portfolio_leptos/src/components/timeline/TimelineElement.scss

.timeline-element {
    @apply relative flex flex-col md:flex-row justify-between;

    // Place point in center line
    &:before {
        @apply content-[""] w-6 h-6 rounded-[50%] absolute top-5 left-0 md:left-1/2 -ml-2 z-50;
        @apply bg-primary/10 dark:bg-dark_primary/10;
        @apply shadow-md shadow-primary/10 dark:shadow-dark_primary/10;
    }

    &:nth-child(even) {
        @apply md:flex-row-reverse;

        .timeline-element__category {
            @apply md:flex-row-reverse;
        }
    }

    .timeline-element__info, .timeline-element__category {
        @apply relative w-4/5 md:w-2/5 left-[10%] md:left-0;
        @apply text-on_surface dark:text-dark_on_surface;
    }

    .timeline-element__category {
        @apply top-5 flex md:justify-end mb-12;
    }

    .timeline-element__info {
        & > details {
            @apply mb-12 rounded-xl overflow-hidden relative;
            @apply bg-primary/10 dark:bg-dark_primary/10;
            @apply shadow-md shadow-primary/10 dark:shadow-dark_primary/10;

            & > summary, & > div {
                @apply p-5;
            }
    
            & > summary {
                @apply block select-none cursor-pointer outline-none p-5 font-semibold;
                
                // BEGIN TRANSITION
                @apply mb-0;
                transition: all 600ms cubic-bezier(0.2, 1, 0.3, 1);
                // END TRANSITION
    
                &:hover {
                    @apply bg-primary/20 dark:bg-dark_primary/20;
                }
            }
    
            &[open] {
                & > summary {
                    @apply mb-5; // TRANSITION
                }
            }
        }
    }
}