*{
    margin:0;
    padding: 0;
    box-sizing: border-box;
    font-family: gilroy;

}

html,body{
    height: 100%;
    width: 100%;
}
body{
    background-color: #111;

}

#box1{
    height: 200px;
    width: 200px;
    background-color: crimson;
}
#box2{
    height: 200px;
    width: 200px;
    background-color: lightseagreen;
}
#box3{
    height: 200px;
    width: 200px;
    background-color: royalblue;
}