/* ── static/css/graph.css ───────────────────────────────────────────────────
   Knowledge-graph visualization styles.
   Structural layout handled by Bootstrap 5 utilities in graph.html.
   --nav-height: set this CSS var in your base layout to match your header.
   Default assumes 64px.
   ─────────────────────────────────────────────────────────────────────────── */

/* ── Design tokens (dark-first) ─────────────────────────────────────────── */
:root {
  --g-bg:               #090e14;
  --g-ctrl-bg:          #0d1621;
  --g-ctrl-border:      #1a2e40;
  --g-sidebar-bg:       #0b1520;
  --g-sidebar-border:   #1a2e40;
  --g-text:             #c4d8e8;
  --g-text-muted:       #4a6a7c;
  --g-text-dim:         #2a4050;
  --g-accent:           #e8c36a;
  --g-accent-hover:     #f5d880;
  --g-pill-bg:          #122030;
  --g-pill-color:       #6ab4cc;
  --g-label:            #7aadc0;
  --g-input-bg:         #0d1621;
  --g-btn-border:       #1e3448;
  --g-loading-bg:       rgba(9,14,20,0.85);
}

@media (prefers-color-scheme: light) {
  :root {
    --g-bg:             #f0f4f8;
    --g-ctrl-bg:        #e8eef5;
    --g-ctrl-border:    #c8d8e8;
    --g-sidebar-bg:     #f7fafc;
    --g-sidebar-border: #c8d8e8;
    --g-text:           #1a2a38;
    --g-text-muted:     #5a7888;
    --g-text-dim:       #c0d0dc;
    --g-accent:         #b07a10;
    --g-accent-hover:   #d09520;
    --g-pill-bg:        #daeaf6;
    --g-pill-color:     #2a6080;
    --g-label:          #2a5068;
    --g-input-bg:       #f7fafc;
    --g-btn-border:     #c0d0dc;
    --g-loading-bg:     rgba(240,244,248,0.85);
  }
}

/* ── Reset for graph page elements ──────────────────────────────────────── */
#graph-page *,
#graph-page *::before,
#graph-page *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

/* Restore Bootstrap padding killed by the reset above */
#graph-page .badge        { padding: 0.35em 0.65em; }
#graph-page .form-control { padding: 0.375rem 0.75rem; }
#graph-page .form-control-sm { padding: 0.25rem 0.5rem; }
#graph-page .btn          { padding: 0.375rem 0.75rem; }
#graph-page .btn-sm       { padding: 0.25rem 0.5rem; }

/* ── Break out of the page layout container ──────────────────────────────── */
#content {
  max-width: 100% !important;
  width: 100% !important;
  padding: 0 !important;
  margin: 0 !important;
  margin-top: -1rem !important; /* cancel navbar's mb-3 */
  flex-grow: 1;
  overflow: hidden;
}
#content > h1 { display: none; }

/* ── Page shell ──────────────────────────────────────────────────────────── */
#graph-page {
  height: 100%;
  background: var(--g-bg);
  font-family: system-ui, -apple-system, sans-serif;
  color: var(--g-text);
  width: 100%;
}

/* ── Controls bar ────────────────────────────────────────────────────────── */
#graph-controls {
  gap: 6px 14px;
  padding: 7px 14px;
  background: var(--g-ctrl-bg);
  border-bottom: 1px solid var(--g-ctrl-border);
  min-height: 40px;
}

.ctrl-label {
  font-size: 13px;
  color: var(--g-text);
  cursor: pointer;
}

.ctrl-label input[type="checkbox"] {
  width: 14px;
  height: 14px;
  accent-color: var(--g-accent);
  cursor: pointer;
  flex-shrink: 0;
}

.ctrl-label input[type="checkbox"]:disabled + .swatch,
.ctrl-label input[type="checkbox"]:disabled ~ span {
  opacity: 0.4;
}

/* Inline edge-colour swatch next to each checkbox */
.swatch {
  display: inline-block;
  width: 18px;
  height: 2px;
  border-radius: 1px;
  flex-shrink: 0;
}
.swatch-bl { background: rgba(94,190,210,0.85); }
.swatch-se { background: rgba(240,180,80,0.85);  }
.swatch-bl-arrow { flex-shrink: 0; }

/* Node legend dot */
.swatch-dot {
  display: inline-block;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  flex-shrink: 0;
}
.swatch-dot-unconnected {
  background: transparent;
  border: 1.5px dashed rgba(74,144,184,0.65);
}
.swatch-dot-connected {
  background: #4a90b8;
}

