/* Modern Web Design System for Minimal Flowchart */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600&family=JetBrains+Mono:wght@400;500&display=swap');

:root {
  /* Common variables */
  --font-sans: var(--custom-font-family, 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif);
  --font-mono: 'JetBrains Mono', monospace;
  --sidebar-width: 340px;
  --transition-fast: 0.15s ease;
  --transition-normal: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  
  /* Light Theme Variables */
  --bg-color: #fafafa;
  --panel-bg: #ffffff;
  --panel-border: #e5e5e5;
  --text-primary: #171717;
  --text-secondary: #666666;
  --text-muted: #a3a3a3;
  --accent-color: #000000;
  --accent-hover: #262626;
  --accent-bg-subtle: #f5f5f5;
  
  /* SVG & Node Styles (Light Mode) */
  --node-bg: #ffffff;
  --node-border: #171717;
  --node-border-hover: #000000;
  --node-text: #171717;
  --connector-stroke: #171717;
  --grid-dot: #e5e5e5;
  --input-focus-ring: rgba(0, 0, 0, 0.05);
  
  /* Shadow */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.05), 0 2px 4px -2px rgba(0, 0, 0, 0.05);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.05), 0 4px 6px -4px rgba(0, 0, 0, 0.05);
}

[data-theme="dark"] {
  /* Dark Theme Variables */
  --bg-color: #0a0a0a;
  --panel-bg: #121212;
  --panel-border: #262626;
  --text-primary: #f5f5f5;
  --text-secondary: #a3a3a3;
  --text-muted: #525252;
  --accent-color: #ffffff;
  --accent-hover: #e5e5e5;
  --accent-bg-subtle: #1a1a1a;
  
  /* SVG & Node Styles (Dark Mode) */
  --node-bg: #121212;
  --node-border: #a3a3a3;
  --node-border-hover: #ffffff;
  --node-text: #f5f5f5;
  --connector-stroke: #a3a3a3;
  --grid-dot: #222222;
  --input-focus-ring: rgba(255, 255, 255, 0.05);
  
  /* Shadow */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.2);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.3), 0 2px 4px -2px rgba(0, 0, 0, 0.3);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.4), 0 4px 6px -4px rgba(0, 0, 0, 0.4);
}

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

body {
  font-family: var(--font-sans);
  background-color: var(--bg-color);
  color: var(--text-primary);
  height: 100vh;
  overflow: hidden;
  display: flex;
  transition: background-color var(--transition-normal), color var(--transition-normal);
}

/* App Layout */
.app-container {
  display: flex;
  width: 100%;
  height: 100vh;
  overflow: hidden;
}

/* Left Narrow Toolbar (Photoshop style) */
.left-toolbar {
  width: 56px;
  height: 100%;
  background-color: var(--panel-bg);
  border-right: 1px solid var(--panel-border);
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 16px 0;
  gap: 12px;
  z-index: 10;
  flex-shrink: 0;
  transition: background-color var(--transition-normal), border-color var(--transition-normal);
}

.toolbar-section {
  display: flex;
  flex-direction: column;
  align-items: center;
  width: 100%;
  gap: 8px;
}

.toolbar-divider {
  width: 24px;
  height: 1px;
  background-color: var(--panel-border);
  margin: 4px 0;
  flex-shrink: 0;
}

.zoom-display {
  font-family: var(--font-mono);
  font-size: 9px;
  font-weight: 500;
  color: var(--text-secondary);
  user-select: none;
  text-align: center;
  display: inline-block;
  margin: 2px 0;
}

/* Tool Buttons in Left Dock */
.tool-btn {
  width: 36px;
  height: 36px;
  border-radius: 4px;
  border: 1px solid transparent;
  background: transparent;
  color: var(--text-secondary);
  cursor: pointer;
  display: flex;
  justify-content: center;
  align-items: center;
  transition: all var(--transition-fast);
  padding: 0;
  position: relative;
}

.tool-btn svg {
  width: 18px;
  height: 18px;
}

.tool-btn:hover {
  background-color: var(--accent-bg-subtle);
  color: var(--text-primary);
}

.tool-btn.active {
  background-color: var(--accent-color);
  color: var(--panel-bg);
  border-color: var(--accent-color);
}

/* Right Sidebar (Photoshop style Inspector) */
.right-sidebar {
  width: 320px;
  height: 100%;
  background-color: var(--panel-bg);
  border-left: 1px solid var(--panel-border);
  display: flex;
  flex-direction: column;
  flex-shrink: 0;
  z-index: 10;
  box-shadow: var(--shadow-sm);
  transition: background-color var(--transition-normal), border-color var(--transition-normal);
}

