/* Практикум ElbrusWay — оформление 30.09.2026. Язык приложения: светлая/тёмная тема (html.light), градиент бренда
   #7c3aed → #3b82f6 только на главных действиях и метке «Новое», карточки с обложками. */
:root{
  --ink:255,255,255;
  --bg:#05080f;--bg2:#0a101d;--card:#0d1424;--text:#eef2ff;--muted:#9aa6bd;--line:rgba(255,255,255,.1);--soft:rgba(255,255,255,.055);
  --primary:#7f9bff;--grad:linear-gradient(135deg,#7c3aed,#3b82f6);--ok:#34d399;--ok-soft:rgba(52,211,153,.12);
  --shadow:0 18px 50px rgba(0,0,0,.35);--r:18px;--ease:cubic-bezier(.23,1,.32,1);
  color-scheme:dark;
}
html.light{
  --ink:16,24,40;
  --bg:#f4f5f9;--bg2:#ffffff;--card:#ffffff;--text:#101828;--muted:#5b6880;--line:rgba(16,24,40,.11);--soft:rgba(16,24,40,.045);
  --primary:#2f5bff;--ok:#047857;--ok-soft:rgba(4,120,87,.1);
  --shadow:0 14px 40px rgba(16,24,40,.1);
  color-scheme:light;
}
*{box-sizing:border-box}
html{scroll-padding-top:84px;-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--text);font:16px/1.6 -apple-system,BlinkMacSystemFont,"SF Pro Text","Segoe UI",Roboto,Arial,sans-serif;overflow-x:hidden}
body::before{content:"";position:fixed;inset:0;z-index:-1;pointer-events:none;background:radial-gradient(ellipse 80% 50% at 12% -10%,rgba(124,58,237,.16),transparent 60%),radial-gradient(ellipse 60% 40% at 90% 0%,rgba(59,130,246,.12),transparent 60%)}
html.light body::before{background:radial-gradient(ellipse 80% 50% at 12% -10%,rgba(124,58,237,.09),transparent 60%),radial-gradient(ellipse 60% 40% at 90% 0%,rgba(59,130,246,.08),transparent 60%)}
a{color:inherit;text-underline-offset:4px}
button,input{font:inherit;color:inherit}
button,a,input,summary{touch-action:manipulation}
button{cursor:pointer}
img,video{max-width:100%;display:block}
h1,h2,h3{margin:0;line-height:1.12;letter-spacing:-.03em;text-wrap:balance}
h1{font-size:clamp(34px,5.4vw,58px);font-weight:750}
h2{font-size:clamp(24px,3vw,34px);font-weight:700}
h3{font-size:19px;line-height:1.25;font-weight:650;letter-spacing:-.015em}
p{margin:0 0 14px}
[hidden]{display:none!important}
a:focus-visible,button:focus-visible,input:focus-visible,summary:focus-visible,.rail:focus-visible{outline:3px solid var(--primary);outline-offset:3px;border-radius:10px}
.skip{position:fixed;left:16px;top:-90px;background:var(--text);color:var(--bg);padding:12px 16px;border-radius:10px;z-index:60}
.skip:focus{top:16px}

/* Шапка */
.ac-top{position:sticky;top:0;z-index:40;background:rgba(5,8,15,.82);-webkit-backdrop-filter:blur(20px) saturate(170%);backdrop-filter:blur(20px) saturate(170%);border-bottom:1px solid var(--line)}
html.light .ac-top{background:rgba(244,245,249,.86)}
.ac-top-in,main,.foot-in{max-width:1180px;margin:0 auto;padding-left:max(20px,env(safe-area-inset-left));padding-right:max(20px,env(safe-area-inset-right))}
.ac-top-in{display:flex;align-items:center;justify-content:space-between;gap:12px;min-height:64px}
.ac-top nav{display:flex;align-items:center;gap:8px}
.brand{display:inline-flex;align-items:center;gap:10px;text-decoration:none;font-size:16px;font-weight:750;letter-spacing:-.03em;min-height:44px}
.brand img{border-radius:8px}
.brand small{display:block;font-size:9px;font-weight:650;letter-spacing:.16em;color:var(--muted);margin-top:1px}
.nav-link{display:inline-flex;align-items:center;min-height:44px;padding:0 10px;text-decoration:none;font-size:14px;font-weight:600;color:var(--muted)}
.icon-btn{min-height:40px;padding:0 12px;border:1px solid var(--line);border-radius:999px;background:var(--soft);font-size:12px;font-weight:600}

