.timeline {
    position: relative;
    margin: 2rem auto;
    padding: 2rem 0;
    width: 90%;
    max-width: 600px;
    border-left: 3px solid rgba(0, 0, 0, 0.1);
}

.timeline-item {
    position: relative;
    padding-left: 2rem;
    margin-bottom: 2.5rem;
}

.timeline-dot {
    position: absolute;
    left: -10px;
    top: 5px;
    width: 16px;
    height: 16px;
    background-color: #333;
    border-radius: 50%;
    border: 3px solid #fff;
    box-shadow: 0 0 0 2px #333;
}

.timeline-content h3 {
    margin: 0;
    font-size: 1.3rem;
    font-weight: 700;
}

.timeline-content h4 {
    margin: 0.3rem 0;
    font-size: 1.1rem;
    font-weight: 500;
    color: #444;
}

.timeline-content ul {
    margin: 0.5rem 0;
    padding-left: 1.5rem;
    font-size: 0.95rem;
    color: #555;
}

.timeline-content p {
    margin: 0.3rem 0;
    font-size: 0.95rem;
    color: #555;
}

.timeline-date {
    display: inline-block;
    margin-top: 0.5rem;
    font-weight: 600;
    color: #666;
    font-size: 0.9rem;
}