.h3{ 
    text-align: center;
}
.ex3{
    text-align: center;
}


.submit{
    justify-content: center;
}
 .container{
    border: 1px solid black;
    width: auto;
justify-content: center;
    background-repeat: no-repeat;
background-attachment: fixed;
background-size: 100% 100%;
display: flex;
justify-content: center;
align-items: center;
margin-top: 120px;


}
.h3{
    text-align: center;
}
.foot{
    justify-content: center;
    display: flex;
    justify-content: center;
    margin-left: 250px;
    margin-right: 500px;
    width: -100px;
}