/* ============ OLEGFIT design system ============ */
:root{
  --bg:#f6f5f1;
  --surface:#ffffff;
  --ink:#1c221f;
  --ink-soft:#5b645f;
  --line:#e5e3dc;
  --brand:#14695a;
  --brand-dark:#0e4f44;
  --brand-soft:#e3efec;
  --accent:#f2b135;
  --wa:#25d366;
  --tg:#2aabee;
  --radius:18px;
  --shadow:0 10px 30px rgba(28,34,31,.08);
  --maxw:1080px;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:"Manrope","Segoe UI",system-ui,-apple-system,sans-serif;
  background:var(--bg);color:var(--ink);
  font-size:17px;line-height:1.65;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block}
a{color:var(--brand);text-decoration:none}
a:hover{color:var(--brand-dark)}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 20px}

h1,h2,h3{line-height:1.2;font-weight:800;letter-spacing:-.01em}
h1{font-size:clamp(1.9rem,4.5vw,3rem)}
h2{font-size:clamp(1.5rem,3vw,2.1rem)}
h3{font-size:1.15rem}
.muted{color:var(--ink-soft)}

/* ---------- header ---------- */
.header{
  position:sticky;top:0;z-index:50;
  background:rgba(246,245,241,.85);
  backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);
  border-bottom:1px solid var(--line);
}
.header__in{display:flex;align-items:center;gap:24px;height:66px}
.logo{font-weight:800;font-size:1.25rem;color:var(--ink);letter-spacing:-.02em}
.logo b{color:var(--brand)}
.nav{display:flex;gap:4px;margin-left:auto}
.nav a{
  padding:8px 14px;border-radius:999px;color:var(--ink);
  font-weight:600;font-size:.95rem;white-space:nowrap;
}
.nav a:hover{background:var(--brand-soft)}
.nav a.active{background:var(--brand);color:#fff}
.header .phone{font-weight:700;color:var(--ink);white-space:nowrap}
.burger{
  display:none;margin-left:auto;background:none;border:0;cursor:pointer;
  width:44px;height:44px;border-radius:12px;
}
.burger span{display:block;width:22px;height:2px;background:var(--ink);margin:5px auto;border-radius:2px;transition:.25s}
.menu-open .burger span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.menu-open .burger span:nth-child(2){opacity:0}
.menu-open .burger span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}

/* ---------- hero ---------- */
.hero{
  padding:72px 0 56px;
  background:
    radial-gradient(700px 360px at 85% -10%,rgba(20,105,90,.14),transparent 60%),
    radial-gradient(500px 300px at -5% 20%,rgba(242,177,53,.12),transparent 60%);
}
.hero .kicker{
  display:inline-block;background:var(--brand-soft);color:var(--brand-dark);
  font-weight:700;font-size:.85rem;padding:6px 14px;border-radius:999px;margin-bottom:18px;
}
.hero p.lead{font-size:1.15rem;color:var(--ink-soft);max-width:640px;margin-top:16px}
.hero__cta{display:flex;flex-wrap:wrap;gap:12px;margin-top:28px}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:13px 24px;border-radius:999px;font-weight:700;font-size:1rem;
  border:0;cursor:pointer;transition:.2s;font-family:inherit;
}
.btn--brand{background:var(--brand);color:#fff}
.btn--brand:hover{background:var(--brand-dark);color:#fff;transform:translateY(-1px)}
.btn--ghost{background:transparent;color:var(--ink);box-shadow:inset 0 0 0 2px var(--line)}
.btn--ghost:hover{box-shadow:inset 0 0 0 2px var(--brand);color:var(--brand)}
.btn--wa{background:var(--wa);color:#fff}
.btn--wa:hover{filter:brightness(.95);color:#fff}
.btn--tg{background:var(--tg);color:#fff}
.btn--tg:hover{filter:brightness(.95);color:#fff}
.btn[disabled]{opacity:.45;cursor:not-allowed;transform:none}

/* ---------- sections & cards ---------- */
.section{padding:56px 0}
.section--alt{background:var(--surface);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.section h2{margin-bottom:8px}
.section .sub{color:var(--ink-soft);max-width:640px;margin-bottom:32px}

.grid{display:grid;gap:20px}
.grid--2{grid-template-columns:repeat(2,1fr)}
.grid--3{grid-template-columns:repeat(3,1fr)}
.grid--4{grid-template-columns:repeat(4,1fr)}

