body {
    margin: 0;
    overflow: hidden;
    background-color: #f0f0f0; /* White/Light background */
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

#container {
    width: 100vw;
    height: 100vh;
    display: block;
}

#ui-overlay {
    position: absolute;
    bottom: 20px;
    left: 50%;
    transform: translateX(-50%);
    width: 90%;
    max-width: 800px;
    text-align: center;
    background: rgba(255, 255, 255, 0.9);
    padding: 15px;
    border-radius: 12px;
    box-shadow: 0 4px 15px rgba(0,0,0,0.1);
    pointer-events: auto; /* Ensure clicks work */
}

.controls-panel {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
}

.instruction {
    font-size: 14px;
    color: #555;
    margin: 5px 0;
    line-height: 1.5;
}

.view-buttons {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
    justify-content: center;
}

button {
    background-color: #4CAF50;
    color: white;
    border: none;
    padding: 10px 20px;
    text-align: center;
    text-decoration: none;
    display: inline-block;
    font-size: 16px;
    margin: 4px 2px;
    cursor: pointer;
    border-radius: 6px;
    transition: background-color 0.3s;
}

button:hover {
    background-color: #45a049;
}

button:active {
    transform: scale(0.98);
}

#reset-scene {
    background-color: #f44336; /* Red for reset */
}

#reset-scene:hover {
    background-color: #d32f2f;
}