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var(--reading-bg-filter);transform:scale(var(--reading-bg-zoom))}.reading-bg:after{content:"";position:absolute;inset:0;background:var(--reading-bg-dim-color);opacity:var(--reading-bg-dim)}.topbar,.card,.reader>aside,.search-box,.ctx-menu{background:var(--panel-bg);-webkit-backdrop-filter:blur(var(--panel-blur));backdrop-filter:blur(var(--panel-blur))}:root[data-bg] body,:root[data-bg] .page,:root[data-bg] .reader{background:transparent}.readbar{position:fixed;top:var(--topbar-h);left:0;right:0;z-index:41;height:3px;pointer-events:none}.readbar>i{display:block;width:0;height:100%;background:var(--accent);transition:width .08s linear}@media(prefers-reduced-motion:reduce){.readbar>i{transition:none}}.center{display:grid;place-items:center;min-height:60vh}.reader{display:grid;grid-template-columns:var(--rail-w) minmax(0,1fr);align-items:start;gap:0;min-height:calc(100vh - var(--topbar-h))}.reader:before{content:"";grid-column:1;grid-row:1;align-self:stretch;height:100%;background:var(--panel-bg);border-right:1px solid var(--line)}.reader>aside{grid-column:1;grid-row:1}.reader>main{grid-column:2;grid-row:1}.reader>aside{position:sticky;top:var(--topbar-h);height:calc(100vh - var(--topbar-h));overflow:auto;padding:14px 10px 40px}.rail-nav{display:flex;flex-direction:column;gap:2px}.rail-chapter{margin-bottom:10px}.rail-link{display:block;width:100%;text-align:left;background:transparent;border:1px solid transparent;color:var(--text-dim);font-family:var(--reading-font);font-size:calc(.8125rem * var(--reading-scale));padding:4px 8px;line-height:1.35}.rail-link.chapter{color:var(--text);font-weight:700}.rail-link:hover{background:#ffffff0d;border-color:var(--line-2);color:var(--text)}.rail-link.active{background:var(--pick-bg);border-color:var(--pick-line);color:var(--text-hi)}.reader>main{min-width:0;padding:0 26px 80px}.article-html{max-width:860px}.article-html [data-hotspot]{border-left:2px solid var(--warn);padding-left:10px;margin-left:-12px}.select-tip{position:fixed;z-index:50;transform:translate(-50%,-100%)}@media(max-width:1000px){.reader{grid-template-columns:1fr}.reader{min-height:0}.reader:before{display:none}.reader>aside,.reader>main{grid-column:1;grid-row:auto}.reader>aside{position:static;height:auto;border-bottom:1px solid var(--line)}.reader>main{padding:0 14px 60px}}.diagram{margin:18px 0;padding:12px;background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);overflow-x:auto}.diagram figcaption{color:var(--text-dim);font-size:.8125rem;margin-bottom:8px}.diagram svg{max-width:100%;height:auto}.diagram pre{margin:0;white-space:pre-wrap;color:var(--text-dim)}.roles{display:flex;flex-direction:column;gap:6px}.role{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:10px 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ease-out}@keyframes veil-in{0%{opacity:0}to{opacity:1}}@keyframes box-in{0%{opacity:0;transform:translateY(-8px) scale(.985)}to{opacity:1;transform:none}}.search-box{animation:box-in var(--fast-2) ease-out;width:min(680px,100%);align-self:flex-start;max-height:76vh;display:flex;flex-direction:column;gap:10px;padding:14px;border:1px solid var(--line-2);border-radius:var(--radius);box-shadow:0 18px 60px #00000073}.search-input{font-size:1.1rem;padding:10px 12px}.search-hits{overflow-y:auto;display:flex;flex-direction:column;gap:2px}.search-hit{display:flex;flex-direction:column;gap:3px;align-items:stretch;text-align:left;border:1px solid transparent;background:transparent;padding:7px 9px}.search-hit[data-active=true]{background:var(--pick-bg);border-color:var(--pick-line)}.search-hit-title{color:var(--text-hi)}.search-foot{gap:14px;border-top:1px solid var(--line);padding-top:8px}.article-html.article-html .two{grid-template-columns:1fr}.article-html.article-html .two>*{min-width:0}@media(max-width:900px){.search-btn-text{display:none}.search-btn{display:inline-flex;align-items:center;padding:6px 9px}.tabbar{position:fixed;left:0;right:0;bottom:0;z-index:47;display:grid;grid-auto-flow:column;grid-auto-columns:1fr;padding-bottom:env(safe-area-inset-bottom,0px);border-top:1px solid var(--line);background:var(--panel-bg);-webkit-backdrop-filter:blur(var(--panel-blur));backdrop-filter:blur(var(--panel-blur))}.tabbar a,.tabbar button{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:3px;height:var(--tabbar-h);padding:0;border:0;border-radius:0;background:transparent;color:var(--text-mute);font-size:.62rem;letter-spacing:.01em;transition:color var(--fast) ease}.tabbar a.active,.tabbar button.active{color:var(--accent)}.tabbar a:hover,.tabbar button:hover:not(:disabled){background:transparent;border-color:transparent}.tabbar