:root {
  
  --bg:        #1a4a9a;
  --bg2:       #124088;
  --bg3:       #0d3880;

  --panel:     rgba(10, 40, 100, 0.72);
  --panel2:    rgba(20, 60, 130, 0.6);
  --panel3:    rgba(30, 80, 160, 0.45);

  --border:    #c8ddf0;
  --border2:   #a8c8e8;
  --border3:   #80aad4;

  --accent:    #00ddff;
  --accent2:   #44eeff;
  --accent3:   #aaf4ff;

  --gold:      #ffd700;
  --gold2:     #ffaa00;

  --text:      #0d2640;
  --text2:     #001428;
  --muted:     #7a9ab8;
  --muted2:    #4a6e90;

  --red:       #cc2233;
  --gap:       #bb6600;
  --mint:      #007755;
  --mint2:     #005540;
  --silver:    #c8dff0;
  --silver2:   #e4f0fa;

  --novice:    #1a88dd;
  --inter:     #0066bb;
  --expert:    #004499;

  --state-viewed:    #2255bb;
  --state-studied:   #0044aa;
  --state-conquered: #cc8800;

  --hud-h:     54px;
  --panel-w:   520px;
  --panel-w-md:380px;

  --orbitron:  'Orbitron','Arial Black',sans-serif;
  --mono:      'Share Tech Mono','Courier New',monospace;
  --body:      'Rajdhani',Arial,sans-serif;
}

*,*::before,*::after { box-sizing:border-box; margin:0; padding:0; }
html,body { height:100%; overflow:hidden; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--body);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

.hidden { display:none !important; }

#graph-svg {
  position: fixed;
  inset: 0;
  width: 100vw;
  height: 100vh;
  background: radial-gradient(ellipse 120% 120% at 50% 30%, #ffffff 0%, #e8f4ff 35%, #cce0f8 70%, #b8d0ee 100%);
  cursor: grab;
  z-index: 0;
  touch-action: none;
  -webkit-tap-highlight-color: transparent;
}

.node { cursor: pointer; touch-action: none; transition: opacity 0.22s ease; }
#graph-svg:active { cursor: grabbing; }

.node { cursor: pointer; }
.node text { pointer-events: none; }

.node-ring { pointer-events: none; }

@keyframes conquest-pulse {
  0%, 100% { opacity: 0.35; }
  50%       { opacity: 0.75; }
}
.node-conquest-ring {
  pointer-events: none;
  animation: conquest-pulse 2.4s ease-in-out infinite;
}

.node.selected .node-glow { opacity: 0.6 !important; }
.node.selected .node-main  { stroke: #ffffff; stroke-width: 2.5; }

/* Hover: dim non-neighbor nodes */
.node.nb-dim { opacity: 0.1 !important; }

/* Spotlight (panel open on a node): deep dim everything non-connected */
#graph-svg.spotlight .node:not(.selected) { opacity: 0.08 !important; }

/* Spotlight: make the labels on the focused (connected) nodes large, bold, and
   haloed so they read clearly -- and photograph well for screenshots. The white
   stroke under the fill (paint-order: stroke) gives a crisp outline against the
   busy graph. */
#graph-svg.spotlight .node.selected .node-label {
  font-size: 18px !important;
  font-weight: 700 !important;
  fill: #08203a !important;
  paint-order: stroke;
  stroke: #ffffff;
  stroke-width: 4px;
  stroke-linejoin: round;
  letter-spacing: 0.04em;
}

/* Spotlight: predicate label sitting halfway along each connected edge. */
.spotlight-edge-labels text {
  font-family: 'Rajdhani', Arial, sans-serif;
  font-weight: 700;
  font-size: 12.5px;
  fill: #0a2a4a;
  paint-order: stroke;
  stroke: #ffffff;
  stroke-width: 3.5px;
  stroke-linejoin: round;
  text-transform: uppercase;
  letter-spacing: 0.07em;
}

/* Performance: the visual edge layer, the spotlight link layer, and all node
   labels are purely decorative -- the transparent hit layer (.edges-h) and the
   node circles handle all interaction. Making these non-interactive means a
   pan or a mousemove no longer hit-tests hundreds/thousands of these shapes. */
.edges-v, .spotlight-links { pointer-events: none; }
.node-label, .sg-label { pointer-events: none; }

.edge-visual { transition: stroke-opacity 0.18s, stroke-width 0.18s; }
.edge-visual.hovered   { stroke-opacity: 1 !important;    stroke-width: 2.5px !important; }
.edge-visual.faded     { stroke-opacity: 0.04 !important; }
/* Spotlight: connected edges reveal fully; non-connected stay dark */
.edge-visual.connected { stroke-opacity: 1 !important;    stroke-width: 2.2px !important; }
#graph-svg.spotlight .edge-visual:not(.connected):not(.hovered) { stroke-opacity: 0.03 !important; }

.edge-hit { cursor: default; }
.edge-hit.clickable   { cursor: pointer; }
/* In spotlight mode, only edges actually connected to the selected node are
   interactive. Non-connected hit lines become click-through, so accidentally
   landing on a faded edge no longer opens its panel and adds clutter. */
#graph-svg.spotlight .edge-hit:not(.connected) { pointer-events: none; }

/* Spotlight link ghosts (Wikipedia outer ring) */
.sg { cursor: pointer; }
.sg text { pointer-events: none; }
.sg:hover > circle { stroke: rgba(180,210,255,0.8) !important; }

#hud {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  background: linear-gradient(180deg, rgba(255,255,255,0.95) 0%, rgba(232,244,255,0.92) 100%);
  border-bottom: 1px solid #99c4e8;
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  box-shadow: 0 2px 12px rgba(80,140,200,0.15);
}

#hud-main {
  height: var(--hud-h);
  padding: 0 14px;
  display: flex;
  align-items: center;
  gap: 12px;
}

.hud-logo {
  font-family: var(--orbitron);
  font-size: 15px;
  font-weight: 900;
  letter-spacing: 0.1em;
  color: #0a2a4a;
  text-decoration: none;
  white-space: nowrap;
  flex-shrink: 0;
}
.hud-logo span { color: #0077cc; }

#hud-search-wrap {
  position: relative;
  flex: 1;
  max-width: 460px;
  min-width: 0;
}

.hud-search-icon {
  position: absolute;
  left: 9px; top: 50%;
  transform: translateY(-50%);
  color: var(--muted);
  font-size: 14px;
  pointer-events: none;
  z-index: 1;
}

#topic-input {
  width: 100%;
  background: rgba(255,255,255,0.7);
  border: 1px solid var(--border2);
  color: var(--text2);
  font-family: var(--mono);
  font-size: 11px;
  padding: 8px 10px 8px 28px;
  outline: none;
  letter-spacing: 0.04em;
  transition: all 0.15s;
}
#topic-input:focus {
  border-color: var(--accent);
  background: rgba(255,255,255,0.95);
  box-shadow: 0 0 0 2px rgba(0,120,220,0.15);
}
#topic-input::placeholder { color: var(--muted); }

.btn-random {
  flex-shrink: 0;
  background: linear-gradient(180deg, #ffffff 0%, #ddeeff 100%);
  border: 1px solid var(--border3);
  color: var(--accent);
  font-family: var(--orbitron);
  font-size: 9px;
  font-weight: 700;
  letter-spacing: 0.14em;
  padding: 6px 12px;
  cursor: pointer;
  transition: all 0.14s;
  white-space: nowrap;
  box-shadow: 0 1px 3px rgba(0,80,160,0.12), inset 0 1px 0 #fff;
}
.btn-random:hover {
  background: linear-gradient(180deg, #eef8ff 0%, #cce4ff 100%);
  border-color: var(--accent);
  box-shadow: 0 2px 10px rgba(0,100,200,0.2);
}

#hud-meta {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--mono);
  font-size: 10px;
  color: var(--muted);
  white-space: nowrap;
  flex-shrink: 0;
}
#hud-meta strong { color: var(--text); }

.live-dot {
  display: inline-block;
  width: 5px; height: 5px;
  border-radius: 50%;
  background: var(--border2);
  transition: background 0.4s;
}
.live-dot.on {
  background: #00e87a;
  animation: livepulse 2s ease-in-out infinite;
}
@keyframes livepulse { 0%,100%{opacity:1} 50%{opacity:0.3} }

#input-error {
  padding: 5px 14px 6px;
  font-family: var(--mono);
  font-size: 10px;
  color: var(--red);
  border-top: 1px solid rgba(192,64,64,0.2);
  background: rgba(192,64,64,0.05);
}

