/* ОП.04 · занятие 04 «Замеры времени и памяти».
   Общая визуальная система колод: бумага, чернильные рамки в 2px,
   жёсткая тень со смещением, моноширинный надзаголовок, синий акцент. */
:root{--ink:#0d1830;--paper:#f1f0e8;--blue:#1f5fcc;--teal:#0a7a66;--muted:#57617e;--line:#c7cbd5;--amber:#a3650d;--red:#ae3d37;--mono:ui-monospace,SFMono-Regular,Consolas,monospace;--display:Inter,system-ui,-apple-system,"Segoe UI",sans-serif}
*{box-sizing:border-box}
body{margin:0;height:100dvh;display:grid;grid-template-rows:auto minmax(0,1fr) auto 5px;background:var(--paper);color:var(--ink);font-family:var(--display);font-synthesis:none}
button,input,textarea,select{font:inherit}
button,a,input,textarea{-webkit-tap-highlight-color:transparent}
button,a{touch-action:manipulation}
button{cursor:pointer;border:2px solid var(--ink);background:#fff;border-radius:4px;padding:10px 16px;color:var(--ink);font-weight:650;font-size:16px}
button:hover:not(:disabled){background:#e0ecfa}
button:disabled{cursor:default;opacity:.4}
a{color:var(--blue)}
button:focus-visible,a:focus-visible,input:focus-visible,textarea:focus-visible,pre:focus-visible,summary:focus-visible{outline:3px solid var(--amber);outline-offset:4px}
h1,h2,h3,p{margin:0}
h1{font-size:clamp(30px,3.6vw,54px);line-height:1.1;letter-spacing:-.045em;margin:0 0 13px;max-width:1200px;font-weight:800}
h3{font-size:22px;line-height:1.3}
p{line-height:1.5}
code,pre{font-family:var(--mono)}
input,textarea{border:2px solid var(--line);border-radius:0;background:#fff;padding:9px 12px;min-width:0;color:var(--ink)}
input[aria-invalid=true]{border-color:var(--red);background:#fdefec}
input:disabled{background:#e7e6de;color:#8b93a4}
input[readonly]{background:#e7f1ea;color:#1d5a3f}
textarea{resize:vertical;display:block;width:100%;min-height:85px;margin-top:10px;font-size:17px}

/* Верхняя и нижняя техническая рамка проекта. */
.topbar{min-height:76px;padding:12px 3.2vw;border-bottom:2px solid var(--ink);background:var(--paper);display:flex;align-items:center;justify-content:space-between;gap:16px}
.brand{display:flex;align-items:center;gap:14px;text-decoration:none;color:var(--ink)}
.brand>b{display:grid;place-items:center;flex-shrink:0;width:46px;height:46px;background:var(--blue);color:#fff;border:2px solid var(--ink);box-shadow:3px 3px 0 var(--ink);font:700 17px var(--mono)}
.brand>span{font:700 11px/1.4 var(--mono);letter-spacing:.07em}
.brand small{display:block;font-size:12px;font-weight:500;letter-spacing:0;margin-top:5px;color:var(--muted);font-family:var(--display)}
nav{display:flex;gap:10px;align-items:center;flex-wrap:wrap}
nav button{font-size:13px;padding:8px 12px}
.download{border:2px solid var(--ink);border-radius:4px;background:#e0ecfa;padding:8px 12px;font:650 13px var(--display);text-decoration:none;color:var(--ink)}
.download:hover{background:#cfe1f6}
#fullscreen{font-size:19px;padding:6px 12px}

/* Слайд: одна колонка по центру, тот же ритм, что и в остальных колодах. */
#screen{overflow:auto;outline:none;padding:0 4.4vw;scrollbar-gutter:stable}
.slide{max-width:1520px;margin:0 auto;padding:30px 0 26px;min-height:100%;display:flex;flex-direction:column;justify-content:center;gap:20px}
.slide-heading{flex:none}
.eyebrow{display:flex;justify-content:space-between;gap:12px;margin:0 0 16px;font:700 12px var(--mono);letter-spacing:.07em;text-transform:uppercase;color:var(--blue)}
.eyebrow span:last-child{color:var(--muted);font-weight:500;letter-spacing:.04em}
.intro{font-size:clamp(19px,1.7vw,26px);line-height:1.45;color:var(--muted);margin:0;max-width:1150px}
.slide-body{width:100%;min-width:0}
.split{display:grid;grid-template-columns:minmax(0,1.1fr) minmax(0,1fr);gap:26px;align-items:start}
.content{min-width:0;display:flex;flex-direction:column;gap:16px}
.content:empty{display:none}

