@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800&family=Pixelify+Sans:wght@500;600;700&family=Roboto+Mono:wght@400;500;700&display=swap');
:root{--ink:#020835;--blue:#2d7fc1;--sky:#6fb8e3;--light:#bfe2f5;--paper:#f2f1e9;--page:#fffefa;--muted:#515b7d;--line:#d6d9e2;--mono:'Roboto Mono',monospace;--pixel:'Pixelify Sans',var(--mono)}
*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:25px}body{margin:0;color:var(--ink);background:var(--paper);background-image:linear-gradient(#02083506 1px,transparent 1px),linear-gradient(90deg,#02083506 1px,transparent 1px);background-size:32px 32px;font:16px/1.8 Inter,system-ui,sans-serif}a{color:var(--blue);text-underline-offset:4px}a:hover{color:var(--ink)}button,a,summary{-webkit-tap-highlight-color:transparent}a:focus-visible,button:focus-visible,summary:focus-visible{outline:3px solid var(--blue);outline-offset:5px}.skip{position:absolute;top:-100px;left:20px;z-index:40;background:white;padding:10px}.skip:focus{top:15px}.reading-progress{position:fixed;top:0;left:0;width:100%;height:4px;z-index:20}.reading-progress span{display:block;width:0;height:100%;background:var(--blue)}.site-header{max-width:1440px;margin:auto;padding:28px 36px;display:flex;align-items:center;justify-content:space-between;gap:20px;font:12px/1.6 var(--mono)}.site-header a{text-decoration:none}.brand{display:flex;gap:16px;align-items:center;color:var(--ink);font:600 12px/1.5 Inter,sans-serif}.brand b{display:grid;place-items:center;width:44px;height:44px;background:var(--ink);color:var(--sky);font:700 17px var(--pixel);box-shadow:3px 3px 0 var(--blue)}.layout{max-width:1440px;margin:0 auto 70px;padding:0 36px;display:grid;grid-template-columns:230px minmax(0,1fr);gap:38px;align-items:start}.sidebar{position:sticky;top:24px;font-size:12px}.back{display:block;margin:0 0 25px;text-decoration:none;color:var(--muted)}.course-label{padding:15px;background:white;border:1px solid var(--ink);box-shadow:3px 3px 0 var(--blue);margin-bottom:25px}.course-label>b{display:block;font:700 24px Georgia,serif;margin-top:8px}.course-label p{margin:8px 0 0;font:11px/1.8 var(--mono);color:var(--muted)}.eyebrow{font:600 11px/1.6 var(--pixel);letter-spacing:1.3px;text-transform:uppercase;color:var(--blue)}summary{cursor:pointer}.contents summary{color:var(--blue);font:600 12px/1.6 var(--pixel);letter-spacing:1px;padding-bottom:12px}.contents nav{border-top:1px solid var(--ink)}.contents nav a{display:flex;gap:12px;padding:14px 6px;border-bottom:1px solid var(--line);color:var(--muted);text-decoration:none;line-height:1.65}.contents nav a span{font:500 11px/1.8 var(--mono);color:var(--blue);flex-shrink:0}.contents nav a[aria-current]{background:#e2edf4;color:var(--ink);font-weight:700;border-left:3px solid var(--blue);padding-left:9px}.sidebar-note{border-left:3px solid var(--blue);padding:12px 15px;margin:30px 0}.sidebar-note p{margin:10px 0 0;color:var(--muted)}.book{position:relative;min-width:0;background:var(--page);border:2px solid var(--ink);padding-left:30px;box-shadow:8px 8px 0 var(--ink)}.binding{position:absolute;left:0;top:0;bottom:0;width:30px;background:var(--ink);color:var(--sky);writing-mode:vertical-rl;padding:32px 7px;font:10px var(--mono);letter-spacing:3px;border-right:1px dashed #6fb8e380}.page-content{padding:35px 54px 24px}.running-head{display:flex;justify-content:space-between;gap:20px;padding-bottom:20px;border-bottom:1px solid var(--line);margin-bottom:42px;font:10px/1.7 var(--mono);text-transform:uppercase;letter-spacing:1px;color:var(--muted)}h1,h2,h3{font-family:Georgia,'Times New Roman',serif;line-height:1.13;letter-spacing:-.025em}h1{font-size:clamp(36px,3.9vw,58px);margin:20px 0 24px;text-wrap:balance}h1 em{font-weight:inherit;color:var(--blue)}h2{font-size:30px;margin:0 0 22px}h3{font-size:23px;margin:14px 0 16px}p{margin:0 0 20px}.lead{font-size:18px;line-height:1.75;color:var(--muted);max-width:760px}.cover{padding:10px 0 24px}.primary{display:inline-flex;align-items:center;gap:30px;border:2px solid var(--ink);background:var(--ink);color:white;padding:13px 21px;font-size:14px;font-weight:600;text-decoration:none;box-shadow:4px 4px 0 var(--blue);margin:10px 0}.primary:hover{background:var(--blue);color:white}.passport{display:grid;grid-template-columns:repeat(3,1fr);border:2px solid var(--ink);background:#fff;box-shadow:5px 5px 0 var(--ink);margin:24px 0 32px}.passport>div{padding:17px;border-right:1px solid var(--line)}.passport>div:last-child{border:0}.passport small{display:block;font:600 10px var(--pixel);letter-spacing:1px;color:var(--blue);text-transform:uppercase;margin-bottom:10px}.passport b{font-size:12px;font-weight:500}.note{border:1px solid var(--line);border-left:5px