/* exxam.ru — лендинг (страничный слой поверх base.css).
   Все правила ограничены body.landing, чтобы НЕ протекать на внутренние страницы
   (несбкопленные .card/.chip/.btn/footer раньше ломали тренажёр).
   Общие токены и примитивы берутся из base.css; здесь — только лендинг и его варианты. */

/* ---------- токены лендинга ---------- */
body.landing{
  --maxw:1120px;
  --stat-size:clamp(30px,3.6vw,42px);
  --calc-a:#2a2049; --calc-b:#171126;
  --header-bg:rgba(23,19,38,.76);
  line-height:1.65;
}
[data-theme="light"] body.landing{--calc-a:#f4f3fc;--calc-b:#ffffff;--header-bg:rgba(245,246,252,.85)}
@media (prefers-color-scheme: light){
  :root:not([data-theme]) body.landing{--calc-a:#f4f3fc;--calc-b:#ffffff;--header-bg:rgba(245,246,252,.85)}
}
body.landing h1,body.landing h2,body.landing h3,body.landing h4{line-height:1.14}

body.landing .wrap{max-width:var(--maxw);margin:0 auto;padding:0 26px;position:relative;z-index:2}

/* фон-схема: у лендинга чуть заметнее */
body.landing .circuit{opacity:.25}
[data-theme="light"] body.landing .circuit{opacity:.35}

body.landing .mono{font-family:var(--mono)}
body.landing .eyebrow{font-family:var(--mono);font-size:14px;color:var(--mint);letter-spacing:.04em}
body.landing .eyebrow::before{content:"// ";color:var(--dim)}

/* ---------- шапка ---------- */
body.landing header.top{position:sticky;top:0;z-index:50;background:var(--header-bg);backdrop-filter:saturate(160%) blur(12px);
  border-bottom:1px solid var(--line);transition:background-color .25s ease,border-color .25s ease}
body.landing .top-inner{display:flex;align-items:center;gap:20px;height:68px}
body.landing .brand{display:flex;align-items:center;gap:11px;font-weight:700;font-size:18px}
body.landing .brand .mark{width:36px;height:36px;border-radius:10px;display:grid;place-items:center;font-family:var(--mono);font-size:15px;
  color:#fff;background:linear-gradient(135deg,var(--accent-1),var(--accent-2));box-shadow:0 0 22px -4px var(--violet-glow)}
body.landing nav.main{display:flex;gap:2px;margin-left:14px}
body.landing nav.main a{padding:9px 13px;border-radius:9px;font-size:14.5px;color:var(--muted);font-weight:500;white-space:nowrap}
body.landing nav.main a:hover{color:var(--ink);background:var(--panel)}
body.landing .top-actions{margin-left:auto;display:flex;align-items:center;gap:10px}
body.landing .theme-toggle{width:42px;height:42px;flex:none;border:1px solid var(--line);background:var(--panel);color:var(--ink);
  border-radius:11px;display:grid;place-items:center;cursor:pointer;padding:0;
  transition:border-color .15s,color .15s,background-color .25s}
body.landing .theme-toggle:hover{border-color:var(--violet);color:var(--violet)}
body.landing .theme-toggle svg{width:20px;height:20px}
body.landing .theme-toggle:focus-visible{outline:2px solid var(--mint);outline-offset:3px}
body.landing .burger{display:none;width:42px;height:42px;border:1px solid var(--line);background:var(--panel);border-radius:10px;cursor:pointer;padding:0}
body.landing .burger span{display:block;width:18px;height:2px;background:var(--ink);margin:3px auto;border-radius:2px}
body.landing .mobile-menu{display:none;border-top:1px solid var(--line);background:var(--panel)}
body.landing .mobile-menu a{display:block;padding:14px 26px;border-bottom:1px solid var(--line);color:var(--muted);font-weight:500}

