@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800;900&family=JetBrains+Mono:wght@400;500;600;700&family=Orbitron:wght@400;500;600;700;800;900&display=swap');

:root {
  /* Enhanced Color Palette */
  --primary-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 50%, #667eea 100%);
  --secondary-gradient: linear-gradient(135deg, #f093fb 0%, #f5576c 50%, #c471ed 100%);
  --accent-gradient: linear-gradient(135deg, #4facfe 0%, #00f2fe 50%, #43e97b 100%);
  --success-gradient: linear-gradient(135deg, #11998e 0%, #38ef7d 50%, #20bf6b 100%);
  --warning-gradient: linear-gradient(135deg, #f7971e 0%, #ffd200 50%, #f39801 100%);
  --danger-gradient: linear-gradient(135deg, #fc4a1a 0%, #f7b733 50%, #ff6b6b 100%);
  --cosmic-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 25%, #f093fb 50%, #4facfe 75%, #00f2fe 100%);
  
  /* Advanced Background System */
  --dark-bg: radial-gradient(ellipse at top, #0f0f23 0%, #0a0a0f 70%);
  --surface: rgba(26, 26, 46, 0.8);
  --surface-light: rgba(22, 33, 62, 0.9);
  --surface-lighter: rgba(36, 59, 83, 0.8);
  --glass: rgba(255, 255, 255, 0.02);
  --glass-strong: rgba(255, 255, 255, 0.08);
  --glass-border: rgba(255, 255, 255, 0.12);
  --glass-hover: rgba(255, 255, 255, 0.15);
  
  /* Dynamic Text Colors */
  --text-primary: #ffffff;
  --text-secondary: #e2e8f0;
  --text-muted: #94a3b8;
  --text-accent: #64748b;
  
  /* Neon Accent Colors */
  --neon-blue: #00d4ff;
  --neon-purple: #8b5cf6;
  --neon-pink: #ec4899;
  --neon-green: #10b981;
  --neon-yellow: #f59e0b;
  --neon-orange: #f97316;
  --neon-cyan: #06b6d4;
  
  /* Advanced Shadows with Multiple Layers */
  --shadow-soft: 0 2px 8px rgba(0, 0, 0, 0.08);
  --shadow-medium: 0 8px 32px rgba(0, 0, 0, 0.12);
  --shadow-strong: 0 16px 64px rgba(0, 0, 0, 0.16);
  --shadow-extreme: 0 32px 128px rgba(0, 0, 0, 0.24);
  --shadow-neon-blue: 0 0 40px rgba(0, 212, 255, 0.4), 0 0 80px rgba(0, 212, 255, 0.2);
  --shadow-neon-pink: 0 0 40px rgba(240, 147, 251, 0.4), 0 0 80px rgba(240, 147, 251, 0.2);
  --shadow-neon-green: 0 0 40px rgba(16, 185, 129, 0.4), 0 0 80px rgba(16, 185, 129, 0.2);
  
  /* Dynamic Border Radius */
  --radius-xs: 4px;
  --radius-sm: 8px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --radius-xl: 32px;
  --radius-2xl: 48px;
  --radius-full: 9999px;
  
  /* Advanced Transitions */
  --transition-lightning: all 0.1s cubic-bezier(0.23, 1, 0.320, 1);
  --transition-fast: all 0.2s cubic-bezier(0.23, 1, 0.320, 1);
  --transition-base: all 0.4s cubic-bezier(0.23, 1, 0.320, 1);
  --transition-slow: all 0.6s cubic-bezier(0.23, 1, 0.320, 1);
  --transition-elastic: all 0.5s cubic-bezier(0.68, -0.55, 0.265, 1.55);
  
  /* Typography System */
  --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', 'SF Mono', monospace;
  --font-display: 'Orbitron', 'Inter', sans-serif;
  
  /* Spacing Scale */
  --space-0: 0;
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --space-24: 6rem;
}

/* Global Reset and Base Styles */
*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
  line-height: 1.6;
}

body {
  font-family: var(--font-primary);
  background: var(--dark-bg);
  color: var(--text-primary);
  min-height: 100vh;
  overflow-x: hidden;
  position: relative;
}

/* Advanced Animated Background System */
body::before {
  content: '';
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: 
    radial-gradient(circle at 20% 50%, rgba(103, 126, 234, 0.15) 0%, transparent 50%),
    radial-gradient(circle at 80% 20%, rgba(240, 147, 251, 0.12) 0%, transparent 50%),
    radial-gradient(circle at 40% 80%, rgba(79, 172, 254, 0.10) 0%, transparent 50%),
    radial-gradient(circle at 60% 40%, rgba(16, 185, 129, 0.08) 0%, transparent 50%);
  animation: cosmic-drift 30s ease-in-out infinite;
  pointer-events: none;
  z-index: 0;
}

