/* AI Content Box — лендинг. Дизайн-система ui-ux-pro-max (AI-Native, тёплый минимал) */
:root{
  --bg:#FFFBEB; --surface:#FFFFFF; --ink:#0F172A; --muted:#78716C;
  --line:#EEEDED; --soft:#F6F6F6; --accent:#D97706; --accent-hover:#B45309;
  --accent-soft:#FEF3C7; --radius:16px;
  --shadow:0 1px 2px rgba(15,23,42,.04), 0 14px 40px rgba(180,83,9,.08);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--ink);
  font:16px/1.6 'Plus Jakarta Sans',-apple-system,Segoe UI,Roboto,Arial,sans-serif;-webkit-font-smoothing:antialiased}
a{text-decoration:none;color:inherit}
h2{font-size:clamp(24px,3vw,34px);text-align:center;margin:0 0 10px;letter-spacing:-.02em}
.sub{text-align:center;color:var(--muted);max-width:620px;margin:0 auto 32px}
h3{margin:.2em 0;letter-spacing:-.01em}
svg{display:block}

/* nav */
.nav{position:sticky;top:0;z-index:20;display:flex;align-items:center;justify-content:space-between;
  padding:14px 28px;background:rgba(255,251,235,.85);backdrop-filter:blur(8px);border-bottom:1px solid var(--line)}
.brand{display:inline-flex;align-items:center;gap:9px;font-weight:800;letter-spacing:-.01em}
.brand i{width:20px;height:20px;border-radius:7px;background:linear-gradient(135deg,var(--accent),#F59E0B);display:block}
.nav nav{display:flex;align-items:center;gap:22px}
.nav nav a{color:var(--muted);font-size:15px;font-weight:500}
.nav nav a:hover{color:var(--ink)}

/* buttons */
.btn{display:inline-block;border-radius:11px;padding:12px 22px;font-weight:700;transition:.15s;cursor:pointer;font-size:15px}
.btn--primary{background:var(--accent);color:#fff;box-shadow:0 8px 22px rgba(217,119,6,.28)}
.btn--primary:hover{background:var(--accent-hover);transform:translateY(-2px)}
.btn--ghost{border:1px solid var(--line);color:var(--ink);background:#fff}
.btn--ghost:hover{border-color:var(--accent)}

/* hero */
.hero{text-align:center;padding:84px 24px 60px;
  background:radial-gradient(900px 380px at 50% -8%,#FEF3C7 0%,var(--bg) 60%)}
.kicker{display:inline-block;font-size:12px;letter-spacing:.16em;text-transform:uppercase;font-weight:700;
  color:var(--accent-hover);background:var(--accent-soft);border-radius:99px;padding:5px 13px;margin-bottom:18px}
.hero h1{font-size:clamp(30px,5vw,52px);line-height:1.08;letter-spacing:-.03em;margin:0 auto .25em;max-width:15ch}
.lead{color:var(--muted);max-width:600px;margin:0 auto 28px;font-size:clamp(16px,2vw,19px)}
.cta-row{display:flex;gap:14px;justify-content:center;flex-wrap:wrap}
.badges{list-style:none;display:flex;gap:10px;justify-content:center;flex-wrap:wrap;padding:0;margin:32px 0 14px}
.badges li{font-size:13px;color:var(--ink);background:#fff;border:1px solid var(--line);border-radius:99px;padding:7px 15px}
.models{color:var(--muted);font-size:13px;letter-spacing:.06em;font-weight:600}

/* sections */
.section{padding:64px 24px;max-width:1080px;margin:0 auto}
.section--alt{background:#fff;max-width:none;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.section--alt > *{max-width:1080px;margin-left:auto;margin-right:auto}

.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:16px}
.card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:22px;transition:.15s}
.card:hover{border-color:#E7D8B8;box-shadow:var(--shadow);transform:translateY(-3px)}
.card .ic{display:inline-flex;align-items:center;justify-content:center;width:42px;height:42px;border-radius:11px;
  background:var(--accent-soft);color:var(--accent-hover);margin-bottom:8px}
.card .ic svg{width:23px;height:23px}
.card h3{font-size:17px}
.card p{color:var(--muted);font-size:14px;margin:.3em 0 0}

.steps{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.step{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:24px}
.step .num{display:inline-grid;place-items:center;width:38px;height:38px;border-radius:50%;
  background:var(--accent);color:#fff;font-weight:800;margin-bottom:10px}
.step p{color:var(--muted);margin:.3em 0 0}

.roles{display:flex;gap:12px;justify-content:center;flex-wrap:wrap;margin-top:22px}
.roles span{background:#fff;border:1px solid var(--line);border-radius:99px;padding:9px 18px;font-weight:600}

.pricing .plan{text-align:center}
.plan .price{font-size:30px;font-weight:800;margin:8px 0;letter-spacing:-.02em}
.plan .price small{font-size:14px;font-weight:500;color:var(--muted)}
.plan p{color:var(--muted);font-size:14px}
.plan--hot{border-color:var(--accent);box-shadow:var(--shadow);position:relative}
.plan--hot::after{content:"популярный";position:absolute;top:-11px;left:50%;transform:translateX(-50%);
  background:var(--accent);color:#fff;font-size:11px;font-weight:700;border-radius:99px;padding:3px 11px}

.foot{background:#fff;color:var(--muted);text-align:center;padding:42px 24px;border-top:1px solid var(--line)}
.foot .brand{color:var(--ink);justify-content:center;margin-bottom:6px}

@media(max-width:760px){
  .nav nav a:not(.btn){display:none}
  .steps{grid-template-columns:1fr}
}
@media(prefers-reduced-motion:reduce){*{transition:none!important}}