/* GERTS AI — маркетинг-сайт. Дизайн-система (общая для главной и посадочных). */
:root{
  /* Светлая нейтральная тема (белый фон) */
  --bg:#ffffff; --bg-soft:#f6f7f9; --card:#ffffff; --card-2:#f2f3f7;
  --bg-primary:#ffffff; --bg-secondary:#f6f7f9; --bg-card:#ffffff;
  --border:#e7e9ef; --text:#14161d; --muted:#5a6072; --muted-2:#9298a8;
  --text-primary:#14161d; --text-secondary:#5a6072; --text-muted:#9298a8;
  --accent:#7c6af7; --accent-2:#06b6d4; --green:#16a34a; --amber:#d97706;
  --grad:linear-gradient(135deg,#7c6af7,#06b6d4);
  --radius:16px; --maxw:1160px;
  --shadow:0 8px 30px rgba(20,22,40,.08);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;background:var(--bg);color:var(--text);
  font-family:'Manrope',-apple-system,Segoe UI,Roboto,sans-serif;
  line-height:1.55;-webkit-font-smoothing:antialiased;overflow-x:hidden;
}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
.container{max-width:var(--maxw);margin:0 auto;padding:0 22px}
.grad-text{background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.muted{color:var(--muted)}

/* Header */
.hdr{position:sticky;top:0;z-index:50;backdrop-filter:blur(12px);
  background:rgba(255,255,255,.82);border-bottom:1px solid var(--border)}
.hdr .container{display:flex;align-items:center;gap:26px;height:66px}
.logo{display:flex;align-items:center;gap:10px;font-weight:800;font-size:19px;letter-spacing:-.02em}
.logo .mark{width:32px;height:32px;border-radius:9px;background:var(--grad);display:grid;place-items:center;color:#fff;font-weight:900;font-size:17px}
.nav{display:flex;gap:24px;margin-left:8px}
.nav a{color:var(--muted);font-size:14.5px;font-weight:600;transition:color .15s}
.nav a:hover{color:var(--text)}
.dropdown{position:relative}
.drop-toggle{color:var(--muted);font-size:14.5px;font-weight:600;cursor:pointer;transition:color .15s;user-select:none}
.dropdown:hover .drop-toggle,.drop-toggle:focus{color:var(--text)}
.drop-menu{position:absolute;top:calc(100% + 10px);left:-10px;background:#fff;border:1px solid var(--border);
  border-radius:14px;padding:8px;min-width:246px;box-shadow:var(--shadow);display:none;flex-direction:column;gap:1px;z-index:60}
.dropdown:hover .drop-menu,.drop-toggle:focus + .drop-menu{display:flex}
.drop-menu::before{content:"";position:absolute;top:-10px;left:0;right:0;height:10px}
.drop-menu a{padding:10px 13px;border-radius:9px;font-size:14px;color:var(--text)!important;font-weight:600;white-space:nowrap}
.drop-menu a:hover{background:var(--bg-soft);color:var(--accent)!important}
.hdr .right{margin-left:auto;display:flex;align-items:center;gap:12px}
.btn{display:inline-flex;align-items:center;gap:8px;border:none;cursor:pointer;
  font-weight:700;font-size:14.5px;border-radius:11px;padding:11px 20px;transition:transform .12s,box-shadow .15s,opacity .15s;font-family:inherit}
.btn:hover{transform:translateY(-1px)}
.btn-primary{background:var(--grad);color:#fff;box-shadow:0 6px 22px rgba(124,106,247,.35)}
.btn-ghost{background:transparent;color:var(--text);border:1px solid var(--border)}
.btn-ghost:hover{border-color:var(--accent)}
.btn-lg{padding:14px 26px;font-size:16px;border-radius:13px}
.burger{display:none;background:none;border:none;color:var(--text);cursor:pointer;font-size:24px;margin-left:auto}

/* Hero */
.hero{position:relative;padding:86px 0 70px;text-align:center;overflow:hidden}
.hero::before{content:"";position:absolute;top:-260px;left:50%;transform:translateX(-50%);
  width:900px;height:900px;background:radial-gradient(circle,rgba(124,106,247,.12),transparent 62%);pointer-events:none}
.hero .badge{display:inline-flex;align-items:center;gap:8px;background:var(--bg-soft);border:1px solid var(--border);
  border-radius:30px;padding:7px 16px;font-size:13px;color:var(--muted);margin-bottom:22px}
.hero h1{font-size:clamp(34px,5.4vw,60px);line-height:1.06;letter-spacing:-.03em;margin:0 0 18px;font-weight:800}
.hero p.sub{font-size:clamp(16px,2vw,20px);color:var(--muted);max-width:680px;margin:0 auto 30px}
.hero .cta{display:flex;gap:14px;justify-content:center;flex-wrap:wrap}
.hero .note{margin-top:16px;font-size:13px;color:var(--muted-2)}