/* Animated Grid Overlay */
body::after {
  content: '';
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-image: 
    linear-gradient(rgba(255, 255, 255, 0.02) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.02) 1px, transparent 1px);
  background-size: 60px 60px;
  animation: grid-pulse 15s linear infinite;
  pointer-events: none;
  z-index: 1;
}

@keyframes cosmic-drift {
  0%, 100% { 
    transform: translateY(0) rotate(0deg); 
    opacity: 1;
  }
  33% { 
    transform: translateY(-30px) rotate(2deg); 
    opacity: 0.8;
  }
  66% { 
    transform: translateY(20px) rotate(-1deg); 
    opacity: 0.9;
  }
}

@keyframes grid-pulse {
  0%, 100% { 
    opacity: 0.3; 
    transform: translate(0, 0) scale(1);
  }
  50% { 
    opacity: 0.1; 
    transform: translate(30px, 30px) scale(1.02);
  }
}

/* Landing Animation System */
@keyframes fade-in-up {
  from {
    opacity: 0;
    transform: translateY(40px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fade-in-left {
  from {
    opacity: 0;
    transform: translateX(-60px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes fade-in-right {
  from {
    opacity: 0;
    transform: translateX(60px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

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

/* Builder Container with Landing Animation */
.builder-container {
  display: flex;
  gap: 2rem;
  padding: 4rem 2rem;
  max-width: 1400px;
  margin: auto;
}

/* Enhanced Toolbox */
.toolbox {
  flex: 0 0 400px;
  background: var(--glass);
  backdrop-filter: blur(32px) saturate(180%);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-xl);
  padding: var(--space-10);
  box-shadow: var(--shadow-strong);
  position: relative;
  overflow: hidden;
  transition: var(--transition-base);
  height: fit-content;
  max-height: calc(100vh - 4rem);
  overflow-y: auto;
  animation: fade-in-left 0.8s ease-out 0.2s both;
}

/* Dynamic Border Glow Effect */
.toolbox::before {
  content: '';
  position: absolute;
  top: -2px;
  left: -2px;
  right: -2px;
  bottom: -2px;
  background: var(--cosmic-gradient);
  border-radius: var(--radius-xl);
  opacity: 0;
  transition: var(--transition-base);
  z-index: -1;
  animation: border-glow 4s ease-in-out infinite;
}

@keyframes border-glow {
  0%, 100% { opacity: 0; }
  50% { opacity: 0.3; }
}

/* Floating Animation for Toolbox */
.toolbox::after {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: conic-gradient(from 0deg, transparent, rgba(103, 126, 234, 0.1), transparent);
  animation: cosmic-rotate 20s linear infinite;
  z-index: -1;
}

@keyframes cosmic-rotate {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

.toolbox:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-extreme), var(--shadow-neon-blue);
  border-color: rgba(255, 255, 255, 0.25);
}

.toolbox:hover::before {
  opacity: 0.6;
}

/* Elegant Toolbox Title */
.toolbox h3 {
  font-family: var(--font-display);
  font-size: clamp(32px, 5vw, 42px);
  font-weight: 800;
  text-align: center;
  margin-bottom: var(--space-12);
  background: var(--secondary-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  position: relative;
  letter-spacing: -0.02em;
  animation: text-glow 3s ease-in-out infinite;
}

@keyframes text-glow {
  0%, 100% { 
    filter: drop-shadow(0 0 10px rgba(240, 147, 251, 0.3));
  }
  50% { 
    filter: drop-shadow(0 0 20px rgba(240, 147, 251, 0.5));
  }
}

.toolbox h3::after {
  content: '';
  position: absolute;
  bottom: -16px;
  left: 50%;
  transform: translateX(-50%);
  width: 100px;
  height: 4px;
  background: var(--secondary-gradient);
  border-radius: var(--radius-full);
  animation: pulse-glow 2s ease-in-out infinite;
}

@keyframes pulse-glow {
  0%, 100% { 
    opacity: 0.6; 
    transform: translateX(-50%) scaleX(1); 
    box-shadow: 0 0 20px rgba(240, 147, 251, 0.3);
  }
  50% { 
    opacity: 1; 
    transform: translateX(-50%) scaleX(1.3); 
    box-shadow: 0 0 30px rgba(240, 147, 251, 0.6);
  }
}

