/* Linux Timeline - From Hobby to World Domination */
/* vis-timeline based interactive timeline */

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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: aliceblue;
    min-height: 100vh;
    padding: 20px;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
}

/* Header Styling */
h1 {
    text-align: center;
    color: #2c3e50;
    margin-bottom: 5px;
    font-size: 1.8rem;
}

.subtitle {
    text-align: center;
    color: #7f8c8d;
    margin-bottom: 20px;
    font-size: 1rem;
}

/* Category Filter Controls */
.filter-controls {
    text-align: center;
    margin-bottom: 8px;
}

.filter-controls span {
    margin-right: 10px;
    font-weight: bold;
    color: #2c3e50;
}

.filter-btn {
    padding: 4px 16px;
    margin: 1px;
    border: none;
    border-radius: 20px;
    cursor: pointer;
    font-size: 14px;
    transition: all 0.3s ease;
    color: white;
}

.filter-btn:hover {
    transform: scale(1.05);
    box-shadow: 0 2px 8px rgba(0,0,0,0.2);
}

.filter-btn.all { background: #34495e; }
.filter-btn.community { background: #27ae60; }
.filter-btn.technical { background: #3498db; }
.filter-btn.commercial { background: #e67e22; }
.filter-btn.modern { background: #9b59b6; }

/* Zoom Controls */
.zoom-controls {
    text-align: center;
    margin-bottom: 5px;
}

.zoom-btn {
    padding: 3px 12px;
    margin: 0 3px;
    border: 1px solid #bdc3c7;
    border-radius: 4px;
    background: white;
    cursor: pointer;
    font-size: 14px;
    font-weight: bold;
    color: #2c3e50;
    transition: all 0.2s ease;
}

.zoom-btn:hover {
    background: #ecf0f1;
    border-color: #3498db;
}

.zoom-btn:active {
    background: #3498db;
    color: white;
}

.zoom-btn.fit-btn {
    font-size: 12px;
    font-weight: normal;
}

/* =============================================================================
   EDGE CLIPPING PREVENTION - CSS Solutions (Part 3 of 3)
   =============================================================================
   Problem: vis-timeline clips event boxes when they extend beyond the visible
   date range. This happens because:
   1. The timeline container has overflow:hidden by default
   2. Internal vis-timeline panels clip content at their boundaries
   3. Event boxes near edges get cut off

   Solution: A three-part approach combining CSS container padding and
   overflow overrides with JavaScript window padding (see main.html).
   ============================================================================= */

/* Timeline Container */
#timeline {
    background: white;
    border-radius: 10px;
    box-shadow: 0 4px 15px rgba(0,0,0,0.1);
    margin-bottom: 20px;
    overflow: hidden;
    /* EDGE CLIPPING FIX: Add internal padding so event boxes near the edges
       have room to render without being clipped by the container boundary.
       This works together with the 2-year window padding in JavaScript. */
    padding-left: 80px;
    padding-right: 80px;
}

/* EDGE CLIPPING FIX: Override vis-timeline's default overflow:hidden behavior.
   By default, vis-timeline clips content that extends beyond its boundaries.
   These overrides allow event boxes to visually extend beyond the timeline's
   calculated edges while still being contained within our padded #timeline div. */
.vis-timeline {
    overflow: visible !important;
}

.vis-panel.vis-center {
    overflow: visible !important;
}

.vis-item .vis-item-overflow {
    overflow: visible !important;
}

/* Instructions */
.instructions {
    text-align: center;
    color: #7f8c8d;
    font-size: 0.85rem;
    margin-bottom: 15px;
    font-style: italic;
}

/* Info Panel */
.info-panel {
    display: grid;
    grid-template-columns: 200px 1fr;
    gap: 20px;
    background: white;
    border-radius: 10px;
    padding: 20px;
    box-shadow: 0 4px 15px rgba(0,0,0,0.1);
}

/* Legend */
.legend h3 {
    color: #2c3e50;
    margin-bottom: 15px;
    font-size: 1rem;
}

.legend-item {
    display: flex;
    align-items: center;
    margin-bottom: 8px;
}

.legend-color {
    width: 20px;
    height: 20px;
    border-radius: 4px;
    margin-right: 10px;
}

.legend-color.community { background: #27ae60; }
.legend-color.technical { background: #3498db; }
.legend-color.commercial { background: #e67e22; }
.legend-color.modern { background: #9b59b6; }

.legend-label {
    color: #2c3e50;
    font-size: 0.9rem;
}

/* Event Details Panel */
.event-details h3 {
    color: #2c3e50;
    margin-bottom: 15px;
    font-size: 1rem;
}

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

.event-details .event-title {
    font-size: 1.2rem;
    font-weight: bold;
    color: #2c3e50;
    margin-bottom: 8px;
}

.event-details .event-date {
    color: #7f8c8d;
    margin-bottom: 10px;
    font-size: 0.9rem;
}

.event-details .event-description {
    color: #34495e;
    line-height: 1.6;
    margin-bottom: 10px;
}

.event-details .event-context {
    background: #f8f9fa;
    padding: 10px;
    border-left: 3px solid #3498db;
    font-size: 0.9rem;
    color: #5d6d7e;
    font-style: italic;
}

/* vis-timeline Customization */
.vis-timeline {
    border: none !important;
}

.vis-item {
    border-radius: 4px !important;
    border: none !important;
    font-size: 12px !important;
}

.vis-item.vis-selected {
    box-shadow: 0 0 0 3px rgba(52, 152, 219, 0.5) !important;
}

.vis-item .vis-item-content {
    padding: 5px 10px !important;
    color: white !important;
    font-weight: 500 !important;
}

/* Tooltip Styling - Critical for text wrapping */
.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;
    border: none !important;
}

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

/* Timeline axis */
.vis-time-axis .vis-text {
    color: #2c3e50 !important;
    font-size: 12px !important;
}

.vis-time-axis .vis-grid.vis-minor {
    border-color: #ecf0f1 !important;
}

.vis-time-axis .vis-grid.vis-major {
    border-color: #bdc3c7 !important;
}

/* Responsive Design */
@media (max-width: 768px) {
    body {
        padding: 10px;
    }

    h1 {
        font-size: 1.4rem;
    }

    .info-panel {
        grid-template-columns: 1fr;
    }

    .filter-btn {
        padding: 6px 12px;
        font-size: 12px;
    }
}