/* =========================================================
   SIDORENKO SCHOOL — фирменный стиль (по брендбуку 2022)
   Цвета: red #ed1c24 · navy #001c54 · ink #231f20
   Шрифт: Montserrat (Arial — fallback)
   Основа сайта: белый. Акценты: градиент navy→red.
   ========================================================= */

:root{
  --red:#ed1c24;
  --red-dark:#c8141b;
  --navy:#001c54;
  --navy-2:#0a2a6e;
  --ink:#231f20;
  --gray:#5b6172;
  --gray-light:#8b91a3;
  --line:#e6e8ef;
  --bg:#ffffff;
  --bg-soft:#f5f7fb;
  --bg-soft-2:#eef1f8;
  --grad:linear-gradient(120deg,#001c54 0%,#0a2a6e 38%,#7a1340 70%,#ed1c24 100%);
  --grad-btn:linear-gradient(120deg,#ed1c24 0%,#c8141b 100%);
  --shadow-sm:0 2px 10px rgba(0,28,84,.06);
  --shadow:0 18px 50px rgba(0,28,84,.12);
  --shadow-red:0 14px 30px rgba(237,28,36,.30);
  --radius:18px;
  --radius-sm:12px;
  --container:1180px;
  --font:'Montserrat',Arial,'Helvetica Neue',sans-serif;
}

*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  font-family:var(--font);
  color:var(--ink);
  background:var(--bg);
  font-size:17px;
  line-height:1.6;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
h1,h2,h3,h4{font-weight:800;line-height:1.12;letter-spacing:-.02em;margin:0 0 .5em;color:var(--navy)}
h1{font-size:clamp(32px,5vw,56px);text-wrap:balance}
h2{font-size:clamp(27px,3.6vw,42px);text-wrap:balance}
h3{font-size:clamp(20px,2.2vw,26px)}
p{margin:0 0 1em}
.accent{color:var(--red)}
.muted{color:var(--gray)}

.container{max-width:var(--container);margin:0 auto;padding:0 24px}
.section{padding:84px 0}
.section--soft{background:var(--bg-soft)}
.center{text-align:center}
.eyebrow{
  display:inline-flex;align-items:center;gap:9px;
  font-size:13px;font-weight:700;letter-spacing:.14em;text-transform:uppercase;
  color:var(--red);margin-bottom:16px;
}
.eyebrow::before{content:"";width:26px;height:2px;background:var(--red);display:inline-block}
.lead{font-size:clamp(17px,1.6vw,20px);color:var(--gray);max-width:62ch}
.section .lead.center{margin-left:auto;margin-right:auto}

/* ---------- Buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:10px;
  font-family:var(--font);font-weight:700;font-size:16px;letter-spacing:.01em;
  padding:16px 32px;border-radius:999px;border:0;cursor:pointer;
  transition:transform .18s ease,box-shadow .18s ease,background .18s ease;
  text-align:center;line-height:1.2;
}
.btn--primary{background:var(--grad-btn);color:#fff;box-shadow:var(--shadow-red)}
.btn--primary:hover{transform:translateY(-2px);box-shadow:0 18px 40px rgba(237,28,36,.42)}
.btn--navy{background:var(--navy);color:#fff}
.btn--navy:hover{transform:translateY(-2px);background:var(--navy-2)}
.btn--ghost{background:transparent;color:#fff;border:1.5px solid rgba(255,255,255,.55)}
.btn--ghost:hover{background:rgba(255,255,255,.12)}
.btn--lg{padding:19px 42px;font-size:18px}
.btn--block{display:flex;width:100%}

/* ---------- Header ---------- */
.header{
  position:sticky;top:0;z-index:50;background:rgba(255,255,255,.92);
  backdrop-filter:saturate(160%) blur(10px);border-bottom:1px solid var(--line);
}
.header__inner{display:flex;align-items:center;justify-content:space-between;height:74px;gap:20px}
.logo{display:flex;align-items:center}
.logo img{height:40px;width:auto}
.header__contacts{display:flex;align-items:center;gap:22px}
.header__phone{font-weight:700;color:var(--navy);white-space:nowrap}
.header__phone span{display:block;font-size:12px;font-weight:600;color:var(--gray-light);letter-spacing:.02em}