/* Stats */
.stats{display:flex;gap:12px;justify-content:center;flex-wrap:wrap;margin-top:52px}
.stat{background:var(--card);border:1px solid var(--border);border-radius:14px;padding:16px 26px;min-width:150px}
.stat b{display:block;font-size:26px;font-weight:800}
.stat span{font-size:13px;color:var(--muted)}

/* Sections */
section{padding:70px 0}
.sec-head{text-align:center;max-width:640px;margin:0 auto 44px}
.sec-head .kicker{color:var(--accent);font-weight:700;font-size:13.5px;letter-spacing:.08em;text-transform:uppercase}
.sec-head h2{font-size:clamp(26px,3.6vw,40px);letter-spacing:-.02em;margin:10px 0 12px;font-weight:800}
.sec-head p{color:var(--muted);font-size:16px;margin:0}

/* Tools grid */
.grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.tool{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:22px;
  transition:transform .14s,border-color .14s,box-shadow .14s;position:relative;display:block}
.tool:hover{transform:translateY(-3px);border-color:var(--accent);box-shadow:var(--shadow)}
.tool .ico{width:46px;height:46px;border-radius:12px;display:grid;place-items:center;font-size:23px;margin-bottom:14px;background:var(--card-2)}
.tool h3{margin:0 0 7px;font-size:18px;font-weight:700}
.tool p{margin:0;color:var(--muted);font-size:14px}
.tool .more{margin-top:14px;color:var(--accent);font-weight:700;font-size:13.5px;display:inline-flex;align-items:center;gap:5px}
.tool .soon{position:absolute;top:16px;right:16px;font-size:11px;font-weight:700;color:var(--amber);background:rgba(245,158,11,.12);border-radius:20px;padding:2px 9px}

/* Steps */
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;counter-reset:s}
.step{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:22px}
.step .n{width:34px;height:34px;border-radius:10px;background:var(--grad);color:#fff;font-weight:800;display:grid;place-items:center;margin-bottom:12px}
.step h4{margin:0 0 6px;font-size:16px}
.step p{margin:0;color:var(--muted);font-size:13.5px}

/* CTA band */
.cta-band{background:linear-gradient(135deg,rgba(124,106,247,.07),rgba(6,182,212,.05));border:1px solid var(--border);border-radius:24px;padding:48px 30px;text-align:center;position:relative;overflow:hidden}
.cta-band::before{content:"";position:absolute;inset:0;background:radial-gradient(circle at 50% -20%,rgba(124,106,247,.12),transparent 55%)}
.cta-band h2{font-size:clamp(24px,3.4vw,36px);margin:0 0 12px;font-weight:800;position:relative}
.cta-band p{color:var(--muted);margin:0 0 24px;position:relative}
.cta-band .cta{display:flex;gap:14px;justify-content:center;flex-wrap:wrap;position:relative}

/* Pricing (для посадочных) */
.plans{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
.plan{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:24px;display:flex;flex-direction:column}
.plan.hot{border-color:var(--accent);box-shadow:0 0 0 1px var(--accent)}
.plan .pn{font-weight:800;font-size:16px}
.plan .price{font-size:34px;font-weight:800;margin:8px 0 2px}
.plan .price small{font-size:14px;font-weight:500;color:var(--muted)}
.plan ul{list-style:none;padding:0;margin:16px 0 20px;display:flex;flex-direction:column;gap:9px}
.plan li{font-size:14px;display:flex;gap:9px;align-items:flex-start;color:var(--text)}
.plan li .x{color:var(--muted-2)}
.plan .btn{margin-top:auto;justify-content:center}

/* Split (текст + визуал/список) */
.split{display:grid;grid-template-columns:1fr 1fr;gap:34px;align-items:center}
.split.rev .txt{order:2}
.split h3{font-size:clamp(22px,3vw,30px);letter-spacing:-.02em;margin:0 0 14px;font-weight:800}
.split p{color:var(--muted);font-size:15.5px;margin:0 0 14px}
.split ul{list-style:none;padding:0;margin:0;display:flex;flex-direction:column;gap:10px}
.split li{display:flex;gap:10px;font-size:14.5px}
.split li b{font-weight:700}
.chk{color:var(--green);flex-shrink:0;margin-top:2px}
.panel{background:var(--card);border:1px solid var(--border);border-radius:18px;padding:22px;box-shadow:var(--shadow)}

