/* M-Pellet Experience — sistema grafico "Luce attraverso l'acciaio" (demo fase 1) */
@font-face{font-family:"Archivo";src:url("../fonts/archivo.woff2") format("woff2");font-weight:100 900;font-stretch:62% 125%;font-display:swap}
@font-face{font-family:"JetBrains Mono";src:url("../fonts/jetbrains-mono.woff2") format("woff2");font-weight:400 700;font-display:swap}

:root{
  --void:#0c0c0d;          /* buio di scena */
  --graphite:#2e2e31;      /* grafite del logo */
  --steel:#1b1b1d;
  --steel-2:#252528;
  --line:rgba(244,244,242,.12);
  --ink:#f4f4f2;
  --muted:#a4a4a0;
  --dim:#6f6f6c;
  --yellow:#f2d20a;        /* quadrato del logo: unico colore di interfaccia */
  --yellow-ink:#141414;
  --display:"Archivo",system-ui,sans-serif;
  --mono:"JetBrains Mono",ui-monospace,monospace;
  --gutter:clamp(16px,4vw,56px);
  --ease:cubic-bezier(.2,.7,.1,1);
}
*,*::before,*::after{box-sizing:border-box}
html{background:var(--void);color-scheme:dark}
html.lenis,html.lenis body{height:auto}
.lenis.lenis-smooth{scroll-behavior:auto!important}
body{margin:0;background:var(--void);color:var(--ink);font:400 17px/1.6 var(--display);-webkit-font-smoothing:antialiased;overflow-x:hidden}
img,svg,canvas{display:block;max-width:100%}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;cursor:pointer;background:none;border:0;padding:0}
h1,h2,h3,p{margin:0}
.mono{font-family:var(--mono);letter-spacing:-.01em}
.skip{position:absolute;left:-999px;top:8px;z-index:200;background:var(--yellow);color:var(--yellow-ink);padding:8px 14px}
.skip:focus{left:8px}
:focus-visible{outline:2px solid var(--yellow);outline-offset:3px}
.sr{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}

/* ---------- tipografia ---------- */
.kicker{font:600 12px/1 var(--mono);letter-spacing:.18em;text-transform:uppercase;color:var(--muted);display:flex;align-items:center;gap:12px}
.kicker::before{content:"";width:10px;height:10px;background:var(--yellow);flex:none}
.display{font-weight:850;font-stretch:118%;letter-spacing:-.035em;line-height:.92;text-wrap:balance}
.xl{font-size:clamp(44px,7vw,124px)}
.lg{font-size:clamp(38px,5.6vw,92px)}
.md{font-size:clamp(28px,3.4vw,54px)}
.lead{font-size:clamp(17px,1.35vw,21px);color:#d6d6d2;max-width:34ch;line-height:1.5}
.note{font:500 12px/1.5 var(--mono);color:var(--dim);max-width:60ch}
.name{font-weight:900;font-stretch:125%;letter-spacing:.02em;text-transform:uppercase;line-height:.8}
.line-mask{display:block;overflow:hidden;padding-bottom:.06em}
.line-mask>span{display:block}

/* ---------- barra superiore ---------- */
.nav{position:fixed;inset:0 0 auto;z-index:50;display:flex;align-items:center;gap:28px;height:72px;padding:0 var(--gutter);transition:background .4s,backdrop-filter .4s,transform .5s var(--ease)}
.nav.is-solid{background:rgba(12,12,13,.72);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);border-bottom:1px solid var(--line)}
.nav.is-hidden{transform:translateY(-100%)}
.brand{display:flex;align-items:center;gap:12px}
.brand svg{width:34px;height:33px}
.brand b{font-weight:900;font-stretch:125%;letter-spacing:.32em;font-size:13px}
.nav__links{display:flex;gap:26px;margin-left:auto;font-size:14px;color:#cfcfcb}
.nav__links a{position:relative;padding:6px 0}
.nav__links a::after{content:"";position:absolute;left:0;right:100%;bottom:0;height:2px;background:var(--yellow);transition:right .35s var(--ease)}
.nav__links a:hover::after,.nav__links a[aria-current]::after{right:0}
.nav__b2b{font:600 12px/1 var(--mono);letter-spacing:.12em;text-transform:uppercase;border:1px solid var(--line);padding:11px 14px;transition:border-color .3s}
.nav__b2b:hover{border-color:var(--yellow)}
@media (max-width:900px){
  .nav__links,.nav__b2b{display:none} /* solo home-cinematica: le altre pagine usano il menu condiviso qui sotto */
  .nav{height:62px;gap:12px}
}

