html {
    box-sizing: border-box;
    font-size: 62.5%;
}

*,
*:before,
*:after {
    box-sizing: inherit;
}

body {
    font-family: 'Raleway', sans-serif;
    font-size: 1.6rem;
}

img {
    width: 30%;
}

h1 {
    font-size: 4rem;
}
article{
    margin-top: 50px;
    margin-bottom: 50px;
    margin-left: 20px;
    margin-right: 20px;
}
.contenedor {
    max-width: 100%;
    width: 100%;
    margin: 0 auto;
    background-color:#D3D9E9;
}

.color1{
    background-color:#D3D9E9;
}

.color2{
    background-color: #A6A9C8;
}
.img2{
    width: 250px;
}
.imgborder{
    border-radius: 75px;
}
/** CODIGO AQUI **/
@media (min-width: 762px) {
    .dos-columnas{
        display: grid;
        grid-template-columns: repeat(2,1fr);
        column-gap: 2rem;
    }
    .tres-columnas{
        display: grid;
        grid-template-columns: repeat(3,1fr);
        column-gap: 2rem;
    }
}