html, body {
    margin: 0;
    padding: 0;
    overflow: hidden;
}

body {
    background: #111;
    color: white;
    font-family: monospace;
}

#ui {
    position: fixed;
    top: 12px;
    right: 12px;
    display: flex;
    gap: 8px;
    z-index: 10;
}

button {
    font: 14px monospace;
    padding: 6px 10px;
    border: none;
    cursor: pointer;
}

button:hover {
    opacity: 0.8;
}

.drag-on {
    background: #2e7d32;
    color: white;
}

.drag-off {
    background: #7d2e2e;
    color: white;
}

canvas {
        display: block;
}