/* ===============================================================
   articles.html (一覧) Scoped Styles
   Scope: body.page-articles
=============================================================== */

/* Page Background */
.page-articles {
  background-color: var(--background-color-light, #f9fafb);
}

/* Section Spacing */
.page-articles .articles-index-section {
  padding-top: var(--space-3xl, 48px);
  padding-bottom: var(--space-4xl, 64px);
}

.page-articles .section-header {
  margin-bottom: var(--space-xl, 32px);
  text-align: center;
}

.page-articles .section-header h1 {
  font-size: var(--font-size-2xl, 2rem);
  font-weight: 700;
  color: var(--text-color-primary, #111827);
  margin-bottom: var(--space-sm, 8px);
}

.page-articles .section-header p {
  color: var(--text-color-secondary, #6b7280);
  font-size: 1rem;
}

/* Grid Layout */
.page-articles .articles-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr); /* Desktop: 3 cols */
  gap: 24px; /* Space between cards */
  margin-top: var(--space-xl, 32px);
}

@media (max-width: 900px) {
  .page-articles .articles-grid {
    grid-template-columns: repeat(2, 1fr); /* Tablet: 2 cols */
  }
}

@media (max-width: 600px) {
  .page-articles .articles-grid {
    grid-template-columns: 1fr; /* Mobile: 1 col */
  }
}

/* Card Design */
.page-articles .article-card {
  display: flex;
  flex-direction: column;
  background: white;
  border-radius: 12px;
  overflow: hidden;
  box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.05), 0 2px 4px -1px rgba(0, 0, 0, 0.03);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
  height: 100%;
  border: 1px solid var(--border-color, #e5e7eb);
  text-decoration: none;
  color: inherit;
  position: relative; /* For focus pseudo-element */
}

.page-articles .article-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
}

.page-articles .article-card:focus-visible {
  outline: none;
  box-shadow: 0 0 0 4px rgba(59, 130, 246, 0.5); /* Focus ring */
}

/* Image Wrapper (Fixed Aspect Ratio) */
.page-articles .article-card-image-wrapper {
  aspect-ratio: 16 / 9;
  width: 100%;
  overflow: hidden;
  background-color: #e5e7eb; /* Fallback color */
  position: relative;
}

.page-articles .article-card-image {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.3s ease;
}

.page-articles .article-card:hover .article-card-image {
  transform: scale(1.05);
}

/* Card Content */
.page-articles .article-card-content {
  padding: 20px;
  flex: 1;
  display: flex;
  flex-direction: column;
}

/* Tag */
.page-articles .article-card-tag {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--primary-color, #2563eb);
  background-color: #eff6ff;
  padding: 4px 8px;
  border-radius: 999px;
  margin-bottom: 12px;
  align-self: flex-start;
}

/* Title */
.page-articles .article-card-title {
  font-size: 1.125rem;
  font-weight: 700;
  line-height: 1.5;
  color: var(--text-color-primary, #111827);
  margin-bottom: 12px;
  /* Clamp to 3 lines */
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
  flex: 1; /* Push meta down */
}

/* Meta Info */
.page-articles .article-card-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.875rem;
  color: var(--text-color-secondary, #6b7280);
  margin-top: auto;
  border-top: 1px solid #f3f4f6;
  padding-top: 12px;
}

.page-articles .article-card-meta time {
  font-variant-numeric: tabular-nums;
}

/* Mobile Optimizations */
@media (max-width: 600px) {
  .page-articles .article-card-content {
    padding: 16px;
  }
  .page-articles .article-card-title {
    font-size: 1rem;
  }
}