* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

.changelog-card {
    background: white;
    border-radius: 12px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    max-width: 600px;
    width: 100%;
    padding: 40px;
}

.changelog-header {
    margin-bottom: 40px;
    text-align: center;
}

.changelog-header h1 {
    font-size: 2rem;
    color: #1a202c;
    margin-bottom: 8px;
}

.changelog-header p {
    font-size: 1rem;
    color: #718096;
}

.timeline {
    position: relative;
    padding: 20px 0;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 50%; 
    transform: translateX(-50%);
    top: 0;
    bottom: 0;
    width: 2px;
    background: #e2e8f0;
}

.timeline-item {
    display: flex;
    justify-content: center;
    align-items: center;
    margin-bottom: 30px;
    position: relative;
    width: 100%;
}

.timeline-dot {
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    width: 24px; 
    height: 24px;
    background: white;
    border: 3px solid #667eea;
    border-radius: 50%;
    z-index: 1; 
}

.timeline-dot::after {
    content: '';
    width: 10px;
    height: 10px;
    background: #667eea;
    border-radius: 50%;
}

.timeline-content {
    flex: 1; 
    padding-left: 40px; 
    text-align: left;
    font-size: 0.95rem;
    color: #2d3748;
    line-height: 1.5;
}

.timeline-date {
    flex: 1;
    text-align: right;
    padding-right: 40px;
    font-size: 0.875rem;
    color: #667eea;
    font-weight: 600;
}

.changelog-button {
    display: inline-block;
    width: 100%;
    margin-top: 20px;
    padding: 14px 24px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    text-align: center;
    border: none;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: transform 0.2s, box-shadow 0.2s;
    text-decoration: none;
}

.changelog-button:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 25px rgba(102, 126, 234, 0.4);
}

.changelog-button:active {
    transform: translateY(0);
}

@media (max-width: 600px) {
    /* Reset line to left side */
    .timeline::before {
        left: 20px;
        transform: none;
    }

    .timeline-item {
        flex-direction: column;
        align-items: flex-start;
        padding-left: 50px; /* Make room for the dot on the left */
        position: relative;
    }

    /* Move dot to left */
    .timeline-dot {
        left: 20px;
        transform: translateX(-50%);
        top: 0;
    }

    /* Stack date and content */
    .timeline-date {
        text-align: left;
        padding-right: 0;
        margin-bottom: 4px;
        width: 100%;
    }

    .timeline-content {
        padding-left: 0;
        width: 100%;
    }
}