid="true"],
textarea[aria-invalid="true"] {
  border-color: var(--danger);
}

.primary-button,
.primary-account-button,
.revision-primary-action,
.contact-submit-button,
.plan-button:not(.subtle),
.icon-button,
.revision-action-primary {
  border-color: var(--accent);
  background: var(--accent);
  color: #fff;
}

.primary-button:hover:not(:disabled),
.primary-account-button:hover:not(:disabled),
.revision-primary-action:hover:not(:disabled),
.contact-submit-button:hover:not(:disabled),
.plan-button:hover:not(:disabled),
.icon-button:hover:not(:disabled),
.revision-action-primary:hover:not(:disabled) {
  border-color: var(--accent-hover);
  background: var(--accent-hover);
  color: #fff;
}

.status-message {
  margin: 8px 0 0;
  color: var(--text-muted);
  font-size: 0.82rem;
  line-height: 1.45;
}

.status-message.error,
.field-message.error {
  color: var(--danger);
}

.status-message.success {
  color: var(--success);
}

.field-message {
  margin: -3px 0 2px;
  color: var(--text-muted);
  font-size: 0.76rem;
}

.field-message.warning {
  color: var(--warning);
}

/* Brand and loading */
.brand-mark {
  display: inline-grid;
  width: 34px;
  height: 34px;
  flex: 0 0 auto;
  place-items: center;
  border: 1px solid var(--accent);
  border-radius: var(--radius-sm);
  background: var(--accent);
  color: #fff;
  font-size: 0.72rem;
  font-weight: 820;
  letter-spacing: 0.08em;
}

.topbar-product,
.brand-lockup,
.launch-product {
  display: flex;
  align-items: center;
  gap: 10px;
}

.topbar-product strong,
.launch-product strong,
.brand-lockup strong {
  display: block;
  margin: 0;
  font-size: 1rem;
  letter-spacing: 0;
}

.topbar-product span:not(.brand-mark),
.launch-product span:not(.brand-mark),
.product-signature {
  display: block;
  margin-top: 1px;
  color: var(--text-muted);
  font-size: 0.7rem;
  font-weight: 580;
  letter-spacing: 0;
}

.launch-overlay {
  position: fixed;
  inset: 0;
  z-index: 100;
  display: grid;
  place-items: center;
  background: color-mix(in srgb, var(--surface) 94%, transparent);
  backdrop-filter: blur(3px);
  transition: opacity 300ms ease, visibility 300ms ease;
}

.launch-overlay.hidden {
  visibility: hidden;
  opacity: 0;
}

.launch-product {
  padding: 18px 22px;
  border: 1px solid var(--border);
  background: var(--surface);
  animation: launch-in 520ms cubic-bezier(.2,.8,.2,1) both;
}

@keyframes launch-in {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

/* Public product page */
.landing-page {
  min-height: 100vh;
  background: var(--surface);
}

.landing-nav,
.landing-hero,
.landing-workflow,
.landing-benefits-grid,
.landing-schools,
.landing-pricing-preview,
.landing-trust-faq {
  width: min(var(--content), calc(100% - 48px));
  margin-inline: auto;
}

.landing-nav {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  min-height: 68px;
  align-items: center;
  gap: 24px;
  border-bottom: 1px solid var(--border);
}

.landing-primary-links,
.landing-nav-actions,
.landing-hero-actions {
  display: flex;
  align-items: center;
  gap: 4px;
}

.landing-primary-links {
  justify-content: center;
}

.landing-nav-actions,
.landing-hero-actions {
  gap: 8px;
}

.landing-primary-links button,
.landing-nav-actions button,
.landing-hero-actions button {
  min-height: 36px;
  padding: 7px 10px;
  border-color: transparent;
  background: transparent;
  font-size: 0.82rem;
}

.landing-nav-actions button,
.landing-hero-actions button {
  border-color: var(--border-strong);
  background: var(--surface);
}

.landing-nav-actions .primary-account-button,
.landing-hero-actions .primary-account-button {
  border-color: var(--accent);
  background: var(--accent);
  color: #fff;
}

.landing-hero {
  display: grid;
  grid-template-columns: minmax(0, 1.45fr) minmax(300px, 0.72fr);
  gap: clamp(48px, 7vw, 96px);
  align-items: center;
  min-height: 540px;
  padding-block: 72px;
}

.landing-hero h1 {
  max-width: 820px;
  margin: 0;
  font-size: clamp(2.65rem, 5vw, 4.8rem);
  font-weight: 740;
  letter-spacing: 0;
  line-height: 0.99;
}

.landing-hero > div > p:not(.eyebrow) {
  max-width: 660px;
  margin: 22px 0 0;
  color: var(--text-secondary);
  font-size: 1.06rem;
  line-height: 1.65;
}

.landing-hero-actions {
  margin-top: 28px;
}

.landing-demo-card {
  border: 1px solid var(--border-strong);
  border-left: 4px solid var(--accent);
  border-radius: var(--radius-sm);
  background: var(--surface-subtle);
  padding: 24px;
}

.landing-demo-card > span,
.landing-plan-row article > span,
.landing-trust article > span,
.landing-workflow article > span,
.school-readiness-grid article > span {
  color: var(--text-muted);
  font-size: 0.68rem;
  font-weight: 760;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.landing-demo-card > strong {
  display: block;
  margin: 18px 0 10px;
  font-size: 1.4rem;
}

.landing-demo-card p {
  color: var(--text-secondary);
  line-height: 1.55;
}

.landing-demo-card div {
  display: grid;
  gap: 0;
  margin-top: 18px;
  border-top: 1px solid var(--border);
}

.landing-demo-card div span {
  padding: 9px 0;
  border-bottom: 1px solid var(--border);
  color: var(--text-secondary);
  font-size: 0.78rem;
}

.landing-workflow,
.landing-benefits-grid,
.landing-schools,
.landing-pricing-preview,
.landing-trust-faq {
  padding-block: 68px;
  border-top: 1px solid var(--border);
}

.landing-section-head {
  grid-column: 1 / -1;
  max-width: 720px;
  margin-bottom: 24px;
}

.landing-section-head h2,
.landing-schools h2,
.landing-benefits-grid h2 {
  margin: 0;
  font-size: clamp(1.9rem, 3.3vw, 3.2rem);
  line-height: 1.08;
}

.landing-section-head p:not(.eyebrow),
.landing-schools p:not(.eyebrow) {
  margin: 12px 0 0;
  color: var(--text-secondary);
  line-height: 1.6;
}

.landing-workflow {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 28px;
}

.landing-workflow article {
  display: grid;
  grid-template-columns: 30px minmax(0, 1fr);
  align-content: start;
  gap: 8px 12px;
  padding-top: 18px;
  border-top: 2px solid var(--border-strong);
}

.landing-workflow article > span {
  grid-row: 1 / span 2;
  padding-top: 2px;
  color: var(--accent-ink);
  font-size: 1rem;
}

.landing-workflow article strong {
  font-size: 1.04rem;
}

.landing-workflow article p {
  margin: 0;
  color: var(--text-secondary);
  line-height: 1.55;
}

.landing-benefits-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0;
}

.landing-benefits-grid > div {
  padding: 8px 48px 8px 0;
}

.landing-benefits-grid > div + div {
  padding: 8px 0 8px 48px;
  border-left: 1px solid var(--border);
}

.landing-benefits-grid ul {
  display: grid;
  gap: 0;
  margin: 24px 0 0;
  padding: 0;
  border-top: 1px solid var(--border);
  list-style: none;
}

.landing-benefits-grid li {
  padding: 11px 0;
  border-bottom: 1px solid var(--border);
  color: var(--text-secondary);
}

.landing-schools {
  display: grid;
  grid-template-columns: minmax(260px, 0.65fr) minmax(0, 1.35fr);
  gap: 72px;
  align-items: start;
}

.school-readiness-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  border-top: 1px solid var(--border-strong);
}

.school-readiness-grid article {
  min-width: 0;
  padding: 17px 18px 18px 0;
  border-bottom: 1px solid var(--border);
}

.school-readiness-grid article:nth-child(even) {
  padding-left: 18px;
  border-left: 1px solid var(--border);
}

.school-readiness-grid strong {
  display: block;
  margin-top: 6px;
  font-size: 0.96rem;
}

.school-readiness-grid p {
  margin: 7px 0 0;
  color: var(--text-secondary);
  font-size: 0.84rem;
}

.landing-plan-row {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  border: 1px solid var(--border-strong);
}

.landing-pricing-preview .section-title {
  margin-bottom: 16px;
}

.landing-plan-row article {
  min-width: 0;
  min-height: 180px;
  padding: 20px;
  border-right: 1px solid var(--border);
  background: var(--surface);
}

.landing-plan-row article:last-child {
  border-right: 0;
}

.landing-plan-row article.featured-plan {
  border-top: 3px solid var(--accent);
  background: var(--accent-soft);
}

.landing-plan-row article strong {
  display: block;
  margin-top: 18px;
  color: var(--accent-ink);
  font-size: 1.65rem;
  letter-spacing: 0;
}

.landing-plan-row article p {
  margin: 16px 0 0;
  color: var(--text-secondary);
}

.landing-trust-faq {
  display: grid;
  grid-template-columns: minmax(220px, 0.45fr) minmax(0, 1fr);
  gap: 72px;
}

.landing-trust {
  display: grid;
  align-content: start;
}

.landing-trust article {
  padding: 14px 0;
  border-bottom: 1px solid var(--border);
}

.landing-trust article strong {
  display: block;
  margin-top: 4px;
  font-size: 0.9rem;
}

.landing-faq {
  display: grid;
}

.landing-faq > .eyebrow {
  margin-bottom: 6px;
}

.landing-faq details {
  border-top: 1px solid var(--border);
  padding: 15px 0;
}

.landing-faq details:last-child {
  border-bottom: 1px solid var(--border);
}

.landing-faq summary {
  cursor: pointer;
  color: var(--text);
  font-weight: 680;
}

.landing-faq details p {
  max-width: 680px;
  margin: 10px 0 0;
  color: var(--text-secondary);
}

/* Authentication */
.auth-page {
  position: fixed;
  inset: 0;
  z-index: 80;
  display: grid;
  place-items: center;
  padding: 24px;
}

.auth-backdrop,
.pricing-backdrop,
.badge-backdrop,
.achievement-backdrop,
.settings-backdrop,
.legal-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(13, 25, 22, 0.56);
  backdrop-filter: blur(4px);
}

.auth-shell {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) 420px;
  width: min(1080px, 100%);
  max-height: calc(100vh - 48px);
  overflow: auto;
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-md);
  background: var(--surface);
  box-shadow: var(--shadow-dialog);
}

.auth-product-panel {
  display: flex;
  min-height: 620px;
  flex-direction: column;
  padding: 40px;
  border-right: 1px solid var(--border);
  background: var(--surface-subtle);
}

.brand-lockup {
  align-self: flex-start;
}

.auth-product-panel h1 {
  max-width: 620px;
  margin: auto 0 14px;
  font-size: clamp(2.45rem, 5vw, 4.5rem);
  letter-spacing: 0;
  line-height: 0.98;
}

.auth-copy {
  max-width: 580px;
  margin: 0;
  color: var(--text-secondary);
  font-size: 1rem;
  line-height: 1.6;
}

.auth-proof {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0;
  margin: 34px 0 0;
  border-top: 1px solid var(--border);
}

.auth-proof div {
  padding: 14px 16px 0 0;
}

.auth-proof div + div {
  padding-left: 16px;
  border-left: 1px solid var(--border);
}

.auth-proof dt {
  font-weight: 680;
}

.auth-proof dd {
  margin: 5px 0 0;
  color: var(--text-muted);
  font-size: 0.82rem;
}

.auth-card {
  position: relative;
  align-self: center;
  padding: 38px;
}

.auth-card h2 {
  margin: 0 0 20px;
  font-size: 1.55rem;
}

.auth-tabs,
.segmented-control,
.learning-mode-switch {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  border-bottom: 1px solid var(--border-strong);
}

.auth-tabs {
  margin-bottom: 22px;
}

.auth-tabs button,
.segmented-control button,
.learning-mode-switch button {
  min-height: 38px;
  border: 0;
  border-bottom: 2px solid transparent;
  background: transparent;
}

.auth-tabs button.active,
.segmented-control button.active,
.learning-mode-switch button.active {
  border-bottom-color: var(--accent);
  color: var(--accent-ink);
}

.auth-form {
  display: grid;
  gap: 10px;
}

.password-field {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  border: 1px solid var(--border-strong);
  background: var(--surface);
}

.password-field:focus-within {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--focus) 24%, transparent);
}

.password-field input {
  border: 0;
  box-shadow: none;
}

.password-toggle {
  min-width: 60px;
  border: 0;
  border-left: 1px solid var(--border);
  background: var(--surface-subtle);
}

.primary-button,
.google-button {
  display: grid;
  min-height: 42px;
  place-items: center;
  padding: 9px 14px;
}

.primary-button {
  margin-top: 5px;
}

.auth-trust-note {
  margin: 0;
  color: var(--text-muted);
  font-size: 0.76rem;
  text-align: center;
}

.auth-provider-list {
  margin-top: 12px;
}

.google-button {
  border-color: var(--border-strong);
  background: var(--surface);
}

.auth-message {
  min-height: 20px;
}

.modal-close-button {
  position: absolute;
  top: 18px;
  right: 18px;
  display: grid;
  width: 34px;
  height: 34px;
  place-items: center;
  border-color: transparent;
  background: transparent;
  font-size: 1.35rem;
  line-height: 1;
}

/* Application shell and navigation */
.app-shell {
  display: grid;
  grid-template-columns: 244px 294px minmax(0, 1fr);
  grid-template-rows: var(--topbar-height) minmax(0, 1fr);
  grid-template-areas:
    "topbar topbar topbar"
    "sidebar notes editor";
  min-height: calc(100vh - 45px);
  height: calc(100vh - 45px);
  overflow: hidden;
  background: var(--surface);
}

.app-topbar {
  position: relative;
  z-index: 10;
  grid-area: topbar;
  display: grid;
  grid-template-columns: minmax(240px, 1fr) auto minmax(420px, 1fr);
  grid-template-rows: 58px 38px;
  grid-template-areas:
    "context brand utilities"
    ". tabs .";
  align-items: center;
  gap: 0 18px;
  border-top: 2px solid var(--text);
  border-bottom: 1px solid var(--border-strong);
  background: var(--surface);
  padding: 0 20px;
}

.topbar-center {
  grid-area: brand;
  justify-self: center;
}

.topbar-brand-button {
  border: 0;
  background: transparent;
  padding: 3px;
  text-align: left;
}

.topbar-brand-button:hover {
  border-color: transparent;
  color: var(--text);
}

.topbar-context {
  grid-area: context;
  display: flex;
  min-width: 0;
  align-items: center;
  gap: 12px;
}

.topbar-clock {
  display: grid;
  grid-template-columns: auto auto;
  align-items: baseline;
  gap: 8px;
  padding-right: 12px;
  border-right: 1px solid var(--border);
  font-variant-numeric: tabular-nums;
}

.topbar-time {
  color: var(--text);
  font-size: 1.05rem;
  font-weight: 720;
  letter-spacing: 0;
}

.topbar-date {
  color: var(--text-muted);
  font-size: 0.68rem;
  font-weight: 700;
  text-transform: uppercase;
}

.account-status {
  min-width: 0;
  margin: 0;
  overflow: hidden;
  color: var(--text-muted);
  font-size: 0.76rem;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.topbar-utilities {
  grid-area: utilities;
  display: flex;
  min-width: 0;
  align-items: center;
  justify-content: flex-end;
  gap: 5px;
}

.topbar-utility-button,
.secondary-account-button,
.primary-account-button {
  min-height: 34px;
  padding: 6px 9px;
  font-size: 0.76rem;
}

.topbar-utility-button,
.secondary-account-button {
  border-color: transparent;
  background: transparent;
}

.topbar-plan-message {
  max-width: 150px;
  color: var(--danger);
  font-size: 0.68rem;
}

.topbar-plan-message:empty {
  display: none;
}

.account-actions {
  display: flex;
  align-items: center;
  gap: 5px;
}

.account-profile-button {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  max-width: 170px;
  align-items: center;
  gap: 7px;
  border-color: var(--border);
  padding: 3px 7px 3px 4px;
  background: var(--surface-subtle);
  text-align: left;
}

.profile-copy {
  min-width: 0;
}

.profile-copy strong,
.profile-copy small {
  display: block;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.profile-copy strong {
  font-size: 0.74rem;
}

.profile-copy small {
  color: var(--text-muted);
  font-size: 0.65rem;
}

.profile-avatar {
  display: inline-grid;
  place-items: center;
  border: 1px solid var(--border-strong);
  border-radius: 50%;
  background: var(--surface-muted);
  color: var(--accent-ink);
  font-weight: 760;
}

.profile-avatar-small {
  width: 27px;
  height: 27px;
  font-size: 0.62rem;
}

.profile-avatar-large {
  width: 54px;
  height: 54px;
}

.topbar-section-switch {
  grid-area: tabs;
  display: grid;
  grid-template-columns: repeat(5, minmax(88px, 1fr));
  align-self: stretch;
  justify-self: center;
  width: min(540px, 48vw);
}

.topbar-section-switch button {
  min-height: 38px;
  border: 0;
  border-bottom: 3px solid transparent;
  background: transparent;
  color: var(--text-muted);
  font-size: 0.78rem;
}

.topbar-section-switch button.active {
  border-bottom-color: var(--accent);
  color: var(--text);
}

.topbar-section-switch button.locked-section::after {
  content: " · Pro";
  color: var(--text-muted);
  font-size: 0.62rem;
}

.theme-toggle {
  display: grid;
  min-width: 42px;
  min-height: 32px;
  place-items: center;
  border-color: transparent;
  background: transparent;
  padding: 4px;
}

.theme-toggle-track {
  position: relative;
  display: block;
  width: 31px;
  height: 17px;
  border: 1px solid var(--border-strong);
  border-radius: 10px;
  background: var(--surface-muted);
}

.theme-toggle-knob {
  position: absolute;
  top: 2px;
  left: 2px;
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: var(--text-muted);
  transition: transform 180ms ease, background-color 180ms ease;
}

:root[data-theme="dark"] .theme-toggle-knob {
  transform: translateX(14px);
  background: var(--accent);
}

/* Notes navigation */
.sidebar {
  grid-area: sidebar;
  min-width: 0;
  overflow-y: auto;
  border-right: 1px solid var(--border);
  background: var(--surface-subtle);
  scrollbar-width: thin;
}

