:root {
  /* Color Palette - Technical & Sharp */
  --bg-primary: #0a0a0c;
  --bg-secondary: #141417;
  --bg-tertiary: #1c1c21;
  --accent-primary: #00f2ff;
  --accent-secondary: #7000ff;
  --text-primary: #ffffff;
  --text-secondary: #a1a1aa;
  --border-subtle: rgba(255, 255, 255, 0.1);
  --border-bright: rgba(0, 242, 255, 0.3);
  
  /* Spacing */
  --space-xs: 4px;
  --space-sm: 8px;
  --space-md: 16px;
  --space-lg: 24px;
  --space-xl: 48px;
  --space-2xl: 80px;

  /* Typography */
  --font-main: 'JetBrains Mono', monospace;
}

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

body {
  background-color: var(--bg-primary);
  color: var(--text-primary);
  font-family: var(--font-main);
  line-height: 1.5;
  overflow-x: hidden;
  min-height: 100vh;
}

/* Layout */
.app-container {
  display: grid;
  grid-template-columns: 280px 1fr 320px;
  height: 100vh;
  width: 100vw;
}

/* Sidebar Styling */
.sidebar {
  background-color: var(--bg-secondary);
  border-right: 1px solid var(--border-subtle);
  display: flex;
  flex-direction: column;
  padding: var(--space-md);
}

.sidebar-header {
  padding-bottom: var(--space-lg);
  border-bottom: 1px solid var(--border-subtle);
  margin-bottom: var(--space-lg);
}

.logo {
  font-size: 1.2rem;
  font-weight: 800;
  letter-spacing: -1px;
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.logo-icon {
  width: 24px;
  height: 24px;
  background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
  clip-path: polygon(50% 0%, 100% 50%, 50% 100%, 0% 50%);
}

.sidebar-section {
  margin-bottom: var(--space-xl);
}

.sidebar-label {
  font-size: 0.7rem;
  text-transform: uppercase;
  color: var(--text-secondary);
  letter-spacing: 2px;
  margin-bottom: var(--space-md);
  display: block;
}

.shape-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-sm);
}

.shape-item {
  background: var(--bg-tertiary);
  border: 1px solid var(--border-subtle);
  height: 80px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all 0.2s ease;
  border-radius: 4px;
}

.shape-item:hover {
  border-color: var(--accent-primary);
  background: rgba(0, 242, 255, 0.05);
}

.shape-preview {
  width: 32px;
  height: 32px;
  border: 1px solid var(--text-secondary);
  margin-bottom: var(--space-xs);
}

.shape-preview.circle { border-radius: 50%; }
.shape-preview.rhombus { transform: rotate(45deg) scale(0.7); }

.shape-name {
  font-size: 0.65rem;
  color: var(--text-secondary);
}

/* Main Canvas Area */
.canvas-wrapper {
  background-color: var(--bg-primary);
  background-image: 
    linear-gradient(rgba(255,255,255,0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.03) 1px, transparent 1px);
  background-size: 40px 40px;
  position: relative;
  overflow: auto;
  display: flex;
  align-items: center;
  justify-content: center;
}

.canvas-controls {
  position: absolute;
  bottom: var(--space-lg);
  left: 50%;
  transform: translateX(-50%);
  background: var(--bg-secondary);
  padding: var(--space-sm) var(--space-lg);
  border-radius: 100px;
  border: 1px solid var(--border-subtle);
  display: flex;
  gap: var(--space-lg);
  box-shadow: 0 10px 30px rgba(0,0,0,0.5);
  z-index: 100;
}

.control-btn {
  background: none;
  border: none;
  color: var(--text-secondary);
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-family: inherit;
  font-size: 0.8rem;
}

.control-btn:hover {
  color: var(--accent-primary);
}

/* Diagram Elements */
.diagram-stage {
  width: 2000px;
  height: 2000px;
  position: relative;
}

.node {
  position: absolute;
  padding: var(--space-md) var(--space-lg);
  background: var(--bg-secondary);
  border: 1px solid var(--border-bright);
  box-shadow: 0 0 20px rgba(0, 242, 255, 0.1);
  min-width: 140px;
  text-align: center;
  z-index: 2;
}

.node.diamond {
  width: 120px;
  height: 120px;
  display: flex;
  align-items: center;
  justify-content: center;
  transform: rotate(45deg);
  border-color: var(--accent-secondary);
}

.node.diamond .node-content {
  transform: rotate(-45deg);
}

.connector {
  position: absolute;
  background: var(--accent-primary);
  z-index: 1;
}

.connector.v { width: 2px; }
.connector.h { height: 2px; }

.arrowhead {
  position: absolute;
  width: 0;
  height: 0;
  border-left: 6px solid transparent;
  border-right: 6px solid transparent;
  border-top: 10px solid var(--accent-primary);
}

/* Inspector Panel */
.inspector {
  background-color: var(--bg-secondary);
  border-left: 1px solid var(--border-subtle);
  padding: var(--space-md);
}

.inspector-field {
  margin-bottom: var(--space-lg);
}

.field-label {
  font-size: 0.7rem;
  color: var(--text-secondary);
  margin-bottom: var(--space-sm);
  display: block;
}

.input-group {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-sm);
}

.text-input {
  width: 100%;
  background: var(--bg-tertiary);
  border: 1px solid var(--border-subtle);
  color: var(--text-primary);
  padding: var(--space-sm);
  font-family: inherit;
  font-size: 0.8rem;
}

.btn-primary {
  background: var(--accent-primary);
  color: var(--bg-primary);
  border: none;
  padding: var(--space-sm) var(--space-lg);
  font-weight: bold;
  cursor: pointer;
  width: 100%;
  margin-top: var(--space-lg);
}

.btn-primary:hover {
  filter: brightness(1.2);
}

/* Animations */
@keyframes pulse {
  0% { opacity: 0.6; }
  50% { opacity: 1; }
  100% { opacity: 0.6; }
}

.active-path {
  animation: pulse 2s infinite;
}

/* Summary Page Styles */
.summary-page {
  max-width: 1000px;
  margin: 0 auto;
  padding: var(--space-2xl) var(--space-md);
}

.flow-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border-subtle);
  padding: var(--space-xl);
  margin-bottom: var(--space-lg);
  display: grid;
  grid-template-columns: 100px 1fr auto;
  align-items: center;
  gap: var(--space-lg);
}

.step-num {
  font-size: 3rem;
  font-weight: 900;
  color: var(--accent-primary);
  opacity: 0.3;
}

.flow-meta {
  color: var(--text-secondary);
  font-size: 0.9rem;
  margin-top: var(--space-md);
}

.back-link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  color: var(--accent-primary);
  text-decoration: none;
  margin-bottom: var(--space-xl);
}

.badge {
  padding: 4px 12px;
  border-radius: 4px;
  font-size: 0.75rem;
  font-weight: bold;
}

.badge-input { background: var(--accent-primary); color: black; }
.badge-logic { border: 1px solid var(--accent-secondary); color: var(--accent-secondary); }
.badge-persist { background: var(--bg-tertiary); color: var(--text-secondary); }