solid var(--blue);padding:22px 24px;margin:28px 0;background:white;font-size:15px}.note>b{display:block;margin-bottom:10px}.note p:last-child{margin:0}section{margin:48px 0}.section-heading{display:flex;justify-content:space-between;gap:20px;align-items:baseline}.section-heading .eyebrow{font-size:9px}.route{list-style:none;padding:0;display:grid;grid-template-columns:repeat(5,1fr);border:1px solid var(--ink);counter-reset:route;background:#fff}.route li{padding:15px 10px;border-right:1px solid var(--line);font-size:11px;line-height:1.6;counter-increment:route}.route li:before{content:'0' counter(route);display:block;font:500 11px var(--mono);color:var(--blue);margin-bottom:8px}.route li:last-child{border-right:0}.modules{display:grid;grid-template-columns:1fr 1fr;gap:18px}.module{display:grid;grid-template-columns:30px minmax(0,1fr);border:2px solid var(--ink);box-shadow:5px 5px 0 var(--ink);background:white;text-decoration:none;color:var(--ink)}.module-spine{display:flex;align-items:center;justify-content:center;writing-mode:vertical-rl;transform:rotate(180deg);font:500 10px var(--mono);letter-spacing:2px;background:var(--ink);color:var(--sky)}.module>div{padding:20px}.module h3{font-size:22px;margin:10px 0 13px}.module p{font-size:13px;line-height:1.8;color:var(--muted);margin-bottom:18px}.module-go{font:500 10px var(--mono);color:var(--blue)}.module:hover{box-shadow:3px 3px 0 var(--blue);border-color:var(--blue)}.downloads{display:grid;grid-template-columns:1fr 1fr;gap:15px;margin:24px 0}.downloads a{display:block;border:1px solid var(--ink);padding:20px;text-decoration:none;background:#eff6f9;box-shadow:3px 3px 0 var(--blue);color:var(--ink)}.downloads b{display:block;font-size:14px}.downloads span{display:block;margin-top:7px;font-size:12px;line-height:1.7;color:var(--muted)}.chapter-band{display:flex;justify-content:space-between;gap:15px;background:var(--ink);color:var(--sky);padding:9px 13px;font:500 10px/1.7 var(--mono)}.local-toc{border:1px dashed var(--ink);padding:20px 24px;margin:32px 0 40px}.local-toc .eyebrow{display:block;margin-bottom:10px}.local-toc a{display:block;font-size:13px;margin:7px 0;text-decoration:none;color:var(--ink)}article p,article li{font-size:16px}article ul{padding-left:23px}article li{margin-bottom:12px}code{font: .88em/1.7 var(--mono);border:1px solid var(--line);padding:1px 4px;background:white;overflow-wrap:anywhere}.code{margin:28px 0;border:2px solid var(--ink);background:#10152f;box-shadow:5px 5px 0 var(--ink);min-width:0}.code figcaption{display:flex;justify-content:space-between;gap:20px;background:var(--ink);color:var(--sky);padding:10px 15px;font:500 10px/1.6 var(--mono)}.code figcaption a{color:var(--sky);white-space:nowrap}.code pre{margin:0;padding:22px 20px;overflow:auto;color:#e2e5f1;font:13px/1.9 var(--mono);tab-size:4}.code code{font:inherit;background:none;border:0;padding:0;overflow-wrap:normal}.code--out{background:#fff;box-shadow:5px 5px 0 var(--light)}.code--out figcaption{background:var(--light);color:var(--ink)}.code--out pre{color:var(--ink)}.shot{margin:28px 0;border:2px solid var(--ink);background:#fff;box-shadow:5px 5px 0 var(--ink)}.shot img{display:block;width:100%;height:auto}.shot figcaption{padding:12px 16px;font-size:14px;line-height:1.7;border-top:1px solid var(--line)}.shot figcaption b{display:block;font:500 10px/1.6 var(--mono);color:var(--blue);text-transform:uppercase;letter-spacing:1px;margin-bottom:4px}.case{border:2px solid var(--ink);padding:25px;margin:30px 0;background:#fff;box-shadow:5px 5px 0 var(--light)}.case h3{margin-top:8px}.case details{border-top:1px solid var(--line);margin-top:23px}.case summary{padding:15px 0 0;color:var(--blue);font-size:14px;font-weight:600}.case details[open] summary{margin-bottom:20px}.case details>div>p:last-child{margin-bottom:0}.case .code{box-shadow:none}.table-wrap{overflow:auto;margin:26px 0;border:1px solid var(--line)}table{width:100%;border-collapse:collapse;font-size:13px;background:white}th,td{text-align:left;vertical-align:top;padding:13px 15px;border-bottom:1px solid var(--line);line-height:1.7}th{background:#e5f1f8;color:var(--ink);font-size:12px}tr:last-child td{border:0}.trace{border:2px solid var(--ink);padding:25px;background:#f0f7fb;box-shadow:5px 5px 0 var(--blue)}.array{display:flex;gap:7px;margin:22px 0}.array>span{width:56px;height:56px;display:grid;place-items:center;border:1px solid var(--ink);background:white;font:500 20px var(--mono)}.array .done{background:var(--ink);color:white}.array .boundary{border-right:5px solid var(--blue);margin-right:8px}.trace-state{font:500 15px/1.8 var(--mono);margin:15px 0}.trace-explain{font-size:14px;min-height:50px}.trace small{display:block;color:var(--muted);font-size:11px;margin-top:20px}.controls{display:flex;gap:10px;flex-wrap:wrap}button{font:500 12px/1.5 Inter,sans-serif;cursor:pointer;border:1px solid var(--ink);background:white;color:var(--ink);padding:10px 13px}button:hover{background:var(--light)}button:disabled{opacity:.4;cursor:default}.chapter-nav{display:flex;justify-content:space-between;gap:20px;border-top:2px solid var(--ink);padding:25px 0;margin-top:50px;font-size:13px}.chapter-nav a{text-decoration:none}.page-footer{display:flex;justify-content:space-between;gap:20px;border-top:1px solid var(--line);margin-top:35px;padding-top:20px;color:var(--muted);font:9px/1.8 var(--mono)}