/* Enhanced Draggable Elements */
.draggable {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-6) var(--space-8);
  margin: var(--space-5) 0;
  background: var(--glass-strong);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  color: var(--text-primary);
  cursor: grab;
  transition: var(--transition-elastic);
  font-weight: 600;
  font-size: 15px;
  position: relative;
  overflow: hidden;
  user-select: none;
  backdrop-filter: blur(20px) saturate(150%);
}

/* Shimmer Effect for Draggables */
.draggable::before {
  content: '';
  position: absolute;
  top: 0;
  left: -150%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
  transition: left 0.8s cubic-bezier(0.23, 1, 0.320, 1);
}

.draggable:hover::before {
  left: 150%;
}

.draggable:hover {
  background: var(--glass-hover);
  border-color: var(--neon-blue);
  transform: translateY(-4px) translateX(8px) scale(1.02);
  box-shadow: var(--shadow-strong), var(--shadow-neon-blue);
}

.draggable:active {
  cursor: grabbing;
  transform: scale(0.98) rotate(2deg);
}

/* Draggable Content */
.draggable-icon {
  font-size: 20px;
  margin-right: var(--space-3);
  opacity: 0.9;
  transition: var(--transition-fast);
  filter: drop-shadow(0 0 5px rgba(255, 255, 255, 0.3));
}

.draggable:hover .draggable-icon {
  opacity: 1;
  transform: scale(1.1);
  filter: drop-shadow(0 0 10px rgba(0, 212, 255, 0.6));
}

.draggable-text {
  flex: 1;
  text-align: left;
  font-weight: 500;
}

.draggable-handle {
  opacity: 0.4;
  font-size: 14px;
  transition: var(--transition-fast);
  font-family: var(--font-mono);
}

.draggable:hover .draggable-handle {
  opacity: 1;
  color: var(--neon-blue);
  transform: scale(1.1);
}

/* Enhanced Form Builder */
.form-builder {
  flex: 1;
  background: var(--glass);
  backdrop-filter: blur(32px) saturate(180%);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-xl);
  padding: var(--space-10);
  box-shadow: var(--shadow-strong);
  position: relative;
  overflow: hidden;
  transition: var(--transition-base);
  animation: fade-in-right 0.8s ease-out 0.4s both;
}

/* Form Builder Glow Effect */
.form-builder::before {
  content: '';
  position: absolute;
  top: -2px;
  left: -2px;
  right: -2px;
  bottom: -2px;
  background: var(--primary-gradient);
  border-radius: var(--radius-xl);
  opacity: 0;
  transition: var(--transition-base);
  z-index: -1;
  animation: border-glow 4s ease-in-out infinite 2s;
}

.form-builder:hover {
  border-color: rgba(255, 255, 255, 0.3);
  box-shadow: var(--shadow-extreme), var(--shadow-neon-pink);
  transform: translateY(-4px);
}

.form-builder:hover::before {
  opacity: 0.4;
}

/* Form Builder Title */
.form-builder h3 {
  font-family: var(--font-display);
  font-size: clamp(32px, 5vw, 42px);
  font-weight: 800;
  text-align: center;
  margin-bottom: var(--space-12);
  background: var(--primary-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  position: relative;
  letter-spacing: -0.02em;
  animation: text-glow 3s ease-in-out infinite 1s;
}

.form-builder h3::after {
  content: '';
  position: absolute;
  bottom: -16px;
  left: 50%;
  transform: translateX(-50%);
  width: 120px;
  height: 4px;
  background: var(--primary-gradient);
  border-radius: var(--radius-full);
  animation: pulse-glow 2s ease-in-out infinite 0.5s;
  box-shadow: 0 0 20px rgba(103, 126, 234, 0.4);
}

/* Enhanced Form Elements */
.form-element {
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  padding: var(--space-8);
  margin: var(--space-6) 0;
  position: relative;
  transition: var(--transition-base);
  backdrop-filter: blur(24px) saturate(150%);
  box-shadow: var(--shadow-medium);
  animation: scale-in 0.6s ease-out;
}

.form-element::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 6px;
  height: 100%;
  background: var(--accent-gradient);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  opacity: 0;
  transition: var(--transition-base);
  transform: scaleY(0);
}

.form-element:hover {
  background: rgba(255, 255, 255, 0.08);
  border-color: var(--neon-purple);
  transform: translateY(-4px);
  box-shadow: var(--shadow-strong), 0 0 40px rgba(139, 92, 246, 0.2);
}

