* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  --bg-dark: #1a1a2e;
  --bg-darker: #0f0f1a;
  --bg-panel: #16213e;
  --border: #2a2a4a;
  --text: #e4e4e4;
  --text-dim: #8888aa;
  --accent: #4a9eff;
  --accent-hover: #6ab0ff;
  --success: #4ade80;
  --error: #f87171;
  --warning: #fbbf24;
  
  --port-string: #4ade80;
  --port-number: #60a5fa;
  --port-boolean: #f472b6;
  --port-array: #c084fc;
  --port-object: #fb923c;
  --port-any: #94a3b8;
}

body {
  background: var(--bg-darker);
  color: var(--text);
  font-family: 'SF Pro Display', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  height: 100vh;
  overflow: hidden;
}

#app {
  display: flex;
  flex-direction: column;
  height: 100%;
}

/* Header */
#header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 12px 20px;
  background: var(--bg-dark);
  border-bottom: 1px solid var(--border);
  z-index: 100;
}

#header h1 {
  font-size: 16px;
  font-weight: 600;
  letter-spacing: 2px;
}

.header-actions {
  display: flex;
  gap: 8px;
  align-items: center;
}

.header-actions button {
  background: rgba(255,255,255,0.05);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 8px 16px;
  border-radius: 6px;
  cursor: pointer;
  font-size: 13px;
  transition: all 0.2s;
}

.header-actions button:hover {
  background: rgba(255,255,255,0.1);
  border-color: var(--accent);
}

.header-actions button.primary {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}

.header-actions button.primary:hover {
  background: var(--accent-hover);
}

.divider {
  width: 1px;
  height: 24px;
  background: var(--border);
  margin: 0 8px;
}

/* Main Layout */
#main {
  display: flex;
  flex: 1;
  overflow: hidden;
}

/* Palette */
#palette {
  width: 200px;
  background: var(--bg-panel);
  border-right: 1px solid var(--border);
  overflow-y: auto;
  flex-shrink: 0;
}

.palette-section {
  padding: 16px;
  border-bottom: 1px solid var(--border);
}

.palette-header {
  font-size: 12px;
  font-weight: 600;
  color: var(--text-dim);
  margin-bottom: 12px;
  text-transform: uppercase;
  letter-spacing: 1px;
}

.palette-nodes {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.palette-node {
  background: var(--bg-dark);
  border: 1px solid var(--border);
  padding: 8px 12px;
  border-radius: 6px;
  font-size: 12px;
  cursor: grab;
  transition: all 0.2s;
  user-select: none;
}

.palette-node:hover {
  border-color: var(--accent);
  transform: translateY(-1px);
}

.palette-node:active {
  cursor: grabbing;
}

.palette-examples {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.example-btn {
  background: transparent;
  border: 1px dashed var(--border);
  color: var(--text-dim);
  padding: 8px;
  border-radius: 6px;
  font-size: 11px;
  cursor: pointer;
  text-align: left;
  transition: all 0.2s;
}

.example-btn:hover {
  border-color: var(--accent);
  color: var(--text);
}

.palette-help {
  margin-top: 12px;
  padding: 10px;
  background: rgba(124, 58, 237, 0.1);
  border-radius: 6px;
  border: 1px solid rgba(124, 58, 237, 0.2);
}

.palette-help small {
  color: var(--text-dim);
  font-size: 10px;
  line-height: 1.5;
}

/* Canvas */
#canvas-container {
  flex: 1;
  position: relative;
  overflow: hidden;
  background: 
    radial-gradient(circle at center, var(--bg-dark) 0%, var(--bg-darker) 100%),
    repeating-linear-gradient(0deg, transparent, transparent 19px, var(--border) 19px, var(--border) 20px),
    repeating-linear-gradient(90deg, transparent, transparent 19px, var(--border) 19px, var(--border) 20px);
  background-size: 100% 100%, 20px 20px, 20px 20px;
}

#canvas {
  position: absolute;
  width: 4000px;
  height: 4000px;
  transform-origin: 0 0;
}

