@media (max-width: 1000px){
    
    #login, #header{
        min-height: 0;
    }
    
    #login{
        margin-top:10px;
    }
    
    .img-header{
        background-size: auto;
        border-radius: 5px;
        height: 100px;
        padding-top: 30px;
    }
    
    .spazio, .spazio-piccolo{
        min-height: 10px;
    }
    
    .center{
        margin-left:1%;
        margin-right: 1%;
    }
    
    #registrazione h2, #attivazione h2{
        font-size: 20px;
    }
    
    .indicazioni{
        margin-left:0;
        margin-right:0;
    }
}

@media (max-width: 415px){
    .header-title{
        font-size: 18px;
    }
    .login-title{font-size:20px;}
}