:root {
  --bg: #000000;
  --text: #f0f0f0;
  --muted: #b3b3b3;
  --border: #444444;
  --panel: #1f1f1f;
  --panel-strong: #161616;
  --line: #f5f5f5;
  --danger: #ff4d4d;
  --button: #1a1a1a;
  --button-hover: #262626;
  --accent: #66c2ff;
  --accent-glow: rgba(102, 194, 255, 0.3);
  --emergent-bg: #d6b484;
  --emergent-text: #0f0f0f;
  --emergent-border: #b07a37;
  --connection-obligate: #ff3b30;
  --connection-influence: #f5f5f5;
  --panel-overlay: rgba(22, 22, 22, 0.9);
  --label-bg: rgba(0, 0, 0, 0.55);
  --label-text: #f0f0f0;
  --label-border: #bfbfbf;
  --demarcation-line: #c6c6c6;
}

body.light-mode {
  --bg: #f7f1e3;
  --text: #111111;
  --muted: #4f493f;
  --border: #d3c4ae;
  --panel: #fffaf1;
  --panel-strong: #efe2d1;
  --line: #2f2619;
  --danger: #c44036;
  --button: #f0e5d6;
  --button-hover: #e2d4c2;
  --accent: #c56a1c;
  --accent-glow: rgba(197, 106, 28, 0.3);
  --emergent-bg: #f1d6ad;
  --emergent-text: #2c1d10;
  --emergent-border: #c48b3a;
  --connection-obligate: #c44036;
  --connection-influence: #2f2619;
  --panel-overlay: rgba(255, 250, 241, 0.92);
  --label-bg: rgba(255, 255, 255, 0.78);
  --label-text: #2c261b;
  --label-border: #c7b9a3;
  --demarcation-line: #c7b9a3;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
}

header {
  padding: 12px 16px;
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  background: var(--bg);
  z-index: 10;
}

.title {
  font-size: 18px;
  font-weight: bold;
}

.controls {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-top: 6px;
  flex-wrap: wrap;
}

.controls button {
  background: var(--button);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 6px 10px;
  font-weight: bold;
  cursor: pointer;
}

.controls button:hover {
  background: var(--button-hover);
}

.controls .home-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--button);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 6px 10px;
  font-weight: bold;
  text-decoration: none;
}

.controls .home-link:hover {
  background: var(--button-hover);
}

.scale-control {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  color: var(--muted);
}

#time-scale {
  width: 140px;
}

#status {
  color: var(--muted);
  font-size: 13px;
}

.instructions {
  margin-top: 6px;
  color: var(--muted);
  font-size: 13px;
}

.toggles {
  margin-top: 8px;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  color: var(--muted);
  font-size: 13px;
}

.toggles label {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  cursor: pointer;
}

.toggles input {
  accent-color: var(--accent);
}

main {
  padding: 8px 12px 16px;
  display: block;
  position: relative;
}

#viewport {
  flex: 1;
  min-width: 0;
  position: relative;
  height: calc(100vh - 140px);
  min-height: 720px;
  border: 1px solid var(--border);
  overflow: auto;
  background: var(--bg);
}

#workspace {
  position: relative;
  transform-origin: top left;
}

#details-panel {
  width: 320px;
  min-height: 160px;
  padding: 12px;
  background: var(--panel-overlay);
  border: 1px solid var(--border);
  border-radius: 10px;
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.45);
  position: fixed;
  top: 92px;
  right: 16px;
  backdrop-filter: blur(4px);
  z-index: 20;
}

#details-panel.hidden {
  display: none;
}

.details-title {
  font-size: 15px;
  font-weight: bold;
  margin-bottom: 8px;
}

.details-body {
  font-size: 13px;
  color: var(--muted);
  line-height: 1.5;
}

.qual-text {
  margin-bottom: 10px;
  color: var(--muted);
}

.reading-section {
  margin-top: 8px;
}

.reading-heading {
  font-weight: 700;
  color: var(--text);
  margin-bottom: 6px;
}

.reading-subheading {
  font-weight: 600;
  margin-top: 6px;
  margin-bottom: 4px;
  color: var(--text);
}

.reading-section ul {
  margin: 0 0 6px 16px;
  padding: 0;
  color: var(--muted);
  font-size: 12px;
  line-height: 1.4;
}

#connections,
#nodes {
  position: absolute;
  top: 0;
  left: 0;
}

#connections {
  overflow: visible;
  z-index: 1;
}

#workspace.connections-hidden #connections,
#workspace.connections-hidden #connections line,
#workspace.connections-hidden #connections .connection-hit,
#workspace.connections-hidden #connections .connection-label {
  display: none;
}

#workspace.scaled #connections,
#workspace.scaled #nodes,
#workspace.scaled #demarcations,
#workspace.scaled #groups {
  transform-origin: top left;
}

#demarcations {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  pointer-events: none;
  z-index: 0;
}

#groups {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  pointer-events: none;
  z-index: 3;
}

#demarcations .band {
  position: absolute;
  left: 0;
  right: 0;
  pointer-events: none;
}

.demarcation-label {
  position: absolute;
  left: 12px;
  padding: 4px 10px;
  background: var(--label-bg);
  border: 1px solid var(--label-border);
  border-radius: 8px;
  font-size: 22px;
  font-weight: 800;
  color: var(--label-text);
}

#nodes {
  z-index: 2;
}

.node {
  position: absolute;
  width: 220px;
  min-height: 90px;
  background: var(--panel);
  border: 1px solid var(--border);
  padding: 10px 12px 12px;
  user-select: none;
  cursor: grab;
  color: var(--text);
  transition: box-shadow 120ms ease, border-color 120ms ease, transform 60ms ease;
}