.swatch-degree {
  display: inline-block;
  width: 48px;
  height: 6px;
  border-radius: 3px;
  flex-shrink: 0;
  background: linear-gradient(to right, #4a90b8, #a8e4ff);
}

.legend-cnt {
  font-size: 10px;
  opacity: 0.6;
  font-weight: 400;
}

/* Separator */
.ctrl-sep {
  width: 1px;
  height: 18px;
  background: var(--g-ctrl-border);
}

/* Search — BS5 form-control-sm provides structure; override colors */
#graph-search {
  width: 190px;
  background: var(--g-input-bg);
  color: var(--g-text);
  border-color: var(--g-btn-border);
  outline: none;
  transition: border-color 0.15s;
}
#graph-search::placeholder { color: var(--g-text-muted); }
#graph-search:focus { border-color: var(--g-accent); }

/* Control buttons — BS5 btn btn-sm provides structure; override colors */
#btn-fit,
#btn-help,
#btn-zoom-in,
#btn-zoom-out,
#btn-fullscreen {
  border-color: var(--g-btn-border);
  background: transparent;
  color: var(--g-text-muted);
  font-size: 12px;
  white-space: nowrap;
  transition: color 0.15s, border-color 0.15s;
  position: relative;
  overflow: hidden;
}
#btn-fit:hover,
#btn-help:hover,
#btn-zoom-in:hover,
#btn-zoom-out:hover,
#btn-fullscreen:hover { color: var(--g-text); border-color: var(--g-text-muted); }

/* Click ripple */
.ctrl-ripple {
  position: absolute;
  border-radius: 50%;
  transform: scale(0);
  animation: ctrl-ripple-anim 0.45s linear;
  background: rgba(196, 216, 232, 0.25);
  pointer-events: none;
}
@keyframes ctrl-ripple-anim {
  to { transform: scale(4); opacity: 0; }
}

/* ── Tooltip ─────────────────────────────────────────────────────────────── */
#graph-tooltip {
  position: absolute;
  z-index: 15;
  pointer-events: none;
  background: var(--g-sidebar-bg);
  border: 1px solid var(--g-sidebar-border);
  border-radius: 6px;
  padding: 6px 10px;
  font-size: 12px;
  color: var(--g-text);
  max-width: 220px;
  box-shadow: 0 2px 10px rgba(0,0,0,0.35);
  display: none;
  line-height: 1.4;
}
#graph-tooltip.visible { display: block; }
#graph-tooltip .tt-title { font-weight: 600; }
#graph-tooltip .tt-date  { font-size: 11px; color: var(--g-text-muted); margin-top: 2px; }

/* Canvas (edges) sits behind SVG (nodes) */
#graph-canvas { position: absolute; inset: 0; z-index: 1; }
#graph-svg    { position: absolute; inset: 0; z-index: 2; touch-action: none; }

/* ── Loading overlay ─────────────────────────────────────────────────────── */
#graph-loading {
  z-index: 20;
  font-size: 13px;
  color: var(--g-text-muted);
  background: var(--g-loading-bg);
  pointer-events: none;
  transition: opacity 0.4s;
}
#graph-loading.hidden {
  opacity: 0;
}

/* ── Sidebar ─────────────────────────────────────────────────────────────── */
#graph-sidebar {
  width: 288px;
  background: var(--g-sidebar-bg);
  border-left: 1px solid var(--g-sidebar-border);
  z-index: 10;
  transform: translateX(100%);
  transition: transform 0.22s ease;
  overflow: hidden;
}
#graph-sidebar.open {
  transform: translateX(0);
  box-shadow: -4px 0 24px rgba(0,0,0,0.35);
}

.sb-header {
  border-bottom: 1px solid var(--g-sidebar-border);
}

.sb-header h2 {
  font-size: 14px;
  font-weight: 600;
  color: var(--g-text);
  line-height: 1.4;
}

#sb-close {
  background: none;
  border: none;
  color: var(--g-text-muted);
  font-size: 20px;
  line-height: 1;
  cursor: pointer;
  padding: 0;
  flex-shrink: 0;
  transition: color 0.12s;
}
#sb-close:hover { color: var(--g-text); }

.sb-body {
  scrollbar-width: thin;
  scrollbar-color: var(--g-ctrl-border) transparent;
}

.sb-date {
  font-size: 11px;
  color: var(--g-text-muted);
}

.pill {
  font-size: 11px;
  padding: 2px 8px;
  border-radius: 10px;
  background: var(--g-pill-bg);
  color: var(--g-pill-color);
}

