/**
 * Post Card Styles
 * 記事カードコンポーネント - 統一されたカードデザイン
 * すべて16:9アスペクト比で統一
 */

/* ============================================
   Base Post Card
   ============================================ */
.post-card {
  display: flex;
  flex-direction: column;
  background-color: var(--bg-main);
  border-radius: var(--radius-xl);
  overflow: hidden;
  box-shadow: var(--shadow-card);
  transition: transform var(--transition-base) var(--ease-out-cubic),
              box-shadow var(--transition-base) var(--ease-out-cubic);
  height: 100%;
}

.post-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-card-hover);
}

/* ============================================
   Card Image - 16:9 Aspect Ratio
   ============================================ */
.post-card__image {
  position: relative;
  display: block;
  width: 100%;
  aspect-ratio: 16 / 9;
  overflow: hidden;
  background-color: var(--bg-soft);
}

.post-card__image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-slow) var(--ease-out-cubic);
}

/* Fallback for older browsers */
@supports not (aspect-ratio: 16 / 9) {
  .post-card__image {
    position: relative;
    padding-top: 56.25%;
  }

  .post-card__image img {
    position: absolute;
    top: 0;
    left: 0;
  }
}

.post-card:hover .post-card__image img {
  transform: scale(1.08);
}

/* Category label on image */
.post-card__label {
  position: absolute;
  top: var(--space-sm);
  left: var(--space-sm);
  z-index: 2;
}

.post-card__category-badge {
  display: inline-block;
  padding: var(--space-2xs) var(--space-sm);
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-semibold);
  letter-spacing: var(--letter-spacing-wide);
  text-transform: uppercase;
  color: var(--text-invert);
  background-color: var(--accent-main);
  border-radius: var(--radius-sm);
}

/* ============================================
   Card Content
   ============================================ */
.post-card__content {
  display: flex;
  flex-direction: column;
  flex: 1;
  padding: var(--space-lg);
  gap: var(--space-xs);
}

/* ============================================
   Card Meta
   ============================================ */
.post-card__meta {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  margin-bottom: var(--space-xs);
}

.post-card__category {
  display: inline-flex;
  align-items: center;
  padding: var(--space-2xs) var(--space-sm);
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-medium);
  color: var(--accent-main);
  background-color: var(--accent-soft);
  border-radius: var(--radius-full);
  text-decoration: none;
  transition: all var(--transition-fast);
}

.post-card__category:hover {
  background-color: var(--accent-main);
  color: var(--text-invert);
}

.post-card__date {
  font-size: var(--font-size-xs);
  color: var(--text-muted);
}

/* ============================================
   Card Title
   ============================================ */
.post-card__title {
  margin: 0 0 var(--space-xs);
  font-size: var(--font-size-md);
  font-weight: var(--font-weight-semibold);
  line-height: var(--line-height-snug);
}

.post-card__title a {
  color: var(--text-main);
  text-decoration: none;
  transition: color var(--transition-fast);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.post-card__title a:hover {
  color: var(--accent-main);
}

/* ============================================
   Card Excerpt
   ============================================ */
.post-card__excerpt {
  margin: 0 0 var(--space-sm);
  font-size: var(--font-size-sm);
  color: var(--text-sub);
  line-height: var(--line-height-relaxed);
  flex: 1;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* ============================================
   Card Link / Read More
   ============================================ */
.post-card__link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  color: var(--accent-main);
  text-decoration: none;
  margin-top: auto;
  transition: color var(--transition-fast), gap var(--transition-fast);
}

.post-card__link:hover {
  color: var(--accent-strong);
  gap: var(--space-sm);
}

.post-card__link svg {
  width: 16px;
  height: 16px;
  flex-shrink: 0;
  transition: transform var(--transition-fast);
}

.post-card__link:hover svg {
  transform: translateX(4px);
}

/* ============================================
   Card Variations
   ============================================ */

/* Compact Card - smaller padding */
.post-card--compact .post-card__content {
  padding: var(--space-md);
}

.post-card--compact .post-card__title {
  font-size: var(--font-size-base);
}

.post-card--compact .post-card__excerpt {
  -webkit-line-clamp: 2;
}

/* Featured Card - larger size */
.post-card--featured {
  grid-column: span 2;
}

.post-card--featured .post-card__title {
  font-size: var(--font-size-xl);
}

/* Horizontal Card */
.post-card--horizontal {
  flex-direction: row;
}

.post-card--horizontal .post-card__image {
  width: 40%;
  flex-shrink: 0;
  aspect-ratio: 16 / 9;
}

.post-card--horizontal .post-card__content {
  width: 60%;
  justify-content: center;
}

/* No Image Card */
.post-card--no-image .post-card__content {
  padding: var(--space-xl);
}

.post-card--no-image .post-card__title {
  font-size: var(--font-size-lg);
}

/* Dark Card */
.post-card--dark {
  background: var(--gradient-dark);
}

.post-card--dark .post-card__title a {
  color: var(--text-invert);
}

.post-card--dark .post-card__title a:hover {
  color: var(--forest-200);
}

.post-card--dark .post-card__excerpt {
  color: rgba(255, 255, 255, 0.7);
}

.post-card--dark .post-card__date {
  color: rgba(255, 255, 255, 0.5);
}

.post-card--dark .post-card__link {
  color: var(--forest-200);
}

/* ============================================
   Responsive Design
   ============================================ */
@media (max-width: 1024px) {
  .post-card--featured {
    grid-column: span 1;
  }

  .post-card--featured .post-card__title {
    font-size: var(--font-size-lg);
  }
}

@media (max-width: 768px) {
  .post-card__content {
    padding: var(--space-md);
  }

  .post-card__title {
    font-size: var(--font-size-base);
  }

  .post-card__excerpt {
    -webkit-line-clamp: 2;
  }

  .post-card--horizontal {
    flex-direction: column;
  }

  .post-card--horizontal .post-card__image {
    width: 100%;
  }

  .post-card--horizontal .post-card__content {
    width: 100%;
  }
}

@media (max-width: 480px) {
  .post-card__content {
    padding: var(--space-sm);
  }

  .post-card__title {
    font-size: var(--font-size-sm);
  }

  .post-card__meta {
    flex-wrap: wrap;
    gap: var(--space-xs);
  }
}

/* 360px以下の超小型スマホ対応 */
@media (max-width: 360px) {
  .post-card {
    border-radius: var(--radius-lg);
  }

  .post-card__content {
    padding: var(--space-xs);
    gap: var(--space-2xs);
  }

  .post-card__label {
    top: var(--space-xs);
    left: var(--space-xs);
  }

  .post-card__category-badge {
    padding: 2px var(--space-xs);
    font-size: 9px;
  }

  .post-card__category {
    padding: 2px var(--space-xs);
    font-size: 9px;
  }

  .post-card__date {
    font-size: 10px;
  }

  .post-card__title {
    font-size: var(--font-size-xs);
    margin-bottom: var(--space-2xs);
  }

  .post-card__excerpt {
    font-size: var(--font-size-xs);
    -webkit-line-clamp: 2;
    margin-bottom: var(--space-xs);
  }

  .post-card__link {
    font-size: var(--font-size-xs);
  }

  .post-card__link svg {
    width: 14px;
    height: 14px;
  }

  .post-card--compact .post-card__content {
    padding: var(--space-xs);
  }

  .post-card--compact .post-card__title {
    font-size: var(--font-size-xs);
  }
}