smov/src/components/NumberSelector.css

.numberSelector {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(2.5rem, 1fr));
    gap: 5px;
    position: relative;
    margin-bottom: 1.5rem;
}

.numberSelector .choiceWrapper {
    position: relative;
    border-radius: 10%;
    overflow: hidden;
}

.numberSelector .choiceWrapper::before {
    content: '';
    display: block;
    width: 100%;
    padding-bottom: 100%;
}

.numberSelector .choice {
    position: absolute;
    top: 0; 
    left: 0;
    width: 100%;
    height: 100%;
    background-color: var(--choice);
    margin-right: 5px;
    padding: .2rem;
    display: flex;
    justify-content: center;
    align-items: center;
    text-align: center;
    color: var(--text);
    font-weight: bold;
    cursor: pointer;
    user-select: none;
    box-sizing: border-box;
}

.numberSelector .choice:hover { 
    background-color: var(--choice-hover);
}

.numberSelector .choice.selected {
    color: var(--choice-active-text, var(--text));
    background-color: var(--choice-active);
}