Adjust web page for Android with css, activate scrollbar

I'm trying to adjust my web page to visualize in android with css but nothing else lets me show the top part, but it does not allow me to scroll down. I have this configuration in the body:

body {
width: 100%;
min-height: 50%;
margin: 0;
padding: 0;
height: 100%;
overflow: hidden;
background-image: url('Image/lukas-vandlis-643404-unsplash.jpg');
background-position: center center;
background-repeat: no-repeat;
background-size: cover;
height: 100vh;
font-family: 'Heebo', sans-serif;
}

and for mobile devices I have (user is a div where is all the information):

@media screen and (max-width: 600px) {
.usuario {
    width: 100%;
    height: 100%;
    position: center;

}
}

and it shows me like that

And below I have a GridView with information.