:root {
  --canvas: #f5f2ea;
  --surface: #fffdf8;
  --surface-soft: #eeece5;
  --ink: #1d2a2d;
  --muted: #667377;
  --line: #d9d8d0;
  --accent: #0c756f;
  --accent-dark: #075c58;
  --accent-pale: #d9eeea;
  --warm: #d8794c;
  --danger: #a64639;
  --space-1: .35rem;
  --space-2: .65rem;
  --space-3: 1rem;
  --space-4: 1.5rem;
  --space-5: 2.25rem;
  --space-6: 3.5rem;
  --radius-sm: .55rem;
  --radius-md: .9rem;
  --shadow-low: 0 12px 35px rgba(38, 47, 43, .08);
  --focus: 0 0 0 3px rgba(12, 117, 111, .23);
  color-scheme: light;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: var(--ink);
  background: var(--canvas);
  font-synthesis: none;
  text-rendering: optimizeLegibility;
}

* { box-sizing: border-box; }
html { min-width: 320px; background: var(--canvas); }
body { margin: 0; min-height: 100vh; background: radial-gradient(circle at top right, rgba(218, 238, 234, .48), transparent 34rem), var(--canvas); }
a { color: inherit; }
button, input, select { font: inherit; }
button, a { -webkit-tap-highlight-color: transparent; }
:focus-visible { outline: none; box-shadow: var(--focus); }

.site-header {
  width: min(1180px, calc(100% - 2rem));
  margin: 0 auto;
  min-height: 4.7rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  border-bottom: 1px solid var(--line);
}
.brand { display: inline-flex; align-items: center; gap: .7rem; text-decoration: none; font-weight: 760; letter-spacing: -.02em; }
.brand-muted { color: var(--muted); font-weight: 520; }
.brand-mark { display: grid; place-items: center; width: 2rem; height: 2rem; border-radius: .55rem; background: var(--ink); color: #fffdf8; font-size: .7rem; letter-spacing: .04em; }
.site-nav { display: flex; align-items: center; gap: .2rem; }
.site-nav a { min-height: 2.75rem; display: inline-flex; align-items: center; padding: .55rem .85rem; color: var(--muted); text-decoration: none; border-radius: var(--radius-sm); font-size: .9rem; font-weight: 700; }
.site-nav a:hover, .site-nav a[aria-current="page"] { color: var(--accent-dark); background: var(--accent-pale); }

#app { width: min(1180px, calc(100% - 2rem)); margin: 0 auto; padding: var(--space-6) 0 var(--space-5); }
.page-intro { display: grid; grid-template-columns: minmax(0, 1fr) minmax(280px, .55fr); gap: var(--space-5); align-items: end; padding-bottom: var(--space-5); border-bottom: 1px solid var(--line); }
.eyebrow { margin: 0 0 .8rem; color: var(--accent); font-size: .72rem; font-weight: 800; letter-spacing: .13em; text-transform: uppercase; }
h1, h2, h3, p { margin-top: 0; }
h1 { max-width: 15ch; margin-bottom: .9rem; font-size: clamp(2.4rem, 7vw, 5.3rem); line-height: .95; letter-spacing: -.065em; }
h2 { margin-bottom: .5rem; font-size: clamp(1.25rem, 2vw, 1.55rem); letter-spacing: -.03em; }
h3 { margin-bottom: .35rem; font-size: 1rem; }
.lede { max-width: 56ch; margin-bottom: 0; color: var(--muted); font-size: 1.03rem; line-height: 1.6; }
.source-summary { align-self: stretch; display: flex; flex-direction: column; justify-content: end; gap: .65rem; padding-left: var(--space-4); border-left: 2px solid var(--accent); }
.source-kicker { color: var(--muted); font-size: .75rem; font-weight: 800; text-transform: uppercase; letter-spacing: .08em; }
.source-title { margin: 0; font-size: 1.05rem; font-weight: 750; line-height: 1.35; }
.source-meta { margin: 0; color: var(--muted); font-size: .85rem; line-height: 1.5; }
.source-meta code { color: var(--ink); font-size: .74rem; overflow-wrap: anywhere; }

.home-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: var(--space-4); margin-top: var(--space-5); }
.home-link { display: flex; min-height: 13rem; flex-direction: column; justify-content: space-between; padding: var(--space-4); border: 1px solid var(--line); border-radius: var(--radius-md); background: rgba(255, 253, 248, .64); text-decoration: none; transition: transform .18s ease, border-color .18s ease, background .18s ease; }
.home-link:hover { transform: translateY(-3px); border-color: rgba(12, 117, 111, .42); background: var(--surface); }
.home-link strong { font-size: 1.45rem; letter-spacing: -.03em; }
.home-link p { max-width: 36ch; margin: .5rem 0 0; color: var(--muted); line-height: 1.5; }
.home-arrow { color: var(--accent); font-size: 1.3rem; }