.ac-dropdown {
  display: none;
  position: absolute;
  top: calc(100% + 2px);
  left: 0; right: 0;
  background: var(--panel2);
  border: 1px solid var(--border2);
  border-top: none;
  z-index: 9999;
  box-shadow: 0 12px 28px rgba(0,0,0,0.8);
  max-height: 260px;
  overflow-y: auto;
}
.ac-dropdown.open { display: block; }
.ac-item {
  padding: 8px 12px;
  font-size: 12px;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 8px;
  border-bottom: 1px solid var(--border);
  transition: background 0.07s;
  color: var(--text);
}
.ac-item:last-child { border-bottom: none; }
.ac-item:hover,.ac-item.ac-sel { background: rgba(58,104,168,0.12); }
.ac-badge {
  font-family: var(--orbitron);
  font-size: 8px;
  font-weight: 700;
  color: var(--accent2);
  border: 1px solid rgba(58,104,168,0.4);
  padding: 1px 4px;
  flex-shrink: 0;
}
.ac-name { font-size: 12px; color: var(--text); flex-shrink: 0; }
.ac-desc {
  font-family: var(--mono);
  font-size: 10px;
  color: var(--muted);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  flex: 1;
  min-width: 0;
}

#detail-panel {
  position: fixed;
  top: var(--hud-h);
  right: 0;
  width: var(--panel-w);
  height: calc(100vh - var(--hud-h));
  background: linear-gradient(180deg, rgba(255,255,255,0.94) 0%, rgba(235,246,255,0.96) 100%);
  border-left: 1px solid #99c4e8;
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  transform: translateX(var(--panel-w));
  transition: transform 0.28s cubic-bezier(0.4,0,0.2,1);
  z-index: 90;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  box-shadow: -4px 0 24px rgba(60,120,200,0.15);
}
#detail-panel.open { transform: translateX(0); }

#panel-header {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 12px;
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
  min-height: 46px;
}

#btn-panel-back {
  background: none;
  border: 1px solid var(--border2);
  color: var(--muted);
  font-size: 14px;
  width: 28px; height: 28px;
  cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0;
  transition: color 0.12s, border-color 0.12s;
}
#btn-panel-back:hover { color: var(--text); border-color: var(--accent); }

#panel-title-wrap {
  flex: 1;
  min-width: 0;
  display: flex;
  align-items: center;
  gap: 7px;
}

#panel-title {
  font-family: var(--orbitron);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--text2);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.panel-badge {
  font-family: var(--mono);
  font-size: 8px;
  letter-spacing: 1px;
  text-transform: uppercase;
  padding: 2px 6px;
  border: 1px solid;
  flex-shrink: 0;
}
.panel-badge.canonical  { color: var(--gold);    border-color: #5a4000; }
.panel-badge.curiosity  { color: #4ecdc4;        border-color: #1a4540; }
.panel-badge.stub       { color: var(--muted);   border-color: var(--border2); }

.panel-wiki-btn {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--muted);
  text-decoration: none;
  flex-shrink: 0;
  transition: color 0.12s;
}
.panel-wiki-btn:hover { color: var(--accent2); }

#study-tabs {
  display: flex;
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
  overflow-x: auto;
  scrollbar-width: none;
}
#study-tabs::-webkit-scrollbar { display: none; }

.stab {
  flex-shrink: 0;
  background: none;
  border: none;
  border-bottom: 2px solid transparent;
  color: var(--muted2);
  font-family: var(--orbitron);
  font-size: 8px;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  padding: 10px 12px;
  cursor: pointer;
  white-space: nowrap;
  transition: color 0.12s, border-color 0.12s;
  margin-bottom: -1px;
}
.stab:hover { color: var(--text); }
.stab.active { color: var(--text2); border-bottom-color: var(--mint); }

#panel-body {
  flex: 1;
  overflow-y: auto;
  scrollbar-width: thin;
  scrollbar-color: var(--border2) transparent;
}
#panel-body::-webkit-scrollbar { width: 4px; }
#panel-body::-webkit-scrollbar-thumb { background: var(--border2); }

.pc { padding: 16px; }

#pc-idle {
  display: flex;
  align-items: center;
  justify-content: center;
  height: 100%;
  min-height: 300px;
}
.pc-idle-inner {
  text-align: center;
  color: var(--muted2);
  padding: 8px;
}
.idle-glyph {
  font-size: 44px;
  color: var(--accent2);
  margin-bottom: 16px;
  display: block;
  text-shadow: 0 0 30px rgba(0, 180, 255, 0.6), 0 0 60px rgba(0, 100, 255, 0.3);
  animation: idle-pulse 3.5s ease-in-out infinite;
}
@keyframes idle-pulse {
  0%, 100% { opacity: 0.8; text-shadow: 0 0 30px rgba(0,180,255,0.6), 0 0 60px rgba(0,100,255,0.3); }
  50%       { opacity: 1;   text-shadow: 0 0 50px rgba(0,200,255,0.9), 0 0 90px rgba(0,120,255,0.5); }
}
.idle-tagline {
  font-family: var(--orbitron);
  font-size: 13px;
  font-weight: 700;
  color: var(--text2);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  margin-bottom: 6px;
}
.idle-mission {
  font-size: 12px;
  line-height: 1.75;
  color: var(--text);
  margin-bottom: 10px;
  padding: 10px 14px;
  border-left: 3px solid var(--accent);
  background: rgba(0,80,180,0.05);
  text-align: left;
}
.idle-hint {
  font-family: var(--mono);
  font-size: 10px;
  line-height: 1.9;
  letter-spacing: 0.06em;
  margin-bottom: 20px;
  color: var(--muted2);
  text-transform: uppercase;
}
.idle-legend {
  display: inline-flex;
  flex-direction: column;
  gap: 7px;
  text-align: left;
  background: rgba(255,255,255,0.6);
  border: 1px solid var(--border2);
  padding: 12px 16px;
}
.idle-legend-title {
  font-family: var(--mono);
  font-size: 9px;
  color: var(--accent2);
  letter-spacing: 1.2px;
  text-transform: uppercase;
  margin-bottom: 4px;
}
.leg-row {
  display: flex;
  align-items: center;
  gap: 9px;
  font-family: var(--mono);
  font-size: 11px;
  color: var(--muted2);
  letter-spacing: 0.04em;
}
.leg-swatch {
  display: inline-block;
  width: 10px; height: 10px;
  border-radius: 50%;
  border: 2px solid;
}
.leg-swatch.untouched { background: transparent;          border-color: var(--border2); opacity: 0.4; }
.leg-swatch.viewed    { background: var(--state-viewed);  border-color: var(--state-viewed); opacity: 0.6; }
.leg-swatch.studied   { background: var(--accent);        border-color: var(--accent2); }
.leg-swatch.conquered { background: var(--gold2);         border-color: var(--gold); box-shadow: 0 0 6px rgba(255,215,0,0.4); }

.idle-library {
  margin-top: 18px;
  width: 100%;
  text-align: left;
}
.idle-library-title {
  font-family: var(--mono);
  font-size: 9px;
  color: var(--accent2);
  letter-spacing: 1.2px;
  text-transform: uppercase;
  margin-bottom: 8px;
}
.lib-entry {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 7px 0;
  border-bottom: 1px solid rgba(255,255,255,0.08);
  cursor: pointer;
  transition: opacity 0.12s;
}
.lib-entry:hover { opacity: 0.75; }
.lib-entry-domain {
  width: 6px; height: 6px;
  border-radius: 50%;
  flex-shrink: 0;
}
.lib-entry-title {
  font-family: var(--mono);
  font-size: 10px;
  color: var(--text);
  flex: 1;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.lib-entry-state {
  font-family: var(--mono);
  font-size: 8px;
  letter-spacing: 0.06em;
  padding: 1px 5px;
  border-radius: 2px;
}
.lib-entry-state.studied   { color: var(--accent2);  border: 1px solid var(--accent2); }
.lib-entry-state.conquered { color: var(--gold);     border: 1px solid var(--gold); }
.lib-entry-state.viewed    { color: var(--muted);    border: 1px solid var(--border2); }

.pc-loading-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 14px;
  padding: 40px 16px;
  text-align: center;
}
.loading-ring {
  width: 36px; height: 36px;
  border: 2px solid var(--border2);
  border-top-color: var(--accent2);
  border-radius: 50%;
  animation: spin 0.85s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }
.loading-msg {
  font-family: var(--orbitron);
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--text);
  text-transform: uppercase;
}
.loading-steps { display: flex; flex-direction: column; gap: 4px; }
.loading-step {
  font-family: var(--mono);
  font-size: 10px;
  color: var(--muted);
  letter-spacing: 0.04em;
  transition: color 0.3s;
}
.loading-step.active { color: var(--text); }
.loading-step.done   { color: var(--accent2); }
.loading-step.done::before { content: '> '; }