/* Карточки, формулы, выводы. */
.cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:16px}
.card{min-width:0;padding:22px;border:2px solid var(--ink);background:#fff;box-shadow:4px 4px 0 var(--ink)}
.label{display:block;font:700 12px var(--mono);letter-spacing:.07em;text-transform:uppercase;color:var(--blue);margin-bottom:10px}
.card>.label{color:var(--blue)}
.formula{font:700 clamp(24px,2.5vw,40px)/1.45 var(--mono);color:var(--ink);letter-spacing:-.02em;margin-top:16px}
.card p{font-size:clamp(18px,1.5vw,23px);line-height:1.5;margin:12px 0 0;color:var(--muted)}
.takeaway{border-left:5px solid var(--blue);background:#dfebf5;padding:16px 20px;margin:0;font-size:clamp(20px,1.8vw,29px);line-height:1.4;font-weight:650}
.note{font-size:clamp(16px,1.25vw,19px);line-height:1.5;color:var(--muted);margin:0}
.hero{gap:32px}
.hero h1{font-size:clamp(40px,5.4vw,82px);max-width:1050px;letter-spacing:-.05em}
.hero .intro{color:var(--ink)}
.hero .card{padding:28px}
.hero .formula{font-size:clamp(28px,3vw,48px)}
.hero .cards{grid-template-columns:1fr 1fr}
.hero .takeaway{background:transparent;border:0;padding:0;font-weight:500}

/* Листинг Python: тёмный экран в такой же чернильной рамке. */
.code-stack{min-width:0;display:grid;gap:16px}
.code-panel{min-width:0;border:2px solid var(--ink);background:#111e32;color:#e9f0ff;overflow:hidden;box-shadow:4px 4px 0 var(--ink)}
.code-head{display:flex;justify-content:space-between;align-items:center;gap:12px;background:var(--ink);padding:10px 16px;font:12px var(--mono);color:#a8d4ff;flex-wrap:wrap}
.code-head>div{display:flex;gap:10px;align-items:center}
.code-head button{border:1px solid #3d5578;border-radius:0;color:#dde8f6;background:#1c2c4a;padding:6px 10px;font:11px var(--mono);font-weight:600}
.code-head button:hover:not(:disabled){background:#2a405c}
.code-head a{color:#a9cff9;font-size:13px;text-decoration:none}
pre{margin:0;padding:18px 20px;overflow:auto;max-height:51vh;font:clamp(15px,1.25vw,20px)/1.55 var(--mono);tab-size:4}
.code-line{display:block;min-height:1.55em;white-space:pre}
.code-line i{display:inline-block;width:2.8em;user-select:none;font:inherit;font-size:.8em;color:#7089a8}
.code-gap{display:block;height:.3em}
.keyword{color:#d2a9ff}
.string{color:#a8dfb3}
.number{color:#ffc988}
.builtin{color:#7fd4ed}
.comment{color:#92a4bb}
.code-label{padding:10px 16px;margin:0;background:#1c2c4a;color:#fff;font:650 15px var(--display)}
.code-pager{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:8px 15px;background:var(--ink);color:#c9d9ed;font:12px var(--mono);text-align:center}
.code-pager small{display:block;margin-top:3px;font-size:10px;color:#9eb5cf}
.code-pager button{background:#1c2c4a;color:#fff;border:1px solid #3d5578;border-radius:0;padding:5px 12px;font-size:12px}
.code-pager button:hover:not(:disabled){background:#2a405c}
.multi-code:not(.experiment){display:flex;flex-direction:column;gap:18px}
.multi-code:not(.experiment) .code-stack{grid-template-columns:1fr 1fr}
.multi-code:not(.experiment) .code-stack,.multi-code:not(.experiment) .content{width:100%}
.multi-code:not(.experiment) .content{flex-direction:row;flex-wrap:wrap}
.multi-code .quiz{flex:1;min-width:280px}
.multi-code pre{max-height:34vh;font-size:clamp(14px,1.13vw,18px)}

