@import url('https://fonts.googleapis.com/css2?family=Poppins:wght@300&display=swap');

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

body {
    font-family: sans-serif;
    background-color: #090221;
    display: grid;
    place-content: center;
    height: 100vh;
    padding: 5px;
    color: #fff;
}

/* ======================== */

.card{
    width: 150px;
    height: 200px;
    position: relative;
}
.card-inner{
    width: inherit;
    height: inherit;
    background-color: 
    rgba(255, 255, 255, .05);
    box-shadow: 0 0 10px 
    rgba(0, 0, 0, 0.25);
    backdrop-filter: blur(10px);
    border-radius: 8px;
}
.circle{
    width: 100px;
    height: 100px;
    background: 
    radial-gradient(#b0e633,
    #53ef7d);
    border-radius: 50%;
    position: absolute;
    animation: move-up 2s ease-in 
    infinite alternate-reverse;
}
.circle:nth-child(1){
    top: -25px;
    left: -25px;
}
.circle:nth-child(2){
    bottom: -25px;
    right: -25px;
    animation-name: move-down;
}

@keyframes move-up{
    to{
        transform: translateY(-10px);
    }
}
@keyframes move-down{
    to{
        transform: translateY(10px);
    }
}