@import url('vendor/pretendard/pretendardvariable-dynamic-subset.css');
@import url('vendor/jetbrains-mono/jetbrains-mono.css');

:root{
 --bg:#f5f7fb;--paper:#fff;--ink:#141a26;--ink2:#2b3445;--muted:#5b6578;--line:#e3e7ef;--soft:#eef2f8;
 --accent:#0b7fc1;--accent2:#6d4fd8;--tint:#e8f3fb;--orange:#e07a2e;--green:#1f9d6a;--bad:#c0392b;--chart:#0b7fc1;
 --grad:linear-gradient(90deg,var(--accent),var(--accent2));
 --radius:16px;--shadow:0 1px 2px #1a24380a,0 8px 28px #1a243810;
 --sans:'Pretendard Variable',Pretendard,-apple-system,'Apple SD Gothic Neo','Malgun Gothic','Noto Sans KR',system-ui,sans-serif;
 --mono:'JetBrains Mono',ui-monospace,'SF Mono',Consolas,monospace;
 color-scheme:light;
}
body.dark{--bg:#0e131c;--paper:#151c28;--ink:#e8edf5;--ink2:#cfd6e2;--muted:#98a3b6;--line:#253043;--soft:#1b2433;--accent:#4fb3f0;--accent2:#a08cf7;--tint:#16293a;--orange:#f39a52;--green:#46c48f;--bad:#ff8a80;--chart:#4fb3f0;--shadow:0 1px 2px #0006,0 8px 28px #0005;color-scheme:dark}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--ink);font:17px/1.85 var(--sans);-webkit-font-smoothing:antialiased;word-break:keep-all;overflow-wrap:anywhere}
a{color:var(--accent);text-decoration:none}a:hover{text-decoration:underline}
button,input,select{font:inherit;color:inherit}
button{cursor:pointer;border:1px solid var(--line);background:var(--paper);border-radius:10px;padding:7px 14px;transition:border-color .15s,background .15s}
button:hover{border-color:var(--accent)}
:focus-visible{outline:3px solid var(--accent2);outline-offset:3px;border-radius:6px}
[hidden]{display:none!important}
.skip{position:fixed;left:12px;top:-60px;z-index:60;background:var(--paper);padding:8px 12px;border-radius:8px}.skip:focus{top:12px}

/* header and sidebar */
header{position:sticky;top:0;z-index:30;height:64px;display:flex;align-items:center;justify-content:space-between;gap:16px;padding:0 28px;background:color-mix(in srgb,var(--bg) 86%,transparent);backdrop-filter:blur(12px);border-bottom:1px solid var(--line)}
.brand{display:flex;align-items:center;gap:12px;color:var(--ink);font-weight:750;font-size:17px;letter-spacing:-.3px;line-height:1.25}.brand:hover{text-decoration:none}
.brand small{display:block;font:500 10px var(--mono);letter-spacing:1.4px;color:var(--muted)}
/* mobile fixes: tables keep words whole and scroll sideways; one-line header */
.prose-table th,.prose-table td{overflow-wrap:normal;word-break:keep-all}
.prose-table .nw{white-space:nowrap}
/* scroll shadows: a soft edge appears on the side that has more table to scroll to */
.table-wrap{background:linear-gradient(to right,var(--paper) 30%,transparent) left/40px 100% no-repeat local,linear-gradient(to left,var(--paper) 30%,transparent) right/40px 100% no-repeat local,radial-gradient(farthest-side at 0 50%,#0002,transparent) left/14px 100% no-repeat scroll,radial-gradient(farthest-side at 100% 50%,#0002,transparent) right/14px 100% no-repeat scroll;background-color:var(--paper)}
.prose-table{background:transparent}
.table-wrap{-webkit-overflow-scrolling:touch;position:relative}  /* keeps KaTeX hidden MathML inside the scroller */
header{-webkit-backdrop-filter:blur(12px)}
.brand{min-width:0}.brand>span:last-child{min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.header-right button{white-space:nowrap}
@media(max-width:600px){
 header{gap:10px}.brand{font-size:15px;gap:9px}.brand-icon{width:32px;height:32px;font-size:17px;flex:none}
 .header-right{gap:6px}.header-right button{padding:6px 10px;font-size:13px}#theme{padding:6px 9px}
