/* Public pages of Revision AI, drawn by the server: home, revision notes, subjects, search, pricing, the fixed pages
   and the error pages (server/lib/site-layout.mjs and the modules it serves). The content editor uses this sheet as
   well. Colours come from the official tokens in brand/brand.css; a page follows the learner's saved light or dark
   theme (assets/learn/theme.js sets html[data-theme]). Accessible pairs only: white on violet, ink on mint, ink or
   violet on white. A state is never shown by colour alone: it carries a word, a mark or an icon as well. */

:root {
  /* older names, still read by the content editor */
  --muted: #625D70; --line: #D8D4E4; --soft: #F0EBFC;
  /* tints mixed from the official tokens, so they follow the theme */
  --site-soft: color-mix(in srgb, var(--color-action) 9%, var(--color-surface));
  --site-control: color-mix(in srgb, var(--color-text-secondary) 72%, var(--color-surface));
  --site-shadow: 0 12px 26px color-mix(in srgb, var(--ink) 9%, transparent);
}

* { box-sizing: border-box; }
body {
  margin: 0; font: 16px/1.6 Inter, Arial, sans-serif;
  background: var(--color-background); color: var(--color-text-primary);
}
h1, h2, h3 {
  font-family: Manrope, Arial, sans-serif; line-height: 1.25; letter-spacing: -.035em; overflow-wrap: break-word;
}
a { color: inherit; text-decoration: none; }
button, input, textarea, select { font: inherit; }
a:focus-visible, button:focus-visible, input:focus-visible, textarea:focus-visible, select:focus-visible,
summary:focus-visible { outline: 2px solid var(--color-focus); outline-offset: 2px; }
.skip { position: absolute; left: 20px; top: -100px; }
.skip:focus { top: 10px; background: var(--color-action); color: var(--color-action-text); padding: 10px; z-index: 30; }
.visually-hidden {
  position: absolute !important; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden;
  clip: rect(0 0 0 0); white-space: nowrap; border: 0;
}
svg.ico {
  width: 20px; height: 20px; flex: none; fill: none; stroke: currentColor; stroke-width: 2;
  stroke-linecap: round; stroke-linejoin: round;
}
.mouth-open { display: none; }
[hidden] { display: none !important; }

/* ---------- buttons, badges, links ---------- */
.button {
  display: inline-flex; justify-content: center; align-items: center; gap: 8px; min-height: 48px;
  border: 1px solid var(--color-border); border-radius: 12px; padding: 12px 20px; font-size: 15px; font-weight: 600;
  line-height: 1.3; text-align: center; background: var(--color-surface); color: var(--color-text-primary);
  cursor: pointer;
}
.button:hover { border-color: var(--color-link); }
.button.primary { background: var(--color-action); border-color: var(--color-action); color: var(--color-action-text); }
.button.primary:hover { background: color-mix(in srgb, var(--color-action) 88%, var(--ink)); }
.button.soft { background: var(--site-soft); color: var(--color-link); border: 0; }
.button:disabled { opacity: .6; cursor: default; }
.button .ico { width: 18px; height: 18px; }
.actions { display: flex; gap: 12px; flex-wrap: wrap; margin: 28px 0; }
.eyebrow {
  display: block; margin: 0; font-size: 12px; font-weight: 600; letter-spacing: .12em; color: var(--color-link);
}
.text-link {
  display: inline-flex; align-items: center; gap: 6px; min-height: 44px; color: var(--color-link); font-weight: 600;
}
.text-link:hover { text-decoration: underline; text-underline-offset: 3px; }
.text-link .ico { width: 18px; height: 18px; }
.badge {
  display: inline-flex; align-items: center; gap: 6px; width: fit-content; margin: 0; padding: 4px 10px;
  border-radius: 999px; font-size: 13px; font-weight: 600; line-height: 1.4;
  background: var(--site-soft); color: var(--color-link);
}
.badge .ico { width: 16px; height: 16px; }
.badge-free, .badge-current { background: var(--color-accent); color: var(--ink); }
.badge-done { background: var(--success-bg); color: var(--success-text); }
.badge-attention { background: var(--attention-bg); color: var(--attention-text); }
.notice {
  display: flex; gap: 10px; align-items: flex-start; padding: 12px 16px; border-radius: 12px;
  background: var(--info-bg); color: var(--info-text);
}
.notice .ico { margin-top: 2px; }