/* ---------- кнопки (лендинг-вариант) ---------- */
body.landing .btn{display:inline-flex;align-items:center;gap:9px;border:1px solid var(--line);background:var(--panel);color:var(--ink);
  border-radius:11px;padding:11px 18px;font-family:var(--sans);font-size:14.5px;font-weight:600;cursor:pointer;
  transition:transform .12s,border-color .15s,box-shadow .15s,background .15s,color .15s;white-space:nowrap}
body.landing .btn:hover{border-color:var(--violet);transform:translateY(-1px)}
body.landing .btn.primary{background:linear-gradient(135deg,var(--accent-1),var(--accent-2));border-color:transparent;color:#fff;
  box-shadow:0 10px 30px -12px var(--violet-glow)}
body.landing .btn.primary:hover{box-shadow:0 14px 34px -12px var(--violet-glow)}
body.landing .btn.ghost{background:transparent;border-color:transparent;color:var(--mint);padding-left:6px;padding-right:6px}
body.landing .btn.ghost:hover{background:transparent;text-decoration:underline}
body.landing .btn.lg{padding:14px 24px;font-size:16px}
body.landing .btn.sm{padding:8px 13px;font-size:13.5px}
body.landing .btn:focus-visible,body.landing a:focus-visible{outline:2px solid var(--mint);outline-offset:3px}

/* ---------- секции ---------- */
body.landing .band{padding:78px 0;position:relative}
body.landing .band-head{max-width:660px;margin:0 auto 46px;text-align:center}
body.landing .band-head h2{font-size:clamp(26px,3.4vw,38px);margin:12px 0 12px;font-weight:600}
body.landing .band-head p{color:var(--muted);font-size:16px}
body.landing .panel{background:linear-gradient(180deg,var(--panel),var(--panel-2));border:1px solid var(--line);border-radius:18px}
body.landing .node-dot{width:9px;height:9px;border-radius:50%;background:var(--violet);box-shadow:0 0 12px var(--violet);display:inline-block}

/* ---------- герой ---------- */
body.landing .hero{padding:60px 0 70px}
body.landing .hero-grid{display:grid;grid-template-columns:1.02fr .98fr;gap:50px;align-items:center}
body.landing .hero h1{font-size:clamp(32px,4.8vw,56px);font-weight:700;margin:18px 0 18px;letter-spacing:-.03em}
body.landing .hero h1 .g{background:linear-gradient(100deg,var(--accent-1),var(--mint));-webkit-background-clip:text;background-clip:text;color:transparent}
body.landing .hero .lead{font-size:clamp(16px,1.5vw,19px);color:var(--lead-ink);max-width:580px;margin:0 0 28px}
body.landing .cta-row{display:flex;gap:12px;flex-wrap:wrap;align-items:center}
body.landing .chips{display:flex;gap:9px;flex-wrap:wrap;margin:26px 0 0}
body.landing .chip{display:inline-flex;align-items:center;gap:8px;font-family:var(--mono);font-size:13.5px;color:var(--lead-ink);
  border:1px solid var(--line);border-radius:999px;padding:7px 13px;background:var(--chip-bg);
  transition:background-color .25s ease,border-color .25s ease,color .25s ease}
body.landing .chip i{width:6px;height:6px;border-radius:50%;background:var(--mint);box-shadow:0 0 8px var(--mint)}

/* ---------- панель с графом ---------- */
body.landing .board{padding:22px;position:relative}
body.landing .board .blabel{display:flex;justify-content:space-between;font-family:var(--mono);font-size:13px;color:var(--muted);margin-bottom:12px}
body.landing .board svg{width:100%;height:auto;display:block;border-radius:12px;
  background:radial-gradient(circle at 50% 45%,var(--board-a),var(--board-b));border:1px solid var(--line);
  transition:background-color .25s ease,border-color .25s ease}
body.landing .nedge{stroke:var(--violet);stroke-width:2.2;fill:none;opacity:.55}
body.landing .nedge.flow{stroke-dasharray:7 6;animation:flow 4s linear infinite}
body.landing .nvert{fill:var(--node-fill);stroke:var(--mint);stroke-width:2.4}
body.landing .nvert-core{fill:var(--mint)}
body.landing .nwt{font-family:var(--mono);font-size:23px;font-weight:700;fill:var(--edge-num);text-anchor:middle;dominant-baseline:middle;paint-order:stroke;stroke:var(--node-halo);stroke-width:6px}
body.landing .nlab{font-family:var(--sans);font-size:31px;font-weight:600;fill:var(--ink);text-anchor:middle;dominant-baseline:middle}
@keyframes flow{to{stroke-dashoffset:-26}}
body.landing .answer-row{display:flex;align-items:center;gap:12px;margin-top:16px;font-family:var(--mono);font-size:14.5px}
body.landing .answer-row .ibox{border:1px solid var(--line);border-radius:9px;padding:9px 14px;color:var(--mint);background:var(--ibox-bg)}
body.landing .answer-row .ok{color:var(--mint)}

