*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background: #0d1117;
  color: #c9d1d9;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 2rem;
}

header { text-align: center; margin-bottom: 3rem; }
header h1 { font-size: 2.5rem; color: #f0f6fc; }
header .tagline { margin-top: 0.5rem; color: #8b949e; font-size: 1rem; }

.links h2 { font-size: 1.2rem; color: #8b949e; margin-bottom: 1rem; text-align: center; }
.links ul { list-style: none; display: flex; flex-direction: column; gap: 0.75rem; }
.links a {
  display: block;
  padding: 0.75rem 1.5rem;
  background: #161b22;
  border: 1px solid #30363d;
  border-radius: 6px;
  color: #58a6ff;
  text-decoration: none;
  transition: border-color 0.2s;
}
.links a:hover { border-color: #58a6ff; }