/* Biomed Guide — no framework, no web fonts, light + dark. */
:root {
  --bg: #f7f8f6;
  --surface: #ffffff;
  --surface-2: #eef3f1;
  --text: #17201d;
  --muted: #55625d;
  --border: #d9e1dd;
  --accent: #0f766e;
  --accent-strong: #0b5e57;
  --on-accent: #ffffff;
  --accent-soft: #dff2ee;
  --ok-bg: #e2f4ea; --ok-fg: #1b6b3a;
  --info-bg: #e5eefb; --info-fg: #24508f;
  --muted-bg: #eceeed; --muted-fg: #4c5652;
  --warn-bg: #fff4e0; --warn-fg: #7a4b00; --warn-border: #f0c97a;
  --danger-bg: #fdecec; --danger-fg: #9b1c1c;
  --radius: 14px;
  --radius-sm: 8px;
  --shadow: 0 1px 2px rgb(16 24 22 / 6%), 0 4px 16px rgb(16 24 22 / 5%);
  --font: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --mono: ui-monospace, "SF Mono", "Cascadia Mono", Consolas, monospace;
  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0f1513;
    --surface: #161e1b;
    --surface-2: #1c2622;
    --text: #e6ece9;
    --muted: #9fb0a9;
    --border: #2a3632;
    --accent: #2dd4bf;
    --accent-strong: #5eead4;
    --on-accent: #062b27;
    --accent-soft: #123a35;
    --ok-bg: #133524; --ok-fg: #8ee0ad;
    --info-bg: #182a45; --info-fg: #9cc2f5;
    --muted-bg: #222b28; --muted-fg: #b3c0bb;
    --warn-bg: #3a2c10; --warn-fg: #f5cf86; --warn-border: #6b5220;
    --danger-bg: #3d1717; --danger-fg: #f6a7a7;
    --shadow: none;
    color-scheme: dark;
  }
}

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 1rem/1.6 var(--font);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}
main { flex: 1; outline: none; }
img, svg { max-width: 100%; }
a { color: var(--accent-strong); text-underline-offset: 0.18em; }
a:hover { color: var(--accent); }
:focus-visible { outline: 3px solid var(--accent); outline-offset: 2px; border-radius: 4px; }
h1, h2, h3, h4 { line-height: 1.2; margin: 0 0 0.5em; letter-spacing: -0.01em; }
h1 { font-size: clamp(1.9rem, 4.5vw, 2.8rem); }
h2 { font-size: clamp(1.35rem, 2.6vw, 1.7rem); }
h3 { font-size: 1.15rem; }
h4 { font-size: 1.05rem; }
p { margin: 0 0 1em; }
ul, ol { padding-left: 1.25rem; }
[hidden] { display: none !important; }

.wrap { width: min(72rem, 100% - 2rem); margin-inline: auto; }
.section { margin-block: 2.75rem; }
.section-lead { color: var(--muted); max-width: 46rem; }
.muted { color: var(--muted); }
.mono { font-family: var(--mono); font-variant-numeric: tabular-nums; }
.fineprint { color: var(--muted); font-size: 0.875rem; }
.icon { width: 1.15em; height: 1.15em; flex: none; vertical-align: -0.2em; }
.icon-sm { width: 0.95em; height: 0.95em; }

.skip { position: absolute; left: -999px; top: 0.5rem; background: var(--surface); padding: 0.5rem 1rem; z-index: 10; border-radius: var(--radius-sm); }
.skip:focus { left: 0.5rem; }

