/* ===================================================================
   FREED SLOTS STYLES
   Dashboard for viewing and analyzing freed timetable slots
   =================================================================== */

/* ===================================================================
   1. LAYOUT & CONTAINER
   =================================================================== */

.freed-slots-container {
  padding: var(--spacing-lg);
  background: linear-gradient(135deg, #f3f4f6, #eef2ff);
  min-height: 100vh;
}

/* ===================================================================
   2. HEADER SECTION
   =================================================================== */

.freed-slots-header {
  text-align: center;
  margin-bottom: var(--spacing-xl);
}

.freed-slots-header h1 {
  color: var(--primary-color);
  font-size: 2rem;
  font-weight: 700;
  margin-bottom: var(--spacing-md);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
}

.freed-slots-header h1 i {
  font-size: 1.8rem;
  animation: rotateIcon 3s linear infinite;
}

@keyframes rotateIcon {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

/* ===================================================================
   3. INSTRUCTIONS SECTION
   =================================================================== */

.instructions-alert {
  background: linear-gradient(135deg, #d1ecf1, #bee5eb);
  border-left: 4px solid var(--info-color);
  border-radius: var(--border-radius);
  padding: var(--spacing-lg);
  margin-bottom: var(--spacing-xl);
  box-shadow: var(--shadow-sm);
}

.instructions-alert ul {
  margin: 0;
  padding-left: var(--spacing-lg);
  list-style-type: disc;
}

.instructions-alert li {
  margin-bottom: var(--spacing-xs);
  line-height: 1.6;
}

.instructions-alert strong {
  color: var(--primary-color);
  font-weight: 600;
}

/* ===================================================================
   4. MATRIX LAYOUT (SIDEBAR + CONTENT)
   =================================================================== */

.matrix-container {
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: var(--spacing-xl);
  align-items: start;
}

/* ===================================================================
   5. FILTER SIDEBAR
   =================================================================== */

.filter-sidebar {
  background: white;
  border-radius: 12px;
  box-shadow: var(--shadow-md);
  padding: var(--spacing-xl);
  position: sticky;
  top: 100px;
  transition: all 0.3s ease;
}

.filter-sidebar:hover {
  box-shadow: 0 0 20px rgba(13, 110, 253, 0.25);
  transform: translateY(-2px);
}

.filter-sidebar h5 {
  font-weight: 600;
  color: var(--primary-color);
  margin-bottom: var(--spacing-lg);
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  font-size: 1.2rem;
}

.filter-sidebar h5 i {
  font-size: 1.1rem;
}

.filter-form .form-label {
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: var(--spacing-xs);
  font-size: 0.9rem;
}

.filter-form .form-select {
  border: 2px solid var(--border-color);
  border-radius: var(--border-radius);
  transition: all 0.3s ease;
  font-size: 0.95rem;
}

.filter-form .form-select:focus {
  border-color: var(--primary-color);
  box-shadow: 0 0 0 0.2rem rgba(13, 110, 253, 0.25);
  outline: none;
}

.filter-apply-btn {
  background: linear-gradient(135deg, var(--primary-color), #007bff);
  color: white;
  padding: var(--spacing-sm) var(--spacing-md);
  font-weight: 600;
  border: none;
  border-radius: var(--border-radius);
  cursor: pointer;
  transition: all 0.3s ease;
  width: 100%;
  margin-bottom: var(--spacing-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-xs);
}

.filter-apply-btn i {
  font-size: 1rem;
}

.filter-apply-btn:hover {
  background: linear-gradient(135deg, #007bff, var(--primary-color));
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.filter-apply-btn:active {
  transform: translateY(0);
}

.filter-reset-btn {
  background: white;
  color: var(--text-secondary);
  padding: var(--spacing-sm) var(--spacing-md);
  font-weight: 600;
  border: 2px solid var(--border-color);
  border-radius: var(--border-radius);
  cursor: pointer;
  transition: all 0.3s ease;
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-xs);
}

.filter-reset-btn:hover {
  background-color: #f8f9fa;
  border-color: var(--text-secondary);
}

/* ===================================================================
   6. DATA SECTION
   =================================================================== */

.data-section {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xl);
}

/* Card styling */
.freed-slots-card {
  border: none;
  border-radius: 15px;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.05);
  background: white;
  overflow: hidden;
  transition: all 0.3s ease;
}

