/* Ol Chiki (Santali) and Meetei Mayek (Manipuri) are missing from many computers. These are tiny
   self-hosted subsets of Noto Sans (SIL OFL, fonts/OFL.txt) holding only the letters this site uses;
   unicode-range means a browser downloads one only when that script is on the page. */
@font-face {
  font-family: "LG Ol Chiki";
  src: url("/fonts/noto-sans-olchiki-subset.woff2") format("woff2");
  unicode-range: U+1C50-1C7F;
  font-display: swap;
}
@font-face {
  font-family: "LG Meetei Mayek";
  src: url("/fonts/noto-sans-meeteimayek-subset.woff2") format("woff2");
  unicode-range: U+ABC0-ABFF, U+AAE0-AAFF;
  font-display: swap;
}

/* Dwarpal Labs design system (linkguard/docs/design-system.md): one brand colour, one ink, three
   status colours; system fonts with Noto first; same type scale as the app (sp → px). */
:root {
  --brand: #1e3a8a;
  --on-brand: #ffffff;
  --brand-tint: #eef2ff;
  --ink: #111827;
  --ink-muted: #4b5563;
  --outline: #6b7280;
  --outline-soft: #e5e7eb;
  --bg: #ffffff;
  --surface: #f3f4f6;
  --safe: #15803d;
  --caution: #b45309;
  --danger: #b91c1c;

  --font: "Noto Sans", system-ui, -apple-system, "Segoe UI", Roboto,
    "Noto Sans Devanagari", "Noto Sans Tamil", "LG Ol Chiki", "LG Meetei Mayek", sans-serif;
  --text-hero: 2.5rem;
  --text-display: 1.75rem;
  --text-title: 1.5rem;
  --text-heading: 1.25rem;
  --text-body-lg: 1.125rem;
  --text-body: 1rem;
  --text-label: 1.125rem;
  --text-caption: 0.875rem;

  --space-sm: 8px;
  --space-md: 12px;
  --space-lg: 16px;
  --space-xl: 24px;
  --space-xxl: 32px;
  --space-xxxl: 48px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --touch-min: 56px;
  --measure: 720px;
}
@media (prefers-color-scheme: dark) {
  :root {
    --brand: #a5b4fc;
    --on-brand: #0b1220;
    --brand-tint: #2b3450;
    --ink: #f3f4f6;
    --ink-muted: #9ca3af;
    --outline-soft: #1f2a40;
    --bg: #0b1220;
    --surface: #141c2f;
    --safe: #4ade80;
    --caution: #fbbf24;
    --danger: #f87171;
  }
}

* { box-sizing: border-box; }
html { font-size: 100%; -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font);
  font-size: var(--text-body-lg);
  line-height: 1.55;
  letter-spacing: 0;
}
main {
  max-width: var(--measure);
  margin: 0 auto;
  padding: var(--space-xxl) var(--space-lg) var(--space-xxxl);
}
@media (min-width: 600px) {
  main { padding: var(--space-xxxl) var(--space-xl) 96px; }
}

/* Header: the LinkGuard shield and the parent wordmark. */
header { margin-bottom: var(--space-xxxl); }
.mark {
  display: inline-flex;
  align-items: center;
  gap: var(--space-md);
  min-height: 48px;
  color: var(--ink);
  font-size: var(--text-heading);
  font-weight: 600;
  text-decoration: none;
}
.mark img { width: 32px; height: 32px; border-radius: 8px; }

h1 {
  font-size: 2rem;
  line-height: 1.25;
  font-weight: 600;
  margin: 0 0 var(--space-lg);
}
@media (min-width: 600px) {
  h1 { font-size: var(--text-hero); }
}
h2 {
  font-size: var(--text-title);
  line-height: 1.4;
  font-weight: 600;
  margin: var(--space-xxxl) 0 var(--space-md);
}
h3 {
  font-size: var(--text-heading);
  line-height: 1.5;
  font-weight: 600;
  margin: 0 0 4px;
}
h4 {
  font-size: var(--text-body-lg);
  line-height: 1.5;
  font-weight: 600;
  margin: 0 0 2px;
}
p, li { margin: 0 0 var(--space-lg); }
.lede { font-size: var(--text-body-lg); color: var(--ink-muted); }
.muted { color: var(--ink-muted); font-size: var(--text-body); }
ul { padding-left: var(--space-xl); }
li { margin-bottom: var(--space-md); }
code {
  font-family: ui-monospace, "SFMono-Regular", Menlo, Consolas, monospace;
  font-size: 0.95em;
  background: var(--surface);
  border-radius: 6px;
  padding: 1px 6px;
}

/* Links are underlined, never colour-only. */
a { color: var(--brand); text-decoration: underline; text-underline-offset: 3px; }
a:focus-visible, .button:focus-visible {
  outline: 3px solid var(--brand);
  outline-offset: 2px;
  border-radius: 4px;
}

/* Product card. */
.card {
  background: var(--surface);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
  margin-top: var(--space-xxxl);
}
.card h2 { margin-top: 0; }
.tagline { font-size: var(--text-title); font-weight: 600; line-height: 1.4; margin-bottom: var(--space-md); }

/* Buttons: same three variants and sizes as the app (§7.1). Labels wrap instead of shrinking. */
.actions { display: flex; flex-direction: column; gap: var(--space-md); margin: var(--space-xl) 0 var(--space-sm); }
@media (min-width: 600px) {
  .actions { flex-direction: row; flex-wrap: wrap; }
}
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: var(--touch-min);
  padding: 14px var(--space-xl);
  border-radius: var(--radius-md);
  font-size: var(--text-label);
  font-weight: 600;
  line-height: 1.4;
  text-align: center;
  text-decoration: none;
}
.button.primary { background: var(--brand); color: var(--on-brand); }
.button.secondary { border: 1.5px solid var(--outline); color: var(--ink); }
.actions + .muted { margin-top: 0; }

/* How it works: icon + short title + one sentence. */
.steps { list-style: none; padding: 0; margin: var(--space-xl) 0 0; }
.steps li { display: flex; gap: var(--space-lg); margin-bottom: var(--space-xl); }
.steps svg { flex: none; width: 32px; height: 32px; margin-top: 2px; color: var(--brand); }
.steps p { margin: 0; color: var(--ink-muted); }

/* Your language: each name in its own script; tall line height so Indic vowel signs never clip. */
.langs {
  list-style: none;
  padding: 0;
  margin: var(--space-md) 0 var(--space-lg);
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(10rem, 1fr));
  gap: var(--space-sm) var(--space-lg);
  line-height: 1.7;
}
.langs .muted { font-size: var(--text-caption); }

footer {
  margin-top: var(--space-xxxl);
  padding-top: var(--space-lg);
  border-top: 1px solid var(--outline-soft);
  color: var(--ink-muted);
  font-size: var(--text-caption);
}