/* Tab Headers */
.sidebar-tabs {
  display: flex;
  border-bottom: 1px solid var(--panel-border);
  background-color: var(--panel-bg);
  flex-shrink: 0;
}

.tab-btn {
  flex: 1;
  padding: 12px 6px;
  font-size: 10px;
  font-weight: 600;
  font-family: var(--font-mono);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  background: transparent;
  border: none;
  border-bottom: 2px solid transparent;
  color: var(--text-secondary);
  cursor: pointer;
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 6px;
  transition: all var(--transition-fast);
}

.tab-btn svg {
  width: 13px;
  height: 13px;
}

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

.tab-btn.active {
  color: var(--text-primary);
  border-bottom-color: var(--text-primary);
}

/* Tab Contents */
.sidebar-tab-content {
  display: none;
  flex: 1;
  overflow-y: auto;
  padding: 20px;
}

.sidebar-tab-content::-webkit-scrollbar {
  width: 4px;
}
.sidebar-tab-content::-webkit-scrollbar-track {
  background: transparent;
}
.sidebar-tab-content::-webkit-scrollbar-thumb {
  background: var(--panel-border);
  border-radius: 2px;
}

.sidebar-tab-content.active {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

/* Input Fields & Groups */
.input-section-title {
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-secondary);
  margin-bottom: 12px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.input-section-title span.col-badge {
  font-size: 9px;
  padding: 2px 6px;
  background-color: var(--accent-bg-subtle);
  border: 1px solid var(--panel-border);
  color: var(--text-primary);
  font-family: var(--font-mono);
}

.input-group {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.input-field-wrapper {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.input-field-wrapper label {
  font-size: 11px;
  color: var(--text-secondary);
  font-family: var(--font-mono);
}

.text-input {
  width: 100%;
  padding: 10px 12px;
  font-size: 13px;
  font-family: var(--font-sans);
  background-color: var(--bg-color);
  border: 1px solid var(--panel-border);
  color: var(--text-primary);
  outline: none;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.text-input:focus {
  border-color: var(--text-primary);
  box-shadow: 0 0 0 3px var(--input-focus-ring);
}

.text-input::placeholder {
  color: var(--text-muted);
  font-style: italic;
  font-size: 12px;
}

/* Settings Controls */
.settings-group {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.settings-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
}

.settings-row label {
  font-size: 13px;
  color: var(--text-primary);
  flex-shrink: 0;
}

/* Button Group / Actions */
.sidebar-footer {
  padding: 20px 24px;
  border-top: 1px solid var(--panel-border);
  display: flex;
  flex-direction: column;
  gap: 10px;
  background-color: var(--panel-bg);
}

.btn {
  width: 100%;
  padding: 12px;
  font-size: 13px;
  font-weight: 500;
  font-family: var(--font-sans);
  cursor: pointer;
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 8px;
  border: 1px solid var(--panel-border);
  background-color: var(--panel-bg);
  color: var(--text-primary);
  transition: all var(--transition-fast);
}

.btn:hover {
  background-color: var(--accent-bg-subtle);
  border-color: var(--text-primary);
}

.btn-primary {
  background-color: var(--accent-color);
  color: var(--panel-bg);
  border-color: var(--accent-color);
}

.btn-primary:hover {
  background-color: var(--accent-hover);
  border-color: var(--accent-hover);
  color: var(--panel-bg);
}

/* Canvas / Flowchart Area */
.canvas-container {
  flex: 1;
  height: 100%;
  position: relative;
  overflow: hidden;
  display: flex;
  justify-content: center;
  align-items: center;
}

.canvas-bg {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: var(--bg-color);
  background-image: radial-gradient(var(--grid-dot) 1.5px, transparent 1.5px);
  background-size: 24px 24px;
  z-index: 1;
  transition: background-color var(--transition-normal);
}

.canvas-viewport {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 2;
  overflow: hidden;
  display: block;
}

/* SVG Flowchart styling */
#flowchart-svg {
  position: absolute;
  top: 0;
  left: 0;
  transform-origin: 0 0;
  overflow: visible;
  filter: drop-shadow(var(--shadow-sm));
  user-select: none;
}

/* SVG Elements styling */
.connector-line {
  fill: none;
  stroke: var(--connector-stroke);
  stroke-width: 1.25px;
  transition: stroke var(--transition-normal), stroke-width var(--transition-fast);
}

.connector-line.dashed {
  stroke-dasharray: 4, 4;
}

.connector-line:hover {
  stroke-width: 2px;
}

.arrow-head {
  fill: currentColor;
  transition: fill var(--transition-normal);
}

