:root{
  --bg:#0c0f14;
  --panel:#111623;
  --text:#e9edf5;
  --muted:#9ea4b5;
  --border:rgba(255,255,255,.10);
  --accent:#6b7bff;
  --accent2:#f2c98b;
  --shadow: 0 16px 44px rgba(0,0,0,.45);
}
*{box-sizing:border-box}
html,body{margin:0;padding:0;font-family:system-ui,-apple-system,Segoe UI,Roboto,Inter,Ubuntu,Helvetica,Arial,sans-serif;background:var(--bg);color:var(--text);line-height:1.55}
a{color:inherit}
.lp-container{max-width:1120px;margin:0 auto;padding:0 20px}

.lp-header{position:sticky;top:0;z-index:50;background:rgba(12,15,20,.72);backdrop-filter:saturate(140%) blur(14px);border-bottom:1px solid var(--border)}
.lp-header__inner{display:flex;align-items:center;justify-content:space-between;padding:14px 0;gap:12px}
.lp-brand__name{font-weight:900;letter-spacing:.06em}
.lp-brand__sub{font-size:12px;opacity:.65;margin-top:2px}
.lp-header__actions{display:flex;align-items:center;gap:10px;flex-wrap:wrap;justify-content:flex-end}
.lp-link{opacity:.9;text-decoration:none}
.lp-link:hover{opacity:1;text-decoration:underline}
.lp-link--muted{color:var(--muted)}
.lp-link--muted:hover{color:var(--text)}

.lp-btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;border-radius:12px;padding:12px 16px;border:1px solid var(--border);text-decoration:none;cursor:pointer;font-weight:700}
.lp-btn--primary{background:linear-gradient(135deg,var(--accent),#8f9aff);border-color:rgba(107,123,255,.85);box-shadow:0 10px 28px rgba(107,123,255,.28)}
.lp-btn--primary:hover{filter:brightness(1.04)}
.lp-btn--ghost{background:rgba(255,255,255,.04)}
.lp-btn--ghost:hover{background:rgba(255,255,255,.06)}
.lp-btn--full{width:100%}
.lp-btn--lg{padding:14px 20px;font-size:15px;border-radius:14px}

html{scroll-behavior:smooth}
#lead{scroll-margin-top:88px}

.lp-hero{position:relative;overflow:hidden}
.lp-hero__media{
  position:absolute;inset:0;
  background:
    radial-gradient(900px 600px at 20% 10%, rgba(107,123,255,.18), transparent 60%),
    radial-gradient(700px 500px at 70% 20%, rgba(242,201,139,.10), transparent 55%),
    url("/static/images/portfolio/metallokarkas-lestnitsy/cover.jpg");
  background-size:cover;
  background-position:center;
  filter:saturate(1.08) contrast(1.05);
  transform:scale(1.03);
}
.lp-hero__shade{position:absolute;inset:0;background:linear-gradient(90deg, rgba(12,15,20,.96) 0%, rgba(12,15,20,.70) 55%, rgba(12,15,20,.92) 100%)}
.lp-hero__grid{position:relative;display:grid;grid-template-columns:1.2fr .8fr;gap:22px;padding:54px 0}
.lp-kicker{color:var(--accent2);font-weight:800;letter-spacing:.08em;text-transform:uppercase;font-size:12px;margin:0 0 10px}
.lp-h1{font-size:40px;line-height:1.12;margin:0 0 12px}
.lp-lead{color:#cfd6ea;margin:0 0 14px;font-size:15.5px;max-width:620px}
.lp-bullets{margin:0 0 18px;padding-left:18px;color:#cfd6ea}
.lp-bullets li{margin:6px 0}
.lp-hero__cta{display:flex;gap:12px;flex-wrap:wrap;align-items:center}
.lp-note{margin:12px 0 0;color:var(--muted);font-size:13px}

