/* Образование LUXCODE — префикс ln- */
.ln{--gold:#fbbf24;--blue:#60a5fa;--ink:#060912;--line:rgba(255,255,255,.1);--disp:'Unbounded','Segoe UI',system-ui,sans-serif;font-family:'Manrope',-apple-system,'Segoe UI',Roboto,sans-serif;padding-bottom:100px;overflow-x:clip}
.ln>section{padding-top:150px}
.ln h1,.ln h2,.ln h3{margin:0;font-family:var(--disp);color:var(--lx-text-strong,#fff)}
.ln h1,.ln h2,.ln h3{overflow-wrap:break-word;hyphens:none;text-wrap:balance}
.ln h2{font-size:clamp(24px,3.2vw,40px);line-height:1.14;letter-spacing:-.025em;font-weight:500;max-width:18em}
.ln-lead{max-width:560px;margin:20px 0 0;opacity:.72;font-size:17.5px;line-height:1.65}
.ln-btn{display:inline-flex;align-items:center;justify-content:center;padding:17px 32px;border-radius:999px;border:1px solid transparent;font:inherit;font-weight:800;text-decoration:none;color:#0b1020;cursor:pointer;background:var(--gold);transition:transform .2s,box-shadow .25s}
.ln-btn:hover{transform:translateY(-2px);box-shadow:0 14px 40px rgba(251,191,36,.38)}
.ln-btn.ghost{background:rgba(255,255,255,.04);color:inherit;border-color:rgba(255,255,255,.25)}
.ln-btn.ghost:hover{box-shadow:none;border-color:#fff}
.ln a:focus-visible,.ln button:focus-visible,.ln summary:focus-visible{outline:2px solid var(--gold);outline-offset:3px}
.ln-cta{display:flex;gap:12px;flex-wrap:wrap;margin-top:34px}

/* ---------- hero ---------- */
.ln>.ln-hero{padding-top:70px;position:relative}
.ln-hero::before{content:"";position:absolute;left:50%;top:-40px;width:1100px;max-width:140%;height:620px;transform:translateX(-50%);background:radial-gradient(closest-side,rgba(251,191,36,.14),transparent),radial-gradient(closest-side at 70% 40%,rgba(59,130,246,.22),transparent);pointer-events:none;z-index:-1}
.ln-hero h1{font-size:clamp(30px,4.8vw,62px);line-height:1.05;letter-spacing:-.035em;font-weight:700;max-width:14em}
.ln-hero .ln-lead{font-size:19px;max-width:600px}
.ln-facts{display:flex;flex-wrap:wrap;gap:0;margin-top:56px;border-top:1px solid var(--line)}
.ln-fact{flex:1 1 180px;padding:24px 24px 0 0}
.ln-fact b{display:block;font:700 clamp(28px,3.4vw,42px)/1 var(--disp);color:var(--gold)}
.ln-fact span{display:block;margin-top:10px;font-size:14px;opacity:.65;line-height:1.45}

/* окно среды */
.ln-env{margin-top:72px;border-radius:26px;background:#0a0f1e;border:1px solid #2a3858;box-shadow:0 60px 140px rgba(0,0,0,.6),0 0 0 8px rgba(255,255,255,.03);overflow:hidden}
.ln-env-bar{display:flex;align-items:center;gap:8px;padding:14px 18px;border-bottom:1px solid var(--line);font-size:13px;font-weight:600;color:rgba(255,255,255,.55)}
.ln-env-bar i{width:11px;height:11px;border-radius:50%;background:#ef4444}.ln-env-bar i:nth-child(2){background:#fbbf24}.ln-env-bar i:nth-child(3){background:#34d399}
.ln-env-bar span{margin-left:10px}
.ln-env-bar em{margin-left:auto;font-style:normal;color:#34d399}
.ln-env-body{display:grid;grid-template-columns:230px minmax(0,1fr) 270px;min-height:380px}
.ln-env-body>div{padding:22px}
.ln-mods{border-right:1px solid var(--line);display:grid;gap:10px;align-content:start}
.ln-mods small,.ln-side small{font-size:12px;opacity:.5;font-weight:700}
.ln-mod{display:flex;justify-content:space-between;gap:8px;padding:11px 13px;border-radius:12px;font-size:14px;font-weight:600;background:rgba(255,255,255,.03)}
.ln-mod.done{opacity:.55}.ln-mod.done::after{content:"✓";color:#34d399}
.ln-mod.on{background:rgba(251,191,36,.12);border:1px solid rgba(251,191,36,.4);color:#fff}
.ln-code{display:flex;flex-direction:column}
.ln-code pre{margin:0;flex:1;font:14px/1.85 ui-monospace,SFMono-Regular,Menlo,monospace;color:#cbd5e1;overflow-x:auto}
.ln-code .k{color:#c084fc}.ln-code .f{color:#60a5fa}.ln-code .s{color:#fbbf24}.ln-code .c{color:#64748b}
.ln-ok{padding:13px 16px;border-radius:12px;font:13px ui-monospace,Menlo,monospace;color:#34d399;background:rgba(52,211,153,.08);border:1px solid rgba(52,211,153,.25)}
.ln-side{border-left:1px solid var(--line);display:grid;gap:12px;align-content:start}
.ln-tile{aspect-ratio:16/10;border-radius:14px;display:flex;align-items:flex-end;padding:10px;font-size:12.5px;font-weight:700;background:radial-gradient(90% 90% at 30% 20%,#2c4a8a,#14213d);position:relative}
.ln-tile.b{background:radial-gradient(90% 90% at 70% 20%,#5a3a8a,#1c1838)}
.ln-tile::before{content:"";position:absolute;left:50%;top:34%;width:34px;height:34px;margin-left:-17px;border-radius:50%;background:rgba(255,255,255,.22)}
.ln-msg{padding:10px 13px;border-radius:12px 12px 12px 3px;background:rgba(255,255,255,.06);font-size:13px;line-height:1.45}

