/* Nova Theme - Ultra Premium & Comprehensive Design System for Artstelve */
/* Advanced Modern Design with Glass Morphism, Neumorphism, and Futuristic Elements */

/* CSS Variables for Complete Design System */
:root {
  /* Primary Color Palette */
  --nova-primary: #6366f1;
  --nova-primary-dark: #4f46e5;
  --nova-primary-darker: #3730a3;
  --nova-primary-light: #818cf8;
  --nova-primary-lighter: #a5b4fc;
  --nova-primary-rgb: 99, 102, 241;
  --nova-primary-hsl: 239, 84%, 67%;
  
  /* Secondary Color Palette */
  --nova-secondary: #8b5cf6;
  --nova-secondary-dark: #7c3aed;
  --nova-secondary-darker: #6d28d9;
  --nova-secondary-light: #a78bfa;
  --nova-secondary-lighter: #c4b5fd;
  --nova-secondary-rgb: 139, 92, 246;
  --nova-secondary-hsl: 258, 79%, 67%;
  
  /* Accent Color Palette */
  --nova-accent: #ec4899;
  --nova-accent-dark: #db2777;
  --nova-accent-darker: #be185d;
  --nova-accent-light: #f472b6;
  --nova-accent-lighter: #f9a8d4;
  --nova-accent-rgb: 236, 72, 153;
  --nova-accent-hsl: 330, 78%, 60%;
  
  /* Success Color Palette */
  --nova-success: #10b981;
  --nova-success-dark: #059669;
  --nova-success-light: #34d399;
  --nova-success-rgb: 16, 185, 129;
  
  /* Warning Color Palette */
  --nova-warning: #f59e0b;
  --nova-warning-dark: #d97706;
  --nova-warning-light: #fbbf24;
  --nova-warning-rgb: 245, 158, 11;
  
  /* Error Color Palette */
  --nova-error: #ef4444;
  --nova-error-dark: #dc2626;
  --nova-error-light: #f87171;
  --nova-error-rgb: 239, 68, 68;
  
  /* Neutral Color Palette */
  --nova-background: #0f172a;
  --nova-background-dark: #020617;
  --nova-surface: #1e293b;
  --nova-surface-dark: #1e293b;
  --nova-surface-light: #334155;
  --nova-surface-lighter: #475569;
  --nova-surface-bright: #64748b;
  --nova-border: #475569;
  --nova-border-light: #64748b;
  --nova-border-bright: #94a3b8;
  --nova-text: #f1f5f9;
  --nova-text-secondary: #cbd5e1;
  --nova-text-muted: #94a3b8;
  --nova-text-faded: #64748b;
  
  /* Advanced Gradients */
  --nova-gradient-primary: linear-gradient(135deg, var(--nova-primary) 0%, var(--nova-secondary) 50%, var(--nova-accent) 100%);
  --nova-gradient-primary-reverse: linear-gradient(225deg, var(--nova-accent) 0%, var(--nova-secondary) 50%, var(--nova-primary) 100%);
  --nova-gradient-accent: linear-gradient(135deg, var(--nova-accent) 0%, var(--nova-secondary) 100%);
  --nova-gradient-surface: linear-gradient(135deg, var(--nova-surface) 0%, var(--nova-surface-light) 100%);
  --nova-gradient-radial: radial-gradient(circle at 50% 50%, var(--nova-primary) 0%, var(--nova-secondary) 30%, var(--nova-accent) 60%, transparent 100%);
  --nova-gradient-conic: conic-gradient(from 0deg, var(--nova-primary), var(--nova-secondary), var(--nova-accent), var(--nova-primary));
  --nova-gradient-mesh: radial-gradient(at 40% 20%, var(--nova-primary) 0px, transparent 50%), 
                         radial-gradient(at 80% 0%, var(--nova-secondary) 0px, transparent 50%), 
                         radial-gradient(at 0% 50%, var(--nova-accent) 0px, transparent 50%);
  --nova-gradient-aurora: linear-gradient(135deg, 
    rgba(99, 102, 241, 0.8) 0%, 
    rgba(139, 92, 246, 0.6) 25%, 
    rgba(236, 72, 153, 0.8) 50%, 
    rgba(99, 102, 241, 0.6) 75%, 
    rgba(139, 92, 246, 0.8) 100%);
  