/* Кнопки, чипы, метки */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:48px;padding:12px 20px;border:1px solid var(--line);border-radius:14px;background:var(--soft);color:var(--text);font-size:15px;font-weight:650;text-decoration:none;transition:transform 140ms var(--ease),border-color 160ms ease,filter 160ms ease}
.btn.primary{background:var(--grad);border-color:transparent;color:#fff;box-shadow:0 8px 24px rgba(124,58,237,.3)}
.btn.sm{min-height:40px;padding:8px 16px;font-size:13px;border-radius:999px}
.btn:active,.chip:active,.icon-btn:active{transform:scale(.97)}
button:disabled{cursor:wait;opacity:.6}
.eyebrow{margin:0 0 12px;font-size:11px;font-weight:700;letter-spacing:.14em;text-transform:uppercase;color:var(--primary)}
.fine{font-size:13px;color:var(--muted)}
.lead{font-size:18px;line-height:1.55;color:var(--muted);max-width:600px;text-wrap:pretty}
.badge{display:inline-flex;align-items:center;min-height:24px;padding:3px 10px;border-radius:999px;font-size:11px;font-weight:700;letter-spacing:.02em;white-space:nowrap}
.badge.new{background:var(--grad);color:#fff}
.badge.done{background:#047857;color:#fff}
.badge.play{background:rgba(5,8,15,.66);color:#fff;-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px)}
.badge.inline{vertical-align:middle;margin-right:6px;letter-spacing:.02em;text-transform:none}
.tags{display:flex;flex-wrap:wrap;gap:6px}
.tags span{padding:4px 10px;border:1px solid var(--line);border-radius:999px;background:var(--soft);font-size:12px;font-weight:550;color:var(--muted);white-space:nowrap}
.tags.big span{font-size:13px;padding:6px 12px}
.pill{padding:5px 11px;border-radius:999px;background:rgba(124,58,237,.16);color:var(--primary);font-size:12px;font-weight:650}
html.light .pill{background:rgba(47,91,255,.1)}

/* Главная: первый экран */
.hero{display:grid;grid-template-columns:minmax(0,1.25fr) minmax(0,.75fr);align-items:center;gap:48px;padding:56px 0 40px}
.hero h1{margin-bottom:18px}
.hero-actions{display:flex;flex-wrap:wrap;gap:10px;margin:26px 0 12px}
.stats{display:flex;gap:28px;margin:26px 0 0}
.stats div{min-width:0}
.stats dt{font-size:30px;font-weight:750;letter-spacing:-.03em;line-height:1.1;font-variant-numeric:tabular-nums}
.stats dd{margin:2px 0 0;font-size:13px;color:var(--muted)}
.hero-phone{justify-self:center;width:min(100%,300px);margin:0;border:1px solid var(--line);border-radius:28px;background:var(--card);padding:8px;box-shadow:var(--shadow)}
.hero-phone video{width:100%;aspect-ratio:9/16;object-fit:cover;border-radius:21px;background:#05080f}
.hero-phone figcaption{padding:12px 10px 8px;font-size:13px;line-height:1.4}
.hero-phone figcaption b{display:block}
.hero-phone figcaption a{color:var(--primary)}

/* Секции */
.block{padding:44px 0}
.block-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:22px}
.block-head .eyebrow{margin-bottom:8px}
.block-sub{max-width:420px;margin:0;font-size:14px;color:var(--muted)}

