footer {
    display: flex;
    flex-wrap: nowrap;
    background: rgba(0,0,0,0.5);
    padding: 20px;
    
    div {
        width: 100%;
        height: 100%;
        margin: auto;
        text-align: center;
    }

    p, a {
        font-size: clamp(0px, 3vw, 20px);
        text-align: center;
        color: #fff;
    }

    li::before {
        background: none;
        margin: 0;
    }

    #a-site:hover {
        text-decoration: underline;
    }

    img{
        width: clamp(0px, 100%, 100px);
    }
}

@media screen and (max-width: 530px) {
    footer {
        flex-wrap: wrap;
    }    
}

#footer-playground, #footer-portfolio {
    background: #0a0a0a;
    border-top: 0.25vh #fff solid;
}

#footer-project {
    border-top: 0.25vh #fff solid;
}