/**
 * GET ENGINEERING SEAT — Public Colleges Directory & Detail Styles (v1.0)
 *
 * Adheres strictly to the Phase 05.1 design system:
 * - CSS variables (--color-*, --spacing-*, --radius-*, --shadow-*)
 * - Responsive layout (<640px, 640-1023px, >=1024px)
 * - Light and dark mode support
 * - High-contrast accessible typography
 */

/* ==========================================================================
   1. Directory Header & Filters Bar
   ========================================================================== */
.colleges-header {
  padding: var(--spacing-8) 0 var(--spacing-6);
  background-color: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
}

.colleges-header-inner {
  max-width: 900px;
}

.colleges-title {
  font-size: clamp(var(--font-size-2xl), 3.5vw, var(--font-size-3xl));
  font-weight: var(--font-weight-bold);
  color: var(--color-text);
  margin-bottom: var(--spacing-2);
  letter-spacing: -0.02em;
}

.colleges-subtitle {
  font-size: var(--font-size-base);
  color: var(--color-text-secondary);
  line-height: var(--line-height-relaxed);
  margin-bottom: 0;
}

/* Filter Bar Container */
.colleges-filter-section {
  padding: var(--spacing-6) 0;
  background-color: var(--color-surface-raised, #f8fafc);
  border-bottom: 1px solid var(--color-border);
}

[data-theme="dark"] .colleges-filter-section {
  background-color: rgba(15, 23, 42, 0.4);
}

.colleges-filter-bar {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-4);
}

.filter-controls-row {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr auto;
  gap: var(--spacing-3);
  align-items: center;
}

@media (max-width: 1023.98px) {
  .filter-controls-row {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 639.98px) {
  .filter-controls-row {
    grid-template-columns: 1fr;
  }
}

.filter-input-wrapper {
  position: relative;
  display: flex;
  align-items: center;
}

.filter-search-icon {
  position: absolute;
  left: var(--spacing-3);
  font-size: 16px;
  color: var(--color-text-muted);
  pointer-events: none;
}

.filter-search-input {
  padding-left: 38px !important;
  height: 42px;
  font-size: var(--font-size-sm) !important;
  width: 100%;
}

.filter-select {
  height: 42px;
  font-size: var(--font-size-sm);
  padding: var(--spacing-2) var(--spacing-3);
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
  background-color: var(--color-surface);
  color: var(--color-text);
  width: 100%;
}

.filter-select:focus,
.filter-search-input:focus {
  border-color: var(--color-secondary);
  outline: none;
}

/* Active Filter Pills */
.active-filters-row {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--spacing-2);
  min-height: 28px;
}

.active-filter-label {
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-semibold);
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.filter-pill {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-1);
  padding: 2px 8px;
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-full);
  font-size: var(--font-size-xs);
  color: var(--color-text);
}

.filter-pill-remove {
  background: none;
  border: none;
  cursor: pointer;
  padding: 0 2px;
  font-size: 14px;
  line-height: 1;
  color: var(--color-text-muted);
}

.filter-pill-remove:hover {
  color: var(--color-danger, #ef4444);
}

/* ==========================================================================
   2. Results Summary & Sort Header
   ========================================================================== */
.colleges-results-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--spacing-4);
  padding: var(--spacing-6) 0 var(--spacing-4);
}

.results-count-text {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  margin-bottom: 0;
}

.results-count-number {
  font-weight: var(--font-weight-bold);
  color: var(--color-text);
}

.sort-wrapper {
  display: flex;
  align-items: center;
  gap: var(--spacing-2);
}

.sort-label {
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
  white-space: nowrap;
}

.sort-select {
  height: 36px;
  font-size: var(--font-size-xs);
  padding: 0 var(--spacing-3);
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
  background-color: var(--color-surface);
  color: var(--color-text);
}

/* ==========================================================================
   3. College Cards Grid
   ========================================================================== */
.colleges-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--spacing-6);
  padding-bottom: var(--spacing-8);
}

@media (max-width: 1023.98px) {
  .colleges-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 639.98px) {
  .colleges-grid {
    grid-template-columns: 1fr;
  }
}

.college-card {
  display: flex;
  flex-direction: column;
  padding: var(--spacing-6);
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-fast), border-color var(--transition-fast), box-shadow var(--transition-fast);
  position: relative;
}

.college-card:hover {
  transform: translateY(-2px);
  border-color: var(--color-secondary);
  box-shadow: var(--shadow-md);
}

.college-card-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: var(--spacing-3);
  margin-bottom: var(--spacing-3);
}

.college-card-title {
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-bold);
  color: var(--color-text);
  line-height: var(--line-height-snug);
  margin-bottom: 0;
}

.college-card-badges {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-1);
  margin-bottom: var(--spacing-4);
}

.college-card-meta {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-2);
  font-size: var(--font-size-xs);
  color: var(--color-text-secondary);
  flex-grow: 1;
  margin-bottom: var(--spacing-4);
}

.college-meta-item {
  display: flex;
  align-items: baseline;
  gap: var(--spacing-2);
}

.college-meta-label {
  color: var(--color-text-muted);
  font-weight: var(--font-weight-medium);
  min-width: 75px;
}

.college-meta-val {
  color: var(--color-text);
  font-weight: var(--font-weight-medium);
}

.college-card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-top: 1px solid var(--color-border);
  padding-top: var(--spacing-3);
  margin-top: auto;
}

