@font-face{font-family:"Saira";src:url(fonts/Saira-var.woff2) format("woff2");font-weight:100 900;font-stretch:75% 125%;font-display:swap}
@font-face{font-family:"IBM Plex Mono";src:url(fonts/IBMPlexMono-500.woff2) format("woff2");font-weight:500;font-display:swap}
:root{--bg:#05070a;--ink:#e9eef4;--muted:#8792a0;--line:rgba(233,238,244,.14);--acc:#29c9ff;--warm:#ff8a3d;
  --sans:"Saira",system-ui,-apple-system,"Segoe UI",sans-serif;--mono:"IBM Plex Mono",ui-monospace,monospace}
*{box-sizing:border-box;margin:0;padding:0}
html,body{background:var(--bg);color:var(--ink);overflow-x:clip}
body{font:400 16px/1.55 var(--sans);-webkit-font-smoothing:antialiased}
.top{position:fixed;inset:0 0 auto;z-index:20;display:flex;justify-content:space-between;align-items:center;gap:12px;
  padding:max(14px,env(safe-area-inset-top)) clamp(16px,4vw,40px) 14px;background:linear-gradient(var(--bg),transparent);pointer-events:none}
.top>*{pointer-events:auto}
.brand{color:var(--ink);text-decoration:none;font:500 13px/1 var(--mono);letter-spacing:.28em}
.brand b{font-weight:500;color:var(--acc)}
.tag{font:500 10.5px/1 var(--mono);letter-spacing:.14em;text-transform:uppercase;color:var(--muted);border:1px solid var(--line);padding:6px 10px;border-radius:99px}

/* apertura */
.hero{position:relative;min-height:100svh;display:grid;align-items:end;overflow:hidden}
.hero picture,.hero img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;object-position:60% 50%}
.hero::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(5,7,10,.2) 30%,rgba(5,7,10,.95) 92%),radial-gradient(120% 80% at 0% 100%,rgba(5,7,10,.9),transparent 60%)}
.hero-txt{position:relative;z-index:1;padding:0 clamp(16px,5vw,64px) clamp(84px,12vh,130px)}
.kicker{font:500 12px/1 var(--mono);letter-spacing:.22em;text-transform:uppercase;color:var(--acc);margin-bottom:14px}
h1{font-weight:800;font-size:clamp(84px,19vw,230px);line-height:.82;letter-spacing:-.05em}
.claim{font-size:clamp(20px,2.4vw,30px);font-weight:300;margin-top:14px;color:#cdd5df}
.specs{list-style:none;display:flex;flex-wrap:wrap;gap:10px 26px;margin-top:22px;font:500 12px/1.4 var(--mono);color:var(--muted);letter-spacing:.06em;text-transform:uppercase}
.specs b{display:block;font:700 26px/1.1 var(--sans);color:var(--ink);letter-spacing:-.02em;text-transform:none}
.cue{position:absolute;z-index:1;right:clamp(16px,5vw,64px);bottom:clamp(28px,5vh,48px);font:500 11px/1 var(--mono);letter-spacing:.18em;text-transform:uppercase;color:var(--muted)}
.cue span{display:inline-block;animation:bob 1.6s ease-in-out infinite;color:var(--acc)}
@keyframes bob{50%{transform:translateY(5px)}}