/* ---------- статистика ---------- */
body.landing .stats .stats-grid{display:grid;grid-template-columns:repeat(4,1fr);border:1px solid var(--line);border-radius:18px;overflow:hidden}
body.landing .stat{padding:28px 22px;text-align:center;border-left:1px solid var(--line);background:linear-gradient(180deg,var(--panel),var(--panel-2));
  transition:background-color .25s ease,border-color .25s ease}
body.landing .stat:first-child{border-left:none}
body.landing .stat b{display:block;font-size:var(--stat-size);font-weight:700;letter-spacing:-.02em;
  height:calc(var(--stat-size) * 1.5);line-height:calc(var(--stat-size) * 1.5);
  background:linear-gradient(120deg,var(--accent-1),var(--mint));-webkit-background-clip:text;background-clip:text;color:transparent}
body.landing .stat b.inf{font-size:calc(var(--stat-size) * 1.4);transform:translateY(-3px)}
body.landing .stat span{font-size:15px;color:var(--muted)}

/* ---------- предметы ---------- */
body.landing .subjects-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
body.landing .subj{display:flex;flex-direction:column;gap:12px;border:1px solid var(--line);border-radius:16px;padding:22px;
  background:var(--panel-2);transition:transform .15s,border-color .15s,box-shadow .15s,background-color .25s}
body.landing .subj.ready{border-color:var(--violet-line-strong);background:linear-gradient(135deg,var(--panel),var(--panel-2));
  box-shadow:0 0 40px -20px var(--violet-glow)}
body.landing .subj.ready:hover{transform:translateY(-3px);border-color:var(--violet)}
body.landing .subj.soon{opacity:.42}
body.landing .subj .ic{width:46px;height:46px;border-radius:13px;display:grid;place-items:center;
  background:var(--violet-soft);color:var(--violet);border:1px solid var(--violet-border)}
body.landing .subj .ic svg{width:24px;height:24px}
body.landing .subj.soon .ic{background:var(--input-bg);color:var(--muted);border-color:var(--line)}
body.landing .subj h3{font-size:17px;font-weight:600}
body.landing .subj .meta{font-size:13.5px;color:var(--muted);margin-top:-6px}
body.landing .subj .foot{margin-top:auto;display:flex;align-items:center;justify-content:space-between;gap:10px;padding-top:6px}
body.landing .badge{font-family:var(--mono);font-size:11.5px;font-weight:700;border-radius:999px;padding:4px 11px}
body.landing .badge.ok{background:var(--cell-on-bg);color:var(--mint);border:1px solid var(--violet-border)}
body.landing .badge.soon{background:var(--input-bg);color:var(--muted);border:1px solid var(--line)}
body.landing .subj .go{font-family:var(--mono);font-size:13px;color:var(--mint)}
body.landing .subj .go:hover{text-decoration:underline}

/* ---------- позиционирование ---------- */
body.landing .pos{display:grid;grid-template-columns:1fr 1fr;gap:22px;max-width:940px;margin:0 auto}
body.landing .pos .col{border-radius:16px;padding:28px;border:1px solid var(--line);background:var(--panel-2);
  transition:background-color .25s ease,border-color .25s ease}
body.landing .pos .col.main{border-color:var(--violet-line-strong);box-shadow:0 0 40px -18px var(--violet-glow)}
body.landing .pos .col .lab{font-family:var(--mono);font-size:13px;color:var(--muted)}
body.landing .pos .col.main .lab{color:var(--violet)}
body.landing .pos .col h3{font-size:22px;margin:8px 0 10px;font-weight:600}
body.landing .pos .col p{margin:0;color:var(--muted);font-size:16px;line-height:1.7}