 .prose-table{font-size:13.5px;min-width:calc(var(--cols,3)*7.5em)}.prose-table th,.prose-table td{padding:8px 10px}
}
.brand-icon{width:36px;height:36px;border-radius:10px;background:var(--grad);color:#fff;display:grid;place-items:center;font-size:20px}
.header-right{display:flex;gap:8px}#theme{border-radius:10px}#theme span{font-size:13px;margin-left:4px}#menu{display:none}
.layout{display:grid;grid-template-columns:288px minmax(0,1fr);max-width:1480px;margin:0 auto}
#sidebar{position:sticky;top:64px;height:calc(100vh - 64px);overflow:auto;padding:28px 18px 28px 28px;border-right:1px solid var(--line)}
.book-label{font:600 10px var(--mono);letter-spacing:2px;color:var(--accent)}
#sidebar h2{font-size:19px;letter-spacing:-.4px;margin:6px 0 2px}.sidebar-intro{font-size:13px;color:var(--muted);line-height:1.7;margin:0 0 18px}
.search-label{display:block;font-size:11px;color:var(--muted);margin-bottom:4px}
#search{width:100%;border:1px solid var(--line);background:var(--paper);border-radius:10px;padding:9px 12px;font-size:14px;margin-bottom:14px}
.nav-part{font:600 10px var(--mono);letter-spacing:1.2px;color:var(--muted);margin:18px 0 6px;text-transform:uppercase}.nav-part:first-child{margin-top:0}
.chapter-link{display:flex;gap:10px;align-items:baseline;padding:7px 10px;margin:1px -10px;border-radius:9px;color:var(--ink2);font-size:14px;line-height:1.5}
.chapter-link span{font:500 11px var(--mono);color:var(--muted);min-width:20px}
.chapter-link:hover{background:var(--soft);text-decoration:none}
.chapter-link[aria-current=page]{background:var(--tint);color:var(--accent);font-weight:650}.chapter-link[aria-current=page] span{color:var(--accent)}
.chapter-link.planned-link{opacity:.5}
.reading-progress{margin-top:22px;padding-top:16px;border-top:1px solid var(--line);font-size:12px;color:var(--muted)}.reading-progress span{display:flex;justify-content:space-between}
progress{width:100%;height:6px;border:0;border-radius:6px;overflow:hidden;background:var(--line);accent-color:var(--accent)}progress::-webkit-progress-bar{background:var(--line)}progress::-webkit-progress-value{background:var(--grad)}
.reading-progress small{font-size:11px}.progress-reset{border:0;background:none;padding:0;font-size:11px;color:var(--muted);text-decoration:underline}
.scope-note{margin-top:18px;font-size:12px;color:var(--muted)}.status-dot{display:inline-block;width:7px;height:7px;border-radius:50%;background:var(--green);margin-right:6px}

/* chapter */
main{min-width:0;padding:44px clamp(20px,4vw,64px) 40px}
.chapter{max-width:860px;margin:0 auto}
.eyebrow{font:650 12px var(--sans);letter-spacing:1.2px;color:var(--accent);text-transform:uppercase}
.chapter h1{font-size:clamp(32px,4vw,44px);line-height:1.2;letter-spacing:-1.4px;font-weight:800;margin:10px 0 14px}
.lead{font-size:19px;line-height:1.8;color:var(--muted);margin:0 0 22px}
.chapter-meta{display:flex;flex-wrap:wrap;align-items:center;gap:8px 14px;margin:0 0 26px;font-size:13px}
.concepts{display:flex;flex-wrap:wrap;gap:6px}.concept{font:500 11px var(--mono);background:var(--soft);color:var(--muted);padding:3px 9px;border-radius:999px;border:1px solid var(--line)}
.chapter-meta a{margin-left:auto}
.goals{background:var(--paper);border:1px solid var(--line);border-radius:var(--radius);padding:18px 24px;margin:0 0 34px;box-shadow:var(--shadow)}
.goals .eyebrow{font:700 13px var(--sans);color:var(--accent);letter-spacing:0;text-transform:none}
.prose .goals ul{list-style:none;padding:0;margin:8px 0 0}.goals li{position:relative;padding-left:22px;margin:6px 0;font-size:15.5px;line-height:1.7}
