:root {
  color-scheme: light dark;
  --bg: #f5f7fb;
  --card: rgba(255,255,255,0.82);
  --text: #121722;
  --muted: #5d6678;
  --line: rgba(26, 39, 68, 0.12);
  --accent: #365df6;
  --accent-soft: rgba(54, 93, 246, 0.08);
  --shadow: 0 18px 48px rgba(17, 24, 39, 0.08);
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0f1420;
    --card: rgba(19, 26, 41, 0.88);
    --text: #eef2fb;
    --muted: #b3bdd4;
    --line: rgba(255,255,255,0.12);
    --accent-soft: rgba(113, 144, 255, 0.16);
    --shadow: 0 20px 52px rgba(0,0,0,0.28);
  }
}
* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Inter, system-ui, sans-serif;
  background: linear-gradient(180deg, var(--bg), color-mix(in srgb, var(--bg) 86%, white));
  color: var(--text);
  line-height: 1.68;
}
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
.page {
  max-width: 1080px;
  margin: 0 auto;
  padding: 28px 20px 72px;
}
.topbar {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 18px;
}
.brand { font-size: 1.15rem; font-weight: 750; color: var(--text); }
.nav {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
.nav a {
  padding: 10px 14px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--card);
  box-shadow: var(--shadow);
}
.hero {
  padding: 32px;
  border: 1px solid var(--line);
  border-radius: 28px;
  background: linear-gradient(180deg, color-mix(in srgb, var(--card) 88%, white), var(--card));
  box-shadow: var(--shadow);
  margin-bottom: 22px;
}
.hero h1 {
  margin: 0 0 10px;
  font-size: clamp(2rem, 5vw, 3.25rem);
  line-height: 1.08;
}
.hero p { margin: 0; font-size: 1.05rem; color: var(--muted); }
.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 16px;
}
.card {
  padding: 22px;
  border: 1px solid var(--line);
  border-radius: 24px;
  background: var(--card);
  box-shadow: var(--shadow);
}
.card h2, .card h3 {
  margin: 0 0 10px;
  line-height: 1.22;
}
.card p { margin: 0 0 10px; color: var(--muted); }
.list { margin: 0; padding-inline-start: 1.2rem; }
.list li { margin: 0 0 0.65rem; }
.lang-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(130px, 1fr));
  gap: 10px;
}
.lang-grid a {
  display: block;
  padding: 12px 14px;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: color-mix(in srgb, var(--card) 92%, var(--accent-soft));
}
.footer {
  margin-top: 28px;
  padding: 18px 22px;
  border: 1px solid var(--line);
  border-radius: 20px;
  background: var(--card);
  color: var(--muted);
}
.footer strong { color: var(--text); }
.notice {
  margin-top: 12px;
  padding: 12px 14px;
  border-radius: 14px;
  background: var(--accent-soft);
  border: 1px solid color-mix(in srgb, var(--accent) 28%, transparent);
}
@media (max-width: 640px) {
  .page { padding-inline: 14px; }
  .hero, .card, .footer { padding: 18px; }
}