/**
 * GET ENGINEERING SEAT — Public Exams 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 & Filter Section
   ========================================================================== */
.catalog-header {
  padding: var(--spacing-8) 0 var(--spacing-6);
  background-color: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
}

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

.catalog-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;
}

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

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

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

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

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

@media (max-width: 991px) {
  .filter-controls-row {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 640px) {
  .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);
  background-color: var(--color-bg-card, #ffffff);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 0 var(--spacing-3);
  color: var(--color-text);
  width: 100%;
}

[data-theme="dark"] .filter-select {
  background-color: var(--color-surface);
  border-color: var(--color-border);
  color: var(--color-text);
}

.filter-select:focus {
  outline: 2px solid var(--color-primary);
  outline-offset: 1px;
}

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

.active-filter-pill {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-2);
  padding: var(--spacing-1) var(--spacing-3);
  background-color: var(--color-primary-50, rgba(37, 99, 235, 0.08));
  color: var(--color-primary-700, #1d4ed8);
  border: 1px solid var(--color-primary-200, rgba(37, 99, 235, 0.25));
  border-radius: var(--radius-full);
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-medium);
}

[data-theme="dark"] .active-filter-pill {
  background-color: rgba(37, 99, 235, 0.18);
  color: var(--color-primary-300, #93c5fd);
  border-color: rgba(37, 99, 235, 0.35);
}

.active-filter-pill button {
  background: none;
  border: none;
  padding: 0;
  cursor: pointer;
  color: inherit;
  font-size: 14px;
  line-height: 1;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.active-filter-pill button:focus-visible {
  outline: 2px solid currentColor;
  border-radius: var(--radius-full);
}

/* ==========================================================================
   2. Results Header & Sorting
   ========================================================================== */
.catalog-results-section {
  padding: var(--spacing-8) 0;
}

.catalog-results-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--spacing-4);
  margin-bottom: var(--spacing-6);
}

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

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

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

.sort-select {
  height: 38px;
  padding: 0 var(--spacing-3);
  font-size: var(--font-size-sm);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background-color: var(--color-bg-card, #ffffff);
  color: var(--color-text);
}

[data-theme="dark"] .sort-select {
  background-color: var(--color-surface);
  border-color: var(--color-border);
  color: var(--color-text);
}

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

@media (max-width: 1024px) {
  .catalog-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-4);
  }
}

@media (max-width: 640px) {
  .catalog-grid {
    grid-template-columns: 1fr;
    gap: var(--spacing-4);
  }
}

.exam-card {
  display: flex;
  flex-direction: column;
  background-color: var(--color-bg-card, #ffffff);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--spacing-5);
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-base), box-shadow var(--transition-base), border-color var(--transition-base);
  position: relative;
  overflow: hidden;
}

.exam-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
  border-color: var(--color-primary-300, #93c5fd);
}

[data-theme="dark"] .exam-card {
  background-color: var(--color-surface);
}

[data-theme="dark"] .exam-card:hover {
  border-color: var(--color-primary-600, #2563eb);
}

.exam-card-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: var(--spacing-2);
  margin-bottom: var(--spacing-3);
}

.exam-card-badges {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-2);
}

.exam-card-title {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-semibold);
  color: var(--color-text);
  line-height: var(--line-height-snug);
  margin-bottom: var(--spacing-3);
}

.exam-card-title a {
  color: inherit;
  text-decoration: none;
}

.exam-card-title a:hover {
  color: var(--color-primary);
  text-decoration: underline;
}

.exam-card-meta {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-2);
  margin-bottom: var(--spacing-5);
  flex-grow: 1;
}

.meta-row {
  display: flex;
  align-items: baseline;
  gap: var(--spacing-2);
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
}

.meta-label {
  color: var(--color-text-muted);
  font-size: var(--font-size-xs);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  min-width: 110px;
  flex-shrink: 0;
}

.meta-value {
  color: var(--color-text);
  font-weight: var(--font-weight-medium);
  word-break: break-word;
}

.exam-card-footer {
  padding-top: var(--spacing-4);
  border-top: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--spacing-3);
}

