:root {
  --bg: #0f1117;
  --bg-card: #1a1d27;
  --bg-input: #242735;
  --border: #2e3144;
  --text: #e4e4e7;
  --text-muted: #8b8fa3;
  --primary: #6366f1;
  --primary-hover: #818cf8;
  --danger: #ef4444;
  --success: #22c55e;
  --warning: #f59e0b;
  --radius: 8px;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
}

a { color: var(--primary); text-decoration: none; }
a:hover { color: var(--primary-hover); }

/* Layout */
.app { display: flex; min-height: 100vh; }

.sidebar {
  width: 240px;
  background: var(--bg-card);
  border-right: 1px solid var(--border);
  padding: 24px 0;
  position: fixed;
  top: 0;
  left: 0;
  bottom: 0;
  display: flex;
  flex-direction: column;
}

.sidebar-logo {
  padding: 0 24px 24px;
  font-size: 20px;
  font-weight: 700;
  color: var(--primary);
  border-bottom: 1px solid var(--border);
}

.sidebar-nav { flex: 1; padding: 16px 0; }

.sidebar-nav a {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 24px;
  color: var(--text-muted);
  font-size: 14px;
  transition: all 0.15s;
}

.sidebar-nav a:hover,
.sidebar-nav a.active {
  color: var(--text);
  background: rgba(99, 102, 241, 0.1);
  border-right: 2px solid var(--primary);
}

.sidebar-footer {
  padding: 16px 24px;
  border-top: 1px solid var(--border);
}

.main {
  margin-left: 240px;
  flex: 1;
  padding: 32px;
  max-width: 1200px;
}

/* Page header */
.page-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 24px;
}

.page-header h1 {
  font-size: 24px;
  font-weight: 600;
}

/* Cards */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 16px;
  margin-bottom: 24px;
}

.stat-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
}

.stat-card .label {
  font-size: 13px;
  color: var(--text-muted);
  margin-bottom: 4px;
}

.stat-card .value {
  font-size: 32px;
  font-weight: 700;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 16px;
  border: none;
  border-radius: var(--radius);
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.15s;
}

.btn-primary {
  background: var(--primary);
  color: white;
}
.btn-primary:hover { background: var(--primary-hover); }

.btn-danger {
  background: transparent;
  color: var(--danger);
  border: 1px solid var(--danger);
}
.btn-danger:hover { background: var(--danger); color: white; }

.btn-ghost {
  background: transparent;
  color: var(--text-muted);
  border: 1px solid var(--border);
}
.btn-ghost:hover { background: var(--bg-input); color: var(--text); }

.btn-sm { padding: 4px 10px; font-size: 13px; }

/* Forms */
.form-group { margin-bottom: 16px; }

.form-group label {
  display: block;
  font-size: 13px;
  font-weight: 500;
  color: var(--text-muted);
  margin-bottom: 6px;
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 10px 12px;
  background: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text);
  font-size: 14px;
  outline: none;
}

.form-group input:focus,
.form-group select:focus {
  border-color: var(--primary);
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

/* Tables */
table {
  width: 100%;
  border-collapse: collapse;
}

th, td {
  text-align: left;
  padding: 12px 16px;
  border-bottom: 1px solid var(--border);
  font-size: 14px;
}

th {
  font-size: 12px;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

/* Badges */
.badge {
  display: inline-block;
  padding: 2px 8px;
  border-radius: 12px;
  font-size: 12px;
  font-weight: 500;
}

.badge-success { background: rgba(34, 197, 94, 0.15); color: var(--success); }
.badge-warning { background: rgba(245, 158, 11, 0.15); color: var(--warning); }
.badge-danger { background: rgba(239, 68, 68, 0.15); color: var(--danger); }
.badge-info { background: rgba(99, 102, 241, 0.15); color: var(--primary); }

/* Modal */
.modal-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.6);
  z-index: 100;
  align-items: center;
  justify-content: center;
}

.modal-overlay.active { display: flex; }

.modal {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 24px;
  width: 480px;
  max-width: 90vw;
  max-height: 80vh;
  overflow-y: auto;
}

.modal h2 {
  font-size: 18px;
  margin-bottom: 20px;
}

.modal-actions {
  display: flex;
  justify-content: flex-end;
  gap: 8px;
  margin-top: 20px;
}

/* Toast */
.toast {
  position: fixed;
  bottom: 24px;
  right: 24px;
  padding: 12px 20px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-size: 14px;
  z-index: 200;
  animation: slideIn 0.2s ease;
}

.toast.error { border-color: var(--danger); color: var(--danger); }
.toast.success { border-color: var(--success); color: var(--success); }

@keyframes slideIn {
  from { transform: translateY(20px); opacity: 0; }
  to { transform: translateY(0); opacity: 1; }
}

/* Empty state */
.empty {
  text-align: center;
  padding: 48px;
  color: var(--text-muted);
}

.empty p { font-size: 15px; margin-bottom: 16px; }

/* Auth pages */
.auth-container {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
}

.auth-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 40px;
  width: 400px;
}

.auth-card h1 {
  font-size: 24px;
  margin-bottom: 8px;
}

.auth-card .subtitle {
  color: var(--text-muted);
  font-size: 14px;
  margin-bottom: 24px;
}

/* Loading spinner */
.spinner {
  width: 20px;
  height: 20px;
  border: 2px solid var(--border);
  border-top-color: var(--primary);
  border-radius: 50%;
  animation: spin 0.6s linear infinite;
}

@keyframes spin { to { transform: rotate(360deg); } }

/* Data cell */
.data-cell { max-width: 200px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }

/* Responsive */
@media (max-width: 768px) {
  .sidebar { display: none; }
  .main { margin-left: 0; padding: 16px; }
  .form-row { grid-template-columns: 1fr; }
  .stats-grid { grid-template-columns: 1fr 1fr; }
}