:root {
  /* Premium Dark Theme - Startup Level */
  --bg-primary: #0a0f1e;
  --bg-secondary: #0f1729;
  --bg-tertiary: #1a2332;
  --surface: rgba(26, 35, 50, 0.8);
  --surface-glass: rgba(255, 255, 255, 0.05);
  --surface-elevated: rgba(26, 35, 50, 0.95);
  
  /* Vibrant Gradients */
  --gradient-primary: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  --gradient-secondary: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
  --gradient-success: linear-gradient(135deg, #11998e 0%, #38ef7d 100%);
  --gradient-info: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
  --gradient-hero: linear-gradient(135deg, #667eea 0%, #764ba2 50%, #f093fb 100%);
  --gradient-mesh: radial-gradient(at 40% 20%, rgba(102, 126, 234, 0.3) 0px, transparent 50%),
                   radial-gradient(at 80% 0%, rgba(118, 75, 162, 0.3) 0px, transparent 50%),
                   radial-gradient(at 0% 50%, rgba(240, 147, 251, 0.3) 0px, transparent 50%);
  
  /* Text Colors */
  --text-primary: #ffffff;
  --text-secondary: #b4c2d9;
  --text-muted: #7890ab;
  --text-inverse: #0a0f1e;
  
  /* Accent Colors */
  --accent-primary: #667eea;
  --accent-secondary: #764ba2;
  --accent-success: #38ef7d;
  --accent-warning: #ffd166;
  --accent-danger: #f5576c;
  --accent-info: #00f2fe;
  
  /* Node Colors */
  --node-core: #667eea;
  --node-gamedev: #11998e;
  --node-ml: #764ba2;
  --node-crypto: #f5576c;
  --node-engineering: #ff6b6b;
  --node-research: #f093fb;
  
  /* Effects */
  --shadow-xs: 0 1px 2px rgba(0, 0, 0, 0.2);
  --shadow-sm: 0 4px 8px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 8px 16px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 16px 32px rgba(0, 0, 0, 0.5);
  --shadow-xl: 0 24px 48px rgba(0, 0, 0, 0.6);
  --shadow-glow-primary: 0 0 30px rgba(102, 126, 234, 0.5);
  --shadow-glow-success: 0 0 30px rgba(56, 239, 125, 0.5);
  --shadow-glow-danger: 0 0 30px rgba(245, 87, 108, 0.5);
  
  /* Border Radius */
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --radius-full: 9999px;
  
  /* Transitions */
  --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-base: 300ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 500ms cubic-bezier(0.4, 0, 0.2, 1);
  --spring: cubic-bezier(0.34, 1.56, 0.64, 1);
  --bounce: cubic-bezier(0.68, -0.55, 0.265, 1.55);
  
  /* Spacing */
  --spacing-xs: 4px;
  --spacing-sm: 8px;
  --spacing-md: 16px;
  --spacing-lg: 24px;
  --spacing-xl: 32px;
  --spacing-2xl: 48px;
  --spacing-3xl: 64px;
}

body.light-theme {
  --bg-primary: #f8fafc;
  --bg-secondary: #ffffff;
  --bg-tertiary: #f1f5f9;
  --surface: rgba(255, 255, 255, 0.8);
  --surface-glass: rgba(0, 0, 0, 0.03);
  --surface-elevated: rgba(255, 255, 255, 0.95);
  
  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-muted: #94a3b8;
  --text-inverse: #ffffff;
  
  --shadow-xs: 0 1px 2px rgba(0, 0, 0, 0.05);
  --shadow-sm: 0 4px 8px rgba(0, 0, 0, 0.08);
  --shadow-md: 0 8px 16px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 16px 32px rgba(0, 0, 0, 0.12);
  --shadow-xl: 0 24px 48px rgba(0, 0, 0, 0.15);
}