/* ---------- Hero (VSL) ---------- */
.hero{position:relative;background:var(--grad);color:#fff;overflow:hidden;padding:70px 0 90px}
.hero::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background:
    linear-gradient(105deg,transparent 46%,rgba(255,255,255,.05) 46.4%,rgba(255,255,255,.05) 48%,transparent 48.4%),
    linear-gradient(115deg,transparent 60%,rgba(237,28,36,.18) 60.3%,transparent 72%);
}
.hero__inner{position:relative;z-index:2;max-width:900px;margin:0 auto;text-align:center}
.hero h1{color:#fff;text-shadow:0 2px 30px rgba(0,0,0,.18)}
.hero h1 .accent{color:#ff5a60}
.hero__sub{font-size:clamp(17px,1.7vw,21px);color:rgba(255,255,255,.86);max-width:60ch;margin:0 auto 28px}
.step-badge{
  display:inline-flex;align-items:center;gap:10px;background:rgba(255,255,255,.12);
  border:1px solid rgba(255,255,255,.25);padding:8px 18px;border-radius:999px;
  font-weight:700;font-size:14px;letter-spacing:.06em;text-transform:uppercase;margin-bottom:22px;
}
.step-badge b{color:#ff8a8f}

/* Video player */
.video{
  position:relative;max-width:840px;margin:34px auto 0;border-radius:var(--radius);
  overflow:hidden;box-shadow:0 30px 70px rgba(0,0,0,.35);background:#000;
  aspect-ratio:16/9;border:1px solid rgba(255,255,255,.12);
}
.video--embed{aspect-ratio:auto}
.video iframe,.video video{position:absolute;inset:0;width:100%;height:100%;border:0}
.video__poster{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;cursor:pointer}
.video__overlay{
  position:absolute;inset:0;display:flex;align-items:center;justify-content:center;cursor:pointer;
  background:linear-gradient(to top,rgba(0,28,84,.5),rgba(0,28,84,.05));transition:background .25s;
}
.video__overlay:hover{background:linear-gradient(to top,rgba(0,28,84,.6),rgba(0,28,84,.15))}
.video__play{
  width:84px;height:84px;border-radius:50%;background:var(--grad-btn);
  display:flex;align-items:center;justify-content:center;box-shadow:var(--shadow-red);
  transition:transform .2s;
}
.video__overlay:hover .video__play{transform:scale(1.08)}
.video__play svg{margin-left:4px}
.video__note{margin-top:18px;color:rgba(255,255,255,.78);font-size:14px;font-weight:600;letter-spacing:.04em}

/* ---------- Value bullets ---------- */
.values{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;margin-top:46px}
.value{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:30px 26px;
  box-shadow:var(--shadow-sm);transition:transform .2s,box-shadow .2s;
}
.value:hover{transform:translateY(-4px);box-shadow:var(--shadow)}
.value__icon{
  width:52px;height:52px;border-radius:14px;background:var(--bg-soft-2);
  display:flex;align-items:center;justify-content:center;margin-bottom:16px;color:var(--red);
}
.value h3{font-size:19px;margin-bottom:8px}
.value p{margin:0;color:var(--gray);font-size:15.5px}

/* ---------- How it works ---------- */
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;margin-top:46px;counter-reset:s}
.stepcard{position:relative;padding:28px 22px;border-radius:var(--radius);background:#fff;border:1px solid var(--line);box-shadow:var(--shadow-sm)}
.stepcard::before{
  counter-increment:s;content:"0" counter(s);font-weight:800;font-size:34px;
  background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent;
  display:block;margin-bottom:8px;letter-spacing:-.02em;
}
.stepcard h3{font-size:18px;margin-bottom:6px}
.stepcard p{margin:0;color:var(--gray);font-size:15px}

/* ---------- Form section ---------- */
.cta-band{position:relative;background:var(--grad);color:#fff;overflow:hidden}
.cta-band::after{content:"";position:absolute;inset:0;background:linear-gradient(115deg,transparent 55%,rgba(237,28,36,.22) 55.4%,transparent 70%);pointer-events:none}
.cta-grid{position:relative;z-index:2;display:grid;grid-template-columns:1.05fr .95fr;gap:48px;align-items:center}
.cta-grid h2{color:#fff}
.cta-grid .lead{color:rgba(255,255,255,.84)}
.cta-list{list-style:none;padding:0;margin:22px 0 0}
.cta-list li{position:relative;padding-left:34px;margin-bottom:14px;font-weight:600}
.cta-list li::before{
  content:"";position:absolute;left:0;top:2px;width:22px;height:22px;border-radius:50%;
  background:var(--red);background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='14' height='14' viewBox='0 0 24 24' fill='none' stroke='white' stroke-width='3' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='20 6 9 17 4 12'/%3E%3C/svg%3E");
  background-repeat:no-repeat;background-position:center;
}

