/* Vasul care trebuia să dispară — explicator despre artera mediană persistentă.
   Dual theme from day one. All colours through semantic variables. */

:root {
  color-scheme: light;
  --bg: #f6f1e7;
  --bg-raised: #fffcf5;
  --bg-sunken: #ece3d1;
  --fg: #201a16;
  --fg-soft: #4a4038;
  --fg-faint: #675c50;
  --line: rgba(32, 26, 22, 0.16);
  --line-strong: rgba(32, 26, 22, 0.38);
  --shadow: rgba(32, 26, 22, 0.14);
  --accent: #0e8f7a;
  --on-accent: #ffffff;
  --link: #0a5a50;
  --ok: #0e8f7a;
  --ok-soft: #dcefe9;
  --ok-ink: #054d42;
  --warn: #8a5f08;
  --warn-soft: #f5e7c8;
  --signal: #a8332a;
  --signal-soft: #f6e0dc;
  --signal-ink: #8c0f0a;
  --focus: #0e8f7a;
  --serif: "Iowan Old Style", "Palatino Linotype", Palatino, Georgia, "Times New Roman", serif;
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "Helvetica Neue", Arial, sans-serif;
  --mono: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  --container: 70ch;
  --wide: 1120px;
  --radius: 14px;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    color-scheme: dark;
    --bg: #16120d;
    --bg-raised: #1e1811;
    --bg-sunken: #0e0b07;
    --fg: #f3ede2;
    --fg-soft: #cabfb0;
    --fg-faint: #a89b8a;
    --line: rgba(243, 237, 226, 0.16);
    --line-strong: rgba(243, 237, 226, 0.4);
    --shadow: rgba(0, 0, 0, 0.55);
    --accent: #3db39a;
    --on-accent: #062420;
    --link: #3db39a;
    --ok: #3db39a;
    --ok-soft: #123128;
    --ok-ink: #6cd0bc;
    --warn: #c9a832;
    --warn-soft: #332907;
    --signal: #d9697c;
    --signal-soft: #341118;
    --signal-ink: #eb928b;
    --focus: #7fd9c4;
  }
}

:root[data-theme="dark"] {
  color-scheme: dark;
  --bg: #16120d;
  --bg-raised: #1e1811;
  --bg-sunken: #0e0b07;
  --fg: #f3ede2;
  --fg-soft: #cabfb0;
  --fg-faint: #a89b8a;
  --line: rgba(243, 237, 226, 0.16);
  --line-strong: rgba(243, 237, 226, 0.4);
  --shadow: rgba(0, 0, 0, 0.55);
  --accent: #3db39a;
  --on-accent: #062420;
  --link: #3db39a;
  --ok: #3db39a;
  --ok-soft: #123128;
  --ok-ink: #6cd0bc;
  --warn: #c9a832;
  --warn-soft: #332907;
  --signal: #d9697c;
  --signal-soft: #341118;
  --signal-ink: #eb928b;
  --focus: #7fd9c4;
}

:root[data-theme="light"] {
  color-scheme: light;
  --on-accent: #ffffff;
  --link: #0a5a50;
  --ok-ink: #054d42;
  --signal-ink: #8c0f0a;
}

* { box-sizing: border-box; }

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

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: var(--sans);
  font-size: 1.0625rem;
  line-height: 1.65;
}

h1, h2, h3 {
  font-family: var(--serif);
  font-weight: 600;
  line-height: 1.2;
  letter-spacing: 0.001em;
}

a { color: var(--link); }
a:hover { text-decoration-thickness: 2px; }

:focus-visible {
  outline: 3px solid var(--focus);
  outline-offset: 3px;
  border-radius: 4px;
}

.visually-hidden {
  position: absolute !important;
  width: 1px; height: 1px;
  margin: -1px; padding: 0; border: 0;
  clip: rect(0 0 0 0); clip-path: inset(50%);
  overflow: hidden; white-space: nowrap;
}