.card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);
  padding:26px;box-shadow:var(--shadow);
  display:flex;flex-direction:column;gap:10px;
  transition:.2s;
}
a.card{color:var(--ink)}
a.card:hover{transform:translateY(-3px);border-color:var(--brand);color:var(--ink)}
.card .ico{width:46px;height:46px;margin-bottom:2px;transition:.2s}
a.card:hover .ico{transform:translateY(-2px) scale(1.06)}
.card h3{margin-top:2px}
.card p{color:var(--ink-soft);font-size:.95rem}
.card .more{margin-top:auto;font-weight:700;color:var(--brand);font-size:.95rem}

.pill{
  display:inline-block;background:var(--brand-soft);color:var(--brand-dark);
  border-radius:999px;padding:4px 12px;font-size:.82rem;font-weight:700;
}
.pill--warn{background:#fdeeee;color:#a03a3a}

/* ---------- сертификаты ---------- */
.cert{
  display:flex;flex-direction:column;text-align:left;cursor:pointer;padding:0;
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);
  box-shadow:var(--shadow);overflow:hidden;font:inherit;color:var(--ink);transition:.2s;
}
.cert:hover{transform:translateY(-3px);border-color:var(--brand)}
.cert:focus-visible{outline:3px solid var(--brand);outline-offset:2px}
/* height:auto обязателен: без него работает атрибут height из разметки, а
   aspect-ratio включается только когда одна сторона отдана на откуп браузеру */
.cert img{width:100%;height:auto;aspect-ratio:1.41;object-fit:cover;background:var(--bg);transition:.3s}
.cert:hover img{transform:scale(1.03)}
.cert__cap{display:block;padding:14px 16px;font-size:.83rem;line-height:1.45;color:var(--ink-soft)}
.cert__cap b{display:block;font-size:.95rem;color:var(--ink);margin-bottom:3px}

/* лайтбокс: разметки в HTML нет, оверлей собирает app.js по клику */
.lightbox{
  position:fixed;inset:0;z-index:100;display:flex;align-items:center;justify-content:center;
  padding:28px;background:rgba(14,21,19,.84);
  backdrop-filter:blur(4px);-webkit-backdrop-filter:blur(4px);
}
.lightbox img{
  max-width:min(1100px,100%);max-height:100%;width:auto;
  border-radius:10px;background:var(--surface);box-shadow:0 20px 60px rgba(0,0,0,.5);
}
.lightbox__close{
  position:absolute;top:16px;right:18px;width:44px;height:44px;border:0;border-radius:50%;
  cursor:pointer;background:rgba(255,255,255,.92);color:var(--ink);
  font:inherit;font-size:1.35rem;line-height:1;transition:.2s;
}
.lightbox__close:hover{background:#fff}
.lightbox__close:focus-visible{outline:3px solid var(--brand);outline-offset:2px}
/* прокрутку страницы гасим на время показа; отступ вместо полосы ставит app.js */
.lb-open{overflow:hidden}

/* ---------- info blocks on lesson pages ---------- */
.lesson-head{padding:56px 0 8px}
.lesson-head .crumbs{font-size:.9rem;margin-bottom:14px}
.lesson-head .crumbs a{color:var(--ink-soft)}
.lesson-head .crumbs a:hover{color:var(--brand)}
.facts{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin:30px 0 8px}
.fact{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:18px 20px}
.fact b{display:block;font-size:.8rem;text-transform:uppercase;letter-spacing:.06em;color:var(--brand);margin-bottom:6px}
.fact ul{padding-left:18px}
.fact li{font-size:.93rem;color:var(--ink-soft);margin:3px 0}
.fact p{font-size:.93rem;color:var(--ink-soft)}
.note-warn{
  background:#fdf6ec;border:1px solid #f2dfc0;border-radius:var(--radius);
  padding:16px 20px;font-size:.95rem;color:#7c5a1e;margin-top:16px;
}
.note-warn::before{
  content:"";display:inline-block;vertical-align:-4px;
  width:19px;height:19px;margin-right:9px;background:no-repeat center/contain;
  background-image:url("data:image/svg+xml,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23b8862a' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'><path d='M12 3.6 22.2 20.4H1.8z'/><path d='M12 10v4.4'/><path d='M12 17.8h.01'/></svg>");
}

/* ---------- lesson progress & quick-nav ---------- */
.lesson-progress{
  display:flex;align-items:center;gap:14px;
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);
  padding:14px 18px;margin-bottom:18px;
}
.lesson-progress b{font-size:.92rem;white-space:nowrap}
.lesson-progress .bar{flex:1;height:8px;background:var(--line);border-radius:99px;overflow:hidden}
.lesson-progress .bar i{display:block;height:100%;width:0;background:var(--brand);border-radius:99px;transition:.35s}
.lesson-progress .reset{
  background:none;border:0;cursor:pointer;font:inherit;font-size:.85rem;
  color:var(--ink-soft);text-decoration:underline;white-space:nowrap;padding:4px;
}
.lesson-progress .reset:hover{color:var(--brand)}