/* Prose (SEO-контент) */
.prose{max-width:760px;margin:0 auto;color:var(--muted);font-size:15.5px;line-height:1.7}
.prose h2{color:var(--text);font-size:24px;margin:32px 0 12px;letter-spacing:-.01em}
.prose h3{color:var(--text);font-size:18px;margin:22px 0 8px}
.prose p{margin:0 0 14px}
.prose ul{margin:0 0 14px;padding-left:20px}
.prose li{margin:6px 0}
.prose b{color:var(--text)}

/* Сравнение */
.cmp{width:100%;border-collapse:collapse;font-size:14.5px;background:var(--card);border:1px solid var(--border);border-radius:14px;overflow:hidden}
.cmp th,.cmp td{padding:13px 16px;text-align:left;border-bottom:1px solid var(--border)}
.cmp thead th{background:var(--card-2);font-weight:700}
.cmp thead th.us{color:var(--accent)}
.cmp th.c,.cmp td.c{text-align:center}
.cmp tr:last-child td{border-bottom:none}
.yes{color:var(--green);font-weight:700}
.no{color:var(--muted-2)}

/* FAQ */
.faq{max-width:760px;margin:0 auto;display:flex;flex-direction:column;gap:10px}
.faq details{background:var(--card);border:1px solid var(--border);border-radius:12px;padding:2px 18px}
.faq summary{cursor:pointer;padding:15px 0;font-weight:700;font-size:15.5px;list-style:none;display:flex;justify-content:space-between;align-items:center}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";color:var(--accent);font-size:22px;font-weight:400}
.faq details[open] summary::after{content:"–"}
.faq details p{margin:0 0 16px;color:var(--muted);font-size:14.5px;line-height:1.65}

@media(max-width:860px){
  .split{grid-template-columns:1fr;gap:20px}
  .split.rev .txt{order:0}
  .cmp{font-size:13px}
  .cmp th,.cmp td{padding:10px}
}

/* Карточки-возможности (квадратные, весь список сразу виден) */
.fgrid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;max-width:1120px;margin:0 auto}
.fcard{background:var(--card);border:1px solid var(--border);border-radius:18px;padding:26px 24px;transition:transform .14s,border-color .14s,box-shadow .14s}
.fcard:hover{border-color:var(--accent);box-shadow:var(--shadow);transform:translateY(-4px)}
.fc-ico{width:54px;height:54px;border-radius:15px;display:grid;place-items:center;font-size:27px;background:var(--bg-soft);margin-bottom:16px}
.fc-t{font-weight:700;font-size:17.5px;letter-spacing:-.01em;margin-bottom:9px;line-height:1.25}
.fc-intro{color:var(--muted);font-size:14px;line-height:1.55;margin-bottom:15px}
.fc-body{border-top:1px solid var(--border);padding-top:15px}
.fc-body ul{margin:0;padding-left:18px;display:flex;flex-direction:column;gap:9px;color:var(--muted);font-size:13.5px;line-height:1.5}
.fc-body b{color:var(--text)}
@media(max-width:900px){.fgrid{grid-template-columns:repeat(2,1fr)}}
@media(max-width:600px){.fgrid{grid-template-columns:1fr}}

/* Бейдж «Скоро» на карточках инструментов в разработке */
.soon{display:inline-block;font-size:11px;font-weight:700;color:var(--accent);background:var(--bg-soft);border:1px solid var(--border);border-radius:20px;padding:2px 9px;vertical-align:middle;margin-left:6px;letter-spacing:.02em}

/* Аккордеоны-возможности (старый вариант, не используется) */
.accgrid{max-width:840px;margin:0 auto;display:flex;flex-direction:column;gap:10px}
.acc{background:var(--card);border:1px solid var(--border);border-radius:14px;overflow:hidden;transition:border-color .14s}
.acc:hover{border-color:var(--accent)}
.acc summary{cursor:pointer;padding:16px 18px;font-weight:700;font-size:16px;display:flex;align-items:center;gap:13px;list-style:none}
.acc summary::-webkit-details-marker{display:none}
.acc summary::after{content:"+";margin-left:auto;color:var(--accent);font-size:24px;font-weight:400;line-height:1}
.acc[open] summary::after{content:"–"}
.acc[open] summary{border-bottom:1px solid var(--border)}
.acc-ico{width:40px;height:40px;border-radius:11px;display:grid;place-items:center;font-size:20px;background:var(--bg-soft);flex-shrink:0}
.acc-body{padding:15px 20px 20px 71px;color:var(--muted);font-size:14.5px;line-height:1.6}
.acc-body p{margin:0 0 11px}
.acc-body ul{margin:0;padding-left:18px;display:flex;flex-direction:column;gap:8px}
.acc-body b{color:var(--text)}
@media(max-width:560px){.acc-body{padding:14px 16px 18px 16px}}

