:root {
  --bg: #f8fafc;
  --surface: #ffffff;
  --text: #0f172a;
  --muted: #475569;
  --accent: #2563eb;
  --border: #e2e8f0;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
}
.container { max-width: 980px; margin: 0 auto; padding: 0 20px; }
header {
  background: var(--surface);
  border-bottom: 1px solid var(--border);
}
.nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  min-height: 64px;
  gap: 16px;
  flex-wrap: wrap;
}
.brand { font-weight: 700; font-size: 1.15rem; color: var(--accent); text-decoration: none; }
.menu { display: flex; gap: 18px; flex-wrap: wrap; }
.menu a { color: var(--muted); text-decoration: none; font-weight: 500; }
.menu a:hover, .menu a.active { color: var(--accent); }
main { padding: 36px 0 56px; }
.hero {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 28px;
  align-items: center;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 28px;
}
.hero img, .card img { width: 100%; height: auto; border-radius: 12px; display: block; }
.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 20px;
  margin-top: 24px;
}
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 20px;
}
.btn {
  display: inline-block;
  margin-top: 12px;
  padding: 10px 18px;
  background: var(--accent);
  color: #fff;
  text-decoration: none;
  border-radius: 8px;
  font-weight: 500;
}
footer {
  border-top: 1px solid var(--border);
  padding: 20px 0;
  color: var(--muted);
  font-size: 0.9rem;
}
code { background: #e2e8f0; padding: 2px 6px; border-radius: 4px; }