/* StatMX · раздел «Обучение» — эталонные стили макета.
   Шапка .top-nav повторяет /help (docs.py); остальное — новое для /learn. */
:root{--bg:#f8f6f3;--s1:#fff;--s2:#f2efea;--bd:#e8e4df;--tx:#0a0a0a;--mt:#8a8580;--mt2:#6b6661;--tx2:#3d3935;--ac:#ff5c35;--ac-h:#e0451f;--ac-tx:#c2401c;--ok:#10b981;--dark:#0a0a0a;--dark-mt:#b5afa8;
  --fh:Unbounded,sans-serif;--fb:Inter,-apple-system,BlinkMacSystemFont,sans-serif;--mono:ui-monospace,'SF Mono',Menlo,Consolas,monospace}
*{margin:0;padding:0;box-sizing:border-box}
body{font-family:var(--fb);background:var(--bg);color:var(--tx);-webkit-font-smoothing:antialiased}
a{color:var(--ac);text-decoration:none}a:hover{color:var(--ac-h)}
img{display:block;max-width:100%}

/* ── шапка (как /help) + пункт «Обучение» */
.top-nav{border-bottom:1px solid var(--bd);padding:16px 24px;display:flex;align-items:center;justify-content:space-between;gap:12px 24px;position:sticky;top:0;background:rgba(248,246,243,.85);backdrop-filter:blur(12px);z-index:100}
.top-nav .logo{font-size:20px;font-weight:700;letter-spacing:-.5px;color:var(--tx)}
.top-nav .logo span{display:inline-block;width:6px;height:6px;background:var(--ac);border-radius:50%;vertical-align:super;margin-left:1px}
.top-nav .nav-links{display:flex;gap:20px;font-size:14px;align-items:center}
.top-nav .nav-links a{color:var(--mt);transition:color .2s}.top-nav .nav-links a:hover{color:var(--tx)}
.top-nav .nav-links a.on{color:var(--ac)}
.nav-cta{padding:6px 16px;background:rgba(255,92,53,.08);border:1px solid rgba(255,92,53,.15);border-radius:8px;font-size:13px;font-weight:500;color:var(--ac)!important}
.nav-cta-m{display:none}

/* ── общие */
.wrap{max-width:1120px;margin:0 auto;padding:0 24px}
.label{font-family:var(--fh);font-size:11px;font-weight:700;letter-spacing:4px;color:var(--ac);text-transform:uppercase}
.label.sm{font-size:10px;letter-spacing:3px}
.h1{font-family:var(--fh);font-size:48px;font-weight:800;letter-spacing:-1.5px;line-height:1.12}
.h2{font-family:var(--fh);font-size:32px;font-weight:800;letter-spacing:-1px;line-height:1.2}
.lead{font-size:17px;line-height:1.6;color:var(--mt2)}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:10px;border-radius:10px;font-size:15px;transition:transform .2s,box-shadow .2s,border-color .2s,color .2s}
.btn-p{padding:15px 32px;background:var(--ac);color:#fff;font-weight:600}.btn-p:hover{color:#fff;transform:translateY(-2px);box-shadow:0 12px 32px rgba(255,92,53,.25)}
.btn-s{padding:15px 28px;border:1px solid var(--bd);color:var(--mt2);font-weight:500}.btn-s:hover{border-color:var(--tx);color:var(--tx)}
.chips{display:flex;flex-wrap:wrap;gap:8px}
.chip{display:inline-flex;align-items:center;gap:8px;padding:8px 14px;border:1px solid var(--bd);border-radius:100px;background:#fff;font-size:13px;font-weight:500}
.dur{position:absolute;right:10px;bottom:10px;padding:3px 8px;border-radius:6px;background:rgba(10,10,10,.78);color:#fff;font-size:12px;font-weight:600;letter-spacing:.3px}
.play{position:absolute;left:50%;top:50%;border-radius:50%;background:var(--ac);display:flex;align-items:center;justify-content:center;box-shadow:0 10px 28px rgba(255,92,53,.35);transform:translate(-50%,-50%)}
.play svg{fill:#fff}
.poster{position:relative;aspect-ratio:16/9;overflow:hidden;background:var(--s2)}
.poster img{width:100%;height:100%;object-fit:cover;transition:transform .4s}