/* Header / footer */
.site-header { background: var(--surface); border-bottom: 1px solid var(--border); position: sticky; top: 0; z-index: 5; }
.header-row { display: flex; align-items: center; gap: 1rem; min-height: 4rem; flex-wrap: wrap; }
.brand { display: inline-flex; align-items: center; gap: 0.6rem; font-weight: 700; font-size: 1.1rem; color: var(--text); text-decoration: none; }
.logo { width: 2rem; height: 2rem; flex: none; }
.main-nav { margin-left: auto; }
.main-nav ul { display: flex; flex-wrap: wrap; gap: 0.25rem 1.1rem; list-style: none; margin: 0; padding: 0; }
.main-nav a { color: var(--text); text-decoration: none; font-weight: 500; font-size: 0.95rem; }
.main-nav a:hover { color: var(--accent); text-decoration: underline; }
.lang-switch { border: 1px solid var(--border); padding: 0.3rem 0.75rem; border-radius: 999px; text-decoration: none; font-size: 0.9rem; font-weight: 600; }
@media (max-width: 720px) {
  .header-row { padding-block: 0.6rem; }
  .main-nav { order: 3; width: 100%; margin-left: 0; }
  .lang-switch { margin-left: auto; }
}
.site-footer { background: var(--surface); border-top: 1px solid var(--border); margin-top: 3rem; padding-block: 2rem; font-size: 0.9rem; color: var(--muted); }
.footer-grid { display: grid; gap: 1.5rem; grid-template-columns: repeat(auto-fit, minmax(14rem, 1fr)); }
.footer-brand { display: flex; align-items: center; gap: 0.5rem; color: var(--text); }
.footer-brand .logo { width: 1.5rem; height: 1.5rem; }
.footer-links { list-style: none; padding: 0; margin: 0; display: grid; gap: 0.35rem; }

/* Hero */
.hero { background: linear-gradient(180deg, var(--accent-soft), transparent); padding-block: 2.5rem 1rem; }
.hero-grid { display: grid; gap: 2rem; grid-template-columns: minmax(0, 1.2fr) minmax(0, 1fr); align-items: center; }
@media (max-width: 860px) { .hero-grid { grid-template-columns: minmax(0, 1fr); } }
h1, h2, h3 { overflow-wrap: break-word; }
.eyebrow { text-transform: uppercase; letter-spacing: 0.06em; font-size: 0.8rem; font-weight: 700; color: var(--accent-strong); margin-bottom: 0.5rem; display: flex; align-items: center; gap: 0.4rem; }
.lead { font-size: 1.15rem; color: var(--muted); max-width: 44rem; }
.h1-sub { display: block; font-size: 0.5em; font-weight: 500; color: var(--muted); margin-top: 0.35rem; letter-spacing: 0; }
.meta-line { color: var(--muted); margin-bottom: 0.25rem; }
.notice { background: var(--warn-bg); color: var(--warn-fg); border: 1px solid var(--warn-border); padding: 0.6rem 0.9rem; border-radius: var(--radius-sm); display: inline-block; }
.actions { display: flex; flex-wrap: wrap; gap: 0.6rem; margin-top: 1.25rem; }

/* Breadcrumbs */
.crumbs ol { list-style: none; padding: 0; margin: 0 0 1rem; display: flex; flex-wrap: wrap; gap: 0.35rem; font-size: 0.9rem; color: var(--muted); }
.crumbs li + li::before { content: "›"; margin-right: 0.35rem; }

/* Buttons & chips */
.btn { display: inline-flex; align-items: center; gap: 0.45rem; padding: 0.65rem 1.1rem; border-radius: 999px; font: inherit; font-weight: 600; text-decoration: none; border: 1px solid transparent; cursor: pointer; line-height: 1.2; }
.btn-primary { background: var(--accent); color: var(--on-accent); }
.btn-primary:hover { background: var(--accent-strong); color: var(--on-accent); }
.btn-ghost { border-color: var(--border); color: var(--text); background: var(--surface); }
.btn-ghost:hover { border-color: var(--accent); color: var(--accent-strong); }
.chips { display: flex; flex-wrap: wrap; gap: 0.5rem; margin-bottom: 1.25rem; }
.chip { display: inline-flex; align-items: center; gap: 0.35rem; padding: 0.35rem 0.85rem; border-radius: 999px; border: 1px solid var(--border); background: var(--surface); color: var(--text); font: inherit; font-size: 0.9rem; text-decoration: none; cursor: pointer; }
.chip:hover { border-color: var(--accent); }
.chip[aria-pressed="true"] { background: var(--accent); border-color: var(--accent); color: var(--on-accent); }
.chip-n { font-size: 0.8em; background: var(--surface-2); color: var(--muted); border-radius: 999px; padding: 0 0.5em; font-weight: 600; }

