body {
    margin: 0;
    overflow: hidden;
    font-family: Arial, sans-serif;
}

#crosshair {
    position: absolute;
    top: 50%;
    left: 50%;
    width: 20px;
    height: 20px;
    margin-left: -10px;
    margin-top: -10px;
    color: white;
    font-size: 20px;
    text-align: center;
    line-height: 20px;
    pointer-events: none;
    z-index: 10;
}

#instructions {
    position: absolute;
    top: 10px;
    left: 10px;
    color: white;
    background: rgba(0, 0, 0, 0.5);
    padding: 10px;
    border-radius: 5px;
    pointer-events: none;
    z-index: 10;
}

#model-selector {
    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;
    z-index: 20;
}

.hidden {
    display: none !important;
}

.models-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
    max-height: 80vh;
    overflow-y: auto;
    padding: 20px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 10px;
}

.model-item {
    width: 150px;
    height: 150px;
    background: rgba(255, 255, 255, 0.2);
    border: 2px solid transparent;
    border-radius: 5px;
    cursor: pointer;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    color: white;
    transition: all 0.2s;
}

.model-item:hover {
    background: rgba(255, 255, 255, 0.3);
    border-color: #00ffff;
}

.model-preview {
    width: 100px;
    height: 100px;
    /* Placeholder for actual 3d preview or icon */
    background: #333; 
    margin-bottom: 10px;
}