:root{--sand:#e8b45c;--sand-d:#d59a37}.game{background:var(--card);border:1px solid var(--line);border-radius:24px;margin-top:clamp(22px,3vw,32px);padding:clamp(22px,3.4vw,40px);box-shadow:0 20px 48px #181d1a12}.screen{display:none}.screen.on{animation:.3s fade;display:block}@keyframes fade{0%{opacity:0;transform:translateY(6px)}to{opacity:1;transform:none}}.start{text-align:center;padding:clamp(10px,3vw,28px) 0}.badge5{background:var(--green-l);color:var(--green-d);border-radius:100px;align-items:center;gap:8px;padding:8px 16px;font-size:13.5px;font-weight:800;display:inline-flex}.start h2{letter-spacing:-.02em;margin:20px 0 0;font-size:clamp(24px,4vw,36px);font-weight:800}.start p{max-width:520px;color:var(--muted);margin:12px auto 0;font-size:clamp(15px,1.9vw,17px);line-height:1.6}.seq-demo{flex-wrap:wrap;justify-content:center;gap:8px;margin:22px 0 6px;display:flex}.seq-demo span{border:1px solid var(--line);color:var(--muted);background:#fcfdfc;border-radius:10px;padding:8px 13px;font-size:15px;font-weight:800}.btn{cursor:pointer;background:var(--ink);color:#fff;box-shadow:none;border:none;border-radius:100px;justify-content:center;align-items:center;padding:16px 40px;font-family:inherit;font-size:16px;font-weight:800;transition:transform .16s,background .22s;display:inline-flex}.btn:hover{background:var(--green);box-shadow:none;transform:translateY(-2px)}.btn.big{background:var(--green);margin-top:26px;padding:18px 54px;font-size:17px}.btn.big:hover{background:var(--green-d)}.btn.ghost{color:var(--ink);border:1.5px solid var(--line);background:#fff}.btn.ghost:hover{background:var(--green-l);border-color:var(--green);color:var(--green-d);transform:translateY(-2px)}.arena{grid-template-columns:1fr 1fr;gap:clamp(16px,3vw,30px);display:grid}.pane{border:1px solid var(--line);background:#fcfdfc;border-radius:20px;flex-direction:column;justify-content:center;align-items:center;min-height:340px;padding:clamp(18px,2.6vw,26px);display:flex}.pane .plabel{letter-spacing:.6px;text-transform:uppercase;color:var(--muted);font-size:12.5px;font-weight:800}.bignum{letter-spacing:-.03em;color:var(--ink);margin:14px 0 4px;font-size:clamp(64px,13vw,120px);font-weight:800;line-height:1}.numhint{color:var(--muted);text-align:center;max-width:230px;margin-bottom:16px;font-size:13px;line-height:1.45}.trail{flex-wrap:wrap;justify-content:center;gap:7px;max-height:96px;margin-bottom:18px;display:flex;overflow:auto}.trail span{border:1px solid var(--line);color:var(--muted);background:#fff;border-radius:9px;padding:5px 10px;font-size:13.5px;font-weight:800}.trail span.cur{background:var(--green);border-color:var(--green);color:#fff}.nextbtn{cursor:pointer;border:1.5px solid var(--green);background:var(--green-l);color:var(--green-d);border-radius:100px;padding:13px 30px;font-family:inherit;font-size:15px;font-weight:800;transition:all .16s}.nextbtn:hover{background:var(--green);color:#fff;transform:translateY(-2px)}.nextbtn:disabled{opacity:.5;cursor:default;background:var(--green-l);color:var(--green-d);transform:none}.doneflag{color:var(--green-d);margin-top:6px;font-size:15px;font-weight:800}.hourglass{width:clamp(120px,26vw,150px);height:auto;margin:8px 0 6px;display:block}.timer{letter-spacing:.02em;color:var(--ink);font-variant-numeric:tabular-nums;font-size:clamp(40px,8vw,58px);font-weight:800;line-height:1}.timer.low{color:var(--red)}.tlabel{color:var(--muted);margin-top:8px;font-size:13px;font-weight:700}.tup{color:var(--red);margin-top:8px;font-size:14px;font-weight:800;display:none}.tup.on{display:block}.controls{grid-template-columns:1fr 1fr;gap:12px;margin-top:clamp(18px,2.6vw,26px);display:grid}.cbtn{cursor:pointer;border:1.5px solid var(--line);border-radius:16px;padding:17px 20px;font-family:inherit;font-size:16px;font-weight:800;transition:transform .16s,background .2s,border-color .2s,color .2s}.cbtn:hover{transform:translateY(-2px)}.cbtn.yes{background:var(--green);color:#fff;border-color:var(--green)}.cbtn.yes:hover{background:var(--green-d);border-color:var(--green-d)}.cbtn.no{color:var(--muted);background:#fff}.cbtn.no:hover{background:var(--red-l);border-color:var(--red);color:var(--red)}.done{text-align:center;padding:clamp(10px,3vw,26px) 0}.demoji{font-size:clamp(46px,9vw,64px);line-height:1}.done h2{letter-spacing:-.02em;margin:14px 0 0;font-size:clamp(24px,4vw,34px);font-weight:800}.done p{max-width:520px;color:var(--muted);margin:14px auto 0;font-size:clamp(15px,2vw,17.5px);line-height:1.65}.done p b{color:var(--ink)}.donerow{flex-wrap:wrap;justify-content:center;gap:12px;margin-top:26px;display:flex}.donerow a,.donerow button{text-decoration:none}.help{grid-template-columns:repeat(auto-fit,minmax(min(100%,300px),1fr));gap:16px;margin-top:clamp(26px,4vw,40px);display:grid}.hc{border:1px solid var(--line);background:#fcfdfc;border-radius:16px;padding:18px 20px}.hc h3{margin:0 0 7px;font-size:15px;font-weight:800}.hc p{color:var(--muted);margin:0;font-size:14px;line-height:1.55}@media (width<=640px){.arena{grid-template-columns:1fr}.pane{min-height:auto}}