/* Лента «Новое» */
.rail{display:flex;gap:14px;overflow-x:auto;scroll-snap-type:x mandatory;padding:4px 20px 14px;margin:0 -20px;scrollbar-width:thin;-webkit-overflow-scrolling:touch}
.rail-card{position:relative;flex:0 0 min(64vw,236px);aspect-ratio:3/4;border-radius:var(--r);overflow:hidden;scroll-snap-align:start;text-decoration:none;color:#fff;background:#0d1424;border:1px solid var(--line);transition:transform 160ms var(--ease)}
.rail-card img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover}
.rail-card.contain img{object-fit:contain;padding:18px 18px 96px;background:#e9ebf2}
.rail-card .badge{position:absolute;left:12px;top:12px}
.rail-text{position:absolute;left:0;right:0;bottom:0;padding:56px 14px 14px;background:linear-gradient(180deg,transparent,rgba(3,6,14,.92) 62%)}
.rail-text small{display:block;font-size:11px;opacity:.82;margin-bottom:4px}
.rail-text b{display:block;font-size:15px;line-height:1.25;font-weight:650;letter-spacing:-.01em}

/* Прогресс, фильтры */
.progress-card{flex:0 1 340px;min-width:0;padding:12px 14px;border:1px solid var(--line);border-radius:14px;background:var(--card)}
.progress-line{display:flex;align-items:center;justify-content:space-between;gap:12px;font-size:13px;font-weight:600}
.progress-line span{flex:0 0 auto;white-space:nowrap}
.progress-line a{color:var(--primary);text-decoration:none;min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.bar{height:6px;margin-top:9px;border-radius:6px;background:var(--soft);overflow:hidden}
.bar i{display:block;height:100%;width:0;border-radius:6px;background:var(--grad);transition:width 300ms var(--ease)}
.chips{display:flex;gap:8px;overflow-x:auto;padding:2px 20px 10px;margin:0 -20px;scrollbar-width:none}
.chips::-webkit-scrollbar{display:none}
.chip{flex:0 0 auto;min-height:40px;padding:8px 15px;border:1px solid var(--line);border-radius:999px;background:var(--soft);color:var(--muted);font-size:13px;font-weight:600;white-space:nowrap;transition:transform 140ms var(--ease),background-color 160ms ease,color 160ms ease}
.chip.active{background:var(--grad);border-color:transparent;color:#fff;box-shadow:0 4px 14px rgba(124,58,237,.3)}
.search{display:block;margin:8px 0 6px;font-size:12px;font-weight:650;letter-spacing:.06em;text-transform:uppercase;color:var(--muted)}
.search input{display:block;width:100%;min-height:50px;margin-top:8px;padding:12px 16px;border:1px solid var(--line);border-radius:14px;background:var(--card);font-size:16px;font-weight:400;letter-spacing:0;text-transform:none;color:var(--text)}
.search input::placeholder{color:var(--muted);opacity:.8}

/* Карточки уроков */
.lesson-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px;margin:14px 0 18px}
.lesson-card{position:relative;display:flex;flex-direction:column;min-width:0;border:1px solid var(--line);border-radius:var(--r);background:var(--card);overflow:hidden;transition:transform 160ms var(--ease),border-color 160ms ease,box-shadow 160ms ease}
.card-cover{position:relative;aspect-ratio:16/10;background:#0d1424;overflow:hidden}
.card-cover img{width:100%;height:100%;object-fit:cover;object-position:center 28%}
.card-cover.contain img{object-fit:contain;padding:10px;background:#e9ebf2}
.card-cover .badge{position:absolute;top:10px}
.card-cover .badge.new{left:10px}
.card-cover .badge.done{right:10px}
.card-cover .badge.play{left:10px;top:auto;bottom:10px}
.card-body{display:flex;flex-direction:column;gap:8px;flex:1;padding:16px 16px 18px}
.card-kicker{margin:0;font-size:11px;font-weight:700;letter-spacing:.1em;text-transform:uppercase;color:var(--primary)}
.lesson-card h3 a{text-decoration:none}
.lesson-card h3 a::after{content:"";position:absolute;inset:0;border-radius:var(--r)}
.card-desc{margin:0;font-size:14px;line-height:1.5;color:var(--muted);display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden}
.card-body .tags{margin-top:auto;padding-top:6px}
.lesson-card.is-done{border-color:var(--ok)}
.empty{padding:26px;border:1px dashed var(--line);border-radius:var(--r);text-align:center;color:var(--muted)}

