/* Interactive Taxonomy Legend and Filter - vis-network MicroSim
 * ============================================================
 * A force-directed concept graph on the left with a fixed 180px legend
 * panel on the right. The legend is a live taxonomy filter: clicking a row
 * fades that category's nodes and hides their edges. Under 600px the legend
 * stacks below the graph.
 *
 * The graph wrapper is position:relative so the title can overlay it as a
 * SIBLING of #network (vis-network erases the canvas innerHTML, so overlays
 * must never be children of #network). Total height is 520px, matching
 * CANVAS_HEIGHT in the JS.
 */

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

body {
    font-family: Arial, Helvetica, sans-serif;
    background-color: aliceblue;
}

/* ===========================================
   TWO-COLUMN LAYOUT (graph + legend)
   =========================================== */
.container {
    position: relative;
    display: flex;
    flex-direction: row;
    width: 100%;
    height: 520px;
}

.graph-wrap {
    position: relative;
    flex: 1 1 auto;
    height: 100%;
    min-width: 0;   /* allow the flex child to shrink below content width */
}

#network {
    width: 100%;
    height: 100%;
    background-color: aliceblue;
}

/* ===========================================
   TITLE (Top Center of the graph area)
   =========================================== */
.title {
    position: absolute;
    top: 8px;
    left: 50%;
    transform: translateX(-50%);
    font-size: 18px;
    font-weight: bold;
    color: black;
    background-color: rgba(240, 248, 255, 0.85);
    padding: 2px 12px;
    border-radius: 6px;
    white-space: nowrap;
    z-index: 10;
}

/* ===========================================
   LEGEND PANEL (fixed 180px on the right)
   =========================================== */
.legend-panel {
    flex: 0 0 180px;
    height: 100%;
    overflow-y: auto;
    background-color: #ffffff;
    border-left: 2px solid #cfd8e3;
    padding: 10px 10px;
}

.legend-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 4px;
}

.legend-heading {
    font-weight: bold;
    font-size: 15px;
    color: #1976d2;
}

.legend-hint {
    font-size: 10.5px;
    color: #666;
    line-height: 1.4;
    margin-bottom: 8px;
}

.legend-list {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

/* A single legend row acts as a checkbox-style toggle. */
.legend-row {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 5px 6px;
    border-radius: 6px;
    border: 1px solid #e3e9f0;
    background-color: #fafcff;
    cursor: pointer;
    transition: background-color 0.15s, opacity 0.15s;
    user-select: none;
}

.legend-row:hover {
    background-color: #f0f6ff;
}

/* Off state: the whole row dims. */
.legend-row.off {
    opacity: 0.5;
    background-color: #f4f4f4;
}

/* Checkbox-style box that shows a check when the category is visible. */
.legend-check {
    width: 15px;
    height: 15px;
    border-radius: 3px;
    border: 2px solid #789;
    background-color: #fff;
    flex-shrink: 0;
    position: relative;
}

.legend-row:not(.off) .legend-check::after {
    content: '';
    position: absolute;
    left: 3px;
    top: 0px;
    width: 4px;
    height: 8px;
    border: solid #2e7d32;
    border-width: 0 2px 2px 0;
    transform: rotate(45deg);
}

.legend-swatch {
    width: 15px;
    height: 15px;
    border-radius: 50%;   /* circular, matching the round nodes */
    flex-shrink: 0;
    border: 2px solid rgba(0, 0, 0, 0.25);
}

.legend-text {
    flex: 1;
    min-width: 0;
}

.legend-label {
    font-size: 11px;
    font-weight: bold;
    color: #222;
    line-height: 1.2;
    display: block;
}

.legend-row.off .legend-label {
    color: #888;
    font-weight: normal;
}

.legend-count {
    font-size: 10px;
    color: #555;
}

/* "Only" isolate button per row. */
.legend-only {
    flex-shrink: 0;
    font-size: 10px;
    font-weight: bold;
    color: #1976d2;
    background-color: #e8f1fb;
    border: 1px solid #bbdefb;
    border-radius: 4px;
    padding: 2px 5px;
    cursor: pointer;
    transition: background-color 0.15s;
}

.legend-only:hover {
    background-color: #d3e6fa;
}

/* ===========================================
   BUTTONS
   =========================================== */
.btn {
    font-weight: bold;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    transition: all 0.2s;
}

.btn-reset {
    background-color: #757575;
    color: white;
    font-size: 11px;
    padding: 5px 10px;
}

.btn-reset:hover {
    background-color: #616161;
}

/* ===========================================
   NATIVE VIS-NETWORK TOOLTIP (label + category)
   .vis-tooltip is the wrapper vis-network creates; we style the HTML we
   injected via each node's `title` element.
   =========================================== */
div.vis-tooltip {
    background-color: #ffffff !important;
    border: 2px solid #607d8b !important;
    border-radius: 6px !important;
    box-shadow: 0 3px 8px rgba(0, 0, 0, 0.25) !important;
    padding: 0 !important;
    font-family: Arial, Helvetica, sans-serif !important;
    white-space: normal !important;
}

.vn-tip {
    padding: 7px 10px;
}

.vn-tip-label {
    font-weight: bold;
    font-size: 13px;
    color: #263238;
    margin-bottom: 3px;
}

.vn-tip-cat {
    font-size: 11px;
    color: #546e7a;
}

/* ===========================================
   RESPONSIVE: stack legend below graph under 600px
   =========================================== */
@media (max-width: 600px) {
    .container {
        flex-direction: column;
        height: auto;
    }

    .graph-wrap {
        height: 420px;
        flex: 0 0 auto;
        width: 100%;
    }

    .legend-panel {
        flex: 0 0 auto;
        width: 100%;
        height: auto;
        border-left: none;
        border-top: 2px solid #cfd8e3;
    }

    /* Two-column legend grid so six rows do not scroll a tall column. */
    .legend-list {
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: 6px;
    }

    .title {
        font-size: 14px;
    }
}