:root {
  --primary: #4f46e5;
  --primary-hover: #4338ca;
  --primary-light: #eef2ff;
  --success: #10b981;
  --warning: #f59e0b;
  --danger: #ef4444;
  --gray-50: #f9fafb;
  --gray-100: #f3f4f6;
  --gray-200: #e5e7eb;
  --gray-300: #d1d5db;
  --gray-400: #9ca3af;
  --gray-500: #6b7280;
  --gray-600: #4b5563;
  --gray-700: #374151;
  --gray-800: #1f2937;
  --gray-900: #111827;
  --radius: 8px;
  --shadow: 0 1px 3px rgba(0,0,0,0.1), 0 1px 2px rgba(0,0,0,0.06);
  --shadow-md: 0 4px 6px rgba(0,0,0,0.07), 0 2px 4px rgba(0,0,0,0.06);
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background: var(--gray-50);
  color: var(--gray-800);
  line-height: 1.6;
  min-height: 100vh;
}

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

.container { max-width: 1200px; margin: 0 auto; padding: 0 16px; }

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 8px 16px;
  border: none;
  border-radius: var(--radius);
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s;
  white-space: nowrap;
}
.btn:disabled { opacity: 0.5; cursor: not-allowed; }
.btn-primary { background: var(--primary); color: white; }
.btn-primary:hover:not(:disabled) { background: var(--primary-hover); }
.btn-success { background: var(--success); color: white; }
.btn-danger { background: var(--danger); color: white; }
.btn-danger:hover:not(:disabled) { background: #dc2626; }
.btn-outline { background: white; color: var(--gray-700); border: 1px solid var(--gray-300); }
.btn-outline:hover:not(:disabled) { background: var(--gray-50); }
.btn-sm { padding: 4px 12px; font-size: 13px; }
.btn-lg { padding: 12px 24px; font-size: 16px; }

.card {
  background: white;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 20px;
  margin-bottom: 16px;
}

.form-group { margin-bottom: 16px; }
.form-group label {
  display: block;
  font-size: 14px;
  font-weight: 500;
  color: var(--gray-700);
  margin-bottom: 6px;
}
.form-control {
  width: 100%;
  padding: 10px 12px;
  border: 1px solid var(--gray-300);
  border-radius: var(--radius);
  font-size: 14px;
  transition: border-color 0.2s;
  outline: none;
}
.form-control:focus { border-color: var(--primary); box-shadow: 0 0 0 3px rgba(79,70,229,0.1); }
select.form-control { appearance: auto; }

.navbar {
  background: white;
  border-bottom: 1px solid var(--gray-200);
  padding: 12px 0;
  position: sticky;
  top: 0;
  z-index: 100;
}
.navbar .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.navbar-brand {
  font-size: 18px;
  font-weight: 700;
  color: var(--primary);
}
.navbar-nav { display: flex; gap: 8px; align-items: center; }
.navbar-user { font-size: 14px; color: var(--gray-600); }

.hero {
  text-align: center;
  padding: 80px 20px;
  background: linear-gradient(135deg, var(--primary) 0%, #7c3aed 100%);
  color: white;
}
.hero h1 { font-size: 36px; margin-bottom: 16px; }
.hero p { font-size: 18px; opacity: 0.9; margin-bottom: 32px; }

.role-cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 24px;
  max-width: 800px;
  margin: -40px auto 40px;
  padding: 0 20px;
}
.role-card {
  background: white;
  border-radius: 12px;
  box-shadow: var(--shadow-md);
  padding: 32px 24px;
  text-align: center;
  cursor: pointer;
  transition: transform 0.2s, box-shadow 0.2s;
}
.role-card:hover { transform: translateY(-4px); box-shadow: 0 12px 24px rgba(0,0,0,0.1); }
.role-card .icon { font-size: 48px; margin-bottom: 16px; }
.role-card h3 { font-size: 18px; margin-bottom: 8px; }
.role-card p { font-size: 14px; color: var(--gray-500); }

.login-container {
  max-width: 400px;
  margin: 60px auto;
  padding: 0 20px;
}
.login-card {
  background: white;
  border-radius: 12px;
  box-shadow: var(--shadow-md);
  padding: 32px;
}
.login-card h2 { text-align: center; margin-bottom: 24px; }
.login-card .form-group:last-of-type { margin-bottom: 24px; }

