/* AI-ERIKA — компоненты лендингов (главная, обучение). skill erika-dark-design */
:root{--bg:#0E0F11;--bg2:#141519;--card:#1A1C21;--line:#2A2D34;--text:#F2F4F5;--muted:#9AA3AD;--dim:#6B737D;--acc:#39DCE1;--acc2:#1FB5BA;--good:#2BD67B;--bad:#FF5C5C;--warn:#FFC24B;--r:20px}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;scroll-padding-top:72px}
body{background:var(--bg);color:var(--text);font:16px/1.6 Manrope,system-ui,-apple-system,Segoe UI,Roboto,sans-serif;-webkit-font-smoothing:antialiased;overflow-x:hidden}
img{max-width:100%;display:block}
a{color:inherit}
h1,h2,h3{font-family:Unbounded,Manrope,sans-serif;font-weight:700;letter-spacing:-.01em;line-height:1.14}
h1{font-size:clamp(34px,5.4vw,72px)}
h2{font-size:clamp(27px,3.4vw,46px);margin-bottom:16px}
h3{font-size:clamp(17px,1.4vw,20px);margin-bottom:8px}
.acc{color:var(--acc)}.good{color:var(--good)}.muted{color:var(--muted)}.hidden{display:none!important}
.sec{padding:110px 6vw;position:relative}
.sec.alt{background:var(--bg2)}
.wrap{max-width:1240px;margin:0 auto}
.kicker{display:inline-flex;align-items:center;gap:10px;font-size:13px;font-weight:700;letter-spacing:.14em;text-transform:uppercase;color:var(--acc);margin-bottom:18px}
.kicker b{display:inline-grid;place-items:center;width:30px;height:30px;border-radius:50%;border:1px solid var(--acc);font-size:12px;letter-spacing:0}
.lead{font-size:clamp(17px,1.4vw,20px);color:var(--muted);max-width:820px}
.grid{display:grid;gap:18px}.g2{grid-template-columns:repeat(2,minmax(0,1fr))}.g3{grid-template-columns:repeat(3,minmax(0,1fr))}.g4{grid-template-columns:repeat(4,minmax(0,1fr))}
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--r);padding:26px}
.card p{color:var(--muted)}
.num{font-family:Unbounded,sans-serif;font-weight:700;font-size:clamp(28px,3vw,44px);line-height:1;color:var(--acc);white-space:nowrap}
.tag{display:inline-block;font-size:12px;font-weight:700;padding:5px 10px;border-radius:99px;background:rgba(57,220,225,.12);color:var(--acc);letter-spacing:.04em}
.mt8{margin-top:8px}.mt16{margin-top:16px}.mt24{margin-top:24px}.mt32{margin-top:32px}.mt48{margin-top:48px}
.note{font-size:13px;color:var(--dim);margin-top:14px}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:10px;background:var(--acc);color:#04282a;font-weight:800;font-size:17px;padding:17px 28px;border-radius:14px;text-decoration:none;transition:.15s;border:0;cursor:pointer;font-family:inherit}
.btn:hover{background:#5ae6ea;transform:translateY(-1px)}
.btn.ghost{background:transparent;color:var(--text);border:1px solid var(--line)}
.btn.ghost:hover{border-color:var(--acc)}
.btn.sm{font-size:14px;padding:11px 18px;border-radius:12px}

/* header */
.top{position:fixed;inset:0 0 auto 0;height:64px;z-index:90;display:flex;align-items:center;gap:24px;padding:0 24px;background:rgba(14,15,17,.82);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);border-bottom:1px solid rgba(255,255,255,.05)}
.logo{font-family:Unbounded,sans-serif;font-weight:800;font-size:15px;letter-spacing:.08em;text-decoration:none;white-space:nowrap}
.logo i{font-style:normal;color:var(--acc)}
.top nav{display:flex;gap:20px;margin:0 auto;font-size:14px;font-weight:600;color:var(--muted)}
.top nav a{text-decoration:none;white-space:nowrap;transition:color .15s}
.top nav a:hover{color:var(--acc)}
.burger{display:none;background:none;border:1px solid var(--line);color:var(--text);width:42px;height:42px;border-radius:12px;font-size:20px;cursor:pointer;margin-left:auto}
.mmenu{position:fixed;top:64px;left:0;right:0;z-index:89;background:var(--bg);border-bottom:1px solid var(--line);padding:12px 16px 20px;flex-direction:column;gap:4px}
.mmenu a{padding:12px 4px;text-decoration:none;font-weight:600;border-bottom:1px solid #1c1e23}