.freed-slots-card:hover {
  box-shadow: 0 6px 30px rgba(0, 0, 0, 0.1);
}

.freed-slots-card-header {
  background: linear-gradient(90deg, var(--primary-color), #007bff);
  color: white;
  font-weight: 600;
  letter-spacing: 0.5px;
  padding: var(--spacing-md) var(--spacing-lg);
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 1.1rem;
}

.page-badge {
  background: white;
  color: var(--primary-color);
  padding: 4px 12px;
  border-radius: 20px;
  font-size: 0.85rem;
  font-weight: 600;
}

.freed-slots-card-body {
  padding: var(--spacing-xl);
}

/* ===================================================================
   7. TABLE STYLING
   =================================================================== */

.freed-slots-table-wrapper {
  overflow-x: auto;
  margin-bottom: var(--spacing-lg);
  border-radius: var(--border-radius);
  box-shadow: var(--shadow-sm);
}

.freed-slots-table {
  width: 100%;
  margin-bottom: 0;
  font-size: 0.9rem;
  background: white;
}

.freed-slots-table caption {
  color: var(--text-muted);
  font-size: 0.85rem;
  padding: var(--spacing-sm);
  caption-side: top;
}

.freed-slots-table thead {
  background: linear-gradient(135deg, #e3f2fd, #bbdefb);
}

.freed-slots-table thead th {
  padding: var(--spacing-md);
  font-weight: 600;
  color: var(--text-primary);
  text-align: left;
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  border-bottom: 2px solid var(--primary-color);
  white-space: nowrap;
}

.freed-slots-table tbody td {
  padding: var(--spacing-md);
  vertical-align: middle;
  border-bottom: 1px solid var(--border-color);
}

.freed-slots-table tbody tr {
  transition: background-color 0.2s ease;
}

.freed-slots-table tbody tr:hover {
  background-color: rgba(13, 110, 253, 0.05);
}

.freed-slots-table tbody tr:nth-child(even) {
  background-color: #f8f9fa;
}

/* Empty state */
.empty-row {
  text-align: center;
  padding: var(--spacing-xxl) !important;
  color: var(--text-muted);
  font-style: italic;
}

/* ===================================================================
   8. PAGINATION
   =================================================================== */

.pagination-wrapper {
  display: flex;
  justify-content: center;
  margin-top: var(--spacing-lg);
}

.pagination {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-xs);
  list-style: none;
  padding: 0;
  margin: 0;
}

.page-item {
  margin: 0;
}

.page-link {
  padding: var(--spacing-sm) var(--spacing-md);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  color: var(--primary-color);
  text-decoration: none;
  transition: all 0.3s ease;
  font-weight: 500;
  display: block;
}

.page-link:hover {
  background-color: var(--primary-color);
  color: white;
  border-color: var(--primary-color);
}

.page-item.active .page-link {
  background-color: var(--primary-color);
  border-color: var(--primary-color);
  color: white;
}

.page-item.disabled .page-link {
  color: var(--text-muted);
  pointer-events: none;
  background-color: #f8f9fa;
}

/* ===================================================================
   9. CHARTS SECTION
   =================================================================== */

.charts-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--spacing-xl);
  margin-top: var(--spacing-xl);
}

.chart-card {
  background: white;
  border-radius: 12px;
  padding: var(--spacing-lg);
  box-shadow: var(--shadow-md);
  transition: all 0.3s ease;
}

.chart-card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-3px);
}

.chart-card h6 {
  color: var(--text-primary);
  font-weight: 600;
  margin-bottom: var(--spacing-md);
  font-size: 1rem;
  text-align: center;
}

.chart-canvas {
  width: 100%;
  height: 250px;
}

/* ===================================================================
   10. RESPONSIVE DESIGN
   =================================================================== */

/* Tablets and below (992px) */
@media (max-width: 992px) {
  .matrix-container {
    grid-template-columns: 1fr;
    gap: var(--spacing-lg);
  }

  .filter-sidebar {
    position: relative;
    top: auto;
    margin-bottom: var(--spacing-lg);
  }

  .freed-slots-container {
    padding: var(--spacing-md);
  }

  .freed-slots-header h1 {
    font-size: 1.75rem;
  }

  .freed-slots-table {
    font-size: 0.85rem;
  }

  .freed-slots-table thead th,
  .freed-slots-table tbody td {
    padding: var(--spacing-sm);
  }