  /* Advanced Shadow System */
  --nova-shadow-xs: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --nova-shadow-sm: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px 0 rgba(0, 0, 0, 0.06);
  --nova-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --nova-shadow-md: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
  --nova-shadow-lg: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
  --nova-shadow-xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
  --nova-shadow-2xl: 0 50px 100px -20px rgba(0, 0, 0, 0.5);
  --nova-shadow-glow: 0 0 20px rgba(var(--nova-primary-rgb), 0.3);
  --nova-shadow-glow-accent: 0 0 30px rgba(var(--nova-accent-rgb), 0.4);
  --nova-shadow-glow-success: 0 0 25px rgba(var(--nova-success-rgb), 0.4);
  --nova-shadow-glow-warning: 0 0 25px rgba(var(--nova-warning-rgb), 0.4);
  --nova-shadow-glow-error: 0 0 25px rgba(var(--nova-error-rgb), 0.4);
  --nova-shadow-inner: inset 0 2px 4px 0 rgba(0, 0, 0, 0.06);
  --nova-shadow-colored-primary: 0 10px 15px -3px rgba(var(--nova-primary-rgb), 0.3);
  --nova-shadow-colored-secondary: 0 10px 15px -3px rgba(var(--nova-secondary-rgb), 0.3);
  --nova-shadow-colored-accent: 0 10px 15px -3px rgba(var(--nova-accent-rgb), 0.3);
  
  /* Advanced Transitions */
  --nova-transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --nova-transition: 300ms cubic-bezier(0.4, 0, 0.2, 1);
  --nova-transition-slow: 500ms cubic-bezier(0.4, 0, 0.2, 1);
  --nova-transition-bounce: 600ms cubic-bezier(0.68, -0.55, 0.265, 1.55);
  --nova-transition-smooth: 400ms cubic-bezier(0.25, 0.46, 0.45, 0.94);
  --nova-transition-elastic: 800ms cubic-bezier(0.175, 0.885, 0.32, 1.275);
  
  /* Border Radius System */
  --nova-radius-xs: 0.125rem;
  --nova-radius-sm: 0.25rem;
  --nova-radius: 0.5rem;
  --nova-radius-md: 0.75rem;
  --nova-radius-lg: 1rem;
  --nova-radius-xl: 1.5rem;
  --nova-radius-2xl: 2rem;
  --nova-radius-3xl: 3rem;
  --nova-radius-full: 9999px;
  
  /* Spacing System */
  --nova-space-px: 1px;
  --nova-space-0: 0;
  --nova-space-1: 0.25rem;
  --nova-space-2: 0.5rem;
  --nova-space-3: 0.75rem;
  --nova-space-4: 1rem;
  --nova-space-5: 1.25rem;
  --nova-space-6: 1.5rem;
  --nova-space-8: 2rem;
  --nova-space-10: 2.5rem;
  --nova-space-12: 3rem;
  --nova-space-16: 4rem;
  --nova-space-20: 5rem;
  --nova-space-24: 6rem;
  --nova-space-32: 8rem;
  
  /* Typography Scale */
  --nova-text-xs: 0.75rem;
  --nova-text-sm: 0.875rem;
  --nova-text-base: 1rem;
  --nova-text-lg: 1.125rem;
  --nova-text-xl: 1.25rem;
  --nova-text-2xl: 1.5rem;
  --nova-text-3xl: 1.875rem;
  --nova-text-4xl: 2.25rem;
  --nova-text-5xl: 3rem;
  --nova-text-6xl: 3.75rem;
  --nova-text-7xl: 4.5rem;
  --nova-text-8xl: 6rem;
  --nova-text-9xl: 8rem;
  
