:root{--bg:#13111D;--fg:#F0ECFF;--dim:#8C95C4;--go:#FFD36B;--gr:#54DCC4;--co:#FF806A;--bl:#6EB0FF;--panel:#1E1B30;--cell:#27233E;--hole:#0C0B13;--line:#ffffff14;--bad:#FF5C6E}
*{box-sizing:border-box;margin:0;padding:0}
[hidden]{display:none!important}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{background:var(--bg);color:var(--fg);font:16px/1.6 "Noto Sans",system-ui,-apple-system,"Segoe UI","Noto Sans CJK SC","Noto Sans CJK JP","PingFang SC","Hiragino Sans",sans-serif;overflow-x:hidden}
a{color:inherit}
img{max-width:100%;height:auto;display:block}
button{font:inherit;color:inherit}

/* nav */
nav{position:fixed;z-index:20;top:0;left:0;right:0;display:flex;justify-content:space-between;align-items:center;gap:12px;padding:max(12px,env(safe-area-inset-top)) 4vw 12px;background:linear-gradient(#13111df0,#13111d00)}
.back{text-decoration:none;color:var(--dim);font-size:.85rem;white-space:nowrap}.back:hover{color:var(--fg)}
.links{display:flex;align-items:center;gap:20px}.links>a{text-decoration:none;color:var(--dim);font-size:.9rem}.links>a:hover{color:var(--go)}
select{background:#ffffff10;color:var(--fg);border:1px solid #ffffff2a;border-radius:99px;padding:6px 12px;font:inherit;font-size:.85rem;cursor:pointer}
select option{color:#13111D}

/* hero */
.hero{position:relative;min-height:100vh;min-height:100svh;display:grid;grid-template-columns:1.15fr .85fr;align-items:center;gap:4vw;padding:100px 7vw 60px;overflow:hidden;background:radial-gradient(ellipse at 25% 35%,#241f3d 0,var(--bg) 62%)}
#drift{position:absolute;inset:0;width:100%;height:100%;pointer-events:none}
.hero-in{position:relative;z-index:1}
.hero h1 img{width:min(620px,100%);filter:drop-shadow(0 0 26px #ffd36b30)}
.tag{font-size:clamp(1.5rem,3.2vw,2.4rem);font-weight:700;letter-spacing:-.01em;line-height:1.25;margin:22px 0 12px;background:linear-gradient(90deg,var(--go),var(--co) 50%,var(--bl));-webkit-background-clip:text;background-clip:text;color:transparent}
.lead{color:#cdc9e6;font-size:1.08rem;max-width:560px}
.cta{display:flex;gap:14px;align-items:center;flex-wrap:wrap;margin-top:28px}
.pill{border:1px solid #54dcc466;color:var(--gr);border-radius:99px;padding:6px 14px;font-size:.85rem}
.btn{background:var(--go);color:#2a1f05;text-decoration:none;font-weight:700;border-radius:14px;padding:12px 24px;box-shadow:0 8px 30px #ffd36b40;transition:transform .2s}.btn:hover{transform:translateY(-2px)}
.phone{border-radius:30px;border:5px solid #2a2542;overflow:hidden;background:#000;box-shadow:0 30px 80px #000c,0 0 70px #ffd36b18}
.hero-phone{position:relative;z-index:1;width:min(300px,100%);justify-self:center;transform:rotate(3deg)}

/* sezioni */
.sec{padding:13vh 7vw 6vh;max-width:1240px;margin:0 auto}
.sec h2{font-size:clamp(1.9rem,4.6vw,3.1rem);letter-spacing:-.02em;line-height:1.1}
.lead2{color:var(--dim);margin-top:10px;max-width:720px;font-size:1.05rem}