/* ---------- витрина ---------- */
.ln-show{display:grid;grid-template-columns:minmax(0,.8fr) minmax(0,1.2fr);gap:56px;margin-top:64px;align-items:start}
.ln-modes{border-top:1px solid var(--line)}
.ln-mode{display:block;width:100%;text-align:left;padding:24px 4px 24px 0;border:0;border-bottom:1px solid var(--line);background:none;color:inherit;font:inherit;cursor:pointer;opacity:.5;transition:opacity .25s,padding .25s}
.ln-mode b{display:block;font:500 clamp(17px,1.8vw,22px)/1.25 var(--disp)}
.ln-mode span{display:block;max-height:0;overflow:hidden;margin-top:0;font-size:15px;line-height:1.6;opacity:.75;transition:max-height .35s,margin .35s}
.ln-mode:hover{opacity:.85}
.ln-mode[aria-selected=true]{opacity:1;padding-left:18px;box-shadow:inset 3px 0 var(--gold)}
.ln-mode[aria-selected=true] span{max-height:140px;margin-top:10px}
.ln-stage{position:sticky;top:96px;min-height:460px;padding:36px;border-radius:28px;background:linear-gradient(160deg,#17223f,#0b1122);border:1px solid #2a3858;display:flex;flex-direction:column;gap:22px;overflow:hidden}
.ln-stage::before{content:"";position:absolute;right:-90px;top:-90px;width:260px;height:260px;border-radius:50%;background:radial-gradient(closest-side,rgba(251,191,36,.25),transparent)}
.ln-stage h3{font-size:clamp(20px,2.4vw,28px);line-height:1.2;position:relative}
.ln-stage ul{margin:0;padding:0;list-style:none;display:grid;gap:12px;font-size:16px;position:relative}
.ln-stage li{display:flex;gap:12px;align-items:baseline}
.ln-stage li::before{content:"";flex:none;width:8px;height:8px;border-radius:50%;background:var(--gold)}
.ln-stage .ln-cta{margin-top:auto;position:relative}
.ln-big{font:700 clamp(54px,8vw,96px)/1 var(--disp);color:var(--gold);position:relative}
.ln-big small{font-size:.28em;color:#fff;opacity:.7;margin-left:10px}

/* ---------- видео ---------- */
.ln-revs{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;margin-top:56px}
.ln-rev{position:relative;aspect-ratio:9/16;border-radius:24px;overflow:hidden;background:#000;border:1px solid var(--line);transition:border-color .3s}
.ln-rev:hover{border-color:rgba(251,191,36,.6)}
.ln-rev-cover{position:absolute;inset:0;width:100%;height:100%;padding:0;border:0;background:none;cursor:pointer;color:#fff}
.ln-rev-cover img{width:100%;height:100%;object-fit:cover;object-position:50% 30%;display:block;transition:transform .6s}
.ln-rev:hover img{transform:scale(1.04)}
.ln-rev-cover::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(5,9,18,.4),transparent 30%,transparent 50%,rgba(5,9,18,.92));pointer-events:none}
.ln-rev-who{position:absolute;left:16px;bottom:18px;right:16px;z-index:2;text-align:left;font-size:15px;font-weight:800}
.ln-rev-who small{display:block;margin-bottom:3px;font-size:12.5px;font-weight:600;opacity:.7}
.ln-rev-play{position:absolute;right:14px;top:14px;z-index:2;width:50px;height:50px;border-radius:50%;background:var(--gold);display:grid;place-items:center;transition:transform .25s}
.ln-rev-play svg{width:18px;height:18px;margin-left:3px}
.ln-rev:hover .ln-rev-play{transform:scale(1.12)}
.ln-rev video{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;background:#000}
.ln-note{margin-top:22px;font-size:14px;opacity:.55}

