.container {
    display: flex;
    justify-content: center;
    width: 100vw;
}
.center {
    display: block;
    margin-left: auto;
    margin-right: auto;
    width: 25%;
}
.center2 {
    display: block;
    margin-left: auto;
    margin-right: auto;
}
.header {
    display: flex;
    flex-direction: row;
    justify-content: space-between;
}
* {
    background-color: orange ;
}