h1 {
    text-align: center;
}
header {
    background-color: #30283d;
    padding: 30px;
    width: 60vw;
    margin: auto;
    border-radius: 15px;
}
main {
    width: 50vw;
    margin: auto;
}
@media (prefers-color-scheme: light) {
    header {
        background-color: #ccb7ec;
    }
}