body {
    background: aliceblue;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    margin: 0;
    padding: 10px;
    color: #333;
}

h2 {
    text-align: center;
    margin: 5px 0 10px 0;
    font-size: 1.3rem;
    color: #3F51B5;
}

/* Filter buttons container */
.filter-bar {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 6px;
    margin-bottom: 10px;
}

.filter-btn {
    padding: 5px 12px;
    border: 2px solid #ccc;
    border-radius: 16px;
    background: white;
    cursor: pointer;
    font-size: 0.8rem;
    font-weight: 600;
    transition: all 0.2s ease;
}

.filter-btn:hover {
    transform: scale(1.05);
}

.filter-btn.active {
    color: white;
}

.filter-btn[data-filter="all"] {
    border-color: #3F51B5;
    color: #3F51B5;
}
.filter-btn[data-filter="all"].active {
    background: #3F51B5;
    border-color: #3F51B5;
    color: white;
}

.filter-btn[data-filter="failed"] {
    border-color: #D32F2F;
    color: #D32F2F;
}
.filter-btn[data-filter="failed"].active {
    background: #D32F2F;
    border-color: #D32F2F;
    color: white;
}

.filter-btn[data-filter="disputed"] {
    border-color: #F57C00;
    color: #F57C00;
}
.filter-btn[data-filter="disputed"].active {
    background: #F57C00;
    border-color: #F57C00;
    color: white;
}

.filter-btn[data-filter="delayed"] {
    border-color: #FBC02D;
    color: #9E8600;
}
.filter-btn[data-filter="delayed"].active {
    background: #FBC02D;
    border-color: #FBC02D;
    color: #333;
}

.filter-btn[data-filter="pending"] {
    border-color: #9E9E9E;
    color: #616161;
}
.filter-btn[data-filter="pending"].active {
    background: #9E9E9E;
    border-color: #9E9E9E;
    color: white;
}

/* Source filter buttons */
.filter-btn[data-source="Academia"] {
    border-color: #7B1FA2;
    color: #7B1FA2;
}
.filter-btn[data-source="Academia"].active {
    background: #7B1FA2;
    border-color: #7B1FA2;
    color: white;
}

.filter-btn[data-source="Company"] {
    border-color: #1565C0;
    color: #1565C0;
}
.filter-btn[data-source="Company"].active {
    background: #1565C0;
    border-color: #1565C0;
    color: white;
}

.filter-btn[data-source="Consulting"] {
    border-color: #2E7D32;
    color: #2E7D32;
}
.filter-btn[data-source="Consulting"].active {
    background: #2E7D32;
    border-color: #2E7D32;
    color: white;
}

/* Timeline container */
#timeline {
    border: 1px solid #ddd;
    border-radius: 6px;
    background: white;
    margin-bottom: 10px;
}

/* Event details panel */
#event-details {
    background: white;
    border: 1px solid #ddd;
    border-radius: 6px;
    padding: 12px 16px;
    min-height: 60px;
    transition: all 0.3s ease;
}

#event-details.empty {
    color: #999;
    font-style: italic;
    text-align: center;
}

#event-details h3 {
    margin: 0 0 6px 0;
    font-size: 1rem;
}

#event-details .detail-label {
    font-weight: 600;
    color: #555;
    display: inline;
}

#event-details .detail-row {
    margin-bottom: 4px;
    font-size: 0.85rem;
    line-height: 1.4;
}

#event-details .category-badge {
    display: inline-block;
    padding: 2px 8px;
    border-radius: 10px;
    color: white;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    margin-left: 6px;
}

.category-failed { background: #D32F2F; }
.category-disputed { background: #F57C00; }
.category-delayed { background: #FBC02D; color: #333 !important; }
.category-pending { background: #9E9E9E; }

/* vis-timeline overrides */
.vis-item {
    border-radius: 4px;
    font-size: 0.75rem;
    font-weight: 500;
    cursor: pointer;
}

.vis-item.failed {
    background-color: #FFCDD2;
    border-color: #D32F2F;
    color: #B71C1C;
}

.vis-item.disputed {
    background-color: #FFE0B2;
    border-color: #F57C00;
    color: #E65100;
}

.vis-item.delayed {
    background-color: #FFF9C4;
    border-color: #FBC02D;
    color: #9E8600;
}

.vis-item.pending {
    background-color: #E0E0E0;
    border-color: #9E9E9E;
    color: #424242;
}

.vis-item.vis-selected {
    box-shadow: 0 0 0 2px #3F51B5;
}

/* Legend */
.legend {
    display: flex;
    justify-content: center;
    gap: 14px;
    margin-bottom: 8px;
    font-size: 0.75rem;
}

.legend-item {
    display: flex;
    align-items: center;
    gap: 4px;
}

.legend-dot {
    width: 12px;
    height: 12px;
    border-radius: 3px;
}

.legend-dot.failed { background: #D32F2F; }
.legend-dot.disputed { background: #F57C00; }
.legend-dot.delayed { background: #FBC02D; }
.legend-dot.pending { background: #9E9E9E; }