:root {
  --bg: #f4f6f9;
  --card: #ffffff;
  --text: #1f2937;
  --muted: #6b7280;
  --border: #e5e7eb;
  --primary: #4f46e5;
  --primary-text: #ffffff;
  --success: #059669;
  --danger: #dc2626;
  --warning: #d97706;
  --sidebar-bg: #ffffff;
  --sidebar-text: #374151;
  --sidebar-active: #eef2ff;
  --shadow: 0 1px 3px rgba(0,0,0,0.08);
}
[data-theme="dark"] {
  --bg: #0f1220;
  --card: #171a2b;
  --text: #e5e7eb;
  --muted: #9ca3af;
  --border: #2a2e45;
  --primary: #6366f1;
  --primary-text: #ffffff;
  --success: #34d399;
  --danger: #f87171;
  --warning: #fbbf24;
  --sidebar-bg: #12142280;
  --sidebar-text: #d1d5db;
  --sidebar-active: #262b47;
  --shadow: 0 1px 3px rgba(0,0,0,0.4);
}
* { box-sizing: border-box; }
body { margin: 0; font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif; background: var(--bg); color: var(--text); }
a { color: var(--primary); }
.login-body { display: flex; align-items: center; justify-content: center; height: 100vh; }
.login-card { background: var(--card); border-radius: 14px; box-shadow: var(--shadow); padding: 32px; width: 320px; }
.login-card h1 { margin: 0 0 20px; font-size: 1.4rem; text-align: center; }
.form-row { margin-bottom: 14px; display: flex; flex-direction: column; gap: 4px; }
.form-row label { font-size: 0.8rem; color: var(--muted); font-weight: 600; }
input, select, textarea { padding: 8px 10px; border: 1px solid var(--border); border-radius: 8px; background: var(--card); color: var(--text); font-size: 0.9rem; width: 100%; }
.btn { display: inline-block; padding: 9px 16px; border-radius: 8px; border: none; background: var(--primary); color: var(--primary-text); font-weight: 600; cursor: pointer; font-size: 0.9rem; text-decoration: none; }
.btn.secondary { background: var(--border); color: var(--text); }
.error { color: var(--danger); font-size: 0.85rem; }
.success { color: var(--success); font-size: 0.85rem; }

.app-shell { display: flex; min-height: 100vh; }
.sidebar { width: 230px; background: var(--sidebar-bg); border-right: 1px solid var(--border); padding: 16px 0; flex-shrink: 0; }
.sidebar .brand { padding: 0 18px 16px; font-weight: 700; font-size: 1.1rem; }
.sidebar a { display: block; padding: 9px 18px; color: var(--sidebar-text); text-decoration: none; font-size: 0.88rem; }
.sidebar a:hover, .sidebar a.active { background: var(--sidebar-active); }
.main { flex: 1; min-width: 0; }
.topbar { display: flex; align-items: center; justify-content: space-between; padding: 12px 20px; background: var(--card); border-bottom: 1px solid var(--border); }
.topbar .actions { display: flex; align-items: center; gap: 12px; }
.theme-toggle { cursor: pointer; border: 1px solid var(--border); background: var(--card); color: var(--text); border-radius: 8px; padding: 6px 10px; font-size: 0.85rem; }
.content { padding: 20px; }

.grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 14px; margin-bottom: 20px; }
.stat, .card { background: var(--card); border: 1px solid var(--border); border-radius: 12px; padding: 16px; box-shadow: var(--shadow); }
.stat .value { font-size: 1.4rem; font-weight: 700; margin-top: 4px; }
.stat .label { color: var(--muted); font-size: 0.82rem; display: flex; align-items: center; gap: 6px; }

table { width: 100%; border-collapse: collapse; font-size: 0.88rem; }
th, td { text-align: left; padding: 8px 10px; border-bottom: 1px solid var(--border); }
th { color: var(--muted); font-size: 0.75rem; text-transform: uppercase; letter-spacing: 0.03em; }
.badge { display: inline-block; padding: 2px 8px; border-radius: 999px; font-size: 0.75rem; font-weight: 600; }
.badge.active { background: #dcfce7; color: #166534; }
.badge.inactive { background: #fee2e2; color: #991b1b; }
[data-theme="dark"] .badge.active { background: #064e3b; color: #6ee7b7; }
[data-theme="dark"] .badge.inactive { background: #7f1d1d; color: #fca5a5; }
.toolbar { display: flex; gap: 10px; align-items: end; flex-wrap: wrap; margin-bottom: 16px; }