:root{color-scheme:dark;--ql-bg:#080f0c;--ql-panel:#101b15;--ql-raised:#16261d;--ql-ink:#e7f0e8;--ql-muted:#a7bcae;--ql-accent:#91e6b2;--ql-line:#2c4435;--ql-warning:#ffd584;--ql-error:#ffaaa6;--ql-shadow:0 20px 65px #0002;--mq-bg:var(--ql-bg);--mq-panel:var(--ql-panel);--mq-surface:var(--ql-panel);--mq-raised:var(--ql-raised);--mq-line:var(--ql-line);--mq-wire:#648e74;--mq-text:var(--ql-ink);--mq-muted:var(--ql-muted);--mq-green:var(--ql-accent);--mq-blue:#76d7ff;--mq-violet:#bfacff;--mq-coral:#ffaaa6;--mq-amber:#ffd584;--mq-on-accent:#07130c}
:root[data-theme=light]{color-scheme:light;--ql-bg:#f5f7f1;--ql-panel:#fff;--ql-raised:#eaf0e6;--ql-ink:#193127;--ql-muted:#4c6557;--ql-accent:#086944;--ql-line:#c6d4c8;--ql-warning:#805000;--ql-error:#a52f42;--mq-wire:#657d6c;--mq-blue:#075d96;--mq-violet:#713ea4;--mq-coral:#a52f42;--mq-amber:#805000;--mq-on-accent:#fff}
*{box-sizing:border-box}html{background:var(--ql-bg);scroll-behavior:auto}body{margin:0;background:var(--ql-bg);color:var(--ql-ink);font-family:Arial,Helvetica,sans-serif;font-size:16px;line-height:1.6}a{color:inherit}button,input,select,textarea{font:inherit}button,a,input,select,summary,textarea{-webkit-tap-highlight-color:transparent}a,button{touch-action:manipulation}button{cursor:pointer}button:disabled{opacity:.45;cursor:not-allowed}button:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible,summary:focus-visible,[tabindex="0"]:focus-visible{outline:3px solid var(--ql-accent);outline-offset:4px}input[type=checkbox]{width:18px;height:18px;accent-color:var(--ql-accent)}[hidden]{display:none!important}
.ql-sr{position:absolute!important;width:1px!important;height:1px!important;padding:0!important;margin:-1px!important;overflow:hidden!important;clip:rect(0,0,0,0)!important;white-space:nowrap!important;border:0!important}.ql-skip{position:fixed;top:-120px;left:20px;padding:12px 22px;z-index:100;background:var(--ql-accent);color:var(--ql-bg)}.ql-skip:focus{top:10px}
.ql-top{height:86px;border-bottom:1px solid var(--ql-line);display:flex;align-items:center;justify-content:space-between;padding:0 34px;background:var(--ql-bg);position:relative;z-index:20;gap:20px}.ql-identity{display:flex;align-items:center;gap:13px;text-decoration:none;font-size:15px;letter-spacing:.02em;font-weight:600;line-height:1.4}.ql-identity small{display:block;font-weight:400;letter-spacing:.04em;font-size:10px;text-transform:uppercase;color:var(--ql-muted);margin-top:4px}.ql-mark{display:flex;align-items:center;justify-content:center;width:40px;height:40px;border:1px solid var(--ql-accent);border-radius:50%;color:var(--ql-accent);font:24px Georgia,serif}.ql-top nav{display:flex;align-items:center;gap:26px;font-size:13px}.ql-top nav a{text-decoration:none}.ql-top nav a:hover{color:var(--ql-accent)}.ql-icon{background:transparent;color:var(--ql-ink);border:1px solid var(--ql-line);border-radius:50%;height:40px;min-width:40px;font-size:20px;padding:0;display:grid;place-items:center}.ql-preview{font-size:11px;color:var(--ql-muted)}.ql-menu{display:none}
.ql-layout{display:grid;grid-template-columns:244px minmax(0,1fr);max-width:1900px;margin:auto;min-height:calc(100vh - 86px)}.ql-sidebar{border-right:1px solid var(--ql-line);padding:36px 23px 25px;position:sticky;top:0;height:100vh;max-height:100vh;overflow:auto;scrollbar-width:thin}.ql-lab-home{display:block;text-decoration:none;font:12px/1.6 ui-monospace,SFMono-Regular,Consolas,monospace;color:var(--ql-accent);letter-spacing:.1em}.ql-lab-home span{display:block;color:var(--ql-muted);font-size:10px;letter-spacing:.06em;margin-top:4px}.ql-side-caption{font:10px ui-monospace,monospace;letter-spacing:.16em;color:var(--ql-muted);margin:32px 0 13px}.ql-side-link{display:flex;gap:12px;padding:12px 8px;text-decoration:none;font-size:12px;line-height:1.4;border-left:2px