.form-element:hover::before {
  opacity: 1;
  transform: scaleY(1);
}

/* Advanced Input Styles */
.form-element input,
.form-element textarea,
.form-element select {
  width: 100%;
  background: var(--surface);
  border: 2px solid var(--glass-border);
  border-radius: var(--radius-md);
  padding: var(--space-6);
  color: var(--text-primary);
  font-family: var(--font-primary);
  font-size: 16px;
  font-weight: 500;
  transition: var(--transition-base);
  outline: none;
  backdrop-filter: blur(16px);
}

.form-element input:focus,
.form-element textarea:focus,
.form-element select:focus {
  border-color: var(--neon-blue);
  background: var(--surface-light);
  box-shadow: 
    0 0 0 6px rgba(0, 212, 255, 0.1),
    inset 0 0 0 1px rgba(0, 212, 255, 0.2),
    var(--shadow-neon-blue);
  transform: translateY(-2px) scale(1.01);
}

.form-element input::placeholder,
.form-element textarea::placeholder {
  color: var(--text-muted);
  font-style: italic;
  font-weight: 400;
}

.form-element textarea {
  min-height: 140px;
  resize: vertical;
  font-family: var(--font-primary);
  line-height: 1.6;
}

/* Enhanced Label Styles */
.label-edit {
  background: transparent;
  border: none;
  color: var(--text-primary);
  font-size: 18px;
  font-weight: 700;
  margin-bottom: var(--space-4);
  width: 100%;
  padding: var(--space-3);
  border-bottom: 3px solid transparent;
  transition: var(--transition-base);
  font-family: var(--font-primary);
}

.label-edit:focus {
  border-bottom-color: var(--neon-blue);
  outline: none;
  background: linear-gradient(135deg, rgba(0, 212, 255, 0.05), rgba(0, 212, 255, 0.02));
  border-radius: var(--radius-sm) var(--radius-sm) 0 0;
  box-shadow: 0 4px 20px rgba(0, 212, 255, 0.2);
}

/* Dynamic Heading Styles */
.bigHeadDiv,
.smallHeadDiv,
.paragraphDiv {
  display: flex;
  align-items: center;
  width: 100%;
  margin: var(--space-8) 0;
  position: relative;
}

.bigHeadDiv input {
  font-family: var(--font-display);
  font-size: clamp(28px, 6vw, 48px);
  font-weight: 900;
  background: transparent;
  border: none;
  border-bottom: 4px solid var(--glass-border);
  color: var(--text-primary);
  text-align: center;
  width: 100%;
  padding: var(--space-6);
  transition: var(--transition-base);
  letter-spacing: -0.02em;
}

.smallHeadDiv input {
  font-family: var(--font-display);
  font-size: clamp(20px, 4vw, 32px);
  font-weight: 800;
  background: transparent;
  border: none;
  border-bottom: 3px solid var(--glass-border);
  color: var(--text-primary);
  text-align: center;
  width: 100%;
  padding: var(--space-5);
  transition: var(--transition-base);
  letter-spacing: -0.01em;
}

.paragraphDiv input {
  font-size: 17px;
  font-weight: 500;
  background: transparent;
  border: none;
  border-bottom: 2px solid var(--glass-border);
  color: var(--text-secondary);
  text-align: center;
  width: 100%;
  padding: var(--space-4);
  transition: var(--transition-base);
  line-height: 1.6;
}

.bigHeadDiv input:focus,
.smallHeadDiv input:focus,
.paragraphDiv input:focus {
  border-bottom-color: var(--neon-blue);
  outline: none;
  background: linear-gradient(135deg, rgba(0, 212, 255, 0.05), rgba(0, 212, 255, 0.02));
  box-shadow: 0 8px 32px rgba(0, 212, 255, 0.2);
  transform: translateY(-2px);
}

/* Enhanced Options Container */
.options-container {
  margin: var(--space-6) 0;
  padding: var(--space-6);
  background: rgba(255, 255, 255, 0.02);
  border-radius: var(--radius-lg);
  border: 1px solid var(--glass-border);
  backdrop-filter: blur(16px);
  position: relative;
  overflow: hidden;
}

.options-container::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--accent-gradient);
  opacity: 0.6;
}

.option-edit {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  margin-bottom: var(--space-4);
  padding: var(--space-4);
  background: var(--surface);
  border-radius: var(--radius-md);
  transition: var(--transition-base);
  position: relative;
  overflow: hidden;
}