.lp-card{background:rgba(17,22,35,.84);border:1px solid var(--border);border-radius:16px;box-shadow:var(--shadow);padding:18px}
.lp-card--lead{border-color:rgba(107,123,255,.35);background:
  radial-gradient(520px 200px at 10% 0%, rgba(107,123,255,.14), transparent 55%),
  rgba(17,22,35,.9)
}
.lp-card__badge{display:inline-block;margin:0 0 10px;padding:6px 10px;border-radius:999px;font-size:11px;font-weight:800;letter-spacing:.06em;text-transform:uppercase;color:#0c0f14;background:linear-gradient(135deg,var(--accent2),#e8b86a)}
.lp-card__title{margin:0 0 6px;font-size:18px;line-height:1.25}
.lp-card__subtitle{margin:0 0 14px;color:var(--muted);font-size:13px}
.lp-form{display:flex;flex-direction:column;gap:12px}
.lp-field span{display:block;font-size:12px;color:var(--muted);margin-bottom:6px}
.lp-field input,.lp-field textarea{
  width:100%;border-radius:12px;border:1px solid rgba(255,255,255,.12);
  background:rgba(255,255,255,.04);color:var(--text);padding:12px 12px;font-size:14px;font-family:inherit
}
.lp-field input:focus,.lp-field textarea:focus{outline:none;border-color:rgba(107,123,255,.75);box-shadow:0 0 0 2px rgba(107,123,255,.22)}
.lp-choice{margin:0;border:1px solid rgba(255,255,255,.12);border-radius:14px;padding:12px;background:rgba(255,255,255,.03)}
.lp-choice__legend{padding:0 6px;color:var(--muted);font-size:12px}
.lp-choice__opt{display:inline-flex;align-items:center;gap:8px;margin:10px 12px 0 0;color:#cfd6ea;font-size:14px;cursor:pointer;user-select:none}
.lp-choice__opt input{accent-color:var(--accent)}
.lp-consent{display:flex;gap:8px;align-items:flex-start;color:var(--muted);font-size:12.5px}
.lp-consent input{margin-top:3px}
.lp-consent a{color:#cfd6ea}
.lp-consent a:hover{text-decoration:underline}
.lp-status{min-height:18px;font-size:13px;color:var(--muted)}
.lp-mini{margin:0;color:var(--muted);font-size:12px}

.lp-section{padding:52px 0}
.lp-section--alt{background:linear-gradient(180deg, rgba(255,255,255,.03), transparent)}
.lp-section--accent{
  background:
    radial-gradient(800px 320px at 15% 20%, rgba(242,201,139,.08), transparent 55%),
    linear-gradient(180deg, rgba(107,123,255,.06), transparent)
}
.lp-section--final{
  padding-bottom:88px;
  background:
    radial-gradient(700px 280px at 50% 0%, rgba(107,123,255,.12), transparent 60%),
    linear-gradient(180deg, transparent, rgba(255,255,255,.02))
}
.lp-section__head{margin-bottom:18px}
.lp-h2{margin:0 0 6px;font-size:28px}
.lp-sub{margin:0;color:var(--muted)}

.lp-value-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px;margin-bottom:22px}
.lp-value-card{border:1px solid var(--border);border-radius:16px;padding:16px;background:rgba(255,255,255,.03)}
.lp-value-card__title{margin:0 0 8px;font-size:16px}
.lp-value-card__text{margin:0;color:#cfd6ea;font-size:14px;line-height:1.5}

.lp-cta-strip{
  display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
  margin-top:8px;padding:16px 18px;border-radius:16px;border:1px solid var(--border);
  background:rgba(255,255,255,.04)
}
.lp-cta-strip--tight{margin-top:20px}
.lp-cta-strip__text{margin:0;color:#cfd6ea;font-size:14px;max-width:720px;line-height:1.5}

.lp-why-list{margin:0;padding-left:20px;color:#cfd6ea;font-size:15px;line-height:1.55}
.lp-why-list li{margin:10px 0}
.lp-why-list strong{color:var(--text)}

.lp-gallery{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px}
.lp-gallery--6{grid-template-columns:repeat(3,minmax(0,1fr))}
.lp-gallery-note{margin:16px 0 0;text-align:center;color:var(--muted);font-size:14px}
.lp-gallery-note a{color:#cfd6ea;text-decoration:underline}
.lp-gallery-note a:hover{color:var(--text)}
.lp-shot{position:relative;border-radius:16px;overflow:hidden;border:1px solid var(--border);box-shadow:0 10px 28px rgba(0,0,0,.35);text-decoration:none}
.lp-shot img{display:block;width:100%;height:260px;object-fit:cover;transform:scale(1.01)}
.lp-shot__cap{position:absolute;left:0;right:0;bottom:0;padding:14px;background:linear-gradient(0deg, rgba(12,15,20,.92), transparent)}
.lp-shot__cap strong{display:block}
.lp-shot__cap span{display:block;color:#cfd6ea;font-size:13px;margin-top:2px}
.lp-shot:hover img{transform:scale(1.04);transition:transform .25s ease}

.lp-steps{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:14px}
.lp-step{border:1px solid var(--border);border-radius:16px;padding:14px;background:rgba(255,255,255,.03)}
.lp-step__n{font-weight:900;color:rgba(107,123,255,.95);letter-spacing:.08em}
.lp-step h3{margin:8px 0 6px}
.lp-step p{margin:0;color:#cfd6ea;font-size:13.5px}

