/* Version Timeline */
.timeline {
    position: relative;
    padding-left: 30px;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 7px;
    top: 0;
    bottom: 0;
    width: 2px;
    background-color: var(--color-border);
}

.timeline-item {
    position: relative;
    padding-bottom: var(--space-xl);
}

.timeline-item:last-child {
    padding-bottom: 0;
}

/* Timeline dot */
.timeline-item::before {
    content: '';
    position: absolute;
    left: -27px;
    top: 6px;
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background-color: var(--color-primary);
    border: 2px solid var(--color-surface);
    box-shadow: 0 0 0 2px var(--color-primary-light);
    z-index: 1;
}

.timeline-item.draft::before {
    background-color: var(--color-secondary);
    box-shadow: 0 0 0 2px var(--color-border);
}

.timeline-card {
    background-color: var(--color-surface);
    border-radius: var(--radius-lg);
    padding: var(--space-lg);
    box-shadow: var(--shadow-sm);
    transition: box-shadow var(--transition-base);
}

.timeline-card:hover {
    box-shadow: var(--shadow-md);
}

.timeline-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: var(--space-sm);
    margin-bottom: var(--space-md);
}

.timeline-version {
    font-size: var(--font-size-lg);
    font-weight: 700;
    color: var(--color-text);
}

.timeline-version a {
    color: inherit;
    transition: color var(--transition-fast);
}

.timeline-version a:hover {
    color: var(--color-primary);
}

.timeline-date {
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
}

.timeline-content {
    font-size: var(--font-size-sm);
    color: var(--color-text-light);
    line-height: 1.7;
}

.timeline-more {
    display: inline-block;
    margin-top: var(--space-md);
    font-size: var(--font-size-sm);
    color: var(--color-primary);
    font-weight: 500;
}

.timeline-more:hover {
    text-decoration: underline;
}

/* Responsive */
@media (min-width: 640px) {
    .timeline {
        padding-left: 40px;
    }

    .timeline-item::before {
        left: -37px;
        width: 14px;
        height: 14px;
    }

    .timeline::before {
        left: 8px;
    }
}