.box-container .box {
    width: 80%; 
height: 50vh;
}



/* Small devices (portrait tablets and large phones, 600px and up) */
@media only screen and (min-width: 600px) {
    
}

/* Medium devices (landscape tablets, 768px and up) */
@media only screen and (min-width: 768px) {
    .box-container .box {width: 70%;
        height: 60vh; }
}

/* Large devices (laptops/desktops, 992px and up) */
@media only screen and (min-width: 992px) {
    .box-container .box {width: 50%;
        height: 80vh; }
}

/* Extra large devices (large laptops and desktops, 1200px and up) */
@media only screen and (min-width: 1200px) {
    
}