.wrap {
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: 1.25rem;
}

.wrap-wide {
  max-width: var(--wide);
  margin-inline: auto;
  padding-inline: 1.25rem;
}

/* Top bar */

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  max-width: var(--wide);
  margin-inline: auto;
  padding: 0.9rem 1.25rem;
  border-bottom: 1px solid var(--line);
}

.brand {
  font-family: var(--serif);
  font-size: 1.05rem;
  color: var(--fg);
  text-decoration: none;
}

.topbar-tools { display: flex; align-items: center; gap: 0.75rem; }

.lang-switch { display: flex; gap: 0.25rem; }
.lang-switch a {
  padding: 0.3rem 0.6rem;
  border-radius: 8px;
  text-decoration: none;
  font-weight: 600;
  font-size: 0.9rem;
  color: var(--fg-soft);
  border: 1px solid transparent;
}
.lang-switch a[aria-current="page"] {
  color: var(--fg);
  border-color: var(--line-strong);
  background: var(--bg-raised);
}

.theme-toggle {
  font: inherit;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--fg);
  background: var(--bg-raised);
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  padding: 0.35rem 0.85rem;
  cursor: pointer;
  min-height: 44px;
}

/* Hero */

.hero {
  border-bottom: 1px solid var(--line);
  background: linear-gradient(to bottom, var(--ok-soft), transparent 22rem);
}

.hero-inner {
  max-width: var(--container);
  margin-inline: auto;
  padding: 3rem 1.25rem 2.25rem;
}

.kicker {
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--fg-soft);
  margin: 0 0 1rem;
}

.hero h1 {
  font-size: clamp(2.3rem, 6.6vw, 3.75rem);
  margin: 0 0 1rem;
}

.deck {
  font-size: 1.2rem;
  line-height: 1.6;
  color: var(--fg-soft);
  margin: 0 0 1.5rem;
  max-width: 58ch;
}
.deck strong { color: var(--fg); }

.fact-strip {
  list-style: none;
  margin: 0;
  padding: 1rem 1.1rem;
  background: var(--bg-raised);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: 0 1px 6px var(--shadow);
  font-size: 0.95rem;
  display: grid;
  gap: 0.45rem;
}
.fact-strip li { display: flex; gap: 0.6rem; }
.fact-strip li::before { content: "–"; color: var(--fg-faint); }
.fact-strip .tag {
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--ok-ink);
  background: var(--ok-soft);
  border-radius: 6px;
  padding: 0.15rem 0.5rem;
  white-space: nowrap;
  align-self: flex-start;
}

/* Sections */

main section { padding-block: 2.75rem; }
main section + section { border-top: 1px solid var(--line); }

section h2 {
  font-size: clamp(1.55rem, 3.8vw, 2.15rem);
  margin: 0 0 0.75rem;
}

.lede {
  font-size: 1.12rem;
  color: var(--fg-soft);
  max-width: 60ch;
}

/* Interactive figure card (embryology + adult anatomy) */

.figure-card {
  background: var(--bg-raised);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: 0 2px 14px var(--shadow);
  padding: 1.25rem;
  margin-top: 1.5rem;
  display: grid;
  gap: 1.1rem;
}
@media (min-width: 780px) {
  .figure-card.with-figure { grid-template-columns: minmax(200px, 260px) 1fr; align-items: start; }
}

