:root {
    --prim-col: #ff4940;
    --fg-col: #fff;
    --bg-col: #111;
    --prim-border: 1px solid var(--fg-col);
    --base-font: 400 1rem/1.5rem 'IBM Plex Sans', sans-serif;
}

.categories-container {
    display: flex;
    flex-flow: row wrap;
    justify-content: space-between;
    width: calc(100% + 1rem);
    margin-top: 2rem;
    margin-bottom: 2rem;
}

.category-item {
    display: inline-flex;
    flex-flow: row nowrap;
    justify-content: space-between;
    align-items: flex-end;
    min-width: calc((100% / 3) - 2rem);
    margin: 0 1rem 1rem 0;
    border-bottom: var(--prim-border);
    cursor: pointer;
}

.category-item span {
    color: var(--fg-col);
    font: var(--base-font);
    font-style: italic;
}

.category-box {
    display: inline-block;
    width: 1.25rem;
    height: 1.25rem;
    margin-left: 1rem;
    transform: translateY(1px);
    border: var(--prim-border);
    border-bottom: none;
}

.category-item-active {
    border-bottom-color: var(--prim-col);
    animation: category-item-active-in-anim 0.5s;
}

@keyframes category-item-active-in-anim {
    from {
        border-bottom-color: var(--fg-col);
    }

    to {
        border-bottom-color: var(--prim-col);
    }
}

.category-item-active span {
    font-weight: 700;
}

.category-item-active .category-box {
    background-color: var(--prim-col);
    border-color: var(--prim-col);
    animation: category-item-active-box-in-anim 0.5s;
}

.category-item-disabled {
    opacity: 0.5;
    cursor: default;
    animation: category-item-disabled-in-anim 0.2s;
}

@keyframes category-item-active-box-in-anim {
    from {
        background-color: var(--fg-col);
        border-color: var(--fg-col);
    }

    to {
        background-color: var(--prim-col);
        border-color: var(--prim-col);
    }
}