/* ============================================================
   GrandStone — Каркас B «Галерейный / editorial»
   Layered ON TOP of landing.css. Reuses its theme tokens,
   buttons, header, stats, form, FAQ, footer, testimonials.
   ============================================================ */

/* ---------- Transparent header over the full-bleed hero ---------- */
.header{ position:fixed; left:0; right:0; top:0; transition:background .35s ease, border-color .35s ease, backdrop-filter .35s ease; }
.header.is-transparent{ background:transparent; border-bottom-color:transparent; backdrop-filter:none; }
.header.is-transparent .nav a,
.header.is-transparent .header__phone,
.header.is-transparent .header__phone small,
.header.is-transparent .logo{ color:#f4f1ec; }
.header.is-transparent .nav a{ color:rgba(244,241,236,.82); }
.header.is-transparent .burger span{ background:#f4f1ec; }

/* ============================================================
   FULL-BLEED HERO
   ============================================================ */
.hero-full{
  position:relative; min-height:100vh; min-height:100svh;
  display:flex; align-items:flex-end; overflow:hidden;
}
.hero-full__media{ position:absolute; inset:0; z-index:0; }

/* ---- image slider (crossfade) ---- */
.hero-slider{ position:absolute; inset:0; }
.hero-slide{ position:absolute; inset:0; opacity:0; transition:opacity 1.1s ease; will-change:opacity; }
.hero-slide.is-active{ opacity:1; }
.hero-slide .slot,
.hero-slide image-slot{ display:block; width:100%; height:100%; border-radius:0; }
/* (scrim handled globally on .hero-full::after so imagery stays visible) */
/* slider progress dots — bar style, bottom-centre, clearly visible */
.hero-slider__dots{ position:absolute; z-index:5; left:50%; transform:translateX(-50%);
  bottom:clamp(20px,4vh,32px); display:flex; gap:11px; }
.hero-slider__dots button{ width:40px; height:4px; padding:0; border-radius:3px; cursor:pointer;
  border:none; background:rgba(244,241,236,.34); transition:background .3s, width .3s; }
.hero-slider__dots button:hover{ background:rgba(244,241,236,.6); }
.hero-slider__dots button.active{ background:var(--accent); width:56px; }
/* prev / next arrows */
.hero-arrow{ position:absolute; top:50%; transform:translateY(-50%); z-index:5;
  width:54px; height:54px; border-radius:50%; display:flex; align-items:center; justify-content:center;
  font-family:var(--font-display); font-size:32px; line-height:1; color:#f4f1ec;
  background:rgba(7,7,9,.32); border:1px solid rgba(244,241,236,.42); cursor:pointer;
  backdrop-filter:blur(6px); -webkit-backdrop-filter:blur(6px);
  transition:background .25s, border-color .25s, color .25s; }
.hero-arrow:hover{ background:var(--accent); border-color:var(--accent); color:var(--accent-ink); }
.hero-arrow--prev{ left:clamp(14px,2.4vw,28px); }
.hero-arrow--next{ right:clamp(14px,2.4vw,28px); }
@media (max-width:700px){ .hero-arrow{ display:none; } }
.hero-full::after{
  content:""; position:absolute; inset:0; z-index:1; pointer-events:none;
  background:
    linear-gradient(to top, rgba(7,7,8,.84) 0%, rgba(7,7,8,.32) 28%, rgba(7,7,8,0) 56%),
    linear-gradient(100deg, rgba(7,7,8,.52) 0%, rgba(7,7,8,.12) 40%, rgba(7,7,8,0) 64%);
}
.hero-full__inner{
  position:relative; z-index:2; width:100%;
  max-width:1200px; margin:0 auto; padding:0 28px clamp(60px,9vh,120px);
}
.hero-full .eyebrow{ color:var(--accent); }
.hero-full h1{
  font-size:clamp(46px,7.4vw,110px); line-height:0.98; margin-top:20px;
  max-width:16ch; color:#fbf9f5; text-shadow:0 2px 40px rgba(0,0,0,.4);
}
.hero-full h1 em{
  font-style:italic;
  background:linear-gradient(120deg, color-mix(in srgb,var(--accent) 58%, #fff 42%), var(--accent) 55%, var(--accent-2));
  -webkit-background-clip:text; background-clip:text; color:transparent;
}
.hero-full__sub{
  margin-top:24px; max-width:54ch; font-size:clamp(17px,1.7vw,21px);
  color:rgba(243,240,234,.86);
}
.hero-full__cta{ display:flex; gap:14px; flex-wrap:wrap; margin-top:34px; align-items:center; }
.hero-full__cta .btn--ghost{ color:#f4f1ec; border-color:rgba(244,241,236,.4); }
.hero-full__cta .btn--ghost:hover{ border-color:var(--accent); color:var(--accent); }
.hero-full__meta{
  display:flex; align-items:center; gap:16px; margin-top:34px; flex-wrap:wrap;
  color:rgba(243,240,234,.8); font-size:14.5px;
}
.hero-full__meta .stars{ color:var(--accent); letter-spacing:2px; }
.hero-full__meta .dot{ width:4px; height:4px; border-radius:50%; background:var(--accent); opacity:.6; }
.hero-full__scroll{
  position:absolute; left:50%; bottom:22px; transform:translateX(-50%); z-index:2;
  width:26px; height:42px; border:1.5px solid rgba(244,241,236,.45); border-radius:14px;
  display:flex; justify-content:center; padding-top:8px;
}
.hero-full__scroll::before{ content:""; width:3px; height:8px; border-radius:2px; background:var(--accent); animation:scrollDot 1.8s ease-in-out infinite; }
@keyframes scrollDot{ 0%{opacity:0;transform:translateY(-4px);} 40%{opacity:1;} 80%{opacity:0;transform:translateY(10px);} 100%{opacity:0;} }
@media (prefers-reduced-motion: reduce){ .hero-full__scroll::before{ animation:none; } }

