html {
    background-color: white;
    width: 100vw;
    height: 100vh;
    margin: 0;
    display: flex;
    flex-direction: row;
    ustify-content: center;
}
            
.sticky {
    position: fixed;
    top: 0;
    width: 100%;
}
            
.content {
    padding: 10px;
}
            
.sticky + .content {
    padding-top: 10px;
}
            
.row {
    display: flex;
    flex-direction: row;
    justify-content: center;
}
            
.column {
    display: flex;
    flex-direction: column;
    justify-content: center;
}
            
            
@media only screen and (max-width: 600px) {
    body {
        background-color: #FFF;
        width: 100vw;
        height: 100vh;
        margin: 0;
    }
                
    header {
        width: 100%;
        height:45px;
        padding-left: 10px;
        padding-right: 10px;
    }
                
}
            
@media only screen and (min-width: 600px){
    body{
        background-color: #FFF;
        width:600px;
        height: 100%;
        margin: 0;
    }
                
    header {
        width: 600px;
        height:45px;
        padding-left: 10px;
        padding-right: 10px;
    }
                
}