:root {
  --bg: #020617;
  --grid: rgba(148, 163, 184, 0.08);
  --node-bg: rgba(15, 23, 42, 0.85);
  --node-border: #1e293b;
  --accent: #22d3ee;
  --accent-2: #10b981;
  --warm: #fbbf24;
  --danger: #fb7185;
  --text: #e2e8f0;
  --muted: #94a3b8;
  --node-w: 360px;
}

* { box-sizing: border-box; }
html, body {
  margin: 0;
  padding: 0;
  width: 100vw;
  height: 100vh;
  background: var(--bg);
  color: var(--text);
  font-family: ui-sans-serif, system-ui, -apple-system, "Segoe UI", sans-serif;
  overflow: hidden;
  overscroll-behavior: none;
}

#viewport {
  position: fixed;
  inset: 0;
  touch-action: none;
  cursor: grab;
  background:
    radial-gradient(circle at 50% 0%, rgba(34, 211, 238, 0.06), transparent 60%),
    var(--bg);
}
#viewport.panning { cursor: grabbing; }

#world {
  position: absolute;
  left: 0;
  top: 0;
  width: 1px;
  height: 1px;
  transform-origin: 0 0;
  will-change: transform;
}

#world::before {
  content: "";
  position: absolute;
  left: -10000px;
  top: -10000px;
  width: 20000px;
  height: 20000px;
  background-image:
    linear-gradient(var(--grid) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid) 1px, transparent 1px);
  background-size: 40px 40px;
  pointer-events: none;
}

#connectors {
  position: absolute;
  left: -10000px;
  top: -10000px;
  width: 20000px;
  height: 20000px;
  pointer-events: none;
  overflow: visible;
}

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

.node {
  position: absolute;
  width: var(--node-w);
  background: var(--node-bg);
  border: 1px solid var(--node-border);
  border-radius: 12px;
  padding: 14px 16px;
  backdrop-filter: blur(6px);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.4);
  transition: border-color 0.2s, box-shadow 0.2s, opacity 0.2s;
  cursor: move;
  touch-action: none;
}
.node textarea, .node input[type="file"] { cursor: text; }
.node textarea { cursor: text; }
.node button, .node a, .node .choice, .node .dropzone { cursor: pointer; }

.node.dragging {
  z-index: 10;
  cursor: grabbing;
  box-shadow:
    0 0 0 1px var(--accent),
    0 20px 60px rgba(34, 211, 238, 0.35);
  transition: none;
}

/* Top (in) and bottom (out) connection dots — interactive: drag from out
   to another node's in to wire them up. */
.dot {
  position: absolute;
  left: 50%;
  width: 12px;
  height: 12px;
  margin-left: -6px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow:
    0 0 6px var(--accent),
    0 0 14px rgba(34, 211, 238, 0.5);
  opacity: 0.5;
  z-index: 3;
  cursor: crosshair;
  touch-action: none;
  transition: opacity 0.15s, transform 0.15s, box-shadow 0.15s;
}
.dot.in  { top: -6px; }
.dot.out { bottom: -6px; }
.dot:hover {
  opacity: 1;
  transform: scale(1.25);
  box-shadow: 0 0 10px var(--accent), 0 0 22px rgba(34, 211, 238, 0.75);
}

.node[data-status="active"] .dot.out {
  opacity: 0.9;
  animation: dotPulse 1.8s ease-in-out infinite;
}
.node[data-status="completed"] .dot {
  opacity: 0.35;
}
@keyframes dotPulse {
  0%, 100% {
    opacity: 0.55;
    box-shadow: 0 0 6px var(--accent), 0 0 14px rgba(34, 211, 238, 0.5);
  }
  50% {
    opacity: 1;
    box-shadow: 0 0 10px var(--accent), 0 0 22px rgba(34, 211, 238, 0.75);
  }
}

/* While the user is dragging a wire, highlight every input dot as a
   target and dim the rest of the canvas slightly. */
body.wiring .dot.in {
  opacity: 0.95;
  animation: dotPulse 1s ease-in-out infinite;
}
body.wiring { cursor: crosshair; }

.ghost-wire {
  fill: none;
  stroke: var(--accent);
  stroke-width: 2;
  stroke-dasharray: 6 4;
  stroke-linecap: round;
  filter: drop-shadow(0 0 6px rgba(34, 211, 238, 0.7));
  pointer-events: none;
}
.node[data-status="active"] {
  border-color: var(--accent);
  box-shadow: 0 0 0 1px var(--accent), 0 10px 40px rgba(34, 211, 238, 0.18);
}
.node[data-status="completed"] { opacity: 0.78; }
.node[data-status="completed"] .node-title::before {
  content: "✓ ";
  color: var(--accent-2);
}

.node-kind {
  display: inline-block;
  font-size: 10px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--muted);
  background: rgba(148, 163, 184, 0.08);
  padding: 2px 6px;
  border-radius: 999px;
  margin-bottom: 6px;
}
.node-title {
  margin: 0 0 6px;
  font-size: 16px;
  font-weight: 600;
  color: var(--text);
}
.node-body {
  font-size: 14px;
  line-height: 1.5;
  color: var(--muted);
}
.node-body p { margin: 0 0 8px; }
.node-body p:last-child { margin-bottom: 0; }