/* Вопрос «предскажи»: тот же бланк, что и в других колодах. */
.quiz{border:2px solid var(--ink);background:#fff;padding:19px 22px;margin:0;min-width:0;box-shadow:4px 4px 0 var(--ink)}
.quiz legend{float:left;width:100%;font-size:clamp(18px,1.5vw,23px);font-weight:650;line-height:1.35;padding:0;margin-bottom:16px}
.quiz legend+.options{clear:both}
.options{display:flex;gap:10px;flex-wrap:wrap}
.options button{font:650 19px var(--mono);padding:10px 18px}
.options .correct{background:#e2f0e7;border-color:var(--teal);color:#12523c;opacity:1}
.options .incorrect{background:#fbe9e5;border-color:var(--red);color:#8f322a;opacity:1}
.feedback{padding:14px 17px;margin:16px 0 0;border-left:4px solid var(--blue);background:#dfebf5;font-size:18px;line-height:1.5}
.hint{font-size:13px;line-height:1.5;color:var(--muted);margin:8px 0 0}

/* Лабораторный журнал: прогноз → запуск → таблица → вывод. */
.lab{background:#fff;border:2px solid var(--ink);box-shadow:4px 4px 0 var(--ink);padding:22px}
.lab-heading{display:flex;gap:10px;justify-content:space-between;align-items:baseline}
.autosave{font:11px var(--mono);color:var(--teal)}
.prediction-label{display:block;font-weight:650;font-size:17px;line-height:1.45;margin:2px 0 9px}
.prediction-row{display:flex;gap:8px}
.prediction-row input{width:100%;font-size:15px}
.prediction-row button{font-size:13px;flex-shrink:0;padding:8px 12px}
.run-step{padding:16px 0;border-bottom:2px solid var(--line);margin-bottom:16px}
.muted{opacity:.6}
.command{display:flex;flex-wrap:wrap;justify-content:space-between;gap:8px;font-size:13px}
.command code{background:#e6eef8;border:1px solid var(--line);padding:7px 9px}
.command a{align-self:center}
.input-guide{font-size:15px;line-height:1.5;margin:0 0 12px;color:var(--muted)}
.measurement-guide{padding:15px 18px;background:#dfebf5;border-left:4px solid var(--blue);font-size:16px;line-height:1.5;margin:12px 0 0}
.measurement-guide p{margin:8px 0 0}
.memory-fields{display:flex;gap:12px;margin-top:12px;font-size:13px}
.memory-fields label{width:50%}
.memory-fields input{width:100%;margin-top:5px}
#explain{width:100%;font-size:14px;margin-top:16px}
#explanation{margin-top:15px;border-top:2px solid var(--line);padding-top:13px;font-size:17px;line-height:1.5}
#explanation p{margin-top:0}
#explanation label{font-weight:650}

/* Таблицы. */
.table-wrap{overflow:auto}
table{border-collapse:collapse;width:100%;text-align:left;background:#fff}
th,td{padding:9px;border:1px solid var(--line);font-size:14px;line-height:1.4}
th{font-weight:700}
thead th{background:#e4ebf4;color:var(--ink);white-space:nowrap;font:700 12px var(--mono);letter-spacing:.05em;text-transform:uppercase}
.results input{width:100%;min-width:85px;max-width:170px;padding:7px 9px;font:14px var(--mono)}
.results th:first-child{max-width:160px}
.ratio{white-space:nowrap;font:12px var(--mono);color:var(--blue)}
.summary-table{border:2px solid var(--ink)}
.summary-table th,.summary-table td{padding:9px 20px;font-size:clamp(15px,1.3vw,20px)}
.summary-table td:not(:first-child){font-family:var(--mono)}
.summary-table tbody tr:nth-child(even){background:#eef2f7}
.primary{background:var(--blue);border-color:var(--blue);color:#fff}
.primary:hover:not(:disabled){background:#174ba7;color:#fff}

/* Графики: модель и собственные замеры. */
#measured-chart{margin-top:14px}
#measured-chart:empty{display:none}
svg{display:block;width:100%;overflow:visible}
svg text{font:12px var(--mono);fill:var(--muted)}
.gridline{stroke:#cfd5df;stroke-width:1}
.axis{stroke:var(--ink);stroke-width:2}
.legend{display:flex;justify-content:center;gap:24px;font:14px var(--mono);flex-wrap:wrap}
.graph-controls{display:flex;align-items:center;gap:30px;flex-wrap:wrap;font-size:18px}
.graph-controls .legend{display:none}
.graph-controls input{flex:1;max-width:500px;accent-color:var(--blue);border:0;padding:0}
output{font:700 22px var(--mono);color:var(--blue);margin-left:10px}
#model-chart{max-width:1050px;width:100%;align-self:center;border:2px solid var(--ink);background:#fff;box-shadow:4px 4px 0 var(--ink);padding:16px}
#model-chart svg{max-height:37vh}
.model-stats{display:flex;justify-content:space-around;font:20px var(--mono);padding-top:15px}
.model-stats span:nth-child(1){color:#1d64c8}
.model-stats span:nth-child(2){color:#10927e}
.model-stats span:nth-child(3){color:#a26400}
.bars{display:grid;gap:7px}
.bars>div{display:grid;grid-template-columns:90px 1fr 80px;align-items:center;font:11px var(--mono);gap:8px}
.bars b{height:11px;background:var(--blue);border:1px solid var(--ink)}