/* ---------- олимпиада ---------- */
.ln-oly{padding:64px 56px;border-radius:32px;background:radial-gradient(500px 300px at 100% 0,rgba(251,191,36,.16),transparent),#0b1122;border:1px solid rgba(251,191,36,.35)}
.ln-oly-top{display:grid;grid-template-columns:minmax(0,1fr);gap:36px}.ln-oly .ln-cd{max-width:560px}
.ln-cdlabel{font-size:15px;font-weight:700;color:var(--gold);margin-bottom:16px}
.ln-cd{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:10px}
.ln-cd div{padding:20px 6px 14px;border-radius:18px;text-align:center;background:rgba(255,255,255,.04);border:1px solid var(--line)}
.ln-cd b{display:block;font:700 clamp(26px,3.4vw,44px)/1 var(--disp);font-variant-numeric:tabular-nums}
.ln-cd small{display:block;margin-top:10px;font-size:12.5px;opacity:.55}
.ln-stages{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:0;margin:48px 0 36px;border-top:1px solid var(--line)}
.ln-stages div{padding:22px 20px 0 0}
.ln-stages b{display:block;font:500 20px var(--disp);color:var(--gold)}
.ln-stages span{display:block;margin-top:8px;font-size:14.5px;opacity:.7}

/* ---------- FAQ ---------- */
.ln-faq{max-width:860px;margin-top:44px;border-top:1px solid var(--line)}
.ln-faq details{border-bottom:1px solid var(--line)}
.ln-faq summary{display:flex;justify-content:space-between;gap:16px;padding:24px 0;cursor:pointer;list-style:none;font-weight:700;font-size:18px}
.ln-faq summary::-webkit-details-marker{display:none}
.ln-faq summary::after{content:"+";font-size:26px;line-height:1;color:var(--gold);transition:transform .25s}
.ln-faq details[open] summary::after{transform:rotate(45deg)}
.ln-faq p{margin:0;padding:0 0 24px;max-width:62ch;opacity:.72;line-height:1.7}

/* ---------- финал ---------- */
.ln-final{margin-top:150px;padding:96px 48px;border-radius:36px;text-align:center;background:radial-gradient(600px 320px at 50% 0,rgba(251,191,36,.2),transparent),radial-gradient(700px 360px at 50% 100%,rgba(59,130,246,.25),transparent),#0b1122;border:1px solid #2a3858}
.ln-final h2{font-size:clamp(26px,4vw,48px);margin:0 auto;max-width:17em}
.ln-final .ln-lead{margin:20px auto 0}
.ln-final .ln-cta{justify-content:center}
.ln>section.ln-final{padding-top:96px}

@media(max-width:980px){
  .ln>section{padding-top:100px}
  .ln-env-body{grid-template-columns:minmax(0,1fr)}
  .ln-mods,.ln-side{display:none}
  .ln-show{grid-template-columns:minmax(0,1fr);gap:36px}
  .ln-stage{position:relative;top:0;min-height:0}
  .ln-revs{grid-template-columns:repeat(2,1fr);max-width:520px}
  .ln-oly{padding:40px 22px}
  .ln-stages{grid-template-columns:1fr}
  .ln-stages div{padding:18px 0;border-bottom:1px solid var(--line)}
  .ln-final{margin-top:100px;padding:64px 22px}
}
@media(max-width:640px){
  .ln-revs{display:flex;max-width:none;overflow-x:auto;scroll-snap-type:x mandatory;gap:14px;padding-bottom:16px}
  .ln-rev{flex:0 0 72%;scroll-snap-align:center}
  .ln-stage{padding:26px 20px}
  .ln-cd{gap:6px}
}
@media(prefers-reduced-motion:reduce){.ln *{transition:none!important;animation:none!important}}