/* hero */
.hero{min-height:100vh;display:flex;align-items:center;padding-top:120px;background:radial-gradient(1100px 600px at 85% 15%,rgba(57,220,225,.16),transparent 60%),radial-gradient(800px 500px at 0% 100%,rgba(57,220,225,.07),transparent 60%),var(--bg)}
.hero h1 span{color:var(--acc)}
.hero .wrap{min-width:0;width:100%}
.stats{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));margin-top:56px;border-top:1px solid var(--line)}
.stats div{padding:22px 18px 0 0}
.stats p{color:var(--muted);font-size:14px;margin-top:8px}
.hero .cta{display:flex;gap:14px;flex-wrap:wrap;margin-top:36px}

/* lists */
.ticks{list-style:none;display:grid;gap:10px}
.ticks li{padding-left:30px;position:relative;color:#d5dade}
.ticks li:before{content:"";position:absolute;left:0;top:4px;width:18px;height:18px;border-radius:50%;background:rgba(57,220,225,.15) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%2339DCE1' stroke-width='3'%3E%3Cpath d='M5 12l5 5 9-10'/%3E%3C/svg%3E") center/12px no-repeat}
.crosses li:before{background:rgba(255,92,92,.14) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23FF5C5C' stroke-width='3'%3E%3Cpath d='M6 6l12 12M18 6L6 18'/%3E%3C/svg%3E") center/11px no-repeat}

/* accordion (niches, faq) */
details.acc-i{background:var(--card);border:1px solid var(--line);border-radius:16px;margin-bottom:12px;overflow:hidden}
details.acc-i summary{list-style:none;cursor:pointer;padding:20px 24px;display:flex;justify-content:space-between;align-items:center;gap:16px;font-weight:700;font-size:17px}
details.acc-i summary::-webkit-details-marker{display:none}
details.acc-i summary:after{content:"+";font-size:26px;color:var(--acc);line-height:1;transition:transform .2s;flex:none}
details.acc-i[open] summary:after{transform:rotate(45deg)}
details.acc-i .in{padding:0 24px 22px;color:var(--muted)}
.niche-row{display:flex;justify-content:space-between;gap:16px;padding:12px 0;border-top:1px solid var(--line);color:#d5dade}
.niche-row b{font-family:Unbounded,sans-serif;font-size:14px;font-weight:700;color:var(--acc);white-space:nowrap}
.niche-row small{color:var(--muted);font-size:14px;font-weight:600}

/* calc */
.field{display:flex;flex-direction:column;gap:6px;margin-bottom:14px}
.field label{font-size:13px;color:var(--muted);font-weight:600}
.field input,.field select{background:#101114;border:1px solid var(--line);border-radius:12px;color:var(--text);font:inherit;font-weight:700;padding:12px 14px;outline:none;transition:border .15s;width:100%}
.field input:focus,.field select:focus{border-color:var(--acc)}
.field input[readonly]{color:var(--dim)}
.tabs{display:flex;gap:6px;background:#101114;border:1px solid var(--line);border-radius:14px;padding:5px;margin-bottom:16px}
.tabs button{flex:1;background:none;border:0;color:var(--muted);font:inherit;font-weight:700;padding:10px;border-radius:10px;cursor:pointer}
.tabs button.on{background:var(--acc);color:#04282a}
.calc{display:grid;grid-template-columns:1fr 1fr;gap:18px}
.res{display:grid;grid-template-columns:1fr 1fr;gap:12px;align-content:start}
.res .card{padding:18px}
.res .v{font-family:Unbounded,sans-serif;font-weight:700;font-size:clamp(19px,1.8vw,26px);margin-top:6px;word-break:break-word}
.res .big{grid-column:1/-1;background:linear-gradient(135deg,rgba(57,220,225,.18),rgba(57,220,225,.04));border-color:rgba(57,220,225,.4)}
.res .big .v{font-size:clamp(28px,3vw,42px);color:var(--acc)}
.sub{font-family:Unbounded,sans-serif;font-size:13px;color:var(--acc);margin:6px 0 14px}

