*{box-sizing:border-box;-webkit-tap-highlight-color:transparent}
html,body{margin:0;height:100%;overflow:hidden;background:#0d1220;
  font-family:system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  user-select:none;-webkit-user-select:none;touch-action:none;overscroll-behavior:none}
#play{position:fixed;inset:0}
#view{position:absolute;inset:0;width:100%;height:100%;display:block}

#hud{position:absolute;top:0;left:0;right:0;display:flex;gap:6px;align-items:center;
  padding:8px;z-index:10;opacity:0;transition:.2s;flex-wrap:wrap}
#hud.on{opacity:1}
.chip{background:rgba(10,16,32,.62);color:#fff;border-radius:999px;padding:5px 12px;
  font-size:clamp(12px,3.2vw,15px);font-weight:700;backdrop-filter:blur(4px)}
.btn-chip{border:0;cursor:pointer}

#pad{position:absolute;inset:auto 0 0 0;display:flex;justify-content:space-between;
  gap:10px;padding:0 10px calc(12px + env(safe-area-inset-bottom));z-index:11}
#pad button{flex:1;max-width:44%;height:clamp(66px,17vw,90px);border:0;border-radius:20px;
  font-size:clamp(16px,4.4vw,22px);font-weight:900;color:#fff;cursor:pointer;
  backdrop-filter:blur(3px);box-shadow:0 5px 0 rgba(0,0,0,.32)}
#bgas{background:rgba(72,168,96,.78)}
#bbrake{background:rgba(200,72,63,.72)}
#pad button.down{transform:translateY(4px);box-shadow:0 1px 0 rgba(0,0,0,.32);filter:brightness(1.2)}

#menu,#over{position:absolute;inset:0;display:none;place-items:center;z-index:30;
  background:rgba(8,12,26,.66);backdrop-filter:blur(3px);padding:12px;overflow:auto}
#menu.on,#over.on{display:grid}
.card{width:min(94vw,460px);background:#f6f3ea;border-radius:22px;padding:20px;
  text-align:center;box-shadow:0 20px 60px rgba(0,0,0,.5);margin:auto}
.card h1{margin:0 0 8px;font-size:clamp(26px,7vw,40px)}
.tag{margin:0 0 16px;font-size:clamp(13px,3.3vw,15px);line-height:1.55;opacity:.78}
.levels{display:grid;gap:8px}
.lvl{display:grid;grid-template-columns:34px 1fr auto;gap:10px;align-items:center;
  border:0;border-radius:14px;padding:12px;background:#fff;cursor:pointer;
  box-shadow:0 3px 0 #ddd8cc;text-align:left;font-size:15px;font-weight:700;color:#22252e}
.lvl b{background:#3f7fe0;color:#fff;border-radius:9px;padding:5px 0;text-align:center}
.lvl i{font-style:normal;font-size:12.5px;font-weight:600;opacity:.7;white-space:nowrap}
.lvl.locked{opacity:.5;cursor:not-allowed;box-shadow:none}
.lvl.locked b{background:#9aa0aa}
.stars{font-size:38px;color:#e8a83a;letter-spacing:4px;margin:4px 0 6px}
.line{margin:0 0 14px;font-size:16px;line-height:1.5}
.big{display:block;width:100%;margin:8px 0 0;border:0;border-radius:16px;padding:15px;
  background:#48a860;color:#fff;font-size:19px;font-weight:800;cursor:pointer;box-shadow:0 5px 0 #2f7a44}
.big.alt{background:#3f7fe0;box-shadow:0 5px 0 #2a5aa8}
.big.ghost{background:#e2ddd0;color:#3a3a40;box-shadow:0 5px 0 #c8c2b2}
.big:active{transform:translateY(3px)}