/* Reset & Base */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Inter', 'Segoe UI', 'Roboto', 'Helvetica Neue', sans-serif;
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
  transition: background var(--transition-base), color var(--transition-base);
  position: relative;
}

body::before {
  content: '';
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: var(--gradient-mesh);
  opacity: 1;
  z-index: -1;
  pointer-events: none;
}

::selection {
  background: var(--accent-primary);
  color: white;
}

a {
  text-decoration: none;
  color: inherit;
  transition: all var(--transition-fast);
}

button {
  cursor: pointer;
  border: none;
  background: none;
  font-family: inherit;
  transition: all 400ms var(--spring);
  position: relative;
  overflow: hidden;
}

button:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

/* Glassmorphism Button */
.btn {
  padding: 14px 28px;
  border-radius: var(--radius-md);
  font-weight: 600;
  font-size: 15px;
  letter-spacing: 0.3px;
  display: inline-flex;
  align-items: center;
  gap: 10px;
  position: relative;
  z-index: 1;
  box-shadow: var(--shadow-sm);
  animation: fadeInUp 0.5s var(--spring) backwards;
}

.btn::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(135deg, rgba(255, 255, 255, 0.1), rgba(255, 255, 255, 0.05));
  opacity: 0;
  transition: opacity 200ms ease;
  z-index: -1;
}

.btn::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 0;
  height: 0;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.2);
  transform: translate(-50%, -50%);
  transition: width 600ms var(--spring), height 600ms var(--spring);
}

.btn:hover::before {
  opacity: 1;
}

.btn:hover {
  transform: translateY(-4px) scale(1.02);
  box-shadow: var(--shadow-lg);
}

.btn:active {
  transform: translateY(-1px) scale(0.98);
  transition: all 100ms ease;
}

.btn:active::after {
  width: 300px;
  height: 300px;
}

.btn-primary {
  background: var(--gradient-primary);
  color: white;
  box-shadow: var(--shadow-md);
}

.btn-primary:hover {
  box-shadow: var(--shadow-glow-primary);
}

.btn-success {
  background: var(--gradient-success);
  color: white;
}

.btn-success:hover {
  box-shadow: var(--shadow-glow-success);
}

.btn-danger {
  background: var(--gradient-secondary);
  color: white;
}

.btn-danger:hover {
  box-shadow: var(--shadow-glow-danger);
}

.btn-glass {
  background: var(--surface-glass);
  backdrop-filter: blur(20px);
  border: 1px solid rgba(255, 255, 255, 0.1);
  color: var(--text-primary);
}

.btn-glass:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: rgba(255, 255, 255, 0.2);
}

/* Theme Toggle */
.theme-btn {
  position: fixed;
  top: 24px;
  right: 24px;
  z-index: 1000;
  width: 56px;
  height: 56px;
  border-radius: var(--radius-full);
  background: var(--surface-glass);
  backdrop-filter: blur(20px);
  border: 1px solid rgba(255, 255, 255, 0.1);
  font-size: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-lg);
  transition: all 600ms var(--spring);
  animation: bounceIn 0.8s var(--bounce) backwards;
  animation-delay: 0.3s;
}

.theme-btn:hover {
  transform: rotate(180deg) scale(1.15);
  box-shadow: var(--shadow-xl);
  background: rgba(255, 255, 255, 0.15);
}

.theme-btn:active {
  transform: rotate(180deg) scale(0.9);
}

/* --- LANDING PAGE --- */
.hero {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: var(--spacing-3xl) var(--spacing-lg);
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(circle at 50% 50%, rgba(102, 126, 234, 0.15) 0%, transparent 70%);
  animation: float 20s ease-in-out infinite;
}

@keyframes float {
  0%, 100% {
    transform: translate(0, 0) rotate(0deg);
  }
  33% {
    transform: translate(30px, -30px) rotate(5deg);
  }
  66% {
    transform: translate(-20px, 20px) rotate(-5deg);
  }
}

