/* Shared blog components: homepage preview, index listing, and related articles. */
.blog-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: clamp(20px, 2.4vw, 32px); }
@media (max-width: 880px) { .blog-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 600px) { .blog-grid { grid-template-columns: 1fr; } }

.blog-card { background: var(--card); border: 1px solid var(--border); border-radius: var(--radius-lg); overflow: hidden; display: flex; flex-direction: column; text-decoration: none; color: inherit; transition: border-color .25s, box-shadow .25s, transform .25s; }
.blog-card:hover { border-color: var(--accent-tint); transform: translateY(-3px); box-shadow: 0 1px 3px rgba(26,26,26,.04), 0 16px 36px rgba(140,35,50,.10); }
.blog-card-img { aspect-ratio: 1200 / 630; background: var(--bg-soft); overflow: hidden; position: relative; }
.blog-card-img img { width: 100%; height: 100%; object-fit: contain; display: block; transition: transform .4s ease; }
.blog-card:hover .blog-card-img img { transform: scale(1.04); }
.blog-card-img-placeholder { width: 100%; height: 100%; display: grid; place-items: center; color: var(--muted-soft); font-family: var(--font-en); font-size: 12px; letter-spacing: 0; text-transform: uppercase; }
.blog-card.is-video .blog-card-img img { object-fit: cover; }
.blog-card-play-badge { position: absolute; inset: 0; display: flex; align-items: center; justify-content: center; pointer-events: none; }
.blog-card-play-badge svg { width: 52px; height: 37px; filter: drop-shadow(0 2px 8px rgba(0,0,0,.35)); transition: transform .25s; }
.blog-card:hover .blog-card-play-badge svg { transform: scale(1.08); }
.blog-card-video-tag { display: inline-flex; align-items: center; }
.blog-card-video-tag svg { width: 22px; height: 15.5px; display: block; }
.blog-card-body { padding: 20px 22px 22px; display: flex; flex-direction: column; gap: 10px; flex: 1; }
.blog-card-meta { display: flex; align-items: center; flex-wrap: wrap; gap: 8px 10px; font-family: var(--font-en); font-size: 12px; color: var(--muted); letter-spacing: 0; }
.blog-card-category { display: inline-flex; align-items: center; min-height: 26px; padding: 4px 10px; border: 0; border-radius: var(--control-radius); background: var(--badge-admission-bg); color: var(--badge-admission-fg); font-family: var(--font-jp); font-size: 12px; font-weight: 600; line-height: 1.2; letter-spacing: 0; }
.blog-card-category.is-waseda { background: var(--badge-waseda-bg); color: var(--badge-waseda-fg); }
.blog-card-category.is-keio { background: var(--badge-keio-bg); color: var(--badge-keio-fg); }
.blog-card-category.is-sougou, .blog-card-category.is-ippan { background: var(--badge-admission-bg); color: var(--badge-admission-fg); }
.blog-card-title { font-family: var(--font-heading); font-size: 16px; font-weight: 600; line-height: 1.5; color: var(--fg); letter-spacing: var(--tracking-heading); }
.blog-card-excerpt { font-family: var(--font-jp); font-size: 14px; color: var(--muted); line-height: 1.85; display: -webkit-box; -webkit-line-clamp: 3; -webkit-box-orient: vertical; overflow: hidden; }

/* Loading geometry matches the card, so content swaps without a layout jump. */
.blog-skeleton-card { background: var(--card); border: 1px solid var(--border); border-radius: var(--radius-lg); overflow: hidden; }
.blog-skeleton-img, .blog-skeleton-line { background: linear-gradient(90deg, var(--bg-soft) 25%, #EFEFF1 37%, var(--bg-soft) 63%); background-size: 400% 100%; animation: blog-skeleton-pulse 1.4s ease infinite; }
.blog-skeleton-img { aspect-ratio: 1200 / 630; }
.blog-skeleton-body { padding: 20px 22px 22px; display: flex; flex-direction: column; gap: 12px; }
.blog-skeleton-line { height: 11px; border-radius: var(--radius); }
.blog-skeleton-line.is-title { height: 16px; width: 85%; }
.blog-skeleton-line.is-short { width: 55%; }
@keyframes blog-skeleton-pulse { 0% { background-position: 100% 50%; } 100% { background-position: 0% 50%; } }