/* ═══════════════════════════════════════════════════════════════
   VOLTA — light studio product site
   Palette and furniture follow the reference: a pale cool-grey ground,
   floating white cards with generous radii, near-black type, one red.
   ═══════════════════════════════════════════════════════════════ */

:root{
  --bg:#E4E4E6; --card:#FFFFFF; --ink:#0C0C0D; --ink-2:#6B6B70; --ink-3:#A0A0A6;
  --red:#E23A2E; --line:rgba(12,12,13,.10); --shadow:0 30px 60px -28px rgba(12,12,13,.30);
  --r:28px; --r-sm:16px; --r-pill:999px;
  --ff:'Inter',-apple-system,BlinkMacSystemFont,'Helvetica Neue',Arial,sans-serif;
  --ease:cubic-bezier(.22,.61,.24,1);
  --pad:clamp(16px,3vw,34px);
}
:root[data-mode="dark"]{
  --bg:#111113; --card:#1B1B1E; --ink:#F4F4F5; --ink-2:#A2A2A9; --ink-3:#6A6A72;
  --line:rgba(255,255,255,.12); --shadow:0 30px 60px -28px rgba(0,0,0,.7);
}

*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0; background:var(--bg); color:var(--ink); font-family:var(--ff);
  -webkit-font-smoothing:antialiased; overflow-x:hidden;
  transition:background .7s var(--ease), color .7s var(--ease);
}
img,video{display:block;max-width:100%}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
:focus-visible{outline:2px solid var(--red);outline-offset:3px;border-radius:6px}

/* ── preloader ───────────────────────────────────────────── */
.pre{position:fixed;inset:0;z-index:200;background:var(--bg);display:grid;place-items:center}
.pre.is-out{pointer-events:none}
.pre__inner{display:grid;justify-items:center;gap:22px}
.pre__mark{width:64px;height:64px;border-radius:18px;background:var(--red);display:grid;place-items:center;
  color:#fff;font-weight:800;font-size:28px;transform:rotate(-8deg)}
.pre__bar{width:min(240px,54vw);height:2px;background:var(--line);overflow:hidden;border-radius:2px}
.pre__bar i{display:block;height:100%;width:0;background:var(--ink)}
.pre__pct{font-size:12px;letter-spacing:.16em;color:var(--ink-2);font-variant-numeric:tabular-nums}
.pre__pct em{font-style:normal;opacity:.5}

/* ── cursor ──────────────────────────────────────────────── */
.cur,.cur-r{position:fixed;top:0;left:0;z-index:190;pointer-events:none;border-radius:999px;
  transform:translate3d(-50%,-50%,0); mix-blend-mode:difference}
.cur{width:7px;height:7px;background:#fff}
.cur-r{width:38px;height:38px;border:1px solid rgba(255,255,255,.7);display:grid;place-items:center;
  transition:width .3s var(--ease),height .3s var(--ease),background .3s var(--ease)}
.cur-r span{font-size:9px;letter-spacing:.14em;text-transform:uppercase;color:#fff;opacity:0;transition:opacity .25s}
.cur-r.is-big{width:78px;height:78px;background:rgba(255,255,255,.14)}
.cur-r.is-big span{opacity:1}
@media (hover:none),(pointer:coarse){.cur,.cur-r{display:none}}

/* ── page curtain ────────────────────────────────────────── */
.curtain{position:fixed;inset:0;z-index:180;display:grid;grid-template-columns:repeat(5,1fr);pointer-events:none}
.curtain i{background:var(--ink);transform:scaleY(0);transform-origin:bottom}