/* ---------- header ---------- */
.site-header { position: relative; background: var(--color-surface); border-bottom: 1px solid var(--color-border); }
.site-header-inner {
  max-width: 1280px; margin: auto; padding: 12px 40px; display: flex; align-items: center; gap: 20px;
}
.site-logo { flex: none; border-radius: 8px; }
.site-logo img {
  display: block; width: 150px; height: 50px; object-fit: contain; background: #fff; border-radius: 8px;
}
.site-bar { flex: 1; display: flex; align-items: center; gap: 16px; min-width: 0; }
.site-nav { display: flex; align-items: center; gap: 2px; }
.site-nav a {
  display: inline-flex; align-items: center; min-height: 44px; padding: 0 12px; border-radius: 10px;
  font-size: 15px; font-weight: 500; white-space: nowrap;
}
.site-nav a:hover { background: var(--site-soft); }
.site-nav a[aria-current] { color: var(--color-link); font-weight: 600; box-shadow: inset 0 -3px 0 var(--color-link); }
.site-search {
  display: flex; align-items: center; flex: 1 1 200px; max-width: 280px; margin-left: auto;
  border: 1px solid var(--site-control); border-radius: 12px; background: var(--color-surface);
}
.site-search:has(input:focus-visible) { outline: 2px solid var(--color-focus); outline-offset: 2px; }
.site-search input {
  flex: 1; min-width: 0; min-height: 44px; padding: 0 12px; border: 0; background: transparent;
  color: var(--color-text-primary);
}
.site-search input:focus-visible { outline: none; }
.site-search input::placeholder { color: var(--color-text-secondary); }
.site-search-button {
  display: grid; place-items: center; min-width: 44px; min-height: 44px; border: 0; border-radius: 12px;
  background: transparent; color: var(--color-text-secondary); cursor: pointer;
}
.site-search-button:hover { color: var(--color-link); }
.site-account { display: flex; gap: 8px; flex: none; }
.site-account .button { min-height: 44px; padding: 10px 16px; }
.site-menu { display: none; }

/* the content editor's own header (content-editor.html) */
.public-header {
  max-width: 1280px; margin: auto; padding: 20px 40px; display: flex; align-items: center;
  justify-content: space-between; gap: 24px;
}
.public-header img { object-fit: contain; display: block; background: #fff; border-radius: 8px; }
.public-header nav { display: flex; align-items: center; gap: 28px; font-size: 14px; }

/* ---------- page frame ---------- */
main { max-width: 1280px; padding: 10px 40px 80px; margin: auto; }
.breadcrumbs ol {
  list-style: none; display: flex; flex-wrap: wrap; margin: 18px 0 36px; padding: 0;
  font-size: 13px; color: var(--color-text-secondary);
}
.breadcrumbs li { display: flex; align-items: center; }
.breadcrumbs li + li::before { content: '/'; margin: 0 10px; color: var(--site-control); }
.breadcrumbs a { display: inline-block; padding: 4px 0; }
.breadcrumbs a:hover { color: var(--color-link); text-decoration: underline; }
.breadcrumbs a[aria-current] { color: var(--color-text-primary); font-weight: 500; }
.section-head {
  display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 4px 24px;
  margin-bottom: 18px;
}
.section-head h2 { font-size: 32px; margin: 0; }

/* ---------- footer ---------- */
.site-footer { border-top: 1px solid var(--color-border); background: var(--color-surface); }
.site-footer-inner {
  max-width: 1280px; margin: auto; padding: 20px 40px; display: flex; justify-content: space-between;
  align-items: center; flex-wrap: wrap; gap: 8px 24px; font-size: 14px; color: var(--color-text-secondary);
}
.site-footer p { margin: 0; }
.site-footer nav { display: flex; flex-wrap: wrap; gap: 0 20px; }
.site-footer a { display: inline-flex; align-items: center; min-height: 44px; }
.site-footer a:hover { color: var(--color-link); text-decoration: underline; }

