/* Importing Poppins font from Google Fonts */
@import url('https://fonts.googleapis.com/css2?family=Poppins:wght@400;500;600;700&display=swap');

* {
    margin: 0;
    padding: 0;
    
    font-family: 'Poppins', sans-serif;
}

html, body {
    display: grid;
    height: 100%;
    place-items: center;
    background: #000;
}

.button a {
    position: relative;
    display: block;
    height: 70px;
    width: 220px;
    background: linear-gradient(115deg, #4fcf70, #fad648, #a767e5, #12bcfe, #44ce7b);
    text-align: center;
    border-radius: 10px;
}

.button a span {
    height: 88%;
    width: 96%;
    background: #111;
    display: block;
    position: absolute;
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%);
    border-radius: 6px;
    line-height: 60px;
    color: #f5f5f5;
    font-size: 25px;
}

.button a:hover {
    animation: animate 0.4s linear infinite;
}

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