/* =====================================================================
   Blog - solo se carga en /blog y /blog/{slug} (no pesa en el resto de la web)
   ===================================================================== */
.blog-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 28px; }
.blog-card { display: flex; flex-direction: column; background: #fff; border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow); transition: transform .18s, box-shadow .18s; }
.blog-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-lg); }
.blog-card-img { display: block; aspect-ratio: 1200 / 630; background: var(--blue-light); }
.blog-card-img img { display: block; width: 100%; height: 100%; object-fit: cover; }
.blog-card-body { display: flex; flex-direction: column; gap: 8px; flex: 1; padding: 20px 22px 24px; }
.blog-card h2 { margin: 0; font-size: 1.2rem; line-height: 1.3; }
.blog-card h2 a { color: var(--ink); }
.blog-card h2 a:hover { color: var(--blue); text-decoration: none; }
.blog-card p { margin: 0; color: var(--muted); font-size: .95rem; }
.blog-card .blog-meta { font-size: .8rem; }
.blog-more { margin-top: auto; padding-top: 8px; font-weight: 600; font-size: .95rem; }
.blog-cat { color: var(--accent-dark); font-weight: 700; text-transform: uppercase; letter-spacing: .06em; }

.blog-card.is-featured { grid-column: 1 / -1; flex-direction: row; }
.blog-card.is-featured .blog-card-img { flex: 0 0 55%; aspect-ratio: auto; }
.blog-card.is-featured .blog-card-body { justify-content: center; padding: 32px 36px; gap: 12px; }
.blog-card.is-featured h2 { font-size: clamp(1.5rem, 2.6vw, 2.1rem); }
.blog-card.is-featured p { font-size: 1.02rem; }

.blog-pager { display: flex; align-items: center; justify-content: center; gap: 18px; margin-top: 40px; }

.blog-tags { display: flex; flex-wrap: wrap; gap: 8px; list-style: none; margin: 28px 0 0; padding: 0; }
.blog-tags li { background: var(--blue-light); color: var(--navy-2); font-size: .82rem; font-weight: 600; padding: 5px 12px; border-radius: 99px; }
.blog-topics { margin-top: 64px; }
.blog-topics h2 { font-size: 1.2rem; }

/* ---------- Portada: últimas 4 entradas ---------- */
.blog-grid.blog-grid-4 { grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 20px; }
.blog-grid-4 .blog-card-body { padding: 16px 18px 20px; }
.blog-grid-4 .blog-card h2 { font-size: 1.05rem; }
.blog-grid-4 .blog-card p { font-size: .9rem; }
@media (max-width: 1100px) { .blog-grid.blog-grid-4 { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
@media (max-width: 640px) { .blog-grid.blog-grid-4 { grid-template-columns: 1fr; } }

/* ---------- Entrada ---------- */
.post { padding-top: 40px; }
.post-head h1 { font-size: clamp(1.9rem, 4vw, 2.7rem); margin-bottom: .4em; }
.post-lead { font-size: 1.18rem; color: var(--muted); margin-bottom: .8em; }
.post-cover { margin: 24px 0 32px; border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow); background: var(--blue-light); aspect-ratio: 1200 / 630; }
.post-cover img { display: block; width: 100%; height: 100%; object-fit: cover; }

.post-toc { background: var(--bg); border-radius: var(--radius-sm); padding: 18px 24px; margin: 0 0 32px; }
.post-toc ol { margin: 10px 0 0; padding-left: 20px; }
.post-toc li { margin: 4px 0; }

.post-body { font-size: 1.07rem; line-height: 1.75; }
.post-body h2 { font-size: 1.6rem; margin: 2em 0 .6em; }
.post-body h3 { font-size: 1.2rem; margin: 1.6em 0 .5em; }
.post-body ul, .post-body ol { padding-left: 22px; margin: 0 0 1.2em; }
.post-body li { margin: .35em 0; }
.post-body a { text-decoration: underline; text-underline-offset: 2px; }
.post-body strong { color: var(--ink); }
.post-body .callout { background: var(--accent-soft); border-left: 4px solid var(--accent); padding: 14px 18px; border-radius: 0 var(--radius-sm) var(--radius-sm) 0; margin: 1.4em 0; }
.post-body .callout p:last-child { margin: 0; }

.post-faq { margin-top: 2.4em; }
.post-faq h2 { font-size: 1.6rem; }
.post-cta { margin-top: 48px; }

/* Migas de pan de la entrada: más contraste sobre fondo claro */
.post .lh-crumbs, .post .lh-crumbs ol, .post .lh-crumbs li { color: #475569; }
.post .lh-crumbs a { color: #0B3D91; font-weight: 600; text-decoration: none; }
.post .lh-crumbs a:hover { color: #E4630A; text-decoration: underline; }
.post .lh-crumbs li:not(:last-child)::after, .post .lh-crumbs li + li::before { color: #64748B; }
.post .lh-crumbs [aria-current="page"] { color: #1E293B; font-weight: 600; }

/* Barra de progreso de lectura (fija arriba) */
.read-progress { position: fixed; top: 0; left: 0; right: 0; height: 4px; z-index: 1000; background: transparent; pointer-events: none; }
.read-progress span { display: block; height: 100%; width: 100%; transform: scaleX(0); transform-origin: 0 50%; background: linear-gradient(90deg, #1565C0, #FF7A1A); border-radius: 0 3px 3px 0; will-change: transform; }

/* Botón volver arriba */
.go-top { position: fixed; right: 20px; bottom: 20px; width: 46px; height: 46px; border: 0; border-radius: 50%; background: #0B3D91; color: #fff; display: grid; place-items: center; cursor: pointer; box-shadow: 0 6px 18px rgba(11, 42, 91, .35); opacity: 0; visibility: hidden; transform: translateY(12px); transition: opacity .25s, transform .25s, visibility .25s, background .2s; z-index: 900; }
.go-top.is-visible { opacity: 1; visibility: visible; transform: none; }
.go-top:hover, .go-top:focus-visible { background: #FF7A1A; }
.go-top svg { width: 22px; height: 22px; }
@media (prefers-reduced-motion: reduce) { .go-top { transition: none; } }

@media (max-width: 900px) {
  .blog-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 640px) {
  .blog-grid { grid-template-columns: 1fr; gap: 22px; }
  .blog-card.is-featured { flex-direction: column; }
  .blog-card.is-featured .blog-card-img { flex: none; aspect-ratio: 1200 / 630; }
  .blog-card.is-featured .blog-card-body { padding: 20px 22px 24px; }
  .post { padding-top: 24px; }
}