/* ── header ──────────────────────────────────────────────── */
.hdr{position:fixed;top:var(--pad);left:var(--pad);right:var(--pad);z-index:120;
  display:flex;align-items:center;gap:14px}
.ico{width:44px;height:44px;border-radius:var(--r-pill);background:var(--ink);color:var(--bg);
  display:grid;place-items:center;flex:none;transition:transform .4s var(--ease)}
.ico svg{width:19px;height:19px}
.ico:hover{transform:scale(1.08)}
.nav{display:flex;gap:26px;font-size:13.5px;font-weight:500;color:var(--ink-2)}
.nav a{position:relative;padding:4px 0;transition:color .3s}
.nav a::after{content:'';position:absolute;left:0;right:100%;bottom:0;height:1px;background:currentColor;transition:right .4s var(--ease)}
.nav a:hover,.nav a.is-on{color:var(--ink)}
.nav a:hover::after,.nav a.is-on::after{right:0}
.brand{position:absolute;left:50%;transform:translateX(-50%);display:flex;align-items:center;gap:9px;
  font-size:20px;font-weight:700;letter-spacing:-.02em}
.brand__mk svg{width:30px;height:30px;display:block}
.brand__tx i{color:var(--red);font-style:normal}
.hdr__r{margin-left:auto;display:flex;align-items:center;gap:10px}
.pill{height:44px;padding:0 18px;border-radius:var(--r-pill);background:var(--card);color:var(--ink);
  display:inline-flex;align-items:center;gap:10px;font-size:13.5px;font-weight:500;
  box-shadow:var(--shadow);transition:transform .4s var(--ease)}
.pill:hover{transform:translateY(-2px)}
.pill--toggle{width:74px;justify-content:space-between;padding:0 8px}
.pill__dot{width:26px;height:26px;border-radius:999px;background:transparent;display:grid;place-items:center}
.pill__dot--on{background:var(--ink)}
.pill--cart{background:var(--ink);color:var(--bg)}
.pill__bag{width:26px;height:26px;border-radius:999px;background:var(--bg);color:var(--ink);display:grid;place-items:center}
.pill__bag svg{width:15px;height:15px}

/* ── route rail ──────────────────────────────────────────── */
.rail{position:fixed;right:var(--pad);top:50%;transform:translateY(-50%);z-index:110;
  display:grid;justify-items:center;gap:10px;font-size:10px;letter-spacing:.18em;color:var(--ink-3);
  font-variant-numeric:tabular-nums}
.rail__t{width:1px;height:96px;background:var(--line);position:relative}
.rail__t i{position:absolute;inset:0 0 auto;height:0;background:var(--ink);transition:height .6s var(--ease)}
.rail__n{color:var(--ink);font-weight:600}
@media (max-width:900px){.rail{display:none}}

/* ── page shell ──────────────────────────────────────────── */
.pg{padding:0 var(--pad) clamp(60px,10vw,140px)}
.pg[hidden]{display:none}
.phd{padding:clamp(120px,18vh,190px) 0 clamp(36px,6vw,64px)}
.kick{margin:0 0 12px;font-size:11px;letter-spacing:.2em;text-transform:uppercase;color:var(--ink-3)}
.phd__h{margin:0;font-size:clamp(38px,8.4vw,104px);line-height:.96;letter-spacing:-.045em;font-weight:700}
.h2{margin:0 0 16px;font-size:clamp(26px,3.6vw,48px);line-height:1.06;letter-spacing:-.035em;font-weight:700}
.lede{margin:0 0 22px;font-size:clamp(14.5px,1.4vw,17px);line-height:1.62;color:var(--ink-2);max-width:56ch}

/* ── hero ────────────────────────────────────────────────── */
.hero{position:relative;min-height:100svh;padding-top:clamp(120px,17vh,180px);display:grid;align-content:start}
.hero__h{margin:0;font-size:clamp(40px,9.6vw,124px);line-height:.9;letter-spacing:-.05em;font-weight:700;position:relative;z-index:3;pointer-events:none}
.hero__h .ln{display:block;overflow:hidden}
.hero__h .wd{display:inline-block;will-change:transform}
.chip{display:inline-block;width:.62em;height:.62em;border-radius:999px;vertical-align:.02em;margin-left:.12em}
.chip--a{background:linear-gradient(140deg,#F2F2F3,#CFCFD4);box-shadow:inset 0 -3px 8px rgba(0,0,0,.14)}
.chip--b{background:var(--ink);position:relative}
.chip--b::after{content:'⚡';position:absolute;inset:0;display:grid;place-items:center;font-size:.5em;color:#FFD84D}