/* ---------- фишки ---------- */
body.landing .grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
body.landing .card{border-radius:18px;border:1px solid var(--line);background:linear-gradient(180deg,var(--panel),var(--panel-2));
  padding:26px;position:relative;overflow:hidden;transition:transform .15s,border-color .15s,box-shadow .15s,background-color .25s,color .25s}
body.landing .card::before{content:"";position:absolute;top:0;left:22px;right:22px;height:2px;
  background:linear-gradient(90deg,transparent,var(--violet),transparent);opacity:.6}
body.landing .card:hover{transform:translateY(-3px);border-color:var(--violet-line);box-shadow:0 24px 50px -30px var(--violet-glow)}
body.landing .card .cnode{position:absolute;top:-5px;left:50%;transform:translateX(-50%);width:10px;height:10px;border-radius:50%;
  background:var(--bg);border:2px solid var(--violet);box-shadow:0 0 10px var(--violet-glow-soft)}
body.landing .card .ic{width:44px;height:44px;border-radius:12px;display:grid;place-items:center;margin-bottom:16px;
  background:var(--violet-soft);color:var(--violet);border:1px solid var(--violet-border)}
body.landing .card .ic svg{width:23px;height:23px}
body.landing .card h3{font-size:19px;margin-bottom:10px}
body.landing .card p{margin:0 0 16px;color:var(--muted);font-size:16px;line-height:1.7}
body.landing .card .go{font-family:var(--mono);font-size:14px;color:var(--mint)}
body.landing .card .go:hover{text-decoration:underline}
body.landing .cfig{margin:0 0 16px;border:1px solid var(--line);border-radius:12px;
  background:radial-gradient(circle at 50% 40%,var(--board-a),var(--board-b));padding:8px;
  transition:background-color .25s ease,border-color .25s ease}
body.landing .cfig svg{width:100%;max-width:none;height:auto;display:block;background:none;border-radius:0}
body.landing .cfig .nedge{stroke:var(--violet)}
body.landing .cfig .nvert{fill:var(--node-fill);stroke:var(--mint)}
body.landing .cfig .nwt{font-size:26px}
body.landing .cfig .nlab{font-size:32px;fill:var(--ink)}
body.landing .cap{font-family:var(--mono);font-size:12.5px;color:var(--dim);text-align:center;margin-top:8px}
body.landing .ntt{width:100%;border-collapse:collapse;font-family:var(--mono);font-size:15px;background:var(--input-bg);border-radius:8px;overflow:hidden}
body.landing .ntt th,body.landing .ntt td{padding:7px 8px;text-align:center;border-bottom:1px solid var(--line)}
body.landing .ntt th{color:var(--muted);font-weight:500;background:var(--violet-soft)}
body.landing .ntt td.one{color:var(--mint);font-weight:700}
body.landing .ntt td.zero{color:var(--coral);font-weight:700}
body.landing .formula{font-family:var(--mono);font-size:16.5px;text-align:center;color:var(--amber);padding:18px;border:1px dashed var(--line);border-radius:10px;background:var(--formula-bg)}
body.landing .steps-mini{list-style:none;margin:0;padding:0;font-family:var(--mono);font-size:15px;color:var(--muted)}
body.landing .steps-mini li{display:flex;gap:10px;padding:5px 0}
body.landing .steps-mini b{color:var(--violet)}
body.landing .check-demo{display:flex;gap:8px;align-items:center}
body.landing .check-demo .fi{flex:1;border:1px solid var(--line);border-radius:9px;padding:9px 12px;font-family:var(--mono);color:var(--mint);background:var(--input-bg)}
body.landing .ok-demo{margin-top:10px;font-family:var(--mono);font-size:12.5px;color:var(--mint)}