.goals li::before{content:'';position:absolute;left:2px;top:.62em;width:9px;height:9px;border-radius:3px;background:var(--grad)}
.prose h2{font-size:26px;letter-spacing:-.6px;line-height:1.35;margin:52px 0 14px;display:flex;gap:12px;align-items:baseline}
.prose h2 .num{font:600 15px var(--mono);color:var(--accent)}
.prose p{margin:0 0 18px;color:var(--ink2)}.prose strong{color:var(--ink);font-weight:700}
.prose .term{color:var(--accent);font-weight:650}
.prose ul{padding-left:22px;margin:0 0 18px}.prose li{margin:6px 0;color:var(--ink2)}
.prose code{font:14px var(--mono);background:var(--soft);padding:1px 6px;border-radius:5px}
.eq{background:var(--paper);border:1px solid var(--line);border-radius:12px;padding:14px 18px;margin:6px 0 22px;overflow-x:auto;text-align:center}
.katex{font-size:1.08em}.eq .katex-display{margin:0}
.callout{border-radius:12px;padding:14px 18px;margin:0 0 22px;background:var(--tint);border-left:4px solid var(--accent)}
.callout p{margin:0!important;font-size:15.5px}
.callout.warn{background:color-mix(in srgb,var(--orange) 10%,var(--paper));border-left-color:var(--orange)}
details.deep{border:1px solid var(--line);border-radius:12px;background:var(--paper);margin:0 0 22px}
details.deep summary{cursor:pointer;list-style:none;padding:12px 18px;font-weight:650;font-size:15px;display:flex;gap:10px;align-items:center}
details.deep summary::-webkit-details-marker{display:none}
details.deep summary::before{content:'더 깊이';font:600 10px var(--mono);letter-spacing:1px;color:#fff;background:var(--grad);padding:3px 8px;border-radius:999px}
details.deep summary::after{content:'＋';margin-left:auto;color:var(--muted)}details.deep[open] summary::after{content:'－'}
details.deep>div{padding:2px 18px 6px;border-top:1px solid var(--line)}details.deep p,details.deep li{font-size:15.5px}
.table-wrap{overflow-x:auto;margin:0 0 22px;border:1px solid var(--line);border-radius:12px;background:var(--paper)}
.prose-table{width:100%;border-collapse:collapse;font-size:14.5px}.prose-table th,.prose-table td{padding:10px 14px;text-align:left;border-bottom:1px solid var(--line);vertical-align:top}
.prose-table th{font-size:12.5px;color:var(--muted);font-weight:650;background:var(--soft)}.prose-table tr:last-child td{border-bottom:0}
.summary{background:var(--paper);border:1px solid var(--line);border-radius:var(--radius);padding:6px 24px 10px;margin:46px 0 0;box-shadow:var(--shadow)}
.summary h2{margin:14px 0 4px!important;font-size:20px!important}.summary li{font-size:15.5px}

/* simulator card */
.lab{background:var(--paper);border:1px solid var(--line);border-radius:20px;box-shadow:var(--shadow);margin:8px 0 34px;overflow:hidden}
.lab-heading{display:flex;justify-content:space-between;align-items:center;gap:12px;padding:12px 20px;border-bottom:1px solid var(--line);background:linear-gradient(180deg,var(--soft),var(--paper))}
.lab-label{font:600 10px var(--mono);letter-spacing:1.6px;color:var(--accent);border:1px solid var(--accent);border-radius:999px;padding:3px 10px}
.reset{border:0;background:none;font-size:12px;color:var(--muted);padding:2px}
.lab-content{padding:20px 22px 22px}.lab h2{font-size:20px;letter-spacing:-.4px;margin:0 0 4px;line-height:1.4}
.lab-intro{font-size:14px;color:var(--muted);margin:0 0 16px;line-height:1.7}
.lab-disclaimer{font-size:11px;color:var(--muted);border-top:1px solid var(--line);margin:0;padding:9px 20px}
.experiment{display:grid;grid-template-columns:minmax(0,1fr) 240px;gap:22px;align-items:start}
.chart-box{background:var(--bg);border:1px solid var(--line);border-radius:14px;padding:12px;min-width:0}
.chart-box svg,.view svg{display:block;width:100%;height:auto}