.exam-card-footer a.btn {
  text-decoration: none;
}

/* ==========================================================================
   4. Pagination
   ========================================================================== */
.pagination-wrapper {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: var(--spacing-2);
  margin-top: var(--spacing-6);
  flex-wrap: wrap;
}

.pagination-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 40px;
  height: 40px;
  padding: 0 var(--spacing-3);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background-color: var(--color-bg-card, #ffffff);
  color: var(--color-text);
  cursor: pointer;
  transition: all var(--transition-base);
  text-decoration: none;
}

[data-theme="dark"] .pagination-btn {
  background-color: var(--color-surface);
  border-color: var(--color-border);
  color: var(--color-text);
}

.pagination-btn:hover:not(:disabled) {
  background-color: var(--color-surface-raised, #f1f5f9);
  border-color: var(--color-primary-400);
}

.pagination-btn:disabled {
  opacity: 0.45;
  cursor: not-allowed;
}

.pagination-btn.active {
  background-color: var(--color-primary);
  color: #ffffff;
  border-color: var(--color-primary);
  font-weight: var(--font-weight-bold);
}

/* ==========================================================================
   5. Empty & Error States
   ========================================================================== */
.state-box {
  text-align: center;
  padding: var(--spacing-12) var(--spacing-4);
  background-color: var(--color-bg-card, #ffffff);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  max-width: 600px;
  margin: 0 auto;
}

[data-theme="dark"] .state-box {
  background-color: var(--color-surface);
}

.state-box-icon {
  font-size: 48px;
  margin-bottom: var(--spacing-4);
  line-height: 1;
}

.state-box-title {
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-bold);
  color: var(--color-text);
  margin-bottom: var(--spacing-2);
}

.state-box-desc {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  line-height: var(--line-height-relaxed);
  margin-bottom: var(--spacing-6);
}

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

.detail-hero {
  padding: var(--spacing-10) 0;
  background-color: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  margin-bottom: var(--spacing-8);
}

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

.detail-title {
  font-size: clamp(var(--font-size-2xl), 4vw, var(--font-size-4xl));
  font-weight: var(--font-weight-extrabold);
  color: var(--color-text);
  line-height: var(--line-height-tight);
  margin-bottom: var(--spacing-4);
  letter-spacing: -0.025em;
}

.detail-meta-row {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-6);
  align-items: center;
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
}

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

.detail-content {
  margin-top: var(--spacing-8);
}

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

@media (max-width: 991px) {
  .detail-grid {
    grid-template-columns: 1fr;
    gap: var(--spacing-6);
  }
}

.info-card {
  background-color: var(--color-bg-card, #ffffff);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--spacing-6);
  box-shadow: var(--shadow-sm);
  margin-bottom: var(--spacing-6);
}

[data-theme="dark"] .info-card {
  background-color: var(--color-surface);
}

.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-3);
  border-bottom: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  gap: var(--spacing-2);
}

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

.info-table th,
.info-table td {
  padding: var(--spacing-3) var(--spacing-2);
  font-size: var(--font-size-sm);
  border-bottom: 1px solid var(--color-border);
  text-align: left;
}

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

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

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

.quick-links-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: var(--spacing-3);
}

.quick-link-item a {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--spacing-3) var(--spacing-4);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  text-decoration: none;
  color: var(--color-text);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  background-color: var(--color-surface-raised, #f8fafc);
  transition: all var(--transition-base);
}

[data-theme="dark"] .quick-link-item a {
  background-color: rgba(255, 255, 255, 0.03);
}

.quick-link-item a:hover {
  background-color: var(--color-primary-50, rgba(37, 99, 235, 0.08));
  border-color: var(--color-primary-300);
  color: var(--color-primary);
  transform: translateX(2px);
}

.external-link-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-2);
  width: 100%;
  padding: var(--spacing-3) var(--spacing-4);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-semibold);
  border-radius: var(--radius-md);
  text-decoration: none;
  background-color: var(--color-primary);
  color: #ffffff;
  transition: background-color var(--transition-base);
}

.external-link-btn:hover {
  background-color: var(--color-primary-hover, #1d4ed8);
  color: #ffffff;
}