body{
    margin:0px;
}
#first_imagine{
    position:relative;
    width:50%;
    margin-top:70px; 
    float:left;
}
#second_image{
    position:relative;
    width:50%;
    margin-top:70px;
    float:right;
}
#description{
    float:none;
    width:calc(100% -40px);
    max-width: 900;
    margin:auto;
    text-align: center;
    font-size: 20px;
    margin-top: 50px;
    padding:20px;
}
#description  b{
    font-size:25px;
    line-height: 3;
}
@media screen and (max-width:1000px) {
    #first_imagine{

        width:90%;
    }
    #second_image{
        width:90%;
        margin:0px;
    }
}
@media screen and (min-width:3000px) {
    #first_imagine,#second_image{
        max-width: 1500px;
    }
    #container_images{
        width:3000px;
        margin:auto;
    }
}