/* ---------- menu condiviso (header di tutte le pagine; markup in docs/snippet-header-footer.html) ---------- */
.nav__menu{display:flex;align-items:center;gap:26px;margin-left:auto}
.nav__list{list-style:none;margin:0;padding:0;display:flex;align-items:center;gap:26px;font-size:14px;color:#cfcfcb}
.nav__list>li{position:relative;display:flex;align-items:center;gap:4px}
.nav__link{position:relative;padding:6px 0}
.nav__link::after{content:"";position:absolute;left:0;right:100%;bottom:0;height:2px;background:var(--yellow);transition:right .35s var(--ease)}
.nav__link:hover::after,.nav__link[aria-current]::after{right:0}
.nav__sub{width:28px;height:28px;display:grid;place-items:center;color:var(--muted)}
.nav__sub svg{width:12px;height:12px;transition:transform .3s var(--ease)}
.nav__sub[aria-expanded="true"] svg{transform:rotate(180deg)}
.nav__panel{position:absolute;top:calc(100% + 18px);left:-24px;display:none;grid-template-columns:repeat(2,minmax(190px,1fr));gap:8px 36px;padding:24px 26px 20px;background:rgba(16,16,17,.97);border:1px solid var(--line);box-shadow:0 30px 60px rgba(0,0,0,.45);min-width:560px}
.nav__panel::before{content:"";position:absolute;left:0;right:0;top:-19px;height:19px} /* ponte per il passaggio del mouse */
.nav__panel.is-open{display:grid}
@media (hover:hover) and (min-width:901px){.nav__prod:hover .nav__panel{display:grid}}
.nav__group{display:grid;gap:2px;align-content:start}
.nav__group p{font:600 11px/1 var(--mono);letter-spacing:.14em;text-transform:uppercase;color:var(--muted);margin:0 0 8px}
.nav__group ul{list-style:none;margin:0;padding:0;display:grid}
.nav__group a{display:flex;justify-content:space-between;align-items:baseline;gap:14px;padding:7px 0;border-bottom:1px solid var(--line)}
.nav__group a b{font-weight:850;font-stretch:118%;letter-spacing:.04em}
.nav__group a small{font:500 11px var(--mono);color:#9a9a96;white-space:nowrap}
.nav__group a:hover b,.nav__group a[aria-current] b{color:var(--yellow)}
.nav__all{grid-column:1/-1;display:inline-flex;align-items:center;gap:10px;margin-top:10px;font-weight:700;width:max-content}
.nav__all svg{width:14px;height:14px}
.btn.nav__cta{height:44px;padding:0 18px;font-size:14px;gap:10px}
.nav__toggle{display:none;align-items:center;gap:10px;height:44px;padding:0 14px;margin-left:auto;border:1px solid var(--line);font:600 12px/1 var(--mono);letter-spacing:.12em;text-transform:uppercase}
.nav__toggle i{display:grid;gap:5px;width:18px}
.nav__toggle i::before,.nav__toggle i::after{content:"";height:2px;background:currentColor;transition:transform .3s var(--ease)}
.nav__toggle[aria-expanded="true"] i::before{transform:translateY(3.5px) rotate(45deg)}
.nav__toggle[aria-expanded="true"] i::after{transform:translateY(-3.5px) rotate(-45deg)}
.nav.is-open{z-index:80;background:var(--void);transform:none;backdrop-filter:none;-webkit-backdrop-filter:none}
html.menu-aperto,html.menu-aperto body{overflow:hidden}
@media (max-width:900px){
  .nav__toggle{display:inline-flex}
  /* pannello a tutto schermo sotto la barra (assoluto rispetto alla barra fissa) */
  .nav__menu{position:absolute;left:0;right:0;top:100%;height:calc(100vh - 62px);height:calc(100dvh - 62px);overflow-y:auto;overscroll-behavior:contain;display:none;flex-direction:column;align-items:stretch;gap:22px;margin:0;padding:22px var(--gutter) 40px;background:var(--void);border-top:1px solid var(--line)}
  .nav.is-open .nav__menu{display:flex}
  .nav__list{flex-direction:column;align-items:stretch;gap:0;font-size:20px;color:var(--ink)}
  .nav__list>li{flex-wrap:wrap;justify-content:space-between;border-bottom:1px solid var(--line)}
  .nav__link{padding:14px 0;font-weight:700}
  .nav__link::after{display:none}
  .nav__sub{width:44px;height:44px}
  .nav__panel{position:static;min-width:0;width:100%;grid-template-columns:1fr;padding:4px 0 18px;background:none;border:0;box-shadow:none}
  .nav__panel::before{display:none}
  .nav__group a{font-size:16px}
  .btn.nav__cta{height:52px;justify-content:center}
}