.node-rect {
  fill: var(--node-bg);
  stroke: var(--node-border);
  stroke-width: 1px;
  transition: fill var(--transition-normal), stroke var(--transition-normal), stroke-width var(--transition-fast);
}

.node-group:hover .node-rect {
  stroke: var(--node-border-hover);
  stroke-width: 1.5px;
  cursor: pointer;
}

.node-group.active .node-rect {
  stroke: var(--accent-color);
  stroke-width: 2px;
}

.node-text {
  fill: var(--node-text);
  font-family: var(--font-sans);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: -0.01em;
  text-anchor: middle;
  dominant-baseline: middle;
  pointer-events: none;
  transition: fill var(--transition-normal);
}

.node-text tspan {
  dominant-baseline: alphabetic;
}

/* Floating Toolbar */
.floating-toolbar {
  position: absolute;
  bottom: 24px;
  right: 24px;
  z-index: 5;
  display: flex;
  gap: 8px;
  background-color: var(--panel-bg);
  border: 1px solid var(--panel-border);
  padding: 6px;
  box-shadow: var(--shadow-md);
  transition: background-color var(--transition-normal), border-color var(--transition-normal), box-shadow var(--transition-normal);
}

.toolbar-btn {
  background: transparent;
  border: none;
  cursor: pointer;
  width: 36px;
  height: 36px;
  display: flex;
  justify-content: center;
  align-items: center;
  color: var(--text-secondary);
  transition: all var(--transition-fast);
}

.toolbar-btn:hover {
  background-color: var(--accent-bg-subtle);
  color: var(--text-primary);
}

.toolbar-btn svg {
  width: 18px;
  height: 18px;
  stroke-width: 1.75px;
}

/* Tooltip */
[data-tooltip] {
  position: relative;
}

[data-tooltip]::after {
  content: attr(data-tooltip);
  position: absolute;
  bottom: 125%;
  left: 50%;
  transform: translateX(-50%) translateY(4px);
  background-color: var(--text-primary);
  color: var(--bg-color);
  font-size: 10px;
  font-family: var(--font-mono);
  padding: 4px 8px;
  white-space: nowrap;
  opacity: 0;
  pointer-events: none;
  transition: all var(--transition-fast);
  z-index: 100;
  box-shadow: var(--shadow-sm);
}

[data-tooltip]:hover::after {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

/* Tooltip overrides for left toolbar to prevent cropping at window edge */
.left-toolbar [data-tooltip]::after {
  bottom: auto;
  left: 125%;
  top: 50%;
  transform: translateY(-50%) translateX(-4px);
}

.left-toolbar [data-tooltip]:hover::after {
  opacity: 1;
  transform: translateY(-50%) translateX(0);
}

/* Selector buttons for stroke thickness & style */
.toggle-selector {
  display: flex;
  border: 1px solid var(--panel-border);
  background-color: var(--bg-color);
  padding: 2px;
  flex-shrink: 0;
  border-radius: 4px;
}

.selector-option {
  padding: 6px 12px;
  font-size: 11px;
  font-family: var(--font-mono);
  cursor: pointer;
  background: transparent;
  border: none;
  color: var(--text-secondary);
  transition: all var(--transition-fast);
  white-space: nowrap;
  flex-shrink: 0;
}

.selector-option:hover {
  color: var(--text-primary);
}

.selector-option.active {
  background-color: var(--panel-bg);
  color: var(--text-primary);
  font-weight: 500;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--panel-border);
}

/* Responsive adjust */
@media (max-width: 1024px) {
  body {
    flex-direction: column;
    overflow: auto;
  }
  .app-container {
    flex-direction: column;
    height: auto;
    overflow: visible;
  }
  .left-toolbar {
    width: 100%;
    height: auto;
    flex-direction: row;
    justify-content: center;
    border-right: none;
    border-bottom: 1px solid var(--panel-border);
    padding: 8px 16px;
    gap: 16px;
  }
  .left-toolbar .toolbar-section {
    flex-direction: row;
    width: auto;
    gap: 12px;
  }
  .left-toolbar .toolbar-divider {
    width: 1px;
    height: 24px;
    margin: 0 4px;
  }
  .right-sidebar {
    width: 100%;
    height: auto;
    border-left: none;
    border-top: 1px solid var(--panel-border);
  }
  .canvas-container {
    height: 600px;
    width: 100%;
  }
  .floating-toolbar {
    bottom: 16px;
    right: 16px;
  }
}