  .charts-row {
    grid-template-columns: 1fr;
  }
}

/* Mobile devices (768px) */
@media (max-width: 768px) {
  .freed-slots-header h1 {
    font-size: 1.5rem;
    flex-direction: column;
  }

  .freed-slots-card-header {
    flex-direction: column;
    gap: var(--spacing-sm);
    text-align: center;
  }

  .freed-slots-table {
    font-size: 0.8rem;
  }

  /* Stack table on mobile */
  .freed-slots-table thead {
    display: none;
  }

  .freed-slots-table tbody tr {
    display: block;
    margin-bottom: var(--spacing-lg);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-sm);
  }

  .freed-slots-table tbody td {
    display: block;
    text-align: right;
    padding: var(--spacing-sm) var(--spacing-md);
    border-bottom: 1px solid var(--border-color);
    position: relative;
    padding-left: 50%;
  }

  .freed-slots-table tbody td:last-child {
    border-bottom: none;
  }

  .freed-slots-table tbody td::before {
    content: attr(data-label);
    position: absolute;
    left: var(--spacing-md);
    width: 45%;
    text-align: left;
    font-weight: 700;
    color: var(--primary-color);
    text-transform: uppercase;
    font-size: 0.75rem;
  }

  .pagination {
    justify-content: center;
  }

  .page-link {
    padding: var(--spacing-xs) var(--spacing-sm);
    font-size: 0.85rem;
  }
}

/* Small mobile devices (480px) */
@media (max-width: 480px) {
  .freed-slots-container {
    padding: var(--spacing-sm);
  }

  .freed-slots-header h1 {
    font-size: 1.3rem;
  }

  .filter-sidebar {
    padding: var(--spacing-md);
  }

  .freed-slots-card-body {
    padding: var(--spacing-md);
  }

  .instructions-alert {
    padding: var(--spacing-md);
  }

  .instructions-alert ul {
    padding-left: var(--spacing-md);
  }
}

/* ===================================================================
   11. PRINT STYLES
   =================================================================== */

@media print {
  .filter-sidebar,
  .freed-slots-header,
  .instructions-alert,
  .pagination-wrapper,
  .charts-row {
    display: none !important;
  }

  .freed-slots-container {
    padding: 0;
    background: white;
  }

  .matrix-container {
    grid-template-columns: 1fr;
  }

  .freed-slots-table {
    font-size: 0.75rem;
  }

  .freed-slots-table thead {
    background: #333 !important;
    color: white !important;
  }

  .freed-slots-table tbody tr {
    page-break-inside: avoid;
  }

  .freed-slots-card {
    box-shadow: none;
  }
}

/* ===================================================================
   12. DARK MODE SUPPORT (OPTIONAL)
   =================================================================== */

@media (prefers-color-scheme: dark) {
  .freed-slots-container {
    background: linear-gradient(135deg, #1a1a1a, #111);
    color: #e9ecef;
  }

  .filter-sidebar,
  .freed-slots-card,
  .chart-card {
    background: #1f1f1f;
    color: #e9ecef;
  }

  .freed-slots-table thead th {
    background-color: #333;
    color: #e9ecef;
  }

  .freed-slots-table tbody tr:nth-child(even) {
    background-color: #2a2a2a;
  }

  .freed-slots-table tbody tr:hover {
    background-color: rgba(13, 110, 253, 0.15);
  }

  .instructions-alert {
    background: linear-gradient(135deg, #1a3a4a, #234a5a);
    color: #e9ecef;
  }
}

/* ===================================================================
   13. ANIMATIONS
   =================================================================== */

@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.freed-slots-card,
.chart-card {
  animation: fadeIn 0.5s ease-out;
}

/* ===================================================================
   14. UTILITY CLASSES
   =================================================================== */

.text-primary-custom {
  color: var(--primary-color);
  font-weight: 600;
}

.badge-custom {
  display: inline-block;
  padding: 4px 10px;
  background-color: var(--primary-color);
  color: white;
  border-radius: 4px;
  font-size: 0.85rem;
  font-weight: 600;
}

.venue-badge {
  display: inline-block;
  padding: 2px 8px;
  background-color: var(--info-color);
  color: white;
  border-radius: 4px;
  font-size: 0.8rem;
  font-weight: 600;
  margin-left: var(--spacing-xs);
}