/* ── /learn: герой */
.hero{display:flex;flex-wrap:wrap;gap:48px 56px;align-items:center;padding-top:72px;padding-bottom:32px}
.hero-text{flex:1 1 420px;min-width:0}
.hero-text .label{margin-bottom:18px}.hero-text .h1{margin-bottom:18px}.hero-text .lead{max-width:520px;margin-bottom:28px}
.hero-text .chips{margin-bottom:32px}.hero-btns{display:flex;flex-wrap:wrap;gap:12px}
.feat{flex:1 1 520px;min-width:0;display:block;background:#fff;border:1px solid var(--bd);border-radius:18px;overflow:hidden;color:var(--tx);box-shadow:0 20px 60px rgba(0,0,0,.05)}
.feat .dur{right:12px;bottom:12px}
/* кнопка «Смотреть» — таблетка внизу слева, чтобы не закрывать название на обложке */
.watch{position:absolute;left:20px;bottom:20px;display:inline-flex;align-items:center;gap:10px;height:52px;padding:0 24px 0 18px;border-radius:100px;background:var(--ac);color:#fff;font-size:15px;font-weight:600;box-shadow:0 10px 28px rgba(255,92,53,.35);transition:transform .2s,box-shadow .2s}
.watch svg{fill:#fff}
.feat:hover .watch,.player:hover .watch{transform:translateY(-2px);box-shadow:0 16px 40px rgba(255,92,53,.45)}
.feat-body{padding:20px 24px 22px;display:flex;align-items:center;justify-content:space-between;gap:16px}
.feat-title{font-size:18px;font-weight:600;margin-top:8px}.feat-note{font-size:14px;color:var(--mt2);white-space:nowrap}

/* ── /learn: секции и карточки */
.sec{padding-top:56px;padding-bottom:24px}
.sec-head{display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;gap:12px 24px;margin-bottom:28px}
.sec-head .label{margin-bottom:12px}.sec-meta{font-size:14px;color:var(--mt2)}
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:24px}
.grid.big{grid-template-columns:repeat(auto-fill,minmax(440px,1fr))}
.card{display:flex;flex-direction:column;background:#fff;border:1px solid var(--bd);border-radius:14px;overflow:hidden;color:var(--tx);transition:border-color .2s,box-shadow .2s,transform .2s}
.card:hover{color:var(--tx);border-color:rgba(255,92,53,.35);box-shadow:0 8px 28px rgba(0,0,0,.06);transform:translateY(-2px)}
.card:hover .poster img{transform:scale(1.03)}
.card .play{width:52px;height:52px;opacity:0;transform:translate(-50%,-50%) scale(.88);transition:opacity .2s,transform .2s}
.card:hover .play{opacity:1;transform:translate(-50%,-50%) scale(1)}
.card-body{padding:18px 20px 22px;display:flex;flex-direction:column;gap:8px}
.card-title{font-size:17px;font-weight:600;line-height:1.35}
.card-desc{font-size:14px;line-height:1.5;color:var(--mt2)}
.grid.big .card{border-radius:16px}.grid.big .card .play{width:64px;height:64px}
.grid.big .card-body{padding:22px 24px 24px;gap:10px}.grid.big .card-title{font-size:20px;line-height:1.3}
.tags{display:flex;flex-wrap:wrap;gap:6px;margin-top:4px}
.tag{padding:5px 10px;border-radius:6px;background:var(--s2);font-size:12px;font-weight:500;color:#57524d}

/* ── тёмный блок CTA */
.cta-sec{padding-top:72px;padding-bottom:96px}
.cta{background:var(--dark);border-radius:20px;padding:48px 56px;display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:28px 48px}
.cta-text{flex:1 1 420px;min-width:0}.cta .label{margin-bottom:14px}
.cta-title{font-family:var(--fh);font-size:30px;font-weight:800;letter-spacing:-1px;line-height:1.25;color:var(--bg);margin-bottom:12px}
.cta-sub{font-size:16px;line-height:1.6;color:var(--dark-mt)}
.cta .btn-p{padding:16px 32px;white-space:nowrap}