/* ---------- home ---------- */
.public-hero {
  display: grid; grid-template-columns: 1.05fr .95fr; gap: 64px; align-items: center; margin: 32px 0 48px;
}
.public-hero h1 { font-size: 56px; line-height: 64px; font-weight: 700; margin: 22px 0; }
.lead-copy { font-size: 18px; line-height: 28px; color: var(--color-text-secondary); max-width: 640px; margin: 0; }
.hero-facts {
  list-style: none; margin: 0; padding: 0; display: flex; flex-wrap: wrap; gap: 8px 20px;
  font-size: 14px; color: var(--color-text-secondary);
}
.hero-facts li::before {
  content: ''; display: inline-block; width: 5px; height: 10px; margin: 0 9px 3px 2px;
  border: solid var(--color-link); border-width: 0 2px 2px 0; transform: rotate(45deg); vertical-align: middle;
}
.public-coach {
  position: relative; height: 480px; border: 1px solid var(--color-border); background: var(--color-surface);
  border-radius: 32px; overflow: hidden;
}
.public-coach .coach-art { position: absolute; width: 360px; height: 430px; bottom: -12px; left: calc(50% - 180px); }
.coach-label {
  position: absolute; z-index: 2; top: 22px; left: 22px; margin: 0; padding: 8px 12px; border-radius: 8px;
  background: var(--color-accent); color: var(--ink); font-size: 13px;
}
.floating-equation {
  position: absolute; bottom: 26px; right: 20px; z-index: 3; margin: 0; padding: 18px 24px; border-radius: 16px;
  background: var(--color-action); color: var(--color-action-text); font: 26px Manrope, Arial, sans-serif;
  box-shadow: var(--site-shadow);
}
.value-strip ul {
  list-style: none; margin: 0 0 56px; padding: 22px 24px; display: grid; grid-template-columns: repeat(4, 1fr);
  gap: 20px 28px; background: var(--color-surface); border: 1px solid var(--color-border); border-radius: 16px;
}
.value-strip li { display: flex; gap: 12px; align-items: flex-start; }
.value-strip .ico { width: 24px; height: 24px; margin-top: 2px; color: var(--color-link); }
.value-strip p { margin: 0; font-size: 14px; line-height: 22px; color: var(--color-text-secondary); }
.value-strip .value-title { margin-bottom: 2px; font-size: 15px; font-weight: 600; color: var(--color-text-primary); }
.home-section { margin: 0 0 64px; }
.home-intro { max-width: 760px; margin-bottom: 28px; }
.feature-grid {
  list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px;
}
.feature-card {
  display: flex; flex-direction: column; align-items: flex-start; padding: 24px;
  background: var(--color-surface); border: 1px solid var(--color-border); border-radius: 16px;
}
.feature-card > .ico { width: 28px; height: 28px; color: var(--color-link); }
.feature-card h3 { font-size: 20px; margin: 14px 0 8px; }
.feature-card p { flex: 1; margin: 0 0 20px; font-size: 15px; color: var(--color-text-secondary); }
.prompts > p { margin: -6px 0 18px; color: var(--color-text-secondary); }
.prompt-list {
  list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px;
}
.prompt {
  display: flex; align-items: center; gap: 12px; min-height: 64px; padding: 14px 18px; font-weight: 600;
  background: var(--color-surface); border: 1px solid var(--color-border); border-radius: 16px;
}
.prompt:hover { border-color: var(--color-link); }
.prompt span { flex: 1; }
.prompt .ico { color: var(--color-link); }
.prompt .ico:last-child { color: var(--color-text-secondary); }

/* ---------- subject cards (home, catalogue) ---------- */
.subject-grid {
  list-style: none; margin: 0; padding: 0; display: grid; gap: 16px;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
}
.subject-card {
  position: relative; display: flex; flex-direction: column; gap: 6px; padding: 20px;
  background: var(--color-surface); border: 1px solid var(--color-border); border-radius: 16px;
}
.subject-card:hover { border-color: var(--color-link); }
.subject-card:has(a:focus-visible) { outline: 2px solid var(--color-focus); outline-offset: 2px; }
.subject-card p { margin: 0; }
.subject-card h3 { font-size: 20px; margin: 0; }
.subject-card h3 a::after { content: ''; position: absolute; inset: 0; border-radius: 16px; }
.subject-card h3 a:focus-visible { outline: none; }
.subject-card-programme {
  font-size: 12px; font-weight: 600; letter-spacing: .08em; text-transform: uppercase; color: var(--color-link);
}
.subject-card-family { font-size: 14px; color: var(--color-text-secondary); }
.subject-card .subject-card-meta { margin-top: auto; padding-top: 8px; font-size: 14px; }
.subject-card .badge { margin-top: auto; }

/* ---------- catalogue (/subjects) ---------- */
.catalogue-intro { max-width: 760px; margin: -12px 0 28px; }
.your-subjects { margin: 0 0 32px; padding: 20px 24px 24px; background: var(--site-soft); border-radius: 16px; }
.your-subjects .section-head h2 { font-size: 26px; }
.your-subjects > p { margin: 0; }
.catalogue-filters {
  margin: 0 0 16px; padding: 20px 24px; background: var(--color-surface); border: 1px solid var(--color-border);
  border-radius: 16px;
}
.chips { border: 0; margin: 0 0 16px; padding: 0; display: flex; flex-wrap: wrap; gap: 10px; min-width: 0; }
.chips legend { float: left; width: 100%; margin: 0 0 10px; padding: 0; font-size: 14px; font-weight: 600; }
.chip { position: relative; display: inline-flex; }
.chip input { position: absolute; opacity: 0; width: 1px; height: 1px; margin: 0; }
.chip span {
  display: inline-flex; align-items: center; gap: 6px; min-height: 44px; padding: 0 16px; cursor: pointer;
  border: 1px solid var(--site-control); border-radius: 999px; background: var(--color-surface);
  font-size: 15px; font-weight: 500;
}
.chip span:hover { border-color: var(--color-link); }
.chip .ico { display: none; width: 16px; height: 16px; }
.chip input:checked + span {
  background: var(--color-action); border-color: var(--color-action); color: var(--color-action-text); font-weight: 600;
}
.chip input:checked + span .ico { display: inline; }
.chip input:focus-visible + span { outline: 2px solid var(--color-focus); outline-offset: 2px; }
.filter-row { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1.4fr) auto; gap: 16px; align-items: end; }
.field { display: grid; gap: 6px; font-size: 14px; font-weight: 600; }
.field select, .field input {
  width: 100%; min-height: 48px; padding: 0 12px; border: 1px solid var(--site-control); border-radius: 10px;
  background: var(--color-surface); color: var(--color-text-primary); font-weight: 400;
}
.filter-actions { display: flex; flex-wrap: wrap; gap: 10px; }
.result-count { margin: 0 0 22px; font-size: 15px; color: var(--color-text-secondary); }
.catalogue-group { margin: 0 0 36px; }
.catalogue-group h2 { font-size: 24px; margin: 0 0 14px; }
.empty-state {
  padding: 24px 28px; background: var(--color-surface); border: 1px dashed var(--site-control); border-radius: 16px;
}
.empty-state p { margin: 0; }
.empty-state .actions { margin: 18px 0 0; }