.art-title {
  font-family: var(--orbitron);
  font-size: 13px;
  font-weight: 700;
  color: var(--text2);
  letter-spacing: 0.05em;
  margin-bottom: 10px;
  line-height: 1.4;
}
.art-excerpt {
  font-size: 13px;
  color: var(--text);
  line-height: 1.75;
  margin-bottom: 10px;
  white-space: pre-wrap;
  word-break: break-word;
}
.art-read-more {
  display: block;
  width: 100%;
  background: none;
  border: none;
  border-top: 1px solid var(--border2);
  color: var(--accent2);
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  padding: 8px 0;
  cursor: pointer;
  text-align: left;
  margin-bottom: 12px;
  transition: color 0.12s;
}
.art-read-more:hover { color: var(--accent3); }
.art-full-text {
  font-size: 13px;
  color: var(--text);
  line-height: 1.75;
  margin-bottom: 14px;
  max-height: 320px;
  overflow-y: auto;
  white-space: pre-wrap;
  word-break: break-word;
  padding-right: 6px;
  scrollbar-width: thin;
  scrollbar-color: var(--border2) transparent;
}
.art-full-text::-webkit-scrollbar { width: 3px; }
.art-full-text::-webkit-scrollbar-thumb { background: var(--border2); }
.art-meta {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--muted2);
  letter-spacing: 0.06em;
  display: flex;
  gap: 6px;
  align-items: center;
}

.art-ctas {
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.btn-cta-primary {
  display: block;
  width: 100%;
  padding: 13px 14px;
  background: linear-gradient(180deg, #2288ee 0%, #0066cc 100%);
  border: 1px solid #0055aa;
  color: #ffffff;
  font-family: var(--orbitron);
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  cursor: pointer;
  transition: all 0.14s;
  text-align: center;
  box-shadow: 0 2px 8px rgba(0,80,200,0.3), inset 0 1px 0 rgba(255,255,255,0.25);
}
.btn-cta-primary:hover {
  background: linear-gradient(180deg, #44aaff 0%, #1188ee 100%);
  box-shadow: 0 4px 16px rgba(0,100,220,0.4), inset 0 1px 0 rgba(255,255,255,0.3);
}
.btn-cta-secondary {
  display: block;
  width: 100%;
  padding: 9px 14px;
  background: none;
  border: 1px solid var(--border2);
  color: var(--muted2);
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.08em;
  cursor: pointer;
  transition: border-color 0.12s, color 0.12s;
  text-align: center;
}
.btn-cta-secondary:hover { border-color: var(--accent); color: var(--accent2); }
.btn-cta-secondary:disabled { opacity: 0.4; cursor: default; }

.art-sep {
  border: none;
  border-top: 1px solid var(--border);
  margin: 14px 0;
}

/* ── Disambiguation page panel ── */
.disambig-notice {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 12px 14px;
  margin-bottom: 14px;
  background: rgba(120,160,220,0.06);
  border: 1px solid var(--border2);
  border-left: 3px solid var(--accent2);
  border-radius: 4px;
}
.disambig-notice p {
  font-size: 12px;
  color: var(--text);
  line-height: 1.6;
  margin: 0;
}
.disambig-badge {
  align-self: flex-start;
  font-family: var(--mono);
  font-size: 9px;
  font-weight: 600;
  letter-spacing: 0.16em;
  color: var(--accent2);
  border: 1px solid var(--accent2);
  border-radius: 3px;
  padding: 2px 7px;
}
.disambig-links {
  display: flex;
  flex-direction: column;
  gap: 4px;
  max-height: 420px;
  overflow-y: auto;
  padding-right: 4px;
  scrollbar-width: thin;
  scrollbar-color: var(--border2) transparent;
}
.disambig-links::-webkit-scrollbar { width: 3px; }
.disambig-links::-webkit-scrollbar-thumb { background: var(--border2); }
.disambig-link {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  width: 100%;
  text-align: left;
  padding: 9px 12px;
  background: none;
  border: 1px solid var(--border2);
  border-radius: 4px;
  color: var(--text);
  font-family: var(--body);
  font-size: 13px;
  cursor: pointer;
  transition: border-color 0.12s, color 0.12s, background 0.12s;
}
.disambig-link:hover {
  border-color: var(--accent);
  color: var(--accent2);
  background: rgba(120,160,220,0.08);
}
.disambig-link-arrow {
  font-family: var(--mono);
  color: var(--muted2);
  opacity: 0.6;
  flex-shrink: 0;
}
.disambig-link:hover .disambig-link-arrow { color: var(--accent2); opacity: 1; }
.disambig-empty {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--muted2);
  padding: 10px 0;
}

.nd-hook {
  padding: 13px 15px;
  background: rgba(0,80,180,0.06);
  border-left: 3px solid var(--accent);
  font-size: 13px;
  color: var(--text2);
  line-height: 1.75;
  font-style: italic;
  margin-bottom: 14px;
}
.nd-section {
  font-family: var(--mono);
  font-size: 10px;
  color: var(--muted2);
  letter-spacing: 1.5px;
  text-transform: uppercase;
  margin: 14px 0 7px;
  display: flex;
  align-items: center;
  gap: 6px;
}
.nd-section::after {
  content: '';
  flex: 1;
  height: 1px;
  background: linear-gradient(90deg, var(--border2), transparent);
}
.score-row {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 8px;
  font-family: var(--mono);
  font-size: 11px;
}
.score-row .lbl { color: var(--muted2); width: 52px; letter-spacing: 0.06em; }
.score-track {
  flex: 1;
  height: 5px;
  background: rgba(255,255,255,0.1);
  border-radius: 2px;
  overflow: hidden;
  border: 1px solid rgba(255,255,255,0.2);
}
.score-fill {
  height: 100%;
  border-radius: 2px;
  transition: width 0.5s cubic-bezier(0.4, 0, 0.2, 1);
  box-shadow: 0 0 6px currentColor;
}
.score-num { color: var(--text); width: 20px; text-align: right; font-size: 10px; }
.nd-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 12px;
  padding: 6px 0;
  border-bottom: 1px solid rgba(255,255,255,0.1);
}
.nd-row .k { color: var(--text); font-family: var(--mono); font-size: 11px; letter-spacing: 0.06em; }
.nd-row .v { color: var(--accent); text-align: right; font-family: var(--mono); font-size: 11px; font-weight: 600; }
.nd-gap-text {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--text);
  line-height: 1.75;
  max-height: 160px;
  overflow-y: auto;
  padding-right: 6px;
  scrollbar-width: thin;
  scrollbar-color: var(--border2) transparent;
}
.nd-gap-text::-webkit-scrollbar { width: 3px; }
.nd-gap-text::-webkit-scrollbar-thumb { background: var(--border2); }
.nd-tags    { display: flex; flex-wrap: wrap; gap: 4px; margin-top: 5px; }
.nd-tag {
  padding: 2px 7px;
  background: var(--bg3);
  border: 1px solid var(--border2);
  font-family: var(--mono);
  font-size: 9px;
  color: var(--muted);
}
.btn-study {
  display: block;
  width: 100%;
  margin-top: 16px;
  padding: 10px 14px;
  background: none;
  border: 1px solid var(--gold2);
  color: var(--gold);
  font-family: var(--orbitron);
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 2px;
  cursor: pointer;
  text-align: center;
  transition: background 0.14s, border-color 0.14s;
}
.btn-study:hover { background: rgba(180,140,0,0.1); border-color: var(--gold); }

#pc-study .panel { padding: 16px; }

.panel-intro { margin-bottom: 1.5rem; }
.panel-title {
  font-family: var(--orbitron);
  font-size: 1.1rem;
  font-weight: 900;
  color: var(--text2);
  letter-spacing: 0.06em;
  padding-bottom: 0.5rem;
  margin-bottom: 0.5rem;
  border-bottom: 1px solid var(--border2);
}
.panel-desc { color: var(--muted2); font-size: 0.875rem; line-height: 1.65; }

.curr-section { margin-bottom: 2rem; }
.curr-section-heading {
  font-family: var(--mono);
  font-size: 0.58rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--accent2);
  display: flex; align-items: center; gap: 0.55rem;
  margin-bottom: 0.9rem;
}
.curr-section-heading::before { content: '◆'; font-size: 0.42rem; opacity: 0.85; }
.curr-section-heading::after  { content: ''; flex:1; height:1px; background:linear-gradient(90deg,var(--border2),transparent); }

.curr-overview   { font-size: 0.87rem; line-height: 1.7; color: var(--muted2); }
.curr-gaps-list  { padding-left: 1.2rem; list-style: disc; }
.curr-gap-item   { margin-bottom: 0.35rem; font-size: 0.8rem; color: var(--muted2); }