.option-edit::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  width: 4px;
  height: 100%;
  background: var(--neon-purple);
  opacity: 0;
  transition: var(--transition-base);
  transform: scaleY(0);
}

.option-edit:hover {
  background: var(--surface-light);
  transform: translateX(8px);
  box-shadow: var(--shadow-medium);
}

.option-edit:hover::before {
  opacity: 1;
  transform: scaleY(1);
}

.option-edit input {
  flex: 1;
  background: transparent;
  border: 2px solid var(--glass-border);
  border-radius: var(--radius-sm);
  padding: var(--space-3) var(--space-4);
  color: var(--text-primary);
  font-size: 15px;
  font-weight: 500;
  transition: var(--transition-base);
}

.option-edit input:focus {
  border-color: var(--neon-purple);
  background: rgba(139, 92, 246, 0.05);
  box-shadow: 0 0 0 4px rgba(139, 92, 246, 0.1);
}

/* Enhanced Button System */
button {
  background: var(--danger-gradient);
  border: none;
  border-radius: var(--radius-md);
  color: white;
  cursor: pointer;
  font-weight: 700;
  font-size: 13px;
  padding: var(--space-3) var(--space-5);
  transition: var(--transition-elastic);
  position: relative;
  overflow: hidden;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  box-shadow: var(--shadow-medium);
}

button::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.3), transparent);
  transition: left 0.6s cubic-bezier(0.23, 1, 0.320, 1);
}

button:hover::before {
  left: 100%;
}

button:hover {
  transform: translateY(-3px) scale(1.05);
  box-shadow: var(--shadow-strong);
}

button:active {
  transform: translateY(-1px) scale(1.02);
}

/* Spectacular Submit Button */
.submit-button {
  background: var(--success-gradient);
  border-radius: var(--radius-lg);
  font-size: 18px;
  font-weight: 800;
  font-family: var(--font-display);
  padding: var(--space-6) var(--space-12);
  margin: var(--space-12) auto;
  display: block;
  min-width: 240px;
  position: relative;
  overflow: hidden;
  box-shadow: var(--shadow-strong);
  text-transform: uppercase;
  letter-spacing: 1px;
  border: 2px solid transparent;
}

.submit-button::after {
  content: '';
  position: absolute;
  top: -2px;
  left: -2px;
  right: -2px;
  bottom: -2px;
  background: var(--success-gradient);
  border-radius: var(--radius-lg);
  z-index: -1;
  opacity: 0;
  transition: var(--transition-base);
}

.submit-button:hover {
  transform: translateY(-6px) scale(1.02);
  box-shadow: var(--shadow-extreme), var(--shadow-neon-green);
  border-color: var(--neon-green);
}

.submit-button:hover::after {
  opacity: 0.3;
}

/* Advanced Dragging States */
.dragging {
  opacity: 0.9;
  transform: rotate(5deg) scale(1.08);
  border: 3px dashed var(--neon-blue);
  background: rgba(0, 212, 255, 0.15) !important;
  box-shadow: var(--shadow-extreme), var(--shadow-neon-blue);
  animation: drag-float 0.8s ease-in-out infinite;
  z-index: 1000;
  backdrop-filter: blur(40px) saturate(200%);
}

@keyframes drag-float {
  0%, 100% { 
    transform: rotate(5deg) scale(1.08) translateY(0px); 
    box-shadow: var(--shadow-extreme), var(--shadow-neon-blue);
  }
  50% { 
    transform: rotate(-3deg) scale(1.08) translateY(-8px); 
    box-shadow: var(--shadow-extreme), 0 0 60px rgba(0, 212, 255, 0.6);
  }
}

/* Enhanced Drag Over States */
.drag-over {
  background: linear-gradient(135deg, rgba(79, 172, 254, 0.15), rgba(0, 242, 254, 0.10)) !important;
  border: 3px dashed var(--neon-cyan);
  transform: scale(1.03);
  box-shadow: inset 0 0 50px rgba(79, 172, 254, 0.2), var(--shadow-strong);
  animation: drag-over-pulse 1s ease-in-out infinite;
}

@keyframes drag-over-pulse {
  0%, 100% { 
    border-color: var(--neon-cyan);
    box-shadow: inset 0 0 50px rgba(79, 172, 254, 0.2), var(--shadow-strong);
  }
  50% { 
    border-color: var(--neon-blue);
    box-shadow: inset 0 0 80px rgba(0, 212, 255, 0.3), var(--shadow-extreme);
  }
}

