html {box-sizing: border-box;}

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

img {box-sizing: content-box;}

.redesSociales {
    display: flex;
    flex-wrap: wrap;
    margin: 0 auto;
    height: 300px; 
}

.columna {
    margin: 20px auto;
}

.imagen-enconstruccion {
    display: block;
    margin: 10px auto 0px auto;
    padding: 100px; 
    max-width: 900px;
}