:root{--text:#16181d;--muted:#6b7280;--accent:#2159e2;--solid:#fff;--card:#ffffff80;--hair:#141c3017;--shadow:0 10px 34px #141e371f;--shadow-sm:0 3px 14px #141e3714;--mv-bg:radial-gradient(118% 88% at 50% 32%, #fff 0%, #eff3f9 46%, #dde4ef 100%)}@media (prefers-color-scheme:dark){:root{--text:#eef1f5;--muted:#9aa2ad;--accent:#5b8bff;--solid:#23272f;--card:#1c202875;--hair:#ffffff1f;--shadow:0 12px 36px #00000080;--shadow-sm:0 3px 14px #0006;--mv-bg:radial-gradient(118% 88% at 50% 30%, #262c36 0%, #171b21 55%, #0e1116 100%)}}*{box-sizing:border-box;-webkit-tap-highlight-color:transparent}html,body{height:100%;color:var(--text);background:var(--mv-bg);margin:0;font-family:Inter,-apple-system,Segoe UI,Roboto,system-ui,sans-serif;overflow:hidden}#stage{opacity:0;transition:opacity 1s,transform 1.3s cubic-bezier(.16,.8,.24,1);position:fixed;inset:0;transform:scale(1.03)}body.ready #stage{opacity:1;transform:none}model-viewer{--poster-color:transparent;background:0 0;width:100%;height:100%}.topbar{z-index:6;pointer-events:none;padding:18px 20px;padding-top:max(18px, env(safe-area-inset-top));position:fixed;top:0;left:0;right:0}.brand{letter-spacing:3.5px;opacity:.92;font-size:14px;font-weight:600}.brand b{color:var(--accent);font-weight:700}.rail{z-index:6;pointer-events:none;opacity:0;flex-direction:column;gap:12px;transition:opacity .6s .2s,transform .6s cubic-bezier(.16,.8,.24,1) .2s;display:flex;position:fixed;top:50%;right:16px;transform:translateY(-50%)translate(20px)}body.ready .rail{opacity:1;transform:translateY(-50%)translate(0)}.rail-btn{pointer-events:auto;background:var(--card);border:1px solid var(--hair);width:56px;height:56px;box-shadow:var(--shadow);color:var(--text);cursor:pointer;-webkit-backdrop-filter:blur(16px);backdrop-filter:blur(16px);border-radius:16px;place-items:center;transition:background .2s,color .2s,transform .15s,box-shadow .2s;display:none}.rail-btn:active{transform:scale(.93)}.rail-btn.active{background:var(--accent);color:#fff;border-color:var(--accent);box-shadow:0 8px 24px #2159e266}.rail-btn svg{width:auto;height:27px;display:block}.bottombar{z-index:6;left:14px;right:14px;bottom:max(18px, calc(env(safe-area-inset-bottom) + 12px));background:var(--card);border:1px solid var(--hair);box-shadow:var(--shadow);-webkit-backdrop-filter:blur(20px)saturate(160%);backdrop-filter:blur(20px)saturate(160%);opacity:0;border-radius:24px;justify-content:space-around;align-items:stretch;gap:6px;padding:8px 6px;transition:opacity .7s .25s,transform .7s cubic-bezier(.16,.8,.24,1) .25s;display:flex;position:fixed;transform:translateY(16px)}body.ready .bottombar{opacity:1;transform:translateY(0)}.bar-btn{pointer-events:auto;color:var(--text);cursor:pointer;background:0 0;border:none;border-radius:16px;flex-direction:column;flex:1;align-items:center;gap:4px;padding:9px 6px 7px;transition:transform .15s,color .15s,background .15s;display:flex}.bar-btn:active{transform:scale(.95)}.bar-btn.active{color:var(--accent);background:#2159e214}.bar-btn svg{width:auto;height:22px;display:block}.bar-btn .lbl{letter-spacing:.2px;color:var(--muted);font-size:11px;font-weight:600}.bar-btn.active .lbl{color:var(--accent)}.overlay{z-index:8;text-align:center;flex-direction:column;justify-content:center;align-items:center;gap:18px;padding:24px;display:flex;position:fixed;inset:0}.overlay.hidden{display:none}.drop{border:1.5px dashed var(--hair);background:var(--card);max-width:420px;box-shadow:var(--shadow);-webkit-backdrop-filter:blur(14px);backdrop-filter:blur(14px);border-radius:22px;padding:44px 36px;transition:border-color .15s,transform .15s}.drop.hot{border-color:var(--accent);transform:scale(1.01)}.drop h1{letter-spacing:.2px;margin:6px 0 8px;font-size:21px}.drop p{color:var(--muted);margin:0 0 20px;font-size:14px;line-height:1.55}.drop code{background:var(--hair);border-radius:6px;padding:1px 6px;font-size:13px}.file-btn{background:var(--accent);color:#fff;cursor:pointer;border:none;border-radius:12px;padding:12px 24px;font-size:14px;font-weight:600}.cube{opacity:.92;margin-bottom:6px;font-size:42px}.err{color:#e5484d;font-size:14px}.loader{z-index:7;pointer-events:none;place-items:center;display:none;position:fixed;inset:0}body.loading .loader{display:grid}body.ready .loader{display:none}.spinner{border:3px solid var(--hair);border-top-color:var(--accent);border-radius:50%;width:40px;height:40px;animation:.8s linear infinite spin}@keyframes spin{to{transform:rotate(360deg)}}.mv-hidden{display:none!important}.arhint{z-index:9;-webkit-backdrop-filter:blur(5px);backdrop-filter:blur(5px);background:#0a0e1452;justify-content:center;align-items:center;padding:24px;display:none;position:fixed;inset:0}.arhint.show{display:flex}.arhint .card{background:var(--solid);border:1px solid var(--hair);width:100%;max-width:360px;box-shadow:var(--shadow);text-align:center;border-radius:24px;padding:26px 22px 18px;animation:.28s cubic-bezier(.16,.8,.24,1) pop}@keyframes pop{0%{opacity:0;transform:translateY(14px)scale(.97)}to{opacity:1;transform:none}}.arhint h3{letter-spacing:.2px;margin:0 0 4px;font-size:19px}.arhint .sub{color:var(--muted);margin:0 0 16px;font-size:13px}.arhint .row{text-align:left;align-items:center;gap:14px;padding:11px 6px;display:flex}.arhint .row+.row{border-top:1px solid var(--hair)}.arhint .emo{text-align:center;flex:none;width:38px;font-size:25px}.arhint .row b{font-size:14.5px;display:block}.arhint .row small{color:var(--muted);font-size:12.5px}.arhint .start{background:var(--accent);color:#fff;cursor:pointer;letter-spacing:.2px;border:none;border-radius:14px;width:100%;margin-top:18px;padding:14px;font-size:15px;font-weight:700}.arhint .start:active{transform:scale(.98)}.arhint .cancel{width:100%;color:var(--muted);cursor:pointer;background:0 0;border:none;margin-top:6px;padding:8px;font-size:13px}