div{
    width: 50%;
}
#section4 div 
{
    width:80%;
}
article{
    height: 400px;
     width: 356px;  
}
form{
    width: 50%;
}
input{
    width:40%;
}
button{
    width: 80px;
}
iframe{
    width: auto;
}
textarea{
    width: 40%;
}
#section2  
{
    height:1200px;
}
#section1  
{
    height:1000px;
}