#loading-screen {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 9999;
    border: none;
}

.main-content {
    opacity: 0;
    transition: opacity 0.5s ease-in-out;
}

.main-content.loaded {
    opacity: 1;
}