:root{
  --bg1:#171226; --bg2:#0c0a14; --card:#241b3a; --line:#4a3a72;
  --ink:#f2ecff; --muted:#bdb0e0;
  --accent:#ffcc4d; --accent2:#ff8a3d; --good:#35e08c; --bad:#ff5c7a;
}
*{box-sizing:border-box;-webkit-tap-highlight-color:transparent}
html,body{margin:0;padding:0;height:100%}
body{
  font-family:"Segoe UI",system-ui,Roboto,sans-serif;color:var(--ink);
  background:radial-gradient(700px 420px at 20% -10%,#3b2a6a 0%,transparent 60%),
             linear-gradient(180deg,var(--bg1),var(--bg2));
  min-height:100vh;min-height:100dvh;display:flex;flex-direction:column;align-items:center;user-select:none;overflow-x:hidden;
}
.top{width:min(480px,100%);display:flex;align-items:center;justify-content:space-between;gap:10px;padding:12px 14px;flex-wrap:wrap}
.tt{font-weight:900;font-size:1.15rem;letter-spacing:.2px}
.stats{display:flex;gap:8px;flex-wrap:wrap;align-items:center}
.stats span{background:var(--card);border:1px solid var(--line);padding:5px 10px;border-radius:999px;font-size:.76rem;color:var(--muted)}
.stats b{color:var(--accent)}
.btns{display:flex;gap:8px}
.btns button{background:var(--card);border:1px solid var(--line);color:var(--ink);border-radius:10px;width:44px;height:44px;font-size:1rem;cursor:pointer}
.btns button:hover{border-color:var(--accent)}
.stage{position:relative;width:min(480px,100%)}
.panel{background:#130f20;border:1px solid var(--line);border-radius:20px;padding:16px}
.pads{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.pad{aspect-ratio:1;border-radius:16px;cursor:pointer;position:relative;transition:transform .06s;border:3px solid rgba(255,255,255,.12)}
.pad:active{transform:scale(.97)}
.p0{background:linear-gradient(#ff5c7a,#b31f3d)}
.p1{background:linear-gradient(#ffcc4d,#b37d1f)}
.p2{background:linear-gradient(#35e08c,#128a54)}
.p3{background:linear-gradient(#4fa8ff,#175aa0)}
.pad.lit{filter:brightness(1.65);box-shadow:0 0 26px rgba(255,255,255,.7);transform:scale(1.02)}
.pad.shake{animation:padShake .3s}
@keyframes padShake{0%,100%{transform:translateX(0)}25%{transform:translateX(-9px)}75%{transform:translateX(9px)}}
.status{margin-top:14px;text-align:center;color:var(--muted);font-weight:700;min-height:22px}
.overlay{position:absolute;inset:0;display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;
  background:rgba(10,7,18,.86);border-radius:20px;padding:24px;gap:14px;z-index:5}
.overlay h1{margin:0;font-size:1.9rem}
.overlay h1 span{color:var(--accent)}
.how{color:var(--muted);font-size:.92rem;line-height:1.6;max-width:360px;margin:0}
.how b{color:var(--ink)}
.big{background:linear-gradient(90deg,var(--accent),var(--accent2));color:#241a00;border:none;
  font-size:1.12rem;font-weight:900;padding:14px 34px;border-radius:999px;cursor:pointer;letter-spacing:.5px}
.big:hover{transform:scale(1.05)}
.tiny{color:var(--muted);font-size:.72rem;margin:0}
.bottombar{color:var(--muted);font-size:.8rem;padding:12px;text-align:center}
.home{position:fixed;right:12px;bottom:8px;color:var(--muted);background:var(--card);border:1px solid var(--line);
  border-radius:999px;padding:7px 13px;font-size:.8rem;text-decoration:none;z-index:20}
.home:hover{color:var(--accent)}
html,body{overscroll-behavior:none;touch-action:manipulation}
@media (max-width:420px){.stats span{padding:4px 8px;font-size:.7rem}.tt{font-size:1rem}.stats{gap:6px}}
@media (orientation:landscape) and (max-height:540px){.bottombar,.home{display:none}.pads{max-width:420px;margin:auto}}