/**
 * Advanced Components Styling
 * For "This Day in History" Interactive Data Visualization
 * 
 * Includes styling for:
 * - Enhanced event cards with collapsible sections
 * - Interactive timeline visualization
 * - Advanced search and filter components
 * - Sharing and export features
 * - Performance-optimized virtual scrolling
 * - Data visualization charts and panels
 * 
 * Author: Claude Code
 * Created: September 2025
 */

/* ===== ENHANCED EVENT CARDS ===== */
.event-card.enhanced {
    background: var(--card-background);
    border-radius: 16px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
    animation: slideInUp 0.6s ease-out forwards;
    opacity: 0;
    transform: translateY(20px);
}

.event-card.enhanced:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.15);
}

.event-card.enhanced:focus {
    outline: 3px solid var(--primary-color);
    outline-offset: 2px;
}

.event-card.enhanced.focused {
    animation: pulseHighlight 1s ease-in-out;
    box-shadow: 0 0 0 4px rgba(69, 183, 209, 0.3);
}

/* Category-specific styling */
.event-card.enhanced.events {
    border-left: 4px solid #FF6B6B;
}

.event-card.enhanced.births {
    border-left: 4px solid #4ECDC4;
}

.event-card.enhanced.deaths {
    border-left: 4px solid #95A5A6;
}

.event-card.enhanced.holidays {
    border-left: 4px solid #F1C40F;
}

.event-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 20px 8px;
    border-bottom: 1px solid var(--border-color);
}

.event-category-icon {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    color: white;
}

.event-category-icon.events {
    background: linear-gradient(135deg, #FF6B6B, #FF8E8E);
}

.event-category-icon.births {
    background: linear-gradient(135deg, #4ECDC4, #6DD5DB);
}

.event-category-icon.deaths {
    background: linear-gradient(135deg, #95A5A6, #B2BABB);
}

.event-category-icon.holidays {
    background: linear-gradient(135deg, #F1C40F, #F4D03F);
}

.event-importance {
    font-size: 18px;
    filter: drop-shadow(0 1px 2px rgba(0, 0, 0, 0.1));
}

.event-year {
    font-weight: 600;
    font-size: 14px;
    color: var(--text-secondary);
    background: var(--surface-color);
    padding: 4px 12px;
    border-radius: 20px;
}

.bookmark-btn {
    background: none;
    border: none;
    color: var(--text-secondary);
    font-size: 18px;
    cursor: pointer;
    padding: 8px;
    border-radius: 50%;
    transition: all 0.2s ease;
}

.bookmark-btn:hover {
    background: var(--hover-color);
    color: var(--primary-color);
}

.bookmark-btn.bookmarked {
    color: #F1C40F;
}

.event-content {
    padding: 16px 20px;
}

.event-title {
    font-size: 18px;
    font-weight: 600;
    margin: 0 0 12px;
    line-height: 1.4;
    color: var(--text-primary);
}

.event-description {
    font-size: 14px;
    line-height: 1.6;
    color: var(--text-secondary);
    margin: 0 0 16px;
    max-height: 60px;
    overflow: hidden;
    transition: max-height 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.event-description.expanded {
    max-height: none;
}

.expand-btn {
    background: none;
    border: none;
    color: var(--primary-color);
    font-size: 14px;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 8px;
    margin: 8px 0 16px;
    padding: 4px;
    transition: all 0.2s ease;
}

.expand-btn:hover {
    color: var(--primary-dark);
}

.expand-btn i {
    transition: transform 0.3s ease;
}

.event-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    margin: 16px 0;
    font-size: 12px;
}

.event-category-label {
    display: flex;
    align-items: center;
    gap: 6px;
    color: var(--text-secondary);
    background: var(--surface-color);
    padding: 4px 10px;
    border-radius: 12px;
}

.event-source {
    color: var(--text-muted);
    font-style: italic;
}

.confidence-score {
    color: var(--success-color);
    font-weight: 500;
}

.event-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    margin: 12px 0;
}

.event-tag {
    background: var(--primary-light);
    color: var(--primary-color);
    padding: 4px 8px;
    border-radius: 8px;
    font-size: 11px;
    font-weight: 500;
}

.event-images {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(80px, 1fr));
    gap: 8px;
    margin: 12px 0;
}

.event-image {
    position: relative;
    border-radius: 8px;
    overflow: hidden;
    cursor: pointer;
    aspect-ratio: 1;
}