/* scena 3D: alta, con la parte visibile fissa */
.scena{position:relative;height:720vh}
.sticky{position:sticky;top:0;height:100vh;height:100svh;overflow:hidden;
  background:radial-gradient(70% 60% at 55% 50%,#0d1520 0%,var(--bg) 70%)}
#gl{position:absolute;inset:0;width:100%;height:100%;display:block;touch-action:pan-y}
.fallback{position:absolute;inset:0;width:100%;height:100%;object-fit:contain}
.hud i{position:absolute;width:26px;height:26px;border:1.5px solid rgba(41,201,255,.55)}
.hud i:nth-child(1){top:74px;left:18px;border-right:0;border-bottom:0}.hud i:nth-child(2){top:74px;right:18px;border-left:0;border-bottom:0}
.hud i:nth-child(3){bottom:18px;left:18px;border-right:0;border-top:0}.hud i:nth-child(4){bottom:18px;right:18px;border-left:0;border-top:0}
.hud span{position:absolute;bottom:26px;font:500 10.5px/1 var(--mono);letter-spacing:.18em;color:var(--muted)}
.hud-l{left:52px}.hud-r{right:52px;color:var(--acc)!important;font-variant-numeric:tabular-nums}
.lead{position:absolute;inset:0;width:100%;height:100%;pointer-events:none;overflow:visible}
#lead-line{stroke:var(--acc);stroke-width:1.2;stroke-dasharray:4 4;opacity:.85}
#lead-dot{fill:var(--acc)}#lead-ring{fill:none;stroke:var(--acc);stroke-width:1.2;opacity:.6;transform-box:fill-box;transform-origin:center;animation:ring 1.6s ease-out infinite}
@keyframes ring{from{transform:scale(.6);opacity:.9}to{transform:scale(1.6);opacity:0}}
.callout{position:absolute;left:clamp(16px,5vw,64px);top:50%;transform:translateY(-50%);width:min(360px,calc(100% - 32px));
  padding:20px 22px;border:1px solid var(--line);border-left:2px solid var(--acc);background:rgba(5,9,14,.72);backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px);
  border-radius:4px 14px 14px 4px;transition:opacity .35s,transform .45s cubic-bezier(.2,.9,.2,1)}
.callout.out{opacity:0;transform:translateY(calc(-50% + 14px))}
.callout .num{font:500 11px/1 var(--mono);letter-spacing:.2em;color:var(--acc);margin-bottom:10px}
.callout h2{font-weight:750;font-size:clamp(22px,2.4vw,30px);line-height:1.1;letter-spacing:-.02em}
.callout p{color:#b9c2cd;font-size:15px;margin-top:8px}
.callout .data{font:500 12px/1.5 var(--mono);color:var(--warm);letter-spacing:.04em;margin-top:12px}
.rail{position:absolute;right:clamp(16px,3vw,40px);top:50%;transform:translateY(-50%);list-style:none;display:grid;gap:12px;
  font:500 10px/1 var(--mono);letter-spacing:.14em;text-transform:uppercase;color:var(--muted);text-align:right}
.rail li{display:flex;align-items:center;justify-content:flex-end;gap:10px;opacity:.45;transition:opacity .3s,color .3s}
.rail li::after{content:"";width:16px;height:1.5px;background:currentColor;transition:width .3s}
.rail li.on{opacity:1;color:var(--acc)}.rail li.on::after{width:30px}
.drag{position:absolute;left:50%;bottom:44px;transform:translateX(-50%);font:500 10.5px/1 var(--mono);letter-spacing:.16em;color:var(--muted);text-transform:uppercase;opacity:.8}
.explore{position:absolute;right:clamp(16px,3vw,40px);top:88px;z-index:5;font:600 11px/1 var(--mono);letter-spacing:.14em;text-transform:uppercase;
  color:var(--ink);background:rgba(5,9,14,.7);border:1px solid var(--acc);border-radius:99px;padding:10px 14px;cursor:pointer;backdrop-filter:blur(8px)}
.explore[aria-pressed=true]{background:var(--acc);color:#04121a}
.exploring .callout,.exploring .lead,.exploring .rail,.exploring .drag{opacity:0!important;pointer-events:none}
.exploring #gl{cursor:grab}
@media (max-width:760px){
  .callout{top:auto;bottom:max(18px,env(safe-area-inset-bottom));transform:none;padding:12px 14px}
  .callout.out{transform:translateY(14px)}
  .callout .num{margin-bottom:6px}
  .callout h2{font-size:19px}
  .callout p{font-size:12.5px;line-height:1.45;margin-top:5px}
  .callout .data{font-size:11px;margin-top:7px}
  .hud i:nth-child(3),.hud i:nth-child(4){display:none}
  .rail{display:none}
  .drag{bottom:auto;top:140px}
  .explore{top:84px}
  .hud span{display:none}
}

/* dati */
.dati{padding:clamp(70px,12vw,140px) clamp(16px,5vw,64px);max-width:1240px;margin:0 auto}
.dati h2{font-weight:800;font-size:clamp(38px,6vw,76px);letter-spacing:-.04em;line-height:.95;margin-bottom:36px}
.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(min(100%,260px),1fr));border-top:1px solid var(--line)}
.grid div{padding:20px 4px;border-bottom:1px solid var(--line)}
.grid dt{font:500 11px/1.4 var(--mono);letter-spacing:.14em;text-transform:uppercase;color:var(--muted)}
.grid dd{font-weight:700;font-size:32px;letter-spacing:-.02em;margin-top:6px;font-variant-numeric:tabular-nums}
.grid small{font:500 12px var(--mono);color:var(--muted);letter-spacing:.04em;margin-left:4px}
.foot{padding:28px clamp(16px,5vw,64px) max(28px,env(safe-area-inset-bottom));border-top:1px solid var(--line);font:500 11px/1.6 var(--mono);color:var(--muted);letter-spacing:.06em}
.foot b{color:var(--ink);font-weight:500}
@media (prefers-reduced-motion:reduce){.cue span,#lead-ring{animation:none}}