.form-card{background:#fff;border-radius:22px;padding:38px 34px;box-shadow:var(--shadow);color:var(--ink)}
.form-card h3{font-size:23px;text-align:center;margin-bottom:6px}
.form-card .form-sub{text-align:center;color:var(--gray);font-size:15px;margin-bottom:24px}
.field{margin-bottom:14px}
.field label{display:block;font-size:13px;font-weight:700;color:var(--navy);margin-bottom:6px}
.field input,.field select{
  width:100%;font-family:var(--font);font-size:16px;padding:14px 16px;border-radius:12px;
  border:1.5px solid var(--line);background:var(--bg-soft);transition:border .15s,background .15s;
}
.field input:focus,.field select:focus{outline:none;border-color:var(--navy);background:#fff}
/* Сегментированный выбор Да/Нет */
.choice{display:grid;grid-template-columns:1fr 1fr;gap:10px}
.choice__opt{position:relative;cursor:pointer;margin:0}
.choice__opt input{position:absolute;opacity:0;width:0;height:0}
.choice__opt span{
  display:block;text-align:center;font-size:15px;font-weight:700;color:var(--navy);
  padding:13px 16px;border-radius:12px;border:1.5px solid var(--line);background:var(--bg-soft);
  transition:border .15s,background .15s,color .15s;
}
.choice__opt:hover span{border-color:var(--navy)}
.choice__opt input:checked+span{border-color:var(--red);background:var(--red);color:#fff}
.choice__opt input:focus-visible+span{outline:2px solid var(--navy);outline-offset:2px}
.consent{display:flex;gap:10px;align-items:flex-start;font-size:12.5px;color:var(--gray);margin:6px 0 18px}
.consent input{margin-top:3px;width:16px;height:16px;flex:0 0 auto;accent-color:var(--red)}
.consent a{color:var(--navy);text-decoration:underline}
.form-note{text-align:center;font-size:12.5px;color:var(--gray-light);margin-top:14px}

/* ---------- Cases ---------- */
.tabs{display:inline-flex;gap:6px;background:var(--bg-soft-2);padding:6px;border-radius:999px;margin:0 auto 40px}
.tab{
  border:0;background:transparent;font-family:var(--font);font-weight:700;font-size:15px;
  padding:12px 28px;border-radius:999px;cursor:pointer;color:var(--gray);transition:all .2s;
}
.tab.is-active{background:#fff;color:var(--navy);box-shadow:var(--shadow-sm)}
.cases{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.cases[hidden]{display:none}
.case{
  position:relative;background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  overflow:hidden;box-shadow:var(--shadow-sm);transition:transform .2s,box-shadow .2s;
  display:flex;flex-direction:column;text-align:left;
}
.case:hover{transform:translateY(-4px);box-shadow:var(--shadow)}

/* video thumbnail */
.case__thumb{
  position:relative;display:block;width:100%;border:0;padding:0;cursor:pointer;margin:0;
  aspect-ratio:16/9;background:#0a1330;overflow:hidden;
}
.case__thumb img{width:100%;height:100%;object-fit:cover;transition:transform .45s ease}
.case__thumb:hover img{transform:scale(1.06)}
.case__thumb::after{content:"";position:absolute;inset:0;background:linear-gradient(to top,rgba(0,28,84,.5),rgba(0,28,84,.05) 55%)}
.case__play{
  position:absolute;left:50%;top:50%;transform:translate(-50%,-50%);z-index:2;
  width:62px;height:62px;border-radius:50%;background:var(--grad-btn);
  display:flex;align-items:center;justify-content:center;box-shadow:var(--shadow-red);transition:transform .2s;
}
.case__play svg{margin-left:3px}
.case__thumb:hover .case__play{transform:translate(-50%,-50%) scale(1.1)}
.case__badge{
  position:absolute;left:14px;top:14px;z-index:2;display:inline-flex;align-items:center;gap:6px;
  font-size:12px;font-weight:700;color:#fff;background:rgba(0,28,84,.55);padding:5px 12px;border-radius:999px;
  backdrop-filter:blur(4px);
}
.case__frame{position:relative;width:100%;aspect-ratio:16/9;background:#000}
.case__frame iframe{position:absolute;inset:0;width:100%;height:100%;border:0}

.case__body{padding:22px 24px 24px;display:flex;flex-direction:column;flex:1}
.case__quote{font-size:16px;font-weight:600;color:var(--ink);line-height:1.5;margin:0 0 18px;flex:1}
.case__quote::before{content:"“";color:var(--red);font-size:34px;font-weight:800;line-height:0;vertical-align:-10px;margin-right:3px}
.case__person{display:flex;align-items:center;gap:12px;border-top:1px solid var(--line);padding-top:16px}
.case__avatar{
  width:44px;height:44px;border-radius:50%;flex:0 0 auto;display:flex;align-items:center;justify-content:center;
  background:var(--grad);color:#fff;font-weight:800;font-size:17px;
}
.case__name{font-weight:700;color:var(--navy);line-height:1.2;font-size:15px}
.case__meta{font-size:13px;color:var(--gray)}