.event-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.3s ease;
}

.event-image:hover img {
    transform: scale(1.1);
}

.event-image.expanded {
    grid-column: 1 / -1;
    aspect-ratio: 16 / 9;
}

.event-actions {
    padding: 12px 20px;
    border-top: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    gap: 8px;
    position: relative;
}

.action-btn {
    background: none;
    border: none;
    color: var(--text-secondary);
    font-size: 16px;
    cursor: pointer;
    padding: 8px;
    border-radius: 8px;
    transition: all 0.2s ease;
}

.action-btn:hover {
    background: var(--hover-color);
    color: var(--primary-color);
}

.action-tooltip {
    position: absolute;
    bottom: 100%;
    left: 50%;
    transform: translateX(-50%) translateY(-8px);
    background: var(--dark-color);
    color: white;
    padding: 6px 12px;
    border-radius: 6px;
    font-size: 12px;
    white-space: nowrap;
    opacity: 0;
    pointer-events: none;
    transition: all 0.2s ease;
    z-index: 1000;
}

.action-tooltip.show {
    opacity: 1;
    transform: translateX(-50%) translateY(-4px);
}

.action-tooltip.success {
    background: var(--success-color);
}

.action-tooltip::after {
    content: '';
    position: absolute;
    top: 100%;
    left: 50%;
    transform: translateX(-50%);
    border: 4px solid transparent;
    border-top-color: var(--dark-color);
}

.action-tooltip.success::after {
    border-top-color: var(--success-color);
}

/* Related events highlighting */
.event-card.related-highlight {
    box-shadow: 0 0 0 2px rgba(69, 183, 209, 0.3);
}

/* ===== ADVANCED SEARCH SYSTEM ===== */
.advanced-search {
    background: var(--card-background);
    border-radius: 12px;
    padding: 20px;
    margin: 20px 0;
    box-shadow: 0 2px 12px rgba(0, 0, 0, 0.08);
}

.search-input-container {
    position: relative;
    margin-bottom: 16px;
}

.search-input {
    width: 100%;
    padding: 12px 16px 12px 48px;
    border: 2px solid var(--border-color);
    border-radius: 8px;
    font-size: 16px;
    background: var(--surface-color);
    transition: all 0.3s ease;
}

.search-input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(69, 183, 209, 0.1);
}

.search-input::placeholder {
    color: var(--text-muted);
}

.search-input-container::before {
    content: '\f002';
    font-family: 'Font Awesome 6 Free';
    font-weight: 900;
    position: absolute;
    left: 16px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-muted);
    pointer-events: none;
}

.search-clear {
    position: absolute;
    right: 8px;
    top: 50%;
    transform: translateY(-50%);
    background: none;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    padding: 8px;
    border-radius: 4px;
    opacity: 0;
    transition: all 0.2s ease;
}

.search-input:not(:placeholder-shown) + .search-clear {
    opacity: 1;
}

.search-clear:hover {
    background: var(--hover-color);
    color: var(--text-primary);
}

.search-suggestions {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--card-background);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
    z-index: 1000;
    max-height: 200px;
    overflow-y: auto;
    display: none;
}

.search-filters {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
    margin-bottom: 16px;
}

.filter-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.filter-label {
    font-weight: 600;
    font-size: 14px;
    color: var(--text-primary);
}

.importance-filters {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

.importance-btn {
    background: var(--surface-color);
    border: 2px solid var(--border-color);
    color: var(--text-secondary);
    padding: 6px 12px;
    border-radius: 20px;
    font-size: 12px;
    cursor: pointer;
    transition: all 0.2s ease;
}

.importance-btn:hover {
    background: var(--hover-color);
}

.importance-btn.active {
    background: var(--primary-color);
    border-color: var(--primary-color);
    color: white;
}

.period-filter {
    padding: 8px 12px;
    border: 2px solid var(--border-color);
    border-radius: 8px;
    background: var(--surface-color);
    color: var(--text-primary);
    font-size: 14px;
    cursor: pointer;
}

.period-filter:focus {
    outline: none;
    border-color: var(--primary-color);
}

.search-results-info {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 16px;
    border-top: 1px solid var(--border-color);
    font-size: 14px;
}

.results-count {
    color: var(--text-secondary);
    font-weight: 500;
}

.search-actions {
    display: flex;
    gap: 8px;
}

.search-action {
    background: none;
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    padding: 4px 12px;
    border-radius: 6px;
    font-size: 12px;
    cursor: pointer;
    transition: all 0.2s ease;
}