.tabs {
  display: flex;
  border-bottom: 2px solid var(--gray-200);
  margin-bottom: 20px;
  overflow-x: auto;
  scrollbar-width: none;
  -ms-overflow-style: none;
}
.tabs::-webkit-scrollbar { display: none; }
.tab {
  padding: 10px 16px;
  font-size: 14px;
  font-weight: 500;
  color: var(--gray-500);
  cursor: pointer;
  border-bottom: 2px solid transparent;
  margin-bottom: -2px;
  white-space: nowrap;
  transition: all 0.2s;
}
.tab:hover { color: var(--gray-700); }
.tab.active { color: var(--primary); border-bottom-color: var(--primary); }

.table-container { overflow-x: auto; }
table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
}
th, td {
  padding: 10px 12px;
  text-align: left;
  border-bottom: 1px solid var(--gray-200);
}
th { font-weight: 600; color: var(--gray-600); background: var(--gray-50); }
tr:hover td { background: var(--gray-50); }

.pagination {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  margin-top: 16px;
}
.pagination .page-info { font-size: 14px; color: var(--gray-500); }

.media-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 12px;
}
.media-item {
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--gray-100);
  position: relative;
}
.media-item img, .media-item video {
  width: 100%;
  height: 200px;
  object-fit: cover;
  display: block;
}
.media-item .caption {
  padding: 8px;
  font-size: 13px;
  color: var(--gray-600);
}

.date-nav {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 20px;
}
.date-nav h3 { min-width: 120px; text-align: center; }

.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.5);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
}
.modal {
  background: white;
  border-radius: 12px;
  box-shadow: 0 20px 60px rgba(0,0,0,0.2);
  width: 90%;
  max-width: 500px;
  max-height: 80vh;
  overflow-y: auto;
}
.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 20px;
  border-bottom: 1px solid var(--gray-200);
}
.modal-header h3 { font-size: 16px; }
.modal-close {
  background: none;
  border: none;
  font-size: 20px;
  cursor: pointer;
  color: var(--gray-400);
  padding: 4px;
}
.modal-body { padding: 20px; }
.modal-footer {
  display: flex;
  justify-content: flex-end;
  gap: 8px;
  padding: 16px 20px;
  border-top: 1px solid var(--gray-200);
}

.toast {
  position: fixed;
  top: 20px;
  right: 20px;
  padding: 12px 20px;
  border-radius: var(--radius);
  color: white;
  font-size: 14px;
  z-index: 2000;
  transform: translateX(120%);
  transition: transform 0.3s;
}
.toast.show { transform: translateX(0); }
.toast-info { background: var(--primary); }
.toast-success { background: var(--success); }
.toast-warning { background: var(--warning); }
.toast-error { background: var(--danger); }

.loading, .empty-state, .error-state {
  text-align: center;
  padding: 40px 20px;
  color: var(--gray-500);
}
.spinner {
  width: 32px;
  height: 32px;
  border: 3px solid var(--gray-200);
  border-top-color: var(--primary);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
  margin: 0 auto 12px;
}
@keyframes spin { to { transform: rotate(360deg); } }

.badge {
  display: inline-block;
  padding: 2px 8px;
  border-radius: 12px;
  font-size: 12px;
  font-weight: 500;
}
.badge-active { background: #d1fae5; color: #065f46; }
.badge-disabled { background: #fee2e2; color: #991b1b; }

.stat-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 16px;
  margin-bottom: 20px;
}
.stat-card {
  background: white;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 20px;
  text-align: center;
}
.stat-card .stat-value { font-size: 28px; font-weight: 700; color: var(--primary); }
.stat-card .stat-label { font-size: 13px; color: var(--gray-500); margin-top: 4px; }

.upload-zone {
  border: 2px dashed var(--gray-300);
  border-radius: var(--radius);
  padding: 32px;
  text-align: center;
  cursor: pointer;
  transition: border-color 0.2s;
  outline: none;
}
.upload-zone:hover, .upload-zone:focus { border-color: var(--primary); }
.upload-zone .icon { font-size: 36px; margin-bottom: 8px; }

.flex { display: flex; }
.flex-between { display: flex; justify-content: space-between; align-items: center; }
.gap-2 { gap: 8px; }
.gap-4 { gap: 16px; }
.mt-2 { margin-top: 8px; }
.mt-4 { margin-top: 16px; }
.mb-2 { margin-bottom: 8px; }
.mb-4 { margin-bottom: 16px; }
.text-sm { font-size: 14px; }
.text-gray { color: var(--gray-500); }
.text-center { text-align: center; }

@media (max-width: 640px) {
  .hero h1 { font-size: 24px; }
  .hero p { font-size: 14px; }
  .role-cards { grid-template-columns: 1fr; }
  .stat-grid { grid-template-columns: repeat(2, 1fr); }
  .media-grid { grid-template-columns: repeat(2, 1fr); }
  .tabs { gap: 0; }
  .tab { padding: 8px 10px; font-size: 13px; }
}