@media(min-width:1600px){.layout{max-width:1520px;grid-template-columns:250px minmax(0,1fr)}.page-content{padding-left:65px;padding-right:65px}}
@media(max-width:1150px){.layout{grid-template-columns:190px minmax(0,1fr);gap:25px;padding:0 25px}.page-content{padding:30px}.section-heading{display:block}.section-heading .eyebrow{display:block;margin-bottom:18px}.module h3{font-size:20px}.module>div{padding:16px}.module{grid-template-columns:25px minmax(0,1fr)}}
@media(max-width:850px){.layout{display:block}.sidebar{position:static;margin-bottom:25px}.back,.course-label,.sidebar-note,.sidebar>a:last-child{display:none}.contents{border:1px solid var(--line);background:var(--page);padding:15px}.contents summary{padding:0}.contents nav{margin-top:12px;display:grid;grid-template-columns:1fr 1fr}.contents nav a{padding:10px;font-size:12px}.book{padding-left:22px}.binding{width:22px;font-size:8px;padding-left:5px}.site-header{padding:22px 25px}h1{font-size:44px}}
@media(max-width:580px){body{font-size:14px}.layout{padding:0 12px;margin-bottom:35px}.site-header{padding:20px 16px}.brand{font-size:10px;gap:10px}.brand b{width:35px;height:35px}.site-header>a:last-child{font-size:9px;max-width:100px;text-align:right}.contents nav{grid-template-columns:1fr}.contents nav a{padding:9px}.book{padding-left:9px;box-shadow:4px 4px 0 var(--ink)}.binding{width:9px;font-size:0;padding:0}.page-content{padding:24px 19px}.running-head{font-size:8px;letter-spacing:0;gap:12px;margin-bottom:28px}.running-head span:last-child{text-align:right}h1{font-size:33px;letter-spacing:-1px;overflow-wrap:anywhere}h2{font-size:26px}h3{font-size:22px}.lead{font-size:15px}.passport{grid-template-columns:1fr}.passport>div{border-right:0;border-bottom:1px solid var(--line);padding:12px;display:flex;justify-content:space-between;gap:10px;align-items:center}.passport small{margin:0}.passport b{font-size:11px}.note{padding:18px;font-size:14px}.route{grid-template-columns:1fr}.route li{display:flex;gap:16px;border-right:0;border-bottom:1px solid var(--line);padding:10px 14px;font-size:12px}.route li br{display:none}.route li:before{margin:0}.route li:last-child{border:0}.modules,.downloads{grid-template-columns:1fr}.module h3{font-size:23px}.module>div{padding:21px}.chapter-band{font-size:8px;padding:9px;gap:8px}.local-toc{padding:17px}article p,article li{font-size:14px;line-height:1.9}.code pre{font-size:11px;padding:16px 13px}.code figcaption{font-size:8px;gap:12px;padding:9px 11px;flex-wrap:wrap}.case{padding:18px}.table-wrap{margin:20px 0}th,td{padding:10px;font-size:11px;min-width:75px}.trace{padding:17px}.array{gap:5px}.array>span{width:38px;height:40px;font-size:16px;flex-shrink:0}.array .boundary{margin-right:3px;border-right-width:4px}.trace-state{font-size:12px}.controls{gap:7px}.controls button{font-size:10px;padding:9px}.chapter-nav{font-size:11px}.page-footer{display:block}.page-footer a{display:block;margin-top:8px}section{margin:36px 0}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}}
@media print{body{background:white;color:black;font-size:11pt}.site-header,.sidebar,.reading-progress,.binding,.skip,.chapter-nav,.controls,.primary{display:none}.layout{display:block;padding:0;margin:0;max-width:none}.book{border:0;box-shadow:none;padding:0}.page-content{padding:0}.code{box-shadow:none;background:#f4f4f4;break-inside:avoid}.code pre{color:black;white-space:pre-wrap}.code figcaption{background:#ddd;color:black}.code figcaption a{display:none}.code--out pre{color:black}.case,.note,.module,.passport,.trace{box-shadow:none}.table-wrap{overflow:visible}a{color:inherit}.modules{grid-template-columns:1fr 1fr}.case{break-inside:avoid}.running-head{margin-bottom:20px}h1{font-size:30pt}h2{font-size:20pt}.trace-explain{min-height:0}}
/* Сцена собеседования: реплики по очереди и заметки интервьюера. */
.scene{margin:32px 0;border:2px solid var(--ink);background:#fff;box-shadow:6px 6px 0 var(--blue)}
.scene figcaption{padding:16px 22px;background:var(--ink);color:#fff}.scene figcaption .eyebrow{color:var(--sky)}
