:root{--bg:#ffffff;--fg:#1a202c;--muted:#5a6572;--border:#e2e8f0;--accent:#2b6cb0;--accent-soft:#ebf2fb;--code-bg:#f5f7fa;--sidebar-bg:#fafbfc;color-scheme:light dark}
@media (prefers-color-scheme:dark){:root{--bg:#0f141a;--fg:#e6edf3;--muted:#9aa7b4;--border:#232c36;--accent:#6ba5e0;--accent-soft:#16202c;--code-bg:#161c23;--sidebar-bg:#111820}}
*{box-sizing:border-box}
[hidden]{display:none!important}
html{scroll-behavior:smooth}
body{margin:0;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;color:var(--fg);background:var(--bg);line-height:1.6}
a{color:var(--accent);text-decoration:none}
a:hover{text-decoration:underline}
a:focus-visible,button:focus-visible,input:focus-visible,select:focus-visible,summary:focus-visible{outline:3px solid var(--accent);outline-offset:2px}
.topbar{display:flex;flex-wrap:wrap;align-items:center;gap:1rem;padding:.75rem 1.5rem;border-bottom:1px solid var(--border);position:sticky;top:0;background:var(--bg);z-index:10}
.topbar .brand{font-weight:700;font-family:ui-monospace,SFMono-Regular,Menlo,monospace;color:var(--fg)}
.topbar-links{display:flex;flex-wrap:wrap;gap:1rem;margin-left:auto;font-size:.92rem}
.version-menu{position:relative}
.version-menu summary{cursor:pointer;color:var(--accent)}
.version-menu ul{position:absolute;right:0;max-height:55vh;min-width:20rem;overflow:auto;margin:.4rem 0 0;padding:.5rem;list-style:none;border:1px solid var(--border);border-radius:8px;background:var(--bg);box-shadow:0 6px 20px #0003}
.version-menu li{padding:.1rem .25rem;white-space:nowrap}
.version-menu p{margin:.35rem 0 0;font-size:.8rem}
.layout{display:flex;gap:2rem;max-width:1200px;margin:0 auto;padding:0 1.5rem;align-items:flex-start}
.page-gallery .layout{max-width:1400px}
.sidebar{flex:0 0 250px;position:sticky;top:64px;max-height:calc(100vh - 64px);overflow-y:auto;padding:1.5rem 0;font-size:.9rem}
.sidebar .nav-group{font-weight:700;text-transform:uppercase;letter-spacing:.03em;font-size:.72rem;color:var(--muted);margin:1.2rem 0 .35rem}
.sidebar ul{list-style:none;margin:0;padding:0}
.sidebar li{margin:.1rem 0}
.sidebar li a{display:block;padding:.2rem .5rem;border-radius:5px;color:var(--fg)}
.sidebar li a:hover{background:var(--accent-soft);text-decoration:none}
.sidebar li.active a{background:var(--accent-soft);color:var(--accent);font-weight:600}
.content{flex:1 1 auto;min-width:0;padding:1.5rem 0 3rem;max-width:100%}
.content h1{font-size:2rem;line-height:1.2;margin-top:.5rem}
.content h2{margin-top:2rem;padding-bottom:.3rem;border-bottom:1px solid var(--border)}
.content img{max-width:100%;height:auto}
.content pre{background:var(--code-bg);border:1px solid var(--border);border-radius:8px;padding:1rem;overflow-x:auto;font-size:.88rem}
.content code{background:var(--code-bg);padding:.15em .4em;border-radius:4px;font-size:.88em;font-family:ui-monospace,SFMono-Regular,Menlo,monospace}
.content pre code{background:none;padding:0;font-size:1em}
.content table{border-collapse:collapse;display:block;overflow-x:auto;max-width:100%;margin:1rem 0}
.content th,.content td{border:1px solid var(--border);padding:.45rem .7rem;text-align:left}
.content th{background:var(--sidebar-bg)}
.content blockquote{margin:1rem 0;padding:.4rem 1rem;border-left:4px solid var(--accent);background:var(--accent-soft);border-radius:0 6px 6px 0}
.content blockquote p{margin:.4rem 0}
.hero{padding:2.5rem 0 1rem}
.hero h1{font-size:2.4rem;margin:0 0 .5rem}
.hero .tagline{font-size:1.15rem;color:var(--muted);max-width:60ch}