/* Toast Notification styling */
#app-toast {
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translate(-50%, 80px);
  background-color: var(--text-primary);
  color: var(--bg-color);
  padding: 12px 24px;
  font-size: 13px;
  font-family: var(--font-mono);
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--panel-border);
  transition: transform 0.35s cubic-bezier(0.175, 0.885, 0.32, 1.275), opacity 0.25s ease;
  opacity: 0;
  pointer-events: none;
  z-index: 1000;
}

#app-toast.toast-show {
  transform: translate(-50%, 0);
  opacity: 1;
}

/* Guidelines and headers on the canvas */
.column-guide {
  stroke: var(--panel-border);
  stroke-width: 1px;
  stroke-dasharray: 4, 8;
  opacity: 0.35;
  pointer-events: none;
  transition: x1 var(--transition-normal), x2 var(--transition-normal), stroke var(--transition-normal);
}

.column-header-text {
  fill: var(--text-secondary);
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 600;
  text-anchor: middle;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  pointer-events: none;
  opacity: 0.7;
  transition: x var(--transition-normal), fill var(--transition-normal);
}

/* Sidebar Columns/Nodes List styling */
.structure-column-item {
  border: 1px solid var(--panel-border);
  background-color: var(--panel-bg);
  padding: 14px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  transition: background-color var(--transition-normal), border-color var(--transition-normal);
}

.structure-column-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 12px;
  font-weight: 600;
  font-family: var(--font-mono);
  color: var(--text-primary);
}

.btn-icon-sm {
  background: transparent;
  border: none;
  cursor: pointer;
  padding: 2px 4px;
  color: var(--text-muted);
  font-size: 11px;
  display: flex;
  align-items: center;
  gap: 2px;
  transition: color var(--transition-fast);
}

.btn-icon-sm:hover {
  color: #ef4444;
}

.structure-node-list {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin-top: 4px;
}

.structure-node-item {
  padding: 8px 10px;
  background-color: var(--bg-color);
  border: 1px solid var(--panel-border);
  font-size: 12px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.structure-node-item:hover {
  border-color: var(--text-primary);
  background-color: var(--accent-bg-subtle);
}

.structure-node-item.selected {
  border-color: var(--accent-color);
  background-color: var(--accent-bg-subtle);
  font-weight: 600;
}

.structure-node-item span.node-id-tag {
  font-family: var(--font-mono);
  font-size: 10px;
  color: var(--text-secondary);
}

/* Sidebar Connections/Targets Checkbox grid */
.target-checkbox-grid {
  display: flex;
  flex-direction: column;
  gap: 8px;
  max-height: 180px;
  overflow-y: auto;
  border: 1px solid var(--panel-border);
  padding: 10px;
  background-color: var(--bg-color);
  transition: background-color var(--transition-normal), border-color var(--transition-normal);
}

.target-checkbox-grid::-webkit-scrollbar {
  width: 4px;
}
.target-checkbox-grid::-webkit-scrollbar-thumb {
  background: var(--panel-border);
  border-radius: 2px;
}

.target-checkbox-column-group {
  margin-bottom: 6px;
}

.target-checkbox-column-title {
  font-size: 9px;
  font-weight: 600;
  font-family: var(--font-mono);
  color: var(--text-secondary);
  margin-bottom: 4px;
  border-bottom: 1px solid var(--panel-border);
  padding-bottom: 2px;
  text-transform: uppercase;
}

.target-checkbox-row {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 12px;
  padding: 2px 0;
}

.target-checkbox-row input[type="checkbox"] {
  cursor: pointer;
  accent-color: var(--accent-color);
}

.target-checkbox-row label {
  cursor: pointer;
  font-family: var(--font-sans);
  flex: 1;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.empty-selection-placeholder {
  font-size: 12px;
  color: var(--text-secondary);
  text-align: center;
  padding: 20px 10px;
  border: 1px dashed var(--panel-border);
  font-style: italic;
}

.btn-danger {
  border-color: #ef4444;
  color: #ef4444;
}

.btn-danger:hover {
  background-color: rgba(239, 68, 68, 0.05);
  border-color: #ef4444;
}

/* Canvas Toolbar */
.canvas-toolbar {
  position: absolute;
  top: 24px;
  left: 50%;
  transform: translateX(-50%);
  background-color: var(--panel-bg);
  border: 1px solid var(--panel-border);
  padding: 4px;
  display: flex;
  gap: 4px;
  box-shadow: var(--shadow-md);
  z-index: 5;
  transition: background-color var(--transition-normal), border-color var(--transition-normal);
}