/* ---- v2: il 3D è l'apertura della pagina ---- */
.scena{height:820vh}
.sticky{background:var(--bg)}
.intro{position:absolute;z-index:3;left:clamp(16px,5vw,72px);top:50%;transform:translateY(-50%);max-width:min(560px,46vw);pointer-events:none}
.intro .kicker{opacity:0;transform:translateY(12px);transition:opacity .8s .2s,transform .9s .2s cubic-bezier(.2,.9,.2,1)}
.intro h1{font-size:clamp(96px,15vw,230px);background:linear-gradient(180deg,#fff 30%,#8fa3b8);-webkit-background-clip:text;background-clip:text;color:transparent;
  opacity:0;transform:translateY(40px);transition:opacity 1s .35s,transform 1.2s .35s cubic-bezier(.2,.9,.2,1)}
.intro .claim{opacity:0;transform:translateY(16px);transition:opacity .9s .7s,transform 1s .7s cubic-bezier(.2,.9,.2,1)}
.intro .claim em{font-style:normal;color:var(--acc)}
.intro .specs{opacity:0;transition:opacity .9s 1s}
.intro .cue{position:static;margin-top:34px;opacity:0;transition:opacity .9s 1.4s}
.ready .intro>*{opacity:1;transform:none}
.callout{transition:opacity .45s,transform .45s cubic-bezier(.2,.9,.2,1)}
.intro-on .callout,.intro-on .lead,.intro-on .rail{opacity:0!important}
@media (max-width:760px){
  .intro{left:16px;right:16px;top:calc(env(safe-area-inset-top) + 92px);transform:none;max-width:none}
  .intro h1{font-size:clamp(84px,27vw,140px)}
  .intro .claim{font-size:19px}
  .intro .specs{gap:8px 18px}.intro .specs b{font-size:22px}
  .intro .cue{position:absolute;top:calc(100svh - 200px);margin:0}
}
.drag,.explore{transition:opacity .4s}
.intro-on .drag{opacity:0!important}
@media (max-width:760px){.intro-on .explore{opacity:0;pointer-events:none}}

/* ---- v3: riquadro informazioni ben leggibile, schede dei pezzi ---- */
.callout{background:rgba(7,11,17,.94);border:1px solid rgba(41,201,255,.35);border-left:3px solid var(--acc);
  border-radius:6px 16px 16px 6px;padding:24px 26px 22px;width:min(400px,calc(100% - 32px));
  box-shadow:0 24px 60px -20px rgba(0,0,0,.8),0 0 0 1px rgba(0,0,0,.4);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px)}
.callout .num{font-size:12px;color:var(--acc);margin-bottom:12px}
.callout h2{font-size:clamp(26px,2.6vw,34px);color:#fff}
.callout p{color:#d3dbe4;font-size:16px;line-height:1.55}
.callout .data{display:inline-block;margin-top:14px;padding:6px 10px;border-radius:6px;background:rgba(255,138,61,.12);color:#ffb37a;font-size:12.5px}
.tip{position:absolute;left:0;top:0;z-index:8;max-width:300px;padding:14px 16px;border-radius:12px;pointer-events:none;
  background:rgba(7,11,17,.96);border:1px solid rgba(41,201,255,.45);box-shadow:0 18px 40px -12px rgba(0,0,0,.8);
  opacity:0;transition:opacity .18s;will-change:transform}
.tip.on{opacity:1}
.tip b{display:block;font:700 16px/1.25 var(--sans);color:#fff}
.tip span{display:block;margin-top:6px;font-size:13.5px;line-height:1.5;color:#c9d2dc}
.tip i{display:block;margin-top:9px;font:500 11.5px/1.3 var(--mono);font-style:normal;letter-spacing:.06em;color:var(--acc)}
.drag .d-mob{display:none}
@media (hover:none){.drag .d-desk{display:none}.drag .d-mob{display:inline}}
@media (max-width:760px){
  .callout{padding:14px 16px}
  .callout h2{font-size:21px}
  .callout p{font-size:13.5px}
  .callout .data{margin-top:8px;font-size:11px}
  .tip{max-width:min(280px,calc(100vw - 32px))}
}