#connections {
  position: absolute;
  width: 4000px;
  height: 4000px;
  pointer-events: none;
  z-index: 1;
}

#connections path {
  fill: none;
  stroke-width: 3;
  pointer-events: stroke;
}

#connections path:hover {
  stroke-width: 5;
}

/* Nodes */
.node {
  position: absolute;
  background: var(--bg-panel);
  border: 2px solid var(--border);
  border-radius: 8px;
  min-width: 180px;
  box-shadow: 0 4px 12px rgba(0,0,0,0.3);
  z-index: 10;
  transition: box-shadow 0.2s, border-color 0.2s;
}

.node:hover {
  border-color: rgba(74, 158, 255, 0.5);
}

.node.selected {
  border-color: var(--accent);
  box-shadow: 0 0 0 2px rgba(74, 158, 255, 0.3), 0 4px 12px rgba(0,0,0,0.3);
}

.node.running {
  border-color: var(--warning);
  animation: pulse 1s infinite;
}

.node.success {
  border-color: var(--success);
}

.node.error {
  border-color: var(--error);
}

@keyframes pulse {
  0%, 100% { box-shadow: 0 0 0 2px rgba(251, 191, 36, 0.3); }
  50% { box-shadow: 0 0 0 6px rgba(251, 191, 36, 0.1); }
}

.node-header {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 12px;
  background: rgba(0,0,0,0.2);
  border-radius: 6px 6px 0 0;
  cursor: move;
}

.node-icon {
  font-size: 14px;
}

.node-title {
  font-size: 13px;
  font-weight: 500;
  flex: 1;
}

.node-body {
  padding: 12px;
}

.node-field {
  margin-bottom: 10px;
}

.node-field:last-child {
  margin-bottom: 0;
}

.node-field label {
  display: block;
  font-size: 10px;
  color: var(--text-dim);
  margin-bottom: 4px;
  text-transform: uppercase;
}

.node-field input,
.node-field textarea,
.node-field select {
  width: 100%;
  background: var(--bg-dark);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 8px;
  border-radius: 4px;
  font-size: 12px;
  font-family: 'SF Mono', Monaco, monospace;
}

.node-field textarea {
  min-height: 60px;
  resize: vertical;
}

.node-field input:focus,
.node-field textarea:focus,
.node-field select:focus {
  outline: none;
  border-color: var(--accent);
}

/* Ports */
.node-ports {
  display: flex;
  justify-content: space-between;
  padding: 8px 0;
}

.ports-in, .ports-out {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.port {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 11px;
  color: var(--text-dim);
  cursor: crosshair;
}

.ports-out .port {
  flex-direction: row-reverse;
}

.port-dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--port-any);
  border: 2px solid var(--bg-panel);
  transition: transform 0.15s;
}

.port:hover .port-dot {
  transform: scale(1.3);
}

.port-dot.string { background: var(--port-string); }
.port-dot.number { background: var(--port-number); }
.port-dot.boolean { background: var(--port-boolean); }
.port-dot.array { background: var(--port-array); }
.port-dot.object { background: var(--port-object); }
.port-dot.any { background: var(--port-any); }

.port-dot.connected {
  box-shadow: 0 0 6px currentColor;
}

/* Port positioning */
.ports-in {
  margin-left: -6px;
}

.ports-out {
  margin-right: -6px;
}

/* Node result badge */
.node-result {
  position: absolute;
  top: -8px;
  right: -8px;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 12px;
  background: var(--success);
  color: #fff;
}

.node-result.error {
  background: var(--error);
}

/* Minimap */
#minimap {
  position: absolute;
  bottom: 20px;
  right: 20px;
  width: 150px;
  height: 100px;
  background: rgba(0,0,0,0.5);
  border: 1px solid var(--border);
  border-radius: 6px;
  overflow: hidden;
}

#minimap-canvas {
  width: 100%;
  height: 100%;
}

/* Preview Panel */
#preview-panel {
  width: 280px;
  background: var(--bg-panel);
  border-left: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  flex-shrink: 0;
}

.preview-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 12px 16px;
  border-bottom: 1px solid var(--border);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 1px;
  color: var(--text-dim);
}