/* ---------- subject page ---------- */
.subject-head { max-width: 920px; margin-bottom: 36px; }
.subject-head h1 { font-size: 44px; line-height: 52px; margin: 16px 0 12px; }
.subject-head .actions { margin: 24px 0; }
.subject-stats { display: flex; flex-wrap: wrap; gap: 12px; margin: 0; }
.subject-stats div {
  min-width: 150px; padding: 12px 18px; background: var(--color-surface); border: 1px solid var(--color-border);
  border-radius: 14px;
}
.subject-stats dt { font-size: 13px; color: var(--color-text-secondary); }
.subject-stats dd { margin: 2px 0 0; font: 700 22px/1.3 Manrope, Arial, sans-serif; }
.subject-stats .stat-progress dd { font-size: 18px; }
.subject-layout { display: grid; grid-template-columns: 260px minmax(0, 1fr); gap: 40px; align-items: start; }
.subject-nav {
  position: sticky; top: 16px; padding: 8px 16px 16px; background: var(--color-surface);
  border: 1px solid var(--color-border); border-radius: 16px;
}
.subject-nav summary {
  display: flex; align-items: center; min-height: 44px; cursor: pointer;
  font: 700 16px Manrope, Arial, sans-serif;
}
.subject-nav ol { list-style: none; margin: 4px 0 0; padding: 0; display: grid; gap: 2px; }
.subject-nav a { display: block; padding: 8px 10px; border-radius: 8px; font-size: 14px; line-height: 1.4; }
.subject-nav a:hover { background: var(--site-soft); color: var(--color-link); }
.subject-overview, .subject-section {
  margin: 0 0 32px; padding: 28px; background: var(--color-surface); border: 1px solid var(--color-border);
  border-radius: 16px;
}
.subject-section h2 { font-size: 24px; margin: 0 0 10px; }
.subject-section p { margin: 0 0 20px; }
.unit { margin: 0 0 32px; scroll-margin-top: 16px; }
.unit h2 { display: flex; flex-direction: column; gap: 4px; margin: 0 0 4px; font-size: 24px; }
.unit-number {
  font: 600 13px Inter, Arial, sans-serif; letter-spacing: .08em; text-transform: uppercase; color: var(--color-link);
}
.unit-level { margin: 0; font-size: 14px; color: var(--color-text-secondary); }
.topic-list { list-style: none; margin: 12px 0 0; padding: 0; display: grid; gap: 10px; }
.topic-row {
  display: grid; grid-template-columns: 36px minmax(0, 1fr) auto; gap: 14px; align-items: center; padding: 14px 18px;
  background: var(--color-surface); border: 1px solid var(--color-border); border-radius: 14px;
}
.topic-number {
  display: grid; place-items: center; width: 32px; height: 32px; border-radius: 50%;
  background: var(--site-soft); color: var(--color-link); font-size: 14px; font-weight: 700;
}
.topic-text { display: grid; gap: 2px; min-width: 0; }
.topic-text a { padding: 2px 0; font-size: 17px; font-weight: 600; overflow-wrap: anywhere; }
.topic-text a:hover { color: var(--color-link); text-decoration: underline; }
.topic-meta { font-size: 14px; color: var(--color-text-secondary); }
.topic-badges { display: flex; flex-wrap: wrap; justify-content: flex-end; gap: 8px; }
#overview, #practice { scroll-margin-top: 16px; }