/* ============================================================
   EDITORIAL STORY ROWS  (Почему мы — текст ↔ фото)
   ============================================================ */
.story{
  display:grid; grid-template-columns:1.05fr 1fr; gap:clamp(34px,5vw,80px);
  align-items:stretch;
}
.story + .story{ margin-top:clamp(56px,8vw,120px); }
.story--rev .story__text{ order:2; }
.story__media{ position:relative; padding:10px; margin-top:calc(clamp(40px,5vw,68px) + 14px); }
.story__media .slot,
.story__media image-slot{ display:block; width:100%; height:100%; object-fit:cover; border-radius:var(--radius); box-shadow:var(--card-shadow); }
.story__media::before{
  content:""; position:absolute; inset:0; border-radius:calc(var(--radius) + 10px);
  padding:1px; pointer-events:none; z-index:2;
  background:linear-gradient(150deg, color-mix(in srgb,var(--accent) 70%, #fff 30%), transparent 42%, transparent 60%, var(--accent-2));
  -webkit-mask:linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  -webkit-mask-composite:xor; mask-composite:exclude;
}
.story__index{ font-family:var(--font-display); font-size:clamp(40px,5vw,68px); color:var(--accent); opacity:.5; line-height:1; }
.story__text h3{ font-size:clamp(28px,3.4vw,42px); margin:14px 0 16px; }
.story__text p{ color:var(--text-muted); font-size:clamp(16px,1.5vw,18.5px); max-width:46ch; }
.story__list{ display:flex; flex-direction:column; gap:12px; margin-top:24px; }
.story__list div{ display:flex; align-items:flex-start; gap:12px; font-size:15.5px; }
.story__list .ck{ flex:none; width:24px; height:24px; border-radius:50%; background:var(--accent-soft); color:var(--accent); display:flex; align-items:center; justify-content:center; font-size:13px; margin-top:1px; }

/* ============================================================
   BIG ASYMMETRIC GALLERY
   ============================================================ */
.gallery{ display:grid; grid-template-columns:1.5fr 1fr 1fr; grid-template-rows:repeat(2,minmax(0,1fr)); gap:18px; }
.gallery__item{ position:relative; overflow:hidden; border-radius:var(--radius); border:1px solid var(--line); box-shadow:var(--card-shadow); min-height:230px; }
.gallery__item--big{ grid-row:1 / span 2; grid-column:1; }
.gallery__item--w2{ grid-column:2 / span 2; }
.gallery__item .slot,
.gallery__item image-slot{ width:100%; height:100%; min-height:inherit; border-radius:0; transition:transform .7s cubic-bezier(.2,.7,.2,1); }
.gallery__item:hover .slot{ transform:scale(1.05); }
.gallery__cap{ position:absolute; left:0; right:0; bottom:0; z-index:2; padding:26px 24px 20px;
  background:linear-gradient(to top, rgba(7,7,9,.86), rgba(7,7,9,.2) 70%, transparent); pointer-events:none; }
.gallery__cap .tag{ display:inline-block; font-size:11.5px; letter-spacing:.14em; text-transform:uppercase; color:var(--accent); margin-bottom:8px; }
.gallery__cap h3{ font-size:clamp(20px,2.2vw,27px); color:#fbf9f5; }
.gallery__item--big .gallery__cap h3{ font-size:clamp(24px,2.8vw,34px); }

