/* ==========================================================================
   Blog: index cards and the article page (hero, cover, body typography,
   sticky contents sidebar, share bar, author box, related posts).
   ========================================================================== */

/* ---------- Index ---------- */
.blog-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(min(100%, 300px), 1fr)); gap: var(--s-5, 1.5rem); margin-top: var(--s-5, 1.5rem); }
.blog-card { display: flex; flex-direction: column; overflow: hidden; background: var(--surface); border: 1px solid var(--border); border-radius: var(--r-lg, 12px); transition: transform 0.15s, box-shadow 0.15s; }
.blog-card:hover { transform: translateY(-2px); box-shadow: 0 10px 30px -12px rgb(15 23 42 / 0.25); }
.blog-card__image { display: block; aspect-ratio: 1.91 / 1; background: var(--surface-2); overflow: hidden; }
.blog-card__image img { display: block; width: 100%; height: 100%; object-fit: cover; }
.blog-card__body { display: grid; gap: 6px; padding: var(--s-4, 1rem); }
.blog-card__title { margin: 0; font-size: 1.1rem; line-height: 1.35; }
.blog-card__title a { color: inherit; text-decoration: none; }
.blog-card__title a:hover { color: var(--primary, #4f46e5); }
.blog-card__meta { margin: 0; color: var(--text-2); font-size: 0.85rem; }
.blog-card__text { margin: 0; color: var(--text-2); }
.blog-pager { justify-content: center; margin-top: var(--s-6, 2rem); }

/* ---------- Article page ---------- */
.blog-progress { position: fixed; top: 0; left: 0; right: 0; z-index: 60; height: 3px; pointer-events: none; }
.blog-progress span { display: block; width: 0; height: 100%; background: linear-gradient(90deg, var(--primary, #4f46e5), #a855f7); transition: width 0.1s linear; }
.blog-page { max-width: 1160px; }
.blog-crumbs .breadcrumb ol { flex-wrap: nowrap; min-width: 0; }
.blog-crumbs .breadcrumb li { flex: none; }
.blog-crumbs .breadcrumb li:last-child { flex: 0 1 auto; min-width: 0; }
.blog-crumbs .breadcrumb li:last-child span { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }

.blog-hero { max-width: 820px; margin: var(--s-4, 1rem) 0 var(--s-5, 1.5rem); }
.blog-hero__tags { display: flex; flex-wrap: wrap; gap: 6px; margin: 0 0 12px; }
.blog-hero__title { margin: 0 0 14px; font-size: clamp(1.75rem, 1.2rem + 2.2vw, 2.75rem); line-height: 1.15; letter-spacing: -0.02em; text-wrap: balance; }
.blog-hero__lead { margin: 0 0 18px; color: var(--text-2); font-size: 1.15rem; line-height: 1.6; }
.blog-pill { display: inline-flex; align-items: center; padding: 3px 10px; border-radius: 999px; background: color-mix(in srgb, var(--primary, #4f46e5) 12%, transparent); color: var(--primary, #4f46e5); font-size: 0.78rem; font-weight: 600; letter-spacing: 0.01em; text-transform: uppercase; }
.blog-pill--soft { background: var(--surface-2); color: var(--text-2); text-transform: none; font-weight: 500; font-size: 0.85rem; }
.blog-meta { display: flex; align-items: center; gap: 12px; }
.blog-meta__avatar { display: grid; place-items: center; flex: none; width: 42px; height: 42px; border-radius: 50%; background: linear-gradient(135deg, var(--primary, #4f46e5), #a855f7); color: #fff; font-weight: 700; }
.blog-meta__avatar--lg { width: 56px; height: 56px; font-size: 1.3rem; }
.blog-meta__text { display: grid; gap: 2px; font-size: 0.9rem; color: var(--text-2); }
.blog-meta__text strong { color: var(--text); }

.blog-cover { margin: 0 0 var(--s-6, 2rem); }
.blog-cover img { display: block; width: 100%; max-height: 560px; object-fit: cover; border-radius: 16px; box-shadow: 0 24px 60px -30px rgb(15 23 42 / 0.45); }

.blog-layout { display: grid; grid-template-columns: minmax(0, 1fr); gap: var(--s-6, 2rem); }
@media (min-width: 1100px) {
    .blog-layout { grid-template-columns: minmax(0, 1fr) 280px; gap: 56px; }
    .blog-toc--inline { display: none; }
}
.blog-article { min-width: 0; max-width: 760px; }

