body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
    margin: 0px;
    padding: 0px;
    min-height: 100vh;
}

.container {
    max-width: 1400px;
    margin: 0 auto;
    background-color: aliceblue;
}

header {
    text-align: center;
    margin-bottom: 0px;
    padding: 0px;
    background: aliceblue;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);}

h1 {
    color: black;
    margin: 0 0 10px 0;
    font-size: 2em;
}

.subtitle {
    color: black;
    font-size: 1.1em;
    margin: 0;
}

.filter-controls {
    display: flex;
    justify-content: center;
    gap: 10px;
    flex-wrap: wrap;
    margin-bottom: 3px;
    padding: 3px;
    background: aliceblue;
    border-radius: 12px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

.filter-btn {
    padding: 10px 20px;
    border: none;
    border-radius: 25px;
    cursor: pointer;
    font-size: 14px;
    font-weight: 500;
    transition: all 0.3s ease;
    color: white;
}

.filter-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
}

.filter-btn.active {
    box-shadow: 0 0 0 3px rgba(0, 0, 0, 0.3);
}

.filter-btn.all {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

.filter-btn.classical {
    background: #3498db;
}

.filter-btn.applied {
    background: #27ae60;
}

.filter-btn.data {
    background: #f39c12;
}

#timeline {
    background: white;
    border-radius: 12px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    margin-bottom: 20px;
}

.info-panel {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: 20px;
}

@media (max-width: 768px) {
    .info-panel {
        grid-template-columns: 1fr;
    }
}

.legend {
    background: white;
    padding: 20px;
    border-radius: 12px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

.legend h3 {
    margin: 0 0 15px 0;
    color: #2c3e50;
    font-size: 1.1em;
}

.legend-item {
    display: flex;
    align-items: center;
    margin-bottom: 12px;
}

.legend-color {
    width: 20px;
    height: 20px;
    border-radius: 4px;
    margin-right: 12px;
}

.legend-text {
    font-size: 14px;
    color: #34495e;
}

.legend-period {
    font-size: 12px;
    color: #7f8c8d;
    margin-left: auto;
}

.event-details {
    background: white;
    padding: 20px;
    border-radius: 12px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

.event-details h3 {
    margin: 0 0 15px 0;
    color: #2c3e50;
    font-size: 1.1em;
}

.event-details .placeholder {
    color: #95a5a6;
    font-style: italic;
}

.event-title {
    font-size: 1.3em;
    font-weight: 600;
    color: #2c3e50;
    margin-bottom: 10px;
}

.event-date {
    font-size: 0.95em;
    color: #7f8c8d;
    margin-bottom: 10px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.event-category {
    display: inline-block;
    padding: 4px 12px;
    border-radius: 15px;
    font-size: 12px;
    color: white;
    font-weight: 500;
}

.event-description {
    color: #34495e;
    line-height: 1.6;
    margin-bottom: 15px;
}

.event-context {
    background: #f8f9fa;
    padding: 15px;
    border-radius: 8px;
    border-left: 4px solid #3498db;
}

.event-context-label {
    font-weight: 600;
    color: #2c3e50;
    margin-bottom: 5px;
    font-size: 0.9em;
}

.event-context-text {
    color: #5d6d7e;
    font-size: 0.9em;
    line-height: 1.5;
}

/* vis-timeline customizations */
.vis-item {
    border-radius: 4px;
    border: none;
    font-size: 12px;
    font-weight: 500;
}

.vis-item.vis-selected {
    box-shadow: 0 0 0 3px rgba(0, 0, 0, 0.3);
}

.vis-item .vis-item-content {
    padding: 5px 10px;
}

.vis-tooltip {
    background: #2c3e50 !important;
    color: white !important;
    padding: 10px 15px !important;
    border-radius: 8px !important;
    font-size: 13px !important;
    max-width: 300px !important;
    line-height: 1.4 !important;
    word-wrap: break-word !important;
    overflow-wrap: break-word !important;
    white-space: normal !important;
    box-sizing: border-box !important;
}

.vis-tooltip div {
    max-width: 280px !important;
    word-wrap: break-word !important;
    overflow-wrap: break-word !important;
    white-space: normal !important;
}

.instructions {
    text-align: center;
    color: #7f8c8d;
    font-size: 0.9em;
    margin-top: 15px;
}