  /* Font Weights */
  --nova-font-thin: 100;
  --nova-font-light: 300;
  --nova-font-normal: 400;
  --nova-font-medium: 500;
  --nova-font-semibold: 600;
  --nova-font-bold: 700;
  --nova-font-extrabold: 800;
  --nova-font-black: 900;
  
  /* Line Heights */
  --nova-leading-none: 1;
  --nova-leading-tight: 1.25;
  --nova-leading-snug: 1.375;
  --nova-leading-normal: 1.5;
  --nova-leading-relaxed: 1.625;
  --nova-leading-loose: 2;
  
  /* Z-Index Scale */
  --nova-z-0: 0;
  --nova-z-10: 10;
  --nova-z-20: 20;
  --nova-z-30: 30;
  --nova-z-40: 40;
  --nova-z-50: 50;
  --nova-z-auto: auto;
  --nova-z-dropdown: 1000;
  --nova-z-sticky: 1020;
  --nova-z-fixed: 1030;
  --nova-z-modal-backdrop: 1040;
  --nova-z-modal: 1050;
  --nova-z-popover: 1060;
  --nova-z-tooltip: 1070;
  --nova-z-toast: 1080;
}

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

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

body {
  background: var(--nova-background);
  background-image: 
    radial-gradient(at 40% 20%, rgba(99, 102, 241, 0.1) 0px, transparent 50%),
    radial-gradient(at 80% 0%, rgba(139, 92, 246, 0.1) 0px, transparent 50%),
    radial-gradient(at 0% 50%, rgba(236, 72, 153, 0.1) 0px, transparent 50%);
  color: var(--nova-text);
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, 'Noto Sans', sans-serif, 'Apple Color Emoji', 'Segoe UI Emoji', 'Segoe UI Symbol', 'Noto Color Emoji';
  font-size: var(--nova-text-base);
  line-height: var(--nova-leading-normal);
  font-weight: var(--nova-font-normal);
  transition: all var(--nova-transition);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

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

::-webkit-scrollbar-track {
  background: var(--nova-surface-dark);
  border-radius: var(--nova-radius-full);
  border: 1px solid var(--nova-border);
}

::-webkit-scrollbar-thumb {
  background: var(--nova-gradient-primary);
  border-radius: var(--nova-radius-full);
  border: 2px solid var(--nova-surface-dark);
  transition: all var(--nova-transition);
  cursor: pointer;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--nova-gradient-accent);
  transform: scale(1.1);
}

::-webkit-scrollbar-thumb:active {
  background: var(--nova-primary);
  transform: scale(0.95);
}

::-webkit-scrollbar-corner {
  background: var(--nova-surface-dark);
}

/* Firefox Scrollbar */
* {
  scrollbar-width: thin;
  scrollbar-color: var(--nova-primary) var(--nova-surface-dark);
}

/* Advanced Typography System */
h1, h2, h3, h4, h5, h6 {
  color: var(--nova-text);
  font-weight: var(--nova-font-semibold);
  line-height: var(--nova-leading-tight);
  margin-bottom: var(--nova-space-4);
  letter-spacing: -0.025em;
  transition: all var(--nova-transition);
}

h1 {
  font-size: var(--nova-text-5xl);
  font-weight: var(--nova-font-bold);
  background: var(--nova-gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  text-shadow: 0 0 30px rgba(var(--nova-primary-rgb), 0.3);
  margin-bottom: var(--nova-space-6);
}

h2 {
  font-size: var(--nova-text-4xl);
  font-weight: var(--nova-font-semibold);
  color: var(--nova-primary-light);
  margin-bottom: var(--nova-space-5);
}

h3 {
  font-size: var(--nova-text-3xl);
  font-weight: var(--nova-font-semibold);
  color: var(--nova-secondary-light);
  margin-bottom: var(--nova-space-4);
}

h4 {
  font-size: var(--nova-text-2xl);
  font-weight: var(--nova-font-medium);
  color: var(--nova-text);
}

h5 {
  font-size: var(--nova-text-xl);
  font-weight: var(--nova-font-medium);
  color: var(--nova-text);
}

h6 {
  font-size: var(--nova-text-lg);
  font-weight: var(--nova-font-medium);
  color: var(--nova-text-secondary);
}

p {
  color: var(--nova-text-secondary);
  margin-bottom: var(--nova-space-4);
  line-height: var(--nova-leading-relaxed);
  font-size: var(--nova-text-base);
}

