/* Nuvexi — стилистика как imggen.org/old-filter: dark slate + magenta + yellow CTA */
:root{
  --bg:#0f172a;
  --bg-2:#111827;
  --card:#1e293b;
  --line:rgba(148,163,184,.22);
  --text:#f0f5f9;
  --mute:#94a3b8;
  --magenta:#e879f9;
  --magenta-2:#d946ef;
  --yellow:#ffe14d;
  --yellow-2:#f5c800;
  --ok:#34d399;
  --font:'Poppins',system-ui,sans-serif;
  --r:16px;
  --r-pill:999px;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:var(--font);
  background:radial-gradient(900px 500px at 80% -10%,rgba(232,121,249,.18),transparent 55%),
              radial-gradient(700px 400px at -10% 30%,rgba(99,102,241,.12),transparent 50%),
              var(--bg);
  color:var(--text);
  line-height:1.6;
  font-size:16px;
  min-height:100vh;
}
img,canvas{max-width:100%;display:block}
a{color:var(--magenta);text-decoration:none}
a:hover{color:#f0abfc}
.wrap{width:min(1120px,92%);margin:0 auto}

.topbar{
  position:sticky;top:0;z-index:50;
  background:rgba(15,23,42,.86);
  backdrop-filter:blur(12px);
  border-bottom:1px solid var(--line);
}
.nav{display:flex;align-items:center;justify-content:space-between;gap:12px;min-height:68px}
.logo{
  display:flex;align-items:center;gap:8px;color:#fff!important;font-weight:700;font-size:20px;
}
.logo i{
  width:28px;height:28px;border-radius:8px;
  background:conic-gradient(from 210deg,#34d399,#38bdf8,#e879f9,#34d399);
  display:block;
}
.nav-links{display:none;gap:18px;font-size:14px;font-weight:500}
.nav-links a{color:var(--mute)}
.nav-links a:hover{color:#fff}
.btn-yellow{
  display:inline-flex;align-items:center;justify-content:center;
  background:linear-gradient(180deg,#ffe14d 0%,#f5c800 50%,#e6b800 100%);
  color:#111!important;font-weight:700;font-size:13px;
  padding:10px 16px;border-radius:var(--r-pill);border:0;cursor:pointer;
  text-decoration:none;white-space:nowrap;
}
.btn-yellow:hover{filter:brightness(1.05)}
.btn-mag{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  background:transparent;color:#fff!important;font-weight:600;font-size:15px;
  padding:12px 20px;border-radius:12px;border:1.5px solid var(--magenta);
  cursor:pointer;text-decoration:none;
}
.btn-mag:hover{background:rgba(232,121,249,.12)}
.btn-mag:disabled{opacity:.45;cursor:not-allowed}
.btn-ghost{
  display:inline-flex;align-items:center;justify-content:center;
  background:transparent;color:var(--mute)!important;border:1px solid var(--line);
  padding:11px 16px;border-radius:12px;cursor:pointer;font-weight:500;font-size:14px;
}
.nav-toggle{
  width:42px;height:42px;border-radius:10px;border:1px solid var(--line);
  background:transparent;display:inline-flex;align-items:center;justify-content:center;cursor:pointer;
}
.nav-toggle span{display:block;width:16px;height:2px;background:#fff;position:relative}
.nav-toggle span::before,.nav-toggle span::after{content:"";position:absolute;left:0;width:16px;height:2px;background:#fff}
.nav-toggle span::before{top:-5px}.nav-toggle span::after{top:5px}
.mobile-nav{display:none;border-top:1px solid var(--line);padding:10px 0 14px}
.mobile-nav.open{display:block}
.mobile-nav a{display:block;padding:10px 0;color:#fff;border-bottom:1px solid var(--line);font-size:14px}