.hero__plate{position:absolute;left:0;right:22%;top:clamp(250px,36vh,360px);height:clamp(240px,34vh,360px);
  background:rgba(12,12,13,.055);border-radius:var(--r);z-index:1}
:root[data-mode="dark"] .hero__plate{background:rgba(255,255,255,.05)}

/* The product is a keyed PNG, so it floats with no plate of its own. Anchored
   right-of-centre so the headline stays legible, and sized to clear the fold. */
.hero__stage{position:absolute;right:-2%;top:clamp(120px,17vh,190px);width:min(760px,64vw);
  z-index:2;will-change:transform}
.hero__img{width:100%;height:auto;border-radius:var(--r);
  /* The still carries a vignetted studio backdrop that cannot be keyed out (the
     bodywork is white, too close to the grey to separate). So it becomes a
     deliberate product panel instead — which is what the reference does too. */
  box-shadow:0 30px 60px -34px rgba(12,12,13,.4)}
.hero__vid{position:absolute;inset:0;width:100%;height:100%;object-fit:contain;opacity:0}
@media (max-width:1200px){.hero__stage{right:-6%;width:min(680px,70vw)}}

.card{position:absolute;z-index:4;background:var(--card);border-radius:var(--r);padding:18px 20px;
  box-shadow:var(--shadow);will-change:transform}
.card--rev{right:0;top:clamp(150px,21vh,220px);width:min(250px,60vw)}
.avs{display:flex;align-items:center;margin-bottom:10px}
.avs i,.avs b{width:32px;height:32px;border-radius:999px;border:2px solid var(--card);margin-left:-9px;display:grid;place-items:center}
.avs i:first-child{margin-left:0}
.avs i:nth-child(1){background:linear-gradient(135deg,#C9A227,#8a6f18)}
.avs i:nth-child(2){background:linear-gradient(135deg,#5A6C87,#2f3b4c)}
.avs i:nth-child(3){background:linear-gradient(135deg,#26543F,#143024)}
.avs b{background:var(--bg);color:var(--ink-2);font-size:14px;font-weight:500}
.card--rev p{margin:0;font-size:12.5px;line-height:1.45;color:var(--ink-2)}
.stars{color:#E9A93B;letter-spacing:.06em}

.card--spec{left:0;bottom:clamp(40px,7vh,86px);width:min(280px,74vw)}
.spec__n{margin:0;font-size:clamp(30px,4vw,46px);letter-spacing:-.04em;font-weight:700;line-height:1}
.spec__k{margin:2px 0 14px;font-size:12px;color:var(--ink-3)}
.spec__b{margin:0;font-size:12.5px;line-height:1.55;color:var(--ink-2)}
.spec__b a{border-bottom:1px solid currentColor}
.fab{position:absolute;right:-22px;bottom:-22px;width:56px;height:56px;border-radius:999px;background:var(--red);
  color:#fff;display:grid;place-items:center;box-shadow:0 14px 30px -10px rgba(226,58,46,.7);
  transition:transform .45s var(--ease)}
.fab svg{width:20px;height:20px}
.fab:hover{transform:scale(1.12) rotate(45deg)}

.card--alt{right:0;bottom:clamp(40px,7vh,86px);width:min(210px,56vw);display:flex;align-items:center;gap:12px;
  padding:12px;text-align:left}
.card--alt img{width:64px;height:48px;object-fit:contain;border-radius:12px}
.card--alt b{display:block;font-size:13px}
.card--alt i{display:block;font-style:normal;font-size:11px;color:var(--ink-3);margin-top:2px}

.hero__scroll{position:absolute;left:50%;transform:translateX(-50%);bottom:18px;z-index:5;
  display:flex;align-items:center;gap:9px;font-size:10.5px;letter-spacing:.2em;text-transform:uppercase;color:var(--ink-3)}
.hero__scroll span{width:22px;height:1px;background:currentColor;display:block}