a:active,.tabbar button:active{color:var(--text-hi)}body{padding-bottom:calc(var(--tabbar-h) + env(safe-area-inset-bottom,0px))}.sheet-back{position:fixed;inset:0;z-index:46;display:flex;align-items:flex-end;background:#00000038;-webkit-backdrop-filter:blur(9px) saturate(1.2);backdrop-filter:blur(9px) saturate(1.2);animation:veil-in var(--fast-2) ease-out}.sheet{width:100%;padding:8px 12px calc(12px + var(--tabbar-h) + env(safe-area-inset-bottom,0px));border-top:1px solid var(--line-2);border-radius:12px 12px 0 0;background:var(--panel-bg);-webkit-backdrop-filter:blur(var(--panel-blur));backdrop-filter:blur(var(--panel-blur));animation:sheet-up var(--fast-2) ease-out}@keyframes sheet-up{0%{transform:translateY(14px);opacity:0}to{transform:none;opacity:1}}.sheet-grip{width:36px;height:4px;margin:0 auto 10px;border-radius:2px;background:var(--line-3)}.sheet-list{display:flex;flex-direction:column;gap:2px}.sheet-list a,.sheet-list button{display:flex;align-items:center;gap:12px;min-height:44px;padding:0 10px;border:0;border-radius:var(--radius);background:transparent;color:var(--text);font-size:.95rem;text-align:left}.sheet-list a.active{background:var(--pick-bg);color:var(--text-hi)}.sheet-list a:active,.sheet-list button:active{background:var(--surface-2)}.topbar .brand{display:block}.search-back{padding:6vh 10px 10px}}.ctx-back{position:fixed;inset:0;z-index:60}.ctx-menu{position:fixed;min-width:210px;max-width:320px;padding:4px;display:flex;flex-direction:column;border:1px solid var(--line-2);border-radius:var(--radius);box-shadow:0 14px 40px #0000007f}.ctx-item{display:flex;align-items:baseline;gap:12px;text-align:left;border:1px solid transparent;background:transparent;padding:6px 9px;white-space:nowrap}.ctx-item>span:first-child{overflow:hidden;text-overflow:ellipsis}.ctx-item>span+span{margin-left:auto}.ctx-item[data-active=true]{background:var(--pick-bg);border-color:var(--pick-line);color:var(--text-hi)}.ctx-item.separated{margin-top:4px;border-top:1px solid var(--line);padding-top:9px;border-radius:0}.article-html mark[data-note]{background:var(--note-yellow);color:inherit;padding:.05em 0;border-bottom:1px solid var(--note-yellow-line);cursor:pointer;transition:background var(--fast) ease}.article-html mark.note-green{background:var(--note-green);border-bottom-color:var(--note-green-line)}.article-html mark.note-blue{background:var(--note-blue);border-bottom-color:var(--note-blue-line)}.article-html mark.note-red{background:var(--note-red);border-bottom-color:var(--note-red-line)}.article-html mark[data-note]:hover{filter:brightness(1.35)}.note-quote{margin:4px 0 0;padding:8px 10px;background:var(--surface-2);border-left:2px solid var(--line-2);max-height:160px;overflow:auto;white-space:pre-wrap;color:var(--text)}.note-colors{gap:6px;margin-top:4px}.note-swatch{width:26px;height:26px;padding:0;flex:none;border:1px solid var(--line-2);border-radius:var(--radius);cursor:pointer}.note-swatch.note-yellow{background:var(--note-yellow-line)}.note-swatch.note-green{background:var(--note-green-line)}.note-swatch.note-blue{background:var(--note-blue-line)}.note-swatch.note-red{background:var(--note-red-line)}.note-swatch.picked{outline:2px solid var(--text-hi);outline-offset:2px}.note-form{margin-top:10px}.note-tabs{flex-wrap:wrap;gap:6px;margin-bottom:14px}.note-list{display:flex;flex-direction:column;gap:10px}.note-card{border-left:3px solid var(--line-2)}.note-edge-yellow{border-left-color:var(--note-yellow-line)}.note-edge-green{border-left-color:var(--note-green-line)}.note-edge-blue{border-left-color:var(--note-blue-line)}.note-edge-red{border-left-color:var(--note-red-line)}.note-body{margin:8px 0 0;color:var(--text-hi);white-space:pre-wrap}.keyhelp h2{margin:0;font-size:1.05rem}.keyhelp-groups{overflow-y:auto;display:grid;grid-template-columns:repeat(auto-fit,minmax(230px,1fr));gap:8px 22px}.keyhelp-groups section{min-width:0}.keyhelp-groups h3{margin:0 0 4px;text-transform:uppercase;letter-spacing:.07em}.keyhelp-groups dl{margin:0;display:flex;flex-direction:column;gap:1px}.keyhelp-row{display:grid;grid-template-columns:3.4rem 1fr;gap:8px;align-items:baseline;padding:3px 0}.keyhelp-row dd{margin:0;min-width:0}.keyhelp kbd{display:inline-block;min-width:1.5rem;text-align:center;font-family:var(--mono);font-size:.78rem;line-height:1.5;padding:1px 5px;color:var(--text-hi);background:var(--surface-3);border:1px solid var(--line-2);border-bottom-width:2px;border-radius:var(--radius)}.link{border:0;background:transparent;padding:0;color:var(--accent);font:inherit}.link:hover{background:transparent;color:var(--text-hi);text-decoration:underline}