/* ---------- живой калькулятор ---------- */
body.landing .card.live{grid-column:1/-1;display:grid;grid-template-columns:1fr 1.05fr;gap:32px;align-items:center;
  background:linear-gradient(135deg,var(--panel),var(--panel-2));border-color:var(--violet-line)}
body.landing .calc{border:1px solid var(--violet-border);border-radius:16px;
  background:radial-gradient(circle at 50% 30%,var(--calc-a),var(--calc-b));
  padding:22px;text-align:center;box-shadow:inset 0 0 50px -20px var(--violet-glow-soft);
  transition:background-color .25s ease,border-color .25s ease}
body.landing .calc-dec{font-family:var(--mono);font-size:44px;font-weight:700;line-height:1;color:var(--mint);text-shadow:0 0 22px var(--violet-glow-soft)}
body.landing .calc-dec small{font-size:16px;color:var(--dim);font-weight:400}
body.landing .calc-bin{font-family:var(--mono);font-size:15px;letter-spacing:4px;color:var(--lead-ink);margin-top:4px}
body.landing .calc-bits{display:flex;gap:5px;justify-content:center;margin:16px 0 4px;flex-wrap:wrap}
body.landing .cbw{display:flex;flex-direction:column;align-items:center;gap:4px}
body.landing .cbit{width:46px;height:46px;border:1px solid var(--line);border-radius:9px;display:grid;place-items:center;
  font-family:var(--mono);font-size:19px;font-weight:700;color:var(--dim);background:var(--cell-bg);cursor:pointer;user-select:none;
  transition:border-color .12s,color .12s,background-color .25s,box-shadow .12s,transform .12s}
body.landing .cbit.on{border-color:var(--mint);color:var(--mint);background:var(--cell-on-bg);box-shadow:0 0 16px -2px var(--mint)}
body.landing .cbit:hover{transform:translateY(-1px)}
body.landing .cbl{font-family:var(--mono);font-size:10px;color:var(--dim)}
body.landing .calc-ctrl{display:flex;gap:8px;justify-content:center;flex-wrap:wrap;margin-top:14px}
body.landing .calc-ctrl button{cursor:pointer;font-family:var(--mono);font-size:14px;font-weight:700;border:1px solid var(--line);
  background:var(--cell-bg);color:var(--ink);border-radius:9px;padding:9px 15px;
  transition:border-color .12s,color .12s,background-color .25s}
body.landing .calc-ctrl button:hover{border-color:var(--violet);color:var(--violet)}
body.landing .calc-ctrl button.minus,body.landing .calc-ctrl button.plus{background:linear-gradient(135deg,var(--accent-1),var(--accent-2));border-color:transparent;color:#fff;min-width:62px;font-size:17px}
body.landing .calc-ctrl button:disabled{opacity:.3;cursor:not-allowed}

/* ---------- шаги ---------- */
body.landing .how-steps{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
body.landing .how-step{border:1px solid var(--line);border-radius:16px;padding:26px;background:var(--panel-2);position:relative;
  transition:background-color .25s ease,border-color .25s ease}
body.landing .how-step .n{font-family:var(--mono);font-size:15px;color:var(--violet)}
body.landing .how-step h3{margin:12px 0 10px;font-size:19px}
body.landing .how-step p{margin:0;color:var(--muted);font-size:16px;line-height:1.7}
body.landing .how-step::after{content:"";position:absolute;top:26px;right:-18px;width:18px;height:1px;background:var(--trace)}
body.landing .how-step:last-child::after{display:none}