solid transparent}.ql-side-link b{font:11px ui-monospace,monospace;color:var(--ql-muted);padding-top:2px}.ql-side-link[aria-current]{background:var(--ql-raised);color:var(--ql-accent);border-color:var(--ql-accent)}.ql-side-link:hover{background:var(--ql-panel)}.ql-side-details{border-top:1px solid var(--ql-line);margin-top:25px;padding-top:15px}.ql-side-details summary{font-size:11px;cursor:pointer;color:var(--ql-muted);padding:7px 0}.ql-side-details a{display:flex;gap:9px;text-decoration:none;font-size:11px;padding:8px 4px;color:var(--ql-muted);line-height:1.5}.ql-side-details a span{font:10px ui-monospace,monospace;min-width:15px;padding-top:3px}.ql-side-details a[aria-current]{color:var(--ql-accent);text-decoration:underline;text-underline-offset:4px}.ql-side-footer{border-top:1px solid var(--ql-line);padding-top:20px;margin-top:35px;font-size:10px;line-height:1.8;color:var(--ql-muted)}.ql-side-footer p:first-child{font-size:11px;color:var(--ql-ink)}.ql-side-footer a{display:inline-block;margin-top:12px;text-underline-offset:4px}
#ql-main{min-width:0;padding:44px clamp(24px,4.4vw,76px) 70px;outline:none}.ql-eyebrow{font:10px/1.7 ui-monospace,SFMono-Regular,Consolas,monospace;letter-spacing:.13em;color:var(--ql-accent);text-transform:uppercase;margin:0 0 22px}.ql-hero{display:grid;grid-template-columns:minmax(0,1fr) 280px;align-items:center;gap:30px;padding:24px 0 35px}.ql-hero h1{font:clamp(42px,4.6vw,72px)/1.04 Georgia,'Times New Roman',serif;letter-spacing:-.045em;margin:0 0 27px}.ql-hero h1 em{font-weight:400;color:var(--ql-accent)}.ql-lead{font:18px/1.7 Georgia,'Times New Roman',serif;color:var(--ql-muted);max-width:750px;margin:0 0 24px}.ql-hero .ql-lead{max-width:540px}.ql-hero-art{width:100%;max-width:290px;color:var(--ql-accent);opacity:.78}.ql-actions{display:flex;align-items:center;flex-wrap:wrap;gap:12px}.ql-button,.ql-native button{display:inline-flex;gap:20px;align-items:center;justify-content:center;min-height:44px;padding:10px 17px;border:1px solid var(--ql-line);border-radius:4px;background:transparent;color:var(--ql-ink);text-decoration:none;font-size:12px;font-weight:500;line-height:1.45}.ql-button:hover,.ql-native button:hover:not(:disabled){border-color:var(--ql-accent);background:var(--ql-raised)}.ql-button.ql-primary{background:var(--ql-accent);border-color:var(--ql-accent);color:var(--ql-bg)}.ql-button.ql-primary:hover{filter:brightness(1.06)}.ql-intro-strip{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));border-block:1px solid var(--ql-line);padding:22px 0;gap:20px;margin:15px 0 49px}.ql-intro-strip b{font:11px ui-monospace,monospace;color:var(--ql-ink)}.ql-intro-strip p{font-size:12px;color:var(--ql-muted);margin:8px 0 0}.ql-section-heading{display:flex;justify-content:space-between;gap:24px;align-items:end;margin-bottom:23px}.ql-section-heading .ql-eyebrow{margin-bottom:9px}.ql-section-heading h2{font:30px/1.2 Georgia,serif;margin:0}.ql-search{font-size:10px;color:var(--ql-muted);min-width:200px;display:grid;gap:4px}.ql-search input{background:var(--ql-panel);border:1px solid var(--ql-line);border-radius:4px;padding:11px 13px;color:var(--ql-ink);font-size:12px;width:100%}.ql-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:15px}.ql-module-card{display:block;text-decoration:none;border:1px solid var(--ql-line);padding:24px 26px 21px;border-radius:5px;background:var(--ql-panel);transition:background .15s ease,border-color .15s ease}.ql-module-card:hover{border-color:var(--ql-accent);background:var(--ql-raised)}.ql-card-number{display:flex;align-items:center;justify-content:space-between;margin-bottom:23px}.ql-card-number span{font:26px Georgia,serif;color:var(--ql-accent)}.ql-card-number small{font:10px ui-monospace,monospace;color:var(--ql-muted)}.ql-module-card