/* ── marquee ─────────────────────────────────────────────── */
.marq{overflow:hidden;border-block:1px solid var(--line);padding:16px 0;margin-top:clamp(40px,8vw,90px)}
.marq__t{display:flex;gap:44px;white-space:nowrap;font-size:clamp(20px,2.6vw,34px);font-weight:600;
  letter-spacing:-.03em;color:var(--ink-3);will-change:transform}

/* ── bands ───────────────────────────────────────────────── */
.band{padding:clamp(56px,9vw,120px) 0}
.band--stats{display:grid;gap:clamp(20px,3vw,40px);grid-template-columns:repeat(auto-fit,minmax(min(100%,210px),1fr))}
.stat__v{font-size:clamp(40px,6vw,78px);font-weight:700;letter-spacing:-.05em;line-height:1;font-variant-numeric:tabular-nums}
.stat__u{font-size:clamp(15px,1.6vw,20px);color:var(--ink-3);margin-left:4px}
.stat p{margin:12px 0 0;font-size:13.5px;line-height:1.55;color:var(--ink-2);max-width:30ch}

.band--split{display:grid;gap:clamp(26px,5vw,64px);grid-template-columns:repeat(auto-fit,minmax(min(100%,320px),1fr));align-items:center}
.split__m{margin:0;border-radius:var(--r);overflow:hidden;background:var(--card);box-shadow:var(--shadow)}
.split__m img{width:100%;aspect-ratio:1/1;object-fit:cover;will-change:transform}
.btn{display:inline-flex;align-items:center;height:48px;padding:0 24px;border-radius:var(--r-pill);
  background:var(--ink);color:var(--bg);font-size:13.5px;font-weight:500;transition:transform .4s var(--ease)}
.btn:hover{transform:translateY(-2px)}
.btn--sub{background:var(--red);color:#fff;border:0}

/* ── models ──────────────────────────────────────────────── */
.models{display:grid;gap:clamp(18px,2.6vw,30px);grid-template-columns:repeat(auto-fit,minmax(min(100%,360px),1fr))}
.mdl{background:var(--card);border-radius:var(--r);overflow:hidden;box-shadow:var(--shadow);will-change:transform}
.mdl__m{background:var(--bg);overflow:hidden}
.mdl__m img{width:100%;aspect-ratio:4/3;object-fit:contain;padding:8% 6%;transition:transform 1s var(--ease)}
.mdl:hover .mdl__m img{transform:scale(1.06)}
.mdl__b{padding:clamp(20px,2.6vw,32px)}
.mdl__b h2{margin:0 0 10px;font-size:clamp(22px,2.6vw,32px);letter-spacing:-.035em;font-weight:700}
.mdl__b h2 em{font-style:normal;color:var(--ink-3)}
.mdl__b p{margin:0 0 18px;font-size:13.5px;line-height:1.6;color:var(--ink-2)}
.mdl dl{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin:0 0 18px;padding-top:16px;border-top:1px solid var(--line)}
.mdl dt{font-size:11px;color:var(--ink-3);margin-bottom:4px}
.mdl dd{margin:0;font-size:14px;font-weight:600}
.price{margin:0;font-size:clamp(20px,2.2vw,26px);font-weight:700;letter-spacing:-.03em}

.band--swatch{display:grid;gap:clamp(26px,5vw,64px);grid-template-columns:repeat(auto-fit,minmax(min(100%,300px),1fr));align-items:center}
.sw__row{display:flex;gap:10px;flex-wrap:wrap}
.sw{width:38px;height:38px;border-radius:999px;border:2px solid transparent;box-shadow:inset 0 0 0 1px var(--line);
  transition:transform .35s var(--ease),border-color .35s}
.sw:hover{transform:scale(1.14)}
.sw.is-on{border-color:var(--ink);transform:scale(1.14)}
.sw__m{position:relative;margin:0;border-radius:var(--r);overflow:hidden;background:var(--card);box-shadow:var(--shadow)}
.sw__m img{width:100%;aspect-ratio:4/3;object-fit:contain;padding:8% 6%}
.sw__ring{position:absolute;inset:0;border-radius:var(--r);pointer-events:none;mix-blend-mode:multiply;
  background:radial-gradient(120% 90% at 50% 60%,transparent 46%,var(--sw,transparent) 120%);opacity:.85;transition:background .6s}