.search-action:hover {
    background: var(--hover-color);
    color: var(--text-primary);
}

/* ===== SORTING CONTROLS ===== */
.sort-controls {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-top: 16px;
    padding-top: 16px;
    border-top: 1px solid var(--border-color);
}

.sort-label {
    font-size: 14px;
    font-weight: 600;
    color: var(--text-primary);
}

.sort-select {
    padding: 6px 12px;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    background: var(--surface-color);
    color: var(--text-primary);
    font-size: 14px;
    cursor: pointer;
}

.sort-direction {
    background: none;
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    padding: 6px 8px;
    border-radius: 6px;
    cursor: pointer;
    transition: all 0.2s ease;
}

.sort-direction:hover {
    background: var(--hover-color);
}

/* ===== TIMELINE VISUALIZATION ===== */
.timeline-visualization {
    background: var(--card-background);
    border-radius: 12px;
    padding: 20px;
    box-shadow: 0 2px 12px rgba(0, 0, 0, 0.08);
}

.timeline-controls {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
    padding-bottom: 16px;
    border-bottom: 1px solid var(--border-color);
}

.timeline-zoom {
    display: flex;
    gap: 4px;
}

.zoom-btn {
    background: var(--surface-color);
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    padding: 6px 12px;
    border-radius: 6px;
    font-size: 12px;
    cursor: pointer;
    transition: all 0.2s ease;
}

.zoom-btn:hover {
    background: var(--hover-color);
}

.zoom-btn.active {
    background: var(--primary-color);
    border-color: var(--primary-color);
    color: white;
}

.timeline-navigation {
    display: flex;
    align-items: center;
    gap: 12px;
}

.nav-btn {
    background: none;
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    padding: 8px;
    border-radius: 6px;
    cursor: pointer;
    transition: all 0.2s ease;
}

.nav-btn:hover {
    background: var(--hover-color);
    color: var(--text-primary);
}

.timeline-position {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
}

.current-period {
    font-size: 14px;
    font-weight: 600;
    color: var(--text-primary);
}

.timeline-scrubber {
    position: relative;
    width: 200px;
}

.scrubber-input {
    width: 100%;
    height: 4px;
    background: var(--border-color);
    border-radius: 2px;
    outline: none;
    cursor: pointer;
    -webkit-appearance: none;
}

.scrubber-input::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 16px;
    height: 16px;
    background: var(--primary-color);
    border-radius: 50%;
    cursor: pointer;
}

.scrubber-input::-moz-range-thumb {
    width: 16px;
    height: 16px;
    background: var(--primary-color);
    border-radius: 50%;
    border: none;
    cursor: pointer;
}

.timeline-content {
    position: relative;
    min-height: 400px;
}

.timeline-axis {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--border-color);
}

.axis-marker {
    position: absolute;
    top: -8px;
    transform: translateX(-50%);
}

.axis-marker::before {
    content: '';
    position: absolute;
    top: 8px;
    left: 50%;
    transform: translateX(-50%);
    width: 2px;
    height: 16px;
    background: var(--border-color);
}

.axis-label {
    position: absolute;
    top: 26px;
    left: 50%;
    transform: translateX(-50%);
    font-size: 12px;
    color: var(--text-muted);
    white-space: nowrap;
}

.timeline-events {
    padding-top: 40px;
}

.timeline-period {
    margin-bottom: 32px;
}

.period-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 16px;
}

.period-title {
    font-size: 18px;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0;
}

.period-count {
    font-size: 12px;
    color: var(--text-muted);
    background: var(--surface-color);
    padding: 4px 8px;
    border-radius: 12px;
}

.events-track {
    display: flex;
    flex-wrap: wrap;
    gap: 16px;
    align-items: flex-start;
}

.timeline-event-marker {
    position: relative;
    cursor: pointer;
    animation: fadeInScale 0.6s ease-out forwards;
    opacity: 0;
    transform: scale(0.8);
}

.timeline-event-marker:hover .marker-icon {
    transform: scale(1.2);
}

.marker-icon {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 16px;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
}

.timeline-event-marker.events .marker-icon {
    background: linear-gradient(135deg, #FF6B6B, #FF8E8E);
}

.timeline-event-marker.births .marker-icon {
    background: linear-gradient(135deg, #4ECDC4, #6DD5DB);
}