.canvas-tool-btn {
  background: transparent;
  border: none;
  cursor: pointer;
  padding: 6px 14px;
  font-size: 12px;
  font-weight: 500;
  font-family: var(--font-sans);
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  border-radius: 0;
  transition: all var(--transition-fast);
}

.canvas-tool-btn:hover {
  color: var(--text-primary);
  background-color: var(--accent-bg-subtle);
}

.canvas-tool-btn.active {
  background-color: var(--accent-color);
  color: var(--panel-bg);
}

/* Cursor change when connect tool is active */
.canvas-container.tool-connect #flowchart-svg {
  cursor: crosshair;
}

.canvas-container.tool-connect .node-group:hover .node-rect {
  stroke: #3b82f6; /* blue for connection hover */
}

/* Connection Source highlighting */
.node-group.connecting-source .node-rect {
  stroke: #3b82f6 !important;
  stroke-width: 2px !important;
  stroke-dasharray: 4, 3;
  animation: strokePulse 1.5s infinite linear;
}

@keyframes strokePulse {
  to {
    stroke-dashoffset: -14;
  }
}

/* Inline Box text editor */
.inline-node-editor {
  position: absolute;
  background-color: var(--node-bg);
  color: var(--text-primary);
  border: 1.5px solid var(--accent-color);
  font-family: var(--font-sans);
  font-size: 12px;
  font-weight: 500;
  text-align: center;
  outline: none;
  padding: 0 8px;
  z-index: 100;
  box-shadow: var(--shadow-md);
  box-sizing: border-box;
}

.node-group.inline-editing .node-text {
  visibility: hidden;
}

.connection-position-controls {
  display: flex;
  flex-direction: column;
  gap: 9px;
  margin-top: 2px;
  min-width: 0;
}

.connection-position-control {
  display: flex;
  flex-direction: column;
  gap: 4px;
  min-width: 0;
}

.connection-position-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  color: var(--text-secondary);
  font-family: var(--font-mono);
  font-size: 8px;
  text-transform: uppercase;
}

.connection-position-header output {
  color: var(--text-primary);
  font-size: 9px;
  text-transform: none;
}

.connection-position-row {
  display: grid;
  grid-template-columns: minmax(80px, 1fr) 62px 10px;
  align-items: center;
  gap: 5px;
  min-width: 0;
}

.connection-position-slider {
  width: 100%;
  min-width: 0;
  accent-color: var(--accent-color);
  cursor: pointer;
}

.connection-position-number {
  width: 62px;
  height: 26px;
  padding: 2px 4px;
  box-sizing: border-box;
  font-family: var(--font-mono);
  font-size: 10px;
}

.connection-position-unit {
  color: var(--text-secondary);
  font-family: var(--font-mono);
  font-size: 9px;
}

/* Selection Marquee */
.selection-marquee {
  position: absolute;
  border: 1px dashed var(--accent-color);
  background-color: rgba(23, 23, 23, 0.05);
  pointer-events: none;
  z-index: 1000;
}
[data-theme="dark"] .selection-marquee {
  background-color: rgba(255, 255, 255, 0.05);
}

/* Chart Title Text */
.chart-title-text {
  fill: var(--text-primary);
  font-size: 20px;
  font-weight: 700;
  letter-spacing: -0.02em;
  text-transform: uppercase;
  pointer-events: none;
  transition: fill var(--transition-normal);
}

/* Selected Node highlight border */
.node-group.selected .node-rect {
  stroke: var(--accent-color) !important;
  stroke-width: 2.5px !important;
}

/* Resize Handles */
.resize-handle {
  fill: #ffffff;
  stroke: var(--accent-color);
  stroke-width: 1.5px;
  cursor: pointer;
}
.resize-handle:hover {
  fill: var(--accent-color);
}
.resize-handle[data-dir="nw"], .resize-handle[data-dir="se"] { cursor: nwse-resize; }
.resize-handle[data-dir="ne"], .resize-handle[data-dir="sw"] { cursor: nesw-resize; }
.resize-handle[data-dir="n"], .resize-handle[data-dir="s"] { cursor: ns-resize; }
.resize-handle[data-dir="e"], .resize-handle[data-dir="w"] { cursor: ew-resize; }

/* Custom styled color picker inputs to look like premium color buttons */
.color-picker-input {
  border: 1px solid var(--panel-border);
  background: none;
  cursor: pointer;
  border-radius: 4px;
  box-sizing: border-box;
}

.color-picker-input::-webkit-color-swatch-wrapper {
  padding: 0;
}

.color-picker-input::-webkit-color-swatch {
  border: none;
  border-radius: 3px;
}

