.flex-row {
    display: flex;
    flex-direction: row;
}
.ai-items-center {
    align-items: center;
}
.jc-center {
    justify-content: center;
}
.jc-space-between{
    justify-content: space-between;
}
.flex-column {
    display: flex;
    flex-direction: column;
}
.flex-column-items-center {
    display: flex;
    flex-direction: column;
    align-items: center;
}
.select-btn-group {
    display: flex;
    flex-direction: row;
    justify-content: space-between;
    box-sizing: border-box;
    margin: 1.2rem 0;
}
.select-btn-group button {
    width: 45%;
    padding: .5rem 0;
    font-size: 1.1rem;
}