/* ════════════════════════════════════════
   syz-rodend article.css — single article layout
   ════════════════════════════════════════ */

.syz-reading-progress {
  position: fixed; top: 64px; left: 0; height: 3px; background: var(--accent-blue);
  width: 0%; z-index: 98; transition: width 0.1s ease;
}

.syz-article-header { background: #FFFFFF; border-bottom: 1px solid var(--border-hairline); padding: 48px 24px 36px 24px; }
.syz-article-header-inner { max-width: 1360px; margin: 0 auto; }
.syz-breadcrumb {
  font-family: var(--font-mono); font-size: 12px; color: var(--text-muted); margin-bottom: 16px;
  display: flex; flex-wrap: wrap; align-items: center; gap: 6px;
}
.syz-breadcrumb a { color: var(--text-muted); }
.syz-breadcrumb a:hover { color: var(--accent-blue); }

.syz-article-badge-row { display: flex; flex-wrap: wrap; align-items: center; gap: 10px; margin-bottom: 16px; }
.syz-meta-tag {
  font-family: var(--font-mono); font-size: 11.5px; color: var(--text-muted);
  background: var(--bg-subtle); border: 1px solid var(--border-hairline); padding: 3px 8px; border-radius: var(--radius-sm);
}
.syz-article-h1 { font-family: var(--font-heading); font-size: clamp(28px, 4.5vw, 44px); font-weight: 800; color: var(--text-main); letter-spacing: -0.8px; line-height: 1.2; margin-bottom: 16px; }
.syz-article-lead { font-size: 17px; color: var(--text-muted); line-height: 1.6; max-width: 920px; }

.syz-article-layout { max-width: 1360px; margin: 40px auto 80px auto; padding: 0 24px; display: grid; grid-template-columns: 1fr; gap: 48px; }
@media (min-width: 1024px) { .syz-article-layout { grid-template-columns: 280px 1fr; } }

.syz-toc-sidebar { display: none; }
@media (min-width: 1024px) {
  .syz-toc-sidebar { display: block; position: sticky; top: 90px; height: fit-content; max-height: calc(100vh - 120px); overflow-y: auto; }
}
.syz-toc-box { background: #FFFFFF; border: 1px solid var(--border-hairline); border-radius: var(--radius-lg); padding: 20px; box-shadow: var(--shadow-subtle); }
.syz-toc-title { font-family: var(--font-heading); font-size: 13px; font-weight: 700; text-transform: uppercase; letter-spacing: 0.6px; color: var(--text-main); margin-bottom: 12px; }
.syz-toc-list { list-style: none; display: flex; flex-direction: column; gap: 8px; font-size: 13px; margin: 0; padding: 0; }
.syz-toc-link { color: var(--text-muted); display: block; padding: 4px 8px; border-radius: var(--radius-sm); transition: all 0.15s; text-decoration: none; }
.syz-toc-link:hover, .syz-toc-link.is-active { color: var(--accent-blue); background: var(--accent-blue-light); font-weight: 600; }

.syz-article-body { max-width: 860px; font-size: 16px; color: var(--text-body); }
.syz-article-body h2 { font-family: var(--font-heading); font-size: 26px; font-weight: 800; color: var(--text-main); letter-spacing: -0.5px; margin: 48px 0 16px 0; padding-bottom: 8px; border-bottom: 1px solid var(--border-hairline); scroll-margin-top: 90px; }
.syz-article-body h3 { font-family: var(--font-heading); font-size: 19px; font-weight: 700; color: var(--text-main); margin: 32px 0 12px 0; scroll-margin-top: 90px; }
.syz-article-body p { margin: 0 0 20px 0; }
.syz-article-body ul, .syz-article-body ol { margin: 0 0 20px 24px; padding: 0; }
.syz-article-body li { margin-bottom: 8px; }
.syz-article-body a { text-decoration: underline; text-decoration-color: var(--accent-blue-border); text-underline-offset: 2px; }
.syz-article-body figure { margin: 24px 0; }
.syz-article-body figcaption { font-family: var(--font-mono); font-size: 12px; color: var(--text-muted); margin-top: 8px; }

.syz-chapter-nav-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; margin-top: 60px; padding-top: 32px; border-top: 1px solid var(--border-hairline); }
@media (max-width: 640px) { .syz-chapter-nav-grid { grid-template-columns: 1fr; } }
.syz-nav-card { background: #FFFFFF; border: 1px solid var(--border-hairline); border-radius: var(--radius-md); padding: 16px 20px; text-decoration: none; transition: all 0.15s; display: block; }
.syz-nav-card:hover { border-color: var(--accent-blue); background: var(--accent-blue-light); }
.syz-nav-card-label { font-family: var(--font-mono); font-size: 11px; color: var(--text-muted); text-transform: uppercase; margin-bottom: 4px; }
.syz-nav-card-title { font-family: var(--font-heading); font-size: 14px; font-weight: 700; color: var(--text-main); }

.syz-article-refs { margin-top: 60px; padding-top: 24px; border-top: 1px solid var(--border-hairline); }
.syz-article-refs h3 { font-size: 16px; }
.syz-article-refs ul { font-size: 13px; color: var(--text-muted); list-style: none; margin: 12px 0 0 0; padding: 0; }
.syz-article-refs li { margin-bottom: 8px; }

.syz-author-byline { font-family: var(--font-mono); font-size: 12px; color: var(--text-muted); }