/* ETNA — "La piastra da 10 mm": asse verticale, inox e brace */
.etna{--ink-warm:#100e0d;--inox:#c9ccd1;--inox-dim:#8e9297;--ember:#ff7a1a;background:var(--ink-warm)}
.etna .foot{background:#0b0a09}

/* ---------- DISCESA (hero + camera virtuale) ---------- */
.descent{position:relative;height:560vh}
.descent__stage{position:sticky;top:0;height:100vh;height:100svh;overflow:hidden;background:radial-gradient(120% 80% at 50% 110%,#2a160c 0%,#140f0c 42%,var(--ink-warm) 70%)}
.descent__haze{position:absolute;inset:0;background:radial-gradient(40% 30% at 50% 36%,rgba(255,122,26,.18),transparent 70%);opacity:.4;pointer-events:none}
.descent__ghost{position:absolute;left:50%;top:44%;transform:translate(-50%,-50%);font-size:clamp(140px,34vw,560px);color:transparent;-webkit-text-stroke:1px rgba(201,204,209,.16);white-space:nowrap;pointer-events:none;letter-spacing:.04em}
.cam{position:absolute;left:0;top:0;transform-origin:0 0;will-change:transform}
.cam__img{display:block;width:100%;height:100%;filter:drop-shadow(0 50px 60px rgba(0,0,0,.65))}
.cam__heat{position:absolute;left:14%;top:4%;width:52%;height:22%;background:radial-gradient(50% 45% at 55% 52%,rgba(255,138,42,.55),rgba(255,122,26,.12) 55%,transparent 75%);mix-blend-mode:screen;opacity:0;pointer-events:none}
.cam__fire{position:absolute;left:23%;top:-1%;width:33%;height:19%;pointer-events:none;mix-blend-mode:screen;opacity:.85}
.descent__embers{position:absolute;inset:0;width:100%;height:100%;pointer-events:none}
.descent__floor{position:absolute;left:50%;bottom:4%;width:60vw;height:12vh;transform:translateX(-50%);background:radial-gradient(closest-side,rgba(255,122,26,.22),transparent);filter:blur(18px);pointer-events:none}

.alti{position:absolute;right:var(--gutter);top:50%;transform:translateY(-50%);display:grid;justify-items:center;gap:10px;z-index:3}
.alti__label,.alti__unit{font-size:11px;color:var(--inox-dim);letter-spacing:.2em}
.alti__track{position:relative;width:2px;height:46vh;background:repeating-linear-gradient(to bottom,rgba(201,204,209,.35) 0 1px,transparent 1px 10%)}
.alti__fill{position:absolute;left:0;right:0;top:0;height:0;background:var(--yellow)}
.alti__mark{position:absolute;left:50%;top:0;width:10px;height:10px;transform:translate(-50%,-50%) rotate(45deg);background:var(--yellow);box-shadow:0 0 12px rgba(242,210,10,.7)}
.alti__end{position:absolute;right:14px;font-size:11px;color:var(--inox-dim);transform:translateY(-50%)}
.alti__end--top{top:0}.alti__end--bot{top:100%}

.ch{position:absolute;left:var(--gutter);bottom:clamp(80px,12vh,130px);max-width:min(440px,40vw);display:grid;gap:12px;z-index:3;opacity:0;visibility:hidden}
.ch--hero{opacity:1;visibility:visible;max-width:min(520px,44vw);gap:18px}
.ch__title{font-size:clamp(72px,9vw,150px);line-height:.8}
.ch__lead{font-size:clamp(17px,1.4vw,21px);color:#e2ded8;max-width:30ch}
.ch__lead b{color:var(--inox);font-family:var(--mono)}
.ch__buy{display:flex;flex-wrap:wrap;align-items:center;gap:16px 22px}
.ch__n{font-size:12px;letter-spacing:.14em;text-transform:uppercase;color:var(--yellow)}
.ch p{color:#d8d4ce}
.ch__scroll{display:flex;align-items:center;gap:12px;font-size:11px;letter-spacing:.2em;text-transform:uppercase;color:var(--inox-dim)}
.ch__scroll span{width:1px;height:34px;background:linear-gradient(var(--yellow),transparent);animation:etna-drip 1.8s var(--ease) infinite}
@keyframes etna-drip{0%{transform:scaleY(0);transform-origin:top}50%{transform:scaleY(1);transform-origin:top}51%{transform-origin:bottom}100%{transform:scaleY(0);transform-origin:bottom}}
.price{display:grid;gap:2px}
.price span{font-size:26px;font-weight:700}
.price small{font-size:11px;color:var(--muted);letter-spacing:.06em;text-transform:uppercase}
.descent__dots{position:absolute;left:var(--gutter);bottom:40px;list-style:none;margin:0;padding:0;display:flex;gap:6px;z-index:3}
.descent__dots li{width:24px;height:2px;background:rgba(201,204,209,.2);transition:background .3s}
.descent__dots li.is-on{background:var(--yellow)}
@media (max-width:760px){
  .ch,.ch--hero{left:16px;right:16px;max-width:none;bottom:70px}
  .ch__title{font-size:clamp(64px,19vw,110px)}
  .ch__buy{flex-direction:column;align-items:stretch;gap:12px}
  .ch__buy .btn{justify-content:center}
  .ch--hero{gap:12px}
  .ch__lead{font-size:16px}
  .descent__stage::after{content:"";position:absolute;left:0;right:0;bottom:0;height:62%;background:linear-gradient(0deg,rgba(16,14,13,.96) 35%,rgba(16,14,13,.6) 70%,transparent);z-index:2;pointer-events:none}
  .alti{right:10px;top:108px;transform:none} /* sotto la nota "demo" di apertura */
  .alti__track{height:30vh}
  .descent__dots{bottom:28px;left:16px}
}
/* schermi bassi (es. 320 x 568): l'invito decorativo a scorrere lascia spazio alla nota sull'acquisto */
@media (max-width:760px) and (max-height:700px){.ch__scroll{display:none}}