/* ── подвал (как на главной) */
.foot{max-width:1112px;margin:0 auto;padding:0 24px 40px}
.foot-cols{border-top:1px solid var(--bd);padding-top:44px;display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:32px}
.foot-col{display:flex;flex-direction:column;gap:9px;font-size:15px}
.foot-col a{color:var(--mt)}.foot-col a:hover{color:var(--tx)}.foot-col a.on{color:var(--tx);font-weight:500}
.foot-h{font-family:var(--fh);font-size:12px;font-weight:700;letter-spacing:3px;margin-bottom:8px}
.foot-note{font-size:13px;color:var(--mt);margin-top:4px}
.foot-bottom{border-top:1px solid var(--bd);margin-top:40px;padding-top:22px;display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:12px}
.foot-logo{font-family:var(--fh);font-size:16px;font-weight:700;letter-spacing:-.5px}
.foot-logo span{display:inline-block;width:5px;height:5px;background:var(--ac);border-radius:50%;vertical-align:super;margin-left:1px}
.foot-legal{font-size:13px;color:var(--mt)}

/* ── страница видео */
.page{max-width:1240px;margin:0 auto;padding:28px 24px 88px}
.crumbs{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--mt);margin-bottom:24px}
.crumbs a{color:var(--mt)}.crumbs a:hover{color:var(--tx)}.crumbs .cur{color:var(--tx)}
.crumbs-m{display:none}
.layout{display:flex;flex-wrap:wrap;gap:32px;align-items:flex-start}
.main-col{flex:999 1 640px;min-width:0}
.side-col{flex:1 1 320px;max-width:400px;min-width:0;display:flex;flex-direction:column;gap:16px;position:sticky;top:88px}
.player{position:relative;display:block;width:100%;aspect-ratio:16/9;padding:0;border:0;border-radius:16px;overflow:hidden;background:#0a0a0a;cursor:pointer;box-shadow:0 20px 60px rgba(0,0,0,.08)}
.player img{width:100%;height:100%;object-fit:cover}
.player video{width:100%;height:100%;display:block;background:#0a0a0a}
.player .watch{left:24px;bottom:24px;height:56px;font-size:16px}
.player .dur{right:16px;bottom:16px;padding:5px 10px;font-size:13px}
.v-head{padding:28px 4px 0}
.v-meta{display:flex;flex-wrap:wrap;align-items:center;gap:10px;margin-bottom:14px}.v-meta .muted{font-size:13px;color:var(--mt)}
.v-title{font-family:var(--fh);font-size:36px;font-weight:800;letter-spacing:-1px;line-height:1.15;margin-bottom:14px}
.v-desc{font-size:17px;line-height:1.6;color:var(--mt2);max-width:680px;margin-bottom:28px}
.pn-row{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:12px;margin-bottom:32px}
.pn{display:flex;align-items:center;gap:14px;padding:16px 18px;border:1px solid var(--bd);border-radius:14px;color:var(--tx);transition:border-color .2s,background .2s}
.pn:hover{color:var(--tx);border-color:rgba(255,92,53,.35);background:#fff}
.pn.next{justify-content:space-between;border-color:rgba(255,92,53,.25);background:rgba(255,92,53,.05)}
.pn-t{display:flex;flex-direction:column;gap:3px;min-width:0}.pn.next .pn-t{margin-left:auto;text-align:right}
.pn-k{font-size:12px;color:var(--mt)}.pn.next .pn-k{color:var(--ac-tx)}.pn-n{font-size:15px;font-weight:600}
.tr{border:1px solid var(--bd);border-radius:14px;background:#fff}
.tr summary{list-style:none;cursor:pointer;display:flex;align-items:center;justify-content:space-between;gap:12px;padding:18px 22px}
.tr summary::-webkit-details-marker{display:none}
.tr-l{display:flex;align-items:center;gap:12px}.tr-t{font-size:16px;font-weight:600}.tr-m{font-size:13px;color:var(--mt)}
.tr .chev{transition:transform .2s}.tr[open] .chev{transform:rotate(180deg)}
.tr-body{padding:4px 22px 24px;border-top:1px solid var(--s2);display:flex;flex-direction:column;gap:12px;font-size:15px;line-height:1.65;color:var(--tx2)}
.toc{background:#fff;border:1px solid var(--bd);border-radius:16px;padding:20px 12px 12px}
.toc-h{display:flex;align-items:baseline;justify-content:space-between;gap:12px;padding:0 10px 14px}
.toc-t{font-family:var(--fh);font-size:13px;font-weight:700;letter-spacing:-.2px}.toc-n{font-size:12px;color:var(--mt)}
.toc-bar{height:4px;border-radius:4px;background:var(--s2);margin:0 10px 16px;overflow:hidden}.toc-bar i{display:block;height:100%;background:var(--ac);border-radius:4px}
.toc-g{font-family:var(--fh);font-size:9px;font-weight:700;letter-spacing:3px;color:var(--mt);padding:4px 10px 8px}.toc-g.gap{padding-top:16px}
.toc-r{display:grid;grid-template-columns:34px minmax(0,1fr) auto;align-items:center;gap:10px;padding:10px;border-radius:10px;color:var(--tx);font-size:14px;transition:background .15s}
.toc-r:hover{color:var(--tx);background:var(--bg)}
.toc-r b{font-family:var(--fh);font-size:12px;font-weight:700;color:rgba(255,92,53,.45)}
.toc-r span{line-height:1.35;color:var(--tx2)}.toc-r small{font-size:12px;color:var(--mt);font-variant-numeric:tabular-nums}
.toc-r.cur{background:rgba(255,92,53,.08)}.toc-r.cur b{color:var(--ac)}.toc-r.cur span{color:var(--tx);font-weight:600}
.side-cta{background:var(--dark);border-radius:16px;padding:24px}
.side-cta-t{font-family:var(--fh);font-size:17px;font-weight:800;letter-spacing:-.4px;line-height:1.3;color:var(--bg);margin-bottom:8px}
.side-cta-s{font-size:14px;line-height:1.55;color:var(--dark-mt);margin-bottom:18px}
.side-cta .btn-p{display:flex;padding:14px 20px;font-size:14px}
.foot-mini{max-width:1192px;margin:0 auto;padding:0 24px 40px}
.foot-mini>div{border-top:1px solid var(--bd);padding-top:22px;display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:12px}
.foot-mini nav{display:flex;flex-wrap:wrap;gap:20px;font-size:14px}.foot-mini nav a{color:var(--mt)}.foot-mini nav a:hover{color:var(--tx)}

