:root {
  --bg: #f7f8fb;
  --surface: #ffffff;
  --text: #1a1f36;
  --muted: #6b7280;
  --primary: #3b82f6;
  --primary-hover: #2563eb;
  --border: #e5e7eb;
  --shadow: 0 1px 3px rgba(0, 0, 0, 0.06), 0 1px 2px rgba(0, 0, 0, 0.04);
  --shadow-hover: 0 4px 12px rgba(0, 0, 0, 0.08);
  --radius: 12px;
  --gap: 16px;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC",
               "Helvetica Neue", Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
}

.container {
  max-width: 1080px;
  margin: 0 auto;
  padding: 0 24px;
}

.site-header {
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  padding: 24px 0;
  margin-bottom: 32px;
}

.site-header .brand {
  font-size: 24px;
  font-weight: 700;
  color: var(--primary);
}

.site-header .tagline {
  margin: 4px 0 0;
  color: var(--muted);
  font-size: 14px;
}

main { padding-bottom: 48px; }

section { margin-bottom: 40px; }

h2 {
  font-size: 20px;
  font-weight: 600;
  margin: 0 0 16px;
}

.grid {
  display: grid;
  gap: var(--gap);
}

.featured-grid {
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}

.others-grid {
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
}

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  box-shadow: var(--shadow);
  transition: box-shadow 0.2s, transform 0.2s;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.card:hover {
  box-shadow: var(--shadow-hover);
  transform: translateY(-2px);
}

.card-name {
  font-size: 18px;
  font-weight: 600;
  margin: 0;
}

.card-tagline {
  font-size: 13px;
  color: var(--muted);
  margin: 0;
  flex-grow: 1;
}

.card-code {
  margin: 0;
  font-size: 0.85em;
  color: var(--muted);
  font-family: ui-monospace, SFMono-Regular, monospace;
}

.card-actions {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.btn {
  display: inline-block;
  padding: 8px 16px;
  border-radius: 8px;
  border: 1px solid transparent;
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  text-decoration: none;
  text-align: center;
  transition: background 0.2s;
}

.btn-primary {
  background: var(--primary);
  color: #fff;
}

.btn-primary:hover { background: var(--primary-hover); }

.btn-secondary {
  background: transparent;
  color: var(--primary);
  border-color: var(--primary);
}

.btn-secondary:hover {
  background: rgba(59, 130, 246, 0.08);
}

.btn-access {
  background: transparent;
  color: var(--text);
  border-color: var(--border);
}

.btn-access:hover {
  background: var(--bg);
}

#stale-banner {
  background: #fef3c7;
  border: 1px solid #fbbf24;
  border-radius: var(--radius);
  padding: 12px 16px;
  margin-bottom: 24px;
  font-size: 14px;
  color: #92400e;
}

.error {
  background: #fef2f2;
  border: 1px solid #fecaca;
  border-radius: var(--radius);
  padding: 24px;
  text-align: center;
}

.error h2 { color: #b91c1c; margin-bottom: 8px; }
.error p { color: var(--muted); margin: 0 0 16px; }

.site-footer {
  border-top: 1px solid var(--border);
  padding: 20px 0;
  text-align: center;
  color: var(--muted);
  font-size: 13px;
}