:root {
  --bg: #0f1419;
  --card: #1a2332;
  --text: #e8edf4;
  --muted: #8b9cb3;
  --accent: #3d8bfd;
  --border: #2a3544;
  --err: #f87171;
}
* { box-sizing: border-box; }
body { margin: 0; font-family: system-ui, -apple-system, Segoe UI, sans-serif; background: var(--bg); color: var(--text); }
.nav { display: flex; justify-content: space-between; align-items: center; padding: 12px 20px; background: var(--card); border-bottom: 1px solid var(--border); }
.nav .brand { font-weight: 700; }
.nav .links a { color: var(--text); margin-right: 16px; text-decoration: none; }
.nav .user { color: var(--muted); margin-left: 16px; }
.main { padding: 24px; max-width: 1100px; margin: 0 auto; }
h1 { margin-top: 0; }
.muted { color: var(--muted); }
.err { color: var(--err); }
.big { font-size: 2rem; font-weight: 700; margin: 0; }
.cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 16px; margin: 16px 0; }
.card { background: var(--card); border: 1px solid var(--border); border-radius: 8px; padding: 16px; margin-bottom: 16px; }
.card label { display: block; margin-bottom: 10px; }
.card input, .card select, .card textarea { width: 100%; padding: 8px; border-radius: 6px; border: 1px solid var(--border); background: var(--bg); color: var(--text); }
.card button { margin-top: 8px; padding: 8px 16px; background: var(--accent); color: #fff; border: none; border-radius: 6px; cursor: pointer; }
.tbl { width: 100%; border-collapse: collapse; margin-top: 12px; }
.tbl th, .tbl td { border-bottom: 1px solid var(--border); padding: 10px 8px; text-align: left; }
.tbl th { color: var(--muted); font-size: 0.85rem; }
.login-page { display: flex; align-items: center; justify-content: center; min-height: 100vh; }
.login-form { background: var(--card); padding: 32px; border-radius: 12px; width: 320px; border: 1px solid var(--border); }
.login-form h1 { margin-bottom: 20px; }
.login-form label { display: block; margin-bottom: 12px; }
.login-form input { width: 100%; padding: 8px; margin-top: 4px; border-radius: 6px; border: 1px solid var(--border); background: var(--bg); color: var(--text); }
.login-form button { width: 100%; padding: 10px; background: var(--accent); color: #fff; border: none; border-radius: 6px; cursor: pointer; }
code { font-size: 0.85rem; color: var(--muted); }