/* Learning Graph Viewer Styles */

/* ================================
   RESET AND BASE STYLES
   ================================ */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
    background-color: #f5f5f5;
    overflow: hidden;
}

/* ================================
   MAIN LAYOUT CONTAINER
   Uses flexbox for sidebar + graph layout
   ================================ */
.container {
    display: flex;
    height: 100vh;
    width: 100vw;
}

/* ================================
   SIDEBAR STYLES
   Collapsible sidebar with search, legend, and stats
   ================================ */
.sidebar {
    /* Width settings - adjust for label wrapping */
    width: 280px;
    min-width: 280px;
    /* Visual styling */
    background-color: #fff;
    border-right: 1px solid #ddd;
    /* Flexbox for internal layout */
    display: flex;
    flex-direction: column;
    /* Smooth collapse animation */
    transition: width 0.3s ease, min-width 0.3s ease;
    overflow: hidden;
}

/* Collapsed state - narrow width shows only toggle button */
.sidebar.collapsed {
    width: 50px;
    min-width: 50px;
}

/* ================================
   SIDEBAR HEADER
   Contains title and toggle button
   ================================ */
.sidebar-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px;
    background-color: #2196F3;    /* Blue header bar */
    color: white;
}

.sidebar-header h4 {
    font-size: 14px;
    font-weight: 600;
    margin: 0;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;      /* Truncate long titles */
}

/* Hide title when collapsed */
.sidebar.collapsed .sidebar-header h4 {
    display: none;
}

/* ================================
   TOGGLE BUTTON
   Hamburger menu icon for collapse/expand
   ================================ */
.toggle-btn {
    background: none;
    border: none;
    color: white;
    font-size: 20px;
    cursor: pointer;
    padding: 5px;
    border-radius: 4px;
}

.toggle-btn:hover {
    background-color: rgba(255,255,255,0.2);
}

/* ================================
   SIDEBAR CONTENT
   Scrollable area containing search, legend, stats
   ================================ */
.sidebar-content {
    flex: 1;
    overflow-y: auto;
    padding: 15px;
}

/* ================================
   SEARCH CONTAINER STYLES
   Type-ahead search for finding concepts
   ================================ */
.search-container {
    margin-bottom: 20px;
    position: relative;
}

.search-container label {
    display: block;
    font-weight: 600;
    margin-bottom: 8px;
    color: #333;
}

.search-container input {
    width: 100%;
    padding: 10px 12px;
    border: 1px solid #ddd;
    border-radius: 6px;
    font-size: 14px;
    transition: border-color 0.2s;
}

.search-container input:focus {
    outline: none;
    border-color: #2196F3;
    box-shadow: 0 0 0 3px rgba(33, 150, 243, 0.1);  /* Blue focus ring */
}

/* ================================
   SEARCH RESULTS DROPDOWN
   Positioned absolutely below search input
   ================================ */
.search-results {
    display: none;                    /* Hidden by default */
    position: absolute;
    width: calc(100% - 30px);         /* Account for sidebar padding */
    background: white;
    border: 1px solid #ddd;
    border-radius: 6px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.15);
    max-height: 300px;
    overflow-y: auto;
    z-index: 100;                     /* Above other content */
    margin-top: 4px;
}

.search-result-item {
    padding: 10px 12px;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid #eee;
}

.search-result-item:last-child {
    border-bottom: none;
}

.search-result-item:hover {
    background-color: #f5f5f5;
}

.result-label {
    font-weight: 500;
    color: #333;
    font-size: 13px;
}

/* Category badge in search results */
.result-category {
    font-size: 11px;
    padding: 3px 8px;
    border-radius: 12px;
    color: #333;
}

/* ================================
   LEGEND CONTAINER STYLES
   Category filtering with checkboxes
   ================================ */
.legend-container {
    margin-bottom: 20px;
}

.legend-container h5 {
    font-weight: 600;
    margin-bottom: 10px;
    color: #333;
}

/* Check All / Uncheck All buttons */
.legend-controls {
    display: flex;
    gap: 8px;
    margin-bottom: 12px;
}

.legend-btn {
    flex: 1;
    padding: 6px 10px;
    font-size: 12px;
    border: 1px solid #ddd;
    background: #fff;
    border-radius: 4px;
    cursor: pointer;
    transition: all 0.2s;
}

.legend-btn:hover {
    background: #f0f0f0;
    border-color: #bbb;
}

/* Legend items container - scrollable for many categories */
#legend {
    max-height: 400px;
    overflow-y: auto;
}

/* Individual legend item (checkbox + color + label) */
.legend-item {
    display: flex;
    align-items: center;
    padding: 6px 0;
    gap: 8px;
}

.legend-item input[type="checkbox"] {
    width: 16px;
    height: 16px;
    cursor: pointer;
}

/* Color swatch box */
.color-box {
    width: 20px;
    height: 20px;
    border-radius: 4px;
    border: 1px solid rgba(0,0,0,0.1);
    flex-shrink: 0;                   /* Don't shrink color box */
}

.legend-item label {
    font-size: 13px;
    color: #555;
    cursor: pointer;
    flex: 1;
    line-height: 1.3;
}

/* ================================
   STATISTICS CONTAINER STYLES
   Shows counts of visible nodes, edges, foundational
   ================================ */
.stats-container {
    background-color: #f9f9f9;
    padding: 12px;
    border-radius: 6px;
}

.stats-container h5 {
    font-weight: 600;
    margin-bottom: 10px;
    color: #333;
}

#stats p {
    font-size: 13px;
    color: #666;
    margin-bottom: 6px;
}

#stats span {
    font-weight: 600;
    color: #2196F3;                   /* Blue accent for numbers */
}

/* ================================
   GRAPH CONTAINER STYLES
   Main visualization area
   ================================ */
.graph-container {
    flex: 1;                          /* Take remaining space */
    position: relative;
    background-color: aliceblue;      /* Light blue background */
}

#network {
    width: 100%;
    height: 100%;
}

/* ================================
   RESPONSIVE ADJUSTMENTS
   Mobile-friendly sidebar widths
   ================================ */
@media (max-width: 768px) {
    .sidebar {
        width: 250px;
        min-width: 250px;
    }

    .sidebar.collapsed {
        width: 40px;
        min-width: 40px;
    }
}