.sidebar-tools {
  position: sticky;
  top: 0;
  z-index: 2;
  display: flex;
  justify-content: flex-end;
  padding: 12px 14px;
  border-bottom: 1px solid var(--border);
  background: color-mix(in srgb, var(--surface-subtle) 94%, transparent);
  backdrop-filter: blur(5px);
}

.icon-button {
  width: 34px;
  height: 34px;
  padding: 0;
  font-size: 1.2rem;
}

.notes-sidebar-context {
  padding: 0 14px 24px;
}

.notes-sidebar-context > section {
  padding: 16px 0;
  border-bottom: 1px solid var(--border);
}

.workspace-panel {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 10px;
}

.workspace-panel strong,
.workspace-panel span {
  display: block;
}

.workspace-panel strong {
  margin-bottom: 2px;
}

.workspace-panel span:not(.panel-kicker) {
  color: var(--text-muted);
  font-size: 0.74rem;
}

.text-button {
  border-color: transparent;
  background: transparent;
  padding: 4px;
  color: var(--text-muted);
  font-size: 0.72rem;
}

.search-panel label,
.collaboration-panel label {
  display: block;
  margin-bottom: 8px;
}

.search-panel input {
  min-height: 36px;
  background: var(--surface);
}

.workspace-list,
.recent-note-list,
.member-list {
  display: grid;
  gap: 2px;
}

.workspace-button,
.folder-button,
.recent-note-button {
  width: 100%;
  min-width: 0;
  border-color: transparent;
  background: transparent;
  padding: 8px 9px;
  text-align: left;
}

.workspace-button span,
.workspace-button small,
.recent-note-button span,
.recent-note-button small {
  display: block;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.workspace-button small,
.recent-note-button small {
  margin-top: 2px;
  color: var(--text-muted);
  font-size: 0.68rem;
}

.workspace-button.active,
.folder-button.active,
.recent-note-button.active {
  border-color: var(--border);
  background: var(--accent-soft);
  color: var(--accent-ink);
}

.inline-form {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 6px;
  margin-top: 8px;
}

.spaces-panel .inline-form {
  grid-template-columns: minmax(0, 1fr) 86px 34px;
}

.inline-form input,
.inline-form select,
.inline-form button {
  min-height: 34px;
  padding: 6px 8px;
}

.folders .section-title,
.spaces-panel .section-title,
.recent-notes-panel .section-title,
.today-panel .section-title,
.achievement-panel .section-title {
  margin-bottom: 8px;
}

.folder-button {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.folder-count {
  color: var(--text-muted);
  font-variant-numeric: tabular-nums;
}

.today-score {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 8px;
}

.today-score strong {
  font-size: 1.28rem;
  font-variant-numeric: tabular-nums;
}

.today-score span,
.today-panel p,
.achievement-panel p,
.sidebar-settings-panel p {
  color: var(--text-muted);
  font-size: 0.76rem;
}

.today-meter,
.achievement-meter,
.revision-course-meter,
.topic-card-meter,
.mini-meter,
.neat-quiz-meter,
.badge-overview-meter {
  height: 4px;
  overflow: hidden;
  background: var(--surface-muted);
}

.today-meter > span,
.achievement-meter > span,
.revision-course-meter > span,
.topic-card-meter > span,
.mini-meter > i,
.neat-quiz-meter > span,
.badge-overview-meter > span {
  display: block;
  height: 100%;
  background: var(--accent);
  transition: width 240ms ease;
}

.today-panel button,
.badge-collection-button,
.sidebar-settings-panel button {
  width: 100%;
  min-height: 34px;
  padding: 7px 9px;
  font-size: 0.74rem;
}

.achievement-panel p strong,
.achievement-panel p span {
  display: block;
}

.member-list span {
  color: var(--text-secondary);
  font-size: 0.74rem;
}

/* Note list and editor */
.notes-column {
  grid-area: notes;
  min-width: 0;
  overflow: hidden;
  border-right: 1px solid var(--border);
  background: var(--surface);
}

.column-header {
  display: flex;
  min-height: 78px;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 16px 18px;
  border-bottom: 1px solid var(--border);
}

.column-header h2 {
  margin: 0;
  font-size: 1.18rem;
}

.danger-button {
  min-height: 32px;
  border-color: transparent;
  background: transparent;
  color: var(--danger);
  padding: 5px 7px;
  font-size: 0.72rem;
}

.notes-list {
  height: calc(100% - 78px);
  overflow-y: auto;
  scrollbar-width: thin;
}

.note-card {
  display: block;
  width: 100%;
  border: 0;
  border-bottom: 1px solid var(--border);
  border-left: 3px solid transparent;
  border-radius: 0;
  background: transparent;
  padding: 15px 16px 14px;
  text-align: left;
}

.note-card:hover,
.note-card.active {
  border-bottom-color: var(--border);
  background: var(--surface-subtle);
  color: var(--text);
}

.note-card.active {
  border-left-color: var(--accent);
}

.note-card-head {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 8px;
  align-items: center;
}

.note-card h3 {
  margin: 0;
  font-size: 0.95rem;
}

.note-card > p {
  display: -webkit-box;
  margin: 7px 0 0;
  overflow: hidden;
  color: var(--text-secondary);
  font-size: 0.78rem;
  line-height: 1.45;
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 2;
}

.note-status-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--accent);
}

.note-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 5px;
  margin-top: 9px;
}

.note-badge {
  color: var(--text-muted);
  font-size: 0.66rem;
}

.note-badge + .note-badge::before {
  content: "· ";
}

.note-meta {
  display: flex;
  justify-content: space-between;
  gap: 10px;
  margin-top: 9px;
  color: var(--text-muted);
  font-size: 0.68rem;
}

.empty-state {
  padding: 28px 20px;
  color: var(--text-secondary);
}

.empty-state strong {
  display: block;
  color: var(--text);
}

.empty-state p {
  margin: 8px 0 16px;
  font-size: 0.82rem;
}

.empty-state button {
  min-height: 34px;
  padding: 7px 10px;
}

.editor {
  grid-area: editor;
  min-width: 0;
  overflow-y: auto;
  background: var(--surface);
  scrollbar-width: thin;
}

.editor-masthead {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 180px;
  gap: 24px;
  align-items: end;
  padding: 22px 28px 18px;
  border-bottom: 1px solid var(--border);
}

.note-identity h2 {
  margin: 0;
  font-size: clamp(1.5rem, 2.4vw, 2.25rem);
}

.editor-actions label {
  display: block;
  margin-bottom: 6px;
}

.editor-actionbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  padding: 9px 28px;
  border-bottom: 1px solid var(--border);
  background: var(--surface-subtle);
}

.format-toolbar,
.editor-toolbar {
  display: flex;
  flex-wrap: wrap;
  gap: 3px;
}

.format-toolbar button,
.editor-toolbar button {
  min-height: 31px;
  border-color: transparent;
  background: transparent;
  padding: 5px 7px;
  color: var(--text-secondary);
  font-size: 0.7rem;
}

.format-toolbar button:hover,
.editor-toolbar button:hover {
  border-color: var(--border);
  background: var(--surface);
}

.editor-toolbar .revision-action-primary {
  border-color: var(--accent);
  background: transparent;
  color: var(--accent-ink);
}

.learning-flow {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  border-bottom: 1px solid var(--border);
  padding-inline: 28px;
}

.learning-flow span {
  padding: 9px 6px;
  border-bottom: 2px solid transparent;
  color: var(--text-muted);
  font-size: 0.68rem;
  text-align: center;
}

.learning-flow span.active {
  border-bottom-color: var(--accent);
  color: var(--text);
}

.editor-workbench {
  display: grid;
  grid-template-columns: minmax(390px, 1.2fr) minmax(320px, 0.8fr);
  min-height: 620px;
}

.writing-pane,
.study-pane {
  min-width: 0;
  padding: 26px 28px 36px;
}

.writing-pane {
  border-right: 1px solid var(--border);
}

.writing-head {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 14px;
}

.writing-head h3 {
  margin: 0;
  font-size: 1.12rem;
}

.writing-head > span {
  color: var(--text-muted);
  font-size: 0.72rem;
}

#note-body {
  min-height: 560px;
  border-color: var(--border);
  background: var(--surface);
  font-family: var(--font-reading);
  font-size: var(--editor-font-size, 16px);
  line-height: 1.75;
}

.editor-hint {
  margin: 10px 0 0;
  color: var(--text-muted);
  font-size: 0.72rem;
}

.study-pane {
  display: grid;
  align-content: start;
  gap: 26px;
  background: var(--surface-subtle);
}

.summary-box,
.revision-generator-panel,
.note-intelligence-panel,
.preview-wrap,
.insights-panel {
  min-width: 0;
  padding-top: 16px;
  border-top: 1px solid var(--border-strong);
}

.summary-text,
.formatted-preview,
.generated-study-panel {
  color: var(--text-secondary);
  line-height: 1.65;
}

.revision-generator-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  border-top: 1px solid var(--border);
}

.revision-generator-grid button {
  min-height: 38px;
  border: 0;
  border-bottom: 1px solid var(--border);
  border-radius: 0;
  background: transparent;
  padding: 7px 8px;
  text-align: left;
}

.revision-generator-grid button:nth-child(odd) {
  border-right: 1px solid var(--border);
}

.revision-generator-grid button span {
  float: right;
  color: var(--accent-ink);
  font-size: 0.62rem;
}

.formatted-preview h1,
.formatted-preview h2,
.formatted-preview h3 {
  margin: 22px 0 8px;
}

.formatted-preview h1 { font-size: 1.5rem; }
.formatted-preview h2 { font-size: 1.22rem; }
.formatted-preview h3 { font-size: 1.05rem; }

.formatted-preview p,
.formatted-preview ul,
.formatted-preview ol {
  margin-bottom: 12px;
}

.summary-empty-state,
.formatted-empty-state,
.note-quality-empty {
  color: var(--text-muted);
  font-size: 0.82rem;
}

.formatted-empty-state div {
  display: grid;
  gap: 4px;
  margin-top: 10px;
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 0.72rem;
}

.note-quality-score {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  align-items: center;
  gap: 14px;
}

.note-quality-score > strong {
  font-size: 1.35rem;
}

.note-quality-score i {
  display: block;
  height: 4px;
  margin-top: 7px;
  background: var(--surface-muted);
}

.note-quality-score i b {
  display: block;
  height: 100%;
  background: var(--accent);
}

.intelligence-grid,
.dashboard-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0;
  margin-top: 16px;
  border-top: 1px solid var(--border);
}

.intelligence-grid article,
.dashboard-grid strong {
  padding: 10px 8px 0 0;
}

.intelligence-grid span,
.dashboard-grid span {
  display: block;
  color: var(--text-muted);
  font-size: 0.66rem;
}

.key-term-cloud {
  display: flex;
  flex-wrap: wrap;
  gap: 5px 10px;
  margin-top: 14px;
  color: var(--accent-ink);
  font-size: 0.76rem;
}

.instant-card-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
}

.generated-flashcard {
  position: relative;
  min-height: 170px;
  overflow: hidden;
  perspective: 1000px;
}

.generated-face {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  padding: 14px;
  background: var(--surface);
  backface-visibility: hidden;
  transition: transform 300ms ease;
}

.generated-back { transform: rotateY(180deg); }
.generated-flashcard.flipped .generated-front { transform: rotateY(180deg); }
.generated-flashcard.flipped .generated-back { transform: rotateY(360deg); }

.generated-face small,
.generated-face em {
  color: var(--text-muted);
  font-size: 0.68rem;
  font-style: normal;
}

/* Student revision */
.app-shell.revision-mode,
.app-shell.contact-mode {
  grid-template-columns: 1fr;
  grid-template-areas:
    "topbar"
    "main";
}

.app-shell.revision-mode .sidebar,
.app-shell.contact-mode .sidebar {
  display: none;
}

.revision-view,
.contact-view {
  grid-area: main;
  min-width: 0;
  overflow-y: auto;
  background: var(--canvas);
  scrollbar-width: thin;
}

.revision-view {
  padding: 0 0 64px;
}

.learning-mode-bar {
  display: none;
}

.revision-hero,
.student-class-panel,
.student-dashboard-panel,
.neat-questions-section,
.exam-practice-section,
.revision-stage,
.revision-progress-section,
.teacher-mode-panel {
  width: min(var(--content), calc(100% - 48px));
  margin-inline: auto;
}

.practice-mode-bar {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 28px;
  padding: 38px 44px 22px;
  border-bottom: 1px solid var(--border);
  background: var(--surface-subtle);
}

.practice-mode-bar[hidden],
.exam-practice-section[hidden],
.neat-questions-section[hidden] {
  display: none !important;
}

#neat-questions-current-link {
  display: none;
}

.practice-mode-bar h2,
.practice-mode-bar p {
  margin: 0;
}

.practice-mode-bar h2 {
  margin-top: 5px;
  font-size: clamp(1.7rem, 3vw, 2.4rem);
}

.practice-mode-bar > div:first-child > p:last-child {
  max-width: 620px;
  margin-top: 8px;
  color: var(--text-secondary);
}

.practice-mode-tabs {
  display: grid;
  grid-template-columns: repeat(4, minmax(105px, 1fr));
  min-width: 460px;
  border-bottom: 1px solid var(--border-strong);
}

.practice-mode-tabs button {
  min-height: 46px;
  border: 0;
  border-bottom: 3px solid transparent;
  border-radius: 0;
  background: transparent;
  color: var(--text-secondary);
}

.practice-mode-tabs button.active {
  border-bottom-color: var(--accent);
  color: var(--text);
}

.exam-practice-section {
  padding: 42px 44px 64px;
}

.exam-practice-head {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 24px;
}

.exam-practice-head h3,
.exam-practice-head p {
  margin: 0;
}

.exam-practice-head h3 {
  margin-top: 5px;
  font-size: 1.65rem;
}

.exam-practice-head > div > p:last-child {
  max-width: 680px;
  margin-top: 8px;
  color: var(--text-secondary);
}

.exam-marking-notice {
  margin: 14px 0 0;
  color: var(--text-muted);
  font-size: 0.78rem;
}

.exam-practice-panel {
  max-width: 920px;
  margin: 26px auto 0;
}

.exam-empty-state,
.exam-question-card,
.exam-feedback-card {
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-lg);
  background: var(--surface);
}

.exam-empty-state {
  display: grid;
  justify-items: start;
  gap: 10px;
  padding: 34px;
}

.exam-empty-state p {
  max-width: 620px;
  margin: 0;
  color: var(--text-secondary);
}

.exam-question-card {
  padding: 30px;
}

.exam-question-card > header,
.exam-question-card > header > div,
.exam-question-meta,
.exam-answer-footer,
.exam-feedback-actions {
  display: flex;
  align-items: center;
}

.mini-mock-shell,
.mini-mock-results {
  overflow: hidden;
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-lg);
  background: var(--surface);
}

.mini-mock-head,
.mini-mock-results > header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 22px 26px;
  border-bottom: 1px solid var(--border);
  background: var(--surface-subtle);
}

.mini-mock-head h3,
.mini-mock-head p,
.mini-mock-results > header h3,
.mini-mock-results > header p {
  margin: 0;
}

.mini-mock-clock {
  display: grid;
  justify-items: end;
  gap: 3px;
  font-variant-numeric: tabular-nums;
}

.mini-mock-clock span {
  color: var(--text-muted);
  font-size: 0.68rem;
  font-weight: 750;
  text-transform: uppercase;
}

.mini-mock-clock strong {
  font-size: 1.35rem;
}

.mini-mock-navigator {
  display: flex;
  gap: 8px;
  padding: 16px 26px;
  overflow-x: auto;
  border-bottom: 1px solid var(--border);
}

.mini-mock-navigator button {
  position: relative;
  flex: 0 0 42px;
  min-height: 42px;
  padding: 0;
  border-radius: var(--radius-sm);
}

.mini-mock-navigator button.active {
  border-color: var(--accent);
  background: var(--accent-soft);
  color: var(--accent-ink);
}

.mini-mock-navigator button.answered::after,
.mini-mock-navigator button.flagged::before {
  position: absolute;
  content: "";
}

.mini-mock-navigator button.answered::after {
  right: 4px;
  bottom: 4px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--success);
}

.mini-mock-navigator button.flagged::before {
  top: 3px;
  left: 3px;
  width: 7px;
  height: 10px;
  border-left: 6px solid var(--warning);
  border-bottom: 3px solid transparent;
  border-top: 3px solid transparent;
}

.mini-mock-question {
  padding: 30px 34px;
}

.exam-command-label {
  width: max-content;
  margin: 22px 0 0;
  padding-left: 9px;
  border-left: 3px solid var(--accent);
  color: var(--accent-ink);
  font-size: 0.72rem;
  font-weight: 800;
  text-transform: uppercase;
}

.mini-mock-question > h3 {
  max-width: 760px;
  margin: 16px 0 28px;
  font-size: 1.5rem;
  line-height: 1.35;
}

.mini-mock-question > label,
.mini-mock-confidence {
  display: grid;
  gap: 8px;
  color: var(--text-secondary);
  font-size: 0.78rem;
  font-weight: 700;
}

.mini-mock-question textarea {
  width: 100%;
  min-height: 190px;
  margin-top: 8px;
  resize: vertical;
  font: inherit;
  line-height: 1.6;
}

.mini-mock-confidence {
  width: min(240px, 100%);
  margin-top: 18px;
}

.mini-mock-actions {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 18px 26px;
  border-top: 1px solid var(--border);
  background: var(--surface-subtle);
}

.mini-mock-actions > div {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.mini-mock-breakdown {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 1px;
  background: var(--border);
}

.mini-mock-breakdown article {
  min-width: 0;
  padding: 20px;
  background: var(--surface);
}

.mini-mock-breakdown span,
.mini-mock-next-step span {
  color: var(--text-muted);
  font-size: 0.7rem;
  font-weight: 750;
  text-transform: uppercase;
}

.mini-mock-breakdown strong,
.mini-mock-next-step strong {
  display: block;
  margin-top: 6px;
}

.mini-mock-breakdown p,
.mini-mock-next-step p {
  margin: 6px 0 0;
  color: var(--text-secondary);
  font-size: 0.78rem;
  line-height: 1.45;
}

.mini-mock-results > header > strong {
  color: var(--accent-ink);
  font-size: 2.5rem;
}

.mini-mock-next-step {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 26px;
  border-top: 1px solid var(--border);
}