/* Блок самообучения */
.learn{max-width:900px;margin:0 auto;background:linear-gradient(135deg,rgba(124,106,247,.09),rgba(6,182,212,.06));
  border:1px solid var(--border);border-radius:22px;padding:34px 30px}
.learn .tag{display:inline-flex;align-items:center;gap:8px;background:#fff;border:1px solid var(--border);border-radius:30px;
  padding:6px 14px;font-size:12.5px;font-weight:700;color:var(--accent);margin-bottom:14px}
.learn h3{font-size:clamp(22px,3vw,30px);margin:0 0 10px;letter-spacing:-.02em}
.learn p{color:var(--muted);font-size:15px;margin:0 0 18px;max-width:680px}
.lsteps{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:12px}
.lstep{background:#fff;border:1px solid var(--border);border-radius:14px;padding:16px}
.lstep b{display:block;font-size:14.5px;margin-bottom:5px}
.lstep span{color:var(--muted);font-size:13px}

/* Ценностный блок / сравнение с конкурентом */
.vprop{max-width:900px;margin:0 auto;background:var(--card);border:2px solid var(--accent);border-radius:22px;
  padding:34px 30px;text-align:center;position:relative;overflow:hidden}
.vprop::before{content:"";position:absolute;inset:0;background:radial-gradient(circle at 50% -10%,rgba(124,106,247,.10),transparent 60%)}
.vprop .in{position:relative}
.vprop h3{font-size:clamp(22px,3.2vw,32px);margin:0 0 14px;letter-spacing:-.02em}
.vprop .vrow{display:flex;gap:14px;justify-content:center;flex-wrap:wrap;margin:18px 0}
.vcard{flex:1;min-width:210px;max-width:300px;border-radius:16px;padding:20px;text-align:left}
.vcard.them{background:var(--bg-soft);border:1px solid var(--border)}
.vcard.us{background:linear-gradient(135deg,rgba(124,106,247,.12),rgba(6,182,212,.08));border:1px solid var(--accent)}
.vcard .lbl{font-size:12.5px;font-weight:700;text-transform:uppercase;letter-spacing:.05em;color:var(--muted-2);margin-bottom:6px}
.vcard .big{font-size:30px;font-weight:800;letter-spacing:-.02em}
.vcard .sm{font-size:13.5px;color:var(--muted);margin-top:6px}
.vcard.us .big{color:var(--accent)}

/* Footer */
.ftr{border-top:1px solid var(--border);padding:50px 0 34px;margin-top:40px}
.ftr .cols{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:26px;margin-bottom:34px}
.ftr h5{font-size:13px;text-transform:uppercase;letter-spacing:.06em;color:var(--muted-2);margin:0 0 14px}
.ftr a{display:block;color:var(--muted);font-size:14px;padding:5px 0;transition:color .15s}
.ftr a:hover{color:var(--text)}
.ftr .legal{color:var(--muted-2);font-size:12.5px;border-top:1px solid var(--border);padding-top:20px;line-height:1.7}

@media(max-width:860px){
  .nav{display:none}
  .grid,.steps,.plans{grid-template-columns:1fr 1fr}
  .ftr .cols{grid-template-columns:1fr 1fr}
  .hdr .right .btn-ghost{display:none}
}
@media(max-width:560px){
  .grid,.steps,.plans,.ftr .cols{grid-template-columns:1fr}
  .burger{display:block}
  .hero{padding:60px 0 50px}
  section{padding:52px 0}
}
@media(max-width:860px){
  .nav.open{display:flex;position:absolute;top:66px;left:0;right:0;flex-direction:column;gap:0;
    background:#fff;border-bottom:1px solid var(--border);padding:8px 22px;max-height:80vh;overflow-y:auto}
  .nav.open > a{padding:12px 0;border-bottom:1px solid var(--border)}
  .nav.open .dropdown{width:100%}
  .nav.open .drop-toggle{display:block;padding:12px 0;border-bottom:1px solid var(--border)}
  .nav.open .drop-menu{position:static;display:flex;box-shadow:none;border:none;padding:4px 0 8px 10px;min-width:0}
  .nav.open .drop-menu a{white-space:normal;padding:8px 8px}
}