.gap-banner {
  display: flex; align-items: flex-start; gap: 0.9rem;
  background: rgba(168,112,32,0.06); border: 1px solid rgba(168,112,32,0.24);
  padding: 0.9rem 1.1rem; margin-bottom: 1.5rem;
  font-size: 0.83rem; line-height: 1.55; color: var(--muted2);
}
.gap-banner strong { color: var(--gap); }
.gap-banner-icon   { font-size: 1rem; color: var(--gap); flex-shrink: 0; margin-top: 1px; }
.gap-flag {
  display: inline-block;
  background: rgba(168,112,32,0.1); border: 1px solid rgba(168,112,32,0.3);
  color: var(--gap); font-family: var(--mono); font-size: 0.56rem;
  letter-spacing: 0.07em; text-transform: uppercase;
  padding: 0.07rem 0.35rem; vertical-align: middle;
}

.pt-question {
  background: rgba(255,255,255,0.03);
  border: 1px solid var(--border2);
  padding: 1rem 1.1rem;
  margin-bottom: 0.6rem;
  transition: border-color 0.12s;
}
.pt-question[data-answered] { border-color: var(--border); }
.pt-q-num  { font-family: var(--mono); font-size: 0.57rem; color: var(--accent2); letter-spacing: 0.1em; text-transform: uppercase; margin-bottom: 0.4rem; opacity: 0.75; }
.pt-q-text { font-size: 0.9rem; line-height: 1.55; margin-bottom: 0.85rem; color: var(--text); }
.pt-options { display: grid; grid-template-columns: 1fr 1fr; gap: 0.38rem; }
.pt-opt {
  background: rgba(255,255,255,0.03);
  border: 1px solid var(--border2);
  padding: 0.5rem 0.75rem; font-size: 0.82rem;
  cursor: pointer; text-align: left;
  color: var(--text); font-family: var(--body);
  transition: all 0.1s;
}
.pt-opt:hover:not(:disabled) { border-color: var(--accent); background: rgba(58,104,168,0.08); }
.pt-opt.correct { border-color: var(--accent2); background: rgba(58,104,168,0.14); color: var(--text2); }
.pt-opt.wrong   { border-color: var(--red); background: rgba(192,64,64,0.07); color: var(--red); }
.pt-opt:disabled { cursor: default; }
.pt-feedback {
  margin-top: 0.5rem; font-family: var(--mono); font-size: 0.67rem;
  color: var(--muted2); line-height: 1.5;
  border-left: 2px solid var(--border2); padding-left: 0.65rem;
}
.pt-score-card {
  background: var(--panel2);
  border: 1px solid var(--border2);
  padding: 1.75rem; text-align: center;
  margin-top: 1.25rem; position: relative; overflow: hidden;
}
.pt-score-card::before {
  content: ''; position: absolute; top: 0; left: 0; right: 0; height: 2px;
  background: linear-gradient(90deg,transparent 5%,var(--accent) 40%,rgba(144,184,220,0.65) 60%,transparent 95%);
}
.pt-score-num   { font-family: var(--orbitron); font-size: 3.2rem; font-weight: 900; color: var(--text2); line-height: 1; }
.pt-score-label { color: var(--muted2); font-family: var(--mono); font-size: 0.62rem; margin-top: 0.22rem; letter-spacing: 0.1em; text-transform: uppercase; }
.pt-score-msg   { margin-top: 0.75rem; font-size: 0.875rem; color: var(--muted2); }
.btn-to-study {
  margin-top: 1.1rem;
  background: linear-gradient(180deg,#3a7ad0,#2a5aa0); color: #fff;
  font-family: var(--orbitron); font-size: 0.6rem; font-weight: 700;
  letter-spacing: 0.14em; text-transform: uppercase;
  border: none; padding: 0.6rem 1.6rem; cursor: pointer; transition: all 0.12s;
}
.btn-to-study:hover { background: linear-gradient(180deg,#4e8fe0,#3a70c0); }

.dict-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: 0.38rem;
}
.dict-card {
  background: rgba(255,255,255,0.03);
  border: 1px solid var(--border2);
  border-left: 2px solid transparent;
  padding: 0.75rem 0.9rem; transition: all 0.1s;
}
.dict-card:hover { border-color: var(--border2); border-left-color: var(--accent); }
.dict-card.is-gap { border-color: rgba(168,112,32,0.2); }
.dict-term { font-family: var(--mono); font-size: 0.73rem; color: var(--accent2); margin-bottom: 0.25rem; display: flex; align-items: center; gap: 0.36rem; flex-wrap: wrap; }
.dict-def  { font-size: 0.77rem; color: var(--muted2); line-height: 1.45; }

.people-list { display: flex; flex-direction: column; gap: 0.38rem; }
.person-card {
  background: rgba(255,255,255,0.03);
  border: 1px solid var(--border2);
  border-left: 2px solid transparent;
  padding: 0.75rem 0.9rem;
  display: flex; align-items: flex-start; gap: 0.85rem; transition: all 0.1s;
}
.person-card:hover { border-left-color: var(--accent); }
.person-card.is-gap { border-color: rgba(168,112,32,0.2); }
.person-avatar {
  width: 30px; height: 30px;
  background: var(--bg3); border: 1px solid var(--border2);
  display: flex; align-items: center; justify-content: center;
  font-family: var(--orbitron); font-size: 0.56rem; font-weight: 700;
  color: var(--accent2); flex-shrink: 0;
}
.person-name { font-size: 0.85rem; font-weight: 600; margin-bottom: 0.12rem; color: var(--text); }
.person-desc { font-size: 0.75rem; color: var(--muted2); line-height: 1.45; }

.timeline-list { position: relative; padding-left: 1.4rem; }
.timeline-list::before { content: ''; position: absolute; left: 3px; top: 6px; bottom: 0; width: 1px; background: var(--border2); }
.tl-item { position: relative; padding-bottom: 1.1rem; }
.tl-dot  { position: absolute; left: -1.46rem; top: 5px; width: 6px; height: 6px; background: var(--mint2); }
.tl-item.is-gap .tl-dot { background: var(--gap); }
.tl-date       { font-family: var(--mono); font-size: 0.64rem; color: var(--accent2); margin-bottom: 0.18rem; letter-spacing: 0.05em; }
.tl-event      { font-size: 0.83rem; line-height: 1.5; color: var(--text); }
.tl-event-note { font-size: 0.71rem; color: var(--muted2); margin-top: 0.12rem; }

.fc-header { display: flex; align-items: center; justify-content: space-between; margin-bottom: 1.2rem; }
.fc-counter { font-family: var(--mono); font-size: 0.67rem; color: var(--muted2); }
.fc-tally   { font-family: var(--mono); font-size: 0.67rem; }
.fc-tally .knew   { color: var(--accent2); }
.fc-tally .missed { color: var(--red); margin-left: 0.7rem; }

.fc-scene   { perspective: 1100px; margin: 0 auto 1.2rem; cursor: pointer; user-select: none; }
.fc-inner   { position: relative; width: 100%; padding-top: 56%; transform-style: preserve-3d; transition: transform 0.42s cubic-bezier(0.4,0,0.2,1); }
.fc-inner.flipped { transform: rotateY(180deg); }
.fc-face    { position: absolute; inset: 0; backface-visibility: hidden; display: flex; flex-direction: column; align-items: center; justify-content: center; padding: 1.5rem; text-align: center; overflow: auto; }
.fc-face.front { background: var(--panel2); border: 1px solid var(--border2); }
.fc-face.back  { background: linear-gradient(180deg,#1a2a44,#101c30); border: 1px solid var(--accent); transform: rotateY(180deg); }
.fc-face-label { font-family: var(--orbitron); font-size: 0.5rem; letter-spacing: 0.16em; text-transform: uppercase; color: var(--muted); margin-bottom: 0.7rem; }
.fc-text       { font-size: 0.94rem; line-height: 1.55; color: var(--text); }
.fc-face.back .fc-text { color: var(--silver2); }
.fc-face.back .fc-face-label { color: var(--accent2); }
.fc-type-badge { position: absolute; top: 0.65rem; right: 0.75rem; font-family: var(--mono); font-size: 0.54rem; letter-spacing: 0.07em; text-transform: uppercase; padding: 0.08rem 0.34rem; border: 1px solid var(--border2); color: var(--muted); }
.fc-tap-hint   { position: absolute; bottom: 0.65rem; font-family: var(--mono); font-size: 0.55rem; color: var(--muted); letter-spacing: 0.07em; animation: blink 2.2s ease-in-out infinite; }
.fc-gap-indicator { position: absolute; top: 0.7rem; left: 0.8rem; }
@keyframes blink { 0%,100%{opacity:1} 50%{opacity:0.18} }