/* system, ab */
.step .n{font-family:Unbounded,sans-serif;color:var(--acc);font-size:14px;margin-bottom:14px}
.ba{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.ba figure{background:#fff;border-radius:14px;overflow:hidden;cursor:zoom-in;position:relative}
.ba figcaption{position:absolute;left:10px;top:10px;font-size:12px;font-weight:800;padding:5px 10px;border-radius:8px;background:#111;color:#fff}
.ba figure:last-child figcaption{background:var(--acc);color:#062b2c}
.metric{display:grid;grid-template-columns:1fr auto;gap:6px 16px;padding:16px 0;border-top:1px solid var(--line);align-items:baseline}
.metric>span{color:var(--muted)}
.metric b{font-family:Unbounded,sans-serif;font-size:20px;white-space:nowrap}
.metric small{grid-column:1/-1;color:var(--dim);font-size:13px}
.flow{display:grid;grid-template-columns:repeat(5,1fr);gap:10px}
.flow div{background:var(--card);border:1px solid var(--line);border-radius:16px;padding:18px;position:relative}
.flow div b{display:block;font-family:Unbounded,sans-serif;font-size:13px;color:var(--acc);margin-bottom:8px}
.flow div p{font-size:14px;color:var(--muted)}
.flow div:not(:last-child):after{content:"→";position:absolute;right:-12px;top:50%;transform:translateY(-50%);color:var(--acc);font-weight:800;z-index:2}

/* cases */
.case{background:var(--card);border:1px solid var(--line);border-radius:var(--r);overflow:hidden;cursor:zoom-in;transition:transform .2s,border-color .2s;display:flex;flex-direction:column}
.case:hover{transform:translateY(-3px);border-color:rgba(57,220,225,.5)}
.case .shot{height:170px;background:#fff center top/cover no-repeat;border-bottom:1px solid var(--line)}
.case .body{padding:20px}
.case .row{display:grid;grid-template-columns:1fr 1fr;gap:10px 14px;margin-top:14px}
.case .row div{font-size:13px;color:var(--muted)}
.case .row b{display:block;font-family:Unbounded,sans-serif;font-size:19px;color:var(--text);font-weight:700}
.case .row .hl b{color:var(--acc)}
.video{border-radius:var(--r);overflow:hidden;border:1px solid var(--line);background:#000}
.video video{width:100%;display:block}
.vcase{grid-template-columns:1.5fr 1fr;align-items:center}
.strip{display:flex;gap:14px;overflow-x:auto;padding-bottom:12px;scroll-snap-type:x mandatory}
.strip::-webkit-scrollbar{height:6px}.strip::-webkit-scrollbar-thumb{background:#333;border-radius:3px}
.strip img{height:340px;width:auto;border-radius:14px;border:1px solid var(--line);scroll-snap-align:start;cursor:zoom-in;background:#fff}
.wall{columns:4;column-gap:12px}
.wall img{border-radius:14px;width:100%;height:auto;margin-bottom:12px;break-inside:avoid;cursor:zoom-in;background:#1A1C21}
.wall:not(.all) img.x{display:none}

