.blob {
    display: flex;
    justify-content: center;
    align-items: center;
    width: 550px;
    height: 550px;
    border-radius: 100%;
    background-image: linear-gradient(#1100ff 10%, #ff00f2);
    filter: blur(300px);
    transition: all 450ms ease-out;
    position: fixed;
    pointer-events: none;
    left: 0;
    top: 0;
    transform: translate(calc(-50% + 15px), -50%);
    z-index: -1;
}