:root {
  --bg: #ffffff;
  --text: #111111;
  --muted-text: #444444;
  --panel-bg: rgba(255, 255, 255, 0.95);
  --panel-border: #dddddd;
  --panel-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
  --input-bg: #ffffff;
  --input-border: #cccccc;
  --button-bg: #ffffff;
  --button-border: #bbbbbb;
  --button-text: #111111;
  --svg-border: #000000;
  --tooltip-bg: #ffffff;
  --tooltip-border: #dddddd;
  --tooltip-text: #111111;
  --khop-bg: #ffffff;
  --khop-border: #dddddd;
  --overlay-bg: rgba(0, 0, 0, 0.55);
  --ego-card-bg: #ffffff;
  --ego-card-border: #eeeeee;
  --ego-canvas-bg: #fafafa;
  --label-fill: #222222;
  --label-stroke: #ffffff;
  --link-stroke: #9aa0a6;
  --ring-stroke: #e5e7eb;
}

body.dark-mode {
  --bg: #111827;
  --text: #f3f4f6;
  --muted-text: #d1d5db;
  --panel-bg: rgba(31, 41, 55, 0.96);
  --panel-border: #374151;
  --panel-shadow: 0 8px 24px rgba(0, 0, 0, 0.35);
  --input-bg: #1f2937;
  --input-border: #4b5563;
  --button-bg: #1f2937;
  --button-border: #4b5563;
  --button-text: #f3f4f6;
  --svg-border: #4b5563;
  --tooltip-bg: #1f2937;
  --tooltip-border: #4b5563;
  --tooltip-text: #f3f4f6;
  --khop-bg: #1f2937;
  --khop-border: #4b5563;
  --overlay-bg: rgba(0, 0, 0, 0.72);
  --ego-card-bg: #111827;
  --ego-card-border: #374151;
  --ego-canvas-bg: #0f172a;
  --label-fill: #f3f4f6;
  --label-stroke: #111827;
  --link-stroke: #94a3b8;
  --ring-stroke: #475569;
}

html,
body {
  height: 100%;
  margin: 0;
}

body {
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100vh;
  width: 100%;
  background: var(--bg);
  color: var(--text);
  transition:
    background 0.2s ease,
    color 0.2s ease;
}

svg {
  display: block;
  border: 1px solid var(--svg-border);
  background: var(--bg);
}

line {
  stroke: #aaa;
}

circle {
  fill: magenta;
  stroke: #fff;
  stroke-width: 4.3px;
}

text {
  font-family: Arial, sans-serif;
  font-size: 23px;
  pointer-events: none;
}

.ui-bar {
  position: fixed;
  left: 10px;
  top: 10px;
  display: inline-flex;
  gap: 8px;
  align-items: center;
  flex-wrap: wrap;
  background: var(--panel-bg);
  border: 1px solid var(--panel-border);
  padding: 8px 10px;
  border-radius: 8px;
  box-shadow: var(--panel-shadow);
  font:
    14px system-ui,
    sans-serif;
  z-index: 20;
  color: var(--text);
  transition:
    background 0.2s ease,
    border-color 0.2s ease,
    color 0.2s ease;
}

.ui-bar label {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  color: var(--text);
}

.ui-bar input[type="text"],
.ui-bar input[type="number"] {
  padding: 6px 8px;
  border: 1px solid var(--input-border);
  border-radius: 6px;
  background: var(--input-bg);
  color: var(--text);
}

.ui-bar input::placeholder {
  color: var(--muted-text);
}

.ui-bar button {
  padding: 6px 10px;
  border: 1px solid var(--button-border);
  background: var(--button-bg);
  color: var(--button-text);
  border-radius: 6px;
  cursor: pointer;
}

#khopMenu {
  position: fixed;
  z-index: 25;
  display: none;
  background: var(--khop-bg);
  border: 1px solid var(--khop-border);
  border-radius: 8px;
  padding: 10px;
  box-shadow: 0 6px 18px rgba(0, 0, 0, 0.14);
  width: 300px;
  font:
    14px system-ui,
    sans-serif;
  color: var(--text);
}

#khopMenu .title {
  font-weight: 600;
  margin-bottom: 6px;
}

#khopMenu .row {
  display: flex;
  align-items: center;
  gap: 8px;
  margin: 8px 0px 0px;
}

#khopMenu input[type="number"] {
  padding: 6px 8px;
  border: 1px solid var(--input-border);
  border-radius: 6px;
  background: var(--input-bg);
  color: var(--text);
}

#khopMenu button {
  padding: 6px 10px;
  border: 1px solid var(--button-border);
  background: var(--button-bg);
  color: var(--button-text);
  border-radius: 6px;
  cursor: pointer;
}

#egoOverlay {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 1000;
  background: var(--overlay-bg);
}

#egoCard {
  position: absolute;
  inset: 5% 4%;
  background: var(--ego-card-bg);
  border-radius: 12px;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.35);
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

#egoHeader {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 14px;
  border-bottom: 1px solid var(--ego-card-border);
  color: var(--text);
}

#egoTitle {
  font: 600 14px system-ui;
}

#egoActions {
  margin-left: auto;
  display: flex;
  gap: 8px;
  align-items: center;
}

#egoActions button {
  padding: 6px 10px;
  border: 1px solid var(--button-border);
  background: var(--button-bg);
  color: var(--button-text);
  border-radius: 6px;
  cursor: pointer;
}

#egoCanvas {
  flex: 1;
  background: var(--ego-canvas-bg);
}

.node.dim {
  opacity: 0.15;
}

.label.dim {
  opacity: 0.1;
}

.link.dim {
  opacity: 0.05;
}

.node.match {
  stroke: #111;
  stroke-width: 2.5px;
}

body.dark-mode .node.match {
  stroke: #f9fafb;
}

.label.match {
  font-weight: 700;
}

.link.match {
  stroke-opacity: 0.9;
}

.hidden {
  display: none;
}