body {
    background-color: #333;
}

#spinner {
    position: absolute;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
}

#spinner::before {
    content: "";
    box-sizing: border-box;
    position: relative;
    display: block;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    border-color: #fff #fff2 #fff2 #fff2;
    border-width: 5px;
    border-style: solid;
    -webkit-animation: spin 1s infinite linear;
    animation: spin 1s infinite linear;
}

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

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