.cta{display:inline-block;margin:.4rem .6rem .4rem 0;padding:.55rem 1.1rem;border-radius:8px;background:var(--accent);color:#fff;font-weight:600}
.cta:hover{text-decoration:none;opacity:.92}
.cta.secondary{background:transparent;color:var(--accent);border:1px solid var(--accent)}
.gallery-provenance{margin:1rem 0;border:1px solid var(--border);border-radius:8px;padding:.6rem .8rem;background:var(--sidebar-bg)}
.gallery-provenance summary,.demo-card-details summary{cursor:pointer;font-weight:700;color:var(--accent)}
.gallery-provenance .demo-facts{margin:.75rem 0 .25rem}
.gallery-qualification-note{color:var(--muted);font-size:.9rem}
.gallery-controls{display:flex;flex-wrap:wrap;align-items:end;gap:.8rem;margin:1.25rem 0;padding:1rem;border:1px solid var(--border);border-radius:10px;background:var(--sidebar-bg)}
.gallery-control{display:flex;flex:1 1 200px;flex-direction:column;gap:.25rem}
.gallery-control label{font-size:.82rem;font-weight:700}
.gallery-control input,.gallery-control select,.gallery-controls button{min-height:2.6rem;border:1px solid var(--border);border-radius:6px;padding:.45rem .65rem;color:var(--fg);background:var(--bg);font:inherit}
.gallery-controls button{cursor:pointer;color:var(--accent);font-weight:600}
.gallery-controls button:disabled{cursor:default;color:var(--muted);opacity:.65}
.gallery-results{color:var(--muted)}
.gallery-empty{padding:1rem;border:1px dashed var(--border);border-radius:8px;color:var(--muted)}
.demo-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(min(100%,320px),1fr));gap:1rem;margin:1rem 0}
.demo-card{border:1px solid var(--border);border-radius:10px;padding:1.1rem 1.2rem;background:var(--sidebar-bg);display:flex;flex-direction:column}
.demo-card--merge,.demo-card--replace,.demo-card--retire{border-inline-start:4px solid var(--accent)}
.demo-card-header{display:flex;flex-wrap:wrap;align-items:flex-start;justify-content:space-between;gap:.5rem}
.demo-card h3{margin:.1rem 0 .25rem}
.demo-badges{display:flex;flex-wrap:wrap;gap:.35rem}
.demo-badge{border:1px solid var(--border);border-radius:999px;padding:.1rem .5rem;background:var(--accent-soft);font-size:.75rem;font-weight:700}
.demo-badge--lifecycle{text-transform:uppercase;letter-spacing:.02em}
.demo-card p{color:var(--muted);margin:0 0 .8rem}
.demo-card .demo-id{flex:0 0 auto}
.demo-card .demo-summary{color:var(--fg)}
.demo-facts{display:grid;grid-template-columns:minmax(7.5rem,auto) 1fr;gap:.5rem .75rem;margin:.25rem 0 1rem;font-size:.86rem}
.demo-facts--essential{gap:.35rem .65rem;margin-bottom:.7rem}
.demo-facts dt{font-weight:700;color:var(--muted)}
.demo-facts dd{min-width:0;margin:0;overflow-wrap:anywhere}
.demo-evidence-line{display:block}
.demo-evidence-expiry{white-space:normal}
.demo-tags{display:flex;flex-wrap:wrap;gap:.3rem;margin:0;padding:0;list-style:none}
.demo-tags code{white-space:nowrap}
.demo-none{color:var(--muted)}
.demo-link{margin:.1rem 0 .75rem;font-weight:600}
.demo-card-details{border-top:1px solid var(--border);padding-top:.55rem}
.demo-card-details .demo-facts{margin:.75rem 0 .2rem}
.site-footer{border-top:1px solid var(--border);margin-top:2rem;padding:1.5rem;text-align:center;color:var(--muted);font-size:.85rem}
@media (max-width:820px){.layout{flex-direction:column;padding:0 1rem}.sidebar{position:static;flex-basis:auto;max-height:none;width:100%;border-bottom:1px solid var(--border)}}
@media (max-width:520px){.demo-facts{grid-template-columns:1fr}.demo-facts dd{margin-bottom:.35rem}}