.mini-mock-results > .exam-feedback-actions {
  padding: 0 26px 26px;
}

.cs-lab-picker,
.cs-lab-shell,
.cs-lab-feedback {
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-lg);
  background: var(--surface);
}

.cs-lab-picker {
  padding: 28px;
}

.cs-lab-picker header h3,
.cs-lab-picker header p {
  margin: 0;
}

.cs-lab-picker header h3 {
  margin-top: 5px;
  font-size: 1.5rem;
}

.cs-lab-picker header > p:last-child {
  margin-top: 8px;
  color: var(--text-secondary);
}

.cs-lab-picker > div {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(190px, 1fr));
  gap: 10px;
  margin-top: 24px;
}

.cs-lab-picker button {
  display: grid;
  justify-items: start;
  gap: 6px;
  min-height: 126px;
  padding: 18px;
  text-align: left;
}

.cs-lab-picker button span,
.cs-lab-picker button small {
  color: var(--text-muted);
  font-size: 0.7rem;
}

.cs-lab-picker button strong {
  font-size: 1rem;
}

.cs-lab-shell > header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 22px 28px;
  border-bottom: 1px solid var(--border);
  background: var(--surface-subtle);
}

.cs-lab-shell > header h3,
.cs-lab-shell > header p {
  margin: 0;
}

.cs-lab-shell > header > span {
  color: var(--text-muted);
  font-size: 0.72rem;
  font-weight: 750;
}

.cs-lab-shell form {
  display: grid;
  gap: 18px;
  padding: 30px;
}

.cs-lab-shell form > h4 {
  max-width: 730px;
  margin: 0 0 8px;
  font-size: 1.4rem;
  line-height: 1.4;
}

.cs-lab-shell fieldset {
  display: grid;
  gap: 8px;
  margin: 0;
  padding: 0;
  border: 0;
}

.cs-lab-shell legend {
  margin-bottom: 10px;
  color: var(--text-secondary);
  font-size: 0.78rem;
  font-weight: 700;
}

.cs-lab-shell fieldset label {
  display: grid;
  grid-template-columns: auto 34px minmax(0, 1fr);
  align-items: center;
  gap: 10px;
  min-height: 52px;
  padding: 8px 12px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  cursor: pointer;
}

.cs-lab-shell fieldset label:has(input:checked) {
  border-color: var(--accent);
  background: var(--accent-soft);
}

.cs-lab-shell fieldset label > span {
  display: grid;
  width: 30px;
  height: 30px;
  place-items: center;
  border: 1px solid var(--border-strong);
  font-size: 0.72rem;
}

.cs-lab-shell textarea {
  min-height: 140px;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  line-height: 1.6;
}

.cs-lab-schema {
  margin: -8px 0 0;
  color: var(--text-muted);
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.75rem;
}

.cs-lab-shell form > .primary-button {
  width: max-content;
}

.cs-lab-feedback {
  display: grid;
  grid-template-columns: 180px minmax(0, 1fr);
  overflow: hidden;
}

.cs-lab-feedback > div:last-child {
  padding: 30px;
}

.cs-lab-feedback h3,
.cs-lab-feedback p {
  margin: 0;
}

.cs-lab-feedback h3 {
  margin-top: 8px;
  font-size: 1.25rem;
  line-height: 1.5;
}

.cs-lab-feedback > div:last-child > p:not(.eyebrow) {
  margin-top: 14px;
  color: var(--text-secondary);
}

.cs-lab-feedback-mark {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 8px;
  padding: 28px;
  background: var(--surface-muted);
}

.cs-lab-feedback.correct .cs-lab-feedback-mark {
  background: color-mix(in srgb, var(--success) 15%, var(--surface));
  color: var(--success);
}

.cs-lab-feedback.incorrect .cs-lab-feedback-mark {
  background: color-mix(in srgb, var(--warning) 14%, var(--surface));
  color: var(--warning);
}

.cs-lab-feedback-mark strong {
  font-size: 3rem;
}

.exam-question-card > header {
  justify-content: space-between;
  gap: 20px;
  padding-bottom: 18px;
  border-bottom: 1px solid var(--border);
}

.exam-question-card > header > div:first-child {
  gap: 10px;
}

.exam-question-card > header span,
.exam-question-meta span {
  color: var(--text-muted);
  font-size: 0.75rem;
  font-weight: 700;
}

.exam-question-meta {
  gap: 14px;
}

.exam-command-row {
  display: flex;
  align-items: start;
  gap: 16px;
  margin-top: 22px;
}

.exam-command-row > span {
  padding: 5px 8px;
  border-left: 3px solid var(--accent);
  background: var(--accent-soft);
  color: var(--accent-ink);
  font-size: 0.72rem;
  font-weight: 800;
  text-transform: uppercase;
}

.exam-command-row details {
  color: var(--text-secondary);
  font-size: 0.8rem;
}

.exam-command-row details p {
  max-width: 620px;
  margin: 8px 0 0;
}

.exam-question-card > h3 {
  max-width: 760px;
  margin: 28px 0;
  font-size: clamp(1.35rem, 2.2vw, 1.8rem);
  line-height: 1.3;
}

.exam-answer-form {
  display: grid;
  gap: 10px;
}

.exam-answer-form textarea {
  min-height: 190px;
  resize: vertical;
  font: inherit;
  line-height: 1.65;
}

.exam-answer-footer {
  justify-content: space-between;
  gap: 18px;
  margin-top: 8px;
}

.exam-answer-footer label {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--text-secondary);
  font-size: 0.78rem;
}

.exam-feedback-card {
  display: grid;
  grid-template-columns: 210px minmax(0, 1fr);
  overflow: hidden;
}

.exam-feedback-score {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 8px;
  padding: 30px;
  background: var(--accent-soft);
  color: var(--accent-ink);
}

.exam-feedback-score > span,
.exam-feedback-score > em {
  font-size: 0.72rem;
  font-style: normal;
  font-weight: 700;
}

.exam-feedback-score > strong {
  font-size: 3rem;
  line-height: 1;
}

.exam-feedback-score small {
  font-size: 1rem;
}

.exam-feedback-body {
  padding: 30px;
}

.exam-feedback-body h4 {
  margin: 7px 0 22px;
  font-size: 1.3rem;
}

.exam-feedback-body section {
  margin-top: 18px;
  padding-top: 18px;
  border-top: 1px solid var(--border);
}

.exam-feedback-body ul {
  margin: 10px 0 0;
  padding-left: 20px;
  color: var(--text-secondary);
  line-height: 1.55;
}

.exam-missing-points {
  border-left: 3px solid var(--warning);
  padding-left: 16px;
}

.exam-reasoning p,
.exam-result-notice {
  color: var(--text-secondary);
  line-height: 1.55;
}

.exam-result-notice {
  font-size: 0.75rem;
}

.exam-feedback-actions {
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 22px;
}

@media (max-width: 760px) {
  .practice-mode-bar,
  .exam-practice-head,
  .exam-answer-footer {
    align-items: stretch;
    flex-direction: column;
  }

  .practice-mode-bar,
  .exam-practice-section {
    padding-inline: 20px;
  }

  .practice-mode-tabs {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    min-width: 0;
    width: 100%;
  }

  .exam-question-card {
    padding: 22px;
  }

  .exam-question-card > header,
  .exam-question-card > header > div:first-child {
    align-items: flex-start;
    flex-direction: column;
  }

  .exam-feedback-card {
    grid-template-columns: 1fr;
  }

  .mini-mock-head,
  .mini-mock-actions,
  .mini-mock-next-step,
  .mini-mock-results > header {
    align-items: stretch;
    flex-direction: column;
  }

  .mini-mock-clock {
    justify-items: start;
  }

  .mini-mock-question {
    padding: 22px 20px;
  }

  .cs-lab-shell > header,
  .cs-lab-feedback {
    grid-template-columns: 1fr;
  }

  .cs-lab-shell > header {
    align-items: flex-start;
    flex-direction: column;
  }

  .cs-lab-shell form,
  .cs-lab-feedback > div:last-child {
    padding: 22px 20px;
  }

  .exam-feedback-score {
    min-height: 150px;
  }

  .exam-answer-footer label,
  .exam-answer-footer select,
  .exam-answer-footer button {
    width: 100%;
  }
}

.revision-hero {
  display: grid;
  grid-template-columns: minmax(0, 1.12fr) minmax(430px, 0.88fr);
  gap: 54px;
  align-items: end;
  padding-block: 54px 42px;
  border-bottom: 1px solid var(--border-strong);
}

.revision-hero-copy h2 {
  max-width: 680px;
  margin: 0;
  font-size: clamp(2.35rem, 4.5vw, 4.2rem);
  letter-spacing: 0;
  line-height: 1;
}

.revision-hero-copy > p:not(.eyebrow):not(.revision-access-note) {
  max-width: 650px;
  margin: 16px 0 0;
  color: var(--text-secondary);
  font-size: 1rem;
  line-height: 1.6;
}

.revision-hero-actions {
  display: flex;
  gap: 8px;
  margin-top: 24px;
}

.revision-primary-action,
.revision-secondary-action {
  min-height: 40px;
  padding: 8px 14px;
}

.revision-secondary-action {
  background: transparent;
}

.revision-access-note {
  margin: 12px 0 0;
  color: var(--text-muted);
  font-size: 0.72rem;
}

.revision-summary-grid {
  display: grid;
  grid-template-columns: 0.75fr 0.75fr 1.5fr;
  border-top: 1px solid var(--border-strong);
}

.revision-summary-card {
  min-width: 0;
  padding: 14px 14px 12px 0;
  border-bottom: 1px solid var(--border);
}

.revision-summary-card + .revision-summary-card {
  padding-left: 14px;
  border-left: 1px solid var(--border);
}

.revision-summary-card span {
  color: var(--text-muted);
  font-size: 0.67rem;
  font-weight: 700;
  text-transform: uppercase;
}

.revision-summary-card strong {
  display: block;
  margin-top: 8px;
  font-size: 1.25rem;
  line-height: 1.15;
}

.revision-summary-card.recommended strong {
  font-size: 0.95rem;
}

.revision-summary-card p {
  margin: 6px 0 0;
  color: var(--text-muted);
  font-size: 0.72rem;
}

.student-class-panel,
.student-dashboard-panel,
.neat-questions-section,
.revision-stage,
.revision-progress-section {
  padding-block: 44px;
  border-bottom: 1px solid var(--border-strong);
}

/* Student destinations share the revision engine but reveal only the task in view. */
.revision-view[data-student-view="home"] .neat-questions-section,
.revision-view[data-student-view="home"] .revision-stage,
.revision-view[data-student-view="home"] .revision-progress-section,
.revision-view[data-student-view="revise"] .revision-hero,
.revision-view[data-student-view="revise"] .student-dashboard-panel,
.revision-view[data-student-view="revise"] .student-class-panel,
.revision-view[data-student-view="revise"] .neat-questions-section,
.revision-view[data-student-view="revise"] .revision-progress-section,
.revision-view[data-student-view="practice"] .revision-hero,
.revision-view[data-student-view="practice"] .student-dashboard-panel,
.revision-view[data-student-view="practice"] .student-class-panel,
.revision-view[data-student-view="practice"] .revision-stage,
.revision-view[data-student-view="practice"] .revision-progress-section,
.revision-view[data-student-view="progress"] .revision-hero,
.revision-view[data-student-view="progress"] .student-dashboard-panel,
.revision-view[data-student-view="progress"] .student-class-panel,
.revision-view[data-student-view="progress"] .neat-questions-section,
.revision-view[data-student-view="progress"] .revision-stage {
  display: none;
}

.revision-view[data-student-view="home"] .student-class-panel {
  padding-top: 28px;
}

.revision-view[data-student-view="revise"] .revision-stage,
.revision-view[data-student-view="practice"] .neat-questions-section,
.revision-view[data-student-view="progress"] .revision-progress-section {
  padding-top: 54px;
}

.student-class-panel:empty,
.student-dashboard-panel:empty {
  display: none;
}

.student-class-head {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(320px, 0.7fr);
  gap: 48px;
  align-items: start;
}

.student-class-head h3,
.student-dashboard-head h3,
.topic-packs-head h3,
.revision-stage-head h3,
.neat-questions-head h3 {
  margin: 0;
  font-size: clamp(1.35rem, 2.2vw, 1.9rem);
}

.student-class-head p:not(.eyebrow),
.student-dashboard-head p:not(.eyebrow),
.topic-packs-head p,
.neat-questions-head p,
.revision-stage-head p {
  max-width: 680px;
  margin: 8px 0 0;
  color: var(--text-secondary);
}

.join-class-form {
  padding-left: 24px;
  border-left: 1px solid var(--border);
}

.join-class-form label {
  display: block;
  margin-bottom: 7px;
}

.class-code-row,
.join-class-actions {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 6px;
}

.class-code-row button,
.join-class-actions button {
  min-height: 40px;
  padding: 7px 10px;
}

.join-class-actions {
  justify-content: end;
  grid-template-columns: auto auto;
  margin-top: 7px;
}

.class-membership-notice {
  margin: 14px 0 0;
  color: var(--text-muted);
  font-size: 0.75rem;
}

.student-class-context,
.student-class-card {
  margin-top: 20px;
  border-top: 1px solid var(--border);
  padding-top: 14px;
}

.student-class-context {
  display: grid;
  grid-template-columns: auto 240px minmax(0, 1fr);
  gap: 12px;
  align-items: center;
}

.student-class-context span {
  color: var(--text-muted);
  font-size: 0.76rem;
}

.student-class-list {
  display: grid;
}

.student-class-card {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(280px, 0.7fr);
  gap: 32px;
}

.student-class-card h4 {
  margin: 4px 0;
  font-size: 1rem;
}

.student-class-card p,
.student-class-card small,
.student-class-card-actions span {
  color: var(--text-muted);
  font-size: 0.76rem;
}

.student-class-card-actions button {
  min-height: 32px;
  padding: 5px 8px;
  font-size: 0.72rem;
}

.student-class-empty {
  display: grid;
  gap: 4px;
  margin-top: 18px;
  padding: 14px 0;
  border-top: 1px solid var(--border);
  color: var(--text-muted);
}

.student-dashboard-head,
.topic-packs-head,
.revision-stage-head,
.neat-questions-head {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 24px;
}

.student-dashboard-head > button,
.neat-questions-actions button {
  min-height: 38px;
  padding: 7px 12px;
  border-color: var(--accent);
  background: var(--accent);
  color: #fff;
}

.student-dashboard-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.5fr) minmax(260px, 0.75fr);
  margin-top: 24px;
  border-top: 1px solid var(--border-strong);
}

.today-session {
  display: grid;
  grid-template-columns: minmax(0, 0.92fr) minmax(360px, 1.08fr);
  gap: clamp(34px, 5vw, 72px);
  align-items: start;
}

.today-session-copy h3 {
  max-width: 580px;
  margin: 0;
  font-size: clamp(1.7rem, 3vw, 2.65rem);
  line-height: 1.08;
}

.today-session-copy > p:not(.eyebrow) {
  max-width: 560px;
  margin: 14px 0 0;
  color: var(--text-secondary);
  font-size: 0.92rem;
}

.today-session-actions {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  margin-top: 22px;
}

.today-session-actions > button {
  min-height: 42px;
  padding: 8px 16px;
  border-color: var(--accent);
  background: var(--accent);
  color: #fff;
}

.session-duration-menu {
  position: relative;
}

.session-duration-menu summary {
  min-height: 42px;
  padding: 9px 13px;
  border: 1px solid var(--border-strong);
  color: var(--text-secondary);
  cursor: pointer;
  font-weight: 650;
  list-style: none;
}

.session-duration-menu summary::-webkit-details-marker {
  display: none;
}

.session-duration-menu > div {
  position: absolute;
  z-index: 3;
  top: calc(100% + 5px);
  right: 0;
  display: grid;
  min-width: 170px;
  border: 1px solid var(--border-strong);
  background: var(--surface);
  box-shadow: var(--shadow-dialog);
}

.session-duration-menu > div button {
  min-height: 40px;
  border: 0;
  border-bottom: 1px solid var(--border);
  border-radius: 0;
  text-align: left;
}

.today-session-list {
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--border-strong);
  list-style: none;
}

.today-session-list li {
  display: grid;
  grid-template-columns: minmax(110px, 0.34fr) minmax(0, 1fr);
  gap: 4px 16px;
  padding: 13px 0;
  border-bottom: 1px solid var(--border);
}

.today-session-list span {
  grid-row: 1 / span 2;
  color: var(--text-muted);
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
}

.today-session-list strong {
  font-size: 0.86rem;
}

.today-session-list small {
  color: var(--text-muted);
  font-size: 0.72rem;
}

.student-home-sections {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  margin-top: 42px;
  border-top: 1px solid var(--border-strong);
}

.student-home-sections > section {
  min-width: 0;
  padding: 19px 26px 19px 0;
  border-bottom: 1px solid var(--border);
}

.student-home-sections > section:nth-child(even) {
  padding-right: 0;
  padding-left: 26px;
  border-left: 1px solid var(--border);
}

.student-home-sections p {
  min-height: 52px;
  margin: 0;
  color: var(--text-secondary);
  font-size: 0.82rem;
}

.student-home-sections button {
  min-height: 34px;
  margin-top: 12px;
  padding: 6px 9px;
  font-size: 0.74rem;
}

.student-action-card {
  min-width: 0;
  padding: 16px 0;
  border-bottom: 1px solid var(--border);
}

.student-action-card:nth-child(even) {
  padding-left: 22px;
  border-left: 1px solid var(--border);
}

.student-action-card:nth-child(odd):not(.primary-path) {
  padding-right: 22px;
}

.student-action-card.primary-path {
  grid-row: span 2;
  padding: 24px 32px 24px 0;
  border-right: 1px solid var(--border);
  border-left: 0;
}

.student-action-card > span,
.retention-card > span,
.recommendation-card > span,
.deck-summary-grid span {
  color: var(--text-muted);
  font-size: 0.68rem;
  font-weight: 720;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.student-action-card > strong {
  display: block;
  margin-top: 7px;
  font-size: 1rem;
}

.student-action-card.primary-path > strong {
  max-width: 620px;
  font-size: 1.6rem;
}

.student-action-card p {
  margin: 7px 0 0;
  color: var(--text-secondary);
  font-size: 0.82rem;
}

.student-card-actions,
.student-quick-action-grid,
.neat-questions-actions,
.revision-actions,
.deck-summary-actions,
.revision-paywall-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 7px;
}