.fc-nav { display: flex; align-items: center; justify-content: center; gap: 0.7rem; flex-wrap: wrap; }
.btn-fc {
  background: rgba(8,12,22,0.88); border: 1px solid var(--border2);
  color: var(--text); font-family: var(--mono); font-size: 0.63rem;
  padding: 0.43rem 0.9rem; cursor: pointer; transition: all 0.1s;
}
.btn-fc:hover     { border-color: var(--accent); }
.btn-fc.knew      { border-color: rgba(58,104,168,0.5); color: var(--accent2); }
.btn-fc.missed    { border-color: rgba(192,64,64,0.4); color: var(--red); }
.fc-done          { text-align: center; padding: 2.5rem 1rem; }
.fc-done-score    { font-family: var(--orbitron); font-size: 3.2rem; font-weight: 900; color: var(--text2); line-height: 1; }
.fc-done-label    { font-family: var(--mono); font-size: 0.65rem; color: var(--muted2); margin: 0.28rem 0 1.2rem; letter-spacing: 0.08em; }
.fc-done-msg      { font-size: 0.875rem; color: var(--muted2); margin-bottom: 1.2rem; }
.btn-restart {
  background: linear-gradient(180deg,#3a7ad0,#2a5aa0); color: #fff;
  font-family: var(--orbitron); font-size: 0.6rem; font-weight: 700;
  letter-spacing: 0.12em; text-transform: uppercase;
  border: none; padding: 0.55rem 1.4rem; cursor: pointer; transition: all 0.12s;
}
.btn-restart:hover { background: linear-gradient(180deg,#4e8fe0,#3a70c0); }
.btn-restart.btn-sec { background: var(--bg3); border: 1px solid var(--border2); color: var(--text); }
.btn-restart.btn-sec:hover { border-color: var(--accent); background: rgba(58,104,168,0.08); }

.quiz-start-screen > p { color: var(--muted2); font-size: 0.875rem; margin-bottom: 2rem; line-height: 1.65; }
.tier-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.75rem;
}
.tier-card {
  background: rgba(255,255,255,0.03);
  border: 1px solid var(--border2);
  padding: 1.2rem 0.85rem; text-align: center;
  cursor: pointer; transition: all 0.16s; position: relative; overflow: hidden;
}
.tier-card::before { content: ''; position: absolute; top: 0; left: 0; right: 0; height: 2px; }
.tier-card.novice::before        { background: var(--novice); }
.tier-card.intermediate::before  { background: var(--inter); }
.tier-card.expert::before        { background: #fff; }
.tier-card:hover { border-color: var(--accent); transform: translateY(-2px); }
.tier-icon  { font-size: 1.3rem; margin-bottom: 0.5rem; color: var(--muted2); }
.tier-name  { font-family: var(--orbitron); font-size: 0.63rem; font-weight: 700; letter-spacing: 0.14em; text-transform: uppercase; margin-bottom: 0.25rem; }
.tier-card.novice       .tier-name { color: var(--novice); }
.tier-card.intermediate .tier-name { color: var(--inter); }
.tier-card.expert       .tier-name { color: #fff; }
.tier-count { font-family: var(--mono); font-size: 0.6rem; color: var(--muted); margin-bottom: 0.4rem; letter-spacing: 0.06em; }
.tier-desc  { font-size: 0.74rem; color: var(--muted2); line-height: 1.45; }
.tier-complete-mark {
  position: absolute; top: 0.5rem; right: 0.5rem;
  font-family: var(--mono); font-size: 0.5rem;
  color: var(--accent2); background: rgba(58,104,168,0.12);
  border: 1px solid rgba(58,104,168,0.4); padding: 0.07rem 0.32rem;
}
.quiz-tier-label {
  font-family: var(--orbitron); font-size: 0.53rem; font-weight: 700;
  letter-spacing: 0.14em; text-transform: uppercase;
  padding: 0.12rem 0.45rem; margin-bottom: 0.9rem; display: inline-block;
}
.quiz-tier-label.novice       { color: var(--novice); background: rgba(58,104,168,0.10); border: 1px solid rgba(58,104,168,0.35); }
.quiz-tier-label.intermediate { color: var(--inter);  background: rgba(128,180,220,0.08); border: 1px solid rgba(128,180,220,0.32); }
.quiz-tier-label.expert       { color: #fff;           background: rgba(255,255,255,0.06); border: 1px solid rgba(255,255,255,0.28); }
.quiz-progress-row { display: flex; align-items: center; gap: 0.9rem; margin-bottom: 1.25rem; }
.quiz-progress-bar  { flex: 1; height: 2px; background: var(--border); overflow: hidden; }
.quiz-progress-fill { height: 100%; background: var(--silver); transition: width 0.32s ease; }
.quiz-progress-fill.intermediate { background: var(--inter); }
.quiz-progress-fill.expert       { background: #fff; }
.quiz-q-num  { font-family: var(--mono); font-size: 0.64rem; color: var(--muted2); white-space: nowrap; }
.quiz-q-text { font-size: 0.92rem; line-height: 1.6; margin-bottom: 1rem; color: var(--text); }
.quiz-options { display: flex; flex-direction: column; gap: 0.38rem; margin-bottom: 0.9rem; }
.quiz-opt {
  background: rgba(255,255,255,0.03);
  border: 1px solid var(--border2);
  padding: 0.68rem 0.9rem; font-size: 0.875rem;
  cursor: pointer; text-align: left;
  color: var(--text); font-family: var(--body); transition: all 0.1s;
}
.quiz-opt:hover:not(:disabled) { border-color: var(--accent); background: rgba(58,104,168,0.07); }
.quiz-opt.correct { border-color: var(--accent2); background: rgba(58,104,168,0.12); color: var(--text2); }
.quiz-opt.wrong   { border-color: var(--red); background: rgba(192,64,64,0.07); color: var(--red); }
.quiz-opt:disabled { cursor: default; }
.quiz-explanation {
  background: rgba(0,0,0,0.35); padding: 0.7rem 0.88rem;
  margin-bottom: 0.9rem; font-size: 0.73rem; color: var(--muted2);
  line-height: 1.55; font-family: var(--mono);
  border-left: 2px solid var(--accent);
}
.quiz-explanation.intermediate { border-left-color: var(--inter); }
.quiz-explanation.expert       { border-left-color: #fff; }
.btn-next-q {
  background: rgba(8,12,22,0.88); border: 1px solid var(--border2);
  color: var(--text); font-family: var(--mono); font-size: 0.63rem;
  padding: 0.43rem 1.1rem; cursor: pointer; transition: all 0.12s;
}
.btn-next-q:hover { border-color: var(--accent); color: var(--accent2); }
.quiz-results  { padding: 0.5rem 0 1.5rem; }
.qr-tier-badge { margin-bottom: 1rem; }
.qr-header     { display: flex; align-items: flex-end; gap: 1.25rem; margin-bottom: 1.25rem; }
.qr-score-num  { font-family: var(--orbitron); font-size: 4rem; font-weight: 900; color: var(--text2); line-height: 1; }
.qr-score-side { padding-bottom: 0.45rem; }
.qr-score-label{ font-family: var(--mono); font-size: 0.64rem; color: var(--muted2); margin-bottom: 0.22rem; }
.qr-score-msg  { font-size: 0.875rem; color: var(--muted2); }
.qr-mastered-msg { background: rgba(58,104,168,0.10); border: 1px solid rgba(58,104,168,0.45); padding: 0.68rem 0.9rem; font-family: var(--mono); font-size: 0.73rem; color: var(--accent2); margin-bottom: 1rem; }
.qr-breakdown-title { font-family: var(--mono); font-size: 0.57rem; letter-spacing: 0.14em; text-transform: uppercase; color: var(--muted2); margin-bottom: 0.7rem; display: flex; align-items: center; gap: 0.7rem; }
.qr-breakdown-title::after { content: ''; flex: 1; height: 1px; background: var(--border2); }
.qr-item       { display: flex; align-items: flex-start; gap: 0.68rem; padding: 0.6rem 0; border-bottom: 1px solid var(--border); font-size: 0.8rem; }
.qr-item:last-child { border-bottom: none; }
.qr-icon       { font-size: 0.64rem; flex-shrink: 0; margin-top: 2px; }
.qr-icon.ok    { color: var(--accent2); }
.qr-icon.fail  { color: var(--red); }
.qr-q          { flex: 1; line-height: 1.45; color: var(--text); }
.qr-a          { font-family: var(--mono); font-size: 0.63rem; color: var(--muted); margin-top: 0.18rem; }
.qr-actions    { margin-top: 1.25rem; display: flex; gap: 0.7rem; flex-wrap: wrap; }
.btn-retry {
  background: linear-gradient(180deg,#3a7ad0,#2a5aa0); color: #fff;
  font-family: var(--orbitron); font-size: 0.6rem; font-weight: 700;
  letter-spacing: 0.12em; text-transform: uppercase;
  border: none; padding: 0.55rem 1.4rem; cursor: pointer; transition: all 0.12s;
}
.btn-retry:hover { background: linear-gradient(180deg,#4e8fe0,#3a70c0); }
.btn-sec {
  background: rgba(8,12,22,0.88); color: var(--muted2);
  font-family: var(--mono); font-size: 0.63rem;
  border: 1px solid var(--border2); padding: 0.55rem 1.1rem;
  cursor: pointer; transition: all 0.1s;
}
.btn-sec:hover { border-color: var(--accent); color: var(--accent2); }