.timeline-event-marker.deaths .marker-icon {
    background: linear-gradient(135deg, #95A5A6, #B2BABB);
}

.timeline-event-marker.holidays .marker-icon {
    background: linear-gradient(135deg, #F1C40F, #F4D03F);
}

.timeline-event-marker[data-importance="major"] .marker-icon {
    box-shadow: 0 0 20px rgba(255, 215, 0, 0.5);
}

.marker-line {
    position: absolute;
    top: 100%;
    left: 50%;
    transform: translateX(-50%);
    width: 2px;
    height: 20px;
    background: var(--border-color);
}

.timeline-tooltip {
    position: absolute;
    background: var(--dark-color);
    color: white;
    padding: 12px;
    border-radius: 8px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
    max-width: 300px;
    z-index: 1001;
    pointer-events: none;
    opacity: 0;
    transform: translateY(10px);
    transition: all 0.3s ease;
}

.timeline-tooltip.show {
    opacity: 1;
    transform: translateY(0);
}

.tooltip-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 8px;
}

.tooltip-header strong {
    color: #FFD700;
}

.tooltip-category {
    font-size: 12px;
    background: rgba(255, 255, 255, 0.2);
    padding: 2px 8px;
    border-radius: 4px;
}

.tooltip-title {
    font-weight: 500;
    margin-bottom: 4px;
}

.tooltip-importance {
    font-size: 14px;
}

/* ===== SHARE MODAL ===== */
.share-modal {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 2000;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
}

.share-modal.show {
    opacity: 1;
    visibility: visible;
}

.modal-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(4px);
}

.modal-content {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background: var(--card-background);
    border-radius: 12px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    width: 90%;
    max-width: 500px;
    max-height: 90vh;
    overflow: hidden;
}

.modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 20px;
    border-bottom: 1px solid var(--border-color);
}

.modal-header h3 {
    margin: 0;
    font-size: 20px;
    color: var(--text-primary);
}

.modal-close {
    background: none;
    border: none;
    color: var(--text-secondary);
    font-size: 18px;
    cursor: pointer;
    padding: 8px;
    border-radius: 50%;
    transition: all 0.2s ease;
}

.modal-close:hover {
    background: var(--hover-color);
    color: var(--text-primary);
}

.modal-body {
    padding: 20px;
}

.share-preview {
    background: var(--surface-color);
    padding: 16px;
    border-radius: 8px;
    margin-bottom: 20px;
}

.share-preview h4 {
    margin: 0 0 8px;
    font-size: 16px;
    color: var(--text-primary);
}

.share-preview p {
    margin: 0;
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.5;
}

.share-options {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
}

.share-option {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 16px;
    background: var(--surface-color);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.2s ease;
    text-align: left;
}

.share-option:hover {
    background: var(--hover-color);
    border-color: var(--primary-color);
}

.share-option i {
    font-size: 18px;
    width: 20px;
    text-align: center;
}

/* ===== DATA VISUALIZATION PANEL ===== */
.data-visualization-panel {
    background: var(--card-background);
    border-radius: 12px;
    padding: 24px;
    box-shadow: 0 2px 12px rgba(0, 0, 0, 0.08);
}

.viz-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 24px;
    padding-bottom: 16px;
    border-bottom: 1px solid var(--border-color);
}

.viz-header h3 {
    margin: 0;
    font-size: 20px;
    color: var(--text-primary);
}

.viz-controls {
    display: flex;
    gap: 4px;
}

.viz-btn {
    background: var(--surface-color);
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    padding: 8px 16px;
    border-radius: 6px;
    font-size: 14px;
    cursor: pointer;
    transition: all 0.2s ease;
}

.viz-btn:hover {
    background: var(--hover-color);
}

.viz-btn.active {
    background: var(--primary-color);
    border-color: var(--primary-color);
    color: white;
}

.viz-content {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 24px;
    align-items: start;
}

.viz-chart {
    position: relative;
    min-height: 300px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.category-pie-chart {
    width: 200px;
    height: 200px;
    border-radius: 50%;
    position: relative;
    background: conic-gradient(from 0deg, transparent 0deg, transparent 360deg);
}

.pie-slice {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    border-radius: 50%;
    cursor: pointer;
    transition: all 0.3s ease;
}

.pie-slice:hover {
    transform: scale(1.05);
}

.chart-legend {
    display: flex;
    flex-direction: column;
    gap: 12px;
    margin-top: 20px;
}

