/* Personal Knowledge Graph Query Explorer - vis-network-tutorial layout
 * =====================================================================
 * Wide (>= 1000px): graph on the left, exercise panel on the right.
 * Narrower: title, graph, legend, and exercise stacked.
 * The whole page always fits inside the iframe height (CANVAS_HEIGHT + 2);
 * the graph area absorbs any spare height so nothing scrolls.
 *
 * Colors are from the Okabe-Ito color-blind-safe palette. Every state also
 * carries a glyph (check, X, star) or a line style, never color alone, and
 * every node states its entity type in words.
 */

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

html, body {
    height: 100%;
    overflow: hidden;
}

body {
    font-family: Arial, Helvetica, sans-serif;
    background-color: aliceblue;
    color: #1a1a1a;
    font-size: 16px;
}

.container {
    display: flex;
    flex-direction: column;
    width: 100%;
    height: 100vh;
    padding: 6px 10px 4px 10px;
    gap: 6px;
}

/* ===========================================
   TITLE (Top Center)
   =========================================== */
.title-bar {
    text-align: center;
    flex: 0 0 auto;
}

.title {
    font-size: 20px;
    font-weight: bold;
}

.subtitle {
    font-size: 16px;
    color: #333;
    margin-top: 2px;
    font-style: italic;
}

/* ===========================================
   LAYOUT: stacked by default, two columns when wide
   =========================================== */
.layout {
    flex: 1 1 auto;
    min-height: 0;
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.left-col {
    flex: 1 1 auto;
    min-width: 0;
    min-height: 0;
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.graph-wrap {
    position: relative;
    flex: 1 1 auto;
    min-height: 200px;
    background-color: white;
    border: 1px solid #c9d6e3;
    border-radius: 8px;
    overflow: hidden;
}

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

.illustrative {
    position: absolute;
    right: 8px;
    bottom: 4px;
    font-size: 13px;
    font-style: italic;
    color: #555;
    background-color: rgba(255, 255, 255, 0.85);
    padding: 1px 4px;
    border-radius: 4px;
    pointer-events: none;
}

/* Hover information: shown over the half of the graph away from the pointer */
.hover-info {
    position: absolute;
    left: 6px;
    right: 6px;
    font-size: 15px;
    line-height: 1.35;
    background-color: rgba(255, 255, 255, 0.96);
    border: 2px solid #0072b2;
    border-radius: 6px;
    padding: 4px 8px;
    pointer-events: none;
    display: none;
    z-index: 10;
}
.hover-info.at-top { top: 6px; }
.hover-info.at-bottom { bottom: 6px; }
.hover-info.show { display: block; }

.legend {
    flex: 0 0 auto;
    font-size: 14px;
    line-height: 1.35;
    color: #333;
}

.lg-path {
    font-weight: bold;
    color: #005a8c;
    border-bottom: 3px solid #0072b2;
}

/* ===========================================
   EXERCISE PANEL
   =========================================== */
.right-panel {
    flex: 0 0 auto;
    display: flex;
    flex-direction: column;
    gap: 5px;
    background-color: rgba(255, 255, 255, 0.95);
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    padding: 7px 10px;
    min-height: 0;
}

.q-header {
    font-size: 15px;
    font-weight: bold;
    color: #003f73;
}

.question {
    font-size: 17px;
    font-weight: bold;
    line-height: 1.3;
}

.entity-label {
    font-size: 14px;
    color: #333;
}

.entities {
    display: flex;
    flex-wrap: wrap;
    gap: 4px;
}

.ent-btn {
    font-size: 14px;
    padding: 3px 7px;
    border: 2px solid #8aa4bd;
    border-radius: 6px;
    background: #fbfdff;
    color: #1a1a1a;
    cursor: pointer;
}

.ent-btn:hover { border-color: #0072b2; }
.ent-btn[aria-pressed="true"] {
    border-color: #003f73;
    background: #d6eaf8;
    font-weight: bold;
}
.ent-btn:disabled { cursor: default; }
.ent-btn.is-correct { border-color: #003f73; background: #e3f1fb; font-weight: bold; }
.ent-btn.is-missed  { border-color: #003f73; border-style: dashed; background: #fff; font-weight: bold; }
.ent-btn.is-wrong   { border-color: #d55e00; border-style: dashed; background: #fdf0e1; color: #8a3c00; }
.ent-btn:disabled:not(.is-correct):not(.is-missed):not(.is-wrong) { color: #666; }

.feedback {
    font-size: 15px;
    line-height: 1.35;
}

.feedback:empty { display: none; }

.feedback .fb {
    padding: 5px 8px;
    border-radius: 6px;
    border-left: 5px solid #0072b2;
    background: #eef6fc;
}

.feedback .fb.fb-wrong {
    border-left-color: #d55e00;
    background: #fdf0e1;
}

.feedback .fb-final {
    margin-top: 4px;
    font-weight: bold;
}

/* ===========================================
   CONTROL BUTTONS
   =========================================== */
.controls {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    align-items: center;
}

.btn {
    padding: 6px 14px;
    font-size: 15px;
    font-weight: bold;
    border: none;
    border-radius: 6px;
    cursor: pointer;
}

.btn:focus-visible, .ent-btn:focus-visible { outline: 3px solid #56b4e9; outline-offset: 2px; }

.btn-primary { background-color: #0072b2; color: white; }
.btn-primary:hover { background-color: #005a8c; }
.btn-primary:disabled { background-color: #9cc3dd; cursor: not-allowed; }

.btn-secondary { background-color: #616161; color: white; }
.btn-secondary:hover { background-color: #4a4a4a; }

.score {
    font-size: 15px;
    font-weight: bold;
    margin-left: auto;
}

.back-link {
    flex: 0 0 auto;
    font-size: 14px;
    color: #005a8c;
}

/* ===========================================
   WIDE: graph left, exercise right
   =========================================== */
@media (min-width: 1000px) {
    .layout { flex-direction: row; gap: 10px; }
    .right-panel { flex: 0 0 380px; }
    .controls { margin-top: auto; }
}

/* ===========================================
   NARROW: tighten spacing
   =========================================== */
@media (max-width: 599px) {
    .container { padding: 4px 6px 2px 6px; gap: 4px; }
    .title { font-size: 17px; }
    .subtitle { font-size: 15px; }
    .legend { font-size: 13px; }
    .question { font-size: 16px; }
    .ent-btn { font-size: 13px; padding: 2px 5px; }
    .feedback { font-size: 14px; }
    .btn { padding: 6px 10px; font-size: 14px; }
    .score { font-size: 14px; }
    .hover-info { font-size: 14px; }
}

/* xAPI teaching panel (?xapi=teaching): pin the layout to its production height and let the page scroll. */
html:has(.xapi-panel), body:has(.xapi-panel) { height: auto; overflow: auto; }
body:has(.xapi-panel) .container { height: 840px; }