.res-section { margin-bottom: 2rem; }
.res-section-heading {
  font-family: var(--mono); font-size: 0.57rem; letter-spacing: 0.16em;
  text-transform: uppercase; color: var(--accent2);
  display: flex; align-items: center; gap: 0.55rem; margin-bottom: 0.88rem;
}
.res-section-heading::before { content: '◆'; font-size: 0.42rem; }
.res-section-heading::after  { content: ''; flex: 1; height: 1px; background: linear-gradient(90deg,var(--border2),transparent); }
.res-list { display: flex; flex-direction: column; gap: 0.38rem; }
.res-card {
  background: rgba(255,255,255,0.03); border: 1px solid var(--border2);
  padding: 0.85rem 1rem; text-decoration: none; display: block; transition: all 0.1s;
}
.res-card:hover { border-color: var(--accent2); }
.res-card-top { display: flex; align-items: flex-start; justify-content: space-between; gap: 0.9rem; margin-bottom: 0.3rem; }
.res-title  { font-size: 0.875rem; color: var(--text); }
.res-source { font-family: var(--mono); font-size: 0.57rem; color: var(--muted2); letter-spacing: 0.08em; text-transform: uppercase; flex-shrink: 0; }
.res-desc   { font-size: 0.75rem; color: var(--muted2); line-height: 1.45; }
.courses-grid { display: grid; grid-template-columns: repeat(auto-fill,minmax(190px,1fr)); gap: 0.38rem; }
.course-card {
  background: rgba(255,255,255,0.03); border: 1px solid var(--border2);
  padding: 0.85rem 0.95rem; text-decoration: none; display: block; transition: all 0.1s;
}
.course-card:hover { border-color: var(--accent2); }
.course-platform { font-family: var(--mono); font-size: 0.56rem; color: var(--accent2); letter-spacing: 0.08em; text-transform: uppercase; margin-bottom: 0.25rem; }
.course-title    { font-size: 0.82rem; color: var(--text); line-height: 1.4; margin-bottom: 0.25rem; }
.course-desc     { font-size: 0.71rem; color: var(--muted2); line-height: 1.4; }

#edge-tooltip {
  position: fixed;
  background: var(--panel2);
  border: 1px solid var(--border2);
  padding: 5px 10px;
  font-family: var(--mono);
  font-size: 9px;
  color: var(--text);
  letter-spacing: 0.06em;
  pointer-events: none;
  z-index: 200;
  display: none;
  max-width: 240px;
  align-items: center;
  gap: 6px;
}
.et-badge {
  font-family: var(--mono);
  font-size: 8px;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  background: rgba(0,0,0,0.25);
  border: 1px solid currentColor;
  border-radius: 2px;
  padding: 1px 4px;
  flex-shrink: 0;
}
.et-pred {
  font-family: var(--mono);
  font-size: 9px;
  color: var(--silver);
  letter-spacing: 0.04em;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

#toast {
  position: fixed;
  bottom: 16px;
  left: 50%;
  transform: translateX(-50%) translateY(60px);
  background: var(--panel2);
  border: 1px solid var(--border2);
  padding: 7px 16px;
  font-family: var(--mono);
  font-size: 10px;
  color: var(--text);
  letter-spacing: 0.05em;
  z-index: 300;
  transition: transform 0.28s cubic-bezier(0.4,0,0.2,1);
  pointer-events: none;
  white-space: nowrap;
}
#toast.show { transform: translateX(-50%) translateY(0); }

.pe-nodes   { display: flex; flex-direction: column; align-items: center; gap: 6px; margin-bottom: 14px; }
.pe-node-nm {
  font-family: var(--orbitron); font-size: 10px; font-weight: 600; color: var(--text2);
  letter-spacing: 0.5px; text-align: center; padding: 7px 10px;
  border: 1px solid var(--border2); background: rgba(255,255,255,0.06); width: 100%;
  display: flex; align-items: center; justify-content: center; gap: 7px;
}
.pe-domain-dot { width: 7px; height: 7px; border-radius: 50%; flex-shrink: 0; opacity: 0.85; }
.pe-arrow   { width: 100%; text-align: center; }
.pe-predicate { font-size: 8px; letter-spacing: 1.5px; text-transform: uppercase; font-weight: 600; margin-bottom: 4px; }
.pe-arrow-line {
  width: 1px; height: 18px; margin: 0 auto;
  border-left: 1px dashed; opacity: 0.4;
}
.pe-sentence {
  padding: 11px 13px;
  background: rgba(255,255,255,0.55);
  border: 1px solid rgba(120,160,200,0.18);
  border-left: 3px solid var(--border2);
  border-radius: 3px;
  font-size: 12px;
  color: var(--text);
  line-height: 1.65;
  font-style: italic;
  margin-bottom: 12px;
}
.pe-sentence.ai { border-left-color: #2a9d8f; }
.pe-family-desc {
  font-size: 11px; color: var(--muted2); line-height: 1.65;
  margin-bottom: 12px; padding: 8px 10px;
  background: rgba(255,255,255,0.04); border-left: 2px solid var(--border2);
}
.pe-type-badge {
  display: inline-block; margin-top: 8px;
  font-family: var(--mono); font-size: 8px;
  border: 1px solid; padding: 2px 7px; letter-spacing: 1px; text-transform: uppercase;
}
.pe-study-row {
  display: flex; flex-direction: column; gap: 6px; margin-top: 14px;
}
.pe-study-btn {
  display: block; width: 100%; padding: 8px 12px;
  background: none; border: 1px solid var(--border2); color: var(--muted2);
  font-family: var(--mono); font-size: 9px; letter-spacing: 0.08em;
  cursor: pointer; text-align: left; transition: border-color 0.12s, color 0.12s;
}
.pe-study-btn:hover { border-color: var(--accent); color: var(--accent2); }

/* Semantic similarity score bar */
.pe-sim-wrap {
  margin-bottom: 14px; display: flex; flex-direction: column; gap: 5px;
}
.pe-sim-bar-bg {
  height: 5px; background: rgba(255,255,255,0.1);
  border: 1px solid rgba(255,255,255,0.15); overflow: hidden;
}
.pe-sim-bar-fill { height: 100%; transition: width 0.5s cubic-bezier(0.4,0,0.2,1); }
.pe-sim-label {
  font-family: var(--mono); font-size: 10px; letter-spacing: 0.06em;
}

@media (max-width: 768px) {
  :root {
    --hud-h:   96px;  
  }

  #hud-main {
    flex-wrap: wrap;
    height: auto;
    padding: 10px 12px 8px;
    gap: 8px;
  }
  .hud-logo { order: 1; flex: 1; }
  #hud-meta { order: 2; }
  #hud-search-wrap { order: 3; flex: 1 1 100%; max-width: none; }
  .btn-random { order: 4; }

  #detail-panel {
    top: auto;
    bottom: 0;
    right: 0;
    left: 0;
    width: 100%;
    height: 92dvh;
    border-left: none;
    border-top: 1px solid var(--border);
    transform: translateY(100%);
    transition: transform 0.28s cubic-bezier(0.4,0,0.2,1);
    border-radius: 0;
  }
  #detail-panel.open { transform: translateY(0); }

  /* Relationship ("node") view: short bottom sheet so the spotlit graph stays
     visible above it. The graph is reframed into the top region by fitGraph(). */
  #detail-panel.open.peek {
    height: 46dvh;
    box-shadow: 0 -10px 34px rgba(10, 40, 80, 0.20);
  }
  #detail-panel.open.peek #panel-body { overflow-y: auto; }

  #panel-body {
    min-height: 0;
    padding-bottom: max(16px, env(safe-area-inset-bottom, 16px));
  }

  #panel-header::before {
    content: '';
    position: absolute;
    top: 6px;
    left: 50%;
    transform: translateX(-50%);
    width: 36px; height: 3px;
    background: var(--border2);
    border-radius: 2px;
  }
  #panel-header { position: relative; padding-top: 18px; }

  .fc-inner  { padding-top: 0 !important; height: auto !important; min-height: 180px; }
  .fc-face   { position: relative; inset: auto; min-height: 180px; }
  .fc-face.back { transform: none; }
  .fc-inner.flipped .fc-face.front { display: none; }
  .fc-inner:not(.flipped) .fc-face.back { display: none; }

  .pt-options  { grid-template-columns: 1fr; }
  .tier-grid   { grid-template-columns: 1fr; }
  .dict-grid   { grid-template-columns: 1fr; }
  .courses-grid{ grid-template-columns: 1fr; }
  #pc-study .panel { padding: 12px; }
}