/* Body typography */
.blog-body { font-size: 1.0625rem; line-height: 1.8; color: var(--text); overflow-wrap: anywhere; }
.blog-body > :first-child { margin-top: 0; }
.blog-body p { margin: 0 0 1.25em; }
.blog-body h2 { margin: 2.2em 0 0.7em; padding-top: 0.2em; font-size: 1.6rem; line-height: 1.25; letter-spacing: -0.01em; scroll-margin-top: 90px; }
.blog-body h3 { margin: 1.8em 0 0.5em; font-size: 1.25rem; line-height: 1.35; scroll-margin-top: 90px; }
.blog-body h4 { margin: 1.5em 0 0.4em; font-size: 1.05rem; }
.blog-body a { color: var(--primary, #4f46e5); text-decoration: underline; text-decoration-thickness: 1px; text-underline-offset: 3px; }
.blog-body a:hover { text-decoration-thickness: 2px; }
.blog-body strong, .blog-body b { color: var(--text); font-weight: 650; }
.blog-body ul, .blog-body ol { margin: 0 0 1.4em; padding-left: 1.4em; }
.blog-body li { margin: 0.45em 0; padding-left: 0.2em; }
.blog-body li::marker { color: var(--primary, #4f46e5); }
.blog-body ol > li::marker { font-weight: 700; }
.blog-body img { display: block; max-width: 100%; height: auto; margin: 1.6em auto; border-radius: 12px; }
.blog-body figure { margin: 1.8em 0; }
.blog-body figcaption { margin-top: 8px; color: var(--text-2); font-size: 0.875rem; text-align: center; }
.blog-body code { padding: 0.15em 0.4em; border-radius: 6px; background: var(--surface-2); font-size: 0.88em; }
.blog-body pre { margin: 1.6em 0; padding: 16px 18px; overflow-x: auto; border-radius: 12px; background: #0f172a; color: #e2e8f0; font-size: 0.9rem; line-height: 1.6; }
.blog-body pre code { padding: 0; background: none; color: inherit; }
.blog-body blockquote { position: relative; margin: 1.8em 0; padding: 18px 22px 18px 26px; border-left: 4px solid var(--primary, #4f46e5); border-radius: 0 12px 12px 0; background: var(--surface-2); color: var(--text); font-size: 1.1rem; font-style: italic; }
.blog-body blockquote p:last-child { margin-bottom: 0; }
.blog-body hr { margin: 2.5em 0; border: 0; border-top: 1px solid var(--border); }
.blog-body table { display: block; width: 100%; margin: 1.6em 0; overflow-x: auto; border-collapse: collapse; font-size: 0.95rem; }
.blog-body th, .blog-body td { padding: 10px 14px; border: 1px solid var(--border); text-align: left; vertical-align: top; }
.blog-body th { background: var(--surface-2); font-weight: 650; }
.blog-body tr:nth-child(even) td { background: color-mix(in srgb, var(--surface-2) 45%, transparent); }
.blog-body mark { padding: 0 3px; border-radius: 3px; }

/* Contents */
.blog-toc ol { margin: 0; padding: 0; list-style: none; }
.blog-toc li { margin: 0; }
.blog-toc a { display: block; padding: 5px 10px; border-left: 2px solid var(--border); color: var(--text-2); font-size: 0.875rem; line-height: 1.4; text-decoration: none; }
.blog-toc a:hover { color: var(--text); border-left-color: var(--text-3, #94a3b8); }
.blog-toc a.is-active { border-left-color: var(--primary, #4f46e5); color: var(--primary, #4f46e5); font-weight: 600; }
.blog-toc__l3 a { padding-left: 22px; font-size: 0.82rem; }
.blog-toc--inline { margin: 0 0 var(--s-5, 1.5rem); padding: 12px 16px; border: 1px solid var(--border); border-radius: 12px; background: var(--surface); }
.blog-toc--inline summary { cursor: pointer; font-weight: 600; }
.blog-toc--inline ol { margin-top: 10px; }

/* Sidebar */
.blog-side { display: none; }
@media (min-width: 1100px) {
    .blog-side { display: grid; align-content: start; gap: 20px; position: sticky; top: 84px; max-height: calc(100vh - 100px); overflow: auto; }
}
.blog-side__title { margin: 0 0 8px; color: var(--text-3, #64748b); font-size: 0.75rem; font-weight: 700; letter-spacing: 0.08em; text-transform: uppercase; }
.blog-side__card { padding: 16px; border: 1px solid var(--border); border-radius: 12px; background: var(--surface); }
.blog-side__tools { display: grid; gap: 4px; margin: 0 0 12px; padding: 0; list-style: none; font-size: 0.9rem; }
.blog-side__tools a { color: var(--text); text-decoration: none; }
.blog-side__tools a:hover { color: var(--primary, #4f46e5); }

/* After the article */
.blog-tags { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; margin-top: var(--s-6, 2rem); }
.blog-tags__label, .blog-share__label { margin-right: 4px; color: var(--text-2); font-size: 0.85rem; font-weight: 600; }
.blog-share { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; margin-top: var(--s-5, 1.5rem); padding: 16px 0; border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); }
.blog-author { display: flex; gap: 16px; align-items: flex-start; margin-top: var(--s-5, 1.5rem); padding: 20px; border-radius: 14px; background: var(--surface-2); }
.blog-author__name { margin: 0 0 4px; font-weight: 700; }
.blog-author__text { margin: 0; color: var(--text-2); font-size: 0.95rem; }
.blog-more { margin-top: var(--s-7, 3rem); padding-top: var(--s-5, 1.5rem); border-top: 1px solid var(--border); }
.blog-more h2 { margin: 0; font-size: 1.4rem; }
.blog-back { margin-top: var(--s-5, 1.5rem); }

@media (max-width: 600px) {
    .blog-body { font-size: 1rem; line-height: 1.75; }
    .blog-body h2 { font-size: 1.35rem; }
    .blog-cover img { border-radius: 12px; }
    .blog-author { flex-direction: column; }
}