.student-card-actions {
  margin-top: 18px;
}

.student-action-card button,
.student-card-actions button,
.student-quick-action-grid button {
  min-height: 32px;
  padding: 5px 8px;
  font-size: 0.72rem;
}

.student-action-card.primary-path .student-card-actions button:first-child {
  border-color: var(--accent);
  background: var(--accent);
  color: #fff;
}

.student-recent-strip {
  display: flex;
  flex-wrap: wrap;
  gap: 5px 16px;
  margin-top: 12px;
  color: var(--text-muted);
  font-size: 0.7rem;
}

.neat-questions-brand {
  display: flex;
  align-items: flex-start;
  gap: 12px;
}

.neat-questions-actions {
  align-items: center;
  justify-content: flex-end;
}

.neat-questions-actions > span {
  color: var(--text-muted);
  font-size: 0.72rem;
}

.neat-quiz-panel {
  margin-top: 24px;
}

.neat-quiz-empty,
.neat-quiz-complete,
.neat-quiz-player {
  border: 1px solid var(--border-strong);
  background: var(--surface);
  padding: 24px;
}

.neat-quiz-empty,
.neat-quiz-complete {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto auto;
  gap: 24px;
  align-items: center;
}

.neat-quiz-empty h4,
.neat-quiz-complete h4 {
  margin: 0;
  font-size: 1.25rem;
}

.neat-quiz-empty p,
.neat-quiz-complete p {
  margin: 7px 0 0;
  color: var(--text-secondary);
}

.neat-quiz-empty > button {
  min-height: 40px;
  padding: 8px 12px;
  border-color: var(--accent);
  background: var(--accent);
  color: #fff;
}

.quick-practice-note {
  color: var(--text-muted);
  font-size: 0.7rem;
}

.neat-quiz-player-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 24px;
}

.neat-quiz-player-head h4 {
  margin: 0;
  font-size: 1.3rem;
}

.neat-quiz-stats {
  display: grid;
  grid-template-columns: repeat(4, auto);
  gap: 16px;
  color: var(--text-muted);
  font-size: 0.72rem;
}

.neat-quiz-stats strong {
  color: var(--text);
  font-size: 0.92rem;
}

.neat-quiz-meter {
  margin: 20px 0 26px;
}

.neat-quiz-question > span {
  color: var(--text-muted);
  font-size: 0.7rem;
  text-transform: uppercase;
}

.neat-quiz-question > strong {
  display: block;
  max-width: 760px;
  margin-top: 8px;
  font-size: clamp(1.25rem, 2.2vw, 1.8rem);
}

.neat-quiz-options {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
  margin-top: 22px;
}

.neat-quiz-option {
  display: grid;
  grid-template-columns: 28px minmax(0, 1fr);
  min-height: 62px;
  align-items: center;
  gap: 10px;
  padding: 10px;
  text-align: left;
}

.neat-quiz-option > span {
  display: grid;
  width: 24px;
  height: 24px;
  place-items: center;
  border: 1px solid var(--border);
  color: var(--text-muted);
  font-size: 0.7rem;
}

.neat-quiz-option.correct {
  border-color: var(--success);
  background: color-mix(in srgb, var(--success) 9%, var(--surface));
}

.neat-quiz-option.incorrect {
  border-color: var(--danger);
  background: var(--danger-soft);
}

.neat-quiz-feedback {
  margin-top: 18px;
  padding: 12px 14px;
  border-left: 3px solid var(--success);
  background: var(--surface-subtle);
}

.neat-quiz-feedback.incorrect {
  border-left-color: var(--danger);
}

.neat-quiz-feedback p,
.neat-quiz-feedback small {
  display: block;
  margin: 5px 0 0;
  color: var(--text-secondary);
}

.neat-quiz-controls {
  display: flex;
  justify-content: flex-end;
  gap: 7px;
  margin-top: 20px;
}

.neat-quiz-controls button {
  min-height: 36px;
  padding: 7px 11px;
}

.neat-quiz-controls button:last-child:not(:disabled) {
  border-color: var(--accent);
  background: var(--accent);
  color: #fff;
}

.neat-quiz-result-ring {
  display: grid;
  width: 88px;
  height: 88px;
  place-content: center;
  border: 7px solid var(--accent-soft);
  border-radius: 50%;
  text-align: center;
}

.neat-quiz-result-ring strong,
.neat-quiz-result-ring span {
  display: block;
}

.neat-quiz-result-ring span {
  color: var(--text-muted);
  font-size: 0.65rem;
}

.topic-packs-head {
  margin-top: 44px;
  padding-top: 28px;
  border-top: 1px solid var(--border-strong);
}

.topic-packs-head > p {
  max-width: 440px;
  text-align: right;
}

.neat-questions-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1px;
  margin-top: 20px;
  border: 1px solid var(--border);
  background: var(--border);
}

.neat-question-card {
  display: flex;
  min-width: 0;
  min-height: 218px;
  flex-direction: column;
  padding: 16px;
  background: var(--surface);
}

.neat-question-card.active {
  box-shadow: inset 3px 0 0 var(--accent);
}

.neat-question-card.locked {
  background: var(--surface-subtle);
  color: var(--text-muted);
}

.question-card-topline,
.topic-card-meta,
.topic-card-actions {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
}

.question-code {
  color: var(--accent-ink);
  font-size: 0.72rem;
  font-weight: 760;
}

.question-current,
.question-variant,
.revision-topic-badge {
  color: var(--text-muted);
  font-size: 0.62rem;
  font-weight: 650;
}

.question-variant.pro,
.revision-topic-badge.pro {
  color: var(--danger);
}

.question-variant.free,
.revision-topic-badge.free {
  color: var(--success);
}

.neat-question-card-copy {
  margin: 14px 0 auto;
}

.neat-question-card-copy strong,
.neat-question-card-copy span {
  display: block;
}

.neat-question-card-copy strong {
  font-size: 1rem;
}

.neat-question-card-copy span,
.topic-lock-note span {
  margin-top: 5px;
  color: var(--text-muted);
  font-size: 0.72rem;
}

.topic-lock-note {
  margin: 8px 0;
  font-size: 0.72rem;
}

.topic-card-meter {
  margin-top: 16px;
}

.topic-card-meta {
  margin-top: 7px;
  color: var(--text-muted);
  font-size: 0.65rem;
}

.topic-card-actions {
  margin-top: 14px;
}

.topic-card-actions button {
  flex: 1 1 0;
  min-height: 33px;
  padding: 5px;
  font-size: 0.68rem;
}

.topic-card-actions button:last-child {
  border-color: var(--accent);
  color: var(--accent-ink);
}

.revision-stage-head {
  align-items: flex-start;
}

.revision-stage-head > div:first-child {
  max-width: 720px;
}

.revision-actions button {
  min-height: 34px;
  padding: 6px 9px;
  background: transparent;
  font-size: 0.72rem;
}

.revision-card-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  grid-auto-rows: minmax(300px, auto);
  gap: 14px;
  margin-top: 24px;
}

.revision-card {
  min-width: 0;
  min-height: 300px;
  perspective: 1200px;
  outline: 0;
}

.revision-card-inner {
  position: relative;
  display: block;
  width: 100%;
  height: 100%;
  min-height: 300px;
  transform-style: preserve-3d;
  transition: transform 360ms cubic-bezier(.2,.75,.25,1);
}

.revision-card.flipped .revision-card-inner {
  transform: rotateY(180deg);
}

.revision-card-face {
  position: absolute;
  inset: 0;
  display: flex;
  min-width: 0;
  min-height: 300px;
  flex-direction: column;
  justify-content: space-between;
  overflow: auto;
  border: 1px solid var(--border-strong);
  border-top: 3px solid var(--accent);
  background: var(--surface);
  padding: 22px;
  backface-visibility: hidden;
}

.revision-card-back {
  transform: rotateY(180deg);
  background: var(--surface-subtle);
}

.revision-card-category {
  color: var(--text-muted);
  font-size: 0.68rem;
  font-weight: 730;
  letter-spacing: 0.07em;
  text-transform: uppercase;
}

.revision-card-front > strong {
  max-width: 620px;
  margin-block: auto;
  font-size: clamp(1.35rem, 2.3vw, 2rem);
  line-height: 1.18;
}

.revision-card-answer {
  margin-block: auto;
  color: var(--text);
  font-size: 1rem;
  line-height: 1.65;
}

.revision-card-cue {
  color: var(--accent-ink);
  font-size: 0.72rem;
  font-weight: 650;
}

.revision-card-back-actions {
  display: grid;
  gap: 10px;
}

.confidence-controls {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 6px;
}

.confidence-button {
  min-height: 35px;
  padding: 6px;
  font-size: 0.7rem;
}

.confidence-button.needs-practice {
  border-color: var(--danger);
  color: var(--danger);
}

.confidence-button.good,
.confidence-button.easy {
  border-color: var(--success);
  color: var(--success);
}

.revision-paywall-panel {
  grid-column: 1 / -1;
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(220px, 0.45fr);
  gap: 32px;
  align-items: start;
  border: 1px solid var(--border-strong);
  border-top: 3px solid var(--accent);
  background: var(--surface);
  padding: 28px;
}

.revision-paywall-panel h3 {
  margin: 0;
  font-size: 1.5rem;
}

.revision-paywall-panel p {
  margin: 8px 0 0;
  color: var(--text-secondary);
}

.revision-paywall-panel article {
  padding-left: 22px;
  border-left: 1px solid var(--border);
}

.revision-paywall-panel article span,
.revision-paywall-panel article strong,
.revision-paywall-panel article small {
  display: block;
}

.revision-paywall-panel article small {
  margin-top: 7px;
  color: var(--text-muted);
}

.revision-paywall-actions {
  grid-column: 1 / -1;
}

.revision-paywall-actions button,
.deck-summary-actions button {
  min-height: 36px;
  padding: 7px 11px;
}

.revision-paywall-actions button:first-child {
  border-color: var(--accent);
  background: var(--accent);
  color: #fff;
}

.deck-summary-panel {
  grid-column: 1 / -1;
  border-top: 2px solid var(--accent);
  border-bottom: 1px solid var(--border-strong);
  padding: 24px 0;
}

.deck-summary-panel h3 {
  margin: 0;
  font-size: 1.5rem;
}

.deck-summary-panel > div > p:not(.eyebrow),
.deck-summary-copy > p:not(.eyebrow),
.recommendation-card p,
.weak-review-note {
  color: var(--text-secondary);
}

.deck-summary-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  margin-block: 22px;
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.deck-summary-grid article {
  padding: 14px;
  border-right: 1px solid var(--border);
}

.deck-summary-grid article:last-child {
  border-right: 0;
}

.deck-summary-grid strong,
.deck-summary-grid em {
  display: block;
}

.deck-summary-grid strong {
  margin-top: 6px;
  font-size: 1.4rem;
}

.deck-summary-grid em {
  color: var(--text-muted);
  font-size: 0.68rem;
  font-style: normal;
}

.recommendation-card {
  padding-left: 16px;
  border-left: 3px solid var(--accent);
}

.recommendation-card strong {
  display: block;
  margin-top: 5px;
}

.revision-progress-section {
  border-bottom: 0;
}

.revision-progress-stack {
  display: grid;
  grid-template-columns: minmax(320px, 0.56fr) minmax(0, 1.44fr);
  gap: 40px;
  align-items: start;
}

.revision-progress-card {
  display: grid;
  grid-template-columns: 128px minmax(0, 1fr);
  border-top: 1px solid var(--border-strong);
}

.revision-progress,
.revision-course-progress {
  min-width: 0;
  padding: 20px 0;
}

.revision-progress {
  position: relative;
  display: grid;
  place-items: center;
  padding-top: 30px;
}

.revision-progress::before {
  position: absolute;
  top: 7px;
  left: 0;
  width: 100%;
  color: var(--text-muted);
  content: "Current deck";
  font-size: 0.62rem;
  font-weight: 700;
  text-align: center;
  text-transform: uppercase;
}

.revision-progress-ring {
  width: 104px;
  height: 104px;
  transform: rotate(-90deg);
}

.revision-progress-track,
.revision-progress-value {
  fill: none;
  stroke-width: 7;
}

.revision-progress-track {
  stroke: var(--surface-muted);
}

.revision-progress-value {
  stroke: var(--accent);
  stroke-dasharray: 283;
  stroke-dashoffset: 283;
  stroke-linecap: butt;
  transition: stroke-dashoffset 300ms ease;
}

.revision-progress-text {
  position: absolute;
  display: grid;
  max-width: 74px;
  place-items: center;
  text-align: center;
}

.revision-progress-text strong {
  font-size: 1.1rem;
}

.revision-progress-text span {
  color: var(--text-muted);
  font-size: 0.59rem;
  line-height: 1.25;
}

.revision-course-progress {
  padding-left: 20px;
  border-left: 1px solid var(--border);
}

.revision-course-progress > span {
  color: var(--text-muted);
  font-size: 0.68rem;
  text-transform: uppercase;
}

.revision-course-progress > strong {
  display: block;
  margin-top: 7px;
  font-size: 1.7rem;
}

.revision-course-progress p {
  margin: 4px 0 12px;
  color: var(--text-muted);
  font-size: 0.72rem;
}

.revision-course-progress button {
  min-height: 34px;
  margin-top: 14px;
  padding: 6px 9px;
}

.revision-mastery-panel {
  min-width: 0;
  border-top: 1px solid var(--border-strong);
  padding-top: 20px;
}

.mastery-map-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.mastery-map-head span,
.mastery-map-head strong {
  display: block;
}

.mastery-map-head span {
  color: var(--text-muted);
  font-size: 0.68rem;
  text-transform: uppercase;
}

.mastery-map-head button {
  min-height: 32px;
  padding: 5px 8px;
  font-size: 0.7rem;
}

.mastery-map-grid {
  display: grid;
  grid-template-columns: repeat(8, 1fr);
  gap: 5px;
  margin-top: 16px;
}

.mastery-dot {
  min-height: 64px;
}

.mastery-dot small {
  max-width: 100%;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.mistake-journal-panel {
  margin-top: 44px;
  padding-top: 32px;
  border-top: 1px solid var(--border-strong);
}

.mistake-journal-head {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 28px;
}

.mistake-journal-head h3 {
  margin: 0;
  font-size: 1.45rem;
}

.mistake-journal-head p:not(.eyebrow) {
  max-width: 650px;
  margin: 8px 0 0;
  color: var(--text-secondary);
}

.mistake-journal-head > span {
  flex: 0 0 auto;
  color: var(--text-muted);
  font-size: 0.74rem;
}

.mistake-journal-list {
  margin-top: 20px;
  border-top: 1px solid var(--border);
}

.mistake-journal-list article {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 24px;
  align-items: center;
  padding: 15px 0;
  border-bottom: 1px solid var(--border);
}

.mistake-journal-list span {
  color: var(--text-muted);
  font-size: 0.68rem;
  font-weight: 700;
  text-transform: uppercase;
}

.mistake-journal-list strong {
  display: block;
  margin-top: 4px;
}

.mistake-journal-list p,
.mistake-journal-empty p {
  margin: 5px 0 0;
  color: var(--text-secondary);
  font-size: 0.8rem;
}

.mistake-journal-list button,
.mistake-journal-empty button {
  min-height: 36px;
  padding: 7px 11px;
}

.mistake-journal-empty {
  margin-top: 18px;
  padding: 18px 0;
  border-top: 1px solid var(--border);
}

.mistake-journal-empty button {
  margin-top: 12px;
}

.mastery-dot {
  min-width: 0;
  min-height: 52px;
  padding: 6px 3px;
  border-color: var(--border);
  background: var(--surface);
}

.mastery-dot span,
.mastery-dot small {
  display: block;
}

.mastery-dot span {
  font-size: 0.68rem;
}

.mastery-dot small {
  margin-top: 3px;
  color: var(--text-muted);
  font-size: 0.6rem;
}

.mastery-dot.active {
  border-color: var(--accent);
  box-shadow: inset 0 -2px 0 var(--accent);
}

.mastery-dot.earned {
  background: var(--accent-soft);
}

.mastery-dot.locked {
  background: var(--surface-subtle);
  opacity: 0.68;
}

.revision-retention-grid {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  margin-top: 36px;
  border-top: 1px solid var(--border-strong);
}

.retention-card {
  min-width: 0;
  padding: 16px 18px 0 0;
}

.retention-card + .retention-card {
  padding-left: 18px;
  border-left: 1px solid var(--border);
}

.retention-card strong {
  display: block;
  margin-top: 6px;
}

.retention-card p {
  margin: 6px 0 0;
  color: var(--text-muted);
  font-size: 0.76rem;
}

.revision-topic-list {
  display: grid;
}

.revision-topic-button {
  display: grid;
  grid-template-columns: 36px minmax(0, 1fr) auto;
  align-items: center;
  gap: 10px;
  width: 100%;
  border: 0;
  border-bottom: 1px solid var(--border);
  border-radius: 0;
  background: transparent;
  padding: 10px 4px;
  text-align: left;
}

.revision-topic-meta span,
.revision-topic-meta strong {
  display: block;
}

.revision-topic-index,
.revision-topic-code,
.revision-topic-count {
  color: var(--text-muted);
  font-size: 0.68rem;
}

.revision-topic-count {
  text-align: right;
}

/* Teacher workspace */
.teacher-mode-panel {
  padding-block: 44px 64px;
}

.teacher-hero,
.teacher-upgrade-panel {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(280px, 0.45fr);
  gap: 48px;
  align-items: end;
  padding-bottom: 34px;
  border-bottom: 1px solid var(--border-strong);
}

.teacher-hero h2,
.teacher-upgrade-panel h2 {
  max-width: 760px;
  margin: 0;
  font-size: clamp(2.15rem, 4vw, 3.8rem);
  letter-spacing: 0;
  line-height: 1.02;
}

.teacher-hero p:not(.eyebrow),
.teacher-upgrade-panel p:not(.eyebrow) {
  max-width: 700px;
  margin: 14px 0 0;
  color: var(--text-secondary);
  line-height: 1.6;
}

.teacher-preview-card {
  padding-left: 20px;
  border-left: 3px solid var(--accent);
}

.teacher-preview-card span,
.teacher-preview-card strong {
  display: block;
}

.teacher-preview-card span {
  color: var(--text-muted);
  font-size: 0.68rem;
  text-transform: uppercase;
}

.teacher-preview-card strong {
  margin-top: 8px;
}

.teacher-tabs {
  display: flex;
  overflow-x: auto;
  border-bottom: 1px solid var(--border-strong);
  scrollbar-width: thin;
}