.hero h1 {
  font-size: clamp(3rem, 8vw, 6rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.1;
  margin-bottom: var(--spacing-lg);
  background: var(--gradient-hero);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  animation: fadeInUp 0.8s var(--spring) backwards;
  background-clip: text;
  position: relative;
  z-index: 1;
  animation: fadeInUp 0.8s ease-out;
}

.hero .subtitle {
  font-size: clamp(1.25rem, 3vw, 1.75rem);
  color: var(--text-secondary);
  max-width: 700px;
  margin: 0 auto var(--spacing-2xl);
  font-weight: 400;
  position: relative;
  z-index: 1;
  animation: fadeInUp 0.8s ease-out 0.2s both;
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(40px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes bounceIn {
  0% {
    opacity: 0;
    transform: scale(0.3);
  }
  50% {
    opacity: 1;
    transform: scale(1.05);
  }
  70% {
    transform: scale(0.9);
  }
  100% {
    transform: scale(1);
  }
}

@keyframes slideInFromLeft {
  from {
    opacity: 0;
    transform: translateX(-100px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes scaleIn {
  from {
    opacity: 0;
    transform: scale(0.8);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}

.hero .cta-buttons {
  display: flex;
  gap: var(--spacing-md);
  justify-content: center;
  align-items: center;
  flex-wrap: wrap;
  position: relative;
  z-index: 1;
  animation: fadeInUp 0.8s ease-out 0.4s both;
  max-width: 900px;
  margin: 0 auto;
}

.btn-hero {
  font-size: 17px;
  padding: 18px 36px;
  transform: scale(1.05);
  box-shadow: var(--shadow-lg);
}

.btn-hero:hover {
  transform: translateY(-4px) scale(1.08);
  box-shadow: var(--shadow-glow-primary);
}

.hero .feature-tags {
  display: flex;
  gap: var(--spacing-md);
  justify-content: center;
  flex-wrap: wrap;
  margin-top: var(--spacing-2xl);
  position: relative;
  z-index: 1;
  animation: fadeInUp 0.8s ease-out 0.6s both;
}

.tag {
  padding: 8px 16px;
  border-radius: var(--radius-full);
  background: var(--surface-glass);
  backdrop-filter: blur(20px);
  border: 1px solid rgba(255, 255, 255, 0.1);
  font-size: 14px;
  font-weight: 500;
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  gap: 8px;
  transition: all 400ms var(--spring);
  animation: bounceIn 0.6s var(--bounce) backwards;
}

.tag:nth-child(1) { animation-delay: 0.7s; }
.tag:nth-child(2) { animation-delay: 0.75s; }
.tag:nth-child(3) { animation-delay: 0.8s; }
.tag:nth-child(4) { animation-delay: 0.85s; }

.tag:hover {
  transform: translateY(-4px) scale(1.05);
  border-color: var(--accent-primary);
  color: var(--text-primary);
}

.tag:active {
  transform: translateY(-2px) scale(1);
}

/* Cards Grid */
.grid {
  max-width: 1400px;
  margin: 0 auto;
  padding: var(--spacing-3xl) var(--spacing-lg);
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(360px, 1fr));
  gap: var(--spacing-xl);
}

#roadmaps .card:nth-child(1) { animation-delay: 0.2s; }
#roadmaps .card:nth-child(2) { animation-delay: 0.3s; }
#roadmaps .card:nth-child(3) { animation-delay: 0.4s; }
#roadmaps .card:nth-child(4) { animation-delay: 0.5s; }
#roadmaps .card:nth-child(5) { animation-delay: 0.6s; }
#roadmaps .card:nth-child(6) { animation-delay: 0.7s; }

.card {
  background: var(--surface-glass);
  backdrop-filter: blur(20px);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-xl);
  padding: var(--spacing-xl);
  position: relative;
  overflow: hidden;
  transition: all 500ms var(--spring);
  display: flex;
  flex-direction: column;
  box-shadow: var(--shadow-md);
  animation: scaleIn 0.6s var(--bounce) backwards;
}