.hero{padding:40px 0 28px}
.hero-grid{display:grid;gap:28px;align-items:center}
.hero h1{
  font-size:clamp(28px,5.2vw,48px);font-weight:700;line-height:1.15;
  color:var(--magenta);margin-bottom:14px;
}
.hero .lead{color:var(--mute);font-size:17px;max-width:36em;margin-bottom:20px}
.ba{
  display:grid;grid-template-columns:1fr 1fr;gap:12px;position:relative;
}
.ba-card{
  border-radius:18px;overflow:hidden;border:1px solid var(--line);
  background:var(--card);min-height:220px;position:relative;
  box-shadow:0 0 40px rgba(232,121,249,.12);
}
.ba-card .badge{
  position:absolute;top:10px;left:10px;z-index:2;
  background:rgba(15,23,42,.85);color:#fff;font-size:12px;font-weight:600;
  padding:5px 10px;border-radius:999px;
}
.ba-ph{
  height:100%;min-height:220px;padding:0;overflow:hidden;
  background:#1e293b;
}
.ba-ph img{
  display:block;width:100%;height:100%;min-height:220px;object-fit:cover;object-position:center top;
}
.ba-ph.old{background:linear-gradient(160deg,#1e1b4b,#312e81 40%,#4c1d95)}
.ba-arrow{
  display:none;position:absolute;left:50%;top:50%;transform:translate(-50%,-50%);
  width:36px;height:36px;border-radius:50%;background:#fff;color:#0f172a;
  font-weight:700;place-items:center;z-index:3;box-shadow:0 8px 20px rgba(0,0,0,.35);
}

.section{padding:36px 0}
.sec-h{text-align:center;margin-bottom:22px}
.sec-h h2{font-size:clamp(22px,3.5vw,32px);font-weight:700;margin-bottom:8px}
.sec-h p{color:var(--mute);max-width:40em;margin:0 auto}

.tool{
  background:rgba(30,41,59,.72);border:1px solid var(--line);border-radius:20px;padding:18px;
}
.warn{
  background:rgba(232,121,249,.08);border:1px solid rgba(232,121,249,.28);
  color:#f5d0fe;border-radius:12px;padding:12px 14px;font-size:13px;margin-bottom:14px;
}
.warn a{color:#f0abfc;text-decoration:underline}
.upload{
  border:1.5px dashed rgba(232,121,249,.45);border-radius:16px;padding:28px 16px;
  text-align:center;cursor:pointer;background:rgba(15,23,42,.35);transition:.2s;
}
.upload:hover,.upload.is-drag{border-color:var(--magenta);background:rgba(232,121,249,.08)}
.upload .preview{
  width:120px;height:120px;border-radius:16px;object-fit:cover;margin:0 auto 12px;
  display:none;border:2px solid rgba(255,255,255,.2);
}
.upload.has-img .preview{display:block}
.upload.has-img .ico{display:none}
.upload .ico{font-size:28px;margin-bottom:8px}
.upload h3{font-size:18px;margin-bottom:4px}
.upload p{color:var(--mute);font-size:14px}
.row{display:flex;flex-wrap:wrap;gap:10px;margin-top:14px}
.err{
  display:none;margin-top:10px;padding:10px 12px;border-radius:10px;
  background:rgba(239,68,68,.15);color:#fecaca;font-size:13px;
}
.err.show{display:block}

.process{display:none;margin-top:16px}
.process.on{display:block}
.proc-top{display:flex;align-items:center;gap:14px;margin-bottom:10px}
.pct{font-size:28px;font-weight:700;color:var(--magenta);min-width:4.2ch}
.bar{flex:1;height:10px;border-radius:99px;background:rgba(148,163,184,.2);overflow:hidden}
.bar>i{display:block;height:100%;width:0;background:linear-gradient(90deg,var(--magenta),#c084fc);transition:width .12s linear}
.steps{
  list-style:none;max-height:210px;overflow:auto;
  background:rgba(15,23,42,.45);border:1px solid var(--line);border-radius:12px;padding:8px 12px;
}
.steps li{padding:7px 0;font-size:13px;color:var(--mute);border-bottom:1px solid rgba(148,163,184,.12);display:flex;gap:8px}
.steps li:last-child{border:0}
.steps li.is-on{color:#fff;font-weight:600}
.steps li.is-done{color:var(--ok)}
.steps li::before{content:"○"}
.steps li.is-on::before{content:"●";color:var(--magenta)}
.steps li.is-done::before{content:"✓"}

