:root{color-scheme:light dark;--text-sm:15px;--text-xs:14px;--bg:oklch(98.5% .005 250);--fg:oklch(24% .02 250);--muted:oklch(44% .02 250);--line:oklch(88% .01 250);--accent:oklch(45% .12 250);--tint:oklch(95% .015 250)}
@media (prefers-color-scheme:dark){:root{--bg:oklch(20% .015 250);--fg:oklch(92% .01 250);--muted:oklch(76% .02 250);--line:oklch(34% .02 250);--accent:oklch(78% .1 250);--tint:oklch(26% .02 250)}}
[hidden]{display:none !important} /* author display rules (e.g. li grid) must not unhide filtered items */
*{box-sizing:border-box}html{scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--fg);font:17px/1.55 system-ui,sans-serif}
a{color:var(--accent)}
.wrap{max-width:1180px;margin:0 auto;padding:32px 16px 96px;display:grid;grid-template-columns:minmax(0,1fr);gap:32px}
header h1{font-size:clamp(28px,5vw,42px);line-height:1.1;margin:0 0 12px}
header p{margin:6px 0;max-width:70ch;color:var(--muted)}
.start{display:inline-block;margin:12px 0;padding:10px 16px;border:1px solid var(--accent);border-radius:6px;text-decoration:none;font-weight:600}
.totop{position:fixed;right:16px;bottom:16px;padding:8px 14px;border-radius:999px;background:var(--fg);color:var(--bg);text-decoration:none;font-size:var(--text-sm)}

/* Home: search, filter, catalog */
.search{display:flex;flex-wrap:wrap;gap:8px;align-items:center}
.search input,.search select,.search button{font:inherit;color:var(--fg);background:var(--bg);border:1px solid var(--line);border-radius:6px;padding:8px 12px}
.search input{flex:1 1 320px;min-width:0}.search select{flex:0 1 auto;max-width:100%}
.search button{cursor:pointer;border-color:var(--accent);color:var(--accent)}.search button:disabled{color:var(--muted);border-color:var(--line);cursor:default}
.search input::placeholder{color:var(--muted);opacity:1}
#status{flex-basis:100%;font-size:var(--text-sm);color:var(--muted);margin:0}
.hit{font-size:var(--text-sm);margin-top:4px;max-width:75ch}.hit:empty{display:none}.hit mark{background:var(--tint);color:inherit;font-weight:600}
nav.toc ol{list-style:none;margin:0 0 12px;padding:0;font-size:15px}
nav.toc li{margin:2px 0}nav.toc li a{display:block;padding:3px 0;text-decoration:none;color:var(--fg)}
nav.toc li a:hover{color:var(--accent)}nav.toc .n{color:var(--muted);font-variant-numeric:tabular-nums;margin-right:6px}
nav.toc p{margin:12px 0 4px;font-size:var(--text-xs);color:var(--muted)}
details summary{cursor:pointer;font-weight:600;padding:10px 0;border-bottom:1px solid var(--line)}
.question{margin:48px 0 0;font-size:clamp(22px,3vw,28px);line-height:1.2}
.question .eyebrow{display:block;font-size:var(--text-xs);font-weight:600;letter-spacing:.08em;text-transform:uppercase;color:var(--muted);margin-bottom:4px}
.qgroup:first-child .question{margin-top:0}
section,.question{scroll-margin-top:16px}
h3.theme{font-size:20px;line-height:1.25;margin:32px 0 8px;padding-bottom:8px;border-bottom:1px solid var(--line);display:flex;gap:12px}
h3.theme .num{color:var(--muted);font-weight:400}
ul.list{list-style:none;margin:0;padding:0}
ul.list li{display:grid;grid-template-columns:2.2em 1fr;gap:4px;padding:12px 0;scroll-margin-top:16px}
ul.list li:target{background:var(--tint)}
li .num{color:var(--muted);font-size:var(--text-sm);padding-top:3px;font-variant-numeric:tabular-nums}
.title{font-weight:600;text-decoration:none}a.title:hover{text-decoration:underline}
.by{color:var(--muted);font-size:15px}
.links{display:flex;flex-wrap:wrap;gap:12px;font-size:var(--text-sm);margin-top:2px}.links a::before{content:"["}.links a::after{content:"]"}
.tag{margin-left:8px;font-size:var(--text-xs);padding:1px 6px;border:1px solid var(--line);border-radius:4px;color:var(--muted);vertical-align:2px}
.note{font-size:var(--text-sm);color:var(--muted);margin-top:4px;max-width:75ch}

/* Reading pages */
.reading{max-width:820px}
.crumbs{font-size:var(--text-sm);color:var(--muted);display:flex;flex-wrap:wrap;gap:4px 8px}
.crumbs a{color:var(--muted)}.crumbs a:hover{color:var(--accent)}
.reading header .eyebrow{font-size:var(--text-xs);font-weight:600;letter-spacing:.08em;text-transform:uppercase;color:var(--muted);margin:0 0 8px}
.reading header .by{font-size:16px}
.reading header .links{font-size:15px;margin-top:12px}
.prose{font-size:18px;line-height:1.65;max-width:70ch;overflow-wrap:break-word}
.prose h1,.prose h2,.prose h3,.prose h4{line-height:1.25;margin:1.6em 0 .5em}
.prose h1{font-size:1.5em}.prose h2{font-size:1.3em}.prose h3{font-size:1.12em}
.prose p{margin:0 0 .9em}
.prose img{max-width:100%;height:auto}
.prose figure{margin:1.5em 0}.prose figcaption{font-size:var(--text-sm);color:var(--muted);margin-top:4px}
.prose pre,.prose code{font-size:.85em;white-space:pre-wrap;overflow-wrap:anywhere}
.prose table{display:block;overflow-x:auto;border-collapse:collapse;font-size:.85em;max-width:100%}
.prose td,.prose th{border:1px solid var(--line);padding:.3em .5em;vertical-align:top}
.prose blockquote{margin:1em 0;padding:.2em 1em;background:var(--tint);border-radius:4px}
.prose .page-label{font-size:var(--text-xs);color:var(--muted);border-top:1px dotted var(--line);padding-top:.8em;margin:2em 0 1em}
.prose .notice{background:var(--tint);border:1px solid var(--line);border-radius:6px;padding:.6em 1em}
.prose .small{font-size:var(--text-sm);color:var(--muted)}
.pager{display:grid;grid-template-columns:1fr 1fr;gap:16px;border-top:1px solid var(--line);padding-top:16px}
.pager a{text-decoration:none;font-size:var(--text-sm);color:var(--muted)}
.pager a span{display:block;font-size:16px;font-weight:600;color:var(--accent)}
.pager a[rel=next]{text-align:right;grid-column:2}

@media (min-width:960px){
  .home{grid-template-columns:260px minmax(0,1fr);column-gap:48px}
  .home header,.home .search{grid-column:2}
  .home aside{grid-row:1/span 3;grid-column:1}
  .home aside details{position:sticky;top:24px;max-height:calc(100vh - 48px);overflow-y:auto}
  .home aside summary{display:none} /* desktop: sidebar always open */
  .home main{grid-column:2}
  .home ~ .totop{display:none}
}