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

.nova-text-gradient-accent {
  background: var(--nova-gradient-accent);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.nova-text-glow {
  text-shadow: 0 0 20px rgba(var(--nova-primary-rgb), 0.5);
}

.nova-text-shadow {
  text-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

/* Advanced Link System */
a {
  color: var(--nova-primary);
  text-decoration: none;
  transition: all var(--nova-transition);
  position: relative;
  display: inline-block;
  font-weight: var(--nova-font-medium);
}

a:hover {
  color: var(--nova-primary-light);
  transform: translateY(-1px);
}

a:active {
  transform: translateY(0);
}

a::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--nova-gradient-primary);
  transition: width var(--nova-transition);
  border-radius: var(--nova-radius-full);
}

a:hover::after {
  width: 100%;
}

.nova-link-external {
  padding-right: var(--nova-space-4);
}

.nova-link-external::before {
  content: '↗';
  position: absolute;
  right: 0;
  top: 50%;
  transform: translateY(-50%);
  font-size: var(--nova-text-sm);
  opacity: 0.7;
  transition: all var(--nova-transition);
}

.nova-link-external:hover::before {
  opacity: 1;
  transform: translateY(-50%) translateX(2px);
}

/* Advanced Button System */
.nova-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--nova-space-2);
  padding: var(--nova-space-3) var(--nova-space-6);
  border: none;
  border-radius: var(--nova-radius-lg);
  font-weight: var(--nova-font-medium);
  font-size: var(--nova-text-sm);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  cursor: pointer;
  transition: all var(--nova-transition);
  position: relative;
  overflow: hidden;
  user-select: none;
  white-space: nowrap;
  box-shadow: var(--nova-shadow);
}

.nova-btn::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
  transition: left var(--nova-transition-slow);
}

.nova-btn:hover::before {
  left: 100%;
}

.nova-btn:active {
  transform: scale(0.98);
}

.nova-btn:focus {
  outline: none;
  box-shadow: 0 0 0 3px rgba(var(--nova-primary-rgb), 0.3), var(--nova-shadow);
}

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

.nova-btn-primary:hover {
  box-shadow: var(--nova-shadow-lg), var(--nova-shadow-glow);
  transform: translateY(-2px);
}

.nova-btn-secondary {
  background: var(--nova-gradient-accent);
  color: white;
  box-shadow: var(--nova-shadow-colored-accent);
}

.nova-btn-secondary:hover {
  box-shadow: var(--nova-shadow-lg), var(--nova-shadow-glow-accent);
  transform: translateY(-2px);
}

.nova-btn-success {
  background: linear-gradient(135deg, var(--nova-success) 0%, var(--nova-success-dark) 100%);
  color: white;
  box-shadow: var(--nova-shadow-colored-success);
}

.nova-btn-success:hover {
  box-shadow: var(--nova-shadow-lg), var(--nova-shadow-glow-success);
  transform: translateY(-2px);
}

.nova-btn-warning {
  background: linear-gradient(135deg, var(--nova-warning) 0%, var(--nova-warning-dark) 100%);
  color: white;
  box-shadow: var(--nova-shadow-colored-warning);
}

.nova-btn-warning:hover {
  box-shadow: var(--nova-shadow-lg), var(--nova-shadow-glow-warning);
  transform: translateY(-2px);
}

.nova-btn-error {
  background: linear-gradient(135deg, var(--nova-error) 0%, var(--nova-error-dark) 100%);
  color: white;
  box-shadow: var(--nova-shadow-colored-error);
}

.nova-btn-error:hover {
  box-shadow: var(--nova-shadow-lg), var(--nova-shadow-glow-error);
  transform: translateY(-2px);
}

.nova-btn-outline {
  background: transparent;
  color: var(--nova-primary);
  border: 2px solid var(--nova-primary);
  box-shadow: none;
}