/* Modal Backdrop styling */
.modal-backdrop {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background-color: rgba(0, 0, 0, 0.4);
  backdrop-filter: blur(4px);
  z-index: 2000;
  display: flex;
  justify-content: center;
  align-items: center;
  animation: fadeIn var(--transition-fast);
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

/* Modal Box styling */
.modal-content {
  background-color: var(--panel-bg);
  border: 1px solid var(--panel-border);
  box-shadow: var(--shadow-lg);
  border-radius: 8px;
  width: 440px;
  max-width: 90%;
  animation: scaleIn var(--transition-normal);
  display: flex;
  flex-direction: column;
}

@keyframes scaleIn {
  from { transform: scale(0.95); opacity: 0; }
  to { transform: scale(1); opacity: 1; }
}

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

.modal-header h2 {
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-family: var(--font-mono);
  color: var(--text-primary);
}

.modal-close-btn {
  background: transparent;
  border: none;
  font-size: 20px;
  font-weight: bold;
  color: var(--text-secondary);
  cursor: pointer;
  transition: color var(--transition-fast);
  line-height: 1;
}

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

.modal-body {
  padding: 20px;
}

/* Shortcuts Table styling */
.shortcuts-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 12px;
}

.shortcuts-table th, .shortcuts-table td {
  padding: 10px 8px;
  text-align: left;
  border-bottom: 1px solid var(--panel-border);
}

.shortcuts-table th {
  font-family: var(--font-mono);
  font-weight: 600;
  text-transform: uppercase;
  color: var(--text-secondary);
  font-size: 10px;
  padding-bottom: 8px;
}

.shortcuts-table td kbd {
  background-color: var(--accent-bg-subtle);
  border: 1px solid var(--panel-border);
  border-radius: 3px;
  padding: 2px 5px;
  font-family: var(--font-mono);
  font-size: 11px;
  box-shadow: 0 1px 1px rgba(0,0,0,0.1);
  color: var(--text-primary);
}

/* Real-time search highlight glow */
.node-group.search-match .node-rect {
  filter: drop-shadow(0 0 6px var(--accent-color));
  stroke: var(--accent-color) !important;
  stroke-width: 2.5px !important;
  animation: searchPulse 2s infinite ease-in-out;
}

@keyframes searchPulse {
  0%, 100% {
    filter: drop-shadow(0 0 4px var(--accent-color));
    opacity: 0.95;
  }
  50% {
    filter: drop-shadow(0 0 14px var(--accent-color));
    opacity: 1;
  }
}

/* Temporary focus highlight flash on center-zoom */
.node-group.temp-focus-highlight .node-rect {
  animation: tempFocusFlash 0.5s ease-in-out 3;
}

@keyframes tempFocusFlash {
  0%, 100% {
    filter: none;
  }
  50% {
    filter: drop-shadow(0 0 18px var(--accent-color));
    stroke: var(--accent-color) !important;
    stroke-width: 3.5px !important;
  }
}

/* Locate target button animation in sidebar */
.locate-node-btn {
  transition: color 0.15s ease, transform 0.15s ease;
}

.locate-node-btn:hover {
  color: var(--accent-color) !important;
  transform: scale(1.2);
}

/* CSS transition for smooth styling updates */
.node-group .node-rect {
  transition: filter var(--transition-normal), stroke var(--transition-normal), stroke-width var(--transition-normal);
}

.node-lock-indicator {
  opacity: 0.75;
  transition: opacity var(--transition-normal);
}

.node-group:hover .node-lock-indicator {
  opacity: 1;
}

/* Interactive Connection Line and Hover/Selected States */
.connector-line.hovered {
  stroke-width: 2.5px !important;
  stroke: var(--accent-color) !important;
}

.connector-line.selected {
  stroke: #3b82f6 !important;
  stroke-width: 3.5px !important;
  filter: drop-shadow(0 0 4px rgba(59, 130, 246, 0.7));
}

.connector-line-interactive-overlay {
  fill: none;
  stroke: transparent;
  stroke-width: 14px;
  cursor: pointer;
  pointer-events: stroke;
}

.connection-anchor-handle {
  fill: #ffffff;
  stroke: #2563eb;
  stroke-width: 2px;
  cursor: grab;
  pointer-events: all;
  filter: drop-shadow(0 1px 2px rgba(37, 99, 235, 0.35));
}