/* ---------- демо ---------- */
body.landing .demo{display:grid;grid-template-columns:1.05fr .95fr;gap:44px;align-items:center}
body.landing .demo-shot{border:1px solid var(--line);border-radius:18px;padding:18px;background:linear-gradient(180deg,var(--panel),var(--panel-2));
  transition:background-color .25s ease,border-color .25s ease}
body.landing .demo-shot .blabel{display:flex;justify-content:space-between;font-family:var(--mono);font-size:12.5px;color:var(--muted);margin-bottom:12px}
body.landing .dpair{display:grid;grid-template-columns:1fr;gap:20px;align-items:center}
body.landing .dpair svg{width:100%;height:auto;display:block;border-radius:10px;background:radial-gradient(circle at 50% 45%,var(--board-a),var(--board-b))}
body.landing .nmx{border-collapse:collapse;width:100%;font-family:var(--mono);font-size:15px}
body.landing .nmx th,body.landing .nmx td{border:1px solid var(--line);text-align:center;padding:5px 6px}
body.landing .nmx th{background:var(--violet-soft);color:var(--muted);font-weight:500}
body.landing .nmx .rn{background:var(--violet-soft);color:var(--ink)}
body.landing .nmx .diag{color:var(--muted);background:color-mix(in srgb,var(--violet) 8%,transparent)}
body.landing .nmx .v{color:var(--amber)}
body.landing .demo-list{list-style:none;margin:20px 0 0;padding:0;display:grid;gap:12px}
body.landing .demo-list li{display:flex;gap:12px;align-items:flex-start;font-size:16px;line-height:1.7;color:var(--lead-ink)}
body.landing .demo-list .chk{width:24px;height:24px;flex:none;border-radius:8px;display:grid;place-items:center;
  color:var(--mint);background:var(--cell-on-bg);border:1px solid var(--violet-border)}
body.landing .demo-list .chk svg{width:14px;height:14px}

/* ---------- задания ---------- */
body.landing .tasks{margin-top:44px}
body.landing .tasks h3{font-family:var(--mono);font-size:15px;color:var(--muted);font-weight:500;text-align:center;margin-bottom:14px}
body.landing .task-grid{display:grid;grid-template-columns:repeat(9,1fr);gap:8px;max-width:720px;margin:0 auto}
body.landing .task{aspect-ratio:1/1;display:grid;place-items:center;font-family:var(--mono);font-size:14px;font-weight:700;
  border:1px solid var(--line);border-radius:10px;color:var(--dim);background:var(--panel);
  transition:background-color .12s,border-color .12s,color .12s,transform .12s}
[data-theme="light"] body.landing .task{background:var(--panel-2)}
body.landing .task.ready{color:var(--ink);border-color:var(--violet-line);background:var(--panel)}
body.landing .task.ready:hover{background:var(--violet);border-color:var(--violet);color:#fff;transform:translateY(-2px);box-shadow:0 0 18px -4px var(--violet-glow)}

/* ---------- FAQ ---------- */
body.landing .faq{max-width:840px;margin:0 auto;display:grid;gap:12px}
body.landing .faq details{border:1px solid var(--line);border-radius:14px;background:var(--panel-2);overflow:hidden;
  transition:background-color .25s ease,border-color .25s ease}
body.landing .faq summary{cursor:pointer;list-style:none;padding:19px 22px;font-weight:600;font-size:18px;display:flex;gap:14px;align-items:center}
body.landing .faq summary::-webkit-details-marker{display:none}
body.landing .faq summary::before{content:"";width:8px;height:8px;border-radius:50%;background:var(--violet);box-shadow:0 0 10px var(--violet);flex:none}
body.landing .faq details[open]{border-color:var(--violet-line-strong)}
body.landing .faq .body{padding:0 22px 20px 44px;color:var(--muted);font-size:16px;line-height:1.7}

/* ---------- CTA ---------- */
body.landing .cta{position:relative;border:1px solid var(--violet-line);border-radius:22px;padding:54px 40px;text-align:center;overflow:hidden;
  background:radial-gradient(circle at 50% 0%,var(--glow-v),transparent 60%),linear-gradient(180deg,var(--panel),var(--panel-2));
  transition:background-color .25s ease,border-color .25s ease}
body.landing .cta h2{font-size:clamp(26px,3.4vw,40px);margin-bottom:12px}
body.landing .cta p{margin:0 0 26px;color:var(--muted)}
body.landing .cta .cta-nodes{position:absolute;inset:0;z-index:0;opacity:.5;pointer-events:none}