h3{font:27px/1.15 Georgia,serif;margin:0 0 10px;letter-spacing:-.02em}.ql-module-card p{font-size:12px;line-height:1.6;color:var(--ql-muted);margin:0 0 24px}.ql-card-bottom{border-top:1px solid var(--ql-line);padding-top:15px;display:flex;align-items:center;justify-content:space-between;gap:12px;font-size:11px;color:var(--ql-muted)}.ql-card-bottom b{color:var(--ql-accent);font-size:20px}.ql-footnote{margin:42px 0 0;padding:26px 0;border-top:1px solid var(--ql-line);max-width:760px}.ql-footnote h2{font:25px Georgia,serif;margin:0 0 12px}.ql-footnote p{font:15px/1.8 Georgia,serif;color:var(--ql-muted)}.ql-footnote a{font-size:12px;color:var(--ql-accent);text-underline-offset:4px}.ql-result{display:grid;gap:6px;padding:20px 0;border-top:1px solid var(--ql-line);text-decoration:none}.ql-result span{font:10px ui-monospace,monospace;color:var(--ql-accent)}.ql-result strong{font:23px Georgia,serif}.ql-result small{font-size:13px;color:var(--ql-muted)}
.ql-breadcrumb{display:flex;flex-wrap:wrap;gap:9px;font-size:11px;line-height:1.5;color:var(--ql-muted);margin:0 0 35px}.ql-breadcrumb a{text-decoration:none}.ql-breadcrumb a:hover{text-decoration:underline}.ql-module-heading h1,.ql-activity-heading h1,.ql-prose h1{font:clamp(34px,3.8vw,56px)/1.13 Georgia,serif;letter-spacing:-.035em;margin:0 0 22px;max-width:900px}.ql-module-heading{padding:10px 0 32px}.ql-path-note{display:grid;grid-template-columns:minmax(0,1.5fr) minmax(0,1fr);gap:36px;padding:25px 0;border-block:1px solid var(--ql-line);margin-bottom:30px}.ql-path-note h2{font:20px Georgia,serif;margin:0 0 12px}.ql-path-note p{font:14px/1.8 Georgia,serif;color:var(--ql-muted);margin:0 0 12px}.ql-path-note summary{font-size:13px;cursor:pointer;margin-bottom:10px}.ql-path-note a{font-size:12px;color:var(--ql-accent)}.ql-activity-card{display:grid;grid-template-columns:35px minmax(0,1fr) 20px;align-items:center;gap:18px;text-decoration:none;padding:24px 5px;border-bottom:1px solid var(--ql-line)}.ql-activity-card:hover{background:var(--ql-panel)}.ql-order{align-self:start;font:13px ui-monospace,monospace;color:var(--ql-muted);padding-top:4px}.ql-tag{font:9px ui-monospace,monospace;color:var(--ql-accent);text-transform:uppercase;letter-spacing:.08em}.ql-activity-card h2{font:25px/1.3 Georgia,serif;margin:7px 0 9px}.ql-activity-card p{font-size:13px;color:var(--ql-muted);margin:0;line-height:1.7}.ql-activity-card>b{font-size:20px;color:var(--ql-accent)}.ql-muted{color:var(--ql-muted);font-size:11px}.ql-link{font-size:12px;color:var(--ql-accent);text-underline-offset:4px}.ql-prose{max-width:850px}.ql-prose h2{font:27px Georgia,serif;margin:40px 0 13px}.ql-prose p{font:16px/1.9 Georgia,serif;color:var(--ql-muted)}.ql-prose a{color:var(--ql-accent);text-underline-offset:4px}
.ql-activity-heading{padding-bottom:24px}.ql-activity-heading .ql-lead{font-size:18px}.ql-activity-meta{display:flex;gap:24px;align-items:center;justify-content:space-between;flex-wrap:wrap}.ql-text-button{background:transparent;border:0;color:var(--ql-muted);font-size:11px;min-height:40px;padding:8px}.ql-text-button:hover{color:var(--ql-accent)}.ql-mode-switch{display:flex;gap:5px;border-bottom:1px solid var(--ql-line);padding:4px 0 0;margin-bottom:25px;position:sticky;top:0;z-index:8;background:var(--ql-bg)}.ql-mode-switch button{background:transparent;border:0;border-bottom:2px solid transparent;color:var(--ql-muted);font-size:12px;min-height:49px;padding:12px 18px}.ql-mode-switch button[aria-pressed=true]{border-color:var(--ql-accent);color:var(--ql-accent);background:var(--ql-panel)}.ql-orientation{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:30px;padding:24px 26px;background:var(--ql-panel);border:1px solid var(--ql-line);border-radius:5px}.ql-small-label{font:9px