/* ---------- v3: продающие блоки ---------- */
.ln-chips{display:flex;flex-wrap:wrap;gap:10px;margin-top:30px}
.ln-chips a{padding:9px 16px;border-radius:999px;font-size:14px;font-weight:700;text-decoration:none;color:inherit;border:1px solid var(--line);background:rgba(255,255,255,.04);transition:border-color .2s,background .2s}
.ln-chips a:hover{border-color:var(--gold);background:rgba(251,191,36,.08)}
.ln-micro{margin-top:16px;font-size:14px;opacity:.6}
.ln-next{padding:18px;border-radius:16px;background:linear-gradient(135deg,rgba(59,130,246,.2),rgba(251,191,36,.1));border:1px solid rgba(96,165,250,.3)}
.ln-next small{font-size:12px;opacity:.6;font-weight:700}
.ln-next b{display:block;margin:6px 0 12px;font:500 19px var(--disp)}
.ln-next span{display:inline-block;padding:10px 18px;border-radius:999px;background:var(--gold);color:#1a1200;font-size:13px;font-weight:800}
.ln-pg{display:grid;gap:8px;padding:14px 16px;border-radius:12px;background:rgba(255,255,255,.04);font-size:13.5px;font-weight:600}
.ln-pg i{display:block;height:6px;border-radius:9px;background:rgba(255,255,255,.1);overflow:hidden}
.ln-pg i::after{content:"";display:block;height:100%;width:62%;background:linear-gradient(90deg,var(--blue),var(--gold))}
.ln-cabinet{display:grid;gap:12px;align-content:start}
.ln-utp{margin-top:56px}
.ln-utp .ln-fact b{font:700 16px/1.3 var(--disp);color:#fff}
.ln-utp .ln-fact b::before{content:"";display:block;width:28px;height:3px;border-radius:3px;background:var(--gold);margin-bottom:16px}
.ln-utp .ln-fact span{font-size:15px;opacity:.7}
.ln-vs{margin-top:56px;border-top:1px solid var(--line)}
.ln-vs>div{display:grid;grid-template-columns:minmax(0,.7fr) minmax(0,1fr) minmax(0,1.2fr);gap:28px;padding:22px 0;border-bottom:1px solid var(--line);align-items:baseline}
.ln-vs .h{padding:14px 0;font-size:13px;font-weight:700;opacity:.5}
.ln-vs .h span:last-child{color:var(--gold);opacity:1}
.ln-vs b{font-size:16px}
.ln-vs span{font-size:15px;line-height:1.55;opacity:.6}
.ln-vs span:last-child{opacity:1;color:#fff;font-weight:600}
.ln-vs span:last-child::before{content:"✓";color:var(--gold);font-weight:800;margin-right:10px}
.ln-vs .h span:last-child::before{content:none}
.ln-caps{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:0 48px;margin-top:56px}
.ln-cap{padding:28px 0;border-top:1px solid var(--line)}
.ln-cap b{display:block;font:500 17px/1.3 var(--disp);color:#fff}
.ln-cap span{display:block;margin-top:12px;font-size:15px;line-height:1.6;opacity:.68}
.ln-steps{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:24px;margin-top:56px;counter-reset:s}
.ln-step{padding-top:22px;border-top:2px solid var(--line);counter-increment:s}
.ln-step:first-child{border-color:var(--gold)}
.ln-step::before{content:counter(s);display:block;font:700 34px/1 var(--disp);color:var(--gold);margin-bottom:16px}
.ln-step b{display:block;font-size:17px}
.ln-step span{display:block;margin-top:8px;font-size:14.5px;line-height:1.55;opacity:.68}
.ln-team{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:72px;align-items:center}
.ln-check{margin:32px 0 0;padding:0;list-style:none;border-top:1px solid var(--line)}
.ln-check li{padding:18px 0;border-bottom:1px solid var(--line);display:flex;gap:14px;font-size:16px;font-weight:600;line-height:1.45}
.ln-check li::before{content:"✓";color:var(--gold);font-weight:800}
.ln-trust{margin-top:34px;font-size:14px;opacity:.55;max-width:560px;line-height:1.6}
@media(max-width:980px){
  .ln-vs>div{grid-template-columns:1fr;gap:6px}.ln-vs .h{display:none}
  .ln-caps{grid-template-columns:1fr}
  .ln-steps{grid-template-columns:repeat(2,minmax(0,1fr))}
  .ln-team{grid-template-columns:1fr;gap:36px}
}
@media(max-width:560px){.ln-steps{grid-template-columns:1fr}}