.teacher-tabs button {
  flex: 0 0 auto;
  min-height: 44px;
  border: 0;
  border-bottom: 3px solid transparent;
  border-radius: 0;
  background: transparent;
  padding: 8px 13px;
  color: var(--text-muted);
  font-size: 0.76rem;
}

.teacher-tabs button.active {
  border-bottom-color: var(--accent);
  color: var(--text);
}

.teacher-section {
  padding-top: 34px;
}

.teacher-section-head {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 28px;
  margin-bottom: 24px;
}

.teacher-section-head h3 {
  margin: 0;
  font-size: 1.7rem;
}

.teacher-mode-note,
.empty-copy {
  color: var(--text-muted);
  font-size: 0.78rem;
}

.class-selector {
  display: flex;
  align-items: center;
  gap: 8px;
}

.class-selector select {
  min-width: 190px;
}

.teacher-metric-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  border-top: 1px solid var(--border-strong);
  border-bottom: 1px solid var(--border);
}

.teacher-metric-grid article {
  min-width: 0;
  padding: 15px;
  border-right: 1px solid var(--border);
}

.teacher-metric-grid article:last-child {
  border-right: 0;
}

.teacher-metric-grid strong,
.teacher-metric-grid span {
  display: block;
}

.teacher-metric-grid strong {
  font-size: 1.45rem;
}

.teacher-metric-grid span {
  margin-top: 4px;
  color: var(--text-muted);
  font-size: 0.68rem;
}

.teacher-dashboard-grid,
.teacher-management-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(300px, 0.85fr);
  gap: 34px;
  margin-top: 30px;
}

.teacher-panel-card,
.teacher-form,
.teacher-empty-state,
.teacher-upgrade-grid article {
  min-width: 0;
  padding-top: 17px;
  border-top: 1px solid var(--border-strong);
}

.teacher-panel-card h4,
.teacher-form h4 {
  margin: 0 0 12px;
  font-size: 1rem;
}

.teacher-form {
  display: grid;
  gap: 9px;
}

.teacher-form textarea {
  min-height: 130px;
}

.teacher-form button,
.teacher-empty-state button,
.teacher-inline-action,
.teacher-action-list button,
.teacher-report-grid button,
.teacher-table button {
  min-height: 34px;
  padding: 6px 9px;
  font-size: 0.72rem;
}

.teacher-empty-state {
  color: var(--text-secondary);
}

.teacher-action-list,
.teacher-assignment-list,
.activity-list,
.topic-insight-list {
  display: grid;
}

.teacher-action-list > *,
.teacher-assignment-card,
.activity-item,
.watchlist-item,
.compact-topic-insight,
.class-card {
  padding: 12px 0;
  border-bottom: 1px solid var(--border);
}

.teacher-assignment-card,
.class-card {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 18px;
}

.teacher-assignment-card strong,
.teacher-assignment-card p,
.class-card strong,
.class-card p,
.activity-item strong,
.activity-item span {
  display: block;
}

.teacher-assignment-card p,
.class-card p,
.activity-item span,
.watchlist-item p,
.compact-topic-insight p {
  margin: 4px 0 0;
  color: var(--text-muted);
  font-size: 0.74rem;
}

.assignment-meta-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 14px;
  color: var(--text-muted);
  font-size: 0.68rem;
}

.teacher-table-wrap,
.topic-heatmap-wrap {
  width: 100%;
  overflow-x: auto;
  border: 1px solid var(--border);
  background: var(--surface);
}

.teacher-table,
.topic-heatmap {
  width: 100%;
  min-width: 720px;
  border-collapse: collapse;
}

.teacher-table th,
.teacher-table td,
.topic-heatmap th,
.topic-heatmap td {
  padding: 11px 12px;
  border-bottom: 1px solid var(--border);
  text-align: left;
  vertical-align: top;
}

.teacher-table th,
.topic-heatmap th {
  background: var(--surface-subtle);
  color: var(--text-muted);
  font-size: 0.68rem;
  font-weight: 720;
  text-transform: uppercase;
}

.teacher-table td,
.topic-heatmap td {
  font-size: 0.78rem;
}

.teacher-table td span {
  display: block;
  color: var(--text-muted);
}

.topic-heatmap td {
  text-align: center;
}

.topic-heatmap td.empty {
  color: var(--text-muted);
}

.heatmap-legend {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 10px;
  color: var(--text-muted);
  font-size: 0.7rem;
}

.teacher-report-grid,
.teacher-upgrade-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
}

.teacher-report-grid .teacher-panel-card > span,
.teacher-upgrade-grid span {
  color: var(--text-muted);
  font-size: 0.68rem;
  text-transform: uppercase;
}

.teacher-report-grid strong,
.teacher-upgrade-grid strong {
  display: block;
  margin-top: 6px;
}

.teacher-report-grid p,
.teacher-upgrade-grid p {
  margin: 6px 0 14px;
  color: var(--text-secondary);
  font-size: 0.78rem;
}

.teacher-upgrade-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 7px;
}

.teacher-upgrade-actions button {
  min-height: 40px;
  padding: 8px 12px;
}

.teacher-upgrade-actions button:first-child {
  border-color: var(--accent);
  background: var(--accent);
  color: #fff;
}

.teacher-upgrade-grid {
  grid-column: 1 / -1;
  margin-top: 10px;
}

/* Contact */
.contact-view {
  padding-bottom: 64px;
}

.contact-hero,
.contact-layout,
.contact-credibility-band,
.contact-future-grid {
  width: min(var(--content), calc(100% - 48px));
  margin-inline: auto;
}

.contact-hero {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 48px;
  align-items: end;
  padding-block: 54px 38px;
  border-bottom: 1px solid var(--border-strong);
}

.contact-hero h2 {
  max-width: 900px;
  margin: 0;
  font-size: clamp(2.4rem, 5vw, 4.5rem);
  letter-spacing: 0;
  line-height: 0.98;
}

.contact-hero p:not(.eyebrow) {
  max-width: 760px;
  margin: 16px 0 0;
  color: var(--text-secondary);
  font-size: 1rem;
  line-height: 1.6;
}

.contact-trust-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 0 28px;
  margin-top: 24px;
}

.contact-trust-grid article {
  padding: 9px 0;
}

.contact-trust-grid span,
.contact-trust-grid strong {
  display: block;
}

.contact-trust-grid span,
.contact-credibility-band span {
  color: var(--text-muted);
  font-size: 0.66rem;
  text-transform: uppercase;
}

.contact-trust-grid strong {
  margin-top: 2px;
  font-size: 0.8rem;
}

.contact-email-pill {
  min-height: 40px;
  padding: 8px 12px;
  border-color: var(--accent);
  border-radius: var(--radius-sm);
  background: transparent;
  color: var(--accent-ink);
}

.contact-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.35fr) minmax(290px, 0.65fr);
  gap: 54px;
  padding-block: 44px;
}

.contact-card {
  min-width: 0;
}

.contact-form-card h3,
.contact-route-card h3,
.contact-future-grid h3 {
  margin: 0;
  font-size: 1.35rem;
}

.contact-card > p:not(.eyebrow),
.contact-route-card p,
.contact-future-grid p:not(.eyebrow) {
  margin: 8px 0 0;
  color: var(--text-secondary);
}

.contact-form {
  display: grid;
  gap: 10px;
  margin-top: 24px;
}

.contact-form textarea {
  min-height: 190px;
}

.contact-form-meta {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  color: var(--text-muted);
  font-size: 0.72rem;
}

.contact-form-meta p {
  margin: 0;
}

.contact-form-meta .near-limit {
  color: var(--warning);
}

.contact-submit-button {
  justify-self: start;
  min-height: 40px;
  padding: 8px 14px;
}

.contact-aside {
  border-top: 1px solid var(--border-strong);
}

.contact-route-card {
  padding: 18px 0;
  border-bottom: 1px solid var(--border);
}

.contact-route-card button {
  min-height: 32px;
  margin-top: 12px;
  padding: 5px 8px;
  border-color: transparent;
  background: transparent;
  color: var(--accent-ink);
}

.featured-contact-card {
  border-left: 3px solid var(--accent);
  padding-left: 16px;
}

.contact-credibility-band,
.contact-future-grid {
  border-top: 1px solid var(--border-strong);
  padding-block: 32px;
}

.contact-credibility-band {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
}

.contact-credibility-band article {
  padding-right: 18px;
}

.contact-credibility-band article + article {
  padding-left: 18px;
  border-left: 1px solid var(--border);
}

.contact-credibility-band p {
  margin: 5px 0 0;
  color: var(--text-secondary);
  font-size: 0.78rem;
}

.contact-future-grid {
  display: grid;
  grid-template-columns: minmax(220px, 0.5fr) minmax(0, 1fr);
  gap: 50px;
}

.future-support-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  border-top: 1px solid var(--border);
}

.future-support-grid article {
  padding: 14px 14px 14px 0;
  border-bottom: 1px solid var(--border);
}

.future-support-grid article:nth-child(even) {
  padding-left: 14px;
  border-left: 1px solid var(--border);
}

.future-support-grid button {
  min-width: 0;
  min-height: 76px;
  border: 0;
  border-bottom: 1px solid var(--border);
  border-radius: 0;
  background: transparent;
  padding: 13px 14px 13px 0;
  text-align: left;
}

.future-support-grid button:nth-child(even) {
  padding-left: 14px;
  border-left: 1px solid var(--border);
}

.future-support-grid button span,
.future-support-grid button strong {
  display: block;
}

.future-support-grid button span {
  color: var(--text-muted);
  font-size: 0.66rem;
  text-transform: uppercase;
}

.future-support-grid button strong {
  margin-top: 4px;
  font-size: 0.84rem;
}

/* Dialogs, plans, achievements, settings */
.pricing-modal,
.badge-modal,
.achievement-modal,
.settings-modal,
.legal-modal {
  position: fixed;
  inset: 0;
  z-index: 70;
  display: grid;
  place-items: center;
  padding: 22px;
}

.pricing-dialog,
.badge-dialog,
.achievement-dialog,
.settings-dialog,
.legal-dialog {
  position: relative;
  z-index: 1;
  width: min(1180px, 100%);
  max-height: calc(100vh - 44px);
  overflow: auto;
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-md);
  background: var(--surface);
  box-shadow: var(--shadow-dialog);
}

.pricing-head,
.badge-head,
.settings-head {
  position: relative;
  padding: 28px 32px 24px;
  border-bottom: 1px solid var(--border);
}

.pricing-head h2,
.badge-head h2,
.settings-head h2,
.legal-dialog h2 {
  max-width: 820px;
  margin: 0;
  font-size: clamp(1.65rem, 3vw, 2.6rem);
}

.pricing-head p:not(.eyebrow),
.badge-head p:not(.eyebrow) {
  max-width: 760px;
  margin: 10px 0 0;
  color: var(--text-secondary);
}

.pricing-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  padding: 0 32px;
  border-bottom: 1px solid var(--border);
}

.pricing-card {
  position: relative;
  display: flex;
  min-width: 0;
  flex-direction: column;
  padding: 28px 20px;
  border-right: 1px solid var(--border);
}

.pricing-card:first-child {
  padding-left: 0;
}

.pricing-card:last-child {
  padding-right: 0;
  border-right: 0;
}

.pricing-card.featured {
  box-shadow: inset 0 3px 0 var(--accent);
  background: var(--accent-soft);
}

.pricing-card h3 {
  margin: 0;
  font-size: 1.35rem;
}

.plan-price {
  margin: 14px 0 0;
  color: var(--accent-ink);
  font-size: 1.9rem;
  font-weight: 740;
  letter-spacing: 0;
}

.plan-price span {
  color: var(--text-muted);
  font-size: 0.76rem;
  font-weight: 560;
}

.plan-copy {
  min-height: 68px;
  margin: 14px 0;
  color: var(--text-secondary);
  font-size: 0.82rem;
}

.pricing-card ul {
  display: grid;
  gap: 8px;
  margin: 0 0 22px;
  padding: 0;
  color: var(--text-secondary);
  font-size: 0.78rem;
  list-style: none;
}

.pricing-card li {
  padding-left: 13px;
  position: relative;
}

.pricing-card li::before {
  position: absolute;
  left: 0;
  color: var(--accent);
  content: "·";
}

.plan-badge {
  margin-bottom: 8px;
  color: var(--accent-ink);
  font-size: 0.66rem;
  font-weight: 720;
  text-transform: uppercase;
}

.plan-button {
  min-height: 40px;
  margin-top: auto;
  padding: 8px 10px;
}

.plan-button.subtle {
  background: transparent;
}

.pricing-card-institution {
  background: var(--surface-subtle);
}

.pricing-comparison {
  padding: 24px 32px;
}

.comparison-table {
  overflow-x: auto;
  border: 1px solid var(--border);
}

.comparison-table [role="row"] {
  display: grid;
  grid-template-columns: minmax(190px, 1.25fr) repeat(4, minmax(110px, 0.75fr));
  min-width: 760px;
  border-bottom: 1px solid var(--border);
}

.comparison-table [role="row"]:last-child {
  border-bottom: 0;
}

.comparison-table span,
.comparison-table strong {
  padding: 10px 12px;
  border-right: 1px solid var(--border);
  color: var(--text-secondary);
  font-size: 0.76rem;
}

.comparison-table [role="row"]:first-child {
  background: var(--surface-subtle);
}

.pricing-comparison > p {
  margin: 10px 0 0;
  color: var(--text-muted);
  font-size: 0.74rem;
}

.billing-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 18px 32px;
  border-top: 1px solid var(--border);
}

.billing-footer p {
  margin: 0;
  color: var(--text-muted);
  font-size: 0.76rem;
}

.billing-footer .plan-button {
  flex: 0 0 190px;
  margin: 0;
}

.badge-dialog {
  width: min(1040px, 100%);
}

.badge-overview {
  display: grid;
  grid-template-columns: auto auto minmax(200px, 1fr);
  gap: 28px;
  align-items: center;
  padding: 18px 32px;
  border-bottom: 1px solid var(--border);
}

.badge-overview span,
.badge-overview strong {
  display: block;
}

.badge-overview span {
  color: var(--text-muted);
  font-size: 0.66rem;
  text-transform: uppercase;
}

.badge-collection-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1px;
  padding: 1px;
  background: var(--border);
}

.badge-card {
  display: grid;
  grid-template-columns: 68px minmax(0, 1fr);
  min-width: 0;
  min-height: 126px;
  align-items: center;
  gap: 14px;
  overflow: hidden;
  background: var(--surface);
  padding: 16px;
}

.badge-card.locked {
  background: var(--surface-subtle);
  filter: grayscale(1);
  opacity: 0.66;
}

.badge-card h3 {
  margin: 4px 0;
  font-size: 0.92rem;
  line-height: 1.25;
}

.badge-card span,
.badge-card small {
  display: block;
  color: var(--text-muted);
  font-size: 0.66rem;
}

.badge-emblem {
  display: grid;
  width: 62px;
  height: 72px;
  place-content: center;
  clip-path: polygon(50% 0, 92% 20%, 84% 78%, 50% 100%, 16% 78%, 8% 20%);
  background: linear-gradient(150deg, var(--badge-a, var(--accent)), var(--badge-b, var(--accent-hover)));
  color: #fff;
  text-align: center;
}

.badge-emblem span,
.badge-emblem small {
  display: block;
  color: inherit;
}

.badge-emblem span {
  font-size: 1rem;
  font-weight: 780;
}

.badge-emblem small {
  font-size: 0.55rem;
}

.achievement-dialog {
  width: min(440px, 100%);
  padding: 34px;
  text-align: center;
}

.achievement-dialog .badge-emblem {
  margin: 12px auto 20px;
}

.achievement-dialog h2 {
  margin: 0;
  font-size: 1.55rem;
}

.achievement-dialog > p:not(.eyebrow) {
  margin: 10px 0 0;
  color: var(--text-secondary);
}

.achievement-actions {
  display: flex;
  justify-content: center;
  gap: 7px;
  margin-top: 24px;
}

.achievement-actions button {
  min-height: 38px;
  padding: 7px 11px;
}

.settings-dialog {
  width: min(780px, 100%);
}

.settings-body {
  display: grid;
  grid-template-columns: 170px minmax(0, 1fr);
  min-height: 420px;
}

.settings-tabs {
  display: flex;
  flex-direction: column;
  padding: 16px;
  border-right: 1px solid var(--border);
  background: var(--surface-subtle);
}

.settings-tabs button {
  min-height: 38px;
  border-color: transparent;
  background: transparent;
  padding: 7px 9px;
  text-align: left;
}

.settings-tabs button.active {
  border-color: var(--border);
  background: var(--surface);
  color: var(--accent-ink);
}

.settings-panel {
  display: none;
  padding: 28px;
}

.settings-panel.active {
  display: block;
}

.settings-panel h3 {
  margin: 0;
  font-size: 1.25rem;
}

.settings-panel > p {
  margin: 8px 0 22px;
  color: var(--text-secondary);
}

.settings-row {
  display: grid;
  grid-template-columns: 150px minmax(0, 1fr);
  gap: 20px;
  align-items: center;
  padding: 16px 0;
  border-top: 1px solid var(--border);
}

.segmented-control {
  grid-template-columns: repeat(3, 1fr);
}

.account-settings-card {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 14px;
  align-items: center;
  padding: 14px 0;
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.account-settings-card strong,
.account-settings-card span,
.account-settings-card small {
  display: block;
}

.account-settings-card span,
.account-settings-card small {
  color: var(--text-muted);
  font-size: 0.74rem;
}

.avatar-choice-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 6px;
}

.profile-avatar-choice {
  display: grid;
  min-height: 70px;
  place-items: center;
  padding: 6px;
}

.settings-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 7px;
}

.settings-actions button {
  min-height: 38px;
  padding: 7px 10px;
}

.settings-actions .secondary-danger {
  border-color: var(--danger);
  color: var(--danger);
}

.legal-dialog {
  width: min(700px, 100%);
  padding: 30px;
}

.legal-content {
  display: grid;
  gap: 14px;
  margin-top: 22px;
  color: var(--text-secondary);
  line-height: 1.65;
}

.legal-content p,
.legal-content ul {
  margin: 0;
}

.site-footer {
  display: flex;
  min-height: 45px;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 2px 16px;
  border-top: 1px solid var(--border);
  background: var(--surface-subtle);
  padding: 8px 18px;
}

.site-footer button {
  border-color: transparent;
  background: transparent;
  padding: 3px;
  color: var(--text-muted);
  font-size: 0.7rem;
}

/* Generated study content */
.generated-study-panel {
  display: grid;
  gap: 18px;
}

