#portafolio button {
    display: block;
    position: relative;
    margin: 1rem auto;
    max-width: 400px;
    min-height: 300px;
    overflow: hidden;
    box-shadow: 0 0 10px var(--gray2);
    padding: 0;
    border: none;
    cursor: pointer;
}

@media only screen and (max-width: 500px) {
    #portafolio button {
        width: 250px;
        min-height: 200px;
    }
    #portafolio img {
        width: 246px;
    }
}

#portafolio img {
    display: block;
    max-height: 300px;
    transition: transform ease .3s;
}

#portafolio button:hover img {
    transform: scale(1.25);
}

#portafolio button:before {
    content: '';
    background-color: var(--primary);
    width: 100%;
    height: 100%;
    position: absolute;
    z-index: 1;
    top: 0;
    left: 0;
    transition: opacity ease .3s;
    opacity: 0;
    
}

#portafolio button:hover:before {
    opacity: 0.75;
}

#portafolio h4 {
    display: block;
    margin: 0;
    position: absolute;
    z-index: 2;
    bottom: 0%;
    left: 50%;
    transform: translate(-50%, 50%);
    color: var(--white);
    opacity: 0;
    transition: bottom ease .3s opacity ease .3s;
}

#portafolio button:hover h4{
    bottom: 30%;
    opacity: 1;
}

#portafolio button:after {
    content: url('../img/icons/zoom.svg');
    width: 50%;
    position: absolute;
    z-index: 2;
    left: 50%;
    top: 0%;
    transform: translate(-40%, -50%);
    opacity: 0;
    transition: top ease .3s, opacity ease .3s;
}

#portafolio button:hover:after {
    top: 35%;
    opacity: .75;
}

@media only screen and (min-width: 1201px){
    #portafolio > div{
        display: grid;
        grid-template-columns: 1fr 1fr 1fr;
        grid-gap: 2rem;
        margin: 1rem;
    }
}

@media only screen and (max-width: 1200px){
    #portafolio > div{
        display: grid;
        grid-template-columns: 1fr;
        grid-gap: 2rem;
        margin: 1rem;
    }
}