.nova-btn-outline:hover {
  background: var(--nova-primary);
  color: white;
  box-shadow: var(--nova-shadow-glow);
  transform: translateY(-2px);
}

.nova-btn-ghost {
  background: transparent;
  color: var(--nova-primary);
  border: none;
  box-shadow: none;
}

.nova-btn-ghost:hover {
  background: rgba(var(--nova-primary-rgb), 0.1);
  color: var(--nova-primary-light);
  transform: translateY(-1px);
}

.nova-btn-3d {
  background: var(--nova-gradient-primary);
  color: white;
  box-shadow: 
    0 4px 0 var(--nova-primary-dark),
    0 8px 10px rgba(0, 0, 0, 0.2);
}

.nova-btn-3d:hover {
  transform: translateY(-2px);
  box-shadow: 
    0 6px 0 var(--nova-primary-dark),
    0 12px 15px rgba(0, 0, 0, 0.3);
}

.nova-btn-3d:active {
  transform: translateY(2px);
  box-shadow: 
    0 2px 0 var(--nova-primary-dark),
    0 4px 5px rgba(0, 0, 0, 0.2);
}

.nova-btn-neumorphic {
  background: var(--nova-surface);
  color: var(--nova-text);
  border: none;
  box-shadow: 
    8px 8px 16px rgba(0, 0, 0, 0.3),
    -8px -8px 16px rgba(255, 255, 255, 0.05);
}

.nova-btn-neumorphic:hover {
  box-shadow: 
    inset 4px 4px 8px rgba(0, 0, 0, 0.3),
    inset -4px -4px 8px rgba(255, 255, 255, 0.05);
  transform: none;
}

.nova-btn-glass {
  background: rgba(255, 255, 255, 0.1);
  color: white;
  border: 1px solid rgba(255, 255, 255, 0.2);
  backdrop-filter: blur(10px);
  box-shadow: var(--nova-shadow);
}

.nova-btn-glass:hover {
  background: rgba(255, 255, 255, 0.2);
  border-color: rgba(255, 255, 255, 0.3);
  box-shadow: var(--nova-shadow-lg);
  transform: translateY(-2px);
}

.nova-btn-gradient-text {
  background: transparent;
  color: var(--nova-primary);
  border: none;
  position: relative;
}

.nova-btn-gradient-text::before {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--nova-gradient-primary);
  border-radius: inherit;
  z-index: -1;
  opacity: 0;
  transition: opacity var(--nova-transition);
}

.nova-btn-gradient-text:hover::before {
  opacity: 0.1;
}

.nova-btn-gradient-text:hover {
  background: var(--nova-gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  transform: translateY(-2px);
}

/* Button Sizes */
.nova-btn-xs {
  padding: var(--nova-space-1) var(--nova-space-3);
  font-size: var(--nova-text-xs);
}

.nova-btn-sm {
  padding: var(--nova-space-2) var(--nova-space-4);
  font-size: var(--nova-text-sm);
}

.nova-btn-lg {
  padding: var(--nova-space-4) var(--nova-space-8);
  font-size: var(--nova-text-lg);
}

.nova-btn-xl {
  padding: var(--nova-space-6) var(--nova-space-12);
  font-size: var(--nova-text-xl);
}

.nova-btn-2xl {
  padding: var(--nova-space-8) var(--nova-space-16);
  font-size: var(--nova-text-2xl);
}

/* Button States */
.nova-btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none;
}

.nova-btn:disabled:hover {
  transform: none;
  box-shadow: var(--nova-shadow);
}

.nova-btn-loading {
  pointer-events: none;
  opacity: 0.8;
}

.nova-btn-loading::after {
  content: '';
  position: absolute;
  width: 16px;
  height: 16px;
  border: 2px solid transparent;
  border-top: 2px solid currentColor;
  border-radius: var(--nova-radius-full);
  animation: nova-spin 1s linear infinite;
  margin-left: var(--nova-space-2);
}