.generated-study-panel article {
  padding-top: 12px;
  border-top: 1px solid var(--border);
}

.flashcard-list,
.generated-quiz-list {
  display: grid;
  gap: 10px;
}

.flashcard-list > div,
.generated-quiz-list li {
  padding-bottom: 10px;
  border-bottom: 1px solid var(--border);
}

.flashcard-list p,
.generated-quiz-list p {
  margin: 4px 0 0;
  color: var(--text-muted);
}

.study-map {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1px;
  background: var(--border);
}

.study-map span {
  padding: 10px;
  background: var(--surface);
  font-size: 0.78rem;
}

.study-map .central {
  grid-column: 1 / -1;
  border-left: 3px solid var(--accent);
  font-weight: 680;
}

.summary-signals {
  display: flex;
  flex-wrap: wrap;
  gap: 5px 14px;
  margin-top: 12px;
  color: var(--text-muted);
  font-size: 0.7rem;
}

.instant-card-lab-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 18px;
  margin-bottom: 14px;
}

.instant-card-lab-head p,
.instant-card-note {
  margin: 5px 0 0;
  color: var(--text-muted);
  font-size: 0.74rem;
}

.instant-card-lab-head button {
  flex: 0 0 auto;
  min-height: 34px;
  padding: 6px 9px;
  font-size: 0.7rem;
}

.task-box {
  display: inline-grid;
  width: 16px;
  height: 16px;
  place-items: center;
  margin-right: 7px;
  border: 1px solid var(--border-strong);
  color: var(--accent-ink);
  font-size: 0.65rem;
}

.invite-code-card,
.centre-code-card {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 7px;
}

.invite-code-card code,
.centre-code-card code {
  padding: 4px 6px;
  border: 1px solid var(--border);
  background: var(--surface-subtle);
  font-size: 0.76rem;
}

.class-card-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  grid-column: 1 / -1;
}

.class-card-actions button,
.invite-code-card button {
  min-height: 31px;
  padding: 5px 7px;
  font-size: 0.68rem;
}

.teacher-assignment-draft {
  margin-bottom: 18px;
  padding: 12px 14px;
  border-left: 3px solid var(--accent);
  background: var(--surface-subtle);
}

.teacher-assignment-draft p {
  margin: 4px 0 0;
  color: var(--text-secondary);
  font-size: 0.76rem;
}

.topic-insight-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--border);
}

.topic-insight-card {
  min-width: 0;
  background: var(--surface);
  padding: 16px;
}

.topic-insight-card h4 {
  margin: 4px 0 10px;
  font-size: 0.92rem;
}

.topic-insight-card > strong {
  font-size: 1.3rem;
}

.topic-insight-card p,
.topic-insight-card ul {
  color: var(--text-muted);
  font-size: 0.72rem;
}

.topic-insight-card ul {
  padding-left: 17px;
}

.topic-insight-card button,
.watchlist-item button {
  min-height: 32px;
  padding: 5px 8px;
  font-size: 0.7rem;
}

.avatar-choice-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.avatar-choice-grid > button {
  display: grid;
  min-width: 0;
  place-items: center;
  gap: 5px;
  padding: 8px 4px;
}

.avatar-choice-grid > button strong {
  max-width: 100%;
  font-size: 0.68rem;
  font-weight: 630;
  line-height: 1.2;
  text-align: center;
}

.avatar-choice-grid > button.active {
  border-color: var(--accent);
  background: var(--accent-soft);
}

.mobile-notes-button,
.mobile-sidebar-close {
  display: none;
}

.compact-density .notes-sidebar-context > section {
  padding-block: 11px;
}

.compact-density .note-card {
  padding-block: 11px;
}

.compact-density .writing-pane,
.compact-density .study-pane {
  padding-block: 20px;
}

@media (max-width: 1220px) {
  :root {
    --topbar-height: 96px;
  }

  .app-shell {
    grid-template-columns: 220px 270px minmax(0, 1fr);
  }

  .app-topbar {
    grid-template-columns: minmax(170px, 1fr) auto minmax(350px, 1fr);
    padding-inline: 14px;
  }

  .account-status,
  .topbar-date {
    display: none;
  }

  .topbar-clock {
    border-right: 0;
    padding-right: 0;
  }

  .topbar-utility-button,
  .secondary-account-button,
  .primary-account-button {
    padding-inline: 7px;
  }

  .editor-workbench {
    grid-template-columns: 1fr;
  }

  .writing-pane {
    border-right: 0;
    border-bottom: 1px solid var(--border);
  }

  .neat-questions-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .revision-progress-stack {
    grid-template-columns: 1fr;
  }

  .mastery-map-grid {
    grid-template-columns: repeat(8, 1fr);
  }

  .contact-credibility-band {
    grid-template-columns: repeat(2, 1fr);
  }

  .contact-credibility-band article:nth-child(3) {
    padding-left: 0;
    border-left: 0;
  }

  .contact-credibility-band article:nth-child(n + 3) {
    padding-top: 18px;
    border-top: 1px solid var(--border);
  }
}

@media (max-width: 1024px) {
  .landing-nav {
    grid-template-columns: auto 1fr;
  }

  .landing-primary-links {
    grid-column: 1 / -1;
    grid-row: 2;
    justify-content: flex-start;
    overflow-x: auto;
    padding-bottom: 8px;
  }

  .landing-nav-actions {
    justify-content: flex-end;
  }

  .landing-hero,
  .landing-schools {
    grid-template-columns: 1fr;
  }

  .landing-hero {
    min-height: 0;
    padding-block: 56px;
  }

  .landing-demo-card {
    max-width: 620px;
  }

  .landing-schools {
    gap: 34px;
  }

  .landing-plan-row {
    grid-template-columns: repeat(2, 1fr);
  }

  .landing-plan-row article:nth-child(2) {
    border-right: 0;
  }

  .landing-plan-row article:nth-child(-n + 2) {
    border-bottom: 1px solid var(--border);
  }

  .landing-trust-faq {
    grid-template-columns: 1fr;
    gap: 36px;
  }

  .app-topbar {
    grid-template-columns: minmax(130px, 1fr) auto minmax(330px, 1fr);
  }

  .topbar-product span:not(.brand-mark) {
    display: none;
  }

  .topbar-utilities > .topbar-utility-button[data-app-section="contact"] {
    display: none;
  }

  .revision-hero {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .revision-summary-grid {
    max-width: 720px;
  }

  .student-class-head,
  .contact-layout,
  .contact-future-grid {
    grid-template-columns: 1fr;
    gap: 30px;
  }

  .join-class-form {
    padding: 18px 0 0;
    border-top: 1px solid var(--border);
    border-left: 0;
  }

  .student-dashboard-grid {
    grid-template-columns: 1fr 1fr;
  }

  .student-action-card.primary-path {
    grid-column: 1 / -1;
    grid-row: auto;
    padding-right: 0;
    border-right: 0;
  }

  .student-action-card:nth-child(even) {
    padding-left: 0;
    padding-right: 22px;
    border-left: 0;
  }

  .student-action-card:nth-child(odd):not(.primary-path) {
    padding-left: 22px;
    padding-right: 0;
    border-left: 1px solid var(--border);
  }

  .teacher-hero,
  .teacher-upgrade-panel,
  .teacher-dashboard-grid,
  .teacher-management-grid {
    grid-template-columns: 1fr;
    gap: 28px;
  }

  .teacher-preview-card {
    max-width: 560px;
  }

  .teacher-metric-grid {
    grid-template-columns: repeat(3, 1fr);
  }

  .teacher-metric-grid article:nth-child(3) {
    border-right: 0;
  }

  .teacher-metric-grid article:nth-child(n + 4) {
    border-top: 1px solid var(--border);
  }

  .contact-hero {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .contact-email-pill {
    justify-self: start;
  }

  .pricing-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .pricing-card:nth-child(2) {
    border-right: 0;
  }

  .pricing-card:nth-child(-n + 2) {
    border-bottom: 1px solid var(--border);
  }

  .pricing-card:nth-child(3) {
    padding-left: 0;
  }

  .pricing-card:nth-child(4) {
    padding-right: 0;
  }

  .badge-collection-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 820px) {
  :root {
    --topbar-height: 132px;
  }

  .app-shell {
    display: block;
    height: auto;
    min-height: calc(100vh - 45px);
    overflow: visible;
  }

  .app-topbar {
    position: sticky;
    top: 0;
    z-index: 20;
    display: grid;
    grid-template-columns: 1fr auto;
    grid-template-rows: 48px 40px 42px;
    grid-template-areas:
      "brand context"
      "tabs tabs"
      "utilities utilities";
    gap: 0 8px;
    min-height: var(--topbar-height);
    padding: 0 12px;
  }

  .topbar-center {
    justify-self: start;
  }

  .topbar-context {
    justify-self: end;
  }

  .topbar-clock {
    display: grid;
  }

  .topbar-time {
    font-size: 0.92rem;
  }

  .mobile-notes-button {
    display: inline-grid;
    min-height: 30px;
    place-items: center;
    padding: 4px 7px;
    font-size: 0.68rem;
  }

  .revision-mode .mobile-notes-button,
  .contact-mode .mobile-notes-button {
    display: none;
  }

  .topbar-section-switch {
    width: 100%;
  }

  .topbar-utilities {
    width: 100%;
    overflow-x: auto;
    justify-content: flex-start;
    padding-block: 4px 6px;
    scrollbar-width: none;
  }

  .topbar-utilities::-webkit-scrollbar {
    display: none;
  }

  .topbar-utility-button,
  .secondary-account-button,
  .primary-account-button,
  .theme-toggle {
    flex: 0 0 auto;
  }

  .sidebar {
    position: fixed;
    inset: 0 auto 0 0;
    z-index: 40;
    display: block;
    width: min(350px, 92vw);
    height: 100vh;
    border-right: 1px solid var(--border-strong);
    box-shadow: var(--shadow-dialog);
    transform: translateX(-102%);
    transition: transform 220ms ease;
  }

  .app-shell.mobile-sidebar-open::after {
    position: fixed;
    inset: 0;
    z-index: 35;
    background: rgba(13, 25, 22, 0.48);
    content: "";
  }

  .app-shell.mobile-sidebar-open .sidebar {
    transform: translateX(0);
  }

  .sidebar-tools {
    justify-content: space-between;
  }

  .mobile-sidebar-close {
    display: inline-grid;
    min-height: 34px;
    place-items: center;
    padding: 5px 8px;
    border-color: transparent;
    background: transparent;
    font-size: 0.72rem;
  }

  .notes-column {
    height: 270px;
    border-right: 0;
    border-bottom: 1px solid var(--border-strong);
  }

  .notes-list {
    height: calc(100% - 68px);
  }

  .column-header {
    min-height: 68px;
  }

  .editor {
    overflow: visible;
  }

  .editor-masthead,
  .editor-actionbar,
  .learning-flow,
  .writing-pane,
  .study-pane {
    padding-inline: 18px;
  }

  .editor-actionbar {
    align-items: flex-start;
    flex-direction: column;
  }

  .editor-workbench {
    min-height: 0;
  }

  #note-body {
    min-height: 440px;
  }

  .revision-view,
  .contact-view {
    overflow: visible;
  }

  .revision-hero,
  .student-class-panel,
  .student-dashboard-panel,
  .neat-questions-section,
  .revision-stage,
  .revision-progress-section,
  .teacher-mode-panel,
  .contact-hero,
  .contact-layout,
  .contact-credibility-band,
  .contact-future-grid {
    width: min(100% - 28px, var(--content));
  }

  .revision-card-grid {
    grid-template-columns: 1fr;
  }

  .teacher-report-grid,
  .teacher-upgrade-grid {
    grid-template-columns: 1fr;
  }

  .settings-body {
    grid-template-columns: 1fr;
  }

  .settings-tabs {
    flex-direction: row;
    overflow-x: auto;
    border-right: 0;
    border-bottom: 1px solid var(--border);
  }

  .settings-tabs button {
    flex: 1 0 auto;
    text-align: center;
  }
}

@media (max-width: 620px) {
  .landing-nav,
  .landing-hero,
  .landing-workflow,
  .landing-benefits-grid,
  .landing-schools,
  .landing-pricing-preview,
  .landing-trust-faq {
    width: min(100% - 28px, var(--content));
  }

  .landing-nav {
    grid-template-columns: 1fr;
    gap: 10px;
    padding-block: 12px;
  }

  .landing-nav-actions {
    grid-row: 2;
    justify-content: flex-start;
    overflow-x: auto;
  }

  .landing-primary-links {
    grid-row: 3;
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    width: 100%;
    overflow: visible;
    padding-bottom: 0;
  }

  .landing-primary-links button {
    min-width: 0;
    padding-inline: 4px;
    text-align: left;
  }

  .landing-hero {
    gap: 30px;
    padding-block: 42px;
  }

  .landing-hero h1 {
    font-size: clamp(2.3rem, 12vw, 3.2rem);
  }

  .landing-hero-actions {
    align-items: stretch;
    flex-direction: column;
  }

  .landing-workflow,
  .landing-benefits-grid,
  .school-readiness-grid,
  .landing-plan-row {
    grid-template-columns: 1fr;
  }

  .landing-workflow {
    gap: 20px;
  }

  .auth-product-panel {
    padding: 20px;
  }

  .auth-product-panel h1 {
    max-width: 330px;
    margin: 18px 0 0;
    font-size: 1.9rem;
    line-height: 1.05;
  }

  .auth-copy {
    display: none;
  }

  .auth-card {
    padding: 22px 20px 24px;
  }

  .auth-card h2 {
    max-width: 290px;
    margin-bottom: 12px;
    font-size: 1.45rem;
  }

  .auth-tabs {
    margin-bottom: 14px;
  }

  .landing-benefits-grid > div,
  .landing-benefits-grid > div + div {
    padding: 0;
    border-left: 0;
  }

  .landing-benefits-grid > div + div {
    margin-top: 42px;
    padding-top: 42px;
    border-top: 1px solid var(--border);
  }

  .school-readiness-grid article:nth-child(even) {
    padding-left: 0;
    border-left: 0;
  }

  .landing-plan-row article,
  .landing-plan-row article:nth-child(2) {
    border-right: 0;
    border-bottom: 1px solid var(--border);
  }

  .landing-plan-row article:last-child {
    border-bottom: 0;
  }

  .auth-page {
    align-items: start;
    padding: 10px;
  }

  .auth-shell {
    grid-template-columns: 1fr;
    max-height: calc(100vh - 20px);
  }

  .auth-product-panel {
    min-height: 0;
    padding: 24px;
    border-right: 0;
    border-bottom: 1px solid var(--border);
  }

  .auth-product-panel h1 {
    margin: 28px 0 10px;
    font-size: 2.25rem;
  }

  .auth-proof {
    display: none;
  }

  .auth-card {
    padding: 28px 24px;
  }

  .topbar-context .topbar-clock {
    display: none;
  }

  .revision-mode .app-topbar,
  .contact-mode .app-topbar {
    grid-template-columns: 1fr;
    grid-template-areas:
      "brand"
      "tabs"
      "utilities";
  }

  .revision-mode .topbar-context,
  .contact-mode .topbar-context {
    display: none;
  }

  .topbar-utilities {
    overflow: visible;
  }

  .topbar-utilities > .topbar-utility-button[data-app-section="contact"] {
    display: none;
  }

  .topbar-utilities .account-actions {
    margin-left: auto;
  }

  .account-profile-button {
    width: 34px;
    padding: 3px;
  }

  .account-profile-button .profile-copy {
    display: none;
  }

  .topbar-product strong {
    font-size: 0.92rem;
  }

  .topbar-section-switch button {
    padding-inline: 4px;
    font-size: 0.72rem;
  }

  .account-profile-button {
    max-width: 150px;
  }

  .editor-masthead {
    grid-template-columns: 1fr;
    gap: 14px;
  }

  .learning-flow {
    grid-template-columns: repeat(2, 1fr);
    padding-block: 4px;
  }

  .revision-generator-grid,
  .instant-card-grid,
  .study-map,
  .revision-summary-grid,
  .student-dashboard-grid,
  .neat-questions-grid,
  .neat-quiz-options,
  .revision-progress-card,
  .revision-retention-grid,
  .contact-credibility-band,
  .future-support-grid,
  .pricing-grid,
  .badge-collection-grid {
    grid-template-columns: 1fr;
  }

  .revision-summary-card + .revision-summary-card,
  .student-action-card:nth-child(odd):not(.primary-path),
  .retention-card + .retention-card,
  .contact-credibility-band article + article,
  .future-support-grid article:nth-child(even) {
    padding-left: 0;
    border-left: 0;
  }

  .future-support-grid button:nth-child(even) {
    padding-left: 0;
    border-left: 0;
  }

  .revision-summary-card,
  .revision-summary-card + .revision-summary-card {
    padding: 12px 0;
  }

  .student-action-card,
  .student-action-card:nth-child(even),
  .student-action-card:nth-child(odd):not(.primary-path),
  .student-action-card.primary-path {
    padding: 15px 0;
    border-left: 0;
    border-right: 0;
  }

  .student-dashboard-head,
  .topic-packs-head,
  .revision-stage-head,
  .neat-questions-head,
  .teacher-section-head {
    align-items: stretch;
    flex-direction: column;
  }

  .student-dashboard-head > button,
  .neat-questions-actions button {
    width: 100%;
  }

  .neat-questions-actions {
    align-items: stretch;
    flex-direction: column;
  }

  .neat-quiz-empty,
  .neat-quiz-complete {
    grid-template-columns: 1fr;
  }

  .neat-quiz-player {
    padding: 18px;
  }

  .neat-quiz-player-head {
    flex-direction: column;
  }

  .neat-quiz-stats {
    grid-template-columns: repeat(2, 1fr);
    width: 100%;
  }

  .topic-packs-head > p {
    text-align: left;
  }

  .revision-card-face {
    padding: 18px;
  }

  .revision-progress-card {
    display: grid;
  }

  .revision-course-progress {
    padding-left: 0;
    border-top: 1px solid var(--border);
    border-left: 0;
  }

  .mastery-map-grid {
    grid-template-columns: repeat(4, 1fr);
  }

  .retention-card,
  .retention-card + .retention-card {
    padding: 14px 0;
    border-top: 1px solid var(--border);
  }

  .student-class-context,
  .student-class-card,
  .teacher-assignment-card,
  .class-card {
    grid-template-columns: 1fr;
  }

  .contact-trust-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
  }

  .contact-credibility-band article {
    padding: 14px 0;
    border-top: 1px solid var(--border);
  }