/* ---------- pulsanti ---------- */
.btn{white-space:nowrap;position:relative;display:inline-flex;align-items:center;gap:14px;height:56px;padding:0 26px;font-weight:700;font-size:15px;letter-spacing:.02em;overflow:hidden;isolation:isolate;transition:color .35s}
.btn svg{width:18px;height:18px;transition:transform .35s var(--ease)}
.btn:hover svg{transform:translateX(4px)}
.btn--solid{background:var(--yellow);color:var(--yellow-ink)}
.btn--solid::before{content:"";position:absolute;inset:0;background:var(--ink);transform:translateY(101%);transition:transform .45s var(--ease);z-index:-1}
.btn--solid:hover::before{transform:none}
.btn--ghost{border:1px solid rgba(244,244,242,.3)}
.btn--ghost::before{content:"";position:absolute;inset:0;background:var(--ink);transform:scaleX(0);transform-origin:left;transition:transform .45s var(--ease);z-index:-1}
.btn--ghost:hover{color:var(--void)}
.btn--ghost:hover::before{transform:none}

/* ---------- barra demo ---------- */
.demo-pill{position:fixed;left:50%;bottom:16px;transform:translateX(-50%);z-index:60;display:flex;gap:10px;align-items:center;padding:9px 14px;background:rgba(20,20,21,.86);backdrop-filter:blur(10px);border:1px solid var(--line);font:500 11px/1.3 var(--mono);color:var(--muted);letter-spacing:.04em;max-width:calc(100vw - 32px)}
.demo-pill i{width:7px;height:7px;background:var(--yellow);flex:none;animation:blink 2s infinite}
/* acquisto sospeso (FIAMMA, ETNA): pulsanti visibili ma spenti, con nota esplicita */
.btn[data-acquisto]:disabled{background:transparent;color:var(--muted);border:1px dashed rgba(244,244,242,.28);cursor:not-allowed}
.btn[data-acquisto]:disabled::before{display:none}
.btn[data-acquisto]:disabled svg{opacity:.5}
.vendita-off{margin:0;font-size:12px;line-height:1.5;color:#cfcfcb;border-left:2px solid var(--yellow);padding:2px 0 2px 10px;max-width:46ch}
.vendita-off a{color:var(--ink);text-decoration:underline;text-underline-offset:3px;white-space:nowrap;display:inline-block;padding:3px 0}
/* home, FIAMMA, ETNA: la nota sparisce appena si scorre e resta, fissa, nel footer */
.demo-pill--intro{transition:opacity .35s,visibility .35s}
/* nota discreta su rappresentazioni non fotografiche (FIAMMA 3D, fuoco di ETNA): visibile in apertura, sparisce scorrendo */
.nota-visual{position:fixed;left:var(--gutter);bottom:14px;z-index:5;margin:0;max-width:calc(100vw - 32px);font:500 10px/1.4 var(--mono);letter-spacing:.04em;color:var(--dim);transition:opacity .35s,visibility .35s}
.nota-visual.is-away{opacity:0;visibility:hidden;pointer-events:none}
@media (max-width:760px){.nota-visual{top:64px;bottom:auto;left:16px;right:16px;font-size:9.5px}} /* su mobile in basso coprirebbe i pulsanti del hero */
.demo-pill--intro.is-away{opacity:0;visibility:hidden;pointer-events:none}
.foot__demo{grid-column:1/-1;display:flex;gap:10px;align-items:baseline;margin:8px 0 0;padding-top:20px;border-top:1px solid var(--line);font-size:12px;line-height:1.5;color:#b4b4b0;letter-spacing:.03em}
.foot__demo i{width:7px;height:7px;background:var(--yellow);flex:none;transform:translateY(-1px)}
@keyframes blink{50%{opacity:.25}}
.toast{position:fixed;left:50%;top:84px;transform:translate(-50%,-20px);opacity:0;z-index:70;padding:14px 18px;background:var(--ink);color:var(--void);font-weight:600;font-size:14px;transition:.4s var(--ease);pointer-events:none;max-width:calc(100vw - 32px)}
.toast.is-on{opacity:1;transform:translate(-50%,0)}

/* ---------- canvas di scena ---------- */
.stage{position:fixed;inset:0;width:100%;height:100vh;height:100lvh;z-index:0}
.stage canvas{width:100%;height:100%}
.stage canvas.is-drag{cursor:grabbing}
.stage-fallback{position:absolute;inset:0;display:none;place-items:center;background:radial-gradient(60% 50% at 60% 55%,#2a1a10 0%,var(--void) 70%)}
.stage-fallback img{max-height:78vh;width:auto}
.no-webgl .stage-fallback{display:grid}
.vignette{position:fixed;inset:0;pointer-events:none;z-index:1;background:radial-gradient(120% 90% at 50% 50%,transparent 55%,rgba(0,0,0,.55) 100%)}
.content{position:relative;z-index:2}