.scene figcaption b{display:block;font:700 22px/1.3 Georgia,serif;margin:6px 0 4px}.scene figcaption small{font:11px/1.6 var(--mono);color:#b8c3de}
.chat{list-style:none;margin:0;padding:22px;display:flex;flex-direction:column;gap:12px;background:repeating-linear-gradient(0deg,#fff 0 31px,#f2f5fa 31px 32px)}
.say{max-width:78%;padding:10px 16px;border:1px solid var(--ink);position:relative}
.say b{display:block;font:600 10px/1.6 var(--pixel);letter-spacing:1px;text-transform:uppercase;margin-bottom:2px}
.say p{margin:0;font-size:15px;line-height:1.65}
.say--i{align-self:flex-start;background:#fff;box-shadow:3px 3px 0 var(--ink)}.say--i b{color:var(--blue)}
.say--k{align-self:flex-end;background:#e2f0f9;box-shadow:3px 3px 0 var(--sky)}.say--k b{color:var(--ink)}
.say.enter{animation:say-in .45s ease both}
@keyframes say-in{from{opacity:0;transform:translateY(12px)}to{opacity:1;transform:none}}
.scene-controls{display:flex;gap:10px;padding:0 22px 18px}.scene-controls:empty{display:none}
.notes{margin:0 22px 22px;padding:16px 18px;border:1px dashed var(--ink);background:#fffdf2}
.notes>b{font:600 11px var(--pixel);letter-spacing:1px;text-transform:uppercase;color:var(--ink)}
.notes ul{list-style:none;padding:0;margin:10px 0}.notes li{padding-left:28px;position:relative;font-size:14px;margin:6px 0}
.notes li:before{position:absolute;left:0;top:0;width:20px;height:20px;display:grid;place-items:center;font:700 13px/1 var(--mono);color:#fff}
.notes .plus:before{content:'+';background:#2e7d50}.notes .minus:before{content:'−';background:#b3261e}
.notes p{margin:0;font-size:14px;font-weight:600}
.notes.enter{animation:say-in .5s ease both}
/* Две трактовки условия. */
.readings,.positions,.overflow,.ruler,.matrix{margin:30px 0;border:2px solid var(--ink);background:#fff;box-shadow:5px 5px 0 var(--light)}
.readings figcaption,.positions figcaption,.overflow figcaption,.ruler figcaption,.matrix figcaption{display:flex;justify-content:space-between;align-items:center;gap:12px;padding:10px 16px;border-bottom:1px solid var(--line)}
.readings figcaption button,.overflow figcaption button,.matrix figcaption button{padding:6px 10px;font-size:11px}
.readings-grid{display:grid;grid-template-columns:1fr 1fr}.readings-grid>div{padding:18px 20px}.readings-grid>div+div{border-left:1px dashed var(--line)}
.readings-grid b{font:700 17px Georgia,serif}.chips{display:flex;gap:8px;margin:12px 0}
.chips span{width:48px;height:44px;display:grid;place-items:center;border:1px solid var(--ink);font:500 18px var(--mono);background:#fff;transition:all .5s}
.chips span.hit{background:var(--ink);color:#fff}.readings .step,.readings .answer{margin:6px 0;font-size:13px}.readings .step{font-family:var(--mono);color:var(--muted)}
.readings .sorted,.readings .step,.readings .answer{opacity:0;transform:translateY(8px);transition:opacity .5s,transform .5s}
.readings.in .step{opacity:1;transform:none;transition-delay:.3s}.readings.in .sorted{opacity:1;transform:none;transition-delay:.9s}.readings.in .answer{opacity:1;transform:none;transition-delay:1.5s}
.readings.in .dup{opacity:.25;text-decoration:line-through;transform:scale(.85);transition-delay:.4s}
/* Значение и индекс. */
.positions .cells{display:flex;gap:10px;padding:22px 20px 8px;flex-wrap:wrap}.positions .cells>div{display:flex;flex-direction:column;align-items:center;gap:4px;width:92px}
.positions .cells span{width:56px;height:52px;display:grid;place-items:center;border:1px solid var(--ink);font:500 20px var(--mono)}
.positions .cells i{font:11px var(--mono);font-style:normal;color:var(--muted)}.positions .cells em{font:10px/1.3 var(--mono);font-style:normal;color:var(--blue);text-align:center}
.positions .hit span{background:var(--ink);color:#fff}.positions .hit--2 span{background:var(--sky);color:var(--ink)}
.positions>p{padding:0 20px 16px;margin:0;font-size:14px}
/* Матрица «тест × ошибка». */
.mini-codes{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px}.mini-codes .code{margin:14px 0}.mini-codes .code pre{font-size:11px;padding:14px}
.matrix .table-wrap{margin:0;border:0}.matrix td.pass{color:var(--muted)}.matrix td.catch{background:#fde8e6;color:#8c1d15;font-weight:600}
.matrix td.count{font:700 15px var(--mono);text-align:center}.matrix tr{transition:opacity .35s}
.matrix.min tr[data-min="False"]{opacity:.28}.matrix.min tr[data-min="True"] td:first-child{box-shadow:inset 4px 0 0 var(--blue)}
/* Сумма и предел int32. */
.bars{position:relative;padding:22px 20px 10px}.bar{display:grid;grid-template-columns:60px 1fr;align-items:center;gap:10px;margin:10px 0;position:relative}
.bar span{font:500 13px var(--mono)}.bar i{display:block;height:28px;width:0;background:var(--sky);border:1px solid var(--ink);transition:width 1.1s cubic-bezier(.2,.7,.2,1)}