/* ---------- футер (лендинг, отдельное имя .foot) ---------- */
body.landing footer.foot{position:relative;z-index:2;border-top:1px solid var(--line);padding:48px 0 28px;margin-top:20px}
body.landing .foot-grid{display:grid;grid-template-columns:1.8fr 1fr 1fr;gap:30px}
body.landing .foot-grid p{color:var(--muted);font-size:13.5px;max-width:400px}
body.landing .foot-grid h4{font-family:var(--mono);font-size:13px;font-weight:700;margin:0 0 12px;color:var(--ink)}
body.landing .foot-grid ul{list-style:none;margin:0;padding:0}
body.landing .foot-grid li{margin:8px 0}
body.landing .foot-grid a{color:var(--muted);font-size:14px}
body.landing .foot-grid a:hover{color:var(--mint)}
body.landing .foot-bottom{display:flex;justify-content:space-between;gap:10px;flex-wrap:wrap;border-top:1px solid var(--line);
  margin-top:32px;padding-top:18px;color:var(--dim);font-size:13px;font-family:var(--mono)}

/* ---------- утилиты (вместо инлайн-стилей) ---------- */
body.landing .band.tight{padding-top:0}
body.landing .band.bordered{border-top:1px solid var(--line)}
body.landing .cfig.plain{padding:0;background:none;border:none}
body.landing .cfig.box{padding:16px}
body.landing .cfig.box-note{padding:16px;font-size:15px;color:var(--lead-ink)}
body.landing .mobile-cta{margin:16px 26px 20px}
body.landing .band-head.left{text-align:left;margin:0 0 6px}
body.landing .h2-sm{font-size:clamp(22px,2.4vw,28px)}
body.landing .mt-22{margin-top:22px}
body.landing .mb-12{margin-bottom:12px}
body.landing .cbit{padding:0}

/* ---------- появление секций ---------- */
@media (prefers-reduced-motion: no-preference){
  body.landing .reveal{opacity:0;transform:translateY(22px);transition:opacity .6s ease,transform .6s cubic-bezier(.2,.7,.2,1)}
  body.landing .reveal.in{opacity:1;transform:none}
  body.landing .card:hover .cnode{box-shadow:0 0 16px var(--violet)}
}
@media (prefers-reduced-motion: reduce){
  body.landing .nedge.flow{animation:none}
  body.landing *{transition-duration:.001s!important}
}

/* ---------- адаптив ---------- */
@media (max-width:1000px){
  body.landing .hero-grid{grid-template-columns:1fr;gap:40px}
  body.landing .grid{grid-template-columns:repeat(2,1fr)}
  body.landing .subjects-grid{grid-template-columns:repeat(2,1fr)}
  body.landing .card.live{grid-template-columns:1fr;gap:22px}
  body.landing .demo{grid-template-columns:1fr;gap:32px}
  body.landing .how-steps{grid-template-columns:1fr}
  body.landing .how-step::after{display:none}
  body.landing .task-grid{grid-template-columns:repeat(7,1fr)}
  body.landing .pos{grid-template-columns:1fr}
}
@media (max-width:1180px){
  body.landing nav.main{display:none}
  body.landing .burger{display:block}
}
@media (max-width:520px){
  body.landing .top-actions .btn{display:none}
}
@media (max-width:660px){
  body.landing .wrap{padding:0 18px}
  body.landing .burger{display:block}
  body.landing .grid{grid-template-columns:1fr}
  body.landing .subjects-grid{grid-template-columns:1fr}
  body.landing .stats .stats-grid{grid-template-columns:repeat(2,1fr)}
  body.landing .stat:nth-child(3){border-left:none}
  body.landing .stat:nth-child(-n+2){border-bottom:1px solid var(--line)}
  body.landing .task-grid{grid-template-columns:repeat(5,1fr)}
  body.landing .foot-grid{grid-template-columns:1fr}
  body.landing .dpair{grid-template-columns:1fr}
  body.landing .band{padding:56px 0}
  body.landing .circuit{opacity:.3}
}
@media (max-width:400px){
  body.landing .cbit{width:36px;height:40px;font-size:16px}
  body.landing .cbl{font-size:9px}
  body.landing .calc-dec{font-size:34px}
}