/* ==========================================================================
   4. Pagination Component
   ========================================================================== */
.pagination-wrapper {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--spacing-6) 0 var(--spacing-12);
}

.pagination-nav {
  display: flex;
  align-items: center;
  gap: var(--spacing-1);
  list-style: none;
  margin: 0;
  padding: 0;
}

.pagination-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 38px;
  height: 38px;
  padding: 0 var(--spacing-3);
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
  background-color: var(--color-surface);
  color: var(--color-text);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  cursor: pointer;
  text-decoration: none !important;
  transition: background-color var(--transition-fast), border-color var(--transition-fast), color var(--transition-fast);
}

.pagination-btn:hover:not(:disabled):not(.disabled) {
  background-color: var(--color-surface-hover);
  border-color: var(--color-secondary);
  color: var(--color-secondary);
}

.pagination-btn.active,
.pagination-btn[aria-current="page"] {
  background-color: var(--color-secondary);
  border-color: var(--color-secondary);
  color: #ffffff !important;
  font-weight: var(--font-weight-bold);
}

.pagination-btn:disabled,
.pagination-btn.disabled {
  opacity: 0.4;
  cursor: not-allowed;
  pointer-events: none;
}

/* ==========================================================================
   5. Loading, Empty & Error States
   ========================================================================== */
.colleges-state-box {
  text-align: center;
  padding: var(--spacing-12) var(--spacing-4);
  background-color: var(--color-surface);
  border: 1px dashed var(--color-border);
  border-radius: var(--radius-xl);
  margin-bottom: var(--spacing-8);
}

.colleges-state-icon {
  font-size: 36px;
  line-height: 1;
  margin-bottom: var(--spacing-3);
}

.colleges-state-title {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-bold);
  color: var(--color-text);
  margin-bottom: var(--spacing-1);
}

.colleges-state-desc {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  max-width: 480px;
  margin: 0 auto var(--spacing-4);
}

/* Skeleton Loading Cards */
.skeleton-card {
  height: 240px;
  background: linear-gradient(90deg, var(--color-surface-raised) 25%, var(--color-surface-hover) 50%, var(--color-surface-raised) 75%);
  background-size: 200% 100%;
  animation: skeletonShimmer 1.5s infinite;
  border-radius: var(--radius-xl);
  border: 1px solid var(--color-border);
}

@keyframes skeletonShimmer {
  0% { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}

/* ==========================================================================
   6. College Detail Page Styles (/college/{slug})
   ========================================================================== */
.college-detail-wrapper {
  padding-bottom: var(--spacing-16);
}

.college-detail-hero {
  padding: var(--spacing-10) 0 var(--spacing-8);
  background: linear-gradient(180deg, var(--color-surface-raised) 0%, var(--color-surface) 100%);
  border-bottom: 1px solid var(--color-border);
}

[data-theme="dark"] .college-detail-hero {
  background: linear-gradient(180deg, rgba(15, 23, 42, 0.5) 0%, var(--color-surface) 100%);
}

.college-detail-badges {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-2);
  margin-bottom: var(--spacing-3);
}

.college-detail-title {
  font-size: clamp(var(--font-size-2xl), 4vw, var(--font-size-4xl));
  font-weight: var(--font-weight-extrabold, 800);
  color: var(--color-text);
  margin-bottom: var(--spacing-3);
  letter-spacing: -0.02em;
}

.college-detail-meta-row {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--spacing-4);
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
}

.college-detail-meta-item {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-1);
}

.college-detail-content {
  padding: var(--spacing-10) 0;
}

.college-detail-grid {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: var(--spacing-8);
}

@media (max-width: 1023.98px) {
  .college-detail-grid {
    grid-template-columns: 1fr;
  }
}

.college-info-card {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: var(--spacing-6);
  box-shadow: var(--shadow-sm);
  margin-bottom: var(--spacing-6);
}

.college-info-card-title {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-bold);
  color: var(--color-text);
  margin-bottom: var(--spacing-4);
  padding-bottom: var(--spacing-2);
  border-bottom: 1px solid var(--color-border);
}

.college-info-table {
  width: 100%;
  border-collapse: collapse;
}

.college-info-table th,
.college-info-table td {
  padding: var(--spacing-3) 0;
  border-bottom: 1px solid var(--color-border);
  font-size: var(--font-size-sm);
  text-align: left;
}

.college-info-table tr:last-child th,
.college-info-table tr:last-child td {
  border-bottom: none;
}

.college-info-table th {
  color: var(--color-text-muted);
  font-weight: var(--font-weight-medium);
  width: 35%;
}

.college-info-table td {
  color: var(--color-text);
  font-weight: var(--font-weight-semibold);
}

/* Sidebar Quick Navigation Cards */
.college-sidebar-card {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: var(--spacing-6);
  box-shadow: var(--shadow-sm);
  margin-bottom: var(--spacing-6);
}

.college-sidebar-title {
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-bold);
  color: var(--color-text);
  margin-bottom: var(--spacing-3);
}

.college-sidebar-links {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-2);
}

.college-sidebar-link {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--spacing-3);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  text-decoration: none !important;
  color: var(--color-text);
  background-color: var(--color-surface-raised);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  transition: border-color var(--transition-fast), color var(--transition-fast), transform var(--transition-fast);
}

.college-sidebar-link:hover {
  border-color: var(--color-secondary);
  color: var(--color-secondary);
  transform: translateX(2px);
}