/* Projects — horizontal square carousel */
.pgal{ position:relative; padding-left:74px; padding-right:74px; }
.pgal__track{ display:grid; grid-auto-flow:column; grid-auto-columns:calc((100% - 36px)/3); gap:18px;
  overflow-x:auto; scroll-snap-type:x mandatory; scroll-behavior:smooth;
  scrollbar-width:none; -ms-overflow-style:none; padding-bottom:2px; }
.pgal__track::-webkit-scrollbar{ display:none; }
.pgal__card{ position:relative; margin:0; scroll-snap-align:start; aspect-ratio:1/1; overflow:hidden;
  border-radius:var(--radius); border:1px solid var(--line); box-shadow:var(--card-shadow); background:var(--surface-2); }
.pgal__card img{ width:100%; height:100%; object-fit:cover; display:block; transition:transform .7s cubic-bezier(.2,.7,.2,1); }
.pgal__card:hover img{ transform:scale(1.05); }
.pgal__card{ cursor:pointer; }
.pgal__cap{ position:absolute; left:0; right:0; bottom:0; z-index:2; padding:22px 20px 16px;
  background:linear-gradient(to top, rgba(7,7,9,.88), rgba(7,7,9,.22) 70%, transparent); }
.pgal__cap .tag{ display:inline-block; font-size:11.5px; letter-spacing:.14em; text-transform:uppercase; color:var(--accent); margin-bottom:6px; }
.pgal__cap h3{ font-size:clamp(15px,1.35vw,19px); color:#fbf9f5; line-height:1.18; }
.pgal__arrow{ position:absolute; top:50%; transform:translateY(-50%); z-index:5;
  width:56px; height:56px; border-radius:50%; border:none; cursor:pointer; display:flex; align-items:center; justify-content:center;
  background:var(--accent); color:var(--accent-ink); font-size:32px; line-height:1; font-weight:700;
  box-shadow:0 8px 22px rgba(0,0,0,.30); transition:transform .2s, filter .2s, opacity .2s; }
.pgal__arrow:hover{ filter:brightness(1.08); transform:translateY(-50%) scale(1.07); }
.pgal__arrow:disabled{ opacity:.3; cursor:default; box-shadow:none; }
.pgal__arrow--prev{ left:0; }
.pgal__arrow--next{ right:0; }
@media (max-width:760px){
  .pgal{ padding-left:56px; padding-right:56px; }
  .pgal__track{ grid-auto-columns:calc((100% - 14px)/2); gap:14px; }
  .pgal__arrow{ width:44px; height:44px; font-size:24px; }
}
@media (max-width:460px){
  /* arrows drop below the strip; cards peek so swiping is obvious */
  .pgal{ padding:0; display:flex; flex-wrap:wrap; justify-content:center; align-items:center; gap:14px; }
  .pgal__track{ flex:0 0 100%; order:-1; grid-auto-columns:84%; gap:12px;
    padding:0 16px 2px; scroll-padding-left:16px; }
  .pgal__arrow{ position:static; transform:none; width:48px; height:48px; font-size:26px; }
  .pgal__arrow:hover{ transform:scale(1.07); }
}