/* ── блок «Запрос для DeepSeek» (master-2) */
.prompt{background:#fff;border:1px solid var(--bd);border-radius:16px;padding:24px;margin-bottom:24px}
.prompt-h{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:12px 20px;margin-bottom:10px}
.prompt-h>div{display:flex;align-items:center;gap:12px}
.prompt-ico{width:36px;height:36px;border-radius:10px;background:rgba(255,92,53,.1);display:flex;align-items:center;justify-content:center}
.prompt-t{font-size:18px;font-weight:600}
.prompt-note{font-size:14px;line-height:1.6;color:var(--mt2);margin-bottom:16px}
.copy{display:inline-flex;align-items:center;gap:8px;min-height:44px;padding:0 18px;border:0;border-radius:10px;background:var(--ac);color:#fff;font-family:inherit;font-size:14px;font-weight:600;cursor:pointer;transition:background .2s,transform .1s}
.copy:hover{background:var(--ac-h)}.copy:active{transform:scale(.97)}
.copy .ok{display:none}.copy.done{background:var(--ok)}.copy.done .ok{display:inline}.copy.done .def{display:none}
.prompt pre{padding:18px 20px;background:var(--bg);border:1px solid var(--s2);border-radius:12px;font-family:var(--mono);font-size:13px;line-height:1.7;color:#2b2825;white-space:pre-wrap;word-break:break-word;overflow-x:auto}
.prompt mark{background:rgba(255,92,53,.16);box-shadow:0 0 0 3px rgba(255,92,53,.16);border-radius:4px;color:var(--tx)}
.prompt-legend{display:flex;align-items:center;gap:8px;margin-top:14px;font-size:13px;color:var(--mt)}
.prompt-legend i{display:inline-block;width:12px;height:12px;border-radius:3px;background:rgba(255,92,53,.18)}

