* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(30deg, purple, darkorange);
    font-family: "Roboto";
    color: lightblue;
    transform: scale(1.1);
    overflow: hidden;
}

.porter {
    position: relative;
    width: 400px;
    height: 400px;
    animation: change 1s linear infinite;
}

.porter span {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    transform: rotate(calc(36deg * var(--i)));
    letter-spacing: 0.025rem;
}

.porter span::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    width: 120px;
    height: 40px;
    border-radius: 50%;
    border: 1px solid azure;
    box-shadow:
        0px 0px 10px yellow,
        -20px -20px 0px azure,
        -30px -30px 0px lightseagreen,
        0px 0px 6px lightpink,
        -30px -30px 2px yellow,
        -2px 20px 2px aqua,
        -20px 80px 1px lawngreen;
    background: transparent;
    animation: animate 2.5s linear infinite;
}

@keyframes animate {
    0% {
        transform: rotate(0deg);
        filter: hue-rotate(0deg);
    }
    100% {
        transform: rotate(360deg);
        filter: hue-rotate(360deg);
    }
}

@keyframes change {
    0% {
        filter: hue-rotate(0deg);
    }
    100% {
        filter: hue-rotate(180deg);
    }
}

.field span {
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    font-size: 2rem;
    padding: 0 20px;
    text-shadow: 0px 1px 2px rgba(0, 0, 0, 0.2);
    font-size: 40px;
    color: lime;
}

@media screen and (max-width: 768px){
    body{
        background: linear-gradient(20deg, rgb(13, 1, 95), rgb(237, 21, 136));
        transform: scale(1.0);
    }
}

@media screen and (max-width: 576px){
    body{
        background: linear-gradient(5deg, rgb(19, 2, 135), lime);
        transform: scale(0.7);
    }
}