/* ---------- v4: вовлечение ---------- */
.ln-try{display:grid;grid-template-columns:minmax(0,.6fr) minmax(0,1.4fr);gap:40px;margin-top:56px;align-items:start}
.ln-try-tabs{display:grid;gap:10px}
.ln-try-tabs button{text-align:left;padding:18px 20px;border-radius:16px;border:1px solid var(--line);background:rgba(255,255,255,.03);color:inherit;font:700 16px 'Manrope',sans-serif;cursor:pointer;transition:border-color .2s,background .2s}
.ln-try-tabs button[aria-selected=true]{border-color:var(--gold);background:rgba(251,191,36,.1)}
.ln-box{padding:36px;border-radius:28px;background:linear-gradient(160deg,#17223f,#0b1122);border:1px solid #2a3858;min-height:340px;display:flex;flex-direction:column;gap:18px}
.ln-box small{font-size:13px;font-weight:700;color:var(--gold)}
.ln-q{font:500 clamp(20px,2.4vw,28px)/1.3 var(--disp);color:#fff}
.ln-q code{font:15px/1.7 ui-monospace,Menlo,monospace;display:block;margin-top:14px;padding:14px 16px;border-radius:12px;background:rgba(255,255,255,.05);color:#cbd5e1;white-space:pre}
.ln-opts{display:flex;gap:10px;flex-wrap:wrap}
.ln-opts button{padding:14px 26px;border-radius:14px;border:1px solid rgba(255,255,255,.22);background:rgba(255,255,255,.04);color:#fff;font:800 17px 'Manrope',sans-serif;cursor:pointer;transition:transform .15s,border-color .2s,background .2s}
.ln-opts button:hover:not(:disabled){transform:translateY(-2px);border-color:var(--gold)}
.ln-opts button.ok{background:rgba(52,211,153,.18);border-color:#34d399}
.ln-opts button.no{background:rgba(239,68,68,.15);border-color:#ef4444}
.ln-opts button:disabled{cursor:default}
.ln-fb{font-size:15.5px;line-height:1.6}
.ln-fb b{display:block;margin-bottom:4px;font-size:17px}
.ln-aud{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:24px;margin-top:56px}
.ln-aud>div{padding:40px;border-radius:28px;border:1px solid var(--line);background:rgba(255,255,255,.025)}
.ln-aud>div:last-child{background:linear-gradient(160deg,rgba(251,191,36,.12),rgba(59,130,246,.1));border-color:rgba(251,191,36,.3)}
.ln-aud h3{font-size:clamp(20px,2.2vw,26px)}
.ln-aud ul{margin:24px 0 0;padding:0;list-style:none;display:grid;gap:16px;font-size:16px;line-height:1.5}
.ln-aud li{display:flex;gap:12px}.ln-aud li::before{content:"✓";color:var(--gold);font-weight:800}
.ln-quiz{display:grid;grid-template-columns:minmax(0,.8fr) minmax(0,1.2fr);gap:56px;align-items:center}
.ln-qopts{display:grid;gap:10px}
.ln-qopts button{text-align:left;padding:18px 22px;border-radius:16px;border:1px solid var(--line);background:rgba(255,255,255,.04);color:#fff;font:700 16px 'Manrope',sans-serif;cursor:pointer;transition:border-color .2s,padding .2s}
.ln-qopts button:hover{border-color:var(--gold);padding-left:28px}
.ln-prog{font-size:13px;font-weight:700;color:var(--gold)}
.ln-resp{display:grid;gap:12px}
.ln-resp>div{display:grid;grid-template-columns:44px minmax(0,1fr) auto;gap:14px;align-items:center;padding:16px;border-radius:16px;background:#0f172b;border:1px solid #27344d}
.ln-resp i{width:44px;height:44px;border-radius:50%;background:linear-gradient(135deg,#2c4a8a,#5a3a8a)}
.ln-resp b{display:block;font-size:15px}.ln-resp span{font-size:13px;opacity:.6}
.ln-resp em{font:800 13px 'Manrope',sans-serif;font-style:normal;padding:9px 16px;border-radius:999px;background:var(--gold);color:#1a1200}
.ln-sticky{position:fixed;left:0;right:0;bottom:0;z-index:50;display:flex;justify-content:center;padding:14px 16px calc(14px + env(safe-area-inset-bottom,0px));background:linear-gradient(0deg,rgba(6,9,18,.95),rgba(6,9,18,0));transform:translateY(120%);transition:transform .35s;pointer-events:none}
.ln-sticky.show{transform:none}.ln-sticky .ln-btn{pointer-events:auto;box-shadow:0 10px 40px rgba(0,0,0,.5)}
@media(max-width:980px){.ln-try,.ln-quiz,.ln-aud{grid-template-columns:minmax(0,1fr)}.ln-try-tabs{grid-template-columns:repeat(3,minmax(0,1fr))}.ln-aud>div{padding:28px 22px}.ln-box{padding:26px 20px}}
@media(max-width:560px){.ln-try-tabs{grid-template-columns:1fr}}