/* ---- v5: schermata di caricamento a tutto schermo ---- */
@property --g{syntax:"<percentage>";inherits:false;initial-value:0%}
.loading{position:fixed;inset:0;z-index:100;display:block;overflow:hidden;background:#04060a;color:var(--ink);
  font:500 12px/1 var(--mono);letter-spacing:.18em;text-transform:uppercase;text-align:center;
  -webkit-mask:linear-gradient(#000 calc(50% - var(--g)),transparent calc(50% - var(--g)) calc(50% + var(--g)),#000 calc(50% + var(--g)));
  mask:linear-gradient(#000 calc(50% - var(--g)),transparent calc(50% - var(--g)) calc(50% + var(--g)),#000 calc(50% + var(--g)));
  transition:--g 1.05s cubic-bezier(.75,0,.2,1)}
.loading.open{--g:51%}
.loading.done{display:none}
.loading::after{content:"";position:absolute;left:0;right:0;top:50%;height:2px;margin-top:-1px;background:var(--acc);box-shadow:0 0 24px 4px rgba(41,201,255,.7);
  transform:scaleX(0);opacity:0}
.loading.open::after{animation:slit .7s cubic-bezier(.2,.9,.2,1)}
@keyframes slit{0%{transform:scaleX(0);opacity:1}60%{transform:scaleX(1);opacity:1}100%{transform:scaleX(1);opacity:0}}
/* lo schermo che si riempie dal basso, con il bordo luminoso */
.ld-fill{position:absolute;inset:0;transform:translateY(100%);will-change:transform;
  background:linear-gradient(180deg,rgba(41,201,255,.26) 0,rgba(41,201,255,.09) 18%,rgba(12,38,58,.55) 60%,rgba(8,22,34,.9) 100%);
  border-top:2px solid var(--acc);box-shadow:0 -10px 50px -6px rgba(41,201,255,.55)}
.ld-alt{position:absolute;right:clamp(16px,4vw,48px);top:10px;font:500 11px/1 var(--mono);letter-spacing:.16em;color:var(--acc)}
.ld-alt b{font-weight:500}
.ld-grid{position:absolute;inset:0;pointer-events:none;opacity:.35;
  background-image:linear-gradient(rgba(233,238,244,.05) 1px,transparent 1px),linear-gradient(90deg,rgba(233,238,244,.05) 1px,transparent 1px);
  background-size:56px 56px;-webkit-mask:radial-gradient(70% 70% at 50% 50%,#000,transparent);mask:radial-gradient(70% 70% at 50% 50%,#000,transparent)}
/* il fan dietro il numero: le pale si accendono una a una */
.ld-fan{position:absolute;left:50%;top:50%;width:min(92vmin,760px);height:min(92vmin,760px);transform:translate(-50%,-50%);overflow:visible}
.ld-fan path{fill:rgba(233,238,244,.02);stroke:rgba(233,238,244,.16);stroke-width:.6;transition:fill .35s,stroke .35s}
.ld-fan path.on{fill:rgba(41,201,255,.16);stroke:rgba(41,201,255,.9)}
.ld-fan .hub{fill:#04060a;stroke:rgba(41,201,255,.6);stroke-width:.8}
.ld-fan .ring{fill:none;stroke:rgba(41,201,255,.35);stroke-width:.5;stroke-dasharray:2 3}
.ld-center{position:absolute;left:0;right:0;top:50%;transform:translateY(-50%);pointer-events:none}
.ld-cap{color:var(--muted);margin-bottom:6px}.ld-cap b{color:var(--acc);font-weight:500}
.ld-num{font:800 clamp(120px,28vw,360px)/.86 var(--sans);letter-spacing:-.06em;font-variant-numeric:tabular-nums;color:#fff;
  text-shadow:0 0 60px rgba(41,201,255,.35);text-transform:none}
.ld-num i{font-style:normal;font-size:.22em;letter-spacing:0;color:var(--acc);vertical-align:.95em;margin-left:.08em}
.ld-status{margin-top:14px;color:var(--ink);letter-spacing:.3em}
.ld-status.in{animation:word .5s cubic-bezier(.2,.9,.2,1)}
@keyframes word{from{opacity:0;transform:translateY(8px);letter-spacing:.6em}to{opacity:1;transform:none}}
.ld-corner{position:absolute;bottom:max(22px,env(safe-area-inset-bottom));font-size:10.5px;color:var(--muted)}
.ld-corner.l{left:clamp(16px,4vw,48px)}.ld-corner.r{right:clamp(16px,4vw,48px)}
.loading.open .ld-center{transition:transform .9s cubic-bezier(.7,0,.2,1),opacity .6s;transform:translateY(-50%) scale(1.25);opacity:0}
@media (max-width:760px){.ld-fan{width:118vmin;height:118vmin}.ld-status{letter-spacing:.2em}}
@media (prefers-reduced-motion:reduce){.loading{transition:none}.ld-status.in{animation:none}}

/* ---- v6: font Saira, niente cornice ai bordi ---- */
.hud{display:none}
h1,.intro h1,.ld-num,.callout h2,.dati h2{font-stretch:112%;letter-spacing:-.02em}
.intro h1{font-weight:700}
.ld-num{font-weight:700;letter-spacing:-.03em}
.callout h2,.tip b{font-weight:650}
.specs b,.grid dd{font-stretch:108%;font-weight:650}