ui-monospace,monospace;color:var(--ql-accent);letter-spacing:.09em}.ql-orientation p{font:15px/1.8 Georgia,serif;color:var(--ql-ink);margin:8px 0 0}.ql-model-note{margin:18px 0 24px;padding:12px 17px;border-left:2px solid var(--ql-accent);font:14px/1.75 Georgia,serif;color:var(--ql-muted)}.ql-model-note strong{color:var(--ql-ink)}.ql-contrast{margin:28px 0;padding:20px 24px;border:1px solid var(--ql-line);border-radius:4px}.ql-contrast h2{font:22px Georgia,serif;margin:0 0 10px}.ql-contrast p{font:15px/1.8 Georgia,serif;color:var(--ql-muted);margin:0}.ql-next{display:flex;justify-content:space-between;gap:25px;border-top:1px solid var(--ql-line);padding-top:24px;margin-top:32px;font-size:12px}.ql-next a{text-decoration:none;color:var(--ql-accent)}.ql-loading{padding:36px;border:1px dashed var(--ql-line);font:15px Georgia,serif}.ql-study[data-mode=explore]>.ql-orientation,.ql-study[data-mode=explore]>.ql-contrast{display:none}
.ql-control-panel{border:1px solid var(--ql-line);background:var(--ql-panel);padding:22px 25px;border-radius:5px}.ql-panel-title{display:flex;justify-content:space-between;gap:20px;align-items:center;margin-bottom:20px}.ql-panel-title h2{font:23px Georgia,serif;margin:0}.ql-panel-title>span{font:9px ui-monospace,monospace;color:var(--ql-muted);letter-spacing:.08em}.ql-controls{display:flex;flex-wrap:wrap;gap:20px;align-items:end}.ql-control{display:grid;gap:8px;font-size:12px;flex:1;min-width:160px;max-width:340px}.ql-control>span:first-child{color:var(--ql-muted)}.ql-input-unit{display:flex;gap:10px;align-items:center}.ql-control input,.ql-control select,.ql-export textarea{width:100%;min-height:43px;border:1px solid var(--ql-line);background:var(--ql-bg);color:var(--ql-ink);padding:10px 12px;border-radius:3px}.ql-control input[type=number]{font-family:ui-monospace,monospace}.ql-check{display:flex;align-items:center;gap:10px;font-size:12px;line-height:1.7;min-height:43px;max-width:350px}.ql-marked{border:1px solid var(--ql-line);border-radius:4px;padding:12px 15px;display:flex;flex-wrap:wrap;gap:15px;min-width:min(100%,300px)}.ql-marked legend{font-size:11px;padding:0 6px;color:var(--ql-muted)}.ql-marked label{display:flex;gap:7px;align-items:center;font:13px ui-monospace,monospace}.ql-presets{display:flex;gap:8px;flex-wrap:wrap;flex-basis:100%;padding-top:4px}.ql-native .ql-presets button{font-size:11px;padding:8px 12px;min-height:39px}.ql-native-results{padding:25px 0 0;min-width:0}.ql-native-results h3{font:22px Georgia,serif}.ql-native-results>p{font:14px/1.8 Georgia,serif}.ql-circuit{display:flex;gap:12px;align-items:center;justify-content:center;flex-wrap:wrap;padding:25px 10px 28px;font:13px ui-monospace,monospace}.ql-circuit span{padding:10px 16px;border:1px solid var(--ql-line);border-radius:3px}.ql-circuit span.active{color:var(--ql-accent);border-color:var(--ql-accent);background:var(--ql-raised)}.ql-circuit i{color:var(--ql-muted)}.ql-stage-nav{display:flex;align-items:center;justify-content:space-between;gap:14px;padding:13px 0;border-block:1px solid var(--ql-line);margin:0 0 24px}.ql-stage-nav>span{font-size:12px;text-align:center;line-height:1.6}.ql-stage-nav b{display:block;font:10px ui-monospace,monospace;color:var(--ql-muted);margin-bottom:5px}.ql-stage-nav button{font-size:11px;min-width:110px;gap:4px}.ql-result-grid{display:grid;grid-template-columns:minmax(220px,.85fr) minmax(0,1.15fr);gap:25px;align-items:start;margin:16px 0}.ql-vector{margin:0;padding:17px 12px;background:var(--ql-panel);border:1px solid var(--ql-line);border-radius:4px}.ql-vector figcaption,.ql-distribution figcaption{font-size:12px;font-weight:600;color:var(--ql-ink);padding:0 0 16px}.ql-vector figcaption{text-align:center}.ql-vector svg{width:100%;max-height:320px;display:block;overflow:visible}.ql-vector svg text{font:10px