.bar b{position:absolute;left:74px;top:4px;font:500 12px var(--mono)}
.bar--sum i{background:var(--blue)}.bar--sum b{color:#fff}
.overflow.in .bar i{width:var(--w)}.overflow.in .bar--sum i{transition-delay:.5s}
.limit{position:absolute;top:14px;bottom:6px;left:calc(90px + (100% - 110px) * var(--x));border-left:3px dashed #b3261e}
.limit em{position:absolute;left:8px;top:2px;font:600 10px/1.4 var(--mono);font-style:normal;color:#b3261e;white-space:nowrap;background:#fff;padding:0 4px}
.overflow>p{margin:0;padding:14px 20px 16px;font-size:13px;color:var(--muted)}
/* Индексы, которые перебирает цикл. */
.ruler-buttons{display:flex;gap:8px;flex-wrap:wrap;padding:16px 20px 0}.ruler-buttons button{font-family:var(--mono)}
.ruler-buttons button[aria-pressed="true"]{background:var(--ink);color:#fff}
.ruler-cells{display:flex;gap:10px;padding:20px}.ruler-cells>div{display:flex;flex-direction:column;align-items:center;gap:6px}
.ruler-cells span{width:64px;height:58px;display:grid;place-items:center;border:1px solid var(--ink);font:500 22px var(--mono);transition:all .3s}
.ruler-cells i{font:12px var(--mono);font-style:normal;color:var(--muted)}
.ruler-cells .seen span{background:#e2f0f9}.ruler-cells .now span{background:var(--ink);color:#fff;transform:translateY(-4px)}
.ruler-cells .skip span{background:repeating-linear-gradient(135deg,#fff 0 6px,#f3d6d3 6px 12px);border-style:dashed}
.ruler-out{margin:0;padding:0 20px 18px;font:13px/1.7 var(--mono)}
/* Банк кейсов. */
.kase-filter{display:flex;flex-wrap:wrap;gap:8px;align-items:center;margin:26px 0}.kase-filter .eyebrow{margin-right:6px}
.kase-filter button{padding:6px 11px;font-size:12px}.kase-filter button[aria-pressed="true"]{background:var(--ink);color:#fff}
.kase{border:2px solid var(--ink);background:#fff;box-shadow:5px 5px 0 var(--ink);padding:22px 24px;margin:0 0 30px}
.kase header{display:flex;gap:16px;align-items:center}.kase-n{display:grid;place-items:center;width:48px;height:48px;background:var(--ink);color:var(--sky);font:700 17px var(--mono);flex-shrink:0}
.kase h3{margin:0}.tag{display:inline-block;margin-top:6px;padding:2px 8px;border:1px solid var(--blue);color:var(--blue);font:500 10px/1.6 var(--mono)}
.kase .task{font-size:17px;margin:16px 0}.kase-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px;border-top:1px solid var(--line);border-bottom:1px solid var(--line);padding:14px 0}
.kase-grid ul{margin:6px 0 0;padding-left:18px}.kase-grid li,.kase-grid p{font-size:14px;margin:4px 0}
.kase-label{font:600 10px var(--pixel);letter-spacing:1px;text-transform:uppercase;color:var(--blue)}
.kase tr.bad td{background:#fde8e6}.kase tr.bad td:last-child{color:#8c1d15;font-weight:700}.kase tr.ok td:last-child{color:#2e7d50}
.kase details{border-top:1px solid var(--line);margin-top:6px}.kase summary{padding:12px 0;color:var(--blue);font-weight:600;font-size:14px}
.lesson-line{background:#eff6f9;padding:10px 14px;border-left:3px solid var(--blue);font-size:14px}
.kase.hidden{display:none}
@media(max-width:850px){.mini-codes{grid-template-columns:1fr}.readings-grid{grid-template-columns:1fr}.readings-grid>div+div{border-left:0;border-top:1px dashed var(--line)}.kase-grid{grid-template-columns:1fr}}
@media(max-width:580px){.say{max-width:94%}.chat{padding:14px}.scene figcaption{padding:14px}.notes{margin:0 14px 14px}.scene-controls{padding:0 14px 14px;flex-wrap:wrap}.kase{padding:16px}.ruler-cells span{width:52px;height:48px}.bar{grid-template-columns:44px 1fr}.bar b{left:56px;font-size:10px}.limit{left:calc(74px + (100% - 90px) * var(--x))}.limit em{font-size:9px}}
@media(prefers-reduced-motion:reduce){.say.enter,.notes.enter{animation:none}.readings *,.bar i,.ruler-cells span,.matrix tr{transition:none!important}}
@media print{.scene,.readings,.positions,.overflow,.ruler,.matrix,.kase{box-shadow:none;break-inside:avoid}.scene-controls,.kase-filter,.ruler-buttons,[data-replay],[data-matrix-min]{display:none}.say,.notes{display:block!important}}

/* Голос с собеседования: дословная цитата из открытого источника со ссылкой. */
.voice{margin:30px 0;border:2px solid var(--ink);border-left:10px solid var(--sky);background:#fffdf6;box-shadow:5px 5px 0 var(--ink)}
.voice figcaption{display:flex;justify-content:space-between;gap:12px;align-items:center;padding:10px 18px;border-bottom:1px dashed var(--line)}
.voice-badge{font:600 11px var(--pixel);letter-spacing:1px;text-transform:uppercase;color:var(--blue)}
.voice-where{font:500 11px var(--mono);color:var(--muted)}
.voice-line{position:relative;margin:0;padding:14px 22px 4px 58px}
.voice-line:before{content:'"';position:absolute;left:18px;top:6px;font:700 44px/1 Georgia,serif;color:var(--sky)}