.node[data-kind="ai-message"]    { border-left: 3px solid var(--accent); }
.node[data-kind="ai-question"]   { border-left: 3px solid var(--warm); }
.node[data-kind="user-input"] {
  border-left: 3px solid var(--muted);
  background: rgba(30, 41, 59, 0.85);
}
.node[data-kind="automation"]    { border-left: 3px solid var(--accent-2); }
.node[data-kind="browser-embed"] {
  border-left: 3px solid var(--warm);
  width: 560px;
}
.node[data-kind="decision"]      { border-left: 3px dashed var(--muted); }
.node[data-kind="summary"]       { border-left: 3px solid var(--accent); }

.embed-frame {
  width: 100%;
  height: 380px;
  margin-top: 8px;
  border: 1px solid var(--node-border);
  border-radius: 6px;
  background: #fff;
  display: block;
}
.embed-blocked-hint {
  margin-top: 6px;
  font-size: 11px;
  color: var(--muted);
  font-style: italic;
}

.choice-list {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 8px;
}
.choice {
  background: rgba(34, 211, 238, 0.08);
  border: 1px solid rgba(34, 211, 238, 0.4);
  color: var(--accent);
  padding: 4px 10px;
  border-radius: 999px;
  font-size: 12px;
  font-family: inherit;
  cursor: pointer;
}
.choice:hover { background: rgba(34, 211, 238, 0.18); }

.text-input {
  width: 100%;
  margin-top: 8px;
  background: rgba(2, 6, 23, 0.6);
  border: 1px solid var(--node-border);
  border-radius: 6px;
  padding: 8px;
  color: var(--text);
  font-family: inherit;
  font-size: 13px;
  resize: vertical;
  min-height: 60px;
}
.text-input:focus {
  outline: none;
  border-color: var(--accent);
}

.dropzone {
  margin-top: 8px;
  border: 1px dashed var(--node-border);
  padding: 16px;
  border-radius: 6px;
  text-align: center;
  font-size: 12px;
  color: var(--muted);
  cursor: pointer;
}
.dropzone:hover { border-color: var(--accent); color: var(--accent); }

.handoff-note {
  background: rgba(251, 191, 36, 0.08);
  border: 1px solid rgba(251, 191, 36, 0.3);
  padding: 8px;
  border-radius: 6px;
  font-size: 12px;
  color: var(--warm);
  margin-top: 8px;
}

.embed-link {
  display: block;
  margin-top: 8px;
  color: var(--accent);
  font-size: 13px;
  text-decoration: none;
}
.embed-link:hover { text-decoration: underline; }

.hint {
  margin-top: 8px;
  font-size: 11px;
  color: var(--muted);
  opacity: 0.7;
}

.connector {
  fill: none;
  stroke-width: 2;
  stroke-linecap: round;
}
.connector.next     { stroke: rgba(148, 163, 184, 0.5); }
.connector.derived  { stroke: var(--accent-2); stroke-opacity: 0.7; }
.connector.branch   { stroke: var(--warm); stroke-dasharray: 6 4; stroke-opacity: 0.7; }
.connector.reply {
  stroke: var(--accent);
  filter: drop-shadow(0 0 6px rgba(34, 211, 238, 0.55));
  animation: pulse 2.4s ease-in-out infinite;
}
@keyframes pulse {
  0%, 100% { stroke-opacity: 0.55; }
  50%      { stroke-opacity: 1; }
}

#hud {
  position: fixed;
  top: 12px;
  left: 12px;
  display: flex;
  gap: 10px;
  align-items: baseline;
  pointer-events: none;
  font-size: 12px;
  color: var(--muted);
  user-select: none;
  z-index: 10;
}
.hud-title {
  color: var(--accent);
  font-weight: 700;
  letter-spacing: 0.12em;
}

#zoom-controls {
  position: fixed;
  bottom: 16px;
  right: 16px;
  display: flex;
  flex-direction: column;
  gap: 4px;
  z-index: 10;
}
#zoom-controls button {
  width: 36px;
  height: 36px;
  background: rgba(15, 23, 42, 0.85);
  border: 1px solid var(--node-border);
  color: var(--text);
  border-radius: 8px;
  cursor: pointer;
  font-size: 16px;
  font-family: inherit;
}
#zoom-controls button:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.radial {
  position: fixed;
  width: 220px;
  height: 220px;
  margin-left: -110px;
  margin-top: -110px;
  pointer-events: none;
  z-index: 100;
}
.radial.open { pointer-events: auto; }
.radial .slice {
  fill: rgba(15, 23, 42, 0.92);
  stroke: var(--node-border);
  stroke-width: 1;
  cursor: pointer;
  transition: fill 0.15s, stroke 0.15s;
}
.radial .slice:hover {
  fill: rgba(34, 211, 238, 0.2);
  stroke: var(--accent);
}
.radial .slice.disabled {
  opacity: 0.3;
  cursor: not-allowed;
  pointer-events: none;
}
.radial .label {
  fill: var(--text);
  font-size: 11px;
  text-anchor: middle;
  dominant-baseline: middle;
  pointer-events: none;
  user-select: none;
}
.radial .center {
  fill: rgba(2, 6, 23, 0.95);
  stroke: var(--accent);
  pointer-events: none;
}
.radial .center-label {
  fill: var(--muted);
  font-size: 10px;
  text-anchor: middle;
  dominant-baseline: middle;
  pointer-events: none;
  text-transform: uppercase;
  letter-spacing: 0.1em;
}