#vr-button{background-color:#000}#file-picker{position:fixed;top:20px;left:20px;z-index:1000;background:#000000b3;padding:10px;border-radius:5px}#file-select{padding:8px;font-size:14px;background:#333;color:#fff;border:1px solid #666;border-radius:4px;min-width:300px}#file-select optgroup{font-weight:700;color:#4a9eff}#file-select option{color:#fff;padding:4px}#file-select option:hover{background:#4a9eff}