/* Reading surfaces deliberately do not move. Three author-selected article modes. */
.post-shell{max-width:1190px;padding-top:38px}.post-head{padding:32px 0 38px;border-bottom:1px solid var(--rule)}.post-head h1{font-size:clamp(40px,4.1vw,62px);line-height:1.28;letter-spacing:-2px;max-width:930px;font-weight:600;margin:28px 0 20px}.post-head__summary{max-width:760px;font-size:18px;line-height:1.9;color:var(--muted);margin:0 0 26px}.format-label{font-size:12px;padding-left:14px;color:var(--muted)}.author-dot{display:grid;place-items:center;width:28px;height:28px;border-radius:50%;background:var(--coral);color:var(--ink);font-family:var(--display);font-size:15px}.read{display:grid;grid-template-columns:minmax(0,740px) 215px;gap:75px;align-items:start;padding-top:45px}.read-aside{align-self:stretch}.read-aside__inner{position:sticky;top:40px}.reading-label{display:flex;justify-content:space-between;font-size:11px;color:var(--muted);margin-bottom:10px}.reading-bar{height:3px;background:var(--rule);overflow:hidden}.reading-bar span{display:block;height:100%;background:var(--coral);transform:scaleX(0);transform-origin:left}.toc{margin-top:30px}.toc>p{font-size:12px;font-weight:600;margin-bottom:18px}.toc ol{list-style:none;padding:0;margin:0;border-left:1px solid var(--rule)}.toc li{margin:13px 0}.toc a{display:block;text-decoration:none;font-size:12px;color:var(--muted);padding-left:15px;line-height:1.7;border-left:2px solid transparent;margin-left:-1px}.toc a:hover,.toc a[aria-current]{color:var(--ink);border-color:var(--coral)}.toc-h3{padding-left:12px}.toc-h3 a{font-size:11px}.share-button{border:0;border-bottom:1px solid var(--rule);background:none;padding:12px 0;font-size:12px;margin-top:24px}.prose{font-family:var(--zh);font-size:17px;line-height:1.95;min-width:0;overflow-wrap:break-word}.prose>:first-child{margin-top:0}.prose p{margin:1.4em 0}.prose h2{font-size:28px;line-height:1.4;letter-spacing:-.7px;font-weight:600;margin:2.5em 0 .9em;scroll-margin-top:36px}.prose h3{font-size:21px;line-height:1.5;font-weight:600;margin:2em 0 .8em;scroll-margin-top:36px}.prose h4{font-size:18px}.prose strong{font-weight:600}.prose a{color:inherit;text-decoration-color:var(--coral);text-decoration-thickness:2px;text-underline-offset:4px}.prose a:hover{color:var(--coral)}.prose ul,.prose ol{padding-left:1.5em}.prose li{margin:.6em 0}.prose li::marker{color:var(--muted)}.prose blockquote{margin:35px 0;padding:10px 0 10px 28px;border-left:3px solid var(--coral);font-size:21px;line-height:1.85;letter-spacing:-.5px}.prose blockquote p{margin:.5em 0}.prose hr{margin:45px 0;border:0;border-top:1px solid var(--rule)}.prose :not(pre)>code{padding:.16em .35em;background:#17181d09;border-radius:4px;font-family:var(--mono);font-size:.83em;word-break:break-word}.code-block{border:1px solid var(--rule);border-radius:7px;overflow:hidden;margin:30px 0;background:var(--card)}.code-block__head{display:flex;justify-content:space-between;padding:10px 18px;border-bottom:1px solid var(--rule);font:11px var(--mono);color:var(--muted);align-items:center}.code-block__head button{border:0;background:none;font-size:11px;color:var(--muted);padding:5px;cursor:pointer}.prose pre{margin:0!important;padding:22px;overflow-x:auto;background:var(--card)!important;line-height:1.7}.prose pre code{font:13px/1.7 var(--mono)}.prose .table-wrap{overflow-x:auto;margin:30px 0;border:1px solid var(--rule);border-radius:6px}.prose table{border-collapse:collapse;width:100%;font-size:14px;line-height:1.75}.prose th,.prose td{padding:14px 18px;border-bottom:1px