/* ── technology ──────────────────────────────────────────── */
.turn{height:340vh;position:relative}
.turn__stick{position:sticky;top:0;height:100svh;display:grid;place-items:center}
.turn__v,.turn__p{width:min(920px,88vw);border-radius:var(--r);mix-blend-mode:multiply}
:root[data-mode="dark"] .turn__v,:root[data-mode="dark"] .turn__p{mix-blend-mode:screen}
.turn__p{position:absolute}
.turn__v{position:relative;z-index:1}
.turn__hud{position:absolute;top:clamp(90px,13vh,130px);left:0;display:flex;align-items:center;gap:12px;
  font-size:11px;letter-spacing:.18em;color:var(--ink-3);font-variant-numeric:tabular-nums}
.turn__hud i{width:44px;height:1px;background:var(--line)}
.turn__notes{list-style:none;margin:0;padding:0;position:absolute;right:0;bottom:clamp(60px,10vh,110px);width:min(260px,64vw)}
.turn__notes li{position:absolute;right:0;bottom:0;opacity:0;transform:translateY(14px);
  background:var(--card);border-radius:var(--r-sm);padding:14px 16px;box-shadow:var(--shadow)}
.turn__notes b{display:block;font-size:13.5px;margin-bottom:4px}
.turn__notes span{font-size:12px;line-height:1.5;color:var(--ink-2)}

.expl{height:240vh;position:relative}
.expl__stick{position:sticky;top:0;height:100svh;display:grid;place-items:center;overflow:hidden}
.expl__stick img{width:min(1000px,92vw);will-change:transform}
.expl__lab{position:absolute;background:var(--card);border-radius:var(--r-pill);padding:9px 16px;
  font-size:12px;box-shadow:var(--shadow);display:flex;align-items:center;gap:9px}
.expl__lab b{color:var(--red);font-variant-numeric:tabular-nums}
.expl__lab--1{left:4%;top:26%} .expl__lab--2{right:6%;top:38%}
.expl__lab--3{left:10%;bottom:28%} .expl__lab--4{right:12%;bottom:20%}
@media (max-width:700px){.expl__lab{display:none}}

.tbl{width:100%;border-collapse:collapse;text-align:left}
.tbl caption{text-align:left;padding-bottom:18px}
.tbl th,.tbl td{padding:16px 0;border-bottom:1px solid var(--line);font-size:14px;vertical-align:top}
.tbl th{font-weight:500;color:var(--ink-3);width:34%}
.tbl td{font-weight:500}

/* ── services ────────────────────────────────────────────── */
.svcs{display:grid;gap:clamp(16px,2.4vw,26px);grid-template-columns:repeat(auto-fit,minmax(min(100%,270px),1fr))}
.svc{background:var(--card);border-radius:var(--r);padding:clamp(22px,2.8vw,34px);box-shadow:var(--shadow);will-change:transform}
.svc__n{font-size:11px;letter-spacing:.2em;color:var(--red)}
.svc h2{margin:14px 0 10px;font-size:clamp(18px,2vw,23px);letter-spacing:-.03em;font-weight:700}
.svc p{margin:0;font-size:13.5px;line-height:1.6;color:var(--ink-2)}
.steps{list-style:none;margin:0;padding:0;display:grid;gap:0;counter-reset:s}
.steps li{display:grid;grid-template-columns:minmax(120px,22%) 1fr;gap:clamp(14px,3vw,40px);
  padding:clamp(20px,2.6vw,30px) 0;border-top:1px solid var(--line);align-items:baseline}
.steps b{font-size:clamp(18px,2.2vw,26px);letter-spacing:-.03em}
.steps span{font-size:13.5px;line-height:1.6;color:var(--ink-2)}