.voice-line b{display:block;font:600 10px/1.6 var(--pixel);letter-spacing:1px;text-transform:uppercase;color:var(--ink)}
.voice-line p{margin:2px 0 0;font:italic 17px/1.6 Georgia,serif;color:var(--ink)}
.voice-line .voice-tr{font:13px/1.6 Inter,sans-serif;color:var(--muted);font-style:normal}
.voice-note{margin:10px 22px 0;padding:10px 14px;background:#eff6f9;border-left:3px solid var(--blue);font-size:14px}
.voice footer{padding:12px 22px 14px;font:11px/1.7 var(--mono);color:var(--muted)}
.voice-sources li{font-size:14px;margin-bottom:6px}
@media(max-width:580px){.voice-line{padding:12px 14px 4px 40px}.voice-line:before{left:10px;font-size:34px}.voice-line p{font-size:15px}.voice-note{margin:10px 14px 0}.voice footer{padding:10px 14px}.voice figcaption{flex-wrap:wrap}}
@media print{.voice{box-shadow:none;break-inside:avoid}}
/* Перед кодом: ситуация, вопросы к условию и договорённость. */
.brief{margin:34px 0 20px;border:2px solid var(--ink);background:#fff;box-shadow:6px 6px 0 var(--blue)}
.brief-head{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:4px 16px;padding:12px 20px;background:var(--ink)}
.brief-head b{font:700 20px/1.3 Georgia,serif;color:#fff}.brief-head .eyebrow{order:2;color:var(--sky);font-size:10px}
.brief .kase-label{display:block;margin:0 0 4px}
.brief-sit{margin:18px 20px;padding:12px 18px;background:#e7f2f9;border-left:5px solid var(--blue);font:italic 17px/1.6 Georgia,serif}
.brief-sit .kase-label{font-style:normal}
.brief>.kase-label{margin:0;padding:8px 20px;border-top:2px solid var(--ink);border-bottom:1px solid var(--line);background:#f6fbfe}
.brief-qs{list-style:none;counter-reset:q;margin:0;padding:0}
.brief-qs li{counter-increment:q;display:grid;grid-template-columns:32px minmax(0,.85fr) minmax(0,1.15fr);gap:0 18px;align-items:start;margin:0;padding:13px 20px;border-bottom:1px solid var(--line);transition:background .2s}
.brief-qs li:hover{background:#fbfdff}
.brief-qs li:before{content:counter(q);display:grid;place-items:center;width:30px;height:30px;border:2px solid var(--ink);background:#fff;box-shadow:2px 2px 0 var(--sky);font:700 13px/1 var(--mono);color:var(--ink)}
.brief-qs b{font-size:15px;line-height:1.55;padding-top:3px}
.brief-qs span{font-size:14px;line-height:1.65;color:var(--muted);padding:3px 0 0 16px;border-left:2px dashed var(--light)}
.brief-deal{margin:0;padding:14px 20px;background:#f6fbfe;font-size:15px}
.brief .brief-deal .kase-label{display:inline-block;margin:0 12px 4px 0;padding:2px 9px;background:var(--ink);color:var(--sky)}
.brief[data-anim] li{opacity:0;transform:translateY(8px);transition:opacity .4s,transform .4s,background .2s}
.brief.in li{opacity:1;transform:none}.brief.in li:nth-child(2){transition-delay:.1s}.brief.in li:nth-child(3){transition-delay:.2s}.brief.in li:nth-child(4){transition-delay:.3s}.brief.in li:nth-child(5){transition-delay:.4s}
@media(max-width:850px){.brief-qs li{grid-template-columns:30px minmax(0,1fr);gap:2px 12px}.brief-qs li:before{grid-row:span 2}.brief-qs span{grid-column:2;padding:0;border-left:0}}
@media(max-width:580px){.brief-head{padding:10px 14px}.brief-head b{font-size:18px}.brief-sit{margin:14px;padding:10px 12px;font-size:15px}.brief>.kase-label{padding:8px 14px}.brief-qs li{padding:11px 14px}.brief-qs li:before{width:26px;height:26px}.brief-deal{padding:12px 14px;font-size:14px}}
/* Тренажёр: порядок рассуждения. */
.route{list-style:none;counter-reset:r;padding:0;margin:24px 0;display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px}
.route li{counter-increment:r;border:2px solid var(--ink);background:#fff;padding:12px 14px;box-shadow:3px 3px 0 var(--light)}
.route b{display:block;font:700 17px Georgia,serif}.route b:before{content:counter(r) ' · ';color:var(--blue);font:700 14px var(--pixel)}
.route span{font-size:14px;color:var(--muted)}
/* Какой вопрос меняет решение. */
.pick{border:2px solid var(--ink);background:#fff;box-shadow:5px 5px 0 var(--ink);padding:18px 22px;margin:0 0 26px}
.pick header{display:flex;gap:14px;align-items:center}.pick header p{margin:0;font:700 19px/1.35 Georgia,serif}
.pick-hint{font-size:13px;color:var(--muted);margin:12px 0}
.pick ol{list-style:none;margin:0;padding:0;display:grid;gap:8px}
.pick button{width:100%;text-align:left;font-size:14px;padding:10px 14px;display:flex;justify-content:space-between;gap:10px}
.pick button:after{content:'?';font:700 14px var(--mono);color:var(--blue)}
.pick button[aria-expanded="true"]:after{content:'−'}
.pick-strong button[aria-expanded="true"]{background:#e3f3e8;border-color:#2e7d50}
.pick-mid button[aria-expanded="true"]{background:#fff5d6;border-color:#9a6b00}
