body { margin: 0; overflow: hidden; background-color: #000; }
#canvas-container { width: 100vw; height: 100vh; }

.lil-gui.root {
    position: absolute !important;
    top: auto !important;
    bottom: 20px !important;
    right: 20px !important;
}

#overlay {
    position: absolute;
    top: 0; left: 0; width: 100%; height: 100%;
    background: rgba(0,0,0,0.8);
    display: flex;
    justify-content: center;
    align-items: center;
    color: white;
    font-family: monospace;
    font-size: 24px;
    cursor: pointer;
    z-index: 1000;
    flex-direction: column;
    text-align: center;
}
#overlay span {
    font-size: 14px;
    color: #888;
    margin-top: 15px;
}
.highlight { color: #ffaa00; font-weight: bold; }