*{
    padding: 0;
    margin: 0;
    box-sizing: border-box;
}
body{
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    background: #222;
}
.loader{
    position: relative;
    width: 300px;
    height: 300px;
    background: rgb(110, 110, 255);
    border-radius: 50%;
    display: flex;
    align-items: center;
    box-shadow: 5px 0 5px 5px rgba(14, 14, 14, 0.5);
    justify-content: center;
}
h1{
    z-index: 1;
    font-family: Arial, Helvetica, sans-serif;
    color: #fff;
}
.loader::before{
    content: '';
    position: absolute;
    top: 0;
    border: 40px solid transparent;
    inset: 0;
    border-top: 40px solid blue;
    border-radius: 50%;
    animation: animate 1s linear infinite;
}
@keyframes animate{
    0%{
        transform: rotate(0deg);
    }
    100%{
        transform: rotate(360deg);
    }
}
.loader::after{
    content: '';
    position: absolute;
    top: 40px;
    width: 220px;
    height: 220px;
    background: #222;
    border-radius: 50%;
    box-shadow: inset 5px 0 5px rgba(255,255,255,0.5),
    inset -5px 0 5px rgba(0, 0, 0, 0.5);
}