/* Банк идей */
.bank{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}
.bank-card{display:flex;flex-direction:column;gap:4px;min-width:0;padding:22px;border:1px solid var(--line);border-radius:var(--r);background:var(--card);text-decoration:none;transition:transform 160ms var(--ease),border-color 160ms ease}
.bank-num{font-size:40px;line-height:1;font-weight:780;letter-spacing:-.04em;font-variant-numeric:tabular-nums}
.bank-card b{font-size:16px;font-weight:650}
.bank-card p{margin:8px 0 14px;font-size:14px;line-height:1.5;color:var(--muted)}
.bank-card i{margin-top:auto;font-style:normal;font-size:14px;font-weight:650;color:var(--primary)}

/* Как устроен урок */
.how-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:16px;margin:0;padding:0;list-style:none;counter-reset:how}
.how-grid li{counter-increment:how;padding:18px;border:1px solid var(--line);border-radius:var(--r);background:var(--soft)}
.how-grid li::before{content:counter(how,decimal-leading-zero);display:block;margin-bottom:10px;font-size:12px;font-weight:700;letter-spacing:.1em;color:var(--primary)}
.how-grid b{display:block;margin-bottom:6px;font-size:16px}
.how-grid span{font-size:14px;line-height:1.5;color:var(--muted)}
.method{display:grid;grid-template-columns:1fr 1fr;gap:48px;border-top:1px solid var(--line);margin-top:20px}
.method p{color:var(--muted);font-size:15px}
summary{cursor:pointer;min-height:44px;display:flex;align-items:center;font-weight:650}
details ul{padding-left:20px;color:var(--muted);font-size:14px}