/* included */
.inc h3{display:block;font-size:clamp(15px,1.2vw,18px)}
.inc h3 em{display:block;margin-bottom:10px;font-style:normal;font-family:Unbounded,sans-serif;font-size:12px;color:var(--acc)}
.card h3,.case h3{overflow-wrap:break-word;hyphens:auto}
.inc .ticks{margin-top:14px;font-size:15px}
.addon{display:grid;grid-template-columns:1fr auto;gap:8px 18px}
.addon .ok{font-size:13px;font-weight:800;color:var(--good);white-space:nowrap}
.addon .eff{grid-column:1/-1;font-size:14px;color:var(--muted);border-top:1px dashed var(--line);padding-top:10px;margin-top:6px}
.addon .eff b{color:var(--acc)}

/* compare */
.tbl{overflow-x:auto}
.swipe{display:none}
.compare{width:100%;border-collapse:collapse;font-size:15px;min-width:720px}
.compare th,.compare td{padding:15px 14px;border-bottom:1px solid var(--line);text-align:left;vertical-align:top}
.compare th{color:var(--muted);font-weight:600;font-size:13px}
.compare th:last-child{color:var(--acc)}
.compare td:first-child{color:var(--muted);font-weight:600}
.compare td:last-child{color:var(--text);background:rgba(57,220,225,.06);font-weight:700}

/* pricing */
.price{display:grid;grid-template-columns:1.05fr 1fr;gap:18px;align-items:stretch}
.tariff{background:linear-gradient(160deg,#173436,#16181c 60%);border:1px solid rgba(57,220,225,.45);border-radius:24px;padding:34px}
.tariff .sum{white-space:nowrap;font-family:Unbounded,sans-serif;font-weight:800;font-size:clamp(34px,3.8vw,56px);line-height:1;margin:14px 0 6px}
.tariff .sum small{font-size:.38em;color:var(--muted);font-weight:500}
.rule{display:flex;gap:14px;padding:14px 0;border-bottom:1px solid var(--line)}
.rule:last-child{border:0}
.rule b{display:block}
.rule p{font-size:14px;color:var(--muted)}
.rule .ic{flex:none;width:36px;height:36px;border-radius:10px;display:grid;place-items:center;background:rgba(57,220,225,.12);color:var(--acc);font-weight:800}
.seats{display:inline-flex;align-items:center;gap:8px;font-size:13px;font-weight:700;color:var(--warn);background:rgba(255,194,75,.1);padding:6px 12px;border-radius:99px}
.seats:before{content:"";width:8px;height:8px;border-radius:50%;background:var(--warn)}

/* contact & footer */
.final{background:radial-gradient(900px 500px at 50% 0%,rgba(57,220,225,.14),transparent 65%),var(--bg);text-align:center}
.final .lead{margin:0 auto}
.socials{display:flex;gap:10px;justify-content:center;flex-wrap:wrap;margin-top:22px}
.socials a{font-size:14px;font-weight:700;padding:9px 16px;border:1px solid var(--line);border-radius:99px;text-decoration:none;color:var(--muted)}
.socials a:hover{color:var(--acc);border-color:var(--acc)}
footer{padding:48px 6vw;border-top:1px solid var(--line);font-size:13px;color:var(--dim)}
footer .wrap{display:grid;grid-template-columns:1fr 1.4fr;gap:32px}
footer b{color:var(--muted)}
footer a{color:var(--muted)}

/* lightbox */
.lb{position:fixed;inset:0;background:rgba(5,6,8,.94);z-index:200;display:none;align-items:center;justify-content:center;padding:30px}
.lb.on{display:flex}
.lb img{max-height:88vh;max-width:94vw;border-radius:10px;background:#fff}
.lb button{position:absolute;background:#1d2026;border:1px solid #333;color:#fff;width:48px;height:48px;border-radius:50%;font-size:22px;cursor:pointer}
.lb .x{top:20px;right:20px}.lb .pv{left:20px;top:50%}.lb .nx{right:20px;top:50%}
.lb .cap{position:absolute;bottom:18px;left:0;right:0;text-align:center;color:var(--muted);font-size:14px}