  .contact-form-meta,
  .billing-footer {
    align-items: flex-start;
    flex-direction: column;
  }

  .contact-submit-button,
  .billing-footer .plan-button {
    width: 100%;
    flex-basis: auto;
  }

  .pricing-modal,
  .badge-modal,
  .achievement-modal,
  .settings-modal,
  .legal-modal {
    padding: 8px;
  }

  .pricing-dialog,
  .badge-dialog,
  .settings-dialog,
  .legal-dialog {
    max-height: calc(100vh - 16px);
  }

  .pricing-head,
  .badge-head,
  .settings-head,
  .pricing-comparison,
  .billing-footer,
  .legal-dialog {
    padding: 22px;
  }

  .pricing-grid {
    padding-inline: 22px;
  }

  .pricing-card,
  .pricing-card:first-child,
  .pricing-card:nth-child(3),
  .pricing-card:last-child {
    padding: 22px 0;
    border-right: 0;
    border-bottom: 1px solid var(--border);
  }

  .pricing-card:last-child {
    border-bottom: 0;
  }

  .badge-overview {
    grid-template-columns: 1fr 1fr;
    padding-inline: 22px;
  }

  .badge-overview-meter {
    grid-column: 1 / -1;
  }

  .settings-panel {
    padding: 22px;
  }

  .settings-row {
    grid-template-columns: 1fr;
    gap: 8px;
  }

  .avatar-choice-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .site-footer {
    justify-content: flex-start;
  }
}

@media (max-width: 390px) {
  .topbar-utilities {
    gap: 2px;
  }

  .topbar-utility-button,
  .secondary-account-button,
  .primary-account-button {
    padding-inline: 6px;
    font-size: 0.68rem;
  }

  .topbar-product .brand-mark {
    width: 30px;
    height: 30px;
  }

  .revision-hero-copy h2,
  .contact-hero h2,
  .teacher-hero h2,
  .teacher-upgrade-panel h2 {
    font-size: 2.15rem;
  }

  .revision-hero,
  .student-class-panel,
  .student-dashboard-panel,
  .neat-questions-section,
  .revision-stage,
  .revision-progress-section,
  .teacher-mode-panel,
  .contact-hero,
  .contact-layout,
  .contact-credibility-band,
  .contact-future-grid {
    width: calc(100% - 20px);
  }

  .mastery-map-grid {
    grid-template-columns: repeat(3, 1fr);
  }

  .contact-trust-grid {
    grid-template-columns: 1fr;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

/* Production relaunch: focused Notes workspace and responsive student navigation */
.editor-actionbar {
  position: relative;
}

.editor-actionbar > .revision-action-primary {
  flex: 0 0 auto;
  min-height: 36px;
  border-color: var(--accent);
  background: var(--accent);
  color: var(--on-accent);
  padding-inline: 13px;
}

.editor-control-groups {
  display: flex;
  align-items: center;
  gap: 6px;
}

.editor-control-menu {
  position: relative;
}

.editor-control-menu > summary {
  min-height: 34px;
  border: 1px solid transparent;
  border-radius: var(--radius-control);
  cursor: pointer;
  list-style: none;
  padding: 7px 10px;
  color: var(--text-secondary);
  font-size: 0.72rem;
  font-weight: 700;
}

.editor-control-menu > summary::-webkit-details-marker {
  display: none;
}

.editor-control-menu > summary::after {
  margin-left: 7px;
  color: var(--text-muted);
  content: "+";
}

.editor-control-menu[open] > summary {
  border-color: var(--border);
  background: var(--surface);
  color: var(--text);
}

.editor-control-menu[open] > summary::after {
  content: "−";
}

.editor-control-menu > .format-toolbar,
.editor-control-menu > .editor-toolbar {
  position: absolute;
  top: calc(100% + 7px);
  right: 0;
  z-index: 18;
  display: grid;
  width: 210px;
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-dialog);
  background: var(--surface);
  padding: 7px;
}

.editor-control-menu > .format-toolbar button,
.editor-control-menu > .editor-toolbar button {
  width: 100%;
  min-height: 34px;
  padding: 7px 9px;
  text-align: left;
}

.editor-toolbar button span {
  float: right;
  color: var(--accent-ink);
  font-size: 0.62rem;
}

.editor-workbench {
  grid-template-columns: minmax(0, 1fr);
  min-height: 0;
}

.writing-pane {
  border-right: 0;
}

.study-pane {
  display: block;
  border-top: 1px solid var(--border-strong);
  background: var(--surface-subtle);
  padding-block: 0;
}

.study-pane > details > summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  min-height: 60px;
  cursor: pointer;
  list-style: none;
  color: var(--text);
  font-size: 0.78rem;
  font-weight: 760;
}

.study-pane > details > summary::-webkit-details-marker {
  display: none;
}

.study-pane > details > summary::after {
  color: var(--accent-ink);
  content: "Open";
  font-size: 0.68rem;
}

.study-pane > details[open] > summary::after {
  content: "Close";
}

.study-pane > details > summary small {
  margin-left: auto;
  color: var(--text-muted);
  font-size: 0.66rem;
  font-weight: 500;
}

.study-pane-content {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 28px;
  padding-bottom: 34px;
}

.study-pane-content .insights-panel,
.study-pane-content .preview-wrap {
  grid-column: 1 / -1;
}

@media (max-width: 820px) {
  :root {
    --topbar-height: 96px;
  }

  .app-shell {
    padding-bottom: calc(62px + env(safe-area-inset-bottom));
  }

  .app-topbar,
  .revision-mode .app-topbar,
  .contact-mode .app-topbar {
    grid-template-columns: minmax(0, 1fr) auto;
    grid-template-rows: 52px 42px;
    grid-template-areas:
      "brand context"
      "utilities utilities";
    min-height: var(--topbar-height);
    padding-inline: 12px;
  }

  .topbar-center {
    justify-self: start;
  }

  .topbar-context {
    display: flex;
  }

  .account-status,
  .topbar-clock {
    display: none;
  }

  .topbar-utilities {
    display: flex;
    width: 100%;
    min-width: 0;
    justify-content: flex-end;
    overflow: visible;
    padding: 3px 0 5px;
  }

  .topbar-plan-message,
  .topbar-utilities > [data-app-section="contact"],
  .topbar-utilities > [data-app-section="teacher"] {
    display: none;
  }

  .topbar-section-switch {
    position: fixed;
    right: 0;
    bottom: 0;
    left: 0;
    z-index: 32;
    display: grid;
    grid-template-columns: repeat(5, minmax(0, 1fr));
    width: 100%;
    height: calc(62px + env(safe-area-inset-bottom));
    border-top: 1px solid var(--border-strong);
    box-shadow: 0 -8px 24px rgba(13, 31, 27, 0.08);
    background: color-mix(in srgb, var(--surface) 96%, transparent);
    padding: 0 5px env(safe-area-inset-bottom);
  }

  .topbar-section-switch button {
    min-width: 0;
    min-height: 58px;
    border: 0;
    border-top: 3px solid transparent;
    border-radius: 0;
    padding: 7px 2px 5px;
    font-size: 0.68rem;
  }

  .topbar-section-switch button.active {
    border-top-color: var(--accent);
    border-bottom-color: transparent;
    background: var(--accent-soft);
  }

  .topbar-section-switch button.locked-section::after {
    display: block;
    margin-top: 1px;
    content: "Pro";
    font-size: 0.52rem;
  }

  .today-session,
  .student-home-sections,
  .study-pane-content {
    grid-template-columns: 1fr;
  }

  .study-pane-content .insights-panel,
  .study-pane-content .preview-wrap {
    grid-column: auto;
  }

  .mistake-journal-head,
  .mistake-journal-list article {
    align-items: stretch;
    grid-template-columns: 1fr;
  }

  .editor-control-menu > .format-toolbar,
  .editor-control-menu > .editor-toolbar {
    width: min(230px, calc(100vw - 30px));
  }
}

@media (max-width: 520px) {
  :root {
    --topbar-height: 58px;
  }

  .app-topbar,
  .revision-mode .app-topbar,
  .contact-mode .app-topbar {
    grid-template-columns: minmax(0, 1fr) auto;
    grid-template-rows: 56px;
    grid-template-areas: "brand utilities";
  }

  .topbar-context,
  .topbar-utilities > #open-plans-button,
  .topbar-utilities > #settings-button,
  .topbar-utilities > .theme-toggle,
  .topbar-utilities .secondary-account-button {
    display: none;
  }

  .topbar-product > div > span {
    display: none;
  }

  .primary-account-button {
    min-height: 34px;
    padding-inline: 8px;
  }

  .editor-actionbar {
    align-items: center;
    flex-direction: row;
    padding-inline: 14px;
  }

  .editor-control-groups {
    margin-left: auto;
  }

  .study-pane > details > summary small {
    display: none;
  }
}

.onboarding-modal {
  position: fixed;
  inset: 0;
  z-index: 110;
  display: grid;
  place-items: center;
  padding: 22px;
}

.auth-text-action {
  width: max-content;
  min-height: 36px;
  padding: 0;
  border: 0;
  background: transparent;
  color: var(--accent-ink);
  font-weight: 700;
  text-decoration: underline;
  text-underline-offset: 3px;
}

.auth-text-action:hover {
  color: var(--text);
}

.auth-form-intro {
  margin: 0 0 16px;
  color: var(--muted);
  line-height: 1.55;
}

.account-security-tools,
.account-danger-zone {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-top: 20px;
  padding: 16px;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
}

.account-security-tools[hidden],
.account-danger-zone[hidden] {
  display: none;
}

.account-security-tools div,
.account-danger-zone div {
  display: grid;
  gap: 4px;
}

.account-security-tools span,
.account-danger-zone span {
  color: var(--muted);
  font-size: 0.875rem;
  line-height: 1.45;
}

.account-danger-zone {
  border-color: color-mix(in srgb, var(--danger) 40%, var(--border));
}

@media (max-width: 680px) {
  .account-security-tools,
  .account-danger-zone {
    align-items: stretch;
    flex-direction: column;
  }
}

.onboarding-modal[hidden] {
  display: none;
}

.onboarding-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(8, 24, 20, 0.58);
  backdrop-filter: blur(8px);
}

.onboarding-dialog {
  position: relative;
  display: grid;
  width: min(760px, 100%);
  max-height: min(760px, calc(100vh - 44px));
  overflow: auto;
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-dialog);
  box-shadow: var(--shadow-dialog);
  background: var(--surface);
}

.onboarding-head {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 24px;
  padding: 26px 30px 18px;
}

.onboarding-head h2 {
  margin: 4px 0 0;
  font-size: 1.65rem;
}

.onboarding-head > span {
  color: var(--text-muted);
  font-size: 0.72rem;
  font-variant-numeric: tabular-nums;
}

.onboarding-progress {
  height: 3px;
  background: var(--surface-muted);
}

.onboarding-progress span {
  display: block;
  width: 16.66%;
  height: 100%;
  background: var(--accent);
  transition: width 220ms ease;
}

.onboarding-step {
  min-height: 390px;
  padding: 34px 30px 20px;
}

.onboarding-step h3 {
  max-width: 600px;
  margin: 6px 0 10px;
  font-size: clamp(1.65rem, 4vw, 2.4rem);
  line-height: 1.08;
}

.onboarding-step > p:not(.eyebrow) {
  max-width: 620px;
  margin: 0 0 28px;
  color: var(--text-secondary);
}

.choice-card-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
}

.choice-card-grid-two {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.choice-card-grid label,
.onboarding-topic-grid label {
  position: relative;
  display: block;
  cursor: pointer;
}

.choice-card-grid input,
.onboarding-topic-grid input {
  position: absolute;
  width: 1px;
  height: 1px;
  opacity: 0;
}

.choice-card-grid label > span,
.onboarding-topic-grid label > span {
  display: grid;
  align-content: start;
  min-height: 116px;
  border: 1px solid var(--border);
  border-radius: var(--radius-card);
  background: var(--surface-subtle);
  padding: 18px;
}

.choice-card-grid input:checked + span,
.onboarding-topic-grid input:checked + span {
  border-color: var(--accent);
  box-shadow: inset 3px 0 0 var(--accent);
  background: var(--accent-soft);
}

.choice-card-grid input:focus-visible + span,
.onboarding-topic-grid input:focus-visible + span {
  outline: 3px solid var(--focus-ring);
  outline-offset: 2px;
}

.choice-card-grid small,
.onboarding-topic-grid small,
.qualification-confirmation small,
.onboarding-finish-grid span {
  display: block;
  margin-top: 7px;
  color: var(--text-muted);
  font-size: 0.72rem;
  line-height: 1.45;
}

.qualification-confirmation {
  display: flex;
  max-width: 560px;
  align-items: center;
  gap: 18px;
  border: 1px solid var(--accent);
  background: var(--accent-soft);
  padding: 20px;
}

.qualification-confirmation > span {
  display: grid;
  width: 54px;
  height: 54px;
  place-items: center;
  background: var(--accent);
  color: var(--on-accent);
  font-weight: 800;
}

.onboarding-step > label {
  display: block;
  margin: 18px 0 6px;
  color: var(--text-secondary);
  font-size: 0.74rem;
  font-weight: 700;
}

.onboarding-step > label span {
  color: var(--text-muted);
  font-weight: 500;
}

.onboarding-step select,
.onboarding-step textarea {
  width: min(100%, 560px);
}

.onboarding-step textarea {
  min-height: 96px;
  resize: vertical;
}

.onboarding-topic-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 8px;
  max-height: 300px;
  overflow: auto;
  padding-right: 4px;
}

.onboarding-topic-grid label > span {
  min-height: 84px;
  padding: 13px;
}

.onboarding-finish-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 10px;
}

.onboarding-finish-grid button {
  min-height: 100px;
  background: var(--surface-subtle);
  padding: 18px;
  text-align: left;
}

.onboarding-finish-grid .onboarding-primary {
  border-color: var(--accent);
  background: var(--accent);
  color: var(--on-accent);
}

.onboarding-primary span {
  color: color-mix(in srgb, var(--on-accent) 78%, transparent);
}

.onboarding-actions {
  display: flex;
  min-height: 68px;
  align-items: center;
  justify-content: space-between;
  border-top: 1px solid var(--border);
  padding: 12px 30px;
}

.onboarding-actions button {
  min-width: 100px;
}

#onboarding-message {
  min-height: 20px;
  margin: 0 30px;
}

@media (max-width: 680px) {
  .onboarding-modal {
    align-items: end;
    padding: 0;
  }

  .onboarding-dialog {
    width: 100%;
    max-height: 94vh;
    border-radius: var(--radius-dialog) var(--radius-dialog) 0 0;
  }

  .onboarding-head,
  .onboarding-step,
  .onboarding-actions {
    padding-inline: 20px;
  }

  .choice-card-grid,
  .choice-card-grid-two,
  .onboarding-topic-grid,
  .onboarding-finish-grid {
    grid-template-columns: 1fr;
  }

  .choice-card-grid label > span {
    min-height: 84px;
  }

  .onboarding-step {
    min-height: 430px;
  }
}

/* Relaunch design consolidation: search, focus study, teacher tools, provenance and public topics */
.sr-only {
  position: absolute !important;
  width: 1px !important;
  height: 1px !important;
  overflow: hidden !important;
  clip: rect(0, 0, 0, 0) !important;
  white-space: nowrap !important;
  clip-path: inset(50%) !important;
}

.topbar-search-button {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

kbd {
  min-width: 20px;
  border: 1px solid var(--border);
  border-bottom-color: var(--border-strong);
  border-radius: 3px;
  background: var(--surface-subtle);
  padding: 2px 5px;
  color: var(--text-muted);
  font-family: var(--font-sans);
  font-size: 0.68rem;
  font-weight: 650;
  line-height: 1.3;
  text-align: center;
}

.global-search-modal {
  position: fixed;
  inset: 0;
  z-index: 120;
  display: grid;
  place-items: start center;
  padding: min(13vh, 120px) 20px 20px;
}

.global-search-modal[hidden] {
  display: none;
}

.global-search-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(8, 20, 17, 0.58);
  backdrop-filter: blur(6px);
}

.global-search-dialog {
  position: relative;
  display: grid;
  width: min(720px, 100%);
  max-height: min(680px, calc(100vh - 80px));
  overflow: hidden;
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-dialog);
  box-shadow: var(--shadow-dialog);
  background: var(--surface);
  animation: search-dialog-in 180ms cubic-bezier(.2, .8, .2, 1) both;
}

@keyframes search-dialog-in {
  from { opacity: 0; transform: translateY(-8px) scale(.99); }
  to { opacity: 1; transform: translateY(0) scale(1); }
}

.global-search-head {
  display: flex;
  align-items: start;
  justify-content: space-between;
  gap: 24px;
  padding: 22px 24px 16px;
}

.global-search-head h2 {
  margin: 0;
  font-size: 1.35rem;
}

.global-search-field {
  position: relative;
  display: block;
  margin: 0 24px;
}

.global-search-field input {
  min-height: 52px;
  padding: 12px 58px 12px 14px;
  border-color: var(--accent);
  font-size: 1rem;
}

.global-search-field > kbd {
  position: absolute;
  top: 15px;
  right: 12px;
}

.global-search-results {
  min-height: 190px;
  max-height: 410px;
  overflow-y: auto;
  margin-top: 12px;
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  padding: 6px;
}

.global-search-result {
  display: grid;
  grid-template-columns: 82px minmax(0, 1fr) auto;
  width: 100%;
  min-height: 62px;
  align-items: center;
  gap: 14px;
  border-color: transparent;
  background: transparent;
  padding: 9px 12px;
  text-align: left;
}

.global-search-result:hover,
.global-search-result.selected {
  border-color: var(--border);
  background: var(--accent-soft);
  color: var(--text);
}

.global-search-result-type,
.global-search-result-action {
  color: var(--text-muted);
  font-size: 0.7rem;
  font-weight: 720;
  text-transform: uppercase;
}

.global-search-result strong,
.global-search-result small {
  display: block;
}

.global-search-result small {
  margin-top: 3px;
  overflow: hidden;
  color: var(--text-muted);
  font-size: 0.75rem;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.global-search-empty {
  display: grid;
  min-height: 175px;
  place-content: center;
  padding: 28px;
  text-align: center;
}

.global-search-empty p {
  max-width: 440px;
  margin: 7px 0 0;
  color: var(--text-muted);
}

.global-search-help {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 20px;
  padding: 10px 24px 12px;
  color: var(--text-muted);
  font-size: 0.7rem;
}

