produto.css

@media (min-width: 600px){
    .imgprod {
        float: left;
    }
}

@media (min-width: 630px) {
    .produto {
    position: relative;
    padding-left: 40%;
    }
    .cores {
    position: static;
    padding: 0;
    }
    .cores legend {
        position: static;
    }
    /*C
    .cores label img {
        max-height: 100%;
        max-width:35%;
        position: absolute;
        top: 0;
        left: 0;
    }
    C*/
    .imgprod{
        max-height: 100%;
        max-width:35%;
        position: relative;
        top: 0;
        left: 0;
    }
    .cores label:after {
        position: static;
        float: left;
        margin-right: 10px
    }
    .produto {
        font-size: 1.2em;
    }
}
@media (min-width: 600px){
    img {
        float: left;
    }
}

.imgprod {
    float: left;
    position: relative;
}
/* */
label[for=verde]:after {
    background-color: #33CC66;
    left: 0;
}
label[for=rosa]:after {
    background-color: #FF6666;
    left: 60px;
}
label[for=azul]:after {
    background-color: #6666FF;
    left: 120px;
}
.cores {
    position: relative;
    padding-top: 90px;
}
.cores input:checked + label::after {
    border: 6px solid rgba(0,0,0,0.3);
}
.cores label:after{
    content: '';
    display: block;
    border-radius: 50%;
    width: 50px;
    height: 50px;
    position: absolute; /* static
    margin-right: 10px;*/
    float: left;
    top: 30px;
    border: 6px solid rgba(0,0,0,0);
    transition: 1s;
    -moz-box-sizing: border-box;
         box-sizing: border-box;
}
.cores label:hover:after{
    border: 6px solid rgba(0,0,0,0.1);
}
.cores input[type=radio]{
    display: none;
}
.cores input:not(:checked) + label img {
    display: none;
}
.cores legend {
    position: static;
    top: 0;
    left: 0;
}
.cores label img{
    display: block;
    max-width: ; // 35%
    max-height: ; // 100%
}
.produto {
    background: black; /* */
    color: #333;
    line-height: 1.3;
    margin-top: 2em;
    position: static; /* relative */
    font-size: 1.2em;
}
.produto h1 {
    font-size: 1.8em;
    font-weight: bold;
}
.produto p {
    font-size: 1.2em;
    font-style: italic;
    margin-bottom: 1em;
}
.produto legend {
    display: block;
    font: bold 0.9em/2.5 Arial;
    text-transform: uppercase;
}
.comprar {
    background: #91BD3C;
    border: none;
    color: #333;
    font-size: 1.4em;
    text-transform: uppercase;
    box-shadow:  0 1px 3px #777;
    display: block;
    padding: 0.5em 1em;
    margin: 1em 0;
}