/* DC316 site stylesheet — plain CSS, no frameworks, no build step.
   Edit colors/fonts here and every page picks them up. */
:root {
  --bg: #0d1117;
  --panel: #161b22;
  --border: #30363d;
  --text: #e6edf3;
  --muted: #8b949e;
  --accent: #3fb950;
  --accent-dim: #238636;
  --link: #58a6ff;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  line-height: 1.6;
}
a { color: var(--link); }
header {
  border-bottom: 1px solid var(--border);
  padding: 1.5rem 1rem 1rem;
  text-align: center;
}
header h1 { margin: 0; font-size: 2rem; letter-spacing: 0.02em; }
header h1 span { color: var(--accent); }
header p { color: var(--muted); margin: 0.25rem 0 0; }
nav {
  display: flex;
  gap: 1.25rem;
  justify-content: center;
  flex-wrap: wrap;
  padding: 0.75rem 1rem;
  border-bottom: 1px solid var(--border);
  background: var(--panel);
}
nav a { text-decoration: none; font-weight: 600; }
nav a:hover { text-decoration: underline; }
main { max-width: 760px; margin: 0 auto; padding: 1.5rem 1rem 3rem; }
.card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 1.25rem;
  margin-bottom: 1.25rem;
}
.card h2, .card h3 { margin-top: 0; }
.btn {
  display: inline-block;
  background: var(--accent-dim);
  color: #fff;
  font-weight: 700;
  text-decoration: none;
  padding: 0.6rem 1.25rem;
  border-radius: 6px;
}
.btn:hover { background: var(--accent); }
.muted { color: var(--muted); }
footer {
  border-top: 1px solid var(--border);
  text-align: center;
  color: var(--muted);
  font-size: 0.9rem;
  padding: 1.5rem 1rem;
}