.chart-caption{font-size:12px;color:var(--muted);margin:8px 2px 0;line-height:1.6}
.chart-axis{stroke:var(--line)}.chart-text{fill:var(--muted);font:11px var(--mono)}
.chart-line{fill:none;stroke:var(--chart);stroke-width:2.6}.chart-alt{fill:none;stroke:var(--orange);stroke-width:2;stroke-dasharray:6 5}.chart-alt2{fill:none;stroke:var(--accent2);stroke-width:2;stroke-dasharray:2 4}.chart-fill{fill:var(--tint)}
.controls label{display:block;font-size:13px;color:var(--muted);margin:0 0 14px}
.controls label>span{display:flex;justify-content:space-between;gap:8px}.controls output{font:600 13px var(--mono);color:var(--ink)}
input[type=range]{width:100%;margin:8px 0 0;accent-color:var(--accent);cursor:pointer}
select{width:100%;border:1px solid var(--line);background:var(--paper);border-radius:9px;padding:7px 9px;font-size:13px;margin-top:6px}
.check{display:flex!important;gap:8px;align-items:flex-start;font-size:13px;line-height:1.5;cursor:pointer}.check input{margin-top:3px;accent-color:var(--accent)}
.formula{font:13px var(--mono);color:var(--ink2);background:var(--soft);border-radius:10px;padding:9px 12px;margin:12px 0 0;overflow-x:auto}
.metrics{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px;margin-top:18px}
.metric{background:var(--bg);border:1px solid var(--line);border-radius:12px;padding:10px 14px;min-width:0}
.metric small{display:block;font-size:12px;color:var(--muted)}.metric strong{display:block;font:650 clamp(18px,2vw,23px) var(--mono);letter-spacing:-.5px;margin:2px 0}.metric em{font-style:normal;font-size:11.5px;color:var(--muted)}
.metric.ok strong{color:var(--green)}.metric.bad strong{color:var(--bad)}
.result-note{font-size:13.5px;line-height:1.75;color:var(--ink2);background:var(--tint);border-radius:12px;padding:11px 14px;margin-top:14px}
.predict{border:1px dashed var(--accent);border-radius:14px;padding:12px 16px;margin:0 0 16px;background:color-mix(in srgb,var(--accent) 5%,var(--paper))}
.predict .eyebrow{font-size:10px}.predict p{font-size:14.5px;margin:4px 0 10px;line-height:1.65}
.predict-options{display:flex;flex-wrap:wrap;gap:7px}.predict-options button{font-size:13px;padding:6px 12px;border-radius:999px}
.predict-options .correct{background:var(--tint);border-color:var(--green)}.predict-options .wrong{border-color:var(--orange)}
.predict-feedback{font-size:13.5px;color:var(--accent);margin:9px 0 0!important}.predict-feedback:empty{display:none}
.stepper{display:flex;flex-wrap:wrap;gap:6px;align-items:center;margin:12px 0 0}.stepper button{font-size:13px;padding:6px 12px;border-radius:999px}.stepper button.on{background:var(--grad);color:#fff;border-color:transparent}
.view{background:var(--bg);border:1px solid var(--line);border-radius:14px;overflow:hidden;position:relative;min-width:0}
.view canvas{display:block;width:100%;height:360px;touch-action:none;cursor:grab}
.view .hint{position:absolute;left:12px;bottom:10px;font-size:11.5px;color:var(--muted);pointer-events:none}
.view .tag3d{position:absolute;right:12px;top:10px;font:600 10px var(--mono);letter-spacing:1px;color:var(--accent2)}
.legend{display:flex;flex-wrap:wrap;gap:6px 14px;font-size:12px;color:var(--muted);margin-top:8px}.legend i{display:inline-block;width:10px;height:10px;border-radius:3px;margin-right:5px;vertical-align:-1px}
.map-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:10px}
.map-node{text-align:left;padding:14px;border-radius:14px;min-height:84px;position:relative}.map-node small{display:block;font-size:11px;color:var(--muted)}.map-node b{font-size:16px}
