/* ---------- Theme variables ---------- */
:root {
    --bg: #f5f5f5;
    --bg-card: #fff;
    --text: #333;
    --text-muted: #666;
    --heading: #1a1a2e;
    --border: #ddd;
    --border-light: #eee;
    --th-bg: #f9f9f9;
    --shadow: rgba(0,0,0,0.1);
    --input-bg: #fff;
    --navbar-bg: #1a1a2e;
    --footer-link: #666;
}
[data-theme="dark"] {
    --bg: #121212;
    --bg-card: #1e1e1e;
    --text: #e0e0e0;
    --text-muted: #aaa;
    --heading: #90caf9;
    --border: #333;
    --border-light: #2a2a2a;
    --th-bg: #252525;
    --shadow: rgba(0,0,0,0.4);
    --input-bg: #2a2a2a;
    --navbar-bg: #0d0d1a;
    --footer-link: #aaa;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
body { font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif; background: var(--bg); color: var(--text); transition: background 0.2s, color 0.2s; line-height: 1.6; }
.navbar { background: var(--navbar-bg); color: #fff; padding: 1rem 2rem; display: flex; justify-content: space-between; align-items: center; }
.navbar a { color: #fff; text-decoration: none; }
.navbar .brand { font-size: 1.25rem; font-weight: 700; }
.navbar .nav-links { display: flex; align-items: center; }
.navbar .nav-links a { margin-left: 1.5rem; opacity: 0.85; }
.navbar .nav-links a:hover { opacity: 1; }
.container { max-width: 1000px; margin: 2rem auto; padding: 0 1rem; }
.card { background: var(--bg-card); border-radius: 8px; padding: 1.5rem; margin-bottom: 1.5rem; box-shadow: 0 1px 3px var(--shadow); transition: background 0.2s; }
.card h2 { margin-bottom: 1rem; color: var(--heading); }
table { width: 100%; border-collapse: collapse; }
th, td { padding: 0.75rem; text-align: left; border-bottom: 1px solid var(--border-light); }
th { background: var(--th-bg); font-weight: 600; }
.btn { display: inline-block; padding: 0.5rem 1rem; border: none; border-radius: 4px; cursor: pointer; font-size: 0.9rem; text-decoration: none; color: #fff; }
.btn-primary { background: #1a1a2e; }
.btn-success { background: #27ae60; }
.btn-warning { background: #f39c12; }
.btn-danger { background: #e74c3c; }
.btn:hover { opacity: 0.9; }
.form-group { margin-bottom: 1rem; }
.form-group label { display: block; margin-bottom: 0.25rem; font-weight: 500; }
.form-group input, .form-group textarea, .form-group select { width: 100%; padding: 0.5rem; border: 1px solid var(--border); border-radius: 4px; font-size: 0.95rem; background: var(--input-bg); color: var(--text); }
.form-group textarea { resize: vertical; min-height: 80px; }
.alert { padding: 0.75rem 1rem; border-radius: 4px; margin-bottom: 1rem; }
.alert-success { background: #d4edda; color: #155724; }
.alert-error { background: #f8d7da; color: #721c24; }
.badge { display: inline-block; padding: 0.2rem 0.6rem; border-radius: 12px; font-size: 0.8rem; font-weight: 600; }
.badge-draft { background: #ffeaa7; color: #856404; }
.badge-active { background: #d4edda; color: #155724; }
.badge-ended { background: #f8d7da; color: #721c24; }
.stats { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 1rem; margin-bottom: 1.5rem; }
.stat-card { background: var(--bg-card); border-radius: 8px; padding: 1.25rem; text-align: center; box-shadow: 0 1px 3px var(--shadow); transition: background 0.2s; }
.stat-card .number { font-size: 2rem; font-weight: 700; color: var(--heading); }
.stat-card .label { font-size: 0.85rem; color: var(--text-muted); margin-top: 0.25rem; }
.actions { display: flex; gap: 0.5rem; flex-wrap: wrap; }
.text-muted { color: var(--text-muted) !important; }
.text-heading { color: var(--heading) !important; }
a.link-heading { color: var(--heading); }
.theme-toggle { background: none; border: 1px solid rgba(255,255,255,0.3); color: #fff; padding: 0.3rem 0.6rem; border-radius: 4px; cursor: pointer; font-size: 0.85rem; margin-left: 1.5rem; display: flex; align-items: center; gap: 0.3rem; }
.theme-toggle:hover { border-color: rgba(255,255,255,0.6); }