.exnav{
  display:flex;gap:8px;overflow-x:auto;margin-bottom:26px;
  padding-bottom:6px;scrollbar-width:none;-webkit-overflow-scrolling:touch;
}
.exnav::-webkit-scrollbar{display:none}
.exnav a{
  flex:0 0 auto;display:inline-flex;align-items:center;gap:7px;
  padding:9px 15px;border-radius:999px;
  background:var(--surface);border:1px solid var(--line);
  font-size:.88rem;font-weight:600;color:var(--ink);white-space:nowrap;transition:.15s;
}
.exnav a:hover{border-color:var(--brand);color:var(--brand-dark)}
.exnav a i{
  font-style:normal;display:inline-flex;align-items:center;justify-content:center;
  width:20px;height:20px;border-radius:50%;font-size:.72rem;font-weight:800;
  background:var(--brand-soft);color:var(--brand-dark);
}
.exnav a.done{background:var(--brand-soft);border-color:var(--brand)}
.exnav a.done i{background:var(--brand);color:#fff}

/* ---------- exercise ---------- */
.exercise{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);
  box-shadow:var(--shadow);overflow:hidden;
  display:grid;grid-template-columns:1fr 1fr;
}
.exercise+.exercise{margin-top:28px}
.exercise.is-done{border-color:var(--brand);box-shadow:0 10px 30px rgba(20,105,90,.12)}
.exercise__media{position:relative;background:#0e1513;min-height:240px}
.exercise__media .num{
  position:absolute;z-index:2;top:12px;left:12px;pointer-events:none;
  background:rgba(255,255,255,.94);color:var(--brand-dark);
  font-weight:800;font-size:.8rem;padding:6px 13px;border-radius:999px;
  box-shadow:0 4px 14px rgba(0,0,0,.18);
}
.exercise__body{padding:26px 28px}
.exercise__num{
  display:inline-flex;align-items:center;gap:8px;
  color:var(--brand);font-weight:800;font-size:.85rem;
  text-transform:uppercase;letter-spacing:.08em;margin-bottom:6px;
}
.exercise__body h3{font-size:1.3rem;margin-bottom:12px}
.exercise__body ol{padding-left:20px;display:grid;gap:7px}
.exercise__body li{color:#39423d;font-size:.97rem}
.exercise__body li::marker{color:var(--brand);font-weight:700}
.exercise__meta{margin-top:14px;display:flex;flex-wrap:wrap;gap:8px}
.done-btn{
  margin-top:18px;display:inline-flex;align-items:center;gap:8px;
  padding:10px 18px;border-radius:999px;border:2px solid var(--line);
  background:transparent;font:inherit;font-weight:700;font-size:.92rem;
  cursor:pointer;color:var(--ink-soft);transition:.2s;
}
.done-btn:hover{border-color:var(--brand);color:var(--brand)}
.is-done .done-btn{background:var(--brand);border-color:var(--brand);color:#fff}

/* lazy video */
.video{position:absolute;inset:0;cursor:pointer;overflow:hidden}
.video img{width:100%;height:100%;object-fit:cover;opacity:.85;transition:.3s}
.video:hover img{opacity:1;transform:scale(1.03)}
.video iframe{position:absolute;inset:0;width:100%;height:100%;border:0}
.video__play{
  position:absolute;left:50%;top:50%;transform:translate(-50%,-50%);
  width:64px;height:64px;border-radius:50%;border:0;cursor:pointer;
  background:rgba(255,255,255,.92);color:var(--brand-dark);
  display:flex;align-items:center;justify-content:center;
  box-shadow:0 8px 24px rgba(0,0,0,.3);transition:.2s;
}
.video__play svg{width:22px;height:22px;margin-left:3px}
.video:hover .video__play{transform:translate(-50%,-50%) scale(1.08);background:#fff}

/* ---------- steps (how it works) ---------- */
.steps{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;counter-reset:step}
.step{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:24px}
.step::before{
  counter-increment:step;content:counter(step);
  display:inline-flex;align-items:center;justify-content:center;
  width:36px;height:36px;border-radius:50%;
  background:var(--brand);color:#fff;font-weight:800;margin-bottom:14px;
}
.step h3{font-size:1.05rem;margin-bottom:6px}
.step p{font-size:.93rem;color:var(--ink-soft)}