/* gioco */
.play{display:grid;grid-template-columns:1fr 280px;gap:22px;margin-top:30px;align-items:stretch}
.stage{--cs:48px;--ts:22px;position:relative;display:flex;flex-direction:column;align-items:center;gap:18px;padding:22px 16px 26px;border-radius:24px;background:radial-gradient(ellipse at 50% 30%,#241f3d 0,#15121f 80%);border:1px solid var(--line);user-select:none;-webkit-user-select:none;touch-action:none;min-height:520px}
.tip{min-height:1.4em;color:var(--go);font-size:.88rem;text-align:center}
.board{position:relative;padding:6px;border-radius:16px;background:#1a1729;box-shadow:inset 0 0 0 1px #ffffff0d}
.board .c{position:absolute;width:calc(var(--cs) - 6px);height:calc(var(--cs) - 6px);border-radius:9px;background:var(--cell)}
.board .c.hole{background:repeating-linear-gradient(45deg,#0c0b13 0 6px,#1a1729 6px 9px)}
.board .c.anc{display:grid;place-items:center}
.board .c.anc span{display:grid;place-items:center;width:62%;height:62%;border-radius:50%;border:2px solid #f0ecffcc;font-weight:800;font-size:calc(var(--cs) * .3)}
.tray{display:flex;flex-wrap:wrap;justify-content:center;align-items:center;gap:14px 16px;width:100%;min-height:calc(var(--ts) * 3 + 10px);padding:14px 8px;border-radius:18px;background:#191627}
.pc{--u:var(--cs);position:relative;width:calc(var(--w) * var(--u) - 6px);height:calc(var(--h) * var(--u) - 6px);border-radius:calc(var(--u) * .2);background:var(--col);display:grid;place-items:center;cursor:grab;touch-action:none;transition:transform .15s,box-shadow .15s;box-shadow:0 4px 0 #0005}
.pc::before{content:"";position:absolute;inset:0;border-radius:inherit;background:linear-gradient(90deg,#ffffff30 2px,transparent 2px) 0 0/var(--u) var(--u),linear-gradient(#ffffff30 2px,transparent 2px) 0 0/var(--u) var(--u);opacity:.55;pointer-events:none}
.pc b{position:relative;color:#16131f;font-weight:800;font-size:calc(min(var(--w),var(--h)) * var(--u) * .5);line-height:1}
.tray .pc{--u:var(--ts)}
.tray .pc b{font-size:max(13px,calc(min(var(--w),var(--h)) * var(--u) * .62))}
.board .pc{position:absolute;margin:0}
.pc:hover{transform:translateY(-2px)}
.pc.fold{animation:fold .28s ease}
@keyframes fold{40%{transform:scale(.82) rotate(-6deg)}100%{transform:none}}
.pc.pop{animation:pop .3s cubic-bezier(.3,1.8,.5,1)}
@keyframes pop{0%{transform:scale(.8)}100%{transform:none}}
.pc.ghost{position:fixed;z-index:50;pointer-events:none;opacity:.92;box-shadow:0 18px 40px #000a;transition:none}
.pc.ghost.bad{outline:3px solid var(--bad);outline-offset:2px}
.board .pc.ok{animation:pop .35s cubic-bezier(.3,1.8,.5,1) var(--d,0s) both}
.win{position:absolute;inset:0;display:grid;place-content:center;justify-items:center;gap:10px;text-align:center;padding:20px;border-radius:24px;background:#13111dd9;backdrop-filter:blur(3px);opacity:0;transition:opacity .35s}
.win.on{opacity:1}
.win b{font-size:clamp(2rem,5vw,3rem);color:var(--go);text-shadow:0 0 30px #ffd36b66}
.win p{color:#cdc9e6;max-width:380px}
.wbtn{display:flex;gap:10px;margin-top:6px;flex-wrap:wrap;justify-content:center}
.wbtn button,.small{background:var(--panel);border:1px solid #ffffff22;border-radius:12px;padding:9px 16px;cursor:pointer;transition:border-color .2s,transform .2s}
.wbtn button:hover,.small:hover{border-color:var(--go);transform:translateY(-1px)}
.wbtn .go{background:var(--go);color:#2a1f05;border-color:var(--go);font-weight:700}
.side{display:flex;flex-direction:column;gap:18px;align-items:center}
.hud{display:grid;grid-template-columns:repeat(3,1fr);gap:8px;width:100%}
.hud div{background:var(--panel);border:1px solid var(--line);border-radius:14px;padding:8px 6px;text-align:center}
.hud span{display:block;color:var(--dim);font-size:.75rem}.hud b{font-size:1.25rem}
.row{display:flex;gap:8px;flex-wrap:wrap;justify-content:center}
.small{font-size:.85rem;padding:7px 12px}
.levels{display:grid;grid-template-columns:repeat(4,1fr);gap:6px;width:100%}
.levels button{background:var(--panel);border:1px solid var(--line);border-radius:10px;padding:6px 0 4px;cursor:pointer;font-weight:700;font-size:.9rem;line-height:1.2}
.levels i{display:block;font-style:normal;font-size:.62rem;color:#4d4870}
.levels .done i{color:var(--gr)}
.levels .cur{border-color:var(--go);box-shadow:0 0 14px #ffd36b40}
.help{color:#6d6890;font-size:.82rem;margin-top:12px}