.lp-trust-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px}
.lp-trust-card{border:1px solid var(--border);border-radius:16px;padding:16px;background:rgba(255,255,255,.03)}
.lp-trust-card__q{margin:0 0 10px;font-size:15px;line-height:1.35;color:var(--text)}
.lp-trust-card__a{margin:0;color:#cfd6ea;font-size:13.5px;line-height:1.55}

.lp-faq{display:flex;flex-direction:column;gap:10px;max-width:800px}
.lp-faq__item{border:1px solid var(--border);border-radius:14px;background:rgba(255,255,255,.03);overflow:hidden}
.lp-faq__q{padding:14px 16px;cursor:pointer;font-weight:700;font-size:15px;list-style:none}
.lp-faq__item[open] .lp-faq__q{border-bottom:1px solid var(--border)}
.lp-faq__q::-webkit-details-marker{display:none}
.lp-faq__a{margin:0;padding:0 16px 14px;color:#cfd6ea;font-size:14px;line-height:1.55}

.lp-final{border:1px solid var(--border);border-radius:20px;padding:22px 20px;background:
  radial-gradient(640px 220px at 20% 30%, rgba(107,123,255,.18), transparent 55%),
  rgba(255,255,255,.03)
}
.lp-final__title{margin-bottom:8px}
.lp-final__lead{max-width:640px;margin-bottom:16px}
.lp-final__actions{display:flex;flex-wrap:wrap;gap:10px;align-items:center}

.lp-cta-link{
  display:inline-flex;align-items:center;
  padding:12px 10px;
  border-radius:12px;
  border:1px solid rgba(255,255,255,.10);
  background:rgba(255,255,255,.02);
  text-decoration:none;
}
.lp-cta-link:hover{background:rgba(255,255,255,.04);text-decoration:none}

/* Фиксированная панель: без translate при скрытии — меньше «скачков» на iOS/Android при скролле и смене высоты viewport */
.lp-float{
  display:none;position:fixed;left:0;right:0;bottom:0;z-index:40;
  padding:12px 16px calc(12px + env(safe-area-inset-bottom, 0px));
  background:linear-gradient(180deg, transparent, rgba(12,15,20,.94) 30%);
  border-top:1px solid var(--border);
  backdrop-filter:blur(10px);
  -webkit-backface-visibility:hidden;
  backface-visibility:hidden;
  opacity:1;
  transition:opacity .2s ease;
  /* Отдельный слой — стабильнее отрисовка fixed при скролле */
  transform:translateZ(0);
}
.lp-float__btn{box-shadow:0 -4px 24px rgba(0,0,0,.35)}
.lp-float--hide{pointer-events:none;opacity:0}

.lp-footer{border-top:1px solid var(--border);padding:18px 0;color:var(--muted)}
.lp-footer__inner{display:flex;align-items:center;justify-content:space-between;gap:10px;flex-wrap:wrap}
.lp-footer__links{display:flex;gap:12px}
.lp-footer__links a{color:var(--muted);text-decoration:none}
.lp-footer__links a:hover{text-decoration:underline}

@media (max-width: 980px){
  .lp-hero__grid{grid-template-columns:1fr;gap:16px;padding:40px 0}
  .lp-h1{font-size:34px}
  .lp-value-grid{grid-template-columns:1fr}
  .lp-gallery,.lp-gallery--6{grid-template-columns:1fr 1fr}
  .lp-shot img{height:220px}
  .lp-steps{grid-template-columns:1fr 1fr}
  .lp-trust-grid{grid-template-columns:1fr}
  .lp-cta-strip{flex-direction:column;align-items:flex-start}
}
@media (max-width: 760px){
  .lp-container{
    padding-left:max(28px, env(safe-area-inset-left, 0px));
    padding-right:max(28px, env(safe-area-inset-right, 0px));
  }
  .lp-float{
    display:block;
    padding-left:max(28px, env(safe-area-inset-left, 0px));
    padding-right:max(28px, env(safe-area-inset-right, 0px));
  }
  /* Постоянный отступ снизу — контент не прыгает при появлении/исчезновении панели (меняется только прозрачность) */
  main{padding-bottom:calc(76px + env(safe-area-inset-bottom, 0px))}
  .lp-section--final{padding-bottom:48px}
}
@media (max-width: 560px){
  .lp-h1{font-size:28px}
  .lp-hero__cta{flex-direction:column;align-items:stretch}
  .lp-hero__cta .lp-btn{width:100%}
  .lp-hero__cta .lp-cta-link{justify-content:center;width:100%}
  .lp-steps{grid-template-columns:1fr}
  .lp-gallery,.lp-gallery--6{grid-template-columns:1fr}
  .lp-shot img{height:240px}
  .lp-final__actions{flex-direction:column;align-items:stretch}
  .lp-final__actions .lp-btn{width:100%}
  .lp-final__actions .lp-cta-link{justify-content:center;width:100%}
}