.map-node .node-num{position:absolute;right:12px;top:10px;font:11px var(--mono);color:var(--muted)}.map-node.selected{background:var(--tint);border-color:var(--accent)}
.map-detail{display:grid;grid-template-columns:1fr 1.2fr;gap:20px;margin-top:18px}.map-detail h3{margin:0 0 6px;font-size:19px}.map-detail p{font-size:14px;color:var(--ink2);margin:0}.map-detail .diagram{background:var(--bg);border:1px solid var(--line);border-radius:12px;padding:10px}

/* quiz, further reading, planned, footer */
.quiz{background:var(--paper);border:1px solid var(--line);border-radius:var(--radius);padding:20px 24px;margin:46px 0 0;box-shadow:var(--shadow)}
.quiz h2{font-size:19px;line-height:1.55;margin:8px 0 14px}.quiz-options{display:grid;gap:8px}
.quiz-options button{text-align:left;display:flex;gap:12px;align-items:center;padding:11px 16px;border-radius:12px;font-size:15px}.quiz-options button span{font:600 12px var(--mono);color:var(--muted)}
.quiz-options .correct{background:var(--tint);border-color:var(--green)}.quiz-options .wrong{border-color:var(--orange)}
.quiz-feedback{font-size:14.5px;color:var(--accent);min-height:22px;margin:12px 0 0}
.further{margin-top:30px}.further h2{font-size:15px;margin:18px 0 6px}.further ul{padding-left:20px;margin:0}.further li{font-size:14px;color:var(--muted);margin:3px 0}
.planned{border:1px dashed var(--line);border-radius:var(--radius);padding:22px 26px;margin:6px 0 40px;background:var(--paper)}.planned p,.planned li{font-size:15px;color:var(--muted)}
.chapter-footer{display:flex;justify-content:space-between;gap:12px;border-top:1px solid var(--line);margin-top:44px;padding:22px 0;font-size:14px}.chapter-footer a{font-weight:650}.chapter-footer span{font:11px var(--mono);color:var(--muted)}
.site-footer{text-align:center;font-size:12px;color:var(--muted);padding:30px 10px}
.about{max-width:760px;margin:48px auto;padding:0 20px}
.notice{padding:14px;background:var(--tint);border-radius:12px}

@media(max-width:1100px){.experiment{grid-template-columns:1fr}.controls{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:0 18px}}
@media(max-width:900px){
 header{padding:0 16px}.brand small{display:none}#menu{display:block}#theme span{display:none}
 .layout{display:block}#sidebar{display:none;position:fixed;inset:64px auto 0 0;width:300px;z-index:25;background:var(--paper);height:auto;box-shadow:20px 0 60px #0003}
 body.menu-open #sidebar{display:block}main{padding:30px 16px}
 .map-grid{grid-template-columns:repeat(2,1fr)}.map-detail{grid-template-columns:1fr}.metrics{grid-template-columns:repeat(2,minmax(0,1fr))}
 .controls{grid-template-columns:1fr}.view canvas{height:300px}.lead{font-size:17px}body{font-size:16px}
}
@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;transition:none!important;animation:none!important}}
.capgrid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px;margin-top:12px}.cappanel{margin:0;background:#fff;border:2px solid var(--pc);border-radius:14px;overflow:hidden}.cappanel figcaption{background:var(--pc);color:#fff;font-weight:750;font-size:15px;padding:6px 12px}.cappanel svg{display:block;width:100%;height:auto}.cappanel p{font-size:12.5px;line-height:1.6;color:#2b3445;margin:0;padding:6px 12px 10px}
@media(max-width:700px){.capgrid{grid-template-columns:1fr}}
.fig{margin:6px 0 26px;background:var(--paper);border:1px solid var(--line);border-radius:14px;padding:14px 16px 10px}.fig svg{display:block;width:100%;height:auto}.fig figcaption{font-size:13px;color:var(--muted);margin-top:8px;line-height:1.6}
.prose p.cont,article p.cont,p.cont{padding-left:1.45em}
/* causal map */
.chapter:has(.cmap-host){max-width:none}