/* Схемы: цепочка шагов, шкала времени, полоса идентификаторов. */
.flow{display:grid;grid-template-columns:repeat(auto-fit,minmax(170px,1fr));gap:16px}
.flow>div{position:relative;background:#fff;border:2px solid var(--ink);padding:18px;font-size:20px;line-height:1.4}
.flow>div:not(:last-child)::after{content:'→';position:absolute;right:-16px;top:40%;color:var(--blue);z-index:1}
.flow span{display:block;font:700 12px var(--mono);letter-spacing:.06em;text-transform:uppercase;color:var(--blue);margin-bottom:14px}
.slide-body .flow{grid-template-columns:repeat(4,1fr)}
.split .flow{grid-template-columns:repeat(2,minmax(0,1fr))}
/* Стрелка не выходит за край строки, когда цепочка переносится. */
.slide-body .flow>div:nth-child(4n)::after,.split .flow>div:nth-child(2n)::after{display:none}
.timeline{display:flex;justify-content:space-between;gap:20px;align-items:center;background:var(--ink);color:#fff;padding:22px 26px;font:18px var(--mono)}
.timeline span{color:#9dc4ee}
.mini-flow{display:flex;gap:20px;font:15px/1.7 var(--mono);color:var(--blue)}
.id-strip{display:flex;gap:14px;margin-bottom:15px;flex-wrap:wrap}
.id-strip span{background:#fff;border:2px solid var(--ink);padding:22px;font:24px var(--mono)}
.id-strip span:nth-child(4){background:var(--blue);color:#fff;box-shadow:4px 4px 0 var(--ink)}

/* Чек-лист самопроверки и финальная строка. */
.checklist{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.checklist label{display:flex;align-items:center;gap:16px;background:#fff;border:2px solid var(--line);padding:17px;font-size:clamp(18px,1.4vw,23px);cursor:pointer}
.checklist input{width:22px;height:22px;accent-color:var(--teal);flex-shrink:0;border:0;padding:0}
.checklist label:has(:checked){background:#e7f1ea;border-color:var(--teal)}
.closing{font-size:clamp(24px,2.7vw,42px);color:var(--ink);font-weight:800;letter-spacing:-.03em;margin:0}

/* Подвал: фазы занятия и навигация. */
footer{display:flex;justify-content:space-between;align-items:center;gap:15px;border-top:2px solid var(--ink);padding:12px 3.2vw;background:var(--paper)}
#phase{display:flex;align-items:center;gap:8px;color:var(--muted);font:12px var(--mono)}
#phase span{display:flex;align-items:center;gap:7px;padding:6px 8px}
#phase i{font:11px var(--mono);border:1px solid var(--line);background:#fff;padding:3px 7px;font-style:normal}
#phase .active{color:var(--blue);background:#dfebf5;border:2px solid var(--blue);font-weight:700;padding:4px 8px}
#phase .active i{background:var(--blue);color:#fff;border-color:var(--blue)}
#phase b{font-weight:400;color:var(--line)}
.navigation{display:flex;align-items:center;gap:16px;flex-wrap:nowrap}
.navigation button{font-size:20px;padding:6px 18px;white-space:nowrap}
.navigation span{font:13px var(--mono);white-space:nowrap}
.progress{background:#cdd4df}
.progress div{height:5px;background:var(--blue);transition:width .2s}