.figure-stage { display: grid; gap: 0.75rem; justify-items: center; }
.limb-svg { width: 100%; max-width: 260px; height: auto; display: block; }
.limb-svg .outline { fill: none; stroke: var(--fg); stroke-width: 3; stroke-linejoin: round; stroke-linecap: round; opacity: 0.82; }
.limb-svg .tunnel-zone { fill: var(--signal-soft); stroke: var(--signal); stroke-width: 1.4; stroke-dasharray: 4 3; opacity: 0; transition: opacity 0.3s ease; }
.limb-svg .tunnel-zone.show { opacity: 1; }
.limb-svg .vessel { fill: none; stroke-linecap: round; stroke-linejoin: round; stroke-width: 5.5; transition: opacity 0.3s ease, stroke 0.3s ease; }
.limb-svg .vessel.radial, .limb-svg .vessel.ulnar { stroke: var(--ok); }
.limb-svg .vessel.median { stroke: var(--fg-faint); }
.limb-svg .vessel.median.type-antebrachial { stroke: var(--warn); }
.limb-svg .vessel.median.type-palmar { stroke: var(--signal); }
.limb-svg .vessel.median.type-none { opacity: 0; }
.limb-svg .endpoint { fill: var(--bg-raised); stroke-width: 3; r: 5; opacity: 0; transition: opacity 0.3s ease; }
.limb-svg .endpoint.show { opacity: 1; }
.limb-svg .endpoint.warn { stroke: var(--warn); }
.limb-svg .endpoint.signal { stroke: var(--signal); fill: var(--signal); }
.limb-svg .label-leader { stroke: var(--line-strong); stroke-width: 1.2; opacity: 0; transition: opacity 0.3s ease; }
.limb-svg .label-leader.show { opacity: 1; }
.limb-svg .label-text { font-family: var(--sans); font-size: 10.5px; fill: var(--fg-soft); }

.embryo-svg .bud { fill: var(--ok-soft); stroke: var(--fg); stroke-width: 3; stroke-linejoin: round; opacity: 0.9; }
.embryo-svg .vessel { fill: none; stroke-linecap: round; stroke-width: 5; transition: opacity 0.35s ease, stroke 0.35s ease; }
.embryo-svg .vessel.radial-e, .embryo-svg .vessel.ulnar-e { stroke: var(--ok); transition: opacity 0.35s ease; }
.embryo-svg .vessel.median-e.neutral { stroke: var(--fg-faint); }
.embryo-svg .vessel.median-e.persist { stroke: var(--signal); }
.embryo-svg .vessel.median-e.ghost { stroke: var(--fg-faint); stroke-dasharray: 2 5; }
.embryo-svg .vessel.median-e.trunk-only { stroke: var(--fg-faint); }
.embryo-svg .trunk { fill: none; stroke: var(--fg-faint); stroke-width: 5; stroke-linecap: round; transition: opacity 0.35s ease; }

.figure-side { display: grid; gap: 1rem; align-content: start; }

.mode-toggle { border: 0; margin: 0; padding: 0; display: grid; gap: 0.5rem; }
.mode-toggle legend { font-weight: 700; font-size: 0.95rem; margin: 0 0 0.15rem; padding: 0; }
.mode-list { display: grid; gap: 0.5rem; }
@media (min-width: 480px) { .mode-list { grid-template-columns: repeat(var(--modes, 3), 1fr); } }
.mode-list label {
  display: grid;
  gap: 0.2rem;
  border: 1px solid var(--line-strong);
  border-radius: 10px;
  padding: 0.6rem 0.75rem;
  cursor: pointer;
  font-size: 0.88rem;
  background: var(--bg-raised);
}
.mode-list label:has(input:checked) {
  border-color: var(--accent);
  border-width: 2px;
  padding: calc(0.6rem - 1px) calc(0.75rem - 1px);
}
.mode-list input { accent-color: var(--accent); width: 1.1rem; height: 1.1rem; }
.mode-list .sub { color: var(--fg-soft); font-size: 0.8rem; }
.mode-list .swatch { display: inline-block; width: 0.7rem; height: 0.7rem; border-radius: 50%; margin-inline-end: 0.35rem; vertical-align: middle; }

.scrub { display: grid; gap: 0.35rem; }
.scrub label { font-weight: 600; font-size: 0.95rem; }
.scrub input[type="range"] {
  width: 100%;
  accent-color: var(--accent);
  min-height: 44px;
}
.scrub .scale {
  display: flex;
  justify-content: space-between;
  font-size: 0.8rem;
  color: var(--fg-soft);
}