.sb-desc {
  font-size: 13px;
  color: var(--g-text-muted);
  line-height: 1.55;
}

.sb-open-link {
  display: inline-block;
  font-size: 13px;
  color: var(--g-accent);
  text-decoration: none;
  margin-bottom: 10px;
}
.sb-open-link:hover {
  color: var(--g-accent-hover);
  text-decoration: underline;
}

/* Neighbour section headings */
.sb-sec {
  font-size: 10px;
  font-weight: 700;
  color: var(--g-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.07em;
  margin: 6px 0 4px;
}
.sb-sec:first-child { margin-top: 4px; }

.sb-cnt {
  font-weight: 400;
  opacity: 0.65;
}

.sb-empty {
  font-size: 12px;
  color: var(--g-text-dim);
}

/* Neighbour buttons */
.nbr-btn {
  display: block;
  width: 100%;
  text-align: left;
  background: none;
  border: none;
  border-bottom: 1px solid var(--g-ctrl-border);
  padding: 6px 0;
  font-size: 12px;
  color: var(--g-text);
  cursor: pointer;
  line-height: 1.4;
  transition: color 0.12s;
}
.nbr-btn:last-child { border-bottom: none; }
.nbr-btn:hover { color: var(--g-accent); }

/* ── SVG node labels ─────────────────────────────────────────────────────── */
.nn { transition: fill 140ms ease, opacity 140ms ease; }
.nl {
  font-family: system-ui, -apple-system, sans-serif;
  font-size: 10px;
  fill: var(--g-label);
  pointer-events: none;
}

/* ── Help modal ──────────────────────────────────────────────────────────── */
.graph-help-modal-content {
  background: var(--g-sidebar-bg);
  border: 1px solid var(--g-sidebar-border);
  color: var(--g-text);
}

.graph-help-modal-content .modal-header {
  padding: 16px 20px 10px;
}

.graph-help-modal-content .modal-title {
  font-size: 15px;
  font-weight: 600;
  color: var(--g-text);
}

#graph-help-close {
  position: absolute;
  top: 12px;
  right: 16px;
  z-index: 1;
  background: none;
  border: none;
  color: var(--g-text-muted);
  font-size: 22px;
  line-height: 1;
  cursor: pointer;
  padding: 0;
  transition: color 0.12s;
}
#graph-help-close:hover { color: var(--g-text); }

.graph-help-modal-content .modal-body {
  padding: 4px 20px 20px;
}

.help-intro {
  font-size: 12px;
  color: var(--g-text-muted);
  line-height: 1.6;
  margin-bottom: 16px;
}

.help-section {
  margin-bottom: 16px;
}

.help-section-title {
  font-size: 10px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.07em;
  color: var(--g-text-muted);
  margin-bottom: 6px;
}

.help-row {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 4px 0;
  border-bottom: 1px solid var(--g-ctrl-border);
  font-size: 12px;
}
.help-row:last-child { border-bottom: none; }

.help-key {
  flex-shrink: 0;
  width: 130px;
  font-weight: 500;
  color: var(--g-accent);
}

.help-desc {
  color: var(--g-text-muted);
  line-height: 1.4;
}

/* ── Fullscreen layout fixes ─────────────────────────────────────────────── */
body.graph-fullscreen #content {
  margin: 0 !important;
  height: 100vh !important;
  max-height: 100vh !important;
}

/* ── Mobile ──────────────────────────────────────────────────────────────── */
@media (max-width: 600px) {
  #graph-controls {
    gap: 5px 10px;
    padding: 6px 10px;
  }

  #graph-search {
    width: 120px;
  }

  #btn-fit {
    margin-left: 0;
  }

  #btn-zoom-in,
  #btn-zoom-out,
  #btn-fullscreen,
  #btn-fullscreen + .ctrl-sep {
    display: none;
  }

  /* Sidebar becomes a bottom sheet on mobile */
  #graph-sidebar {
    width: 100%;
    height: 56%;
    top: auto;
    bottom: 0;
    right: 0;
    border-left: none;
    border-top: 1px solid var(--g-sidebar-border);
    transform: translateY(100%);
    border-radius: 12px 12px 0 0;
  }
  #graph-sidebar.open {
    transform: translateY(0);
    box-shadow: 0 -4px 24px rgba(0,0,0,0.4);
  }

  .sb-header { padding: 12px 14px 10px; }
}