/* ============================================================
   MATERIALS — INTERACTIVE TABS
   ============================================================ */
.mtabs__chips{ display:flex; gap:12px; flex-wrap:wrap; justify-content:center; margin-bottom:clamp(28px,4vw,44px); }
.mchip{ font-family:'Golos Text',sans-serif; font-weight:600; font-size:14.5px; color:var(--text-muted);
  background:var(--surface); border:1px solid var(--line); border-radius:var(--radius-pill);
  padding:11px 22px; cursor:pointer; transition:.22s; }
html[data-theme="premium"] .mchip{ backdrop-filter:blur(8px) saturate(120%); -webkit-backdrop-filter:blur(8px) saturate(120%); }
.mchip:hover{ color:var(--text); border-color:var(--accent); }
.mchip.active{ background:var(--accent); color:var(--accent-ink); border-color:var(--accent); box-shadow:0 12px 30px -14px var(--accent); }
.mtabs__panel{ display:grid; grid-template-columns:1.15fr 1fr; gap:clamp(28px,4vw,56px); align-items:center; }
.mtabs__img{ aspect-ratio:16/11; border-radius:var(--radius); border:1px solid var(--line); box-shadow:var(--card-shadow);
  background-size:cover; background-position:center; position:relative; overflow:hidden; transition:background-image .4s ease; }
.mtabs__img::after{ content:""; position:absolute; inset:0; box-shadow:inset 0 0 0 1px rgba(255,255,255,.06); border-radius:inherit; }
.mtabs__body .kicker{ font-size:13px; letter-spacing:.2em; text-transform:uppercase; color:var(--accent); }
.mtabs__body h3{ font-size:clamp(28px,3.4vw,40px); margin:12px 0 16px; }
.mtabs__body p{ color:var(--text-muted); font-size:clamp(16px,1.5vw,18px); max-width:44ch; }
.mtabs__props{ display:flex; gap:10px; flex-wrap:wrap; margin-top:22px; }
.mtabs__props span{ font-size:13px; color:var(--text); border:1px solid var(--line); border-radius:var(--radius-pill); padding:7px 15px; background:var(--surface-2); }
.mtabs__fade{ animation:mfade .35s ease; }
@keyframes mfade{ from{opacity:0; transform:translateY(8px);} to{opacity:1; transform:none;} }
@media (prefers-reduced-motion: reduce){ .mtabs__fade{ animation:none; } }

/* ---- Materials catalog carousel (3x3) ---- */
#materials{ padding-top:clamp(48px,6vw,84px); padding-bottom:clamp(48px,6vw,84px); }
.matcat{ position:relative; padding-left:74px; padding-right:74px; }
.matcat__chips{ display:flex; gap:10px; flex-wrap:wrap; justify-content:center; margin-bottom:clamp(16px,2.4vw,26px); }
.matcat__side{ position:absolute; top:calc(50% + 12px); transform:translateY(-50%); z-index:5;
  width:56px; height:56px; border-radius:50%; border:none; cursor:pointer;
  display:flex; align-items:center; justify-content:center;
  background:var(--accent); color:var(--accent-ink); font-size:32px; line-height:1; font-weight:700;
  box-shadow:0 8px 22px rgba(0,0,0,.30); transition:transform .2s, filter .2s, opacity .2s; }
.matcat__side:hover{ filter:brightness(1.08); transform:translateY(-50%) scale(1.07); }
.matcat__side:disabled{ opacity:.3; cursor:default; box-shadow:none; }
.matcat__side--prev{ left:0; }
.matcat__side--next{ right:0; }
@media (max-width:760px){
  .matcat{ padding-left:56px; padding-right:56px; }
  .matcat__side{ width:44px; height:44px; font-size:24px; }
}
@media (max-width:460px){
  .matcat{ padding-left:46px; padding-right:46px; }
}
.matcat__grid{ display:grid; grid-template-columns:repeat(3,1fr); gap:14px; }
.matcard{ position:relative; display:block; width:100%; padding:0; text-align:left; cursor:pointer; font:inherit; color:inherit;
  border-radius:var(--radius); overflow:hidden; border:1px solid var(--line); background:var(--surface); transition:transform .3s ease; }
html[data-theme="premium"] .matcard{ backdrop-filter:blur(9px) saturate(120%); -webkit-backdrop-filter:blur(9px) saturate(120%); }
.matcard:hover{ transform:translateY(-5px); }
.matcard__img{ display:block; aspect-ratio:2.3/1; overflow:hidden; background:var(--surface-2); }
.matcard__img img{ width:100%; height:100%; object-fit:cover; transition:transform .6s cubic-bezier(.2,.7,.2,1); }
.matcard:hover .matcard__img img{ transform:scale(1.05); }
.matcard__badge{ position:absolute; top:9px; left:9px; font-family:'Golos Text',sans-serif; font-size:11px; font-weight:600;
  padding:3px 9px; border-radius:var(--radius-pill); background:var(--accent); color:var(--accent-ink); }
.matcard__cap{ display:block; padding:9px 14px 11px; }
.matcard__name{ display:block; font-family:var(--font-display); font-weight:var(--head-weight); font-size:16px; color:var(--text); line-height:1.12; }
.matcard__meta{ display:block; font-size:12px; color:var(--text-muted); margin-top:2px; }
.matcat__nav{ display:flex; align-items:center; justify-content:center; gap:20px; margin-top:clamp(16px,2.4vw,26px); }
.matcat__arrow{ width:44px; height:44px; border-radius:50%; border:1px solid var(--line); background:var(--surface); color:var(--text);
  font-size:21px; line-height:1; cursor:pointer; display:flex; align-items:center; justify-content:center; transition:.22s; }
html[data-theme="premium"] .matcat__arrow{ backdrop-filter:blur(8px) saturate(120%); -webkit-backdrop-filter:blur(8px) saturate(120%); }
.matcat__arrow:hover{ border-color:var(--accent); color:var(--accent); }
.matcat__arrow:disabled{ opacity:.3; cursor:default; border-color:var(--line); color:var(--text); }
.matcat__counter{ font-family:'Golos Text',sans-serif; font-size:15px; color:var(--text-muted); min-width:90px; text-align:center; }