/* Premium Scrollbar Design */
.toolbox::-webkit-scrollbar,
.form-builder::-webkit-scrollbar {
  width: 12px;
}

.toolbox::-webkit-scrollbar-track,
.form-builder::-webkit-scrollbar-track {
  background: rgba(255, 255, 255, 0.03);
  border-radius: var(--radius-full);
  margin: var(--space-2);
}

.toolbox::-webkit-scrollbar-thumb,
.form-builder::-webkit-scrollbar-thumb {
  background: var(--accent-gradient);
  border-radius: var(--radius-full);
  border: 2px solid transparent;
  background-clip: padding-box;
  transition: var(--transition-base);
  box-shadow: inset 0 0 10px rgba(0, 0, 0, 0.2);
}

.toolbox::-webkit-scrollbar-thumb:hover,
.form-builder::-webkit-scrollbar-thumb:hover {
  background: var(--secondary-gradient);
  box-shadow: 
    inset 0 0 10px rgba(0, 0, 0, 0.3),
    0 0 20px rgba(240, 147, 251, 0.4);
}

/* Loading and State Animations */
@keyframes pulse-loading {
  0%, 100% { 
    opacity: 1; 
    transform: scale(1);
  }
  50% { 
    opacity: 0.7; 
    transform: scale(0.98);
  }
}

.loading {
  animation: pulse-loading 2s ease-in-out infinite;
  pointer-events: none;
  filter: grayscale(30%);
}

/* Success State Animation */
@keyframes success-celebration {
  0% { 
    transform: scale(1);
    box-shadow: var(--shadow-medium);
  }
  25% { 
    transform: scale(1.05);
    box-shadow: var(--shadow-neon-green);
  }
  50% { 
    transform: scale(1.02);
    box-shadow: 0 0 60px rgba(16, 185, 129, 0.6);
  }
  75% { 
    transform: scale(1.03);
    box-shadow: var(--shadow-neon-green);
  }
  100% { 
    transform: scale(1);
    box-shadow: var(--shadow-strong);
  }
}

.success {
  border-color: var(--neon-green) !important;
  background: linear-gradient(135deg, rgba(16, 185, 129, 0.15), rgba(32, 191, 107, 0.10)) !important;
  animation: success-celebration 1.5s ease-out;
}

/* Micro-Interactions */
@keyframes micro-bounce {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-2px); }
}

.draggable:hover,
.form-element:hover,
button:hover {
  animation: micro-bounce 0.6s ease-in-out;
}

/* Advanced Responsive Design */
@media (max-width: 1400px) {
  .builder-container {
    gap: var(--space-6);
  }
  
  .toolbox {
    flex: 0 0 360px;
  }
}

@media (max-width: 1200px) {
  .builder-container {
    gap: var(--space-5);
    padding: var(--space-6);
  }
  
  .toolbox {
    flex: 0 0 340px;
  }
  
  .toolbox,
  .form-builder {
    padding: var(--space-8);
  }
}

@media (max-width: 968px) {
  .builder-container {
    flex-direction: column;
    padding: var(--space-5);
    gap: var(--space-6);
  }
  
  .toolbox {
    flex: none;
    order: 1;
    animation: fade-in-up 0.8s ease-out;
  }
  
  .form-builder {
    order: 2;
    min-height: 70vh;
    animation: fade-in-up 0.8s ease-out 0.2s both;
  }
  
  .toolbox h3,
  .form-builder h3 {
    font-size: clamp(28px, 8vw, 36px);
  }
}

@media (max-width: 640px) {
  .builder-container {
    padding: var(--space-4);
    gap: var(--space-4);
  }
  
  .toolbox,
  .form-builder {
    padding: var(--space-6);
    border-radius: var(--radius-lg);
  }
  
  .form-element {
    padding: var(--space-6);
    margin: var(--space-5) 0;
  }
  
  .draggable {
    padding: var(--space-4) var(--space-6);
    font-size: 14px;
  }
  
  .draggable-icon {
    font-size: 18px;
  }
  
  .submit-button {
    min-width: 200px;
    font-size: 16px;
    padding: var(--space-5) var(--space-10);
  }
}

@media (max-width: 480px) {
  .toolbox h3,
  .form-builder h3 {
    font-size: clamp(24px, 6vw, 32px);
    margin-bottom: var(--space-8);
  }
  
  .bigHeadDiv input {
    font-size: clamp(24px, 8vw, 36px);
  }
  
  .smallHeadDiv input {
    font-size: clamp(18px, 6vw, 24px);
  }
  
  .form-element input,
  .form-element textarea,
  .form-element select {
    font-size: 15px;
    padding: var(--space-5);
  }
}

