:root {
  --accent: #0078d7;
  --bg: #f9fafb;
  --text: #111;
  --muted: #555;
  --border: rgba(0, 0, 0, 0.08);
  --radius: 10px;
  --shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0d1117;
    --text: #e6edf3;
    --muted: #9ba3b4;
    --border: rgba(255, 255, 255, 0.08);
    --shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
    --accent: #58a6ff;
  }
}

body {
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: var(--bg);
  color: var(--text);
  margin: 0 auto;
  padding: 2rem 1rem 3rem;
  max-width: 800px;
  line-height: 1.6;
}

header {
  text-align: center;
  margin-bottom: 2.5rem;
}

h1 {
  font-size: 1.9rem;
  margin: 0 0 0.3rem;
}

.subtitle {
  color: var(--muted);
  font-size: 1.05rem;
}

ul {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 0.75rem;
}

li {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  background: rgba(255, 255, 255, 0.6);
  backdrop-filter: blur(8px);
  padding: 0.9rem 1.1rem;
  transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s;
}

@media (prefers-color-scheme: dark) {
  li {
    background: rgba(255, 255, 255, 0.05);
  }
}

li:hover {
  transform: translateY(-3px);
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.15);
  background: rgba(255, 255, 255, 0.9);
}

a {
  text-decoration: none;
  color: var(--accent);
  font-weight: 500;
  font-size: 1.05rem;
}

footer {
  text-align: center;
  color: var(--muted);
  font-size: 0.9rem;
  margin-top: 3rem;
}

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

footer a:hover {
  text-decoration: underline;
}