:root {
  --bg: #f8fafc;
  --fg: #0f172a;
  --muted: #475569;
  --card: #ffffff;
  --border: #e2e8f0;
  --accent: #2563eb;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0b1220;
    --fg: #e5e7eb;
    --muted: #94a3b8;
    --card: #0f1628;
    --border: #1f2937;
    --accent: #60a5fa;
  }
}

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

body {
  font-family: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, Inter, Arial, sans-serif;
  background: var(--bg);
  color: var(--fg);
  line-height: 1.5;
}

/* Layout */
.wrap {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 16px;
}

header {
  padding: 24px;
  border-bottom: 1px solid var(--border);
}

.hero {
  padding: 32px 0 16px;
}

.grid {
  display: grid;
  gap: 16px;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
}

/* Elements */
nav {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
}

nav a {
  display: inline-block;
  padding: 8px 12px;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: var(--card);
  color: var(--fg);
  text-decoration: none;
  transition: border-color 0.2s ease;
}

nav a:hover {
  border-color: var(--accent);
}

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 16px;
}

.card h3 {
  margin-bottom: 8px;
  font-size: 1.1rem;
}

a.btn {
  display: inline-block;
  margin-top: 8px;
  padding: 8px 10px;
  border-radius: 8px;
  background: var(--accent);
  color: #fff;
  text-decoration: none;
  font-size: 0.95rem;
}

footer {
  padding: 24px;
  text-align: center;
  color: var(--muted);
}

/* Utility */
.muted {
  color: var(--muted);
  font-size: 0.95rem;
}

.site-title {
  text-decoration: none;
  color: var(--fg);
}

.site-title:hover {
  color: var(--accent);
}