.difficulty-radio {
    margin: 0 0 1.5rem;
    box-sizing: border-box;
    font-size: 0;
    display: flex;
    flex-flow: row nowrap;
    justify-content: flex-start;
    align-items: stretch;
}
.difficulty-radio input {
    width: 0;
    height: 0;
    position: absolute;
    left: -9999px;
}
.difficulty-radio input + label {
    margin: 0;
    padding: 0.75rem 2rem;
    box-sizing: border-box;
    position: relative;
    display: inline-block;
    background-color: var(--Button-Light-Default-Background);
    font-size: 1rem;
    line-height: 140%;
    font-weight: 600;
    text-align: center;
    box-shadow: 0 0 0 rgba(255, 255, 255, 0);
    transition: border-color 0.15s ease-out, color 0.25s ease-out, background-color 0.15s ease-out, box-shadow 0.15s ease-out;
    /* ADD THESE PROPERTIES TO SWITCH FROM AUTO WIDTH TO FULL WIDTH */
    /*flex: 0 0 50%;
     display: flex;
     justify-content: center;
     align-items: center;
    */
    /* ----- */
}
.difficulty-radio input + label:first-of-type {
    border-radius: 6px 0 0 6px;
    border-right: none;
}
.difficulty-radio input + label:last-of-type {
    border-radius: 0 6px 6px 0;
    border-left: none;
}

.difficulty-radio input:checked + label {
    background-color: #4b9dea;
    color: #fff;
    box-shadow: 0 0 10px rgba(102, 179, 251, .5);
    border-color: #4b9dea;
    z-index: 1;
}

@media (max-width: 800px) {
    .difficulty-radio input + label {
        padding: 0.75rem 0.25rem;
        flex: 0 0 50%;
        display: flex;
        justify-content: center;
        align-items: center;
    }
}