/* Badges */
.badge { display: inline-block; font-size: 0.78rem; font-weight: 600; padding: 0.15rem 0.55rem; border-radius: 999px; white-space: nowrap; }
.badge-ok { background: var(--ok-bg); color: var(--ok-fg); }
.badge-info { background: var(--info-bg); color: var(--info-fg); }
.badge-muted { background: var(--muted-bg); color: var(--muted-fg); }

/* Cards & grids */
.grid { list-style: none; padding: 0; margin: 0; display: grid; gap: 1rem; grid-template-columns: repeat(auto-fill, minmax(min(100%, 16.5rem), 1fr)); }
.card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 1.25rem; box-shadow: var(--shadow); }
.grid > .card { position: relative; display: flex; flex-direction: column; transition: border-color 0.15s, transform 0.15s; }
.grid > .card:hover { border-color: var(--accent); }
@media (prefers-reduced-motion: no-preference) { .grid > .card:hover { transform: translateY(-2px); } }
.card-title { margin: 0.35rem 0 0.4rem; font-size: 1.08rem; }
.card-title a { color: var(--text); text-decoration: none; }
.stretched::after { content: ""; position: absolute; inset: 0; border-radius: var(--radius); }
.card-text { color: var(--muted); font-size: 0.95rem; flex: 1; }
.card-meta { display: flex; justify-content: space-between; align-items: center; gap: 0.75rem; flex-wrap: wrap; font-size: 0.85rem; color: var(--muted); margin: 0; }
.go { color: var(--accent-strong); font-weight: 600; display: inline-flex; align-items: center; gap: 0.3rem; }
.tool-type { display: inline-flex; align-items: center; gap: 0.4rem; font-size: 0.8rem; font-weight: 600; color: var(--accent-strong); text-transform: uppercase; letter-spacing: 0.04em; }
.med-icon { width: 2.5rem; height: 2.5rem; display: grid; place-items: center; border-radius: 12px; background: var(--accent-soft); color: var(--accent-strong); }
.med-icon .icon { width: 1.4rem; height: 1.4rem; }
.med-card.is-upcoming { border-style: dashed; }
.stage-when { font-size: 0.8rem; font-weight: 700; text-transform: uppercase; letter-spacing: 0.05em; color: var(--accent-strong); margin: 0; }
.how-item { background: var(--surface-2); border-radius: var(--radius); padding: 1.25rem; }
.how-item p { color: var(--muted); margin: 0; }
.topic { margin-top: 2rem; }
.topic h3 { margin-bottom: 0.25rem; }
.two-col { display: grid; gap: 1rem; grid-template-columns: 1fr 1fr; align-items: start; }
@media (max-width: 760px) { .two-col { grid-template-columns: 1fr; } }
.stack { display: grid; gap: 1rem; }
.remember { border-left: 5px solid var(--accent); }
.remember ul { margin: 0; }
.remember li + li { margin-top: 0.4rem; }
.pro-card { background: var(--surface-2); box-shadow: none; }
.facts { display: grid; grid-template-columns: max-content 1fr; gap: 0.5rem 1.25rem; margin: 0; }
.facts dt { font-weight: 600; }
.facts dd { margin: 0; }
.steps li { margin-bottom: 0.4rem; }
.prose { max-width: 48rem; }
.prose h2 { margin-top: 2rem; }

