* { margin: 0; padding: 0; box-sizing: border-box; user-select: none; -webkit-tap-highlight-color: transparent; }
html, body { width: 100%; height: 100%; overflow: hidden; background: #87CEEB; font-family: sans-serif; touch-action: none; }
#menu {
    position: absolute; inset: 0; display: flex; flex-direction: column;
    align-items: center; justify-content: center; gap: 20px; z-index: 10;
    background: #87CEEB;
}
#menu h1 { font-size: 48px; color: #fff; text-shadow: 2px 2px 0 #333; }
#menu p { font-size: 20px; color: #fff; }
#startBtn {
    padding: 16px 48px; font-size: 24px; border: none; border-radius: 12px;
    background: #4CAF50; color: white; cursor: pointer; box-shadow: 0 4px 0 #2E7D32;
}
#startBtn:active { transform: translateY(2px); box-shadow: 0 2px 0 #2E7D32; }
#game { display: block; background: #87CEEB; }
#score {
    position: absolute; top: 20px; left: 20px; font-size: 24px;
    color: #fff; text-shadow: 1px 1px 0 #333; display: none;
}
</style>