.info-card {
  border: 1px solid var(--line);
  border-left: 6px solid var(--accent);
  border-radius: 10px;
  padding: 0.9rem 1rem;
  background: var(--bg);
  display: grid;
  gap: 0.4rem;
}
.info-card[data-tone="warn"] { border-left-color: var(--warn); }
.info-card[data-tone="signal"] { border-left-color: var(--signal); }
.info-card h3 { margin: 0; font-size: 1.08rem; }
.info-card p { margin: 0; font-size: 0.95rem; }
.info-card .stat { font-family: var(--mono); font-size: 0.85rem; color: var(--fg-soft); }

/* Pictogram */

.pictogram {
  display: grid;
  grid-template-columns: repeat(10, 1fr);
  gap: 4px;
  max-width: 340px;
  margin: 1rem 0;
}
.pictogram .dot {
  aspect-ratio: 1;
  border-radius: 50%;
  background: var(--bg-sunken);
  border: 1px solid var(--line);
}
.pictogram .dot.antebrachial { background: var(--warn); border-color: var(--warn); }
.pictogram .dot.palmar { background: var(--signal); border-color: var(--signal); }
.pictogram-legend { display: flex; flex-wrap: wrap; gap: 0.9rem; font-size: 0.88rem; color: var(--fg-soft); margin-top: 0.5rem; }
.pictogram-legend span { display: inline-flex; align-items: center; gap: 0.4rem; }
.pictogram-legend i { width: 0.75rem; height: 0.75rem; border-radius: 50%; display: inline-block; }
.pictogram-legend .sw-typical { background: var(--bg-sunken); border: 1px solid var(--line); }
.pictogram-legend .sw-ante { background: var(--warn); }
.pictogram-legend .sw-palmar { background: var(--signal); }

/* Bar comparison */

.bar-compare { display: grid; gap: 1.1rem; margin-top: 1.25rem; }
.bar-row { display: grid; gap: 0.4rem; }
.bar-row-head { display: flex; justify-content: space-between; align-items: baseline; gap: 0.75rem; flex-wrap: wrap; }
.bar-row-head h4 { margin: 0; font-size: 1rem; }
.sig-tag {
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  border-radius: 6px;
  padding: 0.12rem 0.5rem;
  white-space: nowrap;
}
.sig-tag.sig-yes { color: var(--signal-ink); background: var(--signal-soft); }
.sig-tag.sig-no { color: var(--fg-soft); background: var(--bg-sunken); }
.bar-pair { display: grid; gap: 0.5rem; }
.bar-track { display: grid; grid-template-columns: 11rem 1fr auto; align-items: center; gap: 0.6rem; }
.bar-track .bar-label { font-size: 0.88rem; color: var(--fg-soft); }
.bar-track .bar-outer { background: var(--bg-sunken); border-radius: 6px; height: 1.1rem; overflow: hidden; }
.bar-track .bar-fill { height: 100%; border-radius: 6px 0 0 6px; background: var(--fg-faint); }
.bar-track.is-present .bar-fill { background: var(--signal); }
.bar-track .bar-val { font-family: var(--mono); font-size: 0.88rem; white-space: nowrap; }

/* Variance bars (secondary finding) */

.variance-bars { display: grid; gap: 1rem; margin-top: 1.25rem; max-width: 40rem; }
.variance-row { display: grid; gap: 0.35rem; }
.variance-row .vr-head { display: flex; justify-content: space-between; font-size: 0.92rem; }
.variance-row .vr-head strong { font-family: var(--mono); }
.variance-outer { background: var(--bg-sunken); border-radius: 6px; height: 0.85rem; overflow: hidden; }
.variance-fill { height: 100%; background: var(--accent); border-radius: 6px 0 0 6px; }