.pick-weak button[aria-expanded="true"]{background:#f1f1f1;border-color:var(--muted)}
.pick-why{padding:10px 14px 12px;border:1px solid var(--line);border-top:0;background:#fbfdff;animation:say-in .35s ease both}
.pick-why b{display:inline-block;padding:0 8px;font:600 10px/1.9 var(--pixel);letter-spacing:1px;text-transform:uppercase;color:#fff}
.pick-strong .pick-why b{background:#2e7d50}.pick-mid .pick-why b{background:#9a6b00}.pick-weak .pick-why b{background:var(--muted)}
.pick-why p{margin:4px 0 0;font-size:14px}
/* Одна задача при разных ограничениях. */
.switch{margin:26px 0;border:2px solid var(--ink);background:#fff;box-shadow:5px 5px 0 var(--light)}
.switch figcaption{padding:12px 16px;border-bottom:1px solid var(--line)}
.switch-tabs{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:8px;margin-top:10px}
.switch-tabs button{text-align:left;display:flex;flex-direction:column;gap:2px;padding:8px 10px}
.switch-tabs b{font:600 14px var(--mono)}.switch-tabs small{font-size:11px;line-height:1.4;color:var(--muted)}
.switch-tabs button[aria-pressed="true"]{background:var(--ink);color:#fff;box-shadow:3px 3px 0 var(--blue)}.switch-tabs button[aria-pressed="true"] small{color:var(--light)}
.switch-panel{padding:16px 20px 4px;animation:say-in .35s ease both}.switch-panel .kase-label{display:block}
.switch-cost{display:flex;flex-wrap:wrap;gap:10px}.switch-cost span{padding:4px 10px;background:var(--ink);color:var(--light);font:12px var(--mono)}.switch-cost b{color:#fff}
/* Охота на контрпример. */
.hunt{border:2px solid var(--ink);background:#fff;box-shadow:5px 5px 0 var(--ink);padding:20px 24px;margin:0 0 30px}
.hunt header{display:flex;gap:16px;align-items:center}.hunt h3{margin:0}.hunt header p{margin:4px 0 0;font-size:15px;color:var(--muted)}
.hunt-ask{font-size:14px;margin:4px 0 10px}
.hunt-tries{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:14px}.hunt-tries button{padding:6px 10px}
.hunt-tries button code{background:none;padding:0}
.hunt-tries button.tried-bad{background:#fde8e6;border-color:#b3261e}.hunt-tries button.tried-ok{background:#e3f3e8;border-color:#2e7d50}
.hunt tr.bad td{background:#fde8e6}.hunt tr.bad td:last-child{color:#8c1d15;font-weight:700}.hunt tr.ok td:last-child{color:#2e7d50}
.hunt tr.enter td{animation:say-in .35s ease both}
.hunt-score{font:600 13px var(--mono);margin:8px 0}.hunt-score:empty{display:none}
.hunt-why{border-left:4px solid #b3261e;padding:8px 14px;background:#fffdf2}.hunt-why p{margin:4px 0 0;font-size:14px}
/* Карточка рассуждения. */
.card-think{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));border:2px solid var(--ink);background:#fff;box-shadow:5px 5px 0 var(--blue)}
.card-think>div{padding:16px 18px}.card-think>div+div{border-left:1px dashed var(--ink)}
.card-think ul{margin:8px 0 0;padding-left:18px}.card-think li{font-size:14px;margin:6px 0}
@media(max-width:850px){.route{grid-template-columns:1fr 1fr}.switch-tabs{grid-template-columns:1fr 1fr}.card-think{grid-template-columns:1fr}.card-think>div+div{border-left:0;border-top:1px dashed var(--ink)}}
@media(max-width:580px){.route{grid-template-columns:1fr}.pick,.hunt{padding:16px}.switch-panel{padding:14px}}
@media(prefers-reduced-motion:reduce){.brief[data-anim] li{opacity:1;transform:none;transition:none}.pick-why,.switch-panel,.hunt tr.enter td{animation:none}}
@media print{.brief,.pick,.switch,.hunt,.card-think,.route li{box-shadow:none;break-inside:avoid}.brief li{opacity:1!important;transform:none!important}.pick-why[hidden],.switch-panel[hidden],.hunt [hidden]{display:block!important}.hunt tr[hidden]{display:table-row!important}.switch-tabs,.hunt-tries{display:none}}
/* Встроенный тест: выбор N главных или одного ответа. */
.quiz{margin:30px 0;border:2px solid var(--ink);background:#fff;box-shadow:6px 6px 0 var(--blue)}
.quiz figcaption{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:4px 16px;padding:12px 20px;background:var(--ink)}
.quiz figcaption .eyebrow{order:2;color:var(--sky);font-size:10px}.quiz figcaption b{font:700 20px/1.3 Georgia,serif;color:#fff}
.quiz-task{margin:0;padding:14px 20px;background:#e7f2f9;border-bottom:2px solid var(--ink);font-size:16px}
.quiz-opts{list-style:none;margin:0;padding:0}
.quiz-opts li{margin:0;border-bottom:1px solid var(--line);border-left:4px solid transparent;transition:background .25s,border-color .25s}
.quiz-opts label{display:flex;gap:12px;align-items:flex-start;padding:11px 18px 11px 16px;cursor:pointer;font-size:15px;line-height:1.55}
.quiz-opts label:hover{background:#f6fbfe}
.quiz-opts input{margin-top:4px;width:17px;height:17px;accent-color:var(--ink);flex-shrink:0}
.quiz-opts li:has(input:checked){border-left-color:var(--ink);background:#eef5fb}
