html, body {
    margin: 0;
    padding: 0;
    font-family: Arial, sans-serif;
    background-color: #f4f4f4;
    color: #333;
}

.container {
    max-width: 800px;
    margin: 0 auto;
    padding: 40px 20px;
}

h1 {
    text-align: center;
    margin-bottom: 50px;
    color: #2c3e50;
    font-size: 2.5em;
}

.timeline {
    position: relative;
    padding-left: 50px;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 20px;
    top: 0;
    bottom: 0;
    width: 3px;
    background: #e74c3c;
}

.timeline-item {
    position: relative;
    margin-bottom: 40px;
    animation: fadeInUp 0.6s ease-out;
}

.timeline-dot {
    position: absolute;
    left: -37px;
    top: 5px;
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background: #e74c3c;
    border: 3px solid #f4f4f4;
    box-shadow: 0 0 0 3px #e74c3c;
    transition: transform 0.3s ease;
}

.timeline-item:hover .timeline-dot {
    transform: scale(1.3);
}

.timeline-content {
    background: white;
    padding: 20px;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.timeline-content:hover {
    transform: translateX(5px);
    box-shadow: 0 4px 20px rgba(0,0,0,0.15);
}

.timeline-content h3 {
    margin: 0 0 10px 0;
    color: #2c3e50;
    font-size: 1.4em;
}

.timeline-content .date {
    display: inline-block;
    color: #e74c3c;
    font-weight: bold;
    font-size: 0.9em;
    margin-bottom: 10px;
}

.timeline-content p {
    margin: 15px 0 0 0;
    line-height: 1.6;
    color: #555;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@media (max-width: 768px) {
    .container {
        padding: 20px 10px;
    }
    
    h1 {
        font-size: 2em;
    }
    
    .timeline {
        padding-left: 40px;
    }
    
    .timeline::before {
        left: 15px;
    }
    
    .timeline-dot {
        left: -32px;
        width: 12px;
        height: 12px;
    }
}