:root {
  --sidebar-w: 280px;
}
body { background: #f6f7fb; }
.sidebar { width: var(--sidebar-w); min-height: 100vh; display:flex; flex-direction:column; }
.brand-mark{ width:40px; height:40px; border-radius:12px; display:grid; place-items:center; font-weight:800; color:white; background: linear-gradient(135deg,#0ea5e9,#2563eb); }
.nav-link{ border-radius:12px; padding:10px 12px; margin:4px 0; color:#0f172a; display:flex; align-items:center; gap:10px; }
.nav-link:hover{ background:#eef2ff; }
.nav-link.active{ background:#e0e7ff; font-weight:600; }
.nav-section{ margin-top:14px; margin-bottom:6px; padding:0 10px; font-size:12px; text-transform:uppercase; letter-spacing:.08em; color:#64748b; }
.card{ border:0; border-radius:18px; box-shadow: 0 8px 30px rgba(15,23,42,.06); }
.table{ background:#fff; border-radius:16px; overflow:hidden; }
.btn{ border-radius:12px; }
.form-control, .form-select{ border-radius:12px; }
.topbar{ position: sticky; top:0; z-index:10; }
@media (max-width: 992px){ .sidebar{ display:none; } }