ui-monospace,monospace;fill:var(--ql-muted)}.ql-distribution{margin:0;padding:16px 0}.ql-prob-bars{display:flex;flex-direction:column;gap:14px}.ql-prob-row{display:grid;grid-template-columns:45px minmax(0,1fr) 65px;gap:12px;align-items:center;font:12px ui-monospace,monospace}.ql-prob-row strong{font-weight:400;text-align:right}.ql-track{height:15px;background:var(--ql-raised);position:relative;border-radius:2px}.ql-track>span{display:block;height:100%;background:var(--ql-accent);border-radius:2px}.ql-track>i{height:23px;top:-4px;width:2px;background:var(--ql-warning);position:absolute;transform:translateX(-1px)}.ql-caption{font:11px/1.8 Arial,sans-serif;color:var(--ql-muted);margin:15px 0 5px}.ql-metrics{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px;margin-bottom:23px}.ql-metric{padding:19px 16px;background:var(--ql-panel);border:1px solid var(--ql-line);border-radius:4px}.ql-metric>span{display:block;color:var(--ql-muted);font-size:10px;line-height:1.5;margin-bottom:10px}.ql-metric>strong{display:block;color:var(--ql-accent);font:22px/1.4 ui-monospace,monospace;overflow-wrap:anywhere}.ql-metric>small{font-size:10px;color:var(--ql-muted)}.ql-interpretation{padding:22px 25px;margin:20px 0;background:var(--ql-raised);border-left:2px solid var(--ql-accent);border-radius:0 4px 4px 0}.ql-interpretation h3{font:22px Georgia,serif;margin:0 0 13px}.ql-interpretation p{font:15px/1.85 Georgia,serif;margin:10px 0}.ql-measure-tools{border-block:1px solid var(--ql-line);padding:20px 0;margin-top:20px}.ql-measure-tools b{font-size:13px}.ql-measure-tools p{font-size:12px;color:var(--ql-muted);margin:8px 0 18px}.ql-measure-tools .ql-actions>span{font:11px ui-monospace,monospace;color:var(--ql-muted)}.ql-table-wrap{width:100%;max-width:100%;overflow:auto;margin:18px 0;border:1px solid var(--ql-line);border-radius:3px}.ql-table-wrap table{border-collapse:collapse;width:100%;font:11px/1.65 ui-monospace,monospace;color:var(--ql-ink)}.ql-table-wrap caption{text-align:left;padding:12px;font:11px/1.7 Arial,sans-serif;color:var(--ql-muted)}.ql-table-wrap th,.ql-table-wrap td{text-align:left;padding:11px 13px;border-bottom:1px solid var(--ql-line);white-space:nowrap}.ql-table-wrap thead{background:var(--ql-raised)}.ql-table-wrap th{font-weight:600}.ql-table-wrap th[scope=row]{font-weight:400}.ql-table-wrap tr:last-child>*{border-bottom:0}.ql-bb-table{max-height:420px}.ql-bb-table thead{position:sticky;top:0}.ql-public-row{background:var(--ql-raised)}.ql-bitstring{display:block;overflow-wrap:anywhere;white-space:normal;max-width:100%;font-size:12px}.ql-warning{padding:16px 20px;border:1px solid var(--ql-line);border-left:2px solid var(--ql-warning);color:var(--ql-warning);font:13px/1.8 Georgia,serif}.ql-protocol-flow{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:20px 0 27px;flex-wrap:wrap}.ql-protocol-flow>div{display:grid;gap:6px;padding:15px;border:1px solid var(--ql-line);border-radius:4px;flex:1;min-width:125px}.ql-protocol-flow b{font:17px Georgia,serif}.ql-protocol-flow div>span{font-size:10px;color:var(--ql-muted)}.ql-flow-arrow{font:23px Georgia,serif;text-align:center;flex:0 1 auto;color:var(--ql-accent)}.ql-flow-arrow small{display:block;font:9px/1.6 Arial,sans-serif;max-width:120px;color:var(--ql-muted)}.ql-calculation{display:none;border-top:1px solid var(--ql-line);padding-top:28px;margin-top:25px;max-width:100%;overflow:hidden}.ql-study[data-mode=math] .ql-calculation{display:block}.ql-calculation h3{font:26px Georgia,serif;margin:0 0 15px}.ql-calculation p{font:16px/1.9 Georgia,serif;color:var(--ql-ink)}.ql-calculation math{font-size:22px;margin:24px 0;overflow:auto}.ql-export{display:flex;gap:10px;flex-wrap:wrap;margin-top:25px}.ql-native .ql-export button{font-size:10px;padding:9px 12px}.ql-export textarea,#ql-native-error textarea{width:100%;min-height:90px;background:var(--ql-panel);color:var(--ql-ink);border:1px solid var(--ql-line);padding:12px;font:12px monospace}#ql-native-error{color:var(--ql-error);font-size:13px;margin-top:14px}.ql-native details{border:1px solid var(--ql-line);padding:13px 18px;margin:15px 0}.ql-native details summary{cursor:pointer;font-size:12px}