/* Accessibility Enhancements */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
  
  .toolbox:hover,
  .form-builder:hover,
  .draggable:hover,
  .form-element:hover {
    transform: none;
  }
}

/* Enhanced Focus Styles */
*:focus-visible {
  outline: 3px solid var(--neon-blue);
  outline-offset: 3px;
  border-radius: var(--radius-sm);
  box-shadow: 0 0 0 6px rgba(0, 212, 255, 0.2);
}

/* High Contrast Mode Support */
@media (prefers-contrast: high) {
  :root {
    --glass: rgba(255, 255, 255, 0.20);
    --glass-strong: rgba(255, 255, 255, 0.25);
    --glass-border: rgba(255, 255, 255, 0.40);
    --text-secondary: #f0f0f0;
    --text-muted: #d0d0d0;
  }
  
  .draggable,
  .form-element {
    border-width: 2px;
  }
  
  button {
    border: 2px solid rgba(255, 255, 255, 0.5);
  }
}

/* Dark Mode Refinements */
@media (prefers-color-scheme: dark) {
  :root {
    --glass: rgba(255, 255, 255, 0.03);
    --glass-strong: rgba(255, 255, 255, 0.06);
    --surface: rgba(20, 20, 35, 0.9);
    --surface-light: rgba(25, 35, 65, 0.9);
  }
}

/* Print Optimization */
@media print {
  body::before,
  body::after,
  .toolbox::before,
  .toolbox::after,
  .form-builder::before {
    display: none;
  }
  
  .toolbox {
    display: none;
  }
  
  .builder-container {
    display: block;
    padding: 0;
  }
  
  .form-builder {
    box-shadow: none;
    border: 2px solid #333;
    background: white;
    color: #333;
  }
  
  .form-element {
    background: #f9f9f9;
    border: 1px solid #ddd;
  }
  
  .form-element input,
  .form-element textarea {
    background: white;
    border: 1px solid #999;
    color: #333;
  }
}

/* Landing Page Elements */
.hero-section {
  position: relative;
  padding: var(--space-20) 0;
  text-align: center;
  background: linear-gradient(135deg, rgba(103, 126, 234, 0.1), rgba(240, 147, 251, 0.05));
  border-radius: var(--radius-2xl);
  margin-bottom: var(--space-16);
  backdrop-filter: blur(60px);
  border: 1px solid var(--glass-border);
  animation: fade-in-up 1s ease-out;
}

.hero-title {
  font-family: var(--font-display);
  font-size: clamp(48px, 8vw, 72px);
  font-weight: 900;
  background: var(--cosmic-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: var(--space-6);
  letter-spacing: -0.02em;
  animation: text-glow 4s ease-in-out infinite;
}

.hero-subtitle {
  font-size: clamp(18px, 3vw, 24px);
  color: var(--text-secondary);
  margin-bottom: var(--space-8);
  font-weight: 400;
  line-height: 1.6;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--space-8);
  margin: var(--space-16) 0;
}

.feature-card {
  background: var(--glass-strong);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-xl);
  padding: var(--space-8);
  backdrop-filter: blur(32px);
  transition: var(--transition-base);
  animation: scale-in 0.8s ease-out;
}

.feature-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-extreme), var(--shadow-neon-blue);
  border-color: var(--neon-blue);
}

.feature-icon {
  font-size: 48px;
  margin-bottom: var(--space-4);
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.feature-title {
  font-size: 24px;
  font-weight: 700;
  margin-bottom: var(--space-3);
  color: var(--text-primary);
}

.feature-description {
  color: var(--text-secondary);
  line-height: 1.6;
}

/* Floating Action Elements */
.floating-particles {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 0;
}

.particle {
  position: absolute;
  width: 4px;
  height: 4px;
  background: var(--neon-blue);
  border-radius: 50%;
  animation: float-particle 20s linear infinite;
  opacity: 0.6;
}

.particle:nth-child(odd) {
  background: var(--neon-pink);
  animation-duration: 25s;
}

.particle:nth-child(3n) {
  background: var(--neon-purple);
  animation-duration: 30s;
}

@keyframes float-particle {
  0% {
    transform: translateY(100vh) translateX(0) rotate(0deg);
    opacity: 0;
  }
  10% {
    opacity: 0.6;
  }
  90% {
    opacity: 0.6;
  }
  100% {
    transform: translateY(-100px) translateX(200px) rotate(360deg);
    opacity: 0;
  }
}

