/* tarko.report public site. Colours follow docs/DESIGN_SYSTEM.md (graphite and blue). */
:root {
  color-scheme: light dark;
  --font-ui: 'Geist', ui-sans-serif, system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'Geist Mono', ui-monospace, 'SF Mono', Menlo, monospace;
  --bg: #F4F4F6;
  --surface: #FFFFFF;
  --surface-2: #F9F9FB;
  --line: #E4E4E8;
  --text: #0B0B0D;
  --text-2: #45454C;
  --text-3: #6A6A73;
  --accent: #0A66D8;
  --accent-ink: #FFFFFF;
  --good: #1E8E3E;
  --bad: #D93025;
  --warn: #B26A00;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #000000;
    --surface: #151517;
    --surface-2: #1C1C1F;
    --line: #2A2A2E;
    --text: #F5F5F7;
    --text-2: #C7C7CC;
    --text-3: #8E8E96;
    --accent: #4C9AFF;
    --accent-ink: #000000;
    --good: #30D158;
    --bad: #FF6B6B;
    --warn: #FFB020;
  }
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 400 16px/1.6 var(--font-ui);
  -webkit-font-smoothing: antialiased;
}
a { color: var(--accent); text-underline-offset: 3px; }
a:hover { text-decoration-thickness: 2px; }
img, svg { display: block; }
.wrap { max-width: 1040px; margin: 0 auto; padding: 0 20px; }
.prose-wrap { max-width: 760px; }

/* header and footer */
.site-head { position: sticky; top: 0; z-index: 5; background: color-mix(in srgb, var(--bg) 82%, transparent); backdrop-filter: saturate(1.6) blur(14px); -webkit-backdrop-filter: saturate(1.6) blur(14px); border-bottom: 1px solid var(--line); }
.site-head .wrap { display: flex; align-items: center; justify-content: space-between; height: 60px; gap: 16px; }
.brand { display: flex; align-items: center; gap: 10px; color: var(--text); text-decoration: none; font-weight: 600; letter-spacing: -.01em; font-size: 17px; }
.brand svg { width: 28px; height: 28px; }
.site-nav { display: flex; gap: 20px; font-size: 14px; }
.site-nav a { color: var(--text-2); text-decoration: none; }
.site-nav a:hover { color: var(--text); }
.site-foot { border-top: 1px solid var(--line); margin-top: 72px; padding: 28px 0 40px; color: var(--text-3); font-size: 14px; }
.site-foot .wrap { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 12px 24px; }
.site-foot nav { display: flex; gap: 20px; }
.site-foot a { color: var(--text-2); text-decoration: none; }

/* homepage */
.hero { padding: 72px 0 40px; }
.eyebrow { display: inline-flex; align-items: center; gap: 8px; font-size: 13px; color: var(--text-2); border: 1px solid var(--line); background: var(--surface); padding: 4px 12px; border-radius: 999px; }
.eyebrow::before { content: ''; width: 7px; height: 7px; border-radius: 50%; background: var(--good); }
h1 { font-size: clamp(34px, 6vw, 56px); line-height: 1.08; letter-spacing: -.03em; font-weight: 600; margin: 20px 0 16px; max-width: 16ch; }
.lede { font-size: clamp(17px, 2.2vw, 20px); color: var(--text-2); max-width: 60ch; margin: 0 0 28px; }
.cta { display: flex; flex-wrap: wrap; gap: 12px; }
.btn { display: inline-flex; align-items: center; justify-content: center; min-height: 44px; padding: 0 20px; border-radius: 12px; font-weight: 500; font-size: 15px; text-decoration: none; border: 1px solid var(--line); background: var(--surface); color: var(--text); }
.btn.primary { background: var(--accent); border-color: var(--accent); color: var(--accent-ink); }
.section { padding: 40px 0 8px; }
.section h2 { font-size: 26px; letter-spacing: -.02em; font-weight: 600; margin: 0 0 8px; }
.section > .wrap > p { color: var(--text-2); max-width: 64ch; margin: 0 0 24px; }
.grid { display: grid; gap: 14px; grid-template-columns: 1fr; }
@media (min-width: 640px) { .grid { grid-template-columns: 1fr 1fr; } }
@media (min-width: 960px) { .grid.three { grid-template-columns: 1fr 1fr 1fr; } }
.card { background: var(--surface); border: 1px solid var(--line); border-radius: 20px; padding: 22px; }
.card h3 { font-size: 17px; margin: 0 0 6px; letter-spacing: -.01em; font-weight: 600; }
.card p { margin: 0; color: var(--text-2); font-size: 15px; }
.sources { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 4px; }
.sources span { border: 1px solid var(--line); background: var(--surface); border-radius: 999px; padding: 6px 14px; font-size: 14px; color: var(--text-2); }
.note { background: var(--surface-2); border: 1px solid var(--line); border-radius: 20px; padding: 22px; }
.note p { margin: 0 0 10px; color: var(--text-2); }
.note p:last-child { margin: 0; }

/* legal pages */
.legal { padding: 48px 0 0; }
.legal h1 { font-size: clamp(30px, 5vw, 42px); max-width: none; margin: 0 0 8px; }
.legal .meta { color: var(--text-3); font-size: 14px; margin: 0 0 28px; }
.legal h2 { font-size: 21px; letter-spacing: -.01em; margin: 40px 0 10px; font-weight: 600; scroll-margin-top: 80px; }
.legal h3 { font-size: 17px; margin: 24px 0 8px; font-weight: 600; scroll-margin-top: 80px; }
.legal p, .legal li { color: var(--text-2); }
.legal strong { color: var(--text); font-weight: 600; }
.legal ul { padding-left: 22px; }
.legal li { margin: 4px 0; }
.legal .toc { background: var(--surface); border: 1px solid var(--line); border-radius: 20px; padding: 18px 22px; }
.legal .toc ol { margin: 0; padding-left: 20px; columns: 1; }
@media (min-width: 640px) { .legal .toc ol { columns: 2; column-gap: 32px; } }
.legal .toc li { margin: 3px 0; font-size: 15px; break-inside: avoid; }
.legal .callout { background: var(--surface); border: 1px solid var(--line); border-left: 3px solid var(--accent); border-radius: 12px; padding: 14px 18px; margin: 16px 0; }
.legal .callout p { margin: 0; }
.table-scroll { overflow-x: auto; margin: 12px 0; border: 1px solid var(--line); border-radius: 12px; background: var(--surface); }
.legal table { border-collapse: collapse; width: 100%; font-size: 14px; min-width: 560px; }
.legal th, .legal td { text-align: left; vertical-align: top; padding: 10px 14px; border-bottom: 1px solid var(--line); }
.legal th { color: var(--text); font-weight: 600; background: var(--surface-2); }
.legal tr:last-child td { border-bottom: 0; }
.legal td { color: var(--text-2); }
code { font-family: var(--font-mono); font-size: .9em; background: var(--surface-2); border: 1px solid var(--line); border-radius: 6px; padding: 1px 5px; }