:root {

}
button, input[type="submit"], input[type="reset"] {
    background: none;
    color: inherit;
    border: none;
    padding: 0;
    font: inherit;
    outline: inherit;
    cursor: inherit;
}
.hidden {
    display: none;
}
.content {
    display: flex;
    align-content: center;
    justify-content: center;
    flex-direction: column;
}