/* ---------- transizione "taglio laser" ---------- */
.laser{position:relative;height:1px;overflow:visible}
.laser::before{content:"";position:absolute;left:0;right:0;top:0;height:1px;background:linear-gradient(90deg,transparent,var(--yellow) 30%,#fff 50%,var(--yellow) 70%,transparent);transform:scaleX(var(--cut,0));transform-origin:left;box-shadow:0 0 18px 2px rgba(242,210,10,.55)}

/* ---------- footer ---------- */
.foot{position:relative;z-index:2;background:#09090a;border-top:1px solid var(--line);padding:72px var(--gutter) 96px;display:grid;grid-template-columns:1.2fr 1fr 1fr;gap:40px;font-size:14px;color:var(--muted)}
.foot .brand{margin-bottom:18px}
.foot h3,.foot h4{margin:0 0 12px;font:600 11px/1 var(--mono);letter-spacing:.16em;text-transform:uppercase;color:var(--ink)}
.foot a:hover{color:var(--ink)}
.foot ul{list-style:none;margin:0;padding:0;display:grid;gap:2px}
.foot ul a{display:inline-block;padding:4px 0;min-height:24px} /* area di tocco minima 24 px */
@media (max-width:760px){.foot{grid-template-columns:1fr;padding-bottom:120px}}
/* footer condiviso del sito: marchio + 2 famiglie di prodotti + contatti */
.foot--sito{grid-template-columns:1.3fr 1fr 1fr 1fr}
.foot h2{margin:0 0 12px;font:600 11px/1 var(--mono);letter-spacing:.16em;text-transform:uppercase;color:var(--ink)}
.foot__brand p+p{margin-top:8px}
.foot ul a[aria-current]{color:var(--ink)}
@media (max-width:900px){.foot--sito{grid-template-columns:1fr 1fr}.foot--sito .foot__brand{grid-column:1/-1}}
@media (max-width:520px){.foot--sito{grid-template-columns:1fr}}

/* ---------- componenti comuni alle pagine prodotto (prima solo in fiamma.css / etna.css / home.css:
   le copie nei CSS di pagina restano e, caricate dopo, prevalgono a parità di specificità) ---------- */
.crumb{font-size:12px;color:var(--muted)}
.crumb a:hover{color:var(--ink)}
.lbl{font-size:11px;color:var(--muted);letter-spacing:.06em;text-transform:uppercase}
.price{display:grid;gap:2px}
.price span{font-size:28px;font-weight:700}
.price small{font:500 11px var(--mono);color:var(--muted);letter-spacing:.08em;text-transform:uppercase}
.link-arrow{display:inline-flex;align-items:center;gap:10px;font-weight:700;font-size:15px;border-bottom:1px solid var(--yellow);padding-bottom:6px;width:max-content;max-width:100%}
.link-arrow svg{width:16px;height:16px;flex:none;transition:transform .35s var(--ease)}
.link-arrow:hover svg{transform:translateX(5px)}
.facts{list-style:none;margin:0;padding:0;display:grid;grid-template-columns:repeat(3,minmax(0,1fr));border-top:1px solid var(--line)}
.facts li{padding:14px 12px 0 0;display:grid;gap:4px}
.facts b{font-size:clamp(20px,2vw,28px);font-weight:700}
.facts span{font-size:11px;color:var(--muted);line-height:1.3}
.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:14px 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;transition:.25s}
.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__name small{display:block;font-weight:400;color:var(--muted);font-size:12px}
.opts__price{font-size:14px;color:var(--muted)}
.total{display:flex;flex-wrap:wrap;justify-content:space-between;align-items:baseline;gap:4px 16px}
.total b{font-size:clamp(24px,7.4vw,30px);white-space:nowrap}
/* barra mobile "richiesta rapida" */
.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(12,12,13,.92);backdrop-filter:blur(12px);-webkit-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;min-width:0}
.buybar b{font-size:20px}
.buybar span{font-size:10px;color:var(--muted)}
.buybar .btn{height:48px;padding:0 18px}
@media (max-width:760px){.buybar{display:flex}}
/* nota commerciale sotto i pulsanti di richiesta (sostituisce le note "acquisto in attivazione") */
.nota-richiesta{margin:0;font:500 12px/1.5 var(--mono);color:#cfcfcb;max-width:46ch}
.nota-richiesta a{color:var(--ink);text-decoration:underline;text-underline-offset:3px;white-space:nowrap;display:inline-block;padding:3px 0}
.nota-qty{margin:0;font:600 12px/1.5 var(--mono);color:var(--yellow);max-width:46ch}

@media (max-width:760px){.demo-pill{top:68px;bottom:auto;font-size:10px;padding:7px 10px;white-space:normal;display:block;width:calc(100vw - 32px);text-align:center} /* va a capo: troncata con l'ellissi la nota sui prezzi da confermare non si leggeva */.demo-pill i{display:inline-block;margin-right:6px;vertical-align:middle}}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.01ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important}
}