/* Archival figure */

.archival-figure {
  margin: 1.5rem 0 0;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--bg-raised);
  max-width: 22rem;
}
.archival-figure img { display: block; width: 100%; height: auto; }
.archival-figure figcaption {
  padding: 0.75rem 0.9rem;
  font-size: 0.85rem;
  color: var(--fg-soft);
  border-top: 1px solid var(--line);
}

/* Thesis columns, reused */

.two-col { display: grid; gap: 1rem; margin-top: 1.25rem; }
@media (min-width: 720px) { .two-col { grid-template-columns: 1fr 1fr; } }
.two-col article {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1.1rem 1.2rem;
  background: var(--bg-raised);
}
.two-col h3 { margin-top: 0; font-size: 1.2rem; }
.two-col ul { margin: 0.5rem 0; padding-left: 1.2rem; }
.two-col li { margin-bottom: 0.4rem; }

/* Callouts */

.callout {
  border: 1px solid var(--line-strong);
  border-radius: 10px;
  padding: 0.9rem 1.1rem;
  margin-top: 1.25rem;
  font-size: 0.96rem;
  background: var(--bg-raised);
}
.callout strong { color: var(--fg); }
.callout--warn { background: var(--warn-soft); border-color: transparent; }
.callout--signal { background: var(--signal-soft); border-color: transparent; }

/* Accessible fallback */

.timeline-fallback { margin-top: 1.5rem; }
.timeline-fallback ol {
  list-style: none;
  counter-reset: step;
  margin: 1rem 0;
  padding: 0;
  display: grid;
  gap: 0.8rem;
}
.timeline-fallback li {
  counter-increment: step;
  position: relative;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--bg-raised);
  padding: 0.9rem 1rem 0.9rem 3.4rem;
}
.timeline-fallback li::before {
  content: counter(step);
  position: absolute;
  left: 0.9rem; top: 0.9rem;
  width: 1.7rem; height: 1.7rem;
  border-radius: 50%;
  background: var(--accent);
  color: var(--on-accent);
  font-weight: 700;
  font-size: 0.95rem;
  display: grid;
  place-items: center;
}
.timeline-fallback h3 { margin: 0 0 0.25rem; font-size: 1.1rem; }
.timeline-fallback p { margin: 0.25rem 0; font-size: 0.96rem; }

table.claims {
  width: 100%;
  border-collapse: collapse;
  margin-top: 1.25rem;
  font-size: 0.92rem;
}
table.claims caption { text-align: left; font-weight: 700; padding-bottom: 0.5rem; }
table.claims th, table.claims td {
  border: 1px solid var(--line-strong);
  padding: 0.55rem 0.7rem;
  text-align: left;
  vertical-align: top;
}
table.claims th { background: var(--bg-sunken); }
.table-scroll { overflow-x: auto; }

/* Method */

.method-links { padding-left: 1.2rem; }
.method-links li { margin-bottom: 0.55rem; }
.small { font-size: 0.9rem; color: var(--fg-soft); }

/* Footer */

footer.site {
  border-top: 1px solid var(--line);
  padding: 2rem 0 3rem;
  color: var(--fg-soft);
  font-size: 0.92rem;
}
footer.site .foot-grid {
  max-width: var(--wide);
  margin-inline: auto;
  padding-inline: 1.25rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem 2rem;
  align-items: baseline;
  justify-content: space-between;
}
footer.site nav { display: flex; gap: 1rem; flex-wrap: wrap; }

/* Return to top */

.to-top {
  position: fixed;
  right: 1rem; bottom: 1rem;
  font: inherit;
  font-weight: 700;
  background: var(--bg-raised);
  color: var(--fg);
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  padding: 0.6rem 1rem;
  cursor: pointer;
  box-shadow: 0 2px 10px var(--shadow);
  min-height: 44px;
  display: none;
}
.to-top.show { display: block; }

@media (max-width: 480px) {
  body { font-size: 1rem; }
  .deck { font-size: 1.08rem; }
  .figure-card { padding: 0.9rem; }
  .bar-track { grid-template-columns: 6.5rem 1fr auto; }
}