body {
margin: 0;
overflow: hidden;
}

.controls-tip {
position: fixed;
bottom: 20px;
left: 20px;
background: rgba(0, 0, 0, 0.6);
color: #ffdd99;
padding: 8px 15px;
border-radius: 8px;
font-family: monospace;
font-size: 14px;
pointer-events: none;
z-index: 100;
backdrop-filter: blur(4px);
border-left: 3px solid #ffaa66;
}

@media (max-width: 768px) {
.controls-tip {
    font-size: 10px;
    bottom: 10px;
    left: 10px;
}
}