body {
    margin: 0;
    overflow: hidden;
    background-color: #111;
    color: #fff;
    font-family: sans-serif;
}

#ui-panel {
    position: absolute;
    top: 20px;
    left: 20px;
    background: rgba(0, 0, 0, 0.7);
    padding: 20px;
    border-radius: 8px;
    z-index: 10;
    pointer-events: auto;
}

h1 {
    margin-top: 0;
    font-size: 1.5rem;
}

.controls {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

button, input[type="file"] {
    padding: 10px;
    background: #333;
    color: white;
    border: 1px solid #555;
    border-radius: 4px;
    cursor: pointer;
}

button:hover {
    background: #444;
}

#status {
    margin-top: 15px;
    font-size: 0.9rem;
    color: #aaa;
}

#three-canvas {
    display: block;
    width: 100vw;
    height: 100vh;
}