.result{display:none;margin-top:16px}
.result.on{display:block}
.result h3{font-size:20px;margin-bottom:6px}
.hint{color:var(--mute);font-size:14px;margin-bottom:10px}
.ctrl label{display:grid;gap:6px;color:var(--mute);font-size:13px;margin-bottom:12px}
.ctrl input[type=range]{width:100%;accent-color:var(--magenta)}
.strip{display:grid;grid-template-columns:repeat(2,1fr);gap:10px}
.neg{
  background:#0b1220;border:1px solid var(--line);border-radius:14px;overflow:hidden;
}
.neg figcaption{
  font-size:12px;font-weight:600;padding:8px 10px;color:var(--magenta);
  background:rgba(232,121,249,.08);
}
.neg canvas{width:100%;aspect-ratio:1;background:#020617}

.steps3{display:grid;gap:12px}
.step-card{
  background:rgba(30,41,59,.65);border:1px solid var(--line);border-radius:16px;padding:16px;
}
.step-card .n{
  width:32px;height:32px;border-radius:10px;background:rgba(232,121,249,.15);color:var(--magenta);
  display:grid;place-items:center;font-weight:700;margin-bottom:10px;
}
.step-card h3{font-size:17px;margin-bottom:6px}
.step-card p{color:var(--mute);font-size:14px}

.feat{display:grid;gap:12px}
.feat article{
  background:rgba(30,41,59,.55);border:1px solid var(--line);border-radius:16px;padding:16px;
}
.feat h3{font-size:17px;margin-bottom:6px}
.feat p{color:var(--mute);font-size:14px}

.faq details{
  background:rgba(30,41,59,.55);border:1px solid var(--line);border-radius:12px;
  padding:12px 14px;margin-bottom:8px;
}
.faq summary{cursor:pointer;font-weight:600;list-style:none}
.faq summary::-webkit-details-marker{display:none}
.faq details p{margin-top:8px;color:var(--mute);font-size:14px}

.footer{border-top:1px solid var(--line);padding:28px 0 110px;font-size:13px;color:var(--mute)}
.footer-grid{display:grid;gap:16px}
.footer a{color:var(--mute)}
.footer a:hover{color:var(--magenta)}
.req{
  margin-top:14px;padding:12px;border:1px solid rgba(128,128,128,.4);
  border-radius:10px;background:rgba(128,128,128,.1);color:inherit;font-size:13px;line-height:1.5;
}
.disc{margin-top:12px;font-size:12px;line-height:1.5;max-width:62em}

.sticky-cta{
  position:fixed;left:0;right:0;bottom:0;z-index:60;
  padding:10px 14px calc(10px + env(safe-area-inset-bottom));
  background:rgba(15,23,42,.94);border-top:1px solid var(--line);
  transform:translateY(110%);transition:transform .3s ease;
}
.sticky-cta.show{transform:none}
.sticky-cta .btn-yellow{width:100%;max-width:420px;margin:0 auto;display:flex;padding:13px 18px;font-size:15px}

.page{padding:28px 0 50px}
.page h1{font-size:28px;color:var(--magenta);margin-bottom:8px}
.prose{max-width:720px}
.prose h2{font-size:18px;margin:22px 0 8px;color:#fff}
.prose p,.prose li{color:var(--mute);margin-bottom:12px;font-size:15px}
.prose ul{padding-left:18px}

@media (min-width:800px){
  .nav-links{display:flex}
  .nav-toggle{display:none}
  .hero{padding:52px 0 36px}
  .hero-grid{grid-template-columns:1.05fr .95fr;gap:40px}
  .ba-arrow{display:grid}
  .ba-card,.ba-ph{min-height:320px}
  .steps3{grid-template-columns:repeat(3,1fr)}
  .feat{grid-template-columns:repeat(2,1fr)}
  .strip{grid-template-columns:repeat(3,1fr)}
  .footer-grid{grid-template-columns:1.4fr 1fr 1fr}
}
@media (max-width:799px){
  .nav .btn-yellow{display:none}
}