.connection-anchor-handle.target {
  fill: #2563eb;
}

.connection-anchor-handle.snapped-90 {
  stroke: #16a34a;
  stroke-width: 3px;
}

.connection-anchor-handle.target.snapped-90 {
  fill: #16a34a;
}

.connection-anchor-handle:active {
  cursor: grabbing;
}

.selection-format-toolbar {
  flex-wrap: wrap;
  justify-content: flex-end;
}

/* Mini-Map Navigator Overlay */
.minimap-container {
  position: absolute;
  bottom: 20px;
  right: 20px;
  width: 200px;
  background-color: var(--panel-bg);
  border: 1px solid var(--panel-border);
  border-radius: 8px;
  box-shadow: var(--shadow-lg);
  z-index: 100;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  transition: width var(--transition-normal), background-color var(--transition-normal), border-color var(--transition-normal);
  user-select: none;
}

.minimap-container.minimized {
  width: 110px;
}

.minimap-container.minimized .minimap-body {
  display: none;
}

.minimap-header {
  padding: 8px 12px;
  font-size: 10px;
  font-family: var(--font-mono);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-secondary);
  border-bottom: 1px solid var(--panel-border);
  display: flex;
  justify-content: space-between;
  align-items: center;
  background-color: var(--accent-bg-subtle);
}

.minimap-toggle-btn {
  background: transparent;
  border: none;
  color: var(--text-secondary);
  font-weight: bold;
  cursor: pointer;
  padding: 0 4px;
  font-size: 11px;
}

.minimap-toggle-btn:hover {
  color: var(--text-primary);
}

.minimap-body {
  height: 130px;
  padding: 8px;
  background-color: var(--bg-color);
  position: relative;
}

#minimap-svg {
  width: 100%;
  height: 100%;
  overflow: visible;
}

.minimap-node {
  fill: var(--text-muted);
  opacity: 0.55;
  stroke: var(--panel-border);
  stroke-width: 1px;
}

.minimap-node.selected {
  fill: #3b82f6;
  opacity: 0.85;
}

.minimap-connector {
  fill: none;
  stroke: var(--text-muted);
  stroke-width: 1.5px;
  opacity: 0.4;
}

/* Align and Distribute Panel Styles */
.align-btn-grid {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 4px;
  margin-top: 6px;
}

.distribute-btn-row {
  display: flex;
  gap: 6px;
  margin-top: 6px;
}

.align-btn {
  height: 28px;
  padding: 0;
  border: 1px solid var(--panel-border);
  background-color: var(--panel-bg);
  color: var(--text-primary);
  border-radius: 4px;
  cursor: pointer;
  display: flex;
  justify-content: center;
  align-items: center;
  transition: all var(--transition-fast);
}

.align-btn:hover {
  background-color: var(--accent-bg-subtle);
  border-color: var(--text-primary);
  color: var(--text-primary);
}

.align-btn svg {
  width: 16px;
  height: 16px;
}

/* Grid overlay background inside SVG */
.svg-grid-background {
  pointer-events: none;
}

/* Preset Color Buttons styling */
.preset-btn {
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

.preset-btn:hover {
  transform: scale(1.15);
  box-shadow: 0 0 0 2px var(--panel-bg), 0 0 0 4px var(--accent-color);
}

.preset-btn:active {
  transform: scale(0.95);
}

/* Animated Process Flow Overlay */
.connector-flow-animation {
  fill: none;
  stroke-dasharray: 4, 12;
  stroke-linecap: round;
  pointer-events: none;
  animation: flow-dash 1s linear infinite;
  opacity: 0.85;
}

@keyframes flow-dash {
  to {
    stroke-dashoffset: -16;
  }
}

/* Mobile Toggles & Overlay */
.mobile-toggle-btn {
  display: none;
  position: absolute;
  top: 80px; /* Below the canvas toolbar */
  z-index: 99;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background-color: var(--panel-bg);
  border: 1px solid var(--panel-border);
  color: var(--text-primary);
  box-shadow: var(--shadow-md);
  cursor: pointer;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-normal);
}

.mobile-toggle-btn:hover {
  background-color: var(--accent-bg-subtle);
}

.mobile-toggle-btn.left-toggle {
  left: 16px;
}

.mobile-toggle-btn.right-toggle {
  right: 16px;
}

.sidebar-overlay {
  display: none;
  position: absolute;
  top: 0; left: 0; right: 0; bottom: 0;
  background-color: rgba(0, 0, 0, 0.3);
  z-index: 90;
  transition: opacity var(--transition-normal);
}

@media (max-width: 768px) {
  .mobile-toggle-btn {
    display: flex;
  }
  
  .left-toolbar {
    position: absolute;
    top: 0;
    left: 0;
    bottom: 0;
    transform: translateX(-100%);
    transition: transform var(--transition-normal);
    z-index: 100;
    box-shadow: none;
  }
  