/* Advanced Card System */
.nova-card {
  background: var(--nova-surface);
  border: 1px solid var(--nova-border);
  border-radius: var(--nova-radius-xl);
  padding: var(--nova-space-6);
  box-shadow: var(--nova-shadow);
  transition: all var(--nova-transition);
  position: relative;
  overflow: hidden;
}

.nova-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: var(--nova-gradient-primary);
  opacity: 0;
  transition: opacity var(--nova-transition);
}

.nova-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--nova-shadow-xl);
  border-color: var(--nova-primary);
}

.nova-card:hover::before {
  opacity: 1;
}

.nova-card-glass {
  background: rgba(30, 41, 59, 0.8);
  backdrop-filter: blur(20px);
  border: 1px solid rgba(255, 255, 255, 0.1);
  box-shadow: var(--nova-shadow-lg);
}

.nova-card-glass:hover {
  background: rgba(30, 41, 59, 0.9);
  border-color: rgba(255, 255, 255, 0.2);
  box-shadow: var(--nova-shadow-xl), var(--nova-shadow-glow);
}

.nova-card-neumorphic {
  background: var(--nova-surface);
  border: none;
  box-shadow: 
    12px 12px 24px rgba(0, 0, 0, 0.4),
    -12px -12px 24px rgba(255, 255, 255, 0.05);
}

.nova-card-neumorphic:hover {
  box-shadow: 
    inset 6px 6px 12px rgba(0, 0, 0, 0.4),
    inset -6px -6px 12px rgba(255, 255, 255, 0.05);
  transform: none;
}

.nova-card-gradient {
  background: var(--nova-gradient-surface);
  border: 1px solid var(--nova-border-light);
  position: relative;
}

.nova-card-gradient::after {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--nova-gradient-aurora);
  opacity: 0.1;
  border-radius: inherit;
  transition: opacity var(--nova-transition);
}

.nova-card-gradient:hover::after {
  opacity: 0.2;
}

.nova-card-interactive {
  cursor: pointer;
  user-select: none;
}

.nova-card-interactive:active {
  transform: translateY(-2px) scale(0.98);
}

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

.nova-card-elevated:hover {
  box-shadow: var(--nova-shadow-2xl);
  transform: translateY(-6px);
}

.nova-card-bordered {
  border: 2px solid var(--nova-border);
  background: transparent;
}

.nova-card-bordered:hover {
  border-color: var(--nova-primary);
  background: var(--nova-surface);
}

.nova-card-3d {
  background: var(--nova-surface);
  border: none;
  box-shadow: 
    0 10px 0 var(--nova-surface-light),
    0 20px 20px rgba(0, 0, 0, 0.3);
  transform-style: preserve-3d;
}

.nova-card-3d:hover {
  transform: translateY(-5px) rotateX(5deg);
  box-shadow: 
    0 15px 0 var(--nova-surface-light),
    0 30px 30px rgba(0, 0, 0, 0.4);
}

.nova-card-minimal {
  background: transparent;
  border: 1px solid var(--nova-border);
  box-shadow: none;
}

.nova-card-minimal:hover {
  background: var(--nova-surface);
  box-shadow: var(--nova-shadow);
}

/* Card Sizes */
.nova-card-sm {
  padding: var(--nova-space-4);
  border-radius: var(--nova-radius-lg);
}

.nova-card-lg {
  padding: var(--nova-space-8);
  border-radius: var(--nova-radius-2xl);
}

.nova-card-xl {
  padding: var(--nova-space-12);
  border-radius: var(--nova-radius-3xl);
}

/* Card Variants */
.nova-card-primary {
  background: linear-gradient(135deg, var(--nova-primary) 0%, var(--nova-secondary) 100%);
  color: white;
  border: none;
}

.nova-card-primary:hover {
  box-shadow: var(--nova-shadow-glow), var(--nova-shadow-xl);
}

.nova-card-success {
  background: linear-gradient(135deg, var(--nova-success) 0%, var(--nova-success-dark) 100%);
  color: white;
  border: none;
}