.card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background: var(--gradient-primary);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition-base);
}

.card::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 300px;
  height: 300px;
  background: radial-gradient(circle, var(--accent-primary) 0%, transparent 70%);
  opacity: 0;
  transform: translate(-50%, -50%);
  transition: opacity var(--transition-slow);
  pointer-events: none;
}

.card:hover {
  transform: translateY(-12px) scale(1.02);
  border-color: rgba(255, 255, 255, 0.2);
  box-shadow: var(--shadow-xl);
}

.card:active {
  transform: translateY(-6px) scale(1);
  transition: all 100ms ease;
}

.card:hover::before {
  transform: scaleX(1);
}

.card:hover::after {
  opacity: 0.05;
}

.card-icon {
  font-size: 56px;
  margin-bottom: var(--spacing-lg);
  display: block;
  animation: float 3s ease-in-out infinite;
}

.card h3 {
  font-size: 1.75rem;
  font-weight: 700;
  margin-bottom: var(--spacing-md);
  color: var(--text-primary);
  letter-spacing: -0.02em;
}

.card p {
  color: var(--text-secondary);
  flex-grow: 1;
  line-height: 1.7;
  font-size: 15px;
}

.card-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: var(--spacing-lg);
  padding-top: var(--spacing-lg);
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.badge {
  padding: 6px 14px;
  border-radius: var(--radius-full);
  font-size: 12px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  background: var(--gradient-primary);
  color: white;
  box-shadow: var(--shadow-sm);
}

.status {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 8px;
  transition: all var(--transition-fast);
}

.status.started {
  color: var(--accent-success);
}

.status.started::before {
  content: '';
  width: 8px;
  height: 8px;
  background: var(--accent-success);
  border-radius: 50%;
  display: inline-block;
  margin-right: 4px;
  box-shadow: 0 0 8px var(--accent-success);
}

/* --- VIEWER --- */
.toolbar, .stats-panel {
  position: absolute;
  top: var(--spacing-lg);
  background: var(--surface-glass);
  backdrop-filter: blur(30px);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-lg);
  padding: var(--spacing-md) var(--spacing-lg);
  z-index: 100;
  box-shadow: var(--shadow-lg);
  transition: all 500ms var(--spring);
  animation: slideInFromLeft 0.6s var(--spring) backwards;
}

.stats-panel {
  animation: slideInFromLeft 0.6s var(--spring) backwards;
  animation-delay: 0.1s;
}

.toolbar {
  left: var(--spacing-lg);
  display: flex;
  gap: var(--spacing-md);
  align-items: center;
  flex-wrap: wrap;
}

.toolbar a {
  font-weight: 600;
  padding: 10px 16px;
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
}

.toolbar a:hover {
  background: rgba(255, 255, 255, 0.1);
}

.toolbar h3 {
  font-size: 1.25rem;
  font-weight: 700;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.stats-panel {
  right: 80px;
  text-align: right;
  min-width: 140px;
}

.stats-value {
  font-size: 32px;
  font-weight: 800;
  background: var(--gradient-info);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: var(--spacing-xs);
  line-height: 1;
}

.stats-label {
  font-size: 12px;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 1px;
  font-weight: 600;
}

#canvas-container {
  width: 100vw;
  height: 100vh;
  overflow: hidden;
  cursor: grab;
  background: var(--bg-primary);
  position: relative;
}

#canvas-container::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-image: 
    linear-gradient(rgba(102, 126, 234, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(102, 126, 234, 0.03) 1px, transparent 1px);
  background-size: 50px 50px;
  pointer-events: none;
  opacity: 0.5;
}

#canvas-container:active {
  cursor: grabbing;
}

/* Graph Nodes */
.node rect {
  fill: var(--bg-secondary);
  stroke: var(--accent-primary);
  stroke-width: 2.5px;
  rx: 14;
  transition: all 400ms var(--spring);
  filter: drop-shadow(0 4px 8px rgba(0, 0, 0, 0.3));
}