/* Урок */
.breadcrumb{display:flex;flex-wrap:wrap;gap:10px;padding:22px 0 6px;font-size:13px;color:var(--muted)}
.breadcrumb a{color:var(--primary);text-decoration:none;min-height:32px;display:inline-flex;align-items:center}
.breadcrumb span{display:inline-flex;align-items:center}
.lesson-hero{display:grid;grid-template-columns:minmax(0,1.2fr) minmax(0,.8fr);gap:44px;align-items:start;padding:18px 0 28px}
.lesson-title{font-size:clamp(30px,4.4vw,48px);margin-bottom:16px}
.lesson-hero .tags{margin:18px 0}
.outcome{padding:16px 18px;border:1px solid var(--line);border-left:4px solid #7c3aed;border-radius:14px;background:var(--card)}
.outcome p{margin:4px 0 0;color:var(--muted)}
.demo{margin:0;border:1px solid var(--line);border-radius:22px;background:var(--card);overflow:hidden;box-shadow:var(--shadow)}
.demo video{width:100%;max-height:560px;background:#05080f;object-fit:contain}
.demo img{width:100%;max-height:520px;object-fit:cover}
.demo.contain img{object-fit:contain;padding:22px;background:#e9ebf2}
.demo audio{display:block;width:calc(100% - 24px);margin:12px}
.demo figcaption{padding:12px 16px 14px;font-size:13px;line-height:1.5;color:var(--muted)}
.lesson-layout{display:grid;grid-template-columns:minmax(0,780px) 230px;gap:56px;justify-content:space-between}
.lesson-layout article{min-width:0}
.lesson-layout section{margin:0 0 44px}
.lesson-layout h2{margin-bottom:18px}
.steps{margin:0;padding:0;list-style:none}
.step{position:relative;display:flex;gap:16px;padding:0 0 22px}
.step:not(:last-child)::before{content:"";position:absolute;left:17px;top:40px;bottom:2px;width:2px;background:var(--line)}
.step-number{flex:0 0 36px;height:36px;display:grid;place-items:center;border-radius:50%;background:var(--grad);color:#fff;font-size:15px;font-weight:700}
.step h3{margin:5px 0 6px}
.step p{margin:0;color:var(--muted)}
.budget{padding:22px;border:1px solid var(--line);border-radius:var(--r);background:var(--card)}
.budget h2{font-size:24px;margin-bottom:10px}
.budget p{color:var(--muted)}
.budget p:last-child{margin-bottom:0}
.prompt-card{margin:18px 0;padding:20px;border:1px solid var(--line);border-radius:var(--r);background:var(--card)}
.prompt-head{display:flex;align-items:center;justify-content:space-between;gap:10px;margin-bottom:14px;font-size:12px;color:var(--muted)}
.prompt-card h3{margin-bottom:8px}
.needs{font-size:14px;color:var(--muted);margin-bottom:10px}
.needs strong{color:var(--text)}
.tested{color:var(--ok);font-size:13px;font-weight:600}
pre{margin:14px 0;padding:16px;max-height:420px;overflow:auto;white-space:pre-wrap;overflow-wrap:anywhere;border:1px solid var(--line);border-radius:12px;background:var(--soft);color:var(--text);font:13.5px/1.65 ui-monospace,SFMono-Regular,Menlo,Consolas,monospace}
.actions{display:flex;flex-wrap:wrap;gap:10px}
.download{display:inline-flex;align-items:center;min-height:44px;color:var(--primary);font-size:14px;font-weight:600}
.pitfalls{margin:0 0 26px;padding-left:22px;color:var(--muted)}
.pitfalls li{margin:10px 0}
.checklist{margin-top:10px;border:1px solid var(--line);border-radius:14px;background:var(--card);padding:4px 16px}
.checklist label,.quiz label{display:flex;align-items:flex-start;gap:12px;min-height:48px;padding:12px 0;cursor:pointer}
.checklist label+label{border-top:1px solid var(--line)}
.checklist input,.quiz input{flex:0 0 20px;width:20px;height:20px;margin:2px 0 0;accent-color:#6d5cf0}
.quiz{margin:26px 0 0;padding:18px 20px;border:1px solid var(--line);border-radius:var(--r);background:var(--card);min-width:0}
.quiz legend{padding:0 8px;font-weight:650}
.quiz .btn{margin-top:8px}
#quiz-result{margin:12px 0 0;font-size:14px;color:var(--muted)}
#quiz-result.ok{color:var(--ok)}
.finish{padding:22px;border:1px solid var(--line);border-radius:var(--r);background:var(--soft)}
.finish h2{font-size:24px;margin-bottom:10px}
.finish p{color:var(--muted)}
#complete[aria-pressed=true]{background:var(--ok-soft);border-color:var(--ok);color:var(--ok);box-shadow:none}
.lesson-nav{display:grid;grid-template-columns:1fr 1fr;gap:12px;padding:0 0 56px}
.nav-card{display:block;min-width:0;padding:14px 16px;border:1px solid var(--line);border-radius:14px;background:var(--card);text-decoration:none;transition:transform 160ms var(--ease),border-color 160ms ease}
.nav-card small{display:block;margin-bottom:4px;font-size:12px;color:var(--muted)}
.nav-card b{display:block;font-size:14px;line-height:1.35;font-weight:650}
.nav-card.next{text-align:right}
aside{position:sticky;top:88px;align-self:start;font-size:13px;color:var(--muted)}
aside>a{display:flex;align-items:center;min-height:40px;text-decoration:none;color:var(--text)}
aside hr{border:0;border-top:1px solid var(--line);margin:16px 0}

