#preloader {
    position: fixed;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 9999;
    background-color: #192b3c;
}

.spinner {
    width: 40px;
    height: 40px;
    border: 5px solid #ffffff;
    border-top: 5px solid #fcfcfc;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% {
        transform: rotate(0deg);
    }
    100% {
        transform: rotate(360deg);
    }
}

#content {
    display: none;
}