.nova-card-warning {
  background: linear-gradient(135deg, var(--nova-warning) 0%, var(--nova-warning-dark) 100%);
  color: white;
  border: none;
}

.nova-card-error {
  background: linear-gradient(135deg, var(--nova-error) 0%, var(--nova-error-dark) 100%);
  color: white;
  border: none;
}

/* Advanced Form Elements System */
.nova-input,
.nova-select,
.nova-textarea {
  width: 100%;
  padding: var(--nova-space-3) var(--nova-space-4);
  background: var(--nova-surface);
  border: 2px solid var(--nova-border);
  border-radius: var(--nova-radius-lg);
  color: var(--nova-text);
  font-size: var(--nova-text-base);
  font-family: inherit;
  transition: all var(--nova-transition);
  outline: none;
}

.nova-input:focus,
.nova-select:focus,
.nova-textarea:focus {
  border-color: var(--nova-primary);
  box-shadow: 0 0 0 3px rgba(var(--nova-primary-rgb), 0.1), var(--nova-shadow-glow);
  background: var(--nova-surface-light);
}

.nova-input::placeholder,
.nova-textarea::placeholder {
  color: var(--nova-text-muted);
  opacity: 0.8;
}

.nova-input:hover,
.nova-select:hover,
.nova-textarea:hover {
  border-color: var(--nova-border-light);
}

.nova-input:disabled,
.nova-select:disabled,
.nova-textarea:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  background: var(--nova-surface-light);
}

.nova-input-error,
.nova-select-error,
.nova-textarea-error {
  border-color: var(--nova-error);
  box-shadow: 0 0 0 3px rgba(var(--nova-error-rgb), 0.1);
}

.nova-input-success,
.nova-select-success,
.nova-textarea-success {
  border-color: var(--nova-success);
  box-shadow: 0 0 0 3px rgba(var(--nova-success-rgb), 0.1);
}

.nova-input-warning,
.nova-select-warning,
.nova-textarea-warning {
  border-color: var(--nova-warning);
  box-shadow: 0 0 0 3px rgba(var(--nova-warning-rgb), 0.1);
}

/* Input Variants */
.nova-input-outline {
  background: transparent;
  border: 2px solid var(--nova-border);
}

.nova-input-outline:focus {
  background: var(--nova-surface);
}

.nova-input-filled {
  background: var(--nova-surface-light);
  border: 2px solid transparent;
}

.nova-input-filled:focus {
  background: var(--nova-surface);
  border-color: var(--nova-primary);
}

.nova-input-ghost {
  background: transparent;
  border: 2px solid transparent;
  border-bottom: 2px solid var(--nova-border);
  border-radius: 0;
  padding-left: 0;
  padding-right: 0;
}

.nova-input-ghost:focus {
  border-bottom-color: var(--nova-primary);
  background: transparent;
}

.nova-input-neumorphic {
  background: var(--nova-surface);
  border: none;
  box-shadow: 
    inset 4px 4px 8px rgba(0, 0, 0, 0.3),
    inset -4px -4px 8px rgba(255, 255, 255, 0.05);
}

.nova-input-neumorphic:focus {
  box-shadow: 
    inset 6px 6px 12px rgba(0, 0, 0, 0.3),
    inset -6px -6px 12px rgba(255, 255, 255, 0.05),
    0 0 0 3px rgba(var(--nova-primary-rgb), 0.1);
}

.nova-input-glass {
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.2);
  backdrop-filter: blur(10px);
  color: white;
}

.nova-input-glass::placeholder {
  color: rgba(255, 255, 255, 0.6);
}

.nova-input-glass:focus {
  background: rgba(255, 255, 255, 0.15);
  border-color: rgba(255, 255, 255, 0.4);
  box-shadow: 0 0 0 3px rgba(255, 255, 255, 0.2);
}

/* Input Sizes */
.nova-input-xs,
.nova-select-xs,
.nova-textarea-xs {
  padding: var(--nova-space-1) var(--nova-space-2);
  font-size: var(--nova-text-xs);
  border-radius: var(--nova-radius);
}