/* ── about ───────────────────────────────────────────────── */
.ride{position:relative;margin:0;border-radius:var(--r);overflow:hidden;box-shadow:var(--shadow);background:var(--card)}
.ride__v,.ride__p{width:100%;aspect-ratio:16/9;object-fit:cover}
.ride__v{position:absolute;inset:0;height:100%;opacity:0;transition:opacity .8s var(--ease)}
.ride__v.is-on{opacity:1}
.ride figcaption{position:absolute;left:clamp(16px,2.4vw,30px);bottom:clamp(16px,2.4vw,30px);
  background:var(--card);border-radius:var(--r-pill);padding:9px 18px;font-size:12px;box-shadow:var(--shadow)}
.band--story{display:grid;gap:clamp(24px,4vw,54px);grid-template-columns:repeat(auto-fit,minmax(min(100%,240px),1fr))}

/* ── contact ─────────────────────────────────────────────── */
.ct{display:grid;gap:clamp(22px,4vw,56px);grid-template-columns:repeat(auto-fit,minmax(min(100%,300px),1fr))}
.ct__f{display:grid;gap:16px;background:var(--card);border-radius:var(--r);padding:clamp(22px,3vw,38px);box-shadow:var(--shadow)}
.ct__f label{display:grid;gap:7px;font-size:12px;color:var(--ink-3)}
.ct__f input,.ct__f select,.ct__f textarea{width:100%;padding:13px 15px;border-radius:var(--r-sm);
  border:1px solid var(--line);background:var(--bg);color:var(--ink);font:inherit;font-size:14px;resize:vertical}
.ct__f input:focus,.ct__f select:focus,.ct__f textarea:focus{outline:none;border-color:var(--ink)}
.ct__ok{margin:0;font-size:13px;color:var(--red)}
.ct__blk{padding:20px 0;border-top:1px solid var(--line)}
.ct__blk p{margin:0;font-size:14px;line-height:1.65;color:var(--ink-2)}
.ct__blk a{border-bottom:1px solid var(--line)}

.ft{margin-top:clamp(50px,9vw,120px);padding-top:26px;border-top:1px solid var(--line);
  display:flex;flex-wrap:wrap;gap:16px 30px;align-items:center;justify-content:space-between;
  font-size:12px;color:var(--ink-3)}
.ft__mk{display:flex;align-items:center;gap:9px;font-size:18px;font-weight:700;color:var(--ink);letter-spacing:-.02em}
.ft__mk svg{width:26px;height:26px}
.ft__mk i{color:var(--red);font-style:normal}
.ft__top{font-size:12px;color:var(--ink-2)}
.ft p{margin:0}

/* ── responsive ──────────────────────────────────────────── */
@media (max-width:980px){
  .nav{display:none}
  .brand{position:static;transform:none;margin-right:auto;margin-left:6px}
  .pill--contact{display:none}
}
@media (max-width:760px){
  .hero{min-height:auto;padding-bottom:40px}
  .hero__stage{position:relative;left:auto;top:auto;transform:none;width:100%;margin:26px 0}
  .hero__plate{display:none}
  .card{position:static;width:auto;margin-top:14px}
  .fab{right:16px;bottom:-18px}
  .hero__scroll{display:none}
  .turn,.expl{height:auto}
  .turn__stick,.expl__stick{position:static;height:auto;padding:40px 0}
  .turn__notes{position:static;width:auto;display:grid;gap:10px;margin-top:20px}
  .turn__notes li{position:static;opacity:1;transform:none}
  .turn__hud{position:static;margin-bottom:16px}
}

/* ── reduced motion ──────────────────────────────────────── */
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.01ms!important;transition-duration:.01ms!important}
  .turn,.expl{height:auto}
  .turn__stick,.expl__stick{position:static;height:auto}
  .turn__notes{position:static;display:grid;gap:10px}
  .turn__notes li{position:static;opacity:1;transform:none}
  .cur,.cur-r,.curtain{display:none}
}