*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
:root { --primary: #3B82F6; --primary-dark: #2563EB; --bg: #0a0a0a; --card-bg: #111113; --border: #1e1e22; --text: #f5f5f5; --muted: #888; --success: #22c55e; --warning: #f59e0b; --danger: #ef4444; }
body { font-family: 'Inter', sans-serif; background: var(--bg); color: var(--text); min-height: 100vh; }

/* Layout */
.layout { display: grid; grid-template-columns: 240px 1fr; min-height: 100vh; }
.sidebar { background: #070709; border-right: 1px solid var(--border); display: flex; flex-direction: column; position: fixed; top: 0; bottom: 0; width: 240px; z-index: 50; }
.sidebar-header { padding: 20px 18px; border-bottom: 1px solid var(--border); }
.sidebar-header h1 { font-size: 16px; font-weight: 900; } .sidebar-header h1 span { color: var(--primary); }
.sidebar-header p { font-size: 11px; color: var(--muted); margin-top: 2px; }
.sidebar-nav { flex: 1; overflow-y: auto; padding: 12px 8px; }
.sidebar-nav a { display: flex; align-items: center; gap: 10px; padding: 9px 14px; border-radius: 8px; color: var(--muted); text-decoration: none; font-size: 13px; font-weight: 500; transition: all 0.15s; margin-bottom: 2px; }
.sidebar-nav a:hover { background: rgba(59,130,246,0.06); color: var(--text); }
.sidebar-nav a.active { background: rgba(59,130,246,0.1); color: var(--primary); font-weight: 600; }
.sidebar-nav .nav-icon { font-size: 16px; width: 20px; text-align: center; }
.sidebar-footer { padding: 14px 18px; border-top: 1px solid var(--border); }
.sidebar-footer .user-email { font-size: 11px; color: var(--muted); margin-bottom: 4px; overflow: hidden; text-overflow: ellipsis; }
.sidebar-footer .user-role { font-size: 10px; color: var(--primary); font-weight: 600; text-transform: uppercase; }
.btn-signout { margin-top: 8px; padding: 6px 12px; background: none; border: 1px solid var(--border); border-radius: 6px; color: var(--muted); font-size: 11px; cursor: pointer; width: 100%; }
.btn-signout:hover { border-color: var(--danger); color: var(--danger); }

/* Main */
.main { margin-left: 240px; }
.main-header { padding: 16px 28px; border-bottom: 1px solid var(--border); display: flex; justify-content: space-between; align-items: center; position: sticky; top: 0; background: var(--bg); z-index: 40; }
.main-header h2 { font-size: 16px; font-weight: 700; }
.main-content { padding: 24px 28px; }

/* Cards */
.card { background: var(--card-bg); border: 1px solid var(--border); border-radius: 12px; margin-bottom: 16px; }
.card-header { padding: 14px 18px; border-bottom: 1px solid var(--border); display: flex; justify-content: space-between; align-items: center; }
.card-title { font-size: 14px; font-weight: 700; }

/* Stats */
.stats-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 12px; margin-bottom: 20px; }
.stat-card { background: var(--card-bg); border: 1px solid var(--border); border-radius: 12px; padding: 18px; text-align: center; }
.stat-value { font-size: 28px; font-weight: 900; }
.stat-label { font-size: 11px; color: var(--muted); margin-top: 2px; text-transform: uppercase; letter-spacing: 0.3px; }
.stat-primary .stat-value { color: var(--primary); }
.stat-success .stat-value { color: var(--success); }
.stat-warning .stat-value { color: var(--warning); }
.stat-danger .stat-value { color: var(--danger); }

/* Buttons */
.btn { padding: 8px 16px; border-radius: 8px; font-size: 13px; font-weight: 600; cursor: pointer; border: none; transition: all 0.15s; display: inline-flex; align-items: center; gap: 6px; }
.btn-primary { background: var(--primary); color: #fff; } .btn-primary:hover { background: var(--primary-dark); }
.btn-success { background: var(--success); color: #fff; }
.btn-danger { background: var(--danger); color: #fff; }
.btn-outline { background: none; border: 1px solid var(--border); color: var(--text); } .btn-outline:hover { border-color: var(--primary); color: var(--primary); }
.btn-sm { padding: 6px 12px; font-size: 12px; }

/* Forms */
.form-label { font-size: 11px; font-weight: 600; text-transform: uppercase; color: var(--muted); display: block; margin-bottom: 4px; letter-spacing: 0.3px; }
.form-input { width: 100%; padding: 10px 14px; background: var(--bg); border: 1px solid var(--border); border-radius: 8px; color: var(--text); font-size: 13px; font-family: inherit; transition: border-color 0.2s; }
.form-input:focus { outline: none; border-color: var(--primary); }
.form-input::placeholder { color: #555; }
select.form-input { appearance: none; }

/* Tables */
.table-wrapper { overflow-x: auto; }
.data-table { width: 100%; border-collapse: collapse; font-size: 13px; }
.data-table th { padding: 10px 14px; text-align: left; font-size: 11px; text-transform: uppercase; color: var(--muted); letter-spacing: 0.3px; border-bottom: 1px solid var(--border); }
.data-table td { padding: 10px 14px; border-bottom: 1px solid var(--border); }
.data-table tr:hover { background: rgba(59,130,246,0.02); }

/* Empty state */
.empty-state { padding: 48px 24px; text-align: center; }
.empty-state .empty-icon { font-size: 36px; margin-bottom: 12px; }
.empty-state h3 { font-size: 15px; font-weight: 700; margin-bottom: 6px; }
.empty-state p { font-size: 13px; color: var(--muted); }

/* Toast */
.toast { position: fixed; bottom: 24px; right: 24px; padding: 12px 20px; background: #1a1a2e; border: 1px solid var(--border); border-radius: 10px; font-size: 13px; z-index: 9999; animation: slideUp 0.3s ease; box-shadow: 0 8px 24px rgba(0,0,0,0.4); }
@keyframes slideUp { from { transform: translateY(20px); opacity: 0; } to { transform: translateY(0); opacity: 1; } }

/* Mobile */
.mobile-toggle { display: none; background: none; border: none; color: var(--text); font-size: 20px; cursor: pointer; }
.overlay { display: none; position: fixed; inset: 0; background: rgba(0,0,0,0.6); z-index: 45; }
@media (max-width: 768px) {
  .layout { grid-template-columns: 1fr; }
  .sidebar { transform: translateX(-100%); transition: transform 0.3s; }
  .sidebar.open { transform: translateX(0); }
  .overlay.show { display: block; }
  .main { margin-left: 0; }
  .mobile-toggle { display: block; }
  .main-content { padding: 16px; }
  .stats-grid { grid-template-columns: 1fr 1fr; }
}