/* Scoped to the chronology; the site's existing theme tokens own its colors. */
.bt-timeline {max-width:76ch;margin-inline:auto;min-width:0}
.bt-timeline .article-head {padding-block:2rem;margin-bottom:2rem}
.bt-timeline .article-head h1 {max-width:28ch;font-size:clamp(2rem,4.4vw,3.4rem);line-height:1.12}
.bt-timeline .timeline-eyebrow,.bt-timeline .timeline-scope {color:var(--dim)}
.bt-timeline .lede {font-size:1.18rem;line-height:1.6}
.bt-timeline p,.bt-timeline li {overflow-wrap:anywhere}
.bt-timeline .vendor-pattern-intro {margin-block:1.5rem;padding-block:1rem;border-block:1px solid var(--rule)}
.bt-timeline .vendor-case-links {line-height:2}
.bt-timeline a {text-decoration:underline;text-underline-offset:3px}
.bt-timeline :focus-visible {outline:3px solid var(--ink);outline-offset:4px}
.bt-timeline .timeline-filters,.bt-timeline .timeline-years {display:flex;flex-wrap:wrap;gap:.5rem;margin-block:1.2rem}
.bt-timeline [hidden] {display:none!important}
.bt-timeline .timeline-filters button,.bt-timeline .timeline-years a {display:inline-flex;align-items:center;justify-content:center;min-height:44px;padding:.45rem .75rem;border:1px solid var(--rule);background:var(--bg);color:var(--ink);font:inherit;font-size:.95rem;cursor:pointer}
.bt-timeline .timeline-filters button[aria-pressed="true"] {background:var(--ink);color:var(--bg)}
.bt-timeline .timeline-result {color:var(--dim);min-height:1.6em}
.bt-timeline .timeline-year {scroll-margin-top:6rem;margin-block:2.6rem}
.bt-timeline .timeline-year h2 {font-size:1.7rem;margin-bottom:1rem;border-bottom:2px solid var(--ink);padding-bottom:.5rem}
.bt-timeline .utah-events {list-style:none;padding:0;margin:0}
.bt-timeline .utah-events>li {margin:0;border-bottom:1px solid var(--rule)}
.bt-timeline .utah-event {border:0;padding:0;margin:0;scroll-margin-top:6rem}
.bt-timeline .utah-event>summary {cursor:pointer;padding:1.35rem 0;list-style-position:outside;margin-left:1.1rem}
.bt-timeline .utah-event time {font-size:.95rem;color:var(--dim);font-variant-numeric:tabular-nums}
.bt-timeline .utah-event h3 {font-size:1.3rem;line-height:1.35;margin:.3rem 0 .65rem}
.bt-timeline .utah-event-description,.bt-timeline .utah-event-tags,.bt-timeline .utah-event-cue {display:block}
.bt-timeline .utah-event-description {line-height:1.6}
.bt-timeline .utah-event-tags {font-size:.875rem;color:var(--dim);margin-top:.75rem}
.bt-timeline .utah-event-cue {font-size:.95rem;text-decoration:underline;margin-top:.65rem}
.bt-timeline .utah-evidence {margin-left:1.1rem;padding:0 0 1.5rem;max-width:70ch}
.bt-timeline .utah-evidence h4 {font-size:1.05rem;margin:1.2rem 0 .4rem}
.bt-timeline .utah-evidence p {margin-block:.4rem 1rem}
.bt-timeline .utah-sources {padding-left:1.2rem}
.bt-timeline .utah-sources li {margin-block:.5rem}
.bt-timeline .timeline-source-note,.bt-timeline .reader-records,.bt-timeline .vendor-captures {margin-block:3rem;padding-top:1rem;border-top:2px solid var(--ink)}
.bt-timeline .reader-records h2,.bt-timeline .timeline-source-note h2,.bt-timeline .vendor-captures h2 {font-size:1.6rem;line-height:1.3}
.bt-timeline .reader-records li {margin-block:1rem}
.bt-timeline .vendor-captures-grid {display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:1.2rem}
.bt-timeline .vendor-captures figure {min-width:0;margin:0}
.bt-timeline .vendor-captures img {display:block;width:100%;height:160px;max-height:220px;object-fit:contain;object-position:top;border:1px solid var(--rule)}
.bt-timeline .vendor-captures figcaption {font-size:.875rem;line-height:1.5;margin-top:.6rem}
@media(max-width:650px){.bt-timeline .vendor-captures-grid{grid-template-columns:1fr}.bt-timeline .vendor-captures img{width:100%;height:180px}.bt-timeline .timeline-filters button{font-size:.875rem;padding-inline:.6rem}}
@media print{.bt-timeline .timeline-filters,.bt-timeline .timeline-result{display:none}.bt-timeline .utah-event>summary{break-after:avoid}.bt-timeline .utah-evidence{display:block!important}}