/* DIN lookup */
.din-card { padding: 1.5rem; }
.din-label { display: block; font-weight: 700; margin-bottom: 0.6rem; }
.din-row { display: flex; gap: 0.5rem; }
.din-input, .text-input {
  flex: 1; min-width: 0; font: inherit; padding: 0.7rem 0.9rem; border-radius: var(--radius-sm);
  border: 1px solid var(--border); background: var(--bg); color: var(--text);
}
.din-input { font-family: var(--mono); font-size: 1.2rem; letter-spacing: 0.18em; }
.din-input::placeholder, .text-input::placeholder { color: var(--muted); opacity: 0.7; letter-spacing: normal; font-family: var(--font); font-size: 1rem; }
[id] { scroll-margin-top: 5.5rem; }
.strengths { font-size: 0.85rem; }
.din-input[aria-invalid="true"] { border-color: var(--danger-fg); }
.din-privacy { font-size: 0.85rem; color: var(--muted); margin: 0.6rem 0 0; }
.din-result:not(:empty) { margin-top: 1rem; padding: 1rem; border-radius: var(--radius-sm); background: var(--surface-2); }
.din-result.is-error { background: var(--danger-bg); color: var(--danger-fg); }
.din-result.is-error a { color: inherit; }
.din-result p:last-child { margin-bottom: 0; }
.din-result-title { font-weight: 700; margin-bottom: 0.2rem; }
.din-result-meta { font-size: 0.9rem; color: var(--muted); }

/* Tables */
.table-wrap { overflow-x: auto; border: 1px solid var(--border); border-radius: var(--radius); background: var(--surface); }
.table-wrap.tall { max-height: 70vh; overflow-y: auto; }
.data-table { width: 100%; border-collapse: collapse; font-size: 0.92rem; }
.data-table th, .data-table td { text-align: left; padding: 0.6rem 0.85rem; border-bottom: 1px solid var(--border); vertical-align: top; }
.data-table thead th { background: var(--surface-2); font-weight: 600; position: sticky; top: 0; z-index: 1; }
.data-table tbody tr:last-child td { border-bottom: 0; }
.data-table tr.is-program td:first-child { box-shadow: inset 4px 0 0 var(--accent); }
.filter-row { display: flex; flex-wrap: wrap; align-items: center; gap: 0.5rem 1rem; margin-bottom: 1rem; }
.filter-row label { font-weight: 600; }
.filter-row .text-input { max-width: 26rem; }

/* Market DINs disclosure */
.market { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 1rem 1.25rem; }
.market summary { cursor: pointer; list-style-position: outside; }
.market summary h2 { display: inline; font-size: 1.25rem; }
.market[open] summary { margin-bottom: 1rem; }

/* Crisis box */
.crisis { background: var(--warn-bg); border: 1px solid var(--warn-border); border-radius: var(--radius); padding: 1.5rem; color: var(--text); }
.crisis h2 { color: var(--warn-fg); font-size: 1.3rem; }
.crisis-list { list-style: none; padding: 0; margin: 0 0 1rem; display: grid; gap: 0.6rem 1.5rem; grid-template-columns: repeat(auto-fit, minmax(15rem, 1fr)); }
.crisis-list li { display: grid; gap: 0.1rem; }
.crisis-line { display: inline-flex; align-items: center; gap: 0.45rem; color: var(--warn-fg); text-decoration: none; font-size: 1.05rem; }
.crisis-line:hover { text-decoration: underline; color: var(--warn-fg); }
.crisis-list span { color: var(--muted); font-size: 0.9rem; }
.crisis-foot { display: flex; flex-wrap: wrap; gap: 0.5rem 1.5rem; font-size: 0.9rem; margin: 0; }
.crisis-foot a { color: var(--warn-fg); }

@media print {
  .site-header, .site-footer, .din-card, .chips { display: none; }
  .card { box-shadow: none; break-inside: avoid; }
}