/* Оглавление и служебные элементы. */
dialog{border:2px solid var(--ink);border-radius:0;box-shadow:7px 7px 0 var(--ink);padding:28px;max-width:900px;width:90vw;max-height:85vh;color:var(--ink);background:var(--paper)}
dialog::backdrop{background:#0d1830b3}
.dialog-head{display:flex;align-items:center;justify-content:space-between;gap:20px;margin-bottom:18px}
.dialog-head h2{margin:0;font-size:30px;letter-spacing:-.035em}
dialog>p{color:var(--muted);font-size:18px}
#outline-list{display:grid;grid-template-columns:1fr 1fr;gap:25px;margin-top:22px}
#outline-list h3{font-size:17px;margin-bottom:10px}
#outline-list h3 small{display:block;font:12px var(--mono);color:var(--muted);margin-top:5px}
#outline-list button{display:flex;gap:12px;text-align:left;width:100%;padding:9px 0;border:0;background:none;font-size:14px;font-weight:500}
#outline-list button:hover{background:none;text-decoration:underline}
#outline-list button span{color:var(--blue);font-family:var(--mono)}
.dialog-actions{display:flex;flex-wrap:wrap;gap:15px;align-items:center;margin-top:25px;font-size:14px}
.toast{position:fixed;bottom:96px;left:50%;transform:translateX(-50%);background:var(--ink);color:#fff;padding:15px 22px;z-index:50;max-width:90vw;font-size:16px}
[hidden]{display:none!important}

@media(min-width:1500px){.lab{padding:26px}.lab .hint{font-size:14px}.prediction-label{font-size:19px}.results input{font-size:17px}.results th,.results td{font-size:15px}.code-head{font-size:14px}pre{line-height:1.6}.slide{gap:24px}.eyebrow{font-size:13px}}
@media(min-width:901px){pre{font-size:18px}.multi-code pre{font-size:17px}}
@media(max-height:800px) and (min-width:901px){.slide{justify-content:flex-start;gap:15px;padding-top:20px}h1{font-size:38px}.intro{font-size:19px}.eyebrow{margin-bottom:10px}.card{padding:17px}.card p{font-size:18px}.formula{font-size:30px}pre{font-size:15px}.takeaway{font-size:21px;padding:13px 17px}.summary-table th,.summary-table td{padding:7px 16px;font-size:16px}.checklist label{padding:13px;font-size:18px}.flow>div{padding:14px}.lab{padding:17px}}
@media(max-width:900px){.topbar{padding:12px 18px}.brand>span{display:none}nav button{font-size:12px;padding:8px 10px}.download{font-size:12px;padding:8px 10px}#screen{padding:0 22px}.slide{justify-content:flex-start;padding:24px 0;gap:20px}.split{grid-template-columns:1fr}.hero .cards{grid-template-columns:1fr 1fr}.hero .card{padding:20px}.hero h1{font-size:46px}.cards{grid-template-columns:repeat(auto-fit,minmax(220px,1fr))}.slide-body .flow,.split .flow{grid-template-columns:1fr 1fr}.flow>div::after{display:none}pre{max-height:none;font-size:16px}.multi-code:not(.experiment) .code-stack{grid-template-columns:1fr}.multi-code pre{max-height:none;font-size:16px}#phase{gap:3px;font-size:10px}#phase i{display:none}#phase span{padding:4px}#phase b{display:none}.navigation{gap:8px}.navigation button{padding:5px 12px;font-size:17px}.checklist{grid-template-columns:1fr}.eyebrow span:last-child{display:none}.summary-table th,.summary-table td{font-size:14px;padding:9px}.summary-table{display:block;overflow:auto}.lab{padding:16px}.toast{bottom:80px}#outline-list{grid-template-columns:1fr}footer{padding:12px 18px}}
@media(max-width:500px){.hero .cards,.slide-body .flow,.split .flow{grid-template-columns:1fr}.hero h1{font-size:39px}.brand>b{width:38px;height:38px;font-size:14px}.download span{font-size:0}.download span:after{content:'Файлы';font-size:12px}.prediction-row{flex-direction:column}.lab-heading{display:block}.autosave{display:block;margin-bottom:10px}#phase span:not(.active){display:none}.card{padding:18px}.id-strip{gap:7px}.id-strip span{padding:13px;font-size:19px}.timeline{font-size:12px;padding:14px}.navigation span{font-size:12px}#screen{padding:0 16px}.quiz{padding:16px}.legend{gap:12px}.memory-fields{flex-direction:column}.memory-fields label{width:100%}}
@media(prefers-reduced-motion:reduce){*,*::before,*::after{scroll-behavior:auto!important;transition:none!important}}
@media print{body{height:auto;display:block;background:#fff}.topbar,footer,.progress,dialog,.toast,.code-head button,.code-pager,#explain{display:none!important}#screen{overflow:visible;padding:0}.slide{min-height:0;padding:16px 0;gap:14px;max-width:none}h1{font-size:28px}.intro,.card p{font-size:16px}.card,.lab,.quiz,.code-panel,#model-chart,.summary-table{box-shadow:none}pre{max-height:none;font-size:13px}#explanation{display:block!important}}