body {
    width: 100%;
    height: 100vh;
    margin: 0;
    display: flex;
    justify-content: center;
    align-items: center;
    flex-direction: column;
    color: white;
    font-family: "Montserrat", sans-serif;
    font-optical-sizing: auto;
    font-weight: 100;
    font-style: normal;
    background-color: #0d0d0d;
    transition: 0.5s;
}

.main:not(hover) {
    display: flex;
    justify-content: center;
    align-items: center;
    flex-direction: column;
    background-color: transparent;
    animation: border-animation alternate infinite 1s;
    margin: 20px;
    padding: 20px;
}

.main:hover[body] {
    background-color: aliceblue;
}

@keyframes border-animation {
    0% {
        box-shadow: 0px 0px 20px aqua;
        border: 1px solid aqua;
    }

    100% {
        box-shadow: 0px 0px 1px aqua;
        border: 1px solid #0d0d0d;
    }
}

footer {
    display: flex;
    align-items: center;
    justify-content: center;
    position: fixed;
    flex-direction: column;
    border-top: 1px solid aqua;
    width: 100%;
    padding: 20px;
    bottom: 0;
}

footer img{
    transform: translateY(10px);
}