/* ---------- articles, collections and fixed pages ---------- */
.article-head { max-width: 850px; margin-bottom: 40px; }
.article-head h1 { font-size: 40px; line-height: 48px; margin: 18px 0; }
.article-layout { display: grid; grid-template-columns: minmax(0, 1fr) 300px; gap: 56px; align-items: start; }
.article-body { font-size: 18px; line-height: 28px; }
.article-body h2 { font-size: 28px; margin: 32px 0 14px; }
.article-body h2:first-child { margin-top: 0; }
.article-body p { margin: 0 0 20px; white-space: pre-wrap; overflow-wrap: anywhere; }
.article-body a { color: var(--color-link); text-decoration: underline; }
.article-aside {
  padding: 24px; overflow: hidden; background: var(--color-surface); border: 1px solid var(--color-border);
  border-radius: 16px;
}
.article-aside h2 { font-size: 24px; }
.article-aside p { font-size: 14px; color: var(--color-text-secondary); }
.article-aside .button { font-size: 14px; padding: 10px 14px; }
.source-note {
  margin: 30px 0 !important; padding: 16px; font-size: 14px; color: var(--color-text-secondary);
  background: var(--color-surface); border-left: 3px solid var(--color-accent);
}
.source-note h2 { color: var(--color-text-primary); }
.source-note .actions { margin: 16px 0 0; }
.public-children { margin-top: 64px; }
.public-children > h2 { font-size: 32px; margin-bottom: 26px; }
.public-cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.public-card {
  display: flex; flex-direction: column; padding: 24px; background: var(--color-surface);
  border: 1px solid var(--color-border); border-radius: 16px; transition: border-color .16s;
}
.public-card:hover { border-color: var(--color-link); }
.public-card h3 { font-size: 24px; margin: 16px 0; }
.public-card p { font-size: 14px; color: var(--color-text-secondary); margin: 0 0 24px; flex: 1; }
.public-card .eyebrow { flex: none; margin: 0; }
.card-arrow {
  display: inline-flex; align-items: center; gap: 6px; color: var(--color-link); font-size: 14px; font-weight: 600;
}
.card-arrow .ico { width: 18px; height: 18px; }
.meta { font-size: 13px; color: var(--color-text-secondary); }

/* ---------- pricing ---------- */
.pricing-intro { max-width: 760px; }
.plan-compare { margin: 32px 0 0; }
.plan-switches { display: flex; flex-wrap: wrap; gap: 12px 20px; margin: 0 0 20px; }
.segmented {
  display: inline-flex; flex-wrap: wrap; gap: 4px; padding: 4px; background: var(--color-surface);
  border: 1px solid var(--site-control); border-radius: 12px;
}
.segmented a {
  display: inline-flex; align-items: center; gap: 6px; min-height: 44px; padding: 0 16px; border-radius: 9px;
  font-size: 15px; font-weight: 600;
}
.segmented a:hover { background: var(--site-soft); }
.segmented a[aria-current] { background: var(--color-action); color: var(--color-action-text); }
.segmented .ico { width: 16px; height: 16px; }
.plan-table-wrap {
  overflow-x: auto; background: var(--color-surface); border: 1px solid var(--color-border); border-radius: 16px;
}
.plan-table { width: 100%; table-layout: fixed; border-collapse: collapse; font-size: 15px; line-height: 1.5; }
.plan-table thead td { width: 18%; }
.plan-table caption { padding: 16px 20px 4px; text-align: left; font-size: 14px; color: var(--color-text-secondary); }
.plan-table th, .plan-table td {
  padding: 14px 16px; text-align: left; vertical-align: top; border-bottom: 1px solid var(--color-border);
}
.plan-table thead th { font: 700 17px/1.3 Manrope, Arial, sans-serif; letter-spacing: -.02em; }
.plan-table thead th .badge {
  display: flex; margin-top: 8px; font-family: Inter, Arial, sans-serif; letter-spacing: 0;
}
.plan-table tbody th { font-weight: 600; }
.plan-table tbody tr:last-child > * { border-bottom: 0; }
.plan-table .button { min-height: 44px; padding: 10px 14px; font-size: 14px; }
.plan-price { font: 700 18px/1.3 Manrope, Arial, sans-serif; }
.plan-cards { display: none; }
.plan-card {
  padding: 20px; background: var(--color-surface); border: 1px solid var(--color-border); border-radius: 16px;
}
.plan-card h3 { margin: 0 0 8px; font-size: 22px; }
.plan-card .plan-price { margin: 12px 0 0; }
.plan-card dl { display: grid; gap: 12px; margin: 16px 0 20px; }
.plan-card dt { font-size: 13px; color: var(--color-text-secondary); }
.plan-card dd { margin: 2px 0 0; }
.plan-note { margin: 0; font-size: 14px; color: var(--color-text-secondary); }
.plan-notes { max-width: 860px; margin: 20px 0 0; font-size: 15px; color: var(--color-text-secondary); }
.plan-notes p { margin: 0 0 12px; }

