:root {
  --bg: #0f1117;
  --surface: #1a1d27;
  --border: #2a2d3a;
  --text: #e1e4ed;
  --text-muted: #8b8fa3;
  --accent: #6366f1;
  --accent-hover: #818cf8;
  --link: #818cf8;
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  min-height: 100vh;
}

nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 2rem;
  border-bottom: 1px solid var(--border);
  background: var(--surface);
}

.logo {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--text);
  text-decoration: none;
}

.nav-links { display: flex; gap: 1.5rem; }
.nav-links a {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.9rem;
  transition: color 0.2s;
}
.nav-links a:hover { color: var(--accent-hover); }

main {
  max-width: 900px;
  margin: 2rem auto;
  padding: 0 2rem;
}

h1 { font-size: 1.8rem; margin-bottom: 0.5rem; }
h2 { font-size: 1.3rem; margin: 2rem 0 0.75rem; color: var(--accent-hover); }
h3 { font-size: 1.1rem; margin: 1.5rem 0 0.5rem; }

p { margin-bottom: 1rem; color: var(--text-muted); }

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

ul, ol { margin: 0.5rem 0 1rem 1.5rem; }
li { margin-bottom: 0.4rem; color: var(--text-muted); }

.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1rem;
  margin: 1.5rem 0;
}

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 1.25rem;
  transition: border-color 0.2s;
}
.card:hover { border-color: var(--accent); }
.card h3 { margin: 0 0 0.5rem; font-size: 1rem; }
.card p { font-size: 0.85rem; margin-bottom: 0.75rem; }
.card a { font-size: 0.85rem; }

.tag {
  display: inline-block;
  background: var(--border);
  color: var(--text-muted);
  padding: 0.15rem 0.5rem;
  border-radius: 4px;
  font-size: 0.75rem;
  margin-right: 0.3rem;
}

.status-done { color: #4ade80; }
.status-progress { color: #facc15; }
.status-todo { color: var(--text-muted); }

footer {
  text-align: center;
  padding: 2rem;
  color: var(--text-muted);
  font-size: 0.8rem;
  border-top: 1px solid var(--border);
  margin-top: 3rem;
}