.timeline {
    position: relative;
    padding: 20px 0;
    margin: 0 auto;
    max-width: 1000px;
}

.timeline::before {
    content: '';
    position: absolute;
    top: 0;
    bottom: 0;
    width: 4px;
    background: #ddd;
    left: 50%;
    margin-left: -2px;
}

.timeline.horizontal {
    display: flex;
    overflow-x: auto;
    padding: 20px 0;
}

.timeline.horizontal::before {
    width: 100%;
    height: 4px;
    left: 0;
    top: 50%;
    margin-top: -2px;
}

.timeline-item {
    padding: 10px 40px;
    position: relative;
    background-color: inherit;
    width: 50%;
    opacity: 0;
    transform: translateY(50px);
    transition: all 0.5s ease-in-out;
}

.timeline-item.show {
    opacity: 1;
    transform: translateY(0);
}

.horizontal .timeline-item {
    padding: 20px 0;
    width: 300px;
    flex-shrink: 0;
    transform: translateX(50px);
}

.horizontal .timeline-item.show {
    transform: translateX(0);
}

.timeline-icon {
    position: absolute;
    width: 60px;
    height: 60px;
    right: -30px;
    background-color: white;
    border: 4px solid #8e44ad;
    top: 15px;
    border-radius: 50%;
    z-index: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    transition: all 0.3s ease;
}

.timeline-icon i {
    font-size: 24px;
    color: #8e44ad;
}

.timeline-icon img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.horizontal .timeline-icon {
    right: auto;
    left: 50%;
    margin-left: -30px;
    top: -30px;
}

.timeline-content {
    padding: 20px 30px;
    background-color: white;
    position: relative;
    border-radius: 6px;
    box-shadow: 0 1px 6px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
}

.timeline-item:nth-child(even) {
    left: 50%;
}

.timeline-item:nth-child(odd) .timeline-icon {
    left: -30px;
}

.horizontal .timeline-item:nth-child(even) {
    left: auto;
}

.timeline-content h2 {
    color: #8e44ad;
    margin-top: 0;
    position: relative;
    padding-left: 70px;
    transition: all 0.3s ease;
}

.timeline-content h2::before {
    content: attr(data-year);
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    background-color: #8e44ad;
    color: white;
    padding: 5px 10px;
    border-radius: 20px;
    font-size: 0.8em;
}

.timeline-item:hover .timeline-icon {
    transform: scale(1.1);
}

.timeline-item:hover .timeline-content {
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
}

.timeline-item:hover .timeline-content h2 {
    color: #6c3483;
}

@media screen and (max-width: 600px) {
    .timeline::before {
        left: 31px;
    }

    .timeline-item {
        width: 100%;
        padding-left: 70px;
        padding-right: 25px;
    }

    .timeline-item:nth-child(even) {
        left: 0;
    }

    .timeline-icon {
        left: 0;
        right: auto;
    }

    .horizontal {
        flex-direction: column;
    }

    .horizontal .timeline-item {
        width: 100%;
        padding: 70px 25px 25px 25px;
    }

    .horizontal .timeline-icon {
        left: 50%;
        top: 20px;
    }

    .horizontal::before {
        width: 4px;
        height: 100%;
        left: 50%;
        top: 0;
        margin-left: -2px;
    }

    .timeline-content h2 {
        padding-left: 0;
        margin-bottom: 10px;
    }

    .timeline-content h2::before {
        position: static;
        display: block;
        width: fit-content;
        margin-bottom: 10px;
    }
}