/* ---------- forms (placement and consultation) ---------- */
.public-form {
  max-width: 760px; margin: 40px 0; padding: 32px; background: var(--color-surface);
  border: 1px solid var(--color-border); border-radius: 16px;
}
.public-form h2 { font-size: 28px; margin-top: 0; }
.public-form label { display: block; font-size: 14px; margin-bottom: 18px; font-weight: 500; }
.public-form input:not([type=checkbox]), .public-form textarea, .public-form select {
  display: block; width: 100%; min-height: 48px; margin-top: 8px; padding: 12px; border: 1px solid var(--site-control);
  border-radius: 8px; color: var(--color-text-primary); background: var(--color-surface);
}
.public-form textarea { min-height: 130px; resize: vertical; }
.public-form .consent { display: flex; gap: 10px; align-items: start; font-weight: 400; }
.consent input { width: 20px; height: 20px; accent-color: var(--color-action); flex: none; }
.field-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
#form-status { padding: 12px 0; }
#form-status:empty { display: none; }
.form-honeypot {
  position: absolute !important; left: -10000px !important; width: 1px !important; height: 1px !important;
  overflow: hidden;
}
select {
  max-width: 100%; min-height: 48px; padding: 12px; border: 1px solid var(--site-control); border-radius: 8px;
  background: var(--color-surface); color: var(--color-text-primary);
}
/* WebKit keeps a native select small; drawn here so it reaches 48 px, with a chevron in the theme's text colour */
.field select, .public-form select {
  -webkit-appearance: none; appearance: none; padding-right: 40px;
  background-image: linear-gradient(45deg, transparent 50%, var(--color-text-secondary) 50%),
    linear-gradient(135deg, var(--color-text-secondary) 50%, transparent 50%);
  background-position: calc(100% - 21px) 50%, calc(100% - 15px) 50%;
  background-size: 6px 6px, 6px 6px; background-repeat: no-repeat;
}

/* ---------- search (/search, server/lib/site-search.mjs) ---------- */
.search-head { margin-bottom: 28px; }
.search-panel {
  margin: 0 0 18px; padding: 20px 24px; background: var(--color-surface); border: 1px solid var(--color-border);
  border-radius: 16px;
}
.search-row { display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: 12px; align-items: end; }
.search-row .button { min-width: 132px; }
.field-help { margin: 8px 0 0; font-size: 14px; line-height: 1.5; color: var(--color-text-secondary); }
.search-refine { margin: 16px 0 0; padding-top: 6px; border-top: 1px solid var(--color-border); }
.search-refine > summary {
  display: flex; align-items: center; gap: 10px; min-height: 44px; cursor: pointer; list-style: none;
  font: 700 16px Manrope, Arial, sans-serif;
}
.search-refine > summary::-webkit-details-marker { display: none; }
.search-refine > summary .ico { margin-left: auto; color: var(--color-text-secondary); }
.search-refine[open] > summary .ico { transform: rotate(180deg); }
.refine-chosen {
  padding: 2px 10px; border-radius: 999px; background: var(--site-soft); color: var(--color-link);
  font: 600 13px Inter, Arial, sans-serif;
}
.search-filters { margin: 8px 0 4px; }
.search-filters .chips { margin-bottom: 14px; }
.chip-count { font-size: 13px; font-weight: 500; }
.search-results { list-style: none; margin: 0 0 24px; padding: 0; display: grid; gap: 12px; }
.search-result {
  min-width: 0; padding: 18px 22px; background: var(--color-surface); border: 1px solid var(--color-border);
  border-radius: 14px;
}
.search-result:has(h3 a:hover) { border-color: var(--color-link); }
.search-result h3 { margin: 0 0 8px; font-size: 19px; line-height: 1.35; letter-spacing: -.02em; }
.search-result h3 a {
  display: inline-block; padding: 2px 0; overflow-wrap: anywhere; color: var(--color-text-primary);
}
.search-result h3 a:hover { color: var(--color-link); text-decoration: underline; text-underline-offset: 3px; }
.result-context {
  display: flex; flex-wrap: wrap; align-items: center; gap: 6px 12px; margin: 0;
  font-size: 14px; color: var(--color-text-secondary);
}
.result-type {
  display: inline-flex; align-items: center; gap: 6px; padding: 2px 10px; border-radius: 999px;
  background: var(--site-soft); color: var(--color-link); font-size: 13px; font-weight: 600;
}
.result-type .ico { width: 16px; height: 16px; }
.result-excerpt { margin: 10px 0 0; max-width: 860px; font-size: 15px; line-height: 1.6; overflow-wrap: anywhere; }
.result-excerpt mark { padding: 0 2px; border-radius: 3px; background: var(--color-accent); color: var(--ink); }
.result-meta {
  display: flex; flex-wrap: wrap; align-items: center; gap: 8px 14px; margin: 12px 0 0;
  font-size: 14px; color: var(--color-text-secondary);
}
.pagination {
  display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 12px; margin: 0 0 24px;
}
.pagination p { margin: 0 auto 0 0; font-size: 15px; color: var(--color-text-secondary); }
.search-scope { max-width: 760px; margin: 0; font-size: 14px; line-height: 1.5; color: var(--color-text-secondary); }
.search-intro { max-width: 760px; margin: 0 0 8px; }
.notice p { margin: 0; }
.notice-attention { margin: 0 0 4px; background: var(--attention-bg); color: var(--attention-text); }