.node:hover rect {
  stroke-width: 3px;
  filter: drop-shadow(0 0 24px var(--accent-primary));
  transform: scale(1.08);
}

.node:active rect {
  transform: scale(1.02);
  transition: all 100ms ease;
}

.node.completed rect {
  fill: var(--bg-tertiary);
  stroke: var(--accent-success);
  stroke-width: 3px;
  filter: drop-shadow(0 0 20px var(--accent-success));
}

.node text {
  fill: var(--text-primary);
  font-size: 14px;
  font-weight: 600;
  text-anchor: middle;
  dominant-baseline: middle;
  pointer-events: none;
  letter-spacing: 0.3px;
}

.link {
  fill: none;
  stroke: var(--text-muted);
  stroke-width: 3px;
  opacity: 0.6;
  transition: all 400ms var(--spring);
  cursor: pointer;
}

.link:hover {
  stroke: var(--accent-primary);
  stroke-width: 5px;
  opacity: 1;
  filter: drop-shadow(0 0 10px var(--accent-primary));
}

.link.selected {
  stroke: var(--accent-danger);
  stroke-width: 5px;
  opacity: 1;
  filter: drop-shadow(0 0 12px var(--accent-danger));
}

/* Node Color Groups */
.node[data-group="core"] rect { stroke: var(--node-core); }
.node[data-group="gamedev"] rect { stroke: var(--node-gamedev); }
.node[data-group="ml"] rect { stroke: var(--node-ml); }
.node[data-group="crypto"] rect { stroke: var(--node-crypto); }
.node[data-group="engineering"] rect { stroke: var(--node-engineering); }
.node[data-group="research"] rect { stroke: var(--node-research); }

/* Side Panel */
.panel {
  position: fixed;
  top: 0;
  right: -500px;
  width: 460px;
  height: 100%;
  background: var(--surface-elevated);
  backdrop-filter: blur(30px);
  border-left: 1px solid rgba(255, 255, 255, 0.1);
  padding: var(--spacing-2xl);
  transition: all 600ms var(--spring);
  z-index: 1500;
  overflow-y: auto;
  box-shadow: -16px 0 48px rgba(0, 0, 0, 0.5);
}

.panel.active {
  right: 0;
}

.panel > * {
  animation: fadeInUp 0.5s var(--spring) backwards;
}

.panel > *:nth-child(1) { animation-delay: 0.1s; }
.panel > *:nth-child(2) { animation-delay: 0.15s; }
.panel > *:nth-child(3) { animation-delay: 0.2s; }
.panel > *:nth-child(4) { animation-delay: 0.25s; }

.panel h2 {
  font-size: 2rem;
  font-weight: 800;
  margin-bottom: var(--spacing-lg);
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  letter-spacing: -0.02em;
}

.panel-content {
  margin: var(--spacing-lg) 0;
  line-height: 1.8;
  color: var(--text-secondary);
}

.panel-content h1,
.panel-content h2,
.panel-content h3 {
  color: var(--text-primary);
  font-weight: 700;
  margin: var(--spacing-lg) 0 var(--spacing-md);
}

.panel-content p {
  margin-bottom: var(--spacing-md);
}

.panel-content ul,
.panel-content ol {
  margin-left: var(--spacing-lg);
  margin-bottom: var(--spacing-md);
}

.panel-content li {
  margin-bottom: var(--spacing-sm);
}

.panel-content code {
  background: var(--bg-tertiary);
  padding: 2px 8px;
  border-radius: var(--radius-sm);
  font-family: 'Monaco', 'Courier New', monospace;
  font-size: 0.9em;
  color: var(--accent-info);
}