/* Advanced Tooltip System */
.tooltip {
  position: relative;
}

.tooltip::after {
  content: attr(data-tooltip);
  position: absolute;
  bottom: 100%;
  left: 50%;
  transform: translateX(-50%);
  background: rgba(0, 0, 0, 0.9);
  color: white;
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-sm);
  font-size: 12px;
  white-space: nowrap;
  opacity: 0;
  pointer-events: none;
  transition: var(--transition-base);
  z-index: 1000;
  backdrop-filter: blur(16px);
  border: 1px solid var(--glass-border);
}

.tooltip:hover::after {
  opacity: 1;
  transform: translateX(-50%) translateY(-4px);
}

/* Performance Optimizations */
.gpu-accelerated {
  transform: translateZ(0);
  will-change: transform, opacity;
}

/* Custom Properties for Dynamic Theming */
[data-theme="neon"] {
  --primary-gradient: linear-gradient(135deg, #00f2fe 0%, #4facfe 50%, #667eea 100%);
  --glass: rgba(0, 242, 254, 0.05);
  --glass-border: rgba(0, 242, 254, 0.15);
}

[data-theme="sunset"] {
  --primary-gradient: linear-gradient(135deg, #f093fb 0%, #f5576c 50%, #f7971e 100%);
  --glass: rgba(240, 147, 251, 0.05);
  --glass-border: rgba(240, 147, 251, 0.15);
}

[data-theme="forest"] {
  --primary-gradient: linear-gradient(135deg, #11998e 0%, #38ef7d 50%, #20bf6b 100%);
  --glass: rgba(17, 153, 142, 0.05);
  --glass-border: rgba(17, 153, 142, 0.15);
}

body.dark-mode {
  --background: #1e1e2f;
  --foreground: #2c2c3e;
  --text: #f4f4f4;
  --accent: #6366f1;
  --draggable-bg: #373756;
  --draggable-hover: #4b4b7c;
  --border-color: #444455;
}

.theme-toggle {
  position: absolute;
  top: 1rem;
  right: 1.5rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  z-index: 1000;
}

.switch {
  position: relative;
  display: inline-block;
  width: 44px;
  height: 24px;
}

.switch input {
  opacity: 0;
  width: 0;
  height: 0;
}

.slider {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: #ccc;
  border-radius: 24px;
  transition: 0.4s;
}
.slider:before {
  position: absolute;
  content: "";
  height: 18px;
  width: 18px;
  left: 3px;
  bottom: 3px;
  background-color: white;
  border-radius: 50%;
  transition: 0.4s;
}
input:checked + .slider {
  background-color: var(--accent);
}
input:checked + .slider:before {
  transform: translateX(20px);
}

/* Light Theme Overrides */
body.light-mode {
  --dark-bg: radial-gradient(ellipse at top, #ffffff 0%, #f7f9fc 70%);
  --surface: rgba(255, 255, 255, 0.85);
  --surface-light: rgba(245, 248, 252, 0.95);
  --surface-lighter: rgba(230, 240, 255, 0.9);
  --glass: rgba(0, 0, 0, 0.02);
  --glass-strong: rgba(0, 0, 0, 0.08);
  --glass-border: rgba(0, 0, 0, 0.1);
  --glass-hover: rgba(0, 0, 0, 0.12);

  --text-primary: #1e293b;
  --text-secondary: #334155;
  --text-muted: #64748b;
  --text-accent: #475569;

  --shadow-soft: 0 2px 8px rgba(0, 0, 0, 0.04);
  --shadow-medium: 0 8px 32px rgba(0, 0, 0, 0.06);
  --shadow-strong: 0 16px 64px rgba(0, 0, 0, 0.08);
  --shadow-extreme: 0 32px 128px rgba(0, 0, 0, 0.1);

  background: var(--dark-bg);
  color: var(--text-primary);
}

body.light-mode::before {
  background:
    radial-gradient(circle at 20% 50%, rgba(103, 126, 234, 0.1) 0%, transparent 50%),
    radial-gradient(circle at 80% 20%, rgba(240, 147, 251, 0.08) 0%, transparent 50%),
    radial-gradient(circle at 40% 80%, rgba(79, 172, 254, 0.08) 0%, transparent 50%),
    radial-gradient(circle at 60% 40%, rgba(16, 185, 129, 0.06) 0%, transparent 50%);
}

body.light-mode::after {
  background-image: 
    linear-gradient(rgba(0, 0, 0, 0.015) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0, 0, 0, 0.015) 1px, transparent 1px);
}