/* ── карточка курса над списком /help */
.help-promo{display:flex;align-items:center;gap:20px;padding:16px;background:#fff;border:1px solid rgba(255,92,53,.25);border-radius:14px;color:var(--tx);margin-bottom:24px}
.help-promo:hover{color:var(--tx);border-color:rgba(255,92,53,.45)}
.help-promo .poster{flex:0 0 176px;height:99px;aspect-ratio:auto;border-radius:10px}
.help-promo .play{width:40px;height:40px}

/* ── телефон */
@media (max-width:640px){
  .top-nav{flex-wrap:wrap;padding:14px 16px 0}
  .top-nav .nav-links{order:3;width:100%;gap:22px;overflow-x:auto;white-space:nowrap;scrollbar-width:none}
  .top-nav .nav-links a{padding:10px 0 12px}
  .top-nav .nav-links a.on{border-bottom:2px solid var(--ac);padding-bottom:10px;font-weight:500}
  .top-nav .nav-links .nav-cta{display:none}
  .nav-cta-m{display:inline-flex;align-items:center;min-height:36px;padding:0 14px}
  .wrap{padding:0 16px}
  .h1{font-size:32px;letter-spacing:-1px;line-height:1.15}
  .h2{font-size:22px;letter-spacing:-.6px;line-height:1.25}
  .label{font-size:10px}
  .hero{padding-top:36px;gap:20px}
  .hero-text .lead{font-size:16px;margin-bottom:20px}.hero-text .chips{margin-bottom:22px}
  .hero-btns .btn-p{width:100%;min-height:52px}.hero-btns .btn-s{display:none}
  .feat{flex-basis:100%}.watch{left:12px;bottom:12px;height:44px;padding:0 18px 0 14px;font-size:14px}.feat-body{padding:14px 16px 16px}.feat-note{display:none}
  .sec{padding-top:40px}.sec-head{margin-bottom:18px}
  .grid{grid-template-columns:1fr;gap:10px}
  .grid:not(.big) .card{flex-direction:row;gap:12px;padding:10px;border-radius:14px}
  .grid:not(.big) .card .poster{flex:0 0 128px;height:72px;aspect-ratio:auto;border-radius:9px}
  .grid:not(.big) .card .play{display:none}
  .grid:not(.big) .card .dur{right:5px;bottom:5px;padding:1px 6px;font-size:11px}
  .grid:not(.big) .card-body{padding:2px 0 0;gap:4px}
  .grid:not(.big) .card-title{font-size:15px}
  .grid:not(.big) .card-desc{font-size:12.5px;line-height:1.4;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
  .grid.big{grid-template-columns:1fr;gap:16px}.grid.big .card-title{font-size:18px}.grid.big .card .play{display:none}
  .cta-sec{padding-top:40px;padding-bottom:48px}.cta{padding:28px 22px;border-radius:18px}.cta-title{font-size:22px}.cta .btn-p{width:100%;min-height:52px;white-space:normal}
  .foot{padding:0 16px 32px}.foot-cols{grid-template-columns:repeat(2,minmax(0,1fr));gap:28px 16px;padding-top:28px}.foot-col{font-size:14px}
  .foot-bottom .foot-logo{display:none}.foot-legal{font-size:12px;line-height:1.6}
  .page{padding:16px 16px 40px}
  .crumbs{display:none}.crumbs-m{display:inline-flex;align-items:center;gap:6px;min-height:32px;font-size:13px;color:var(--mt);margin-bottom:14px}
  .side-col{position:static;max-width:none;flex-basis:100%}
  .player{border-radius:12px}.player .watch{left:12px;bottom:12px;height:44px;font-size:14px}.player .dur{right:10px;bottom:10px;padding:3px 8px;font-size:12px}
  .v-head{padding:20px 2px 0}.v-meta .muted{display:none}.v-title{font-size:26px;letter-spacing:-.8px;line-height:1.2;margin-bottom:10px}.v-desc{font-size:15px;margin-bottom:20px}
  .pn-row{grid-template-columns:1fr;gap:10px;margin-bottom:16px}.pn.next{order:-1}
  .tr summary{padding:16px}.tr-m{display:none}.tr-body{padding:4px 16px 18px}
  .toc-r{min-height:44px;padding:0 8px}
  .prompt{padding:18px}.prompt .copy{width:100%;justify-content:center}
  .help-promo .poster{flex-basis:112px;height:63px}
}