/* ---------- 10 MM ---------- */
.gauge{position:relative;height:260vh;background:linear-gradient(var(--ink-warm),#0d0c0c)}
.gauge__stage{position:sticky;top:0;height:100vh;height:100svh;display:grid;grid-template-columns:minmax(280px,420px) 1fr;align-items:center;gap:clamp(20px,5vw,80px);padding:0 var(--gutter)}
.gauge__txt{display:grid;gap:18px}
.gauge__num{display:flex;align-items:baseline;gap:10px;margin:0;line-height:.85}
.gauge__num .mono{font-size:clamp(110px,15vw,250px);font-weight:700;color:var(--inox);letter-spacing:-.06em}
.gauge__num small{font:600 clamp(22px,2.4vw,36px) var(--mono);color:var(--yellow)}
.gauge .lead{max-width:34ch}
.is-hidden{display:none}
.gauge__svg{width:100%;max-height:78vh}
.svg-dim{font:700 26px var(--mono);fill:var(--yellow)}
.svg-dim--sm{font-size:20px}
.svg-note{font:500 15px var(--mono);fill:var(--dim)}
@media (max-width:760px){
  .gauge__stage{grid-template-columns:1fr;align-content:center;gap:10px;padding-top:70px}
  .gauge__svg{max-height:44vh;order:-1}
  .gauge__num .mono{font-size:clamp(80px,26vw,130px)}
}

/* ---------- QUATTRO MODI ---------- */
.modes{position:relative;height:480vh}
.modes__stage{position:sticky;top:0;height:100vh;height:100svh;overflow:hidden;display:grid;grid-template-columns:1.25fr minmax(300px,440px)}
.modes__media{position:relative;overflow:hidden;background:#0b0a09}
.modes__photo{position:absolute;inset:-6%;width:112%;height:112%;object-fit:cover;transform-origin:50% 55%;will-change:transform}
.modes__grill{position:absolute;inset:0;display:grid;place-items:center;background:radial-gradient(60% 60% at 50% 45%,#2a1a10,#0b0a09 70%);clip-path:inset(0 0 100% 0)}
.modes__grill img{width:auto;height:128%;max-width:none;transform:translate(6%,22%);filter:drop-shadow(0 30px 40px rgba(0,0,0,.6))}
.modes__ring{position:absolute;inset:0;width:100%;height:100%;pointer-events:none}
/* limite di ingrandimento: la foto sta in una cornice che non supera i pixel disponibili (misure impostate da etna.js) */
.modes__frame{position:absolute;left:0;top:0;width:100%;height:100%;overflow:hidden}
.modes__frame .modes__photo{inset:0;width:100%;height:100%}
.modes__frame.is-framed{box-shadow:0 30px 80px rgba(0,0,0,.55)}
.modes__ring rect{fill:none;stroke:var(--yellow);stroke-width:.3;vector-effect:non-scaling-stroke;stroke-dasharray:4 3;opacity:0}
.modes__smoke{position:absolute;inset:0;width:100%;height:100%;pointer-events:none}
.modes__panel{position:relative;display:grid;align-content:center;gap:26px;padding:90px clamp(24px,3vw,48px);background:linear-gradient(90deg,#0d0c0b,#141110)}
.modes__list{list-style:none;margin:0;padding:0;display:grid;gap:22px}
.modes__list li{display:grid;grid-template-columns:36px 1fr;gap:4px 12px;opacity:.28;transition:opacity .5s}
.modes__list li.is-on{opacity:1}
.modes__list li span{grid-row:span 2;font-size:14px;color:var(--yellow);padding-top:10px}
.modes__list h3{font-size:clamp(24px,2.4vw,38px)}
.modes__list p{color:#cfcac3;font-size:15px}
.modes__cta{opacity:0;transform:translateY(12px);transition:.5s var(--ease)}
.modes__cta.is-on{opacity:1;transform:none}
.modes__dots{position:absolute;left:24px;bottom:28px;list-style:none;margin:0;padding:0;display:flex;gap:6px}
.modes__dots li{width:24px;height:2px;background:rgba(255,255,255,.3)}
.modes__dots li.is-on{background:var(--yellow)}
@media (max-width:900px){
  .modes__stage{grid-template-columns:1fr;grid-template-rows:56% 44%}
  .modes__panel{padding:18px 16px 24px;align-content:start;gap:12px}
  .modes__list{gap:0;position:relative;min-height:120px}
  .modes__list li{position:absolute;inset:0 0 auto;opacity:0;transition:opacity .4s}
  .modes__list li.is-on{opacity:1}
  .modes__list h3{font-size:26px}
}

