:root {
  --bg: #0f172a;
  --panel: #111827;
  --card: #ffffff;
  --muted: #64748b;
  --line: #e2e8f0;
  --accent: #0f766e;
  --accent-hover: #0d9488;
  --danger: #b91c1c;
  --warn: #b45309;
  --ok: #15803d;
}
* { box-sizing: border-box; }
html, body { margin: 0; min-height: 100%; font-family: "Segoe UI", system-ui, sans-serif; background: #f1f5f9; color: #0f172a; }
.shell { display: grid; grid-template-columns: 240px 1fr; min-height: 100vh; }
.sidebar { background: var(--bg); color: #e2e8f0; padding: 28px 20px; display: flex; flex-direction: column; gap: 8px; }
.brand { font-size: 22px; font-weight: 700; letter-spacing: .02em; }
.brand-sub { color: #94a3b8; margin-bottom: 24px; }
.sidebar nav { display: flex; flex-direction: column; gap: 6px; }
.sidebar a { color: #cbd5e1; text-decoration: none; padding: 10px 12px; border-radius: 8px; }
.sidebar a:hover, .sidebar a.active { background: #1e293b; color: #fff; }
.logout-form { margin-top: auto; }
.logout-form button, .btn, button.btn {
  border: 0; border-radius: 8px; padding: 9px 14px; cursor: pointer; font-weight: 600;
  background: var(--accent); color: #fff;
}
.logout-form button { width: 100%; background: #1e293b; }
.btn:hover { background: var(--accent-hover); }
.btn.secondary { background: #334155; }
.btn.danger { background: var(--danger); }
.btn.ghost { background: #e2e8f0; color: #0f172a; }
.content { padding: 32px; }
h1 { margin: 0 0 8px; font-size: 28px; }
.sub { color: var(--muted); margin-bottom: 24px; }
.card { background: var(--card); border-radius: 16px; padding: 20px; box-shadow: 0 8px 24px rgba(15, 23, 42, .06); }
table { width: 100%; border-collapse: collapse; font-size: 14px; }
th, td { text-align: left; padding: 12px 10px; border-bottom: 1px solid var(--line); vertical-align: top; }
th { color: var(--muted); font-weight: 600; font-size: 12px; text-transform: uppercase; letter-spacing: .04em; }
.badge { display: inline-block; border-radius: 999px; padding: 3px 10px; font-size: 12px; font-weight: 700; }
.badge.ok { background: #dcfce7; color: var(--ok); }
.badge.err { background: #fee2e2; color: var(--danger); }
.badge.warn { background: #ffedd5; color: var(--warn); }
.mono { font-family: Consolas, monospace; font-size: 12px; word-break: break-all; }
.row-actions { display: flex; flex-wrap: wrap; gap: 6px; }
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; max-width: 760px; }
.form-grid label, .stack label { display: block; font-size: 13px; font-weight: 600; margin-bottom: 6px; }
.form-grid input, .stack input, .stack select, .form-grid select {
  width: 100%; padding: 10px 12px; border: 1px solid var(--line); border-radius: 8px; font-size: 14px;
}
.full { grid-column: 1 / -1; }
.alert { padding: 12px 14px; border-radius: 10px; margin-bottom: 16px; font-weight: 600; }
.alert.ok { background: #dcfce7; color: var(--ok); }
.alert.err { background: #fee2e2; color: var(--danger); }
.login-wrap { min-height: 100vh; display: grid; place-items: center; background: linear-gradient(160deg, #0f172a, #134e4a); }
.login-card { width: min(420px, 92vw); background: #fff; border-radius: 18px; padding: 32px; }
.login-card h1 { font-size: 24px; }
.topbar { display: flex; justify-content: space-between; align-items: flex-start; gap: 16px; margin-bottom: 20px; }
@media (max-width: 900px) {
  .shell { grid-template-columns: 1fr; }
  .sidebar { flex-direction: row; flex-wrap: wrap; align-items: center; }
  .form-grid { grid-template-columns: 1fr; }
}