.quiz-opts li:has(input:disabled:not(:checked)) label{cursor:default}
.quiz:not(.done) li:has(input:disabled:not(:checked)) label{color:var(--muted)}
.quiz-why{margin:0;padding:0 18px 12px 45px;font-size:14px;line-height:1.6;color:#2b3350;animation:say-in .3s ease both}
.quiz-why:before{display:inline-block;margin:0 10px 0 0;padding:0 8px;font:600 10px/1.9 var(--pixel);letter-spacing:1px;text-transform:uppercase;color:#fff;background:var(--muted)}
.quiz.done li[data-kind="key"]{background:#eaf6ee}.quiz.done li[data-kind="key"] .quiz-why:before{content:'Ключевой';background:#2e7d50}
.quiz.done li[data-kind="ok"]{background:#fff9e8}.quiz.done li[data-kind="ok"] .quiz-why:before{content:'Полезный, но не главный';background:#9a6b00}
.quiz.done li[data-kind="bad"] .quiz-why:before{content:'Не влияет на решение';background:#8c1d15}
.quiz.done li:has(input:checked){border-left-color:var(--ink)}
.quiz.done li[data-kind="bad"]:has(input:checked){background:#fde8e6;border-left-color:#b3261e}
.quiz.done li[data-kind="key"]:not(:has(input:checked)){border-left-color:#2e7d50}
.quiz--one.done li[data-kind="key"] .quiz-why:before{content:'Верный ответ'}.quiz--one.done li[data-kind="bad"] .quiz-why:before{content:'Неверно'}
.quiz.done li:has(input:checked) label span{font-weight:600}
.quiz.done li:has(input:checked) label span:after{content:'ваш выбор';margin-left:10px;padding:0 6px;border:1px solid var(--ink);font:500 10px/1.8 var(--mono);white-space:nowrap}
.quiz-bar{display:flex;flex-wrap:wrap;align-items:center;gap:10px;margin:0;padding:12px 20px;background:#f6fbfe}
.quiz-count{font:500 12px var(--mono);color:var(--muted);margin-right:auto}
.quiz-bar button{padding:8px 16px;font-size:13px}
.quiz-bar button[data-quiz-check]{background:var(--ink);color:#fff;box-shadow:3px 3px 0 var(--blue)}.quiz-bar button:disabled{opacity:.4;cursor:not-allowed;box-shadow:none}
.quiz-result{display:flex;flex-wrap:wrap;align-items:center;gap:10px 16px;margin:0;padding:12px 20px;border-top:2px solid var(--ink);font-size:15px;font-weight:600}
.quiz-meter{display:flex;gap:4px}.quiz-meter i{width:22px;height:10px;border:1px solid var(--ink);background:#fff}.quiz-meter i.on{background:#2e7d50;border-color:#2e7d50}
@media(max-width:580px){.quiz figcaption,.quiz-task,.quiz-bar,.quiz-result{padding-left:14px;padding-right:14px}.quiz figcaption b{font-size:18px}.quiz-opts label{padding:10px 12px}.quiz-why{padding:0 12px 10px 12px}.quiz.done li:has(input:checked) label span:after{display:inline-block;margin:4px 0 0}}
@media(prefers-reduced-motion:reduce){.quiz-why{animation:none}.quiz-opts li{transition:none}}
@media print{.quiz{box-shadow:none;break-inside:avoid}.quiz-bar,.quiz-result{display:none}}
/* Подглавы: номер раздела, линия и отступ отделяют одну мысль главы от другой. */
.chapter-band~article{counter-reset:sec}
.chapter-band~article>section{counter-increment:sec;position:relative;margin:72px 0 0;padding-top:34px;border-top:2px solid var(--ink)}
.chapter-band~article>section:first-child{margin-top:8px}
.chapter-band~article>section:before{content:'';position:absolute;top:-2px;left:0;width:96px;height:6px;background:var(--blue)}
.chapter-band~article>section>h2{display:flex;align-items:baseline;gap:16px;margin-bottom:26px}
.chapter-band~article>section>h2:before{content:'§ ' counter(sec);flex-shrink:0;position:relative;top:-5px;padding:3px 9px;background:var(--ink);color:var(--sky);font:700 13px/1.4 var(--mono);letter-spacing:0}
.chapter-band~article>section>h2+p{font-size:17px}
.chapter-band~article>section:last-child{margin-bottom:24px}
@media(max-width:580px){.chapter-band~article>section{margin-top:52px;padding-top:26px}.chapter-band~article>section>h2{gap:10px}.chapter-band~article>section>h2:before{font-size:11px;padding:2px 7px;top:-3px}.chapter-band~article>section:before{width:64px;height:5px}}
@media print{.chapter-band~article>section{break-before:auto;margin-top:28px;padding-top:14px}.chapter-band~article>section:before{display:none}}

/* Разбор под отсчётом: пока идут 40–60 секунд, summary не раскрывает блок. */
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}
details.locked>summary{color:var(--muted);cursor:default}
details.locked>summary::marker{color:var(--line)}
.wait{font:500 11px var(--mono);letter-spacing:.4px}
.wait.nudge{animation:wait-nudge .45s ease}
@keyframes wait-nudge{0%,100%{color:var(--muted)}35%{color:var(--blue)}}
@media(prefers-reduced-motion:reduce){.wait.nudge{animation:none}}

/* Условие задачи в том виде, в каком его дают: одна строка, крупно и в рамке. */
.definition-line{border-left:5px solid var(--blue);background:#eef4fa;padding:14px 18px;margin:0 0 20px;font-size:17px}
.definition-line b{font-weight:600}