/* ---------- ESPLORA ---------- */
.explore{padding:130px var(--gutter) 110px;background:#0d0c0c;display:grid;gap:40px}
.explore__head{display:grid;gap:14px}
.explore__grid{display:grid;grid-template-columns:1.1fr minmax(300px,440px);gap:clamp(24px,5vw,80px);align-items:center}
.explore__fig{position:relative;justify-self:center;width:min(100%,640px)}
.explore__fig img{width:100%;height:auto;filter:drop-shadow(0 40px 50px rgba(0,0,0,.6))}
.hot{position:absolute;left:var(--x);top:var(--y);width:40px;height:40px;margin:-20px 0 0 -20px;border-radius:50%;background:rgba(16,14,13,.7);border:1.5px solid var(--yellow);color:var(--yellow);display:grid;place-items:center;transition:transform .3s var(--ease),background .3s}
.hot svg{width:18px;height:18px;transition:transform .3s var(--ease)}
.hot::after{content:"";position:absolute;inset:-8px;border-radius:50%;border:1px solid rgba(242,210,10,.45);animation:etna-ping 2s var(--ease) infinite}
.hot:hover,.hot[aria-expanded="true"]{background:var(--yellow);color:var(--yellow-ink);transform:scale(1.1)}
.hot[aria-expanded="true"] svg{transform:rotate(45deg)}
@keyframes etna-ping{from{transform:scale(.6);opacity:1}to{transform:scale(1.5);opacity:0}}
.explore__panel{display:grid;gap:16px;align-content:start}
.lens{width:100%;aspect-ratio:16/10;border:1px solid var(--line);background:#0b0a09 url(../img/etna/etna-prodotto.webp) no-repeat;background-size:260%;transition:background-position .7s var(--ease),background-size .7s var(--ease)}
.explore__n{font-size:12px;color:var(--yellow);letter-spacing:.14em}
.explore__panel p{color:#d3cfc8;max-width:40ch}
.explore__nav{display:flex;gap:10px}
.explore__nav .btn{height:48px;padding:0 20px}
@media (max-width:900px){.explore__grid{grid-template-columns:1fr}.lens{aspect-ratio:16/9}}

/* ---------- SCENA ---------- */
.scene{position:relative;height:130vh;overflow:hidden;display:grid;align-items:end}
.scene__media{position:absolute;inset:0;overflow:hidden}
.scene__media img{width:100%;height:120%;object-fit:cover;object-position:50% 40%;will-change:transform}
.scene::after{content:"";position:absolute;inset:0;background:linear-gradient(0deg,rgba(16,14,13,.92) 0%,rgba(16,14,13,.35) 45%,rgba(16,14,13,.1) 70%),linear-gradient(90deg,rgba(16,14,13,.6),transparent 60%)}
/* foto in giardino a 1080 px: a tutto schermo sarebbe ingrandita fino a 4 volte, quindi sta in una cornice (lato impostato da etna.js) */
.scene--framed .scene__media{inset:auto;top:calc(50% - var(--side) / 2);right:var(--gutter);width:var(--side);height:var(--side);box-shadow:0 30px 80px rgba(0,0,0,.55)}
.scene--framed .scene__media img{height:100%}
.scene--framed.scene--stack{height:auto;min-height:100vh;align-content:center;gap:36px;padding:14vh 0 10vh}
.scene--framed.scene--stack .scene__media{position:relative;inset:auto;margin:0 auto;z-index:1}
.scene--framed.scene--stack .scene__txt{padding-bottom:0}
.scene__txt{position:relative;z-index:1;display:grid;gap:18px;padding:0 var(--gutter) 14vh;max-width:680px}