.panel-content pre {
  background: var(--bg-tertiary);
  padding: var(--spacing-md);
  border-radius: var(--radius-md);
  overflow-x: auto;
  margin: var(--spacing-md) 0;
  border: 1px solid rgba(255, 255, 255, 0.1);
}

.panel-content pre code {
  background: none;
  padding: 0;
  color: var(--text-primary);
}

.close-btn {
  position: absolute;
  top: var(--spacing-lg);
  right: var(--spacing-lg);
  width: 48px;
  height: 48px;
  border-radius: var(--radius-full);
  background: rgba(255, 255, 255, 0.05);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 400ms var(--spring);
  font-size: 28px;
  color: var(--text-muted);
  transition: all var(--transition-fast);
}

.close-btn:hover {
  background: rgba(239, 68, 68, 0.2);
  color: var(--accent-danger);
  transform: rotate(90deg) scale(1.1);
  border: 1px solid var(--accent-danger);
}

.close-btn:active {
  transform: rotate(90deg) scale(0.9);
}

/* --- EDITOR --- */
.editor-layout {
  display: grid;
  grid-template-columns: 400px 1fr;
  height: 100vh;
}

#canvas-area {
  background: var(--bg-primary);
  position: relative;
  overflow: hidden;
  cursor: grab;
}

#canvas-area:active {
  cursor: grabbing;
}

.editor-toolbar {
  position: absolute;
  top: var(--spacing-lg);
  left: var(--spacing-lg);
  display: flex;
  gap: var(--spacing-md);
  align-items: center;
  z-index: 100;
}

.zoom-controls {
  position: absolute;
  bottom: var(--spacing-lg);
  right: var(--spacing-lg);
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
  z-index: 100;
}

.zoom-controls button {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-md);
  background: var(--surface-glass);
  backdrop-filter: blur(20px);
  border: 1px solid rgba(255, 255, 255, 0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  color: var(--text-primary);
  box-shadow: var(--shadow-md);
  transition: all 400ms var(--spring);
}

.zoom-controls button:hover {
  transform: scale(1.1);
  box-shadow: var(--shadow-lg);
}

.zoom-controls button:active {
  transform: scale(0.95);
  transition: all 100ms ease;
}

.node-counter {
  position: absolute;
  bottom: var(--spacing-lg);
  left: var(--spacing-lg);
  padding: var(--spacing-md) var(--spacing-lg);
  background: var(--surface-glass);
  backdrop-filter: blur(20px);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-md);
  font-size: 14px;
  color: var(--text-secondary);
  box-shadow: var(--shadow-md);
}

.node-counter strong {
  color: var(--accent-primary);
  font-weight: 700;
}

.properties-panel {
  background: var(--surface-elevated);
  backdrop-filter: blur(30px);
  border-left: 1px solid rgba(255, 255, 255, 0.1);
  padding: var(--spacing-xl);
  display: flex;
  flex-direction: column;
  gap: var(--spacing-lg);
  overflow-y: auto;
  box-shadow: -8px 0 32px rgba(0, 0, 0, 0.3);
}

.properties-panel h2 {
  font-size: 1.75rem;
  font-weight: 800;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}

.form-group label {
  font-size: 11px;
  color: var(--text-muted);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1px;
}

.form-group input,
.form-group textarea,
.form-group select {
  background: var(--bg-tertiary);
  border: 2px solid rgba(255, 255, 255, 0.1);
  color: var(--text-primary);
  padding: 14px;
  border-radius: var(--radius-md);
  font-family: inherit;
  font-size: 14px;
  transition: all 400ms var(--spring);
}

.form-group input:hover,
.form-group textarea:hover,
.form-group select:hover {
  border-color: rgba(255, 255, 255, 0.2);
  transform: translateY(-2px);
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
  outline: none;
  border-color: var(--accent-primary);
  box-shadow: 0 0 0 4px rgba(102, 126, 234, 0.1);
  transform: scale(1.01);
}