@media (min-width: 769px) and (max-width: 1100px) {
  :root { --panel-w: var(--panel-w-md); }
}

.btn-help {
  position: fixed;
  bottom: 22px;
  right: 22px;
  z-index: 200;
  width: 44px; height: 44px;
  border-radius: 50%;
  background: rgba(0, 80, 200, 0.25);
  border: 1.5px solid rgba(0, 160, 255, 0.6);
  color: var(--accent3);
  font-family: var(--orbitron);
  font-size: 18px;
  font-weight: 900;
  cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  box-shadow: 0 0 18px rgba(0, 130, 255, 0.35), inset 0 0 10px rgba(0, 100, 255, 0.15);
  transition: all 0.18s;
  letter-spacing: 0;
}
.btn-help:hover {
  background: rgba(0, 100, 220, 0.45);
  border-color: var(--accent2);
  color: var(--text2);
  box-shadow: 0 0 32px rgba(0, 160, 255, 0.55), inset 0 0 16px rgba(0, 120, 255, 0.2);
  transform: scale(1.08);
}
@media (max-width: 768px) {
  .btn-help { bottom: 80px; right: 12px; }
}

.help-modal {
  position: fixed;
  inset: 0;
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
}
.help-modal.hidden { display: none !important; }
.help-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.82);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
}
.help-box {
  position: relative;
  z-index: 1;
  background: #060b16;
  border: 1px solid rgba(0, 160, 255, 0.4);
  box-shadow:
    0 0 0 1px rgba(0, 80, 200, 0.2),
    0 0 60px rgba(0, 100, 255, 0.18),
    inset 0 0 40px rgba(0, 40, 100, 0.15);
  width: 100%;
  max-width: 780px;
  max-height: 88vh;
  overflow-y: auto;
  scrollbar-width: thin;
  scrollbar-color: rgba(0,140,255,0.3) transparent;
}
.help-box::-webkit-scrollbar { width: 4px; }
.help-box::-webkit-scrollbar-thumb { background: rgba(0,140,255,0.3); }

.help-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 20px;
  border-bottom: 1px solid rgba(0, 140, 255, 0.25);
  background: rgba(0, 60, 160, 0.12);
}
.help-header-title {
  font-family: var(--orbitron);
  font-size: 13px;
  font-weight: 900;
  color: var(--accent2);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  text-shadow: 0 0 20px rgba(0, 180, 255, 0.5);
}
.help-close {
  background: none;
  border: 1px solid rgba(0,140,255,0.3);
  color: var(--muted2);
  font-size: 14px;
  width: 28px; height: 28px;
  cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  transition: all 0.14s;
  font-family: var(--mono);
}
.help-close:hover { color: var(--text2); border-color: var(--accent2); }

.help-tagline {
  padding: 14px 20px;
  font-family: var(--mono);
  font-size: 12px;
  color: var(--muted2);
  line-height: 1.7;
  border-bottom: 1px solid rgba(0,100,200,0.12);
}
.help-tagline strong { color: var(--accent3); }

.help-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0;
}
@media (max-width: 600px) {
  .help-content { grid-template-columns: 1fr; }
}
.help-col {
  padding: 18px 20px;
}
.help-col + .help-col {
  border-left: 1px solid rgba(0, 100, 200, 0.16);
}
@media (max-width: 600px) {
  .help-col + .help-col { border-left: none; border-top: 1px solid rgba(0,100,200,0.16); }
}
.help-col-title {
  font-family: var(--mono);
  font-size: 9px;
  color: var(--accent2);
  letter-spacing: 1.6px;
  text-transform: uppercase;
  margin-bottom: 12px;
  padding-bottom: 7px;
  border-bottom: 1px solid rgba(0, 140, 255, 0.2);
}
.help-items { display: flex; flex-direction: column; gap: 8px; }
.help-item {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 12px;
  color: var(--muted2);
  line-height: 1.55;
}
.help-item-key {
  font-family: var(--orbitron);
  font-size: 8px;
  font-weight: 700;
  color: var(--accent2);
  border: 1px solid rgba(0,140,255,0.35);
  padding: 2px 6px;
  white-space: nowrap;
  flex-shrink: 0;
  letter-spacing: 0.08em;
  background: rgba(0,80,200,0.1);
}
.help-item strong { color: var(--text); }

.help-states { display: flex; flex-direction: column; gap: 7px; margin-top: 4px; }
.hs-row {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--mono);
  font-size: 11px;
  color: var(--muted2);
}
.hs-dot {
  display: inline-block;
  width: 12px; height: 12px;
  border-radius: 50%;
  border: 2px solid;
  flex-shrink: 0;
}
.hs-dot.untouched { background: transparent; border-color: #2a3a50; opacity: 0.6; }
.hs-dot.viewed    { background: var(--state-viewed); border-color: #3366cc; }
.hs-dot.studied   { background: var(--accent); border-color: var(--accent2); }
.hs-dot.conquered { background: var(--gold2); border-color: var(--gold); box-shadow: 0 0 8px rgba(255,215,0,0.5); }

.help-domains {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4px 12px;
}
.hd-item {
  display: flex;
  align-items: center;
  gap: 7px;
  font-family: var(--mono);
  font-size: 10px;
  color: var(--muted2);
}
.hd-swatch {
  width: 8px; height: 8px;
  border-radius: 50%;
  flex-shrink: 0;
}

/* Edge type legend */
.help-edge-types {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4px 12px;
}
.het-item {
  display: flex;
  align-items: center;
  gap: 6px;
  font-family: var(--mono);
  font-size: 10px;
  color: var(--muted2);
}
.het-swatch {
  width: 20px; height: 3px;
  border-radius: 2px;
  flex-shrink: 0;
}
.het-name {
  letter-spacing: 0.04em;
}

.help-footer {
  padding: 12px 20px;
  border-top: 1px solid rgba(0,100,200,0.16);
  font-family: var(--mono);
  font-size: 10px;
  color: var(--muted);
  text-align: center;
  letter-spacing: 0.06em;
}

.kadin-credit {
  position: fixed;
  bottom: 14px;
  left: 16px;
  z-index: 150;
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.08em;
  color: var(--muted);
  text-transform: uppercase;
  opacity: 0.72;
  pointer-events: auto;
}
.kadin-credit:hover { opacity: 1; }
.kadin-credit-label {
  white-space: nowrap;
  color: var(--muted2);
}
.kadin-credit-links {
  display: flex;
  align-items: center;
  gap: 7px;
}
.kadin-credit-links a {
  display: flex;
  align-items: center;
  opacity: 0.7;
  transition: opacity 0.15s, transform 0.15s;
  color: inherit;
}
.kadin-credit-links a:hover {
  opacity: 1;
  transform: scale(1.15);
}
@media (max-width: 768px) {
  .kadin-credit {
    bottom: max(12px, env(safe-area-inset-bottom, 12px));
    left: 12px;
    font-size: 9px;
  }
}
.help-footer span { color: var(--accent3); }

/* ── Mobile back-to-map button ── */
.btn-back-to-map {
  position: fixed;
  bottom: max(18px, env(safe-area-inset-bottom, 18px));
  left: 50%;
  transform: translateX(-50%);
  z-index: 200;
  background: rgba(255,255,255,0.92);
  border: 1.5px solid #99c4e8;
  color: #0a3a6a;
  font-family: var(--orbitron);
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.18em;
  padding: 9px 22px;
  cursor: pointer;
  box-shadow: 0 2px 16px rgba(0,80,180,0.18);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  transition: background 0.14s, border-color 0.14s, box-shadow 0.14s;
  white-space: nowrap;
  /* Only render on mobile — hidden on desktop via display:none */
  display: none;
}
@media (max-width: 768px) {
  .btn-back-to-map {
    display: block;
  }
  .btn-back-to-map.hidden {
    display: none !important;
  }
  .btn-back-to-map:active {
    background: #ddeeff;
    border-color: var(--accent);
  }
  /* Shift help button up when back button is visible */
  .btn-help { bottom: 80px; }
}

/* ════════════════════════════════════════════
   KNOWLEDGE PATH FINDER
   ════════════════════════════════════════════ */

/* ── HUD button ── */
.btn-pathfind {
  flex-shrink: 0;
  background: linear-gradient(180deg, #e8f4ff 0%, #cce4ff 100%);
  border: 1px solid var(--border3);
  color: #0055aa;
  font-family: var(--orbitron);
  font-size: 9px;
  font-weight: 700;
  letter-spacing: 0.14em;
  padding: 6px 11px;
  cursor: pointer;
  transition: all 0.15s;
  white-space: nowrap;
}
.btn-pathfind:hover { background: linear-gradient(180deg, #fff 0%, #d8eeff 100%); color: var(--accent); }
.btn-pathfind.active {
  background: linear-gradient(180deg, #003a88 0%, #001e55 100%);
  color: var(--accent); border-color: var(--accent);
}