  .left-toolbar.open {
    transform: translateX(0);
    box-shadow: var(--shadow-lg);
  }
  
  .right-sidebar {
    position: absolute;
    top: 0;
    right: 0;
    bottom: 0;
    transform: translateX(100%);
    transition: transform var(--transition-normal);
    z-index: 100;
    box-shadow: none;
  }
  
  .right-sidebar.open {
    transform: translateX(0);
    box-shadow: var(--shadow-lg);
  }

  /* Make sure flowchart canvas fits on screen */
  #flowchart-svg {
    max-width: 90vw;
    max-height: 70vh;
  }
  
  /* Minimap floats above */
  .minimap-container {
    bottom: 12px;
    right: 12px;
    scale: 0.85;
    transform-origin: bottom right;
  }
}






/* ── Floating Navigation Pill ── */
.nav-pill {
  position: absolute;
  top: 14px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 50;
  display: flex;
  align-items: center;
  gap: 6px;
  background-color: var(--panel-bg);
  border: 1px solid var(--panel-border);
  border-radius: 30px;
  padding: 5px 8px 5px 12px;
  box-shadow: var(--shadow-md);
  transition: all var(--transition-normal, 0.22s);
  opacity: 0.75;
  pointer-events: auto;
  backdrop-filter: blur(8px);
}

.nav-pill:hover {
  opacity: 1;
  box-shadow: var(--shadow-lg);
}

.nav-pill-label {
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 600;
  color: var(--text-secondary);
  white-space: nowrap;
  user-select: none;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.nav-pill-btn {
  display: flex;
  align-items: center;
  gap: 5px;
  padding: 5px 10px;
  border-radius: 20px;
  border: none;
  font-size: 11px;
  font-weight: 600;
  font-family: var(--font-sans);
  cursor: pointer;
  transition: all 0.12s ease;
  white-space: nowrap;
}

.nav-pill-btn svg {
  width: 12px;
  height: 12px;
  flex-shrink: 0;
}

.nav-pill-btn.back-hub {
  background-color: var(--accent-bg-subtle);
  color: var(--text-primary);
}

.nav-pill-btn.back-hub:hover {
  background-color: var(--text-primary);
  color: var(--panel-bg);
}

.nav-pill-btn.open-standalone {
  background-color: var(--accent-color);
  color: var(--panel-bg);
}

.nav-pill-btn.open-standalone:hover {
  background-color: var(--accent-hover);
}

/* ── Mobile Toggle Buttons ── */
.mobile-toggle-btn {
  display: none;
  position: absolute;
  top: 16px;
  z-index: 99;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background-color: var(--panel-bg);
  border: 1px solid var(--panel-border);
  color: var(--text-primary);
  box-shadow: var(--shadow-md);
  cursor: pointer;
  align-items: center;
  justify-content: center;
  transition: all 0.22s cubic-bezier(0.4, 0, 0.2, 1);
}

.mobile-toggle-btn:hover {
  background-color: var(--accent-bg-subtle);
}

.mobile-toggle-btn.left-toggle {
  left: 16px;
}

.mobile-toggle-btn.right-toggle {
  right: 16px;
}

.sidebar-overlay {
  display: none;
  position: absolute;
  top: 0; left: 0; right: 0; bottom: 0;
  background-color: rgba(0, 0, 0, 0.3);
  z-index: 90;
}

/* ── Responsive breakpoints ── */
@media (max-width: 768px) {
  .mobile-toggle-btn {
    display: flex;
  }

  .left-toolbar {
    position: absolute;
    top: 0; left: 0; bottom: 0;
    transform: translateX(-100%);
    transition: transform 0.22s cubic-bezier(0.4, 0, 0.2, 1);
    z-index: 100;
    box-shadow: none;
  }

  .left-toolbar.open {
    transform: translateX(0);
    box-shadow: var(--shadow-lg);
  }

  .right-sidebar {
    position: absolute;
    top: 0; right: 0; bottom: 0;
    transform: translateX(100%);
    transition: transform 0.22s cubic-bezier(0.4, 0, 0.2, 1);
    z-index: 100;
    box-shadow: none;
  }

  .right-sidebar.open {
    transform: translateX(0);
    box-shadow: var(--shadow-lg);
  }

  .nav-pill {
    top: 10px;
    left: auto;
    right: 10px;
    transform: none;
    padding: 4px 6px 4px 8px;
  }

  .nav-pill-label {
    display: none;
  }

  .nav-pill-btn {
    font-size: 10px;
    padding: 4px 8px;
  }
}