.container {
    width: 100%;
    max-width: 1200px;
    margin: auto;
    padding: 0px;
    box-sizing: border-box;
    text-align: center;
}

h1 {
    text-align: center;
    padding: 20px;
    font-size: 24px;
}

.timeline {

    text-align: left;
    position: relative;
    max-width: 900px;
    margin: 0 auto;
    padding: 20px;
    box-sizing: border-box;
}

.timeline-item {
    position: relative;
    margin: 10px 0;
    padding: 20px;
    border-left: 2px solid #4CAF50;
    background: #fff;
    border-radius: 8px;
    box-shadow: 0 0 10px rgba(0,0,0,0.1);
}

.timeline-content {
    position: relative;
    padding: 20px;
    box-sizing: border-box;
}

.timeline-content h2 {
    margin-top: 0;
    color: #4CAF50;
    font-size: 18px;
}

.timeline-item:nth-child(odd) .timeline-content {
    background: #e0f7fa;
}

.timeline-item:nth-child(even) .timeline-content {
    background: #f1f8e9;
}

.timeline-item::before {
    content: '';
    position: absolute;
    left: -10px;
    top: 20px;
    height: 12px;
    width: 12px;
    background: #4CAF50;
    border-radius: 50%;
}

@media (max-width: 768px) {
    .timeline {
        padding: 10px;
    }

    .timeline-item {
        padding: 15px;
        border-left: 1px solid #4CAF50;
    }

    .timeline-content {
        padding-left: 15px;
    }

    .timeline-item::before {
        left: -5px;
        width: 10px;
        height: 10px;
    }
}

@media (max-width: 480px) {
    .container {
        width: 95%;
    }

    h1 {
        font-size: 20px;
    }

    .timeline-content h2 {
        font-size: 16px;
    }
}