/* ── Path Finder modal ── */
.pathfind-modal {
  position: fixed; inset: 0; z-index: 300;
  display: flex; align-items: center; justify-content: center;
}
.pathfind-backdrop {
  position: absolute; inset: 0;
  background: rgba(0,15,40,0.55);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
}
.pathfind-box {
  position: relative; z-index: 1;
  background: linear-gradient(160deg, rgba(240,249,255,0.98) 0%, rgba(220,240,255,0.96) 100%);
  border: 1px solid var(--border2);
  box-shadow: 0 8px 40px rgba(0,50,140,0.22);
  padding: 22px;
  width: min(440px, calc(100vw - 32px));
}
.pathfind-header {
  display: flex; align-items: center; justify-content: space-between;
  margin-bottom: 16px;
}
.pathfind-title {
  font-family: var(--orbitron); font-size: 11px; font-weight: 700;
  letter-spacing: 0.12em; color: #0a2a4a;
}
.pathfind-close {
  background: none; border: none; color: var(--muted);
  cursor: pointer; font-size: 16px; padding: 2px 6px;
  line-height: 1; transition: color 0.12s;
}
.pathfind-close:hover { color: var(--text); }
.pathfind-inputs { display: flex; flex-direction: column; gap: 10px; margin-bottom: 14px; }
.pf-input-group { position: relative; }
.pf-input-label {
  font-family: var(--mono); font-size: 8px; letter-spacing: 0.1em;
  text-transform: uppercase; color: var(--muted2); margin-bottom: 4px;
}
.pf-input {
  width: 100%;
  background: rgba(255,255,255,0.88);
  border: 1px solid var(--border2);
  color: var(--text2); font-family: var(--mono); font-size: 11px;
  padding: 8px 10px; outline: none; letter-spacing: 0.04em;
  transition: border-color 0.13s, background 0.13s;
}
.pf-input:focus { border-color: var(--accent); background: #fff; }
.pf-input::placeholder { color: var(--muted); }
.pf-ac-dropdown {
  position: absolute; top: calc(100% + 1px); left: 0; right: 0;
  background: rgba(240,249,255,0.99); border: 1px solid var(--border2);
  border-top: none; z-index: 10; max-height: 180px; overflow-y: auto;
}
.pf-ac-item {
  padding: 6px 10px; cursor: pointer; display: flex;
  align-items: center; gap: 8px; border-bottom: 1px solid var(--border3);
  transition: background 0.08s;
}
.pf-ac-item:hover, .pf-ac-item.sel { background: rgba(0,100,220,0.08); }
.pf-ac-name { font-family: var(--mono); font-size: 10px; color: var(--text); flex: 1; }
.pf-ac-desc { font-family: var(--mono); font-size: 8px; color: var(--muted2); white-space: nowrap; }
.pf-divider {
  display: flex; align-items: center; gap: 10px;
  font-family: var(--mono); font-size: 16px; color: var(--muted); justify-content: center;
  margin: 2px 0;
}
.btn-pathfind-go {
  width: 100%;
  background: linear-gradient(180deg, #1a66cc 0%, #0044aa 100%);
  border: 1px solid #0033aa; color: #fff;
  font-family: var(--orbitron); font-size: 10px; font-weight: 700;
  letter-spacing: 0.14em; padding: 10px; cursor: pointer; transition: all 0.15s;
}
.btn-pathfind-go:hover { background: linear-gradient(180deg, #2277ee 0%, #1155cc 100%); }
.btn-pathfind-go:disabled { opacity: 0.5; cursor: not-allowed; }

/* ── Path resume banner ── */
.path-resume-banner {
  position: fixed; top: var(--hud-h); left: 0; right: 0; z-index: 90;
  background: linear-gradient(90deg, rgba(0,55,130,0.96) 0%, rgba(0,35,90,0.96) 100%);
  border-bottom: 1px solid var(--accent); padding: 6px 14px;
  display: flex; align-items: center; gap: 10px;
  font-family: var(--mono); font-size: 9px; letter-spacing: 0.07em; color: var(--silver);
}
.path-resume-msg { flex: 1; }
.path-resume-msg strong { color: var(--accent); }
.btn-resume-path {
  background: rgba(0,200,255,0.12); border: 1px solid var(--accent);
  color: var(--accent); font-family: var(--orbitron); font-size: 8px;
  font-weight: 700; letter-spacing: 0.1em; padding: 4px 10px; cursor: pointer;
  flex-shrink: 0; transition: background 0.12s;
}
.btn-resume-path:hover { background: rgba(0,200,255,0.22); }
.btn-dismiss-resume {
  background: none; border: none; color: var(--muted); cursor: pointer;
  font-size: 14px; padding: 0 4px; line-height: 1; flex-shrink: 0;
}

/* ── Path panel (pc-pathfind) ── */
#pc-pathfind { padding: 0; overflow-y: auto; height: 100%; }
.pf-panel-header {
  padding: 12px 16px 10px;
  border-bottom: 1px solid var(--border3);
  background: rgba(255,255,255,0.3);
}
.pf-panel-route {
  font-family: var(--orbitron); font-size: 9px; font-weight: 600;
  letter-spacing: 0.08em; color: #0a2a4a;
  display: flex; align-items: center; gap: 6px; flex-wrap: wrap;
}
.pf-endpoint {
  background: rgba(255,255,255,0.7); border: 1px solid var(--border3);
  padding: 2px 7px; max-width: 44%; overflow: hidden;
  text-overflow: ellipsis; white-space: nowrap;
}
.pf-arrow { color: var(--accent); font-size: 12px; flex-shrink: 0; }

.pf-status-bar {
  padding: 6px 16px; min-height: 28px;
  display: flex; align-items: center; gap: 6px;
  border-bottom: 1px solid var(--border3);
  font-family: var(--mono); font-size: 9px;
  letter-spacing: 0.06em; color: var(--muted2);
}
.pf-status-dot {
  width: 5px; height: 5px; border-radius: 50%;
  background: var(--accent); flex-shrink: 0;
  animation: livepulse 1.1s ease-in-out infinite;
}
.pf-status-dot.done { background: #22cc66; animation: none; }

.pf-cards { padding: 8px 10px; }
.pf-no-path {
  font-family: var(--mono); font-size: 9px; color: var(--muted);
  padding: 10px 6px; letter-spacing: 0.04em;
}

/* ── Path card ── */
.pf-path-card {
  border: 1px solid var(--border3);
  background: rgba(255,255,255,0.42);
  margin-bottom: 7px; padding: 9px 11px;
  transition: background 0.12s;
}
.pf-path-card:hover { background: rgba(255,255,255,0.62); }
.pf-card-header {
  display: flex; align-items: center; gap: 7px; margin-bottom: 7px;
}
.pf-card-dot {
  width: 8px; height: 8px; border-radius: 50%; flex-shrink: 0;
}
.pf-card-type {
  font-family: var(--orbitron); font-size: 8px; font-weight: 700;
  letter-spacing: 0.12em; text-transform: uppercase; flex: 1;
}
.pf-card-hops {
  font-family: var(--mono); font-size: 8px; color: var(--muted2);
  letter-spacing: 0.05em;
}
.pf-card-chain {
  display: flex; align-items: center; flex-wrap: wrap; gap: 3px;
  margin-bottom: 7px;
}
.pf-chain-node {
  font-family: var(--mono); font-size: 8px; letter-spacing: 0.03em;
  background: rgba(255,255,255,0.75); border: 1px solid var(--border2);
  padding: 2px 5px; color: var(--text); cursor: pointer;
  transition: background 0.1s; max-width: 110px;
  overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
}
.pf-chain-node:hover { background: rgba(0,100,220,0.1); }
.pf-chain-node.endpoint { font-weight: bold; border-width: 1.5px; }
.pf-chain-arrow { font-size: 9px; color: var(--muted2); flex-shrink: 0; }
.pf-card-summary {
  font-family: var(--mono); font-size: 8px; color: var(--muted2);
  letter-spacing: 0.03em; font-style: italic;
  overflow: hidden; text-overflow: ellipsis;
  display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical;
}

/* ── Exit button ── */
.pf-exit-wrap {
  padding: 10px 16px 14px;
  border-top: 1px solid var(--border3);
  position: sticky; bottom: 0;
  background: linear-gradient(0deg, rgba(220,238,255,0.98) 0%, rgba(220,238,255,0.92) 100%);
}
.btn-pf-exit {
  width: 100%; background: none;
  border: 1px solid var(--border3); color: var(--muted2);
  font-family: var(--orbitron); font-size: 8px; font-weight: 700;
  letter-spacing: 0.12em; padding: 8px; cursor: pointer;
  transition: all 0.14s;
}
.btn-pf-exit:hover { border-color: var(--accent); color: var(--accent); }