/**
 * Admin Panel Shared Styles
 * F20: Admin UI Expansion
 */

/* Reset & Base */
* { box-sizing: border-box; }

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Arial, sans-serif;
  margin: 0;
  padding: 20px;
  background: #f5f5f5;
  color: #333;
  line-height: 1.5;
}

/* Layout */
.container {
  max-width: 1400px;
  margin: 0 auto;
}

/* Header */
h1 {
  color: #2c3e50;
  margin-bottom: 20px;
  border-bottom: 3px solid #3498db;
  padding-bottom: 10px;
  display: flex;
  align-items: center;
  gap: 10px;
}

h1 .subtitle {
  font-size: 14px;
  font-weight: normal;
  color: #7f8c8d;
}

/* Navigation */
.nav-bar {
  background: white;
  padding: 15px 20px;
  border-radius: 8px;
  margin-bottom: 20px;
  box-shadow: 0 2px 4px rgba(0,0,0,0.1);
  display: flex;
  gap: 20px;
  flex-wrap: wrap;
}

.nav-bar a {
  color: #3498db;
  text-decoration: none;
  font-weight: 600;
  padding: 8px 16px;
  border-radius: 4px;
  transition: background 0.2s;
}

.nav-bar a:hover {
  background: #ecf0f1;
}

.nav-bar a.active {
  background: #3498db;
  color: white;
}

/* Cards */
.card {
  background: white;
  padding: 20px;
  border-radius: 8px;
  box-shadow: 0 2px 4px rgba(0,0,0,0.1);
  margin-bottom: 20px;
}

.card h2 {
  margin-top: 0;
  margin-bottom: 15px;
  color: #2c3e50;
  font-size: 18px;
}

/* Stats Grid */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 20px;
  margin-bottom: 20px;
}

.stat-card {
  background: white;
  padding: 20px;
  border-radius: 8px;
  box-shadow: 0 2px 4px rgba(0,0,0,0.1);
  text-align: center;
}

.stat-card .stat-value {
  font-size: 36px;
  font-weight: 700;
  color: #2c3e50;
}

.stat-card .stat-label {
  font-size: 14px;
  color: #7f8c8d;
  margin-top: 5px;
}

.stat-card.highlight {
  background: linear-gradient(135deg, #3498db, #2980b9);
  color: white;
}

.stat-card.highlight .stat-value,
.stat-card.highlight .stat-label {
  color: white;
}

/* Filters */
.filters {
  background: white;
  padding: 20px;
  border-radius: 8px;
  margin-bottom: 20px;
  box-shadow: 0 2px 4px rgba(0,0,0,0.1);
  display: flex;
  flex-wrap: wrap;
  gap: 15px;
  align-items: center;
}

.filters label {
  font-weight: 600;
  color: #34495e;
}

.filters input,
.filters select {
  padding: 8px 12px;
  border: 1px solid #ddd;
  border-radius: 4px;
  font-size: 14px;
}

.filters input:focus,
.filters select:focus {
  outline: none;
  border-color: #3498db;
}

/* Buttons */
button, .btn {
  padding: 8px 16px;
  border: none;
  border-radius: 4px;
  cursor: pointer;
  font-weight: 600;
  font-size: 14px;
  transition: background 0.2s, transform 0.1s;
}

button:active, .btn:active {
  transform: scale(0.98);
}

.btn-primary {
  background: #3498db;
  color: white;
}

.btn-primary:hover {
  background: #2980b9;
}

.btn-success {
  background: #27ae60;
  color: white;
}

.btn-success:hover {
  background: #229954;
}

.btn-danger {
  background: #e74c3c;
  color: white;
}

.btn-danger:hover {
  background: #c0392b;
}

.btn-secondary {
  background: #95a5a6;
  color: white;
}

.btn-secondary:hover {
  background: #7f8c8d;
}

.btn-sm {
  padding: 4px 8px;
  font-size: 12px;
}

/* Tables */
.data-table {
  width: 100%;
  border-collapse: collapse;
  background: white;
  border-radius: 8px;
  overflow: hidden;
  box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.data-table th {
  background: #34495e;
  color: white;
  padding: 12px 15px;
  text-align: left;
  font-weight: 600;
}