.form-group textarea {
  resize: vertical;
  min-height: 120px;
  font-family: 'Monaco', 'Courier New', monospace;
  line-height: 1.6;
}

.info-box {
  padding: var(--spacing-md);
  background: rgba(102, 126, 234, 0.1);
  border-radius: var(--radius-md);
  border: 1px solid var(--accent-primary);
  font-size: 13px;
  line-height: 1.6;
  color: var(--text-secondary);
}

.info-box b {
  color: var(--accent-primary);
  font-weight: 700;
}

/* Editor Node Styles */
.node rect.body {
  cursor: move;
  fill: var(--bg-secondary);
  stroke: var(--accent-primary);
  stroke-width: 2.5px;
  transition: all var(--transition-base);
  filter: drop-shadow(0 4px 8px rgba(0, 0, 0, 0.3));
}

.node:hover rect.body {
  stroke-width: 3px;
  filter: drop-shadow(0 0 20px var(--accent-primary));
}

.node.selected rect.body {
  stroke: var(--accent-success);
  stroke-width: 4px;
  filter: drop-shadow(0 0 24px var(--accent-success));
}

.port {
  fill: var(--bg-tertiary);
  stroke: var(--text-muted);
  stroke-width: 2.5px;
  cursor: crosshair;
  transition: all 400ms var(--spring);
  r: 6px;
}

.port:hover {
  fill: var(--accent-success);
  stroke: var(--accent-success);
  r: 10px;
  filter: drop-shadow(0 0 12px var(--accent-success));
  animation: pulse 1s var(--spring) infinite;
}

@keyframes pulse {
  0%, 100% {
    r: 10px;
  }
  50% {
    r: 11px;
  }
}

.link {
  stroke: var(--text-muted);
  stroke-width: 2.5px;
  fill: none;
  pointer-events: stroke;
  opacity: 0.5;
  transition: all 400ms var(--spring);
}

.link:hover {
  stroke: var(--accent-danger);
  stroke-width: 4px;
  opacity: 1;
  cursor: no-drop;
}

.temp-link {
  stroke: var(--accent-success);
  stroke-width: 3px;
  stroke-dasharray: 10, 5;
  fill: none;
  pointer-events: none;
  opacity: 0.8;
  animation: dashAnimation 1s linear infinite;
}

@keyframes dashAnimation {
  to {
    stroke-dashoffset: -15;
  }
}

/* Scrollbar */
::-webkit-scrollbar {
  width: 12px;
  height: 12px;
}

::-webkit-scrollbar-track {
  background: var(--bg-secondary);
}

::-webkit-scrollbar-thumb {
  background: var(--surface-glass);
  border-radius: var(--radius-sm);
  border: 2px solid var(--bg-secondary);
}

::-webkit-scrollbar-thumb:hover {
  background: rgba(255, 255, 255, 0.15);
}

/* Loading */
.loading {
  display: inline-block;
  width: 24px;
  height: 24px;
  border: 3px solid rgba(255, 255, 255, 0.1);
  border-top-color: var(--accent-primary);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

/* Responsive */
@media (max-width: 768px) {
  .grid {
    grid-template-columns: 1fr;
    padding: var(--spacing-lg);
  }
  
  .editor-layout {
    grid-template-columns: 1fr;
  }
  
  .properties-panel {
    position: fixed;
    bottom: -100%;
    left: 0;
    right: 0;
    height: 60vh;
    border-left: none;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    transition: bottom var(--transition-base);
  }
  
  .properties-panel.active {
    bottom: 0;
  }
  
  .panel {
    width: 100%;
    right: -100%;
  }
  
  .hero h1 {
    font-size: clamp(2.5rem, 10vw, 4rem);
  }
}

/* Utility Classes */
.text-gradient {
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.glass {
  background: var(--surface-glass);
  backdrop-filter: blur(20px);
  border: 1px solid rgba(255, 255, 255, 0.1);
}

.elevated {
  box-shadow: var(--shadow-xl);
}