.icon-btn {
  background: none;
  border: none;
  color: var(--text-dim);
  font-size: 18px;
  cursor: pointer;
  padding: 0;
  line-height: 1;
}

.icon-btn:hover {
  color: var(--text);
}

#preview-content {
  flex: 1;
  overflow-y: auto;
  padding: 16px;
}

.preview-empty {
  color: var(--text-dim);
  font-size: 13px;
  text-align: center;
  padding: 20px;
}

.preview-node-name {
  font-weight: 600;
  margin-bottom: 12px;
  color: var(--accent);
}

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

.preview-label {
  font-size: 10px;
  color: var(--text-dim);
  text-transform: uppercase;
  margin-bottom: 6px;
}

.preview-data {
  background: var(--bg-dark);
  border-radius: 4px;
  padding: 10px;
  font-family: 'SF Mono', Monaco, monospace;
  font-size: 11px;
  white-space: pre-wrap;
  word-break: break-all;
  max-height: 200px;
  overflow-y: auto;
}

/* Context Menu */
#context-menu {
  position: fixed;
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: 6px;
  box-shadow: 0 4px 12px rgba(0,0,0,0.4);
  z-index: 1000;
  min-width: 150px;
}

#context-menu.hidden {
  display: none;
}

.context-item {
  padding: 10px 16px;
  font-size: 13px;
  cursor: pointer;
  transition: background 0.15s;
}

.context-item:hover {
  background: rgba(255,255,255,0.05);
}

.context-item:first-child {
  border-radius: 6px 6px 0 0;
}

.context-item:last-child {
  border-radius: 0 0 6px 6px;
}

/* Modal */
.modal {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.7);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
}

.modal.hidden {
  display: none;
}

.modal-content {
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: 12px;
  width: 400px;
  max-height: 500px;
}

.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 16px 20px;
  border-bottom: 1px solid var(--border);
}

.modal-header h2 {
  font-size: 16px;
  font-weight: 500;
}

.close-btn {
  background: none;
  border: none;
  color: var(--text-dim);
  font-size: 24px;
  cursor: pointer;
  line-height: 1;
}

.close-btn:hover {
  color: var(--text);
}

.modal-body {
  padding: 20px;
}

.modal-body label {
  display: block;
  font-size: 12px;
  color: var(--text-dim);
  margin-bottom: 8px;
}

.modal-body input {
  width: 100%;
  background: var(--bg-dark);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 12px;
  border-radius: 6px;
  font-size: 14px;
  margin-bottom: 16px;
}

.modal-body input:focus {
  outline: none;
  border-color: var(--accent);
}

.modal-body button {
  width: 100%;
}

.saved-flow-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 12px;
  background: var(--bg-dark);
  border-radius: 6px;
  margin-bottom: 8px;
  cursor: pointer;
  transition: background 0.2s;
}

.saved-flow-item:hover {
  background: rgba(74, 158, 255, 0.1);
}

.saved-flow-name {
  font-size: 14px;
}

.saved-flow-date {
  font-size: 11px;
  color: var(--text-dim);
}

.saved-flow-delete {
  background: none;
  border: none;
  color: var(--text-dim);
  cursor: pointer;
  font-size: 16px;
}

.saved-flow-delete:hover {
  color: var(--error);
}

/* Toast */
#toast {
  position: fixed;
  bottom: 30px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--accent);
  color: #fff;
  padding: 12px 24px;
  border-radius: 8px;
  font-size: 14px;
  z-index: 1001;
  transition: opacity 0.3s;
}

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

#toast.error {
  background: var(--error);
}

#toast.success {
  background: var(--success);
}

/* Scrollbar */
::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}

::-webkit-scrollbar-track {
  background: transparent;
}

::-webkit-scrollbar-thumb {
  background: var(--border);
  border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
  background: rgba(255,255,255,0.2);
}

/* Temp connection line while dragging */
#temp-connection {
  stroke: var(--accent);
  stroke-width: 3;
  stroke-dasharray: 8 4;
  fill: none;
  pointer-events: none;
}