:root {
  color-scheme: light dark;
  --accent: #1685a0;
  --background: #f5f8f8;
  --surface: #ffffff;
  --text: #10252d;
  --secondary: #5f7178;
  --border: #dbe6e8;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--background);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.65;
}

main {
  width: min(760px, calc(100% - 32px));
  margin: 0 auto;
  padding: 64px 0 80px;
}

.brand {
  color: var(--accent);
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
}

h1 { margin: 12px 0 8px; font-size: clamp(2rem, 7vw, 3.6rem); line-height: 1.12; }
h2 { margin-top: 36px; font-size: 1.25rem; }
h3 { margin-top: 28px; font-size: 1rem; }
p, li { color: var(--secondary); }
a { color: var(--accent); }

.card {
  margin-top: 32px;
  padding: 24px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 22px;
}

.links { display: grid; gap: 12px; margin-top: 28px; }
.links a {
  display: block;
  padding: 16px 18px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 14px;
  font-weight: 600;
  text-decoration: none;
}

.language { margin-top: 56px; padding-top: 36px; border-top: 1px solid var(--border); }
.meta { font-size: 0.9rem; }

@media (prefers-color-scheme: dark) {
  :root {
    --accent: #68c9dc;
    --background: #071b27;
    --surface: #102a38;
    --text: #eefafa;
    --secondary: #b6c8cd;
    --border: #244553;
  }
}