.data-strip { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 1px; margin: var(--space-5) 0; overflow: hidden; border: 1px solid var(--line); border-radius: var(--radius-md); background: var(--line); box-shadow: var(--shadow-low); }
.data-stat { min-height: 5.5rem; padding: 1rem; background: var(--surface); }
.data-stat-label { display: block; margin-bottom: .45rem; color: var(--muted); font-size: .72rem; font-weight: 800; letter-spacing: .08em; text-transform: uppercase; }
.data-stat-value { display: block; font-size: 1.5rem; font-weight: 800; letter-spacing: -.04em; font-variant-numeric: tabular-nums; }

.toolbar { display: flex; align-items: end; justify-content: space-between; gap: var(--space-3); margin: var(--space-5) 0 var(--space-4); }
.search-wrap { flex: 1; max-width: 38rem; }
.control-label { display: block; margin-bottom: .45rem; color: var(--muted); font-size: .76rem; font-weight: 800; letter-spacing: .06em; text-transform: uppercase; }
.search-input, .select-input { width: 100%; min-height: 2.9rem; padding: .7rem .85rem; border: 1px solid var(--line); border-radius: var(--radius-sm); color: var(--ink); background: var(--surface); }
.search-input::placeholder { color: #899396; }
.search-input:hover, .select-input:hover { border-color: #9db9b6; }
.quiet-button { min-height: 2.9rem; padding: .65rem .95rem; border: 1px solid var(--line); border-radius: var(--radius-sm); color: var(--muted); background: transparent; cursor: pointer; font-weight: 700; }
.quiet-button:hover { color: var(--accent-dark); border-color: #9db9b6; background: var(--accent-pale); }
.result-count { color: var(--muted); font-size: .88rem; font-variant-numeric: tabular-nums; white-space: nowrap; }

.section-block { margin-top: var(--space-5); }
.section-heading { display: flex; align-items: baseline; justify-content: space-between; gap: 1rem; padding-bottom: .75rem; border-bottom: 2px solid var(--ink); }
.section-heading p { margin: 0; color: var(--muted); font-size: .85rem; }
.exam-list { border-bottom: 1px solid var(--line); }
.exam-row { display: grid; grid-template-columns: 5rem minmax(12rem, 1fr) minmax(14rem, 1fr) minmax(13rem, 1fr); gap: var(--space-3); align-items: center; padding: 1rem 0; border-bottom: 1px solid var(--line); }
.exam-row:last-child { border-bottom: 0; }
.exam-code { color: var(--accent-dark); font-size: 1.15rem; font-weight: 850; letter-spacing: -.03em; }
.exam-age { font-weight: 730; }
.exam-detail { color: var(--muted); font-size: .9rem; line-height: 1.45; }
.exam-detail strong { display: block; margin-bottom: .2rem; color: var(--ink); font-size: .72rem; letter-spacing: .08em; text-transform: uppercase; }
.not-stated { color: #899396; font-style: italic; }

.source-notes { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: var(--space-4); margin-top: var(--space-6); padding-top: var(--space-4); border-top: 1px solid var(--line); }
.note-list { margin: 0; padding: 0; list-style: none; }
.note-list li { padding: .8rem 0; border-bottom: 1px solid var(--line); color: var(--muted); line-height: 1.5; }
.note-list li:last-child { border-bottom: 0; }
.note-applies { display: block; margin-bottom: .25rem; color: var(--accent-dark); font-size: .76rem; font-weight: 800; text-transform: uppercase; letter-spacing: .07em; }

