html, body {
    margin: 0;
    padding: 0;
}

.flex {
    display: flex;
}

.center {
    align-items: center;
    justify-content: center;
}


@media screen and (min-width: 376px) {
    html {
        font-size: calc(112.5% + 4 * (100vw - 414px) / 586);
    }
}