solid var(--rule);min-width:130px;vertical-align:top}.prose th{background:#ffd43b40;font-weight:600}.prose tr:last-child td{border-bottom:0}.prose tr:nth-child(even){background:#17181d03}.prose img{display:block;border-radius:6px;margin:28px 0 10px;max-height:650px;object-fit:contain}.prose em{font-style:italic}.prose p:has(>img)+p:has(>em:only-child){font-size:12px;color:var(--muted);text-align:center;margin-top:8px}.callout{padding:20px 24px;margin:30px 0;background:#54b3b515;border-radius:6px;font-size:15px;border:1px solid #54b3b540}.callout__title{display:block;font-size:13px;font-weight:600;line-height:1.7}.callout p{margin:.7em 0 0}.callout--tip{background:#b9ed6325;border-color:#b9ed6390}.callout--warning{background:#ffd43b25;border-color:#ffd43b90}.callout--takeaway{background:var(--ink);color:var(--paper);border-color:var(--ink)}.callout--details{background:var(--card);border-color:var(--rule)}summary.callout__title{cursor:pointer;display:list-item;list-style:disclosure-closed;margin-left:14px}details[open]>summary{list-style:disclosure-open}.prose-columns{display:grid;grid-template-columns:1fr 1fr;gap:24px;margin:35px 0}.prose-columns>blockquote{font-size:15px;margin:0;padding:18px;background:var(--card);border:1px solid var(--rule);border-radius:5px}.prose .task-list-item{list-style:none}.prose .contains-task-list{padding-left:.25em}.prose input[type=checkbox]{accent-color:var(--coral);margin-right:10px}.prose .footnotes{font-size:13px;color:var(--muted);margin-top:55px;border-top:1px solid var(--rule);padding-top:20px}.prose .katex-display{overflow-x:auto;overflow-y:hidden;padding:15px 0}.article--essay .prose>p:first-child{font-size:20px;line-height:1.85}.article--guide .prose{counter-reset:chapter}.article--guide .prose>h2{counter-increment:chapter;display:flex;gap:18px}.article--guide .prose>h2::before{content:counter(chapter,decimal-leading-zero);font:14px var(--display);background:var(--acid);border-radius:50%;width:34px;height:34px;flex-shrink:0;display:grid;place-items:center;margin-top:3px}.article--notes .prose{background:repeating-linear-gradient(transparent,transparent 32px,#17181d05 32px,#17181d05 33px);padding:24px 28px;border-left:2px solid var(--brand-mint)}.article--notes .post-head{border-bottom:3px solid var(--brand-mint)}.post-foot{max-width:740px;margin:65px 0 20px;padding-top:25px;border-top:1px solid var(--rule)}.post-foot>p{font-size:14px;color:var(--muted)}.related{display:grid;grid-template-columns:1fr 1fr;gap:20px;margin-top:40px}.related a{padding:20px;border:1px solid var(--rule);border-radius:6px;text-decoration:none}.related a:hover{background:var(--acid)}.related span{font-size:11px;color:var(--muted)}.related h2{font-size:18px;line-height:1.6;font-weight:500}.about{padding-top:75px}.about h1{font-size:clamp(48px,5.5vw,80px);line-height:1.35;letter-spacing:-3px;margin:30px 0 55px;font-weight:500}.about h1 span{color:var(--coral)}.about .prose{max-width:720px}.about-lede{font-size:25px}

/* Article-local teaching embeds: isolated scripts, never arbitrary HTML. */
.prose .live-demo{margin:30px 0;border:2px solid var(--ink);border-radius:14px;overflow:hidden;background:var(--paper);box-shadow:3px 3px 0 var(--ink)}
.live-demo>figcaption{font:600 14px/1.65 var(--zh);padding:14px 18px;border-bottom:2px solid var(--ink);background:var(--sun)}
.live-demo>iframe{display:block;width:100%;height:430px;border:0;background:var(--paper)}
.prose .live-demo__fallback{font-size:11px;margin:0;padding:9px 15px;border-top:1px solid var(--rule);color:var(--muted);background:var(--card)}