body {
    margin: 0;
    padding: 0;
    background-color: #333;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
}

#c {
    width: 100%;
    height: 100%;
    position: relative;
}

#i {
    width: 100%;
    height: auto;
    display: none; 
}

#s {
    border: 5px solid transparent;
    border-top-color: #FFF;
    border-radius: 50%;
    width: 50px;
    height: 50px;
    animation: spin 1s linear infinite;
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
}

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