/* ---------- error pages (server/lib/error-pages.mjs) ---------- */
.error-page { display: flex; justify-content: center; padding-top: 24px; }
.error-card {
  width: 100%; max-width: 720px; padding: 40px; background: var(--color-surface);
  border: 1px solid var(--color-border); border-radius: 16px;
}
.error-card h1 { font-size: 36px; line-height: 44px; margin: 14px 0 12px; }
.error-card .lead-copy { margin: 0; }
.error-card .actions { margin: 28px 0 0; }
.error-help { margin: 24px 0 0; font-size: 14px; line-height: 22px; color: var(--color-text-secondary); }
.error-help a { color: var(--color-link); text-decoration: underline; text-underline-offset: 2px; }

/* ---------- narrower screens ---------- */
@media (max-width: 1180px) {
  .site-header-inner {
    display: grid; grid-template-columns: auto minmax(0, 1fr) auto; row-gap: 6px;
    grid-template-areas: "logo . account" "nav nav search";
  }
  .site-bar { display: contents; }
  .site-logo { grid-area: logo; }
  .site-bar > .site-nav { grid-area: nav; }
  .site-bar > .site-search { grid-area: search; max-width: none; width: 260px; }
  .site-bar > .site-account { grid-area: account; justify-self: end; }
  .value-strip ul { grid-template-columns: repeat(2, 1fr); }
  .feature-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 1000px) {
  .public-hero { gap: 28px; }
  .public-hero h1 { font-size: 44px; line-height: 52px; }
  .public-coach { height: 420px; }
  .public-cards { grid-template-columns: repeat(2, 1fr); }
  .article-layout { grid-template-columns: minmax(0, 1fr) 250px; gap: 28px; }
  .subject-layout { grid-template-columns: 220px minmax(0, 1fr); gap: 28px; }
  .filter-row { grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); }
  .filter-actions { grid-column: 1 / -1; }
  .prompt-list { grid-template-columns: 1fr; }
}
/* the header becomes a menu once the links and the search no longer fit on one row beside each other */
@media (max-width: 900px) {
  .site-header-inner { display: flex; padding: 8px 40px; }
  .site-bar { display: none; }
  .site-logo img { width: 132px; height: 44px; }
  .site-menu { display: block; margin-left: auto; }
  .site-menu summary {
    display: inline-flex; align-items: center; gap: 8px; min-height: 44px; padding: 0 14px; cursor: pointer;
    list-style: none; border: 1px solid var(--color-border); border-radius: 12px; background: var(--color-surface);
    font-weight: 600;
  }
  .site-menu summary::-webkit-details-marker { display: none; }
  .site-menu[open] summary .ico { transform: rotate(180deg); }
  .site-menu-panel {
    position: absolute; left: 0; right: 0; top: 100%; z-index: 20; display: grid; gap: 14px; padding: 12px 40px 20px;
    background: var(--color-surface); border-bottom: 1px solid var(--color-border); box-shadow: var(--site-shadow);
  }
  .site-menu-panel .site-nav { flex-direction: column; align-items: stretch; }
  .site-menu-panel .site-nav a { min-height: 48px; font-size: 16px; }
  .site-menu-panel .site-nav a[aria-current] { box-shadow: inset 3px 0 0 var(--color-link); }
  .site-menu-panel .site-search { max-width: none; margin: 0; }
  .site-menu-panel .site-account { display: grid; grid-template-columns: 1fr 1fr; }
}
@media (max-width: 760px) {
  .site-header-inner { padding: 8px 20px; }
  .site-menu-panel { padding: 12px 20px 20px; }
  main { padding: 8px 20px 48px; }
  .breadcrumbs ol { margin: 14px 0 24px; font-size: 12px; }
  .section-head h2 { font-size: 26px; }
  .public-hero { grid-template-columns: 1fr; margin-top: 8px; gap: 28px; }
  .public-hero h1 { font-size: 36px; line-height: 44px; margin: 16px 0; }
  .lead-copy { font-size: 16px; line-height: 26px; }
  .public-coach { height: 360px; }
  .public-coach .coach-art { width: 300px; height: 355px; left: calc(50% - 150px); }
  .floating-equation { font-size: 22px; padding: 14px 18px; }
  .value-strip ul, .feature-grid, .public-cards, .article-layout, .field-grid, .filter-row {
    grid-template-columns: 1fr;
  }
  .value-strip ul { padding: 18px; }
  .article-head h1, .subject-head h1 { font-size: 32px; line-height: 40px; }
  .article-body { font-size: 17px; line-height: 28px; }
  .article-body h2 { font-size: 24px; }
  .article-aside { display: none; }
  .public-children { margin-top: 40px; }
  .public-children > h2 { font-size: 28px; }
  .public-form { padding: 22px; }
  .public-form h2 { font-size: 24px; }
  .catalogue-filters, .your-subjects { padding: 18px; }
  .filter-actions .button { flex: 1 1 auto; }
  .subject-layout { grid-template-columns: 1fr; gap: 24px; }
  .subject-nav { position: static; }
  .subject-overview, .subject-section { padding: 20px; }
  .subject-stats div { flex: 1 1 140px; min-width: 0; }
  .topic-row { grid-template-columns: 32px minmax(0, 1fr); padding: 14px; }
  .topic-badges { grid-column: 2; justify-content: flex-start; }
  .plan-table-wrap { display: none; }
  .plan-cards { display: grid; gap: 16px; }
  .segmented { width: 100%; }
  .segmented a { flex: 1 1 auto; justify-content: center; }
  .site-footer-inner { padding: 16px 20px; display: grid; }
  .error-page { padding-top: 8px; }
  .error-card { padding: 24px; }
  .error-card h1 { font-size: 28px; line-height: 36px; }
  .error-card .actions .button { flex: 1 1 100%; }
  .search-panel { padding: 18px; }
  .search-row { grid-template-columns: 1fr; }
  .search-row .button { width: 100%; }
  .search-result { padding: 16px; }
  .search-result h3 { font-size: 18px; }
  .pagination .button { flex: 1 1 auto; }
  .pagination p { flex: 1 1 100%; margin: 0; text-align: center; }
}
@media (max-width: 360px) {
  main { padding-left: 16px; padding-right: 16px; }
  .site-header-inner { padding-left: 16px; padding-right: 16px; }
  .public-hero h1 { font-size: 32px; line-height: 40px; }
  .public-coach .coach-art { width: 260px; height: 308px; left: calc(50% - 130px); }
}
@media (prefers-reduced-motion: reduce) {
  * { animation: none !important; transition: none !important; scroll-behavior: auto !important; }
}

