/* ========================================
   Guide List Page Styles
   Grid + Category Filter
   ======================================== */

/* --- Page Header --- */
.guide-header {
  margin-bottom: var(--spacing-xl);
}

.guide-header h1 {
  font-size: var(--font-size-3xl);
  font-weight: 700;
  margin-bottom: var(--spacing-sm);
}

.guide-header p {
  font-size: var(--font-size-md);
  color: var(--color-text-sub);
}

/* --- Category Filter --- */
.category-filter {
  display: flex;
  gap: var(--spacing-lg);
  border-bottom: 1px solid var(--color-border);
  margin-bottom: var(--spacing-xl);
  overflow-x: auto;
  white-space: nowrap;
  padding-bottom: 2px;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
}

.category-filter::-webkit-scrollbar {
  display: none;
}

.category-btn {
  font-size: var(--font-size-md);
  font-weight: 600;
  color: var(--color-text-weak);
  padding: 12px 4px;
  cursor: pointer;
  position: relative;
  transition: color var(--transition-base);
  flex-shrink: 0;
}

.category-btn:hover {
  color: var(--color-text-main);
}

.category-btn.active {
  color: var(--color-text-main);
  font-weight: 700;
}

.category-btn.active::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 100%;
  height: 2px;
  background-color: var(--color-text-main);
}

/* --- Content Grid --- */
.content-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--spacing-lg);
  row-gap: var(--spacing-2xl);
  transition: opacity var(--transition-base);
}

/* --- Content Card --- */
.content-card {
  display: flex;
  flex-direction: column;
  cursor: pointer;
  transition: transform var(--transition-base);
  text-decoration: none;
  color: inherit;
}

.content-card:hover {
  transform: translateY(-4px);
}

.card-thumbnail {
  width: 100%;
  aspect-ratio: 1 / 1;
  border-radius: var(--radius-lg);
  overflow: hidden;
  margin-bottom: var(--spacing-md);
  position: relative;
  box-shadow: var(--shadow-sm);
  border: 1px solid rgba(0, 0, 0, 0.04);
}

.card-thumbnail img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-slow);
}

.content-card:hover .card-thumbnail img {
  transform: scale(1.05);
}

.thumb-text {
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 48px;
}

.card-info {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xs);
}

.card-badge {
  display: inline-block;
  font-size: var(--font-size-xs);
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 2px;
}

.card-info h3 {
  font-size: var(--font-size-md);
  font-weight: 700;
  color: var(--color-text-main);
  line-height: 1.4;
}

.card-info p {
  font-size: var(--font-size-sm);
  color: var(--color-text-sub);
  line-height: 1.5;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* --- Thumbnail Fallback Background --- */
.card-thumbnail {
  background: var(--color-surface);
}

/* ========================================
   Responsive
   ======================================== */
@media (max-width: 1023px) {
  .content-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (max-width: 767px) {
  .content-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-md);
    row-gap: var(--spacing-xl);
  }

  .category-filter {
    gap: var(--spacing-md);
  }

  .category-btn {
    font-size: var(--font-size-sm);
  }
}

@media (max-width: 480px) {
  .content-grid {
    grid-template-columns: 1fr;
  }
}