:root {
  color-scheme: dark;
  --bg: #0d1117;
  --surface: #151b23;
  --surface-2: #1b232d;
  --text: #f4f7fb;
  --muted: #a7b0bc;
  --border: rgba(255,255,255,.10);
  --accent: #8bb8ff;
  --danger: #ff6b6b;
  --max: 820px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  min-height: 100vh;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont,
               "Segoe UI", sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.65;
}

a { color: var(--accent); }

.site-header {
  border-bottom: 1px solid var(--border);
  background: rgba(13,17,23,.92);
}

.nav {
  max-width: var(--max);
  margin: 0 auto;
  padding: 18px 22px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}

.brand {
  color: var(--text);
  text-decoration: none;
  font-weight: 750;
  letter-spacing: .02em;
}

.nav-links {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

.nav-links a {
  color: var(--muted);
  text-decoration: none;
  font-size: .92rem;
}

main {
  max-width: var(--max);
  margin: 0 auto;
  padding: 52px 22px 72px;
}

.hero {
  padding: 34px;
  border: 1px solid var(--border);
  border-radius: 22px;
  background: linear-gradient(145deg, var(--surface), var(--surface-2));
  margin-bottom: 34px;
}

h1 {
  margin: 0 0 10px;
  font-size: clamp(2rem, 6vw, 3.25rem);
  line-height: 1.1;
}

h2 {
  margin-top: 42px;
  margin-bottom: 12px;
  font-size: 1.25rem;
}

h3 {
  margin-top: 26px;
  margin-bottom: 8px;
  font-size: 1rem;
}

p, li { color: #d5dbe3; }

.muted { color: var(--muted); }

.card {
  padding: 22px;
  border: 1px solid var(--border);
  border-radius: 16px;
  background: var(--surface);
  margin: 18px 0;
}

.danger-card {
  border-color: rgba(255,107,107,.35);
  background: rgba(255,107,107,.06);
}

.button {
  display: inline-block;
  margin-top: 12px;
  padding: 12px 18px;
  border-radius: 10px;
  background: var(--text);
  color: var(--bg);
  text-decoration: none;
  font-weight: 700;
}

.button-danger {
  background: var(--danger);
  color: #160b0b;
}

ul, ol { padding-left: 24px; }

footer {
  max-width: var(--max);
  margin: 0 auto;
  padding: 26px 22px 44px;
  border-top: 1px solid var(--border);
  color: var(--muted);
  font-size: .9rem;
}

@media (max-width: 620px) {
  .nav {
    align-items: flex-start;
    flex-direction: column;
  }

  .hero { padding: 24px; }

  main { padding-top: 32px; }
}