/* ---------- touch targets (learn-a WP-A9, QA-01: 44 px for every target, 48 px for primary actions and fields) ---------- */
.site-search input, .site-search-button { min-height: 48px; }
.site-search-button { min-width: 48px; }
.button.primary, .site-account .button.primary, .plan-table .button.primary, .article-aside .button.primary {
  min-height: 48px;
}
.breadcrumbs a { display: inline-flex; align-items: center; min-height: 44px; min-width: 44px; padding: 0; }
.topic-text a { display: inline-flex; align-items: center; min-height: 44px; padding: 0; }
.site-footer a { min-width: 44px; justify-content: center; }
.subject-nav a { display: flex; align-items: center; min-height: 44px; padding: 4px 10px; }
.search-result h3 a { display: inline-flex; align-items: center; min-height: 44px; padding: 0; }
.public-form .consent { min-height: 44px; align-items: center; }

/* ---------- narrow screens (review fixes F26, F70) ---------- */
/* the open header menu fits the screen: its one column may shrink below the search field's natural width */
@media (max-width: 900px) {
  .site-menu-panel { grid-template-columns: minmax(0, 1fr); }
  .site-menu-panel .site-search { min-width: 0; }
  .site-menu-panel .site-search input { width: 100%; }
}
@media (max-width: 360px) {
  .site-menu-panel { padding: 12px 16px 20px; }
  .site-menu-panel .site-account { grid-template-columns: 1fr; }
}
/* the content editor's header: logo and links wrap with the 16 px gutter of the other pages */
@media (max-width: 760px) {
  .public-header { padding: 12px 16px; flex-wrap: wrap; gap: 8px 16px; }
  .public-header img { width: 132px; height: auto; }
  .public-header nav { flex-basis: 100%; flex-wrap: wrap; gap: 4px 18px; font-size: 14px; }
}

/* ---------- form messages (review fix F43): a named field and the form's alert, readable in both themes ---------- */
.form-field { min-width: 0; }
.field-error {
  margin: -10px 0 18px; padding: 6px 10px; border-radius: 8px; font-size: 14px; font-weight: 500;
  background: var(--error-bg); color: var(--error-text);
}
.public-form [aria-invalid="true"] { border-color: var(--error-text); box-shadow: 0 0 0 1px var(--error-text); }
.form-error {
  margin: 12px 0; padding: 12px 16px; border-radius: 12px; font-weight: 500;
  background: var(--error-bg); color: var(--error-text);
}
.public-form button[aria-disabled="true"] { opacity: .6; cursor: default; }