/* Compatibility adapter: no old app shell, no duplicated manual. Preserve the mounted React tree across modes. */
.ql-legacy{max-width:100%;min-width:0;overflow-wrap:anywhere;font-family:Arial,sans-serif}.ql-legacy>*{max-width:100%;min-width:0}.ql-legacy svg,.ql-legacy canvas{max-width:100%}.ql-legacy .book-geometry{position:static;top:auto;max-height:none}.ql-legacy .book-worked{scroll-margin-top:65px}.ql-legacy .book-example-grid{min-width:0}.ql-legacy .book-theory{margin-top:0}.ql-legacy .book-lesson>.book-exploration{border:1px solid var(--ql-line);border-radius:5px}.ql-legacy .book-exploration>summary{padding:17px;cursor:pointer}.ql-legacy .book-table-wrap,.ql-legacy .equation{max-width:100%;overflow-x:auto}.ql-legacy .book-table-wrap:focus-visible{outline:3px solid var(--ql-accent)}.ql-legacy .book-reading-tools{font-size:12px}.ql-study:not([data-mode=math]) .ql-legacy .book-lesson>.book-theory,.ql-study:not([data-mode=math]) .ql-legacy .book-calculations,.ql-study:not([data-mode=math]) .ql-legacy .book-lesson>.book-comparison,.ql-study:not([data-mode=math]) .ql-legacy .book-lesson>.book-reading-tools{display:none}.ql-study:not([data-mode=math]) .ql-legacy .book-example-grid{display:block}.ql-study[data-mode=explore] .ql-legacy .book-lesson>.book-worked,.ql-study[data-mode=explore] .ql-legacy .book-lesson>.book-interactive-controls,.ql-study[data-mode=explore] .ql-legacy .book-lesson>.book-scope,.ql-study[data-mode=explore] .ql-legacy .book-lesson>.book-bridge{display:none}.ql-legacy .experiment-instructions{margin:10px 0}.ql-legacy .geo-field input,.ql-legacy select{color:var(--ql-ink);background:var(--ql-panel)}
@media(min-width:1600px){#ql-main{max-width:1450px}}@media(max-width:1200px){.ql-layout{grid-template-columns:215px minmax(0,1fr)}.ql-sidebar{padding:28px 15px}.ql-hero{grid-template-columns:minmax(0,1fr) 200px}.ql-hero h1{font-size:54px}.ql-top{padding:0 23px}.ql-top nav{gap:18px}#ql-main{padding:35px 30px 60px}.ql-stage-nav button{min-width:90px;padding:9px}.ql-stage-nav>span{font-size:11px}}
@media(max-width:950px){.ql-layout{grid-template-columns:180px minmax(0,1fr)}.ql-side-link{font-size:11px;padding:11px 5px}.ql-sidebar{padding-inline:12px}.ql-hero{grid-template-columns:minmax(0,1fr);position:relative}.ql-hero-art{position:absolute;width:160px;right:-5px;top:10px;opacity:.15;pointer-events:none}.ql-hero h1{position:relative;z-index:1}.ql-grid{gap:12px}.ql-module-card{padding:20px}.ql-module-card h3{font-size:24px}.ql-section-heading{align-items:start;flex-direction:column}.ql-search{width:100%}.ql-search input{max-width:360px}.ql-result-grid{grid-template-columns:minmax(0,1fr)}.ql-vector svg{max-height:240px}.ql-path-note{grid-template-columns:1fr;gap:16px}.ql-orientation{gap:20px;padding:20px}.ql-metrics{grid-template-columns:repeat(3,minmax(0,1fr))}.ql-metric{padding:15px 12px}.ql-metric>strong{font-size:18px}}