.data-table td {
  padding: 12px 15px;
  border-bottom: 1px solid #ecf0f1;
}

.data-table tr:hover {
  background: #f8f9fa;
}

.data-table tr:last-child td {
  border-bottom: none;
}

/* Status Badges */
.badge {
  display: inline-block;
  padding: 4px 10px;
  border-radius: 12px;
  font-size: 12px;
  font-weight: 600;
}

.badge-success {
  background: #d4edda;
  color: #155724;
}

.badge-warning {
  background: #fff3cd;
  color: #856404;
}

.badge-danger {
  background: #f8d7da;
  color: #721c24;
}

.badge-info {
  background: #d1ecf1;
  color: #0c5460;
}

.badge-secondary {
  background: #e2e3e5;
  color: #383d41;
}

/* Loading State */
.loading {
  text-align: center;
  padding: 40px;
  color: #7f8c8d;
}

.spinner {
  display: inline-block;
  width: 20px;
  height: 20px;
  border: 2px solid #ddd;
  border-top-color: #3498db;
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
  margin-right: 10px;
}

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

/* Error State */
.error {
  background: #f8d7da;
  color: #721c24;
  padding: 15px;
  border-radius: 4px;
  margin: 20px 0;
}

/* Empty State */
.empty {
  text-align: center;
  padding: 40px;
  color: #7f8c8d;
  font-style: italic;
}

/* Toast Notifications */
.toast {
  position: fixed;
  bottom: 20px;
  right: 20px;
  padding: 15px 25px;
  border-radius: 8px;
  color: white;
  font-weight: 600;
  box-shadow: 0 4px 12px rgba(0,0,0,0.2);
  transform: translateY(100px);
  opacity: 0;
  transition: transform 0.3s, opacity 0.3s;
  z-index: 1000;
}

.toast.show {
  transform: translateY(0);
  opacity: 1;
}

.toast-success {
  background: #27ae60;
}

.toast-error {
  background: #e74c3c;
}

.toast-info {
  background: #3498db;
}

.toast-warning {
  background: #f39c12;
}

/* Pagination */
.pagination {
  display: flex;
  gap: 5px;
  justify-content: center;
  margin-top: 20px;
}

.page-btn {
  padding: 8px 12px;
  border: 1px solid #ddd;
  background: white;
  cursor: pointer;
  border-radius: 4px;
}

.page-btn:hover:not(:disabled) {
  background: #ecf0f1;
}

.page-btn.active {
  background: #3498db;
  color: white;
  border-color: #3498db;
}

.page-btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

/* Form Groups */
.form-group {
  margin-bottom: 15px;
}

.form-group label {
  display: block;
  margin-bottom: 5px;
  font-weight: 600;
  color: #34495e;
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 10px;
  border: 1px solid #ddd;
  border-radius: 4px;
  font-size: 14px;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: #3498db;
}

/* Utility Classes */
.text-muted { color: #7f8c8d; }
.text-success { color: #27ae60; }
.text-danger { color: #e74c3c; }
.text-warning { color: #f39c12; }
.text-info { color: #3498db; }

.mb-0 { margin-bottom: 0; }
.mb-1 { margin-bottom: 10px; }
.mb-2 { margin-bottom: 20px; }

.d-flex { display: flex; }
.justify-between { justify-content: space-between; }
.align-center { align-items: center; }
.gap-1 { gap: 10px; }
.gap-2 { gap: 20px; }

/* Modal */
.modal {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.6);
  display: flex;
  justify-content: center;
  align-items: center;
  z-index: 2000;
}

.modal-content {
  background: white;
  padding: 30px;
  border-radius: 12px;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
  max-width: 400px;
  width: 90%;
}

.modal-content h2 {
  margin-top: 0;
  margin-bottom: 20px;
  text-align: center;
  color: #2c3e50;
}

/* Responsive */
@media (max-width: 768px) {
  body { padding: 10px; }

  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .nav-bar {
    flex-direction: column;
    gap: 10px;
  }

  .filters {
    flex-direction: column;
    align-items: stretch;
  }

  .data-table {
    font-size: 14px;
  }

  .data-table th,
  .data-table td {
    padding: 8px 10px;
  }
}