/* ---------- Founder ---------- */
.founder{display:grid;grid-template-columns:.85fr 1.15fr;gap:48px;align-items:center}
.founder__photo{position:relative;border-radius:22px;overflow:hidden;box-shadow:var(--shadow);background:var(--grad);aspect-ratio:4/5}
.founder__photo img{width:100%;height:100%;object-fit:cover}
.founder__ph-fallback{position:absolute;inset:0;display:grid;place-items:center;color:rgba(255,255,255,.7);font-weight:700;text-align:center;padding:30px;line-height:1.5}
.facts{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;margin:26px 0}
.fact b{display:block;font-size:34px;font-weight:800;background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent;line-height:1}
.fact span{font-size:14px;color:var(--gray)}

/* ---------- FAQ ---------- */
.faq{max-width:820px;margin:0 auto}
.faq__item{border:1px solid var(--line);border-radius:14px;margin-bottom:12px;background:#fff;overflow:hidden}
.faq__q{width:100%;text-align:left;background:none;border:0;font-family:var(--font);font-weight:700;
  font-size:17px;color:var(--navy);padding:20px 22px;cursor:pointer;display:flex;justify-content:space-between;gap:16px;align-items:center}
.faq__q::after{content:"+";font-size:24px;color:var(--red);transition:transform .2s;line-height:1}
.faq__item.is-open .faq__q::after{transform:rotate(45deg)}
.faq__a{max-height:0;overflow:hidden;transition:max-height .28s ease;color:var(--gray)}
.faq__a div{padding:0 22px 20px}

/* ---------- Footer ---------- */
.footer{background:var(--navy);color:rgba(255,255,255,.72);padding:56px 0 30px;font-size:15px}
.footer a:hover{color:#fff}
.footer__top{display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:40px;padding-bottom:34px;border-bottom:1px solid rgba(255,255,255,.12)}
.footer__logo img{height:42px;margin-bottom:16px}
.footer h4{color:#fff;font-size:15px;letter-spacing:.04em;text-transform:uppercase;margin-bottom:16px}
.footer__links{display:flex;flex-direction:column;gap:10px}
.footer__msgr{display:flex;gap:12px;margin-top:8px}
.footer__msgr a{width:42px;height:42px;border-radius:50%;background:rgba(255,255,255,.1);display:flex;align-items:center;justify-content:center;transition:background .2s}
.footer__msgr a:hover{background:var(--red)}
.footer__bottom{padding-top:24px;display:flex;justify-content:space-between;flex-wrap:wrap;gap:12px;font-size:13px;color:rgba(255,255,255,.5)}

/* ---------- Thank you page ---------- */
.thanks{min-height:calc(100vh - 74px);display:flex;align-items:center;background:var(--bg-soft);position:relative;overflow:hidden;padding:60px 0}
.thanks::before{content:"";position:absolute;top:-30%;right:-10%;width:60%;height:120%;background:var(--grad);opacity:.07;transform:skewX(-12deg)}
.thanks__card{position:relative;z-index:2;max-width:720px;margin:0 auto;text-align:center;background:#fff;border-radius:26px;box-shadow:var(--shadow);padding:54px 48px}
.thanks__check{width:92px;height:92px;border-radius:50%;background:var(--grad-btn);display:flex;align-items:center;justify-content:center;margin:0 auto 26px;box-shadow:var(--shadow-red)}
.thanks__steps{text-align:left;max-width:520px;margin:30px auto 0;display:grid;gap:16px}
.tstep{display:flex;gap:16px;align-items:flex-start}
.tstep__num{flex:0 0 auto;width:36px;height:36px;border-radius:50%;background:var(--bg-soft-2);color:var(--navy);font-weight:800;display:flex;align-items:center;justify-content:center}
.tstep b{color:var(--navy)}
.tstep p{margin:2px 0 0;color:var(--gray);font-size:15px}
.thanks__msgr{margin-top:34px;padding-top:28px;border-top:1px solid var(--line)}
.thanks__msgr-btns{display:flex;gap:14px;justify-content:center;flex-wrap:wrap;margin-top:14px}

/* ---------- Responsive ---------- */
@media (max-width:920px){
  .values,.cases,.steps{grid-template-columns:repeat(2,1fr)}
  .cta-grid,.founder{grid-template-columns:1fr;gap:32px}
  .footer__top{grid-template-columns:1fr 1fr}
  .facts{grid-template-columns:repeat(3,1fr)}
}
@media (max-width:620px){
  .section{padding:60px 0}
  .values,.cases,.steps{grid-template-columns:1fr}
  .header__phone{display:none}
  .footer__top{grid-template-columns:1fr}
  .form-card{padding:30px 22px}
  .thanks__card{padding:40px 24px}
  .tabs{display:flex;width:100%}
  .tab{flex:1;padding:12px 10px}
}