@media(max-width:720px){.ql-top{height:74px;padding:0 18px;gap:10px}.ql-identity{font-size:12px;gap:10px}.ql-identity small{font-size:8px}.ql-mark{width:33px;height:33px;font-size:20px}.ql-top nav{gap:8px}.ql-top nav>a,.ql-preview{display:none}.ql-menu{display:grid}.ql-layout{display:block}.ql-sidebar{display:none;position:fixed;top:74px;left:0;bottom:0;width:min(88vw,310px);height:calc(100dvh - 74px);z-index:30;background:var(--ql-bg);border-right:1px solid var(--ql-accent);box-shadow:10px 10px 80px #0009;padding:28px 22px}.ql-sidebar.is-open{display:block}.ql-side-link{font-size:14px;min-height:47px}.ql-side-details a{font-size:13px;min-height:39px}#ql-main{padding:25px 20px 50px}.ql-eyebrow{font-size:9px;margin-bottom:18px}.ql-hero{padding:13px 0 25px;gap:15px}.ql-hero h1{font-size:49px;line-height:1.08}.ql-hero .ql-lead,.ql-lead{font-size:16px;line-height:1.75}.ql-hero-art{width:145px;top:5px}.ql-actions{gap:10px}.ql-button{padding:11px 14px;font-size:11px;gap:12px}.ql-intro-strip{grid-template-columns:1fr;gap:16px;margin:8px 0 34px;padding:22px 0}.ql-intro-strip>div{display:grid;grid-template-columns:105px minmax(0,1fr);gap:9px;align-items:baseline}.ql-intro-strip p{margin:0;font-size:11px}.ql-intro-strip b{font-size:10px}.ql-section-heading h2{font-size:27px}.ql-grid{grid-template-columns:1fr;gap:13px}.ql-module-card{padding:21px 23px}.ql-card-number{margin-bottom:18px}.ql-module-card h3{font-size:26px}.ql-module-card p{margin-bottom:21px}.ql-card-bottom{font-size:11px}.ql-module-heading h1,.ql-activity-heading h1,.ql-prose h1{font-size:36px}.ql-breadcrumb{margin-bottom:25px;font-size:10px;gap:7px}.ql-module-heading{padding-bottom:24px}.ql-path-note{padding:22px 0}.ql-activity-card{grid-template-columns:24px minmax(0,1fr) 16px;gap:12px;padding:22px 0}.ql-activity-card h2{font-size:23px}.ql-activity-card p{font-size:12px}.ql-order{font-size:11px}.ql-tag{font-size:8px}.ql-mode-switch{gap:0;top:0}.ql-mode-switch button{flex:1;font-size:11px;padding:10px 5px;line-height:1.5}.ql-orientation{grid-template-columns:1fr;gap:20px;padding:20px}.ql-orientation p{font-size:14px}.ql-model-note{font-size:13px;padding:11px 14px}.ql-control-panel{padding:19px 16px}.ql-panel-title{gap:12px;align-items:start}.ql-panel-title h2{font-size:21px}.ql-panel-title>span{font-size:8px;max-width:75px;text-align:right}.ql-control{min-width:120px;max-width:none}.ql-control>span:first-child{font-size:11px}.ql-controls{gap:17px}.ql-check{font-size:11px;max-width:100%}.ql-presets{gap:6px}.ql-native .ql-presets button{font-size:10px;min-height:40px}.ql-circuit{gap:6px;padding:18px 0;font-size:11px}.ql-circuit span{padding:8px 10px}.ql-stage-nav{gap:7px}.ql-stage-nav button{font-size:10px;min-width:70px;padding:8px 6px;max-width:100px}.ql-stage-nav>span{font-size:10px}.ql-stage-nav b{font-size:9px}.ql-metrics{grid-template-columns:1fr;gap:9px}.ql-metric{display:grid;grid-template-columns:1fr 1.1fr;gap:12px;align-items:center}.ql-metric>span{font-size:10px;margin:0}.ql-metric>strong{font-size:19px}.ql-interpretation{padding:20px 18px}.ql-interpretation h3{font-size:21px}.ql-interpretation p{font-size:14px}.ql-protocol-flow{gap:8px}.ql-protocol-flow>div{min-width:95px;padding:12px}.ql-protocol-flow b{font-size:15px}.ql-protocol-flow div>span{font-size:9px}.ql-flow-arrow{font-size:17px}.ql-flow-arrow small{font-size:8px;max-width:65px}.ql-bb-table{max-height:330px}.ql-table-wrap th,.ql-table-wrap td{padding:10px;font-size:10px}.ql-table-wrap caption{font-size:10px}.ql-calculation p{font-size:15px}.ql-calculation h3{font-size:24px}.ql-next{font-size:11px}.ql-prose h2{font-size:24px}.ql-prose p{font-size:15px}.ql-activity-meta{gap:10px}.ql-legacy .book-example-grid{display:block}.ql-legacy .book-geometry{max-width:100%}.ql-legacy .book-worked{padding:14px 8px}.ql-legacy .book-circuit svg{min-width:0}.ql-legacy .circuit-row{overflow-x:auto}.ql-legacy .experiment-fields{grid-template-columns:1fr}.ql-legacy .experiment-fields label{min-width:0}}
@media(prefers-reduced-motion:reduce){*,*::before,*::after{scroll-behavior:auto!important;animation:none!important;transition:none!important}}
@media print{.ql-top,.ql-sidebar,.ql-mode-switch,.ql-export,.ql-control-panel,.ql-next,.ql-skip{display:none!important}.ql-layout{display:block}#ql-main{padding:0}body{background:#fff;color:#183027}.ql-calculation{display:block!important}.ql-study .ql-legacy .book-theory,.ql-study .ql-legacy .book-calculations{display:block!important}.ql-table-wrap{overflow:visible;max-height:none}.ql-vector,.ql-metric,.ql-interpretation{break-inside:avoid}}

