.site-header { position: sticky; top: 0; z-index: 100; border-bottom: 1px solid rgba(217,204,191,.82); background: rgba(245,240,232,.94); backdrop-filter: blur(12px); }
.site-nav { min-height: 68px; display: flex; align-items: center; justify-content: space-between; gap: var(--spacing-sm); }
.site-brand { display: inline-flex; align-items: center; gap: 10px; color: var(--ink); font-weight: 700; }
.site-brand:hover { color: var(--ink); }
.site-links { display: flex; align-items: center; gap: var(--spacing-sm); flex-wrap: wrap; }
.site-links a { color: var(--ink-muted); font-size: .9375rem; font-weight: 600; }
.site-links a[aria-current='page'], .site-links a:hover { color: var(--accent); }
.guide-main { position: relative; z-index: 1; }
.guide-container { width: min(100% - 32px,1080px); margin: 0 auto; }
.article-container { width: min(100% - 32px,820px); margin: 0 auto; }
.breadcrumb { padding: 22px 0 0; color: var(--ink-muted); font-size: .875rem; }
.breadcrumb ol { display: flex; flex-wrap: wrap; gap: 8px; list-style: none; margin: 0; padding: 0; }
.breadcrumb li { margin: 0; }
.breadcrumb li:not(:last-child)::after { content: '/'; margin-left: 8px; color: var(--border); }
.guide-hero,.article-hero { padding: 56px 0 40px; }
.eyebrow { margin-bottom: 10px; color: var(--accent); font-size: .875rem; font-weight: 700; letter-spacing: .08em; text-transform: uppercase; }
.guide-hero h1,.article-hero h1 { max-width: 900px; margin-bottom: 18px; font-size: clamp(2rem,4vw,3.25rem); line-height: 1.24; }
.article-lead,.guide-lead { max-width: 760px; margin-bottom: 0; color: var(--ink-muted); font-size: 1.0625rem; line-height: 1.9; }
.article-meta { display: flex; flex-wrap: wrap; gap: 10px 18px; margin-top: 20px; color: var(--ink-muted); font-size: .875rem; }
.guide-section { padding: 28px 0 64px; }
.guide-grid { display: grid; grid-template-columns: repeat(2,minmax(0,1fr)); gap: 18px; }
.guide-card { display: block; min-height: 100%; padding: 26px; color: var(--ink); background: var(--card); border: 1px solid var(--border); border-radius: var(--radius-lg); box-shadow: 0 3px 14px var(--shadow); }
.guide-card:hover { color: var(--ink); border-color: var(--accent); transform: translateY(-1px); }
.guide-card .card-kicker { margin-bottom: 8px; color: var(--accent); font-size: .8125rem; font-weight: 700; }
.guide-card h2,.guide-card h3 { margin-bottom: 10px; font-size: 1.25rem; line-height: 1.45; }
.guide-card p { margin: 0; color: var(--ink-muted); font-size: .9375rem; }
.status-label { display: inline-flex; align-items: center; margin-top: 14px; padding: 4px 9px; border-radius: 999px; background: var(--paper-accent); color: var(--ink-muted); font-size: .75rem; font-weight: 700; }
.article-body { padding: 0 0 72px; }
.article-body > * + * { margin-top: 20px; }
.article-body h2 { margin-top: 54px; padding-top: 6px; font-size: 1.75rem; line-height: 1.45; }
.article-body h3 { margin-top: 34px; font-size: 1.25rem; line-height: 1.5; }
.article-body p,.article-body li { font-size: 1rem; line-height: 1.9; }
.article-body ul,.article-body ol { padding-left: 1.4rem; }
.article-body strong { color: var(--ink); }
.answer-box,.formula-card,.note-box,.product-box,.source-box,.related-box,.checklist { padding: 24px; border-radius: var(--radius-lg); }
.answer-box { margin-top: 0; background: var(--card); border: 1px solid var(--border); box-shadow: 0 3px 14px var(--shadow); }
.answer-box h2 { margin: 0 0 12px; padding: 0; font-size: 1.2rem; }
.answer-box ul { margin: 0; }
.formula-card { margin: 28px 0; text-align: center; background: var(--accent-soft); border: 1px solid rgba(201,94,53,.25); }
.formula-label { display: block; margin-bottom: 8px; color: var(--ink-muted); font-size: .8125rem; font-weight: 700; letter-spacing: .05em; }
.formula { font-size: clamp(1.25rem,3vw,1.7rem); font-weight: 700; line-height: 1.5; }
.example-list { display: grid; grid-template-columns: repeat(3,minmax(0,1fr)); gap: 12px; margin: 24px 0; }
.example-item { padding: 18px; text-align: center; background: var(--card); border: 1px solid var(--border); border-radius: var(--radius-md); }
.example-item strong { display: block; margin-bottom: 6px; font-size: 1.2rem; }
.table-wrap { margin: 26px 0; overflow-x: auto; border: 1px solid var(--border); border-radius: var(--radius-md); background: var(--card); }
.article-table { width: 100%; min-width: 620px; border-collapse: collapse; }
.article-table th,.article-table td { padding: 14px 16px; text-align: left; vertical-align: top; border-bottom: 1px solid var(--border); }
.article-table th { background: var(--paper-accent); font-size: .875rem; }
.article-table tr:last-child td { border-bottom: 0; }
.note-box { background: #fff4df; border: 1px solid #e7c98f; }
.note-box strong:first-child { display: block; margin-bottom: 8px; }
.checklist { margin: 26px 0; background: var(--card); border: 1px solid var(--border); }
.checklist ul { margin-bottom: 0; }
.checklist li:last-child { margin-bottom: 0; }
.product-box { margin-top: 54px; background: var(--card); border: 1px solid var(--accent); }
.product-box h2 { margin-top: 0; padding-top: 0; }
.product-box .btn { margin-top: 8px; }
.source-box,.related-box { margin-top: 44px; background: rgba(255,249,241,.62); border: 1px solid var(--border); }
.source-box h2,.related-box h2 { margin-top: 0; padding-top: 0; font-size: 1.25rem; }
.source-box li,.related-box li { font-size: .9375rem; }
.source-box a,.related-box a { overflow-wrap: anywhere; }
.inline-link { font-weight: 700; text-decoration: underline; text-decoration-thickness: 1px; text-underline-offset: 3px; }
.site-footer { padding: 34px 0; border-top: 1px solid var(--border); background: var(--paper-accent); }
.site-footer-inner { display: flex; align-items: center; justify-content: space-between; gap: 18px; flex-wrap: wrap; }
.site-footer-links { display: flex; gap: 16px; flex-wrap: wrap; }
.site-footer a,.site-footer p { margin: 0; color: var(--ink-muted); font-size: .875rem; }
@media (max-width:760px) { .site-nav { min-height: 62px; } .site-links { gap: 12px; } .site-links .secondary-link { display:none; } .guide-container,.article-container { width:min(100% - 28px,820px); } .guide-hero,.article-hero { padding:40px 0 28px; } .guide-grid,.example-list { grid-template-columns:1fr; } .article-body h2 { margin-top:44px; font-size:1.5rem; } .answer-box,.formula-card,.note-box,.product-box,.source-box,.related-box,.checklist { padding:20px; } }