/* ---------- quiz (anketa) ---------- */
.quiz{max-width:640px;margin:0 auto}
.quiz__progress{height:6px;background:var(--line);border-radius:99px;overflow:hidden;margin-bottom:8px}
.quiz__bar{height:100%;width:0;background:var(--brand);border-radius:99px;transition:.3s}
.quiz__count{font-size:.85rem;color:var(--ink-soft);margin-bottom:22px}
.quiz__card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);
  box-shadow:var(--shadow);padding:32px;
}
.quiz__card h3{font-size:1.3rem;margin-bottom:6px}
.quiz__card .hint{color:var(--ink-soft);font-size:.95rem;margin-bottom:20px}
.quiz__choices{display:flex;gap:10px;margin-bottom:16px}
.choice{
  flex:1;padding:13px;border-radius:14px;border:2px solid var(--line);
  background:var(--bg);font-family:inherit;font-size:1rem;font-weight:700;cursor:pointer;transition:.15s;
}
.choice:hover{border-color:var(--brand)}
.choice.on{border-color:var(--brand);background:var(--brand-soft);color:var(--brand-dark)}
.quiz input[type=text],.quiz input[type=tel],.quiz input[type=number],.quiz textarea{
  width:100%;padding:13px 16px;border-radius:14px;border:2px solid var(--line);
  font-family:inherit;font-size:1rem;background:var(--bg);color:var(--ink);
}
.quiz textarea{min-height:84px;resize:vertical}
.quiz input:focus,.quiz textarea:focus{outline:none;border-color:var(--brand)}
.quiz input[aria-invalid=true]{border-color:#c96a6a}
.quiz__contact{display:grid;gap:6px;margin:18px 0 4px}
.quiz__contact label{font-weight:700;font-size:.92rem}
.quiz__contact label+input{margin-bottom:10px}
.quiz__contact .hint{margin-bottom:0} /* перебиваем .quiz__card .hint выше */
.quiz__nav{display:flex;justify-content:space-between;gap:12px;margin-top:24px}
.quiz__result{white-space:pre-wrap;background:var(--bg);border:1px dashed var(--line);border-radius:14px;padding:18px;font-size:.9rem;max-height:300px;overflow:auto;margin:18px 0}
.quiz__send{display:flex;flex-wrap:wrap;gap:12px}

/* ---------- contacts / footer ---------- */
.contact-links{display:flex;flex-wrap:wrap;gap:12px;margin-top:20px}
.footer{padding:44px 0;color:var(--ink-soft);font-size:.92rem}
.footer .wrap{display:flex;flex-wrap:wrap;gap:16px;align-items:center;justify-content:space-between}
.footer a{color:var(--ink-soft)}
.footer a:hover{color:var(--brand)}

/* ---------- responsive ---------- */
@media (max-width:860px){
  .grid--3{grid-template-columns:repeat(2,1fr)}
  .grid--4{grid-template-columns:repeat(2,1fr)}
  .steps{grid-template-columns:1fr}
  .facts{grid-template-columns:1fr}
  .exercise{grid-template-columns:1fr}
  .exercise__media{min-height:0;aspect-ratio:16/9}
}
@media (max-width:680px){
  body{font-size:16px}
  /* .grid--4 намеренно остаётся в две колонки: два скана в ряд читаются
     лучше одного во всю ширину, а подпись под ними и так полноразмерная */
  .grid--2,.grid--3{grid-template-columns:1fr}
  .cert__cap{padding:12px 13px}
  .lightbox{padding:12px}
  .lightbox__close{top:8px;right:8px;width:40px;height:40px}
  .header .phone{display:none}
  .burger{display:block}
  .nav{
    display:none;position:absolute;top:66px;left:0;right:0;
    flex-direction:column;background:var(--surface);
    border-bottom:1px solid var(--line);padding:12px 20px 20px;gap:6px;
  }
  .menu-open .nav{display:flex}
  .nav a{padding:12px 14px;border-radius:12px}
  .hero{padding:48px 0 40px}
  .quiz__card{padding:24px 20px}
  .quiz__choices{flex-direction:column}
  /* уроки на мобильном */
  .lesson-head{padding:36px 0 4px}
  .section{padding:40px 0}
  .card{padding:20px}
  .fact{padding:15px 16px}
  .exercise+.exercise{margin-top:18px}
  .exercise__body{padding:20px 18px 22px}
  .exercise__body h3{font-size:1.12rem}
  .exercise__body ol{padding-left:18px;gap:6px}
  .exercise__body li{font-size:.92rem}
  .video__play{width:54px;height:54px}
  .lesson-progress{padding:12px 14px;gap:10px;flex-wrap:wrap}
  .lesson-progress .bar{min-width:100%;order:3}
  .done-btn{width:100%;justify-content:center}
}