.ba-callout{background:var(--chip-bg);border:1px solid var(--chip-border);border-left:3px solid var(--accent);color:var(--text);border-radius:12px;margin:0 0 30px;padding:16px 20px;font-size:16px;font-weight:500;line-height:1.6}.ba-callout p{margin:0}.ba-faq{margin-top:40px}.ba-faq-eyebrow{letter-spacing:-.02em;color:var(--text);margin-bottom:16px;font-size:clamp(20px,2.6vw,26px);font-weight:700}.ba-faq-card{background:var(--chip-bg);border:1px solid var(--chip-border);border-radius:16px;padding:6px 24px}.ba-faq-item{padding:20px 0}.ba-faq-q{color:var(--text);margin:0 0 6px;font-size:16px;font-weight:600}.ba-faq-a{color:var(--text-muted);margin:0;font-size:14.5px;line-height:1.65}.ba-progress-track{z-index:200;background:0 0;width:100%;height:3px;position:fixed;top:0;left:0}.ba-progress-fill{background:var(--accent);transform-origin:0;width:100%;height:100%;transform:scaleX(0)}.ba-cover{aspect-ratio:21/7;border:1px solid var(--hairline);border-radius:22px;max-width:1060px;margin:0 auto clamp(28px,4vw,44px);overflow:hidden}@media (max-width:700px){.ba-cover{aspect-ratio:16/10}}.ba-grid{grid-template-columns:236px 1fr;align-items:start;gap:clamp(32px,5vw,76px);max-width:1060px;margin:0 auto;display:grid}.ba-toc{position:sticky;top:96px}.ba-toc-label{text-transform:uppercase;letter-spacing:.12em;color:var(--accent);margin-bottom:18px;font-size:11px;font-weight:700}.ba-toc-list{margin:0;padding:0;list-style:none}.ba-link{border-left:2px solid var(--hairline);color:var(--text-muted);padding:7px 0 7px 16px;font-size:13.5px;line-height:1.4;text-decoration:none;transition:color .2s,border-color .2s;display:block}.ba-link:hover{color:var(--text)}.ba-link.is-active{color:var(--text);border-left-color:var(--accent);font-weight:600}.ba-body{min-width:0;max-width:680px}.ba-eyebrow{text-transform:uppercase;letter-spacing:.12em;color:var(--accent);margin-bottom:14px;font-size:12px;font-weight:700}.ba-h1{letter-spacing:-.03em;margin-bottom:14px;font-size:clamp(30px,4.5vw,48px);font-weight:800;line-height:1.08}.ba-meta{color:var(--text-faint);margin-bottom:20px;font-size:13px}.ba-summary{color:var(--text);letter-spacing:-.01em;border-bottom:1px solid var(--hairline);margin:0 0 30px;padding-bottom:26px;font-size:clamp(16px,1.8vw,19px);font-weight:500;line-height:1.6}.ba-prose{color:var(--text-muted);counter-reset:ba-section;font-size:16px;line-height:1.8}.ba-prose h2{letter-spacing:-.02em;color:var(--text);align-items:baseline;gap:12px;margin:46px 0 14px;scroll-margin-top:96px;font-size:clamp(20px,2.6vw,26px);font-weight:700;display:flex}.ba-prose h2:before{counter-increment:ba-section;content:counter(ba-section, decimal-leading-zero);color:var(--accent);letter-spacing:0;font-size:14px;font-weight:800}.ba-prose p:first-of-type{font-size:1.05em}.ba-prose h3{color:var(--text);margin:30px 0 10px;scroll-margin-top:96px;font-size:18px;font-weight:700}.ba-prose p{margin:0 0 16px}.ba-prose a{color:var(--accent);text-underline-offset:2px;text-decoration:underline}.ba-prose ul,.ba-prose ol{margin:0 0 16px;padding-left:22px}.ba-prose li{margin-bottom:8px}.ba-prose strong{color:var(--text);font-weight:700}.ba-prose blockquote{border-left:3px solid var(--accent);color:var(--text);margin:24px 0;padding:4px 0 4px 18px;font-style:italic}.ba-prose code{background:var(--chip-bg);border:1px solid var(--chip-border);border-radius:5px;padding:2px 6px;font-size:.9em}.ba-prose pre{background:var(--bg-elev);border:1px solid var(--hairline);border-radius:12px;margin:0 0 20px;padding:16px 18px;overflow-x:auto}.ba-prose pre code{background:0 0;border:none;padding:0}.ba-prose img{border-radius:14px;max-width:100%;margin:24px 0;display:block}.ba-prose hr{border:none;border-top:1px solid var(--hairline);margin:32px 0}.ba-prose table{border-collapse:collapse;width:100%;margin:0 0 20px;font-size:14.5px}.ba-prose th,.ba-prose td{text-align:left;border-bottom:1px solid var(--hairline);padding:10px 12px}.ba-prose th{color:var(--text);font-weight:700}@media (max-width:900px){.ba-grid{grid-template-columns:1fr;gap:4px}.ba-toc{border:1px solid var(--hairline);background:var(--bg-elev);border-radius:16px;margin-bottom:24px;padding:18px 20px;position:static}.ba-toc-list{columns:2;column-gap:22px}.ba-link{border-left:none;padding:6px 0}.ba-link.is-active{border-left:none}.ba-body{max-width:100%}}