.ql-license{white-space:pre-wrap;overflow-wrap:anywhere;font:12px/1.6 monospace;max-width:100%}

/* 5.1 — independent publishing shell. The side geometry never overlays content. */
:root{--ql-rail:0px}
.ql-top,.ql-layout,.ql-global-footer{margin-inline:var(--ql-rail)}
.ql-top{padding-inline:24px}.ql-top nav{gap:18px}.ql-layout{max-width:none}
.ql-side-footer>a{display:block;margin-top:12px}
.ql-lab-home span{font-size:9px;letter-spacing:.04em}
.ql-rail{position:fixed;inset-block:0;width:var(--ql-rail);height:100dvh;pointer-events:none;contain:strict}
.ql-rail-left{left:0}.ql-rail-right{right:0}
#ql-ambient{pointer-events:none;position:relative;z-index:0}
.ql-layout,.ql-global-footer{position:relative;background:var(--ql-bg)}
.ql-global-footer{border-top:1px solid var(--ql-line);padding:22px 32px;display:flex;align-items:center;justify-content:space-between;gap:18px;font:11px/1.8 Arial,sans-serif;color:var(--ql-muted)}
.ql-global-footer p{margin:0}.ql-global-footer span{opacity:.7}.ql-global-footer a{text-underline-offset:4px}
.ql-effects-dialog{width:min(520px,calc(100vw - 32px));max-height:calc(100dvh - 32px);overflow:auto;color:var(--ql-ink);background:var(--ql-panel);border:1px solid var(--ql-line);border-radius:12px;padding:28px;box-shadow:0 30px 120px #0008}
.ql-effects-dialog::backdrop{background:#010805b8;backdrop-filter:blur(5px)}
.ql-effects-heading{display:flex;justify-content:space-between;align-items:start;gap:16px}
.ql-effects-heading .ql-eyebrow{margin:0 0 12px}.ql-effects-heading h2{font:30px/1.2 Georgia,serif;margin:0}
.ql-effects-heading button{border:1px solid var(--ql-line);background:var(--ql-raised);color:var(--ql-ink);width:40px;height:40px;flex-shrink:0;border-radius:50%;font-size:22px}
.ql-effects-dialog p{font-size:14px;line-height:1.8;color:var(--ql-muted)}
.ql-effects-dialog fieldset{margin:22px 0;padding:0;border:0}.ql-effects-dialog legend{font:11px monospace;text-transform:uppercase;letter-spacing:.12em;color:var(--ql-accent);margin-bottom:12px}
.ql-effects-dialog label{display:grid;grid-template-columns:24px 1fr;padding:12px 0;gap:3px 10px;cursor:pointer;font-size:14px}
.ql-effects-dialog label small{grid-column:2;font-size:12px;color:var(--ql-muted)}
.ql-effects-dialog input{accent-color:var(--ql-accent);width:18px;height:18px;align-self:center;margin:0}
.ql-effects-dialog label:has(input:disabled){opacity:.5}.ql-effects-dialog .ql-button{background:var(--ql-raised);color:var(--ql-ink)}
@media(min-width:1200px){:root{--ql-rail:clamp(76px,7.5vw,142px)}.ql-layout{grid-template-columns:220px minmax(0,1fr)}#ql-main{padding:40px clamp(26px,3.4vw,58px) 68px}.ql-sidebar{padding:31px 18px}.ql-hero{grid-template-columns:minmax(0,1fr) 210px}.ql-hero h1{font-size:clamp(48px,4.5vw,69px)}.ql-hero-art{width:100%;max-height:250px}.ql-top{border-inline:1px solid var(--ql-line)}.ql-layout{border-inline:1px solid var(--ql-line)}}
@media(max-width:1199px){#ql-ambient{display:none}}
@media(max-width:720px){.ql-top{padding-inline:14px;gap:8px}.ql-top nav{gap:7px}.ql-identity{font-size:14px}.ql-identity small{font-size:8px;max-width:170px}.ql-global-footer{padding:22px 20px;display:block}.ql-global-footer p+p{margin-top:8px}.ql-effects-dialog{padding:21px}.ql-effects-heading h2{font-size:26px}}
@media(max-width:360px){.ql-identity small{max-width:135px;font-size:7px}.ql-identity{gap:7px;font-size:12px}.ql-top nav{gap:5px}.ql-top .ql-icon{width:32px;height:38px}.ql-mark{width:28px;height:28px}}
@media print{#ql-ambient,#ql-effects-dialog,.ql-global-footer{display:none!important}:root{--ql-rail:0px}}