.chapter:has(.cmap-host)>:not(.prose),.chapter:has(.cmap-host) .prose>:not(.cmap-host){max-width:860px;margin-left:auto;margin-right:auto}
.cmap{display:grid;grid-template-columns:minmax(0,1fr) 320px;gap:16px;margin-top:20px}
@media(max-width:1100px){.cmap{grid-template-columns:1fr}}
.cmap-canvas{background:var(--paper);border:1px solid var(--line);border-radius:var(--radius);overflow:auto;max-height:calc(100vh - 110px);cursor:grab;overscroll-behavior:contain;-webkit-overflow-scrolling:touch}
.cmap-canvas.dragging{cursor:grabbing;user-select:none}
.cmap-canvas svg{display:block}
.cmap-tools{position:sticky;top:0;left:0;z-index:2;display:flex;flex-wrap:wrap;align-items:center;gap:4px;padding:6px 8px;background:color-mix(in srgb,var(--paper) 92%,transparent);border-bottom:1px solid var(--line);cursor:default}
.cmap-tools button{border-radius:999px;padding:2px 10px;font-size:12.5px;line-height:1.5}
.cmap-zl{font:12px var(--mono);min-width:42px;text-align:center;color:var(--muted)}
.cmap-hint{margin-left:auto;font-size:11.5px;color:var(--muted)}
.cmap-col{font:700 12px var(--sans);letter-spacing:.3px}
.cmap-side{background:var(--paper);border:1px solid var(--line);border-radius:var(--radius);padding:16px 18px;position:sticky;top:76px;align-self:start;max-height:calc(100vh - 92px);overflow:auto;font-size:14px;line-height:1.6}
@media(max-width:1100px){.cmap-side{position:static;max-height:none}}
.cmap-side h3{margin:0 0 6px;font-size:18px}.cmap-side h4{margin:16px 0 6px;font-size:13px;color:var(--muted);letter-spacing:.3px}
.cmap-kicker{font:600 11px var(--mono);letter-spacing:1px}
.cmap-help{color:var(--muted);margin:0 0 6px}
.cmap-btns{display:flex;flex-wrap:wrap;gap:6px}.cmap-btns button{font-size:12.5px;padding:4px 10px;border-radius:999px}
.cmap-btns button.primary{border-color:var(--accent);color:var(--accent)}
.cmap-readouts{display:grid;grid-template-columns:1fr 1fr;gap:6px}
.cmap-readouts .ro{background:var(--soft);border-radius:10px;padding:6px 9px;display:flex;flex-direction:column}
.cmap-readouts .ro span{font-size:11.5px;color:var(--muted)}.cmap-readouts .ro b{font:600 14px var(--mono)}.cmap-readouts small{font-weight:400;color:var(--muted)}
.cmap-slider{display:block;font-size:13px;color:var(--muted);margin:10px 0}
.cmap-slider>span{display:flex;justify-content:space-between;gap:8px}.cmap-slider output{font:600 13px var(--mono);color:var(--ink)}
.cmap-eq{overflow-x:auto;margin:8px 0;font-size:14px}
.cnode{cursor:pointer;outline:none}
.cnode rect:first-child{fill:var(--paper);stroke:var(--line);stroke-width:1;transition:fill .25s}
.cnode.param rect:first-child{fill:var(--soft);stroke-dasharray:4 3;stroke:var(--muted)}
.cnode text{font:11.5px var(--sans);fill:var(--ink);pointer-events:none}
.cnode text.v{font:11px var(--mono);fill:var(--ink2)}.cnode text.d{font:600 10.5px var(--mono)}
.cnode.up rect:first-child{fill:color-mix(in srgb,var(--green) 14%,var(--paper))}.cnode.up text.d{fill:var(--green)}
.cnode.down rect:first-child{fill:color-mix(in srgb,var(--bad) 12%,var(--paper))}.cnode.down text.d{fill:var(--bad)}
.cnode.sel rect:first-child,.cnode:focus-visible rect:first-child{stroke:var(--ink);stroke-width:2}
.cnode.dim{opacity:.2}
.cedge{fill:none;stroke:color-mix(in srgb,var(--muted) 45%,transparent);stroke-width:1.2}
.cedge.hl{stroke:var(--ink2);stroke-width:1.8}.cedge.dim{opacity:.12}
.cedge.hot{stroke:var(--accent);stroke-width:2;stroke-dasharray:6 5;animation:cdash .9s linear infinite}
@keyframes cdash{to{stroke-dashoffset:-22}}
@media(prefers-reduced-motion:reduce){.cedge.hot{animation:none}}