/* ---------- CONFIGURATORE ---------- */
.config-e{display:grid;grid-template-columns:1fr minmax(320px,460px);gap:clamp(24px,5vw,80px);padding:120px var(--gutter);background:linear-gradient(#100e0d,#0d0c0c);align-items:start}
.config-e__fig{position:sticky;top:90px;display:grid;gap:12px;justify-items:center}
.config-e__fig img{width:min(100%,600px);height:auto}
.config-e__panel{display:grid;gap:18px;background:rgba(22,19,17,.9);border:1px solid var(--line);padding:30px}
.row-fixed{display:flex;align-items:baseline;gap:12px;flex-wrap:wrap;border-top:1px solid var(--line);padding-top:14px}
.row-fixed span{color:var(--muted);font-size:14px}
.row-fixed small{font-size:11px;color:var(--dim)}
.seg{border:0;margin:0;padding:0;display:grid;gap:10px}
.seg legend{font-weight:600;margin-bottom:10px}
.seg{grid-template-columns:repeat(3,1fr)}
.seg legend{grid-column:1/-1}
.seg label{position:relative;cursor:pointer}
.seg input{position:absolute;opacity:0}
.seg span{display:grid;gap:2px;padding:12px 10px;border:1px solid var(--line);text-align:center;font-weight:600;font-size:14px;transition:.25s}
.seg small{font-size:11px;color:var(--muted);font-weight:500}
.seg input:checked+span{background:var(--yellow);color:var(--yellow-ink);border-color:var(--yellow)}
.seg input:checked+span small{color:var(--yellow-ink)}
.seg input:focus-visible+span{outline:2px solid var(--yellow);outline-offset:3px}
.opts{list-style:none;margin:0;padding:0;border-top:1px solid var(--line)}
.opts li{border-bottom:1px solid var(--line)}
.opts label{display:grid;grid-template-columns:22px 1fr auto;gap:14px;align-items:center;padding:13px 0;cursor:pointer}
.opts input{position:absolute;opacity:0;pointer-events:none}
.opts__box{width:22px;height:22px;border:1px solid rgba(244,244,242,.35);position:relative}
.opts__box::after{content:"";position:absolute;inset:4px;background:var(--yellow);transform:scale(0);transition:transform .3s var(--ease)}
.opts input:checked+.opts__box{border-color:var(--yellow)}
.opts input:checked+.opts__box::after{transform:scale(1)}
.opts input:focus-visible+.opts__box{outline:2px solid var(--yellow);outline-offset:3px}
.opts__name{font-weight:600}
.opts__price{font-size:14px;color:var(--muted)}
.total{display:flex;justify-content:space-between;align-items:baseline}
.lbl{font-size:11px;color:var(--muted);letter-spacing:.06em;text-transform:uppercase}
.total b{font-size:30px}
@media (max-width:900px){.config-e{grid-template-columns:1fr;padding-top:90px}.config-e__fig{position:static}.config-e__panel{padding:20px}.seg{grid-template-columns:1fr 1fr 1fr}}

/* ---------- SCHEDA ---------- */
.specs-e{padding:110px var(--gutter);background:#0d0c0c;display:grid;gap:30px}
.specs-e__grid{margin:0;display:grid;grid-template-columns:repeat(2,1fr);border-top:1px solid var(--line)}
.specs-e__grid div{display:grid;grid-template-columns:150px 1fr;gap:12px;padding:15px 0;border-bottom:1px solid var(--line);font-size:14px}
.specs-e__grid div:nth-child(odd){padding-right:28px}
.specs-e dt{color:var(--muted)}
.specs-e dd{margin:0}
.specs-e__b2b{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:16px;border:1px solid var(--line);padding:22px 24px}
@media (max-width:760px){.specs-e__grid{grid-template-columns:1fr}.specs-e__grid div{grid-template-columns:110px 1fr}}

/* ---------- barra acquisto mobile ---------- */
.buybar{position:fixed;left:0;right:0;bottom:0;z-index:55;display:none;align-items:center;justify-content:space-between;gap:12px;padding:10px 16px calc(10px + env(safe-area-inset-bottom));background:rgba(16,14,13,.94);backdrop-filter:blur(12px);border-top:1px solid var(--line);transform:translateY(100%);transition:transform .5s var(--ease)}
.buybar.is-on{transform:none}
.buybar div{display:grid}
.buybar b{font-size:20px}
.buybar span{font-size:10px;color:var(--muted)}
.buybar .btn{height:48px}
@media (max-width:760px){.buybar{display:flex}}