/* come si gioca */
.steps{list-style:none;display:grid;grid-template-columns:repeat(5,1fr);gap:16px;margin-top:34px}
.steps li{background:var(--panel);border:1px solid var(--line);border-radius:18px;padding:22px 18px;transition:transform .3s}
.steps li:hover{transform:translateY(-4px) rotate(-1deg)}
.steps li b{display:grid;place-items:center;width:34px;height:34px;border-radius:9px;background:#ffd36b22;color:var(--go);font-weight:800;margin-bottom:12px}
.steps li:nth-child(2) b{background:#6eb0ff22;color:var(--bl)}.steps li:nth-child(3) b{background:#ff806a22;color:var(--co)}.steps li:nth-child(4) b{background:#54dcc422;color:var(--gr)}
.steps h3{font-size:1.02rem;margin-bottom:6px}.steps p{color:var(--dim);font-size:.92rem}
.nums{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;margin-top:26px}
.nums div{border-top:1px solid #ffffff1a;padding-top:14px}
.nums b{display:block;font-size:clamp(2rem,4.5vw,3.2rem);line-height:1;background:linear-gradient(90deg,var(--go),var(--co));-webkit-background-clip:text;background-clip:text;color:transparent}
.nums span{color:var(--dim);font-size:.92rem}

/* colori */
.kinds{display:grid;grid-template-columns:repeat(auto-fill,minmax(180px,1fr));gap:14px;margin-top:30px}
.kind{background:var(--panel);border:1px solid var(--line);border-radius:18px;padding:18px 16px;display:flex;flex-direction:column;gap:4px}
.kind i{display:block;height:34px;border-radius:9px;background:var(--col);margin-bottom:8px;box-shadow:0 4px 0 #0005}
.kind b{font-size:1.02rem}.kind span{color:var(--dim);font-size:.88rem}.kind small{color:var(--col);font-weight:700;letter-spacing:.06em}

/* immagini */
.rail{scrollbar-color:#2a2542 transparent;scrollbar-width:thin;display:flex;gap:22px;overflow-x:auto;scroll-snap-type:x mandatory;padding:30px 4px 18px;margin-top:4px}
.rail figure{flex:0 0 min(230px,62vw);scroll-snap-align:start;border-radius:26px}
.rail figcaption{background:#100e18;color:var(--dim);font-size:.82rem;padding:10px 14px}
.sub{margin-top:44px;font-size:1.3rem}
.video{margin:24px auto 0;border-radius:30px;overflow:hidden;border:5px solid #2a2542;background:#000;width:min(300px,78vw);box-shadow:0 30px 80px #000a,0 0 70px #ffd36b18}
.video video{width:100%;display:block}

footer{display:flex;justify-content:space-between;align-items:center;gap:18px;flex-wrap:wrap;padding:26px 5vw max(26px,env(safe-area-inset-bottom));margin-top:10vh;color:var(--dim);font-size:.85rem;border-top:1px solid var(--line)}
footer .social{display:flex;gap:16px;margin-left:auto}footer .social a{display:flex;color:var(--dim);transition:color .2s}footer .social a:hover,footer .social a:focus-visible{color:var(--fg)}footer .social svg{width:20px;height:20px;fill:currentColor}

@media(max-width:900px){
  .links>a{display:none}
  .hero{grid-template-columns:1fr;padding-top:90px}
  .hero-phone{width:min(220px,60vw)}
  .play{grid-template-columns:1fr}
  .side{display:grid;grid-template-columns:1fr auto;grid-template-areas:"hud row" "lv lv";gap:12px;align-items:center}
  .hud{grid-area:hud}.row{grid-area:row}.levels{grid-area:lv;grid-template-columns:repeat(8,1fr)}
  .steps{grid-template-columns:1fr 1fr}
  .nums{grid-template-columns:1fr 1fr}
}
@media(max-width:520px){
  .steps{grid-template-columns:1fr}
  .stage{padding:16px 8px 20px;min-height:0}
  .side{grid-template-columns:1fr;grid-template-areas:"hud" "row" "lv"}
  .levels{grid-template-columns:repeat(4,1fr)}
}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}.pc,.pc.fold,.pc.pop,.board .pc.ok{animation:none;transition:none}}