/* Подвал, уведомление */
footer{border-top:1px solid var(--line);margin-top:24px;padding:26px 0 max(28px,env(safe-area-inset-bottom));font-size:13px;color:var(--muted)}
.foot-in{display:flex;align-items:center;justify-content:space-between;gap:20px;flex-wrap:wrap}
.foot-in p{margin:0}
footer nav{display:flex;gap:18px;flex-wrap:wrap}
footer nav a{min-height:44px;display:inline-flex;align-items:center}
#notice{position:fixed;left:50%;bottom:max(22px,env(safe-area-inset-bottom));transform:translateX(-50%);z-index:70;max-width:calc(100% - 32px);padding:12px 18px;border-radius:12px;background:var(--text);color:var(--bg);font-size:14px;font-weight:600;box-shadow:var(--shadow)}
#notice:empty{display:none}

@media(hover:hover) and (pointer:fine){
  .btn:hover{filter:brightness(1.07)}
  .lesson-card:hover,.bank-card:hover,.nav-card:hover,.rail-card:hover{transform:translateY(-3px);border-color:rgba(124,58,237,.55)}
  .lesson-card:hover{box-shadow:var(--shadow)}
  .nav-link:hover,aside>a:hover{color:var(--primary)}
  .chip:hover{color:var(--text)}
}
@media(max-width:980px){
  .lesson-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .how-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .lesson-layout{grid-template-columns:minmax(0,1fr);gap:0}
  aside{display:none}
  .hero{gap:28px}
}
@media(max-width:720px){
  html{scroll-padding-top:72px}
  .ac-top-in{min-height:56px}
  .nav-link{display:none}
  .hero{grid-template-columns:minmax(0,1fr);padding:30px 0 20px;gap:26px}
  .lead{font-size:16.5px}
  .hero-actions .btn{flex:1 1 auto}
  .stats{gap:12px;justify-content:space-between}
  .stats dt{font-size:25px}
  .stats dd{font-size:12px}
  .hero-phone{width:min(100%,260px)}
  .block{padding:30px 0}
  .block-head{display:block;margin-bottom:16px}
  .block-sub{margin-top:10px}
  .progress-card{margin-top:14px}
  .lesson-grid,.bank,.method{grid-template-columns:minmax(0,1fr)}
  /* На телефоне уроки — компактным списком: обложка слева, текст справа (18 больших карточек = 12 экранов прокрутки) */
  .lesson-grid{gap:10px}
  .lesson-card{flex-direction:row;align-items:stretch}
  .card-cover{flex:0 0 108px;aspect-ratio:auto;min-height:124px}
  .card-cover img{position:absolute;inset:0;object-position:center 22%}
  .card-cover .badge{min-height:20px;padding:2px 7px;font-size:10px;top:7px}
  .card-cover .badge.new{left:7px}
  .card-cover .badge.done{left:7px;right:auto;top:auto;bottom:7px}
  .card-cover .badge.play{display:none}
  .card-body{padding:12px 14px;gap:5px}
  .card-kicker{font-size:10px}
  .lesson-card h3{font-size:16px}
  .card-desc{font-size:13px;-webkit-line-clamp:2}
  .card-body .tags{padding-top:4px;gap:5px}
  .card-body .tags span{font-size:11px;padding:3px 8px}
  .method{gap:8px}
  .how-grid{grid-template-columns:minmax(0,1fr);gap:10px}
  .lesson-hero{grid-template-columns:minmax(0,1fr);gap:22px;padding-top:8px}
  .demo video{max-height:70vh}
  .lesson-layout section{margin-bottom:34px}
  .prompt-card,.budget,.finish{padding:16px}
  .actions .btn{flex:1 1 auto}
  .lesson-nav{grid-template-columns:minmax(0,1fr)}
  .nav-card.next{text-align:left}
  .foot-in{display:block}
  .foot-in p{margin:12px 0}
}
@media(prefers-reduced-motion:reduce){*,*::before,*::after{transition:none!important;scroll-behavior:auto!important}}