.stiko-controls { display: grid; grid-template-columns: minmax(14rem, 1fr) auto auto; align-items: end; gap: var(--space-3); }
.panel-select { min-width: 18rem; }
.check-control { display: flex; min-height: 2.9rem; align-items: center; gap: .55rem; padding: .65rem .8rem; color: var(--muted); font-size: .86rem; font-weight: 700; cursor: pointer; }
.check-control input { width: 1.1rem; height: 1.1rem; accent-color: var(--accent); }
.matrix-scroll { margin-top: var(--space-4); overflow-x: auto; border: 1px solid var(--line); border-radius: var(--radius-md); background: var(--surface); box-shadow: var(--shadow-low); }
.matrix { width: 100%; min-width: 940px; border-collapse: collapse; table-layout: fixed; }
.matrix th, .matrix td { border-right: 1px solid rgba(217, 216, 208, .72); border-bottom: 1px solid rgba(217, 216, 208, .72); }
.matrix th:last-child, .matrix td:last-child { border-right: 0; }
.matrix thead th { height: 4.2rem; padding: .65rem .4rem; color: var(--muted); background: var(--surface-soft); font-size: .72rem; line-height: 1.2; text-align: center; vertical-align: bottom; }
.matrix thead th:first-child { width: 14.5rem; text-align: left; }
.matrix tbody th { position: sticky; left: 0; z-index: 1; padding: .8rem .9rem; background: var(--surface); font-size: .86rem; font-weight: 760; line-height: 1.25; text-align: left; }
.matrix tbody tr:last-child th, .matrix tbody tr:last-child td { border-bottom: 0; }
.matrix td { height: 3.4rem; padding: .35rem; text-align: center; vertical-align: middle; }
.matrix .cell-marker { display: inline-flex; min-width: 2.15rem; min-height: 2rem; align-items: center; justify-content: center; padding: .18rem .28rem; border-radius: .4rem; color: #14383a; font-size: .72rem; font-weight: 850; line-height: 1.1; }
.matrix td.recommended_time { background: #709ed4; }
.matrix td.mAk_period { background: #a5bde4; }
.matrix td.catch_up_period { background: #d3def2; }
.matrix td.unclassified_fill { background: #dee6f5; }
.matrix td.not_highlighted { background: #ececec; }
.matrix td:not(.not_highlighted):hover { filter: saturate(1.18) brightness(.98); }
.matrix td.not_highlighted .cell-marker { color: var(--muted); }
.matrix-caption { display: flex; align-items: center; justify-content: space-between; gap: 1rem; margin-top: .7rem; color: var(--muted); font-size: .82rem; }
.legend { display: flex; flex-wrap: wrap; gap: .55rem 1rem; margin-top: var(--space-4); }
.legend-item { display: inline-flex; align-items: center; gap: .45rem; color: var(--muted); font-size: .78rem; }
.legend-swatch { width: .85rem; height: .85rem; border-radius: .2rem; border: 1px solid rgba(29, 42, 45, .12); }
.legend-swatch.recommended_time { background: #709ed4; }
.legend-swatch.mAk_period { background: #a5bde4; }
.legend-swatch.catch_up_period { background: #d3def2; }

.callout { display: flex; gap: .9rem; align-items: flex-start; margin: var(--space-4) 0; padding: 1rem 1.1rem; border-left: 3px solid var(--warm); background: rgba(255, 253, 248, .7); }
.callout-label { flex: 0 0 auto; color: var(--warm); font-size: .75rem; font-weight: 850; letter-spacing: .08em; text-transform: uppercase; }
.callout p { margin: 0; color: var(--muted); line-height: 1.5; }
.footnotes { margin-top: var(--space-5); border-top: 1px solid var(--line); }
.footnotes summary { padding: 1rem 0; color: var(--accent-dark); cursor: pointer; font-weight: 800; }
.footnote-list { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 0 var(--space-5); margin: 0; padding: 0 0 var(--space-4); list-style: none; }
.footnote-list li { display: grid; grid-template-columns: 1.5rem 1fr; gap: .6rem; padding: .65rem 0; border-bottom: 1px solid var(--line); color: var(--muted); font-size: .88rem; line-height: 1.45; }
.footnote-code { color: var(--accent-dark); font-weight: 850; }

.loading-state, .empty-state, .error-state { display: flex; min-height: 18rem; align-items: center; justify-content: center; gap: .7rem; color: var(--muted); }
.error-state { flex-direction: column; text-align: center; }
.error-state strong { color: var(--danger); }
.spinner { width: 1rem; height: 1rem; border: 2px solid var(--line); border-top-color: var(--accent); border-radius: 50%; animation: spin .8s linear infinite; }
.site-footer { width: min(1180px, calc(100% - 2rem)); margin: 0 auto; display: flex; justify-content: space-between; gap: 1rem; padding: 1rem 0 1.8rem; border-top: 1px solid var(--line); color: var(--muted); font-size: .74rem; }
.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; }

@keyframes spin { to { transform: rotate(360deg); } }
@media (prefers-reduced-motion: reduce) { *, *::before, *::after { scroll-behavior: auto !important; animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; } }
@media (max-width: 800px) {
  #app { padding-top: var(--space-5); }
  .page-intro { grid-template-columns: 1fr; gap: var(--space-4); }
  .source-summary { padding: .8rem 0 0; border-top: 2px solid var(--accent); border-left: 0; }
  h1 { max-width: 12ch; }
  .data-strip { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .exam-row { grid-template-columns: 4rem minmax(0, 1fr); gap: .5rem 1rem; }
  .exam-detail { grid-column: 2; }
  .toolbar, .stiko-controls { align-items: stretch; flex-direction: column; grid-template-columns: 1fr; }
  .search-wrap, .panel-select { max-width: none; min-width: 0; }
  .result-count { align-self: start; }
  .source-notes, .footnote-list { grid-template-columns: 1fr; }
}
@media (max-width: 520px) {
  .site-header { min-height: 4.2rem; }
  .brand-muted { display: none; }
  .site-nav a { padding-inline: .6rem; font-size: .82rem; }
  .home-grid { grid-template-columns: 1fr; }
  .data-stat { min-height: 4.8rem; padding: .8rem; }
  .data-stat-value { font-size: 1.25rem; }
  .site-footer { flex-direction: column; gap: .3rem; }
}