:root {
  --primary: #7c3aed;
  --primary-dark: #5b21b6;
  --primary-light: #ede9fe;
  --surface: #ffffff;
  --bg: #f5f3ff;
  --border: #e5e7eb;
  --text: #1a1a2e;
  --text-muted: #6b7280;
  --success: #16a34a;
  --danger: #dc2626;
  --warning: #d97706;
  --radius: 12px;
}
* { margin: 0; padding: 0; box-sizing: border-box; }
body { font-family: 'Inter', system-ui, sans-serif; background: var(--bg); color: var(--text); }
.app { display: flex; min-height: 100vh; }
.sidebar { width: 240px; flex-shrink: 0; background: #1a1a2e; position: fixed; top: 0; left: 0; height: 100vh; display: flex; flex-direction: column; z-index: 100; overflow-y: auto; }
.content { padding: 28px; flex: 1; min-width: 0; margin-left: 240px; }
.sidebar-logo { padding: 20px 16px; border-bottom: 1px solid rgba(255,255,255,0.1); display: flex; align-items: center; gap: 10px; }
.logo-mark { font-size: 1rem; font-weight: 800; color: white; }
.logo-sub { font-size: 0.7rem; color: #6b7280; }
.sidebar-nav { flex: 1; padding: 12px 0; }
.nav-section { padding: 8px 16px 4px; font-size: 0.65rem; font-weight: 700; color: #4b5563; letter-spacing: 1px; text-transform: uppercase; }
.nav-link { display: flex; align-items: center; gap: 10px; padding: 10px 16px; color: #9ca3af; text-decoration: none; font-size: 0.875rem; font-weight: 500; transition: all 0.15s; border-left: 3px solid transparent; }
.nav-link:hover { background: rgba(255,255,255,0.05); color: white; }
.nav-link.active { background: rgba(124,58,237,0.15); color: white; border-left-color: var(--primary); font-weight: 600; }
.sidebar-footer { padding: 16px; border-top: 1px solid rgba(255,255,255,0.1); }
.topbar { display: flex; align-items: center; justify-content: space-between; margin-bottom: 24px; padding-bottom: 20px; border-bottom: 1px solid var(--border); }
.topbar-title { font-size: 1.4rem; font-weight: 800; color: var(--text); }
.topbar-actions { display: flex; gap: 10px; align-items: center; }
.card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 20px; }
.stats-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px,1fr)); gap: 16px; margin-bottom: 24px; }
.stat-card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 20px; }
.stat-value { font-size: 1.8rem; font-weight: 800; color: var(--text); margin-bottom: 4px; }
.stat-label { font-size: 0.75rem; font-weight: 600; color: var(--text-muted); text-transform: uppercase; letter-spacing: 0.5px; }
.stat-icon { width: 40px; height: 40px; border-radius: 10px; display: flex; align-items: center; justify-content: center; margin-bottom: 12px; font-size: 1.2rem; }
.btn { display: inline-flex; align-items: center; gap: 6px; padding: 9px 18px; border: none; border-radius: 8px; cursor: pointer; font-size: 0.875rem; font-weight: 600; transition: all 0.15s; text-decoration: none; }
.btn-primary { background: var(--primary); color: white; }
.btn-primary:hover { background: var(--primary-dark); }
.btn-ghost { background: transparent; color: var(--text-muted); border: 1px solid var(--border); }
.btn-ghost:hover { background: var(--bg); }
.badge { display: inline-block; padding: 2px 10px; border-radius: 20px; font-size: 0.72rem; font-weight: 700; }
.badge-success { background: #dcfce7; color: #14532d; }
.badge-danger { background: #fee2e2; color: #991b1b; }
.badge-warning { background: #fef3c7; color: #78350f; }
.badge-info { background: #dbeafe; color: #1d4ed8; }
.badge-purple { background: #ede9fe; color: #5b21b6; }
.modal-overlay { display: none; position: fixed; inset: 0; background: rgba(0,0,0,0.5); z-index: 1000; align-items: center; justify-content: center; padding: 16px; }
.modal-overlay.open { display: flex; }
.modal { background: var(--surface); border-radius: var(--radius); width: 100%; max-width: 500px; max-height: 90vh; overflow-y: auto; box-shadow: 0 20px 60px rgba(0,0,0,0.3); }
.modal-header { display: flex; align-items: center; justify-content: space-between; padding: 16px 20px; border-bottom: 1px solid var(--border); }
.modal-title { font-size: 1.05rem; font-weight: 700; }
.modal-close { background: none; border: none; font-size: 1.4rem; cursor: pointer; color: var(--text-muted); line-height: 1; }
.modal-body { padding: 20px; }
.modal-footer { padding: 16px 20px; border-top: 1px solid var(--border); display: flex; gap: 10px; justify-content: flex-end; }
.form-group { margin-bottom: 16px; }
.form-label { display: block; font-size: 0.78rem; font-weight: 700; color: var(--text-muted); margin-bottom: 6px; text-transform: uppercase; letter-spacing: 0.5px; }
.form-input { width: 100%; padding: 10px 14px; border: 2px solid var(--border); border-radius: 8px; font-size: 0.9rem; color: var(--text); background: var(--surface); transition: border-color 0.15s; }
.form-input:focus { outline: none; border-color: var(--primary); }
.form-select { width: 100%; padding: 10px 14px; border: 2px solid var(--border); border-radius: 8px; font-size: 0.9rem; color: var(--text); background: var(--surface); cursor: pointer; }
.table-wrap { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; font-size: 0.875rem; }
th { text-align: left; padding: 10px 12px; font-size: 0.72rem; font-weight: 700; color: var(--text-muted); text-transform: uppercase; letter-spacing: 0.5px; border-bottom: 2px solid var(--border); background: #fafafa; }
td { padding: 12px; border-bottom: 1px solid var(--border); color: var(--text); vertical-align: middle; }
tr:last-child td { border-bottom: none; }
tr:hover td { background: var(--bg); }
#toast-container { position: fixed; bottom: 20px; right: 20px; z-index: 9999; display: flex; flex-direction: column; gap: 8px; }
.toast { padding: 12px 18px; border-radius: 10px; font-size: 0.875rem; font-weight: 600; color: white; box-shadow: 0 4px 12px rgba(0,0,0,0.2); animation: slideIn 0.3s ease; min-width: 240px; }
.toast.success { background: var(--success); }
.toast.error { background: var(--danger); }
.toast.info { background: var(--primary); }
@keyframes slideIn { from { transform: translateX(100%); opacity: 0; } to { transform: translateX(0); opacity: 1; } }
.flex { display: flex; }
.flex-1 { flex: 1; }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }
.gap-2 { gap: 8px; }
.gap-3 { gap: 12px; }
.mb-2 { margin-bottom: 8px; }
.mb-3 { margin-bottom: 12px; }
.mb-4 { margin-bottom: 16px; }
.text-center { text-align: center; }
.text-muted { color: var(--text-muted); }
.text-sm { font-size: 0.85rem; }
.font-bold { font-weight: 700; }
.w-full { width: 100%; }
@media (max-width: 768px) {
  .sidebar { transform: translateX(-100%); transition: transform 0.3s; }
  .sidebar.open { transform: translateX(0); }
  .content { margin-left: 0; padding: 16px; }
  .stats-grid { grid-template-columns: 1fr 1fr; }
}