:root {
  --bg:#70c5ce;
  --ground:#d1963a;
  --pipe:#2ea043;
  --bird:#ffce00;
  --panel: rgba(0,0,0,0.5);
}

html,body {
  height:100%;
  margin:0;
  font-family:system-ui,-apple-system,Segoe UI,Roboto,"Helvetica Neue",Arial;
}

.wrap {
  display:flex;
  align-items:center;
  justify-content:center;
  height:100vh;
  background:linear-gradient(#a0e9ff,#70c5ce);
  padding:20px;
  box-sizing:border-box;
}

canvas {
  background:linear-gradient(#87ceeb,#70c5ce);
  border-radius:10px;
  box-shadow:0 8px 30px rgba(0,0,0,0.2);
}

.ui {
  position:fixed;
  left:20px;
  top:20px;
  color:#fff;
  display:flex;
  gap:10px;
  align-items:center;
}

.panel {
  background:var(--panel);
  padding:10px 14px;
  border-radius:10px;
  color:#fff;
  font-weight:600;
  backdrop-filter: blur(4px);
}

.centerOverlay {
  position:absolute;
  left:50%;
  top:50%;
  transform:translate(-50%,-50%);
  text-align:center;
  color:#fff;
  pointer-events:none;
}

.button {
  display:inline-block;
  background:#fff;
  color:#222;
  padding:8px 12px;
  border-radius:8px;
  font-weight:700;
  cursor:pointer;
  user-select:none;
  pointer-events:auto;
  margin-top:8px;
}

footer {
  position:fixed;
  left:0;
  right:0;
  bottom:8px;
  text-align:center;
  color:#fff;
  opacity:0.85;
  font-size:13px;
}

@media (max-width:600px) {
  canvas {
    width:330px;
    height:600px;
  }
}