.nova-input-sm,
.nova-select-sm,
.nova-textarea-sm {
  padding: var(--nova-space-2) var(--nova-space-3);
  font-size: var(--nova-text-sm);
  border-radius: var(--nova-radius);
}

.nova-input-lg,
.nova-select-lg,
.nova-textarea-lg {
  padding: var(--nova-space-4) var(--nova-space-6);
  font-size: var(--nova-text-lg);
  border-radius: var(--nova-radius-xl);
}

.nova-input-xl,
.nova-select-xl,
.nova-textarea-xl {
  padding: var(--nova-space-6) var(--nova-space-8);
  font-size: var(--nova-text-xl);
  border-radius: var(--nova-radius-2xl);
}

/* Select Specific Styles */
.nova-select {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%2394a3b8' d='M6 9L1 4h10z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right var(--nova-space-3) center;
  padding-right: var(--nova-space-10);
}

.nova-select:focus {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%236366f1' d='M6 9L1 4h10z'/%3E%3C/svg%3E");
}

/* Textarea Specific Styles */
.nova-textarea {
  resize: vertical;
  min-height: 100px;
}

.nova-textarea-sm {
  min-height: 80px;
}

.nova-textarea-lg {
  min-height: 150px;
}

.nova-textarea-xl {
  min-height: 200px;
}

/* Input Groups */
.nova-input-group {
  display: flex;
  align-items: stretch;
}

.nova-input-group .nova-input {
  border-radius: 0;
  border-right: none;
}

.nova-input-group .nova-input:first-child {
  border-radius: var(--nova-radius-lg) 0 0 var(--nova-radius-lg);
}

.nova-input-group .nova-input:last-child {
  border-radius: 0 var(--nova-radius-lg) var(--nova-radius-lg) 0;
  border-right: 2px solid var(--nova-border);
}

.nova-input-group .nova-input:only-child {
  border-radius: var(--nova-radius-lg);
  border-right: 2px solid var(--nova-border);
}

.nova-input-group-addon {
  display: flex;
  align-items: center;
  padding: 0 var(--nova-space-4);
  background: var(--nova-surface-light);
  border: 2px solid var(--nova-border);
  color: var(--nova-text-muted);
  font-size: var(--nova-text-sm);
  font-weight: var(--nova-font-medium);
  white-space: nowrap;
}

.nova-input-group-addon:first-child {
  border-radius: var(--nova-radius-lg) 0 0 var(--nova-radius-lg);
  border-right: none;
}

.nova-input-group-addon:last-child {
  border-radius: 0 var(--nova-radius-lg) var(--nova-radius-lg) 0;
  border-left: none;
}

/* Floating Labels */
.nova-input-wrapper {
  position: relative;
}

.nova-input-float {
  padding-top: var(--nova-space-6);
  padding-bottom: var(--nova-space-2);
}

.nova-input-float:focus + .nova-input-label,
.nova-input-float:not(:placeholder-shown) + .nova-input-label {
  transform: translateY(-25px) scale(0.85);
  color: var(--nova-primary);
}

.nova-input-label {
  position: absolute;
  top: var(--nova-space-3);
  left: var(--nova-space-4);
  color: var(--nova-text-muted);
  font-size: var(--nova-text-base);
  transition: all var(--nova-transition);
  transform-origin: left;
  pointer-events: none;
  background: var(--nova-surface);
  padding: 0 var(--nova-space-1);
}

/* Checkboxes and Radio Buttons */
.nova-checkbox,
.nova-radio {
  appearance: none;
  width: 20px;
  height: 20px;
  border: 2px solid var(--nova-border);
  border-radius: var(--nova-radius);
  background: var(--nova-surface);
  cursor: pointer;
  position: relative;
  transition: all var(--nova-transition);
}

.nova-checkbox {
  border-radius: var(--nova-radius);
}

.nova-radio {
  border-radius: var(--nova-radius-full);
}

.nova-checkbox:checked,
.nova-radio:checked {
  background: var(--nova-gradient-primary);
  border-color: var(--nova-primary);
  box-shadow: var(--nova-shadow-