/* SmokePDF — one layout for every article page (generated by build/prerender.js) */
.art-page { padding: 0 20px 88px; color: var(--dark, #0f172a); }
.art-head, .art-body { max-width: 760px; margin: 0 auto; }
.art-head { padding-top: 36px; }

.art-crumbs { display: flex; flex-wrap: wrap; gap: 6px 8px; font-size: 14px; color: var(--gray, #64748b); }
.art-crumbs a { color: var(--gray, #64748b); text-decoration: none; }
.art-crumbs a:hover { color: var(--primary, #4f46e5); text-decoration: underline; }
.art-crumbs span[aria-hidden] { opacity: .6; }

.art-cat { display: inline-block; margin-top: 18px; font-size: 13px; font-weight: 700; color: #4338ca; background: #eef2ff; padding: 4px 12px; border-radius: 999px; text-decoration: none; }
.art-cat:hover { background: #e0e7ff; }
.art-title { margin: 14px 0 0; font-size: clamp(1.75rem, 1.2rem + 2.2vw, 2.5rem); line-height: 1.35; font-weight: 800; letter-spacing: 0; color: var(--dark, #0f172a); }
body.en .art-title { line-height: 1.25; letter-spacing: -0.01em; }
.art-lead { margin: 14px 0 0; font-size: 1.15rem; line-height: 1.8; color: #475569; }

.art-byline { margin-top: 22px; padding: 16px 0; border-top: 1px solid var(--border, #e2e8f0); border-bottom: 1px solid var(--border, #e2e8f0); display: flex; flex-wrap: wrap; align-items: center; gap: 12px 14px; }
.art-byline img { width: 44px; height: 44px; border-radius: 999px; object-fit: cover; background: #c7d2fe; }
.art-byline-who { display: flex; flex-direction: column; gap: 1px; flex: 1 1 200px; min-width: 0; }
.art-byline-who a { font-weight: 700; color: var(--dark, #0f172a); text-decoration: none; }
.art-byline-who a:hover { color: var(--primary, #4f46e5); }
.art-byline-who span { font-size: 13px; color: var(--gray, #64748b); }
.art-byline-meta { display: flex; flex-wrap: wrap; gap: 4px 18px; font-size: 13px; color: #475569; }

.art-hero { max-width: 960px; margin: 28px auto 0; }
.art-hero img { display: block; width: 100%; height: auto; aspect-ratio: 16 / 9; object-fit: cover; border-radius: 16px; border: 1px solid #e0e7ff; background: #eef2ff; }

.art-body { font-size: 1.08rem; line-height: 1.95; }
body.en .art-body { line-height: 1.8; }
.art-body > p, .art-body > ul, .art-body > ol { margin: 0 0 1.15em; }
.art-body h2 { margin: 2.1em 0 .6em; font-size: clamp(1.35rem, 1.1rem + 1vw, 1.65rem); line-height: 1.5; font-weight: 800; color: var(--dark, #0f172a); border: 0; padding: 0; scroll-margin-top: 90px; }
.art-body h3 { margin: 1.6em 0 .5em; font-size: 1.22rem; line-height: 1.55; font-weight: 800; color: var(--dark, #0f172a); scroll-margin-top: 90px; }
.art-body h4 { margin: 1.3em 0 .4em; font-size: 1.08rem; font-weight: 700; }
.art-body ul, .art-body ol { padding-inline-start: 22px; }
.art-body li { margin-bottom: .45em; }
.art-body li::marker { color: var(--primary, #4f46e5); }
.art-body a { color: #4338ca; text-decoration: underline; text-underline-offset: 3px; text-decoration-thickness: 1px; }
.art-body a:hover { color: #3730a3; }
.art-body strong { font-weight: 700; color: var(--dark, #0f172a); }
.art-body code { font-size: .92em; background: #f1f5f9; border: 1px solid #e2e8f0; border-radius: 6px; padding: 1px 6px; direction: ltr; unicode-bidi: isolate; }
.art-body blockquote { margin: 1.4em 0; padding: 4px 18px; border-inline-start: 3px solid #c7d2fe; color: #334155; }

.art-toc { margin: 32px 0 28px; background: #fff; border: 1px solid var(--border, #e2e8f0); border-radius: 14px; padding: 18px 22px; }
.art-toc-title { font-size: 15px; font-weight: 800; color: var(--dark, #0f172a); margin-bottom: 6px; }
.art-toc ol { margin: 0; padding-inline-start: 20px; font-size: 15px; line-height: 2.05; color: var(--gray, #64748b); }
.art-toc li { margin: 0; }
.art-toc a { color: #334155; text-decoration: none; }
.art-toc a:hover { color: var(--primary, #4f46e5); text-decoration: underline; }

.art-body .quick-answer-box { margin: 26px 0; background: #eef2ff; border: 0; border-radius: 14px; padding: 20px 22px; }
.art-body .quick-answer-box h2, .art-body .quick-answer-box h3 { margin: 0 0 6px; font-size: 15px; font-weight: 800; color: #3730a3; line-height: 1.6; }
.art-body .quick-answer-box p { margin: 0 0 .6em; font-size: 1.02rem; line-height: 1.9; color: #1e1b4b; }
.art-body .quick-answer-box p:last-child, .art-body .quick-answer-box ul:last-child { margin-bottom: 0; }

.art-table { margin: 24px 0; overflow-x: auto; border: 1px solid var(--border, #e2e8f0); border-radius: 12px; background: #fff; }
.art-table table { width: 100%; border-collapse: collapse; font-size: .92rem; line-height: 1.7; border: 0; }
.art-table th { background: #f1f5f9; font-weight: 700; text-align: start; padding: 11px 14px; border: 0; }
.art-table td { padding: 11px 14px; border: 0; border-top: 1px solid var(--border, #e2e8f0); vertical-align: top; }

.art-faq { display: flex; flex-direction: column; gap: 12px; margin: 16px 0 8px; }
.art-faq details { background: #fff; border: 1px solid var(--border, #e2e8f0); border-radius: 12px; padding: 0 18px; }
.art-faq summary { list-style: none; cursor: pointer; padding: 15px 0; font-size: 1.02rem; font-weight: 700; line-height: 1.6; display: flex; justify-content: space-between; align-items: center; gap: 12px; }
.art-faq summary::-webkit-details-marker { display: none; }
.art-faq summary::after { content: "+"; flex: none; width: 26px; height: 26px; border-radius: 999px; background: #eef2ff; color: #4338ca; display: inline-flex; align-items: center; justify-content: center; font-weight: 800; }
.art-faq details[open] summary::after { content: "−"; }
.art-faq details > div { padding: 0 0 16px; font-size: 1rem; line-height: 1.9; color: #334155; }
.art-faq details > div p { margin: 0; }

.art-body #author-card { margin-top: 52px; }
.art-related { max-width: 1080px; margin: 60px auto 0; }
.art-related h2 { margin: 0 0 20px; font-size: 1.5rem; font-weight: 800; color: var(--dark, #0f172a); }

@media (max-width: 640px) {
  .art-page { padding: 0 16px 64px; }
  .art-head { padding-top: 20px; }
  .art-lead { font-size: 1.05rem; }
  .art-hero { margin-top: 20px; }
  .art-hero img { border-radius: 12px; }
  .art-body { font-size: 1.04rem; }
  .art-toc { padding: 16px 18px; }
}

.art-body #author-card a, .art-body .art-faq summary a { text-decoration: none; }
.art-body #author-card .author-card-btn { color: #fff; }