/* pay modal */
.pm{position:fixed;inset:0;background:rgba(5,6,8,.8);z-index:210;display:none;align-items:center;justify-content:center;padding:16px}
.pm.open{display:flex}
.pm .box{background:var(--card);border:1px solid var(--line);border-radius:22px;padding:30px;width:100%;max-width:420px;position:relative}
.pm .close{position:absolute;top:14px;right:14px;background:none;border:0;color:var(--muted);font-size:26px;cursor:pointer}
.pm .sum{font-family:Unbounded,sans-serif;font-size:30px;color:var(--acc);margin:6px 0 18px}
.pm label.chk{display:flex;gap:10px;align-items:flex-start;font-size:13px;color:var(--muted);margin:6px 0 14px}
.pm label.chk input{margin-top:3px;accent-color:var(--acc)}
.pm .err{color:var(--bad);font-size:13px;min-height:18px;margin-bottom:8px}
.pm .btn{width:100%}
.pm .btn:disabled{opacity:.6;cursor:wait}

/* cookie */
.cookie{position:fixed;left:16px;right:16px;bottom:16px;z-index:150;max-width:720px;margin:0 auto;background:var(--card);border:1px solid var(--line);border-radius:16px;padding:16px 18px;display:flex;gap:16px;align-items:center;font-size:13px;color:var(--muted);box-shadow:0 20px 50px rgba(0,0,0,.5)}
.cookie a{color:var(--acc)}

@media (max-width:1100px){.top nav{display:none}.burger{display:block}.top .btn{display:none}}
@media (max-width:1200px){
  .g4{grid-template-columns:repeat(2,minmax(0,1fr))}
  .vcase{grid-template-columns:1fr}.vcase .video{order:2}
}
@media (max-width:1000px){
  .g3,.g4{grid-template-columns:repeat(2,1fr)}.wall{columns:2}
  .calc,.price,.g2{grid-template-columns:1fr}
  .vcase{grid-template-columns:1fr}.vcase .video{order:2}
  .vcase .g2{grid-template-columns:repeat(2,minmax(0,1fr))}
  .flow{grid-template-columns:1fr 1fr}.flow div:after{display:none}
  .stats{grid-template-columns:repeat(2,minmax(0,1fr))}
  footer .wrap{grid-template-columns:1fr}
}
@media (max-width:620px){
  .sec{padding:72px 16px}
  .hero{padding-top:100px;min-height:auto;padding-bottom:64px}
  .g3,.g4,.res,.flow,.ba{grid-template-columns:1fr}
  .strip img{height:260px}
  .top{padding:0 16px}
  .cookie{flex-direction:column;align-items:stretch}
  .card{padding:22px}
  .stats .num,.num{font-size:24px}
  .stats div{padding-right:10px}
  h1{font-size:32px}
  h2{font-size:25px}
  .metric{grid-template-columns:1fr;gap:4px}
  .metric b{font-size:19px}
  .tariff{padding:24px 20px}
  .tariff .sum{font-size:34px;white-space:normal}
  .niche-row{flex-direction:column;gap:2px}
  .case .row b{font-size:17px}
  .vcase .card .num{font-size:20px!important}
  .rule .ic{width:32px;height:32px}
  details.acc-i summary{padding:16px 18px;font-size:16px}
  details.acc-i .in{padding:0 18px 18px}
  .compare{font-size:14px}
  .swipe{display:block}
  .btn{font-size:16px;padding:16px 22px}
  .hero .cta .btn,.final .btn{width:100%}
  footer{padding:36px 16px}
  .addon{grid-template-columns:1fr}
  .addon .ok{order:-1}
  h1,h2,h3{overflow-wrap:break-word}
  .vcase .card{padding:14px!important}
  .vcase .card .num{font-size:18px!important}
  .vcase .card p{font-size:13px}
}
@media (max-width:360px){
  .stats .num,.num{font-size:17px}
  .stats div{padding-right:6px}
  .vcase .card .num{font-size:16px!important}
  h1{font-size:28px}
  .sec{padding:64px 14px}
}