.flex{
    display: flex;
}
.justify-content{
    justify-content: center;
}
.border{
    border: 2px solid black;
    margin: 3px;
}
.item-center{
    align-items: center;
}

.invert{
    filter: invert(1)
}

.rounded{
    border-radius: 8px;
}