.legend-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 8px;
    border-radius: 6px;
    transition: background 0.2s ease;
}

.legend-item:hover {
    background: var(--hover-color);
}

.legend-color {
    width: 16px;
    height: 16px;
    border-radius: 50%;
}

.legend-label {
    flex: 1;
    font-size: 14px;
    color: var(--text-primary);
}

.legend-value {
    font-size: 14px;
    font-weight: 600;
    color: var(--text-secondary);
}

.viz-stats {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.stat-item {
    background: var(--surface-color);
    padding: 16px;
    border-radius: 8px;
    text-align: center;
}

.stat-value {
    display: block;
    font-size: 24px;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 4px;
}

.stat-label {
    font-size: 12px;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

/* ===== VIRTUAL SCROLLING ===== */
.virtual-scroll-container {
    position: relative;
    height: 600px;
    overflow-y: auto;
}

.virtual-scroll-spacer {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    pointer-events: none;
}

.virtual-scroll-viewport {
    position: relative;
    z-index: 1;
}

/* ===== ANIMATIONS ===== */
@keyframes slideInUp {
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeInScale {
    to {
        opacity: 1;
        transform: scale(1);
    }
}

@keyframes pulseHighlight {
    0%, 100% {
        box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
    }
    50% {
        box-shadow: 0 0 0 8px rgba(69, 183, 209, 0.2), 0 4px 20px rgba(0, 0, 0, 0.1);
    }
}

/* ===== RESPONSIVE DESIGN ===== */
@media (max-width: 768px) {
    .search-filters {
        grid-template-columns: 1fr;
        gap: 16px;
    }
    
    .importance-filters {
        justify-content: center;
    }
    
    .timeline-controls {
        flex-direction: column;
        gap: 16px;
        align-items: stretch;
    }
    
    .timeline-navigation {
        justify-content: center;
    }
    
    .timeline-scrubber {
        width: 100%;
        max-width: 300px;
    }
    
    .events-track {
        justify-content: center;
    }
    
    .viz-content {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    
    .viz-stats {
        flex-direction: row;
        justify-content: space-around;
    }
    
    .share-options {
        grid-template-columns: 1fr;
    }
    
    .sort-controls {
        flex-direction: column;
        align-items: stretch;
        gap: 8px;
    }
    
    .event-header {
        flex-direction: column;
        gap: 12px;
        text-align: center;
    }
    
    .event-actions {
        justify-content: center;
    }
}

@media (max-width: 480px) {
    .advanced-search {
        padding: 16px;
    }
    
    .timeline-visualization {
        padding: 16px;
    }
    
    .data-visualization-panel {
        padding: 16px;
    }
    
    .viz-controls {
        flex-direction: column;
        width: 100%;
    }
    
    .viz-btn {
        text-align: center;
    }
    
    .timeline-zoom {
        flex-wrap: wrap;
        justify-content: center;
    }
    
    .category-pie-chart {
        width: 150px;
        height: 150px;
    }
}

/* ===== ACCESSIBILITY ===== */
@media (prefers-reduced-motion: reduce) {
    .event-card.enhanced {
        animation: none;
        opacity: 1;
        transform: none;
    }
    
    .timeline-event-marker {
        animation: none;
        opacity: 1;
        transform: none;
    }
    
    .expand-btn i {
        transition: none;
    }
    
    .marker-icon {
        transition: none;
    }
}

/* ===== HIGH CONTRAST MODE ===== */
@media (prefers-contrast: high) {
    .event-card.enhanced {
        border: 2px solid var(--text-primary);
    }
    
    .timeline-event-marker {
        border: 2px solid var(--text-primary);
        border-radius: 50%;
    }
    
    .action-btn:focus,
    .bookmark-btn:focus,
    .expand-btn:focus {
        outline: 3px solid var(--text-primary);
        outline-offset: 2px;
    }
}

/* ===== PRINT STYLES ===== */
@media print {
    .event-actions,
    .advanced-search,
    .timeline-controls,
    .viz-controls {
        display: none !important;
    }
    
    .event-card.enhanced {
        box-shadow: none;
        border: 1px solid #000;
        page-break-inside: avoid;
    }
    
    .timeline-visualization {
        box-shadow: none;
        border: 1px solid #000;
    }
    
    .share-modal {
        display: none !important;
    }
}