.timeline {
    margin: clamp(4em, 3em + 4vw, 8em) 0 0;
}

.timeline__milestones {
    display: flex;
    flex-direction: column;
    position: relative;
    gap: clamp(2em, 2em + 5vw, 8em)
}

.timeline__milestone {
    position: relative;
    display: flex;
    flex-direction: column;
}

.timeline__media-wrapper,
.timeline__body,
.button__repeat-history {
    opacity: 0;
    transform: translate3d(0, 2em, 0);
    transition: transform .75s ease, opacity .75s ease
}

.timeline__milestone.visible .timeline__media-wrapper,
.timeline__milestone.visible .timeline__body,
.button__repeat-history.visible {
    opacity: 1;
    transform: none
}

.timeline__content {
    display: flex;
    flex-direction: column;
    max-width: 25em;
}

.timeline__year {
    color: var(--color-secondary);
    font-weight: 800;
    line-height: 1;
    font-size: clamp(2rem, 2rem + .5vw, 2.5rem);
    margin-bottom: .5em;
}

.timeline__title {
    font-size: clamp(1.5rem, 1rem + 1vw, 1.75rem);
    margin-bottom: clamp(.5em, .5em + .5vw, 1em);
}
.timeline__media {
    max-width: 25em;
    border: clamp(.5em, .5em + .5vw, .75em) solid white;
    box-shadow: 0 0 5px rgba(0, 0, 0, .25);
    margin-bottom: 2em;
}

.timeline__media img {
    width: 100%;
    height: auto;
}

.button__repeat-history {
    cursor: pointer;
    background-color: transparent;
    border: none;
    display: flex;
    align-items: center;
    margin: 0 auto;
    font-size: clamp(1.125rem, 1rem + .5vw, 1.25rem);
    font-weight: 700;
    margin-top: 5em;
}

.button__repeat-history svg {
    width: 1em;
    display: flex;
    margin-left: .5em;

}

@media only screen and (min-width: 25rem) {
    .timeline__milestones {
        padding: clamp(2em, 2em + 2vw, 5em) 0;
    }

    .timeline__milestones::after {
        content: "";
        position: absolute;
        left: .5em;
        top: 0;
        width: 2px;
        height: 100%;
        background-color: rgb(175, 175, 175);
    }

    .timeline__milestones::before {
        content: "";
        position: absolute;
        z-index: 2;
        left: .5em;
        top: 0;
        width: 2px;
        height: var(--progress-height);
        background-color: var(--color-secondary);
        transition: height .5s ease
    }

    .timeline__milestone {
        flex-direction: column-reverse;
        padding-left: clamp(2rem, 2rem + 5vw, 6rem);
    }

    .timeline__media {
        margin-bottom: 0;
        margin-top: 2em;
    }

    .timeline__milestone-dot {
        position: absolute;
        z-index: 3;
        left: calc(.25em - 1px);
        top: 1em;
        width: .75em;
        height: .75em;
        border-radius: 2px;
        background-color: white;
        border: 2px solid rgb(175, 175, 175);
        transition: border-color .35s ease, background-color .35s ease;
    }

    .timeline__milestone.current .timeline__milestone-dot {
        border-color: var(--color-secondary);
        background-color: var(--color-secondary);
    }

    .timeline__milestone.passed .timeline__milestone-dot {
        border-color: var(--color-secondary);
    }

    .button__repeat-history {
        margin-left: 0;
        margin-top: clamp(3em, 3em + 1vw, 4em);
    }
}

@media only screen and (min-width: 40rem) {

    .timeline__milestones::before,
    .timeline__milestones::after,
    .timeline__milestone::after {
        left: 50%
    }

    .timeline__milestone-dot {
        left: calc(50% - .25em - 1px)
    }

    .timeline__milestone {
        --timeline-gap: clamp(4em, 4em + 10vw, 15em);
        display: flex;
        flex-wrap: wrap;
        gap: var(--timeline-gap);
        padding-left: 0;
        flex-direction: row-reverse;
    }

    .timeline__milestone:nth-child(odd) {
        flex-direction: row;
    }

    .timeline__milestone:nth-child(odd) .timeline__media-wrapper,
    .timeline__milestone .timeline__body {
        display: flex;
        justify-content: end;
    }

    .timeline__milestone:nth-child(odd) .timeline__body {
        justify-content: start;
    }

    .timeline__media-wrapper,
    .timeline__body {
        display: flex;
        flex-basis: calc(50% - calc(var(--timeline-gap) / 2));
    }
    .timeline__media {
        margin-top: 0;
    }

    .timeline__content {
        margin-bottom: 0;
    }

    .button__repeat-history {
        margin-left: auto;
    }
}

@media (prefers-reduced-motion: reduce) {
  .timeline__milestones,
  .timeline__milestone-dot,
  .timeline__media-wrapper,
  .timeline__body,
  .button__repeat-history {
    transition: none !important;
  }

  .timeline__media-wrapper,
  .timeline__body,
  .button__repeat-history {
    transform: none !important;
  }
}