/* lightbox */
.matlb{ position:fixed; inset:0; z-index:300; display:none; align-items:center; justify-content:center; padding:24px;
  background:rgba(6,6,8,.82); -webkit-backdrop-filter:blur(6px); backdrop-filter:blur(6px); }
.matlb.open{ display:flex; }
.matlb__box{ position:relative; max-width:720px; width:100%; background:var(--surface); border:1px solid var(--line);
  border-radius:var(--radius); overflow:hidden; box-shadow:var(--card-shadow); }
.matlb__img img{ width:100%; display:block; max-height:78vh; object-fit:contain; background:var(--surface-2); }
.matlb__cap{ padding:20px 24px 24px; }
.matlb__cap h3{ font-family:var(--font-display); font-size:26px; margin-bottom:6px; }
.matlb__cap p{ color:var(--text-muted); font-size:15px; }
.matlb__close{ position:absolute; top:18px; right:20px; z-index:2; width:44px; height:44px; border-radius:50%;
  border:1px solid var(--line); background:rgba(12,12,16,.55); color:#fff; font-size:24px; line-height:1; cursor:pointer; }
.matlb__close:hover{ border-color:var(--accent); color:var(--accent); }

@media (max-width:760px){ .matcat__grid{ grid-template-columns:1fr 1fr; } }
@media (max-width:460px){ .matcat__grid{ grid-template-columns:1fr; } }

/* ============================================================
   VERTICAL STEPS TIMELINE
   ============================================================ */
.vsteps{ max-width:780px; margin:0 auto; }
.vstep{ position:relative; display:grid; grid-template-columns:auto 1fr; gap:26px; padding-bottom:34px; }
.vstep:last-child{ padding-bottom:0; }
.vstep__n{ position:relative; z-index:1; width:58px; height:58px; flex:none; border-radius:50%;
  background:var(--surface); border:1px solid var(--accent); color:var(--accent);
  display:flex; align-items:center; justify-content:center; font-family:var(--font-display); font-size:24px; }
html[data-theme="premium"] .vstep__n{ backdrop-filter:blur(8px); -webkit-backdrop-filter:blur(8px); }
.vstep:not(:last-child)::before{ content:""; position:absolute; left:28px; top:58px; bottom:-2px; width:1px;
  background:linear-gradient(var(--accent), var(--line)); opacity:.55; }
.vstep__body{ padding-top:9px; }
.vstep__body h4{ font-size:clamp(19px,2.1vw,24px); margin-bottom:6px; }
.vstep__body p{ color:var(--text-muted); font-size:15.5px; max-width:52ch; }

/* ============================================================
   Section intro helper (left-aligned editorial heads)
   ============================================================ */
.lede{ max-width:760px; }
.lede h2{ font-size:clamp(32px,4.4vw,56px); margin-top:18px; }
.lede p{ color:var(--text-muted); font-size:clamp(16px,1.6vw,19px); margin-top:16px; max-width:56ch; }

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width:900px){
  .story{ grid-template-columns:1fr; gap:28px; }
  .story--rev .story__text{ order:0; }
  .story__media{ order:-1; margin-top:0; }
  .story__media .slot,
  .story__media image-slot{ height:auto; min-height:0; aspect-ratio:5/4; }
  .gallery{ grid-template-columns:1fr 1fr; grid-template-rows:auto; }
  .gallery__item--big{ grid-row:auto; grid-column:1 / -1; }
  .gallery__item--w2{ grid-column:auto; }
  .mtabs__panel{ grid-template-columns:1fr; }
  .mtabs__img{ aspect-ratio:16/10; }
}
@media (max-width:560px){
  .gallery{ grid-template-columns:1fr; }
  .hero-full{ align-items:flex-end; }
}