body {
    font-family: 'Inter', sans-serif;
    margin: 0;
    padding: 0;
    overflow: hidden;
}
#scene-container {
    width: 100vw;
    height: 100vh;
    position: absolute;
    top: 0;
    left: 0;
    z-index: 10;
}
#controls {
    position: absolute;
    top: 20px;
    left: 20px;
    background-color: rgba(255, 255, 255, 0.95);
    padding: 1.5rem;
    border-radius: 0.75rem;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    z-index: 20;
    display: flex;
    flex-direction: column;
    gap: 1rem;
    min-width: 250px;
    transform: translateX(-120%);
    opacity: 0;
    transition: transform 0.3s ease-out, opacity 0.3s ease-out;
    pointer-events: none;
}
#controls.visible {
    transform: translateX(0);
    opacity: 1;
    pointer-events: auto;
}
.control-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}
input[type="checkbox"] {
    width: 1.25rem;
    height: 1.25rem;
}
select, input[type="number"] {
    width: 100%;
    padding: 0.5rem;
    border-radius: 0.375rem;
    border: 1px solid #D1D5DB; /* gray-300 */
    cursor: pointer;
}
input[type="number"] {
    cursor: text;
}
#result-area {
    margin-top: 0.5rem;
    padding: 0.75rem;
    background-color: #F3F4F6; /* gray-100 */
    border-radius: 0.375rem;
    border: 1px solid #E5E7EB; /* gray-200 */
}
#result-display {
    font-weight: 600; /* semibold */
    color: #1F2937; /* gray-800 */
    text-align: center;
}
#star-rating-display {
    font-size: 1.5rem; /* larger for stars */
    line-height: 2rem;
    color: #F59E0B; /* amber-500 for stars */
    min-height: 2rem; /* prevent layout shift */
}

/* --- Mobile Responsiveness --- */
@media (max-width: 640px) {
    #toggle-controls-btn {
        top: auto;
        bottom: 20px;
        left: 20px;
    }
    #controls {
        top: auto; /* Unset top positioning */
        bottom: 0;
        left: 0;
        width: 100%;
        border-radius: 0.75rem 0.75rem 0 0; /* Round top corners */
        max-height: 50vh; /* Limit height to 50% of viewport */
        overflow-y: auto; /* Allow scrolling if content overflows */
        transform: translateY(120%);
    }
    #controls.visible {
        transform: translateY(0);
    }
}