:root {
  color-scheme: light dark;
  --bg: #ffffff;
  --surface: #f3f2ff;
  --surface-warning: #fff8e8;
  --text: #1d1d1f;
  --text-dim: #6e6e73;
  --border: #e5e5ea;
  --accent: #5856d6;
  --warning: #c77700;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #000000;
    --surface: #201f39;
    --surface-warning: #352b19;
    --text: #f5f5f7;
    --text-dim: #a1a1a6;
    --border: #38383a;
    --accent: #7d7aff;
    --warning: #ffb340;
  }
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  max-width: 760px;
  margin: 0 auto;
  padding: 32px 20px 72px;
  font: 16px/1.72 -apple-system, BlinkMacSystemFont, "SF Pro Text", "PingFang SC", "Helvetica Neue", Arial, sans-serif;
  color: var(--text);
  background: var(--bg);
  -webkit-text-size-adjust: 100%;
}

h1 {
  margin: 4px 0 6px;
  font-size: clamp(30px, 7vw, 42px);
  line-height: 1.2;
  letter-spacing: -0.025em;
}

h2 {
  margin: 38px 0 10px;
  font-size: 21px;
  line-height: 1.35;
  letter-spacing: -0.012em;
}

h3 {
  margin: 26px 0 8px;
  font-size: 17px;
  line-height: 1.4;
}

p, li { color: var(--text); }
ul, ol { padding-left: 24px; }
li { margin: 7px 0; }

a {
  color: var(--accent);
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}

a:hover { text-decoration-thickness: 2px; }
a:focus-visible { outline: 3px solid var(--accent); outline-offset: 3px; border-radius: 4px; }

.eyebrow {
  margin: 0;
  color: var(--accent);
  font-weight: 700;
  letter-spacing: 0.02em;
}

.meta {
  margin: 0 0 28px;
  color: var(--text-dim);
  font-size: 14px;
}

.nav {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 28px 0;
}

.nav a {
  padding: 7px 14px;
  border: 1px solid var(--border);
  border-radius: 999px;
  color: var(--text-dim);
  background: var(--surface);
  font-size: 14px;
  text-decoration: none;
}

.nav a:hover { border-color: var(--accent); color: var(--accent); }

.callout {
  margin: 24px 0;
  padding: 15px 17px;
  border-left: 4px solid var(--accent);
  border-radius: 10px;
  background: var(--surface);
}

.callout.warning {
  border-left-color: var(--warning);
  background: var(--surface-warning);
}

.callout p { margin: 0; }
.callout p + p { margin-top: 12px; }

hr {
  margin: 56px 0;
  border: 0;
  border-top: 1px solid var(--border);
}

footer {
  margin-top: 56px;
  color: var(--text-dim);
  font-size: 14px;
}

.language-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 16px;
  margin-top: 28px;
}

.language-card {
  display: grid;
  gap: 6px;
  min-height: 132px;
  padding: 24px;
  border: 1px solid var(--border);
  border-radius: 18px;
  background: var(--surface);
  text-decoration: none;
}

.language-card strong { font-size: 24px; }
.language-card span { color: var(--text-dim); }
.language-card:hover { border-color: var(--accent); }

@media (max-width: 480px) {
  body { padding-top: 24px; }
  .nav { gap: 8px; }
  .nav a { padding: 6px 12px; }
}

@media print {
  .nav { display: none; }
  body { max-width: none; color: #000; background: #fff; }
  a { color: #000; }
}