.node:active {
  cursor: grabbing;
}

.node.selected {
  border-color: var(--accent);
  box-shadow: 0 0 0 2px var(--accent), 0 10px 22px rgba(0, 0, 0, 0.45),
    0 0 16px var(--accent-glow);
  background: linear-gradient(135deg, rgba(102, 194, 255, 0.12), transparent),
    var(--panel);
}

.node.neighbor {
  border-color: var(--accent);
  box-shadow: 0 0 0 1px var(--accent), 0 0 12px var(--accent-glow);
}

.node.emergent {
  width: 170px;
  min-height: 170px;
  border-radius: 999px;
  border: 2px solid var(--emergent-border);
  background: var(--emergent-bg);
  color: var(--emergent-text);
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 4px;
  padding: 12px;
  box-shadow: 0 0 18px rgba(0, 0, 0, 0.38);
}

.node.emergent .subtitle,
.node.emergent .date,
.node.emergent .resources,
.node.emergent .labor {
  color: var(--emergent-text);
}

.node.emergent .title,
.node.emergent .subtitle {
  margin: 0;
}

.node.emergent.selected,
.node.emergent.neighbor {
  box-shadow: 0 0 0 2px var(--accent), 0 0 16px var(--accent-glow);
}

.node.emergent .handles .handle {
  background: var(--emergent-bg);
  border-color: var(--emergent-border);
}

.node .title {
  font-size: calc(15px * var(--label-scale, 1));
  font-weight: bold;
  margin-bottom: 4px;
}

.node .subtitle {
  font-size: 12px;
  color: var(--muted);
  margin-bottom: 4px;
}

.node .date {
  font-size: 12px;
  color: var(--muted);
}

.node .resources {
  margin-top: 6px;
  font-size: 12px;
  color: var(--muted);
  line-height: 1.4;
}

.node .labor {
  margin-top: 6px;
  font-size: 12px;
  color: var(--muted);
  line-height: 1.4;
}

.handles {
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
  width: 20px;
  height: 12px;
  display: flex;
  justify-content: center;
  align-items: center;
}

.handle {
  width: 10px;
  height: 10px;
  border-radius: 5px;
  background: var(--panel);
  border: 1px solid var(--text);
  cursor: crosshair;
}

.handles.top {
  top: -14px;
}

.handles.bottom {
  bottom: -14px;
}

line.connection {
  stroke: var(--connection-influence);
  stroke-width: 2px;
  cursor: pointer;
  pointer-events: none;
  stroke-linecap: round;
  transition: opacity 1050ms ease-in-out, stroke-width 140ms ease-in-out, filter 140ms ease-in-out;
}

line.connection.obligate {
  stroke: var(--connection-obligate);
}

line.connection.influence {
  stroke: var(--connection-influence);
}

line.connection:hover {
  stroke-width: 3px;
  filter: drop-shadow(0 0 6px var(--accent-glow));
}

line.connection-hit {
  stroke: transparent;
  stroke-width: 12px;
  cursor: pointer;
  pointer-events: stroke;
  transition: opacity 1050ms ease-in-out;
}

.connection.adjacent {
  stroke-width: 3px;
  filter: drop-shadow(0 0 10px rgba(102, 194, 255, 0.55));
}

line.temp {
  stroke: var(--line);
  stroke-width: 2px;
  stroke-dasharray: 6 4;
  pointer-events: none;
}

.connection-label {
  font-size: 20px;
  fill: var(--muted);
  stroke: var(--bg);
  stroke-width: 2px;
  paint-order: stroke;
  pointer-events: none;
  transition: opacity 1050ms ease-in-out;
}

.connection-hidden {
  opacity: 0;
  pointer-events: none;
}

.demarcation-line {
  position: absolute;
  left: 0;
  right: 0;
  height: 0;
  border-top: 5px solid var(--demarcation-line);
}

.time-line {
  position: absolute;
  left: 0;
  right: 0;
  height: 0;
  border-top: 2px dashed var(--demarcation-line);
  opacity: 0.4;
}

.time-label {
  position: absolute;
  left: 12px;
  padding: 4px 12px;
  font-size: 26px;
  font-weight: 800;
  color: var(--label-text);
  background: var(--label-bg);
  border: 1px solid var(--label-border);
  border-radius: 6px;
  pointer-events: none;
}

.selection-box {
  position: absolute;
  border: 1px dashed var(--accent);
  background: rgba(102, 194, 255, 0.12);
  pointer-events: none;
  z-index: 3;
}

.group-box {
  position: absolute;
  border: 5px solid var(--accent);
  border-radius: 12px;
  background: transparent;
  pointer-events: none;
  box-sizing: border-box;
}

.group-box .group-header {
  position: absolute;
  top: -18px;
  left: 50%;
  transform: translateX(-50%) scale(var(--group-scale, 1));
  transform-origin: top center;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 10px;
  border-radius: 999px;
  font-size: 14px;
  font-weight: 800;
  color: var(--label-text);
  background: var(--label-bg);
  border: 1px solid var(--label-border);
  pointer-events: auto;
  cursor: grab;
}

.group-box .group-header:active {
  cursor: grabbing;
}

.group-box .group-delete {
  pointer-events: auto;
  background: transparent;
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--label-text);
  font-size: 12px;
  padding: 2px 6px;
  cursor: pointer;
}

.group-box .group-delete:hover {
  background: var(--button-hover);
}

.group-box .group-resize {
  position: absolute;
  right: -8px;
  bottom: -8px;
  width: 18px;
  height: 18px;
  border-radius: 4px;
  border: 2px solid var(--border);
  background: var(--panel);
  cursor: se-resize;
  pointer-events: auto;
}