:root {
  --bg: #fafafa;
  --fg: #1a1a1a;
  --muted: #666;
  --accent: #2563eb;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #111;
    --fg: #eee;
    --muted: #999;
    --accent: #60a5fa;
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  background: var(--bg);
  color: var(--fg);
  line-height: 1.6;
}

.container {
  max-width: 960px;
  margin: 0 auto;
  padding: 0 1rem;
}

nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1.5rem 0;
}

nav ul {
  display: flex;
  gap: 1.5rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

.logo { font-weight: 700; font-size: 1.25rem; color: var(--fg); }

.hero { padding: 6rem 0 4rem; }
.hero h1 { font-size: clamp(2rem, 6vw, 3.5rem); margin: 0 0 1rem; }
.hero p { color: var(--muted); font-size: 1.125rem; }

section { padding: 2rem 0; }

footer {
  padding: 3rem 1rem;
  color: var(--muted);
  font-size: 0.875rem;
}