.global-search-help span {
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.revision-focus-active {
  display: block;
  min-height: 100vh;
  padding: 0;
}

.revision-focus-active .app-topbar,
.revision-focus-active .sidebar,
.revision-focus-active .notes-column,
.revision-focus-active .editor,
.revision-focus-active .revision-hero,
.revision-focus-active .student-revision-section:not(.revision-stage),
.revision-focus-active .teacher-mode-panel,
body.revision-focus-mode > .site-footer {
  display: none !important;
}

.revision-focus-active .revision-view {
  height: 100vh;
  overflow: auto;
  background: var(--canvas);
}

.revision-focus-active .revision-stage {
  width: min(980px, calc(100% - 40px));
  min-height: 100vh;
  margin-inline: auto;
  padding: 42px 0 72px;
  border: 0;
}

.revision-focus-active .revision-stage-head {
  position: sticky;
  top: 0;
  z-index: 3;
  align-items: center;
  border-bottom: 1px solid var(--border);
  background: color-mix(in srgb, var(--canvas) 96%, transparent);
  padding: 14px 0;
  backdrop-filter: blur(8px);
}

.revision-focus-active .revision-stage-head > div:first-child > p:last-child {
  display: none;
}

.revision-focus-active .revision-card-grid {
  grid-template-columns: 1fr;
  width: min(760px, 100%);
  margin: 40px auto 0;
}

.revision-focus-active .revision-card:not(:first-child) {
  display: none;
}

.revision-focus-active .revision-card {
  min-height: min(58vh, 520px);
}

.revision-focus-active .revision-actions button:not(#revision-focus-button) {
  display: none;
}

.teacher-form-row,
.settings-revision-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.teacher-form-row > label,
.settings-revision-grid > label {
  display: grid;
  align-content: start;
  gap: 6px;
}

.teacher-action-message {
  margin: 18px 0 0;
  border-left: 3px solid var(--border-strong);
  background: var(--surface-subtle);
  padding: 10px 13px;
  color: var(--text-secondary);
}

.teacher-action-message.success {
  border-left-color: var(--success);
}

.teacher-action-message.error {
  border-left-color: var(--danger);
  color: var(--danger);
}

.teacher-metric-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.teacher-metric-grid article:nth-child(3n) {
  border-right: 0;
}

.teacher-metric-grid article:nth-child(n + 4) {
  border-top: 1px solid var(--border);
}

.teacher-tabs {
  position: sticky;
  top: var(--topbar-height);
  z-index: 5;
  background: var(--canvas);
}

.teacher-table-wrap,
.topic-heatmap-wrap {
  overscroll-behavior-inline: contain;
}

.settings-revision-form {
  display: grid;
  max-width: var(--form-width);
  gap: 18px;
  margin-top: 22px;
}

.settings-revision-form > label {
  display: grid;
  gap: 6px;
}

.settings-exam-date-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
}

.settings-exam-date-grid label {
  display: grid;
  gap: 6px;
}

.privacy-consent-row {
  display: flex;
  align-items: start;
  justify-content: space-between;
  gap: 24px;
  max-width: var(--form-width);
  margin: 22px 0;
  border-block: 1px solid var(--border);
  padding: 16px 0;
}

.privacy-consent-row strong,
.privacy-consent-row small {
  display: block;
}

.privacy-consent-row small {
  max-width: 62ch;
  margin-top: 4px;
  color: var(--text-muted);
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0;
  line-height: 1.5;
  text-transform: none;
}

.privacy-consent-row input {
  width: 20px;
  min-height: 20px;
  flex: 0 0 auto;
  margin-top: 2px;
}

.generated-provenance {
  margin: 0 0 18px;
  border: 1px solid var(--border);
  border-left: 3px solid var(--warning);
  background: var(--surface-subtle);
  padding: 13px 15px;
}

.generated-provenance strong,
.generated-provenance small {
  display: block;
}

.generated-provenance p {
  margin: 5px 0;
  color: var(--text-secondary);
}

.generated-provenance small {
  color: var(--text-muted);
}

.public-topic-page {
  min-height: 100vh;
  background: var(--canvas);
}

.public-topic-page > header,
.public-topic-page > main {
  width: min(980px, calc(100% - 40px));
  margin-inline: auto;
}

.public-topic-page > header {
  display: flex;
  min-height: 72px;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  border-bottom: 1px solid var(--border);
}

.public-topic-brand {
  display: flex;
  align-items: center;
  gap: 11px;
  color: var(--text);
  text-decoration: none;
}

.public-topic-brand > span:last-child {
  display: grid;
}

.public-topic-brand small {
  color: var(--text-muted);
}

.public-topic-page > header > .primary-account-button,
.public-topic-page aside > a {
  display: inline-flex;
  min-height: 40px;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--accent);
  border-radius: var(--radius-control);
  background: var(--accent);
  padding: 8px 12px;
  color: var(--on-accent);
  font-weight: 700;
  text-decoration: none;
}

.public-topic-page > main {
  padding: 72px 0 64px;
}

.public-topic-page h1 {
  max-width: 820px;
  margin: 0;
  font-size: clamp(2.5rem, 6vw, 4.8rem);
  line-height: 1.02;
}

.public-topic-summary {
  max-width: var(--reading-width);
  margin: 22px 0 0;
  color: var(--text-secondary);
  font-size: 1.1rem;
  line-height: 1.65;
}

.public-topic-page main > section {
  display: grid;
  grid-template-columns: minmax(240px, .75fr) minmax(0, 1.25fr);
  gap: 64px;
  margin-top: 68px;
  border-top: 1px solid var(--border-strong);
  padding-top: 32px;
}

.public-topic-page main > section h2 {
  margin: 0;
  font-size: 2rem;
}

.public-topic-page main > section p:not(.eyebrow) {
  margin-top: 12px;
  color: var(--text-secondary);
}

.public-topic-page main > section ul {
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--border);
  list-style: none;
}

.public-topic-page main > section li {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  border-bottom: 1px solid var(--border);
  padding: 13px 0;
}

.public-topic-page main > section li span {
  flex: 0 0 auto;
  color: var(--text-muted);
  font-size: 0.72rem;
  text-transform: uppercase;
}

.public-topic-page main > aside {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-top: 48px;
  border-block: 1px solid var(--border-strong);
  padding: 20px 0;
}

.public-topic-page main > aside > div {
  display: grid;
  min-width: 0;
  flex: 1;
}

.public-topic-page main > aside span,
.public-topic-disclaimer {
  color: var(--text-muted);
  font-size: 0.75rem;
}

.public-topic-page aside > a:first-of-type {
  border-color: var(--border-strong);
  background: var(--surface);
  color: var(--text);
}

.public-topic-disclaimer {
  margin: 28px 0 0;
}

@media (max-width: 820px) {
  .topbar-search-button kbd {
    display: none;
  }

  .teacher-tabs {
    top: var(--topbar-height);
  }

  .teacher-metric-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .teacher-metric-grid article:nth-child(3n) {
    border-right: 1px solid var(--border);
  }

  .teacher-metric-grid article:nth-child(2n) {
    border-right: 0;
  }

  .revision-focus-active .revision-stage {
    width: min(100% - 28px, 760px);
    padding-top: 12px;
  }

  .revision-focus-active .revision-stage-head {
    align-items: flex-start;
  }

  .public-topic-page main > section {
    grid-template-columns: 1fr;
    gap: 28px;
  }
}

@media (max-width: 620px) {
  .topbar-search-button {
    display: inline-flex;
  }

  .global-search-modal {
    align-items: end;
    padding: 0;
  }

  .global-search-dialog {
    max-height: 92vh;
    border-radius: var(--radius-dialog) var(--radius-dialog) 0 0;
  }

  .global-search-head {
    padding: 18px 18px 14px;
  }

  .global-search-field {
    margin-inline: 18px;
  }

  .global-search-result {
    grid-template-columns: 62px minmax(0, 1fr);
    gap: 9px;
  }

  .global-search-result-action,
  .global-search-help span:last-child {
    display: none;
  }

  .teacher-form-row,
  .settings-revision-grid,
  .settings-exam-date-grid,
  .teacher-metric-grid {
    grid-template-columns: 1fr;
  }

  .teacher-metric-grid article,
  .teacher-metric-grid article:nth-child(2n),
  .teacher-metric-grid article:nth-child(3n) {
    border-right: 0;
  }

  .teacher-metric-grid article + article {
    border-top: 1px solid var(--border);
  }

  .teacher-tabs button {
    min-height: 48px;
    padding-inline: 12px;
  }

  .revision-focus-active .revision-stage-head {
    flex-direction: row;
    gap: 12px;
  }

  .revision-focus-active .revision-stage-head h3 {
    font-size: 1.2rem;
  }

  .revision-focus-active .revision-card {
    min-height: 62vh;
  }

  .public-topic-page > header,
  .public-topic-page > main {
    width: calc(100% - 28px);
  }

  .public-topic-page > main {
    padding-top: 48px;
  }

  .public-topic-page h1 {
    font-size: 2.5rem;
  }

  .public-topic-page main > aside {
    align-items: stretch;
    flex-direction: column;
  }

  .public-topic-page main > aside > div {
    margin-bottom: 8px;
  }
}

@media (max-width: 620px) {
  .landing-nav {
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 10px;
    padding-block: 10px;
  }

  .landing-primary-links,
  .landing-nav-actions > [data-landing-action="demo"] {
    display: none;
  }

  .landing-nav-actions {
    grid-column: 2;
    grid-row: 1;
    overflow: visible;
  }

  .landing-nav-actions button {
    min-height: 40px;
  }

  .landing-hero {
    padding-block: 46px;
  }

  .landing-hero h1 {
    font-size: 2.65rem;
    line-height: 1.04;
  }

  .topbar-theme-toggle {
    display: grid !important;
  }

  .topbar-search-button {
    min-width: 42px;
    justify-content: center;
    padding-inline: 6px;
  }

  .topbar-search-button > span {
    font-size: 0.7rem;
  }
}

@media (max-width: 350px) {
  .topbar-search-button > span {
    position: absolute;
    width: 1px;
    height: 1px;
    overflow: hidden;
    clip-path: inset(50%);
  }

  .topbar-search-button::before {
    content: "⌕";
    font-size: 1.15rem;
    line-height: 1;
  }
}

/* Profile and revision preferences */
.settings-dialog {
  width: min(900px, 100%);
  overflow: hidden;
}

.settings-body {
  max-height: min(680px, calc(100vh - 150px));
}

.settings-tabs,
.settings-panel {
  min-height: 0;
}

.settings-tabs {
  gap: 3px;
}

.settings-tabs button {
  border-radius: var(--radius-sm);
  font-weight: 650;
}

.settings-panel {
  overflow-y: auto;
  overscroll-behavior: contain;
  padding: 30px 34px 34px;
}

.settings-panel-intro {
  margin-bottom: 22px;
}

.settings-panel-intro .eyebrow {
  margin: 0 0 7px;
}

.settings-panel-intro h3 {
  font-size: 1.45rem;
  letter-spacing: 0;
}

.settings-panel-intro > p:last-child {
  max-width: 62ch;
  margin: 8px 0 0;
  color: var(--text-secondary);
  line-height: 1.55;
}

.profile-summary-card {
  position: relative;
  grid-template-columns: auto minmax(0, 1fr) auto;
  gap: 16px;
  margin-bottom: 18px;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  background: linear-gradient(120deg, var(--accent-soft), var(--surface) 72%);
  padding: 18px;
}

.account-settings-card .profile-avatar {
  display: grid;
  flex: 0 0 auto;
}

.profile-summary-copy {
  min-width: 0;
}

.profile-summary-copy strong {
  overflow: hidden;
  color: var(--text);
  font-size: 1rem;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.profile-summary-copy span {
  overflow: hidden;
  margin-top: 2px;
  color: var(--text-secondary);
  text-overflow: ellipsis;
  white-space: nowrap;
}

.profile-summary-copy small {
  margin-top: 5px;
  color: var(--text-muted);
  font-weight: 620;
}

.profile-sync-badge {
  align-self: start;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: var(--surface);
  padding: 5px 9px;
  color: var(--text-muted);
  font-size: 0.66rem;
  font-weight: 700;
  white-space: nowrap;
}

.profile-sync-badge.is-synced {
  border-color: color-mix(in srgb, var(--accent) 38%, var(--border));
  color: var(--accent-ink);
}

.profile-sync-badge.is-synced::before {
  display: inline-block;
  width: 6px;
  height: 6px;
  margin-right: 6px;
  border-radius: 50%;
  background: var(--accent);
  content: "";
  vertical-align: 1px;
}

.settings-identity-form,
.settings-revision-form {
  display: grid;
  max-width: none;
  gap: 12px;
  margin-top: 0;
}

.settings-section-card {
  min-width: 0;
  margin: 0;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  background: var(--surface);
  padding: 18px;
}

fieldset.settings-section-card {
  display: grid;
  gap: 14px;
}

.settings-section-card > legend {
  float: left;
  width: 100%;
  margin: 0 0 4px;
  padding: 0;
  color: var(--text);
  font-size: 0.92rem;
  font-weight: 730;
}

.settings-section-card > legend + p {
  clear: both;
  margin: 0;
  color: var(--text-muted);
  font-size: 0.74rem;
  line-height: 1.5;
}

.settings-section-head {
  display: flex;
  align-items: start;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 15px;
}

.settings-section-head h4 {
  margin: 0;
  font-size: 0.92rem;
}

.settings-section-head p {
  margin: 4px 0 0;
  color: var(--text-muted);
  font-size: 0.74rem;
  line-height: 1.5;
}

.profile-field-grid,
.settings-field-grid,
.settings-exam-date-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.profile-field-grid label,
.settings-field-grid label,
.settings-exam-date-grid label,
.settings-section-card > label {
  display: grid;
  min-width: 0;
  gap: 7px;
  color: var(--text-secondary);
  font-size: 0.72rem;
  font-weight: 680;
}

.settings-field-grid > :last-child:nth-child(odd) {
  grid-column: 1 / -1;
}

.profile-field-grid input,
.settings-field-grid input,
.settings-field-grid select,
.settings-exam-date-grid input,
.settings-section-card textarea {
  width: 100%;
}

.profile-field-grid input[readonly] {
  border-style: dashed;
  background: var(--surface-subtle);
  color: var(--text-muted);
  cursor: not-allowed;
}

.profile-field-grid label small {
  color: var(--text-muted);
  font-size: 0.66rem;
  font-weight: 520;
  line-height: 1.4;
  letter-spacing: 0;
  text-transform: none;
}

.avatar-choice-grid {
  grid-template-columns: repeat(6, minmax(0, 1fr));
  gap: 7px;
}

.avatar-choice-grid > button {
  position: relative;
  min-height: 106px;
  align-content: center;
  border-color: var(--border);
  border-radius: var(--radius-sm);
  background: var(--surface-subtle);
  padding: 10px 5px 8px;
  transition: border-color 150ms ease, background-color 150ms ease, transform 150ms ease;
}

.avatar-choice-grid > button:hover {
  border-color: var(--border-strong);
  background: var(--surface);
  transform: translateY(-1px);
}

.avatar-choice-grid > button.active {
  box-shadow: inset 0 -2px 0 var(--accent);
}

.profile-avatar-choice {
  width: 38px;
  height: 38px;
  min-height: 38px;
  padding: 0;
}

.avatar-selected-label {
  color: var(--text-muted);
  font-size: 0.58rem;
  font-weight: 580;
}

.avatar-choice-grid > button.active .avatar-selected-label {
  color: var(--accent-ink);
  font-weight: 700;
}

.profile-guest-note {
  display: grid;
  gap: 3px;
  border-left: 3px solid var(--accent);
  background: var(--surface-subtle);
  padding: 12px 14px;
}

.profile-guest-note[hidden] {
  display: none;
}

.profile-guest-note strong {
  font-size: 0.78rem;
}

.profile-guest-note span {
  color: var(--text-muted);
  font-size: 0.72rem;
  line-height: 1.45;
}

.settings-form-footer {
  display: flex;
  min-height: 48px;
  align-items: center;
  justify-content: flex-end;
  gap: 16px;
  margin-top: 3px;
  border-top: 1px solid var(--border);
  padding-top: 14px;
}

.settings-form-footer .status-message {
  flex: 1;
  margin: 0;
  font-size: 0.72rem;
}

.settings-form-footer button {
  min-width: 132px;
}

.settings-section-card textarea {
  min-height: 92px;
  resize: vertical;
}

.field-character-count {
  justify-self: end;
  margin-top: -7px;
  color: var(--text-muted);
  font-size: 0.64rem;
}

.account-security-tools {
  margin-top: 12px;
  border-radius: var(--radius-md);
  background: var(--surface-subtle);
}

@media (max-width: 820px) {
  .settings-dialog {
    max-height: calc(100dvh - 16px);
  }

  .settings-body {
    display: grid;
    max-height: calc(100dvh - 116px);
    grid-template-rows: auto minmax(0, 1fr);
  }

  .settings-tabs {
    scrollbar-width: none;
  }

  .settings-tabs::-webkit-scrollbar {
    display: none;
  }

  .settings-panel {
    padding: 24px;
  }

  .avatar-choice-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (max-width: 620px) {
  .settings-modal {
    padding: 0;
  }

  .settings-dialog {
    width: 100%;
    height: 100dvh;
    max-height: none;
    border-width: 0;
    border-radius: 0;
  }

  .settings-head {
    padding: 18px 18px 14px;
  }

  .settings-head h2 {
    font-size: 1.45rem;
  }

  .settings-body {
    max-height: calc(100dvh - 92px);
  }

  .settings-tabs {
    padding: 8px 12px;
  }

  .settings-tabs button {
    min-height: 42px;
    padding-inline: 13px;
  }

  .settings-panel {
    padding: 22px 16px 32px;
  }

  .profile-summary-card {
    grid-template-columns: auto minmax(0, 1fr);
    padding: 15px;
  }

  .profile-sync-badge {
    grid-column: 2;
    justify-self: start;
  }

  .profile-field-grid,
  .settings-field-grid,
  .settings-exam-date-grid {
    grid-template-columns: 1fr;
  }

  .settings-field-grid > :last-child:nth-child(odd) {
    grid-column: auto;
  }

  .settings-section-card {
    padding: 15px;
  }

  .avatar-choice-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .avatar-choice-grid > button {
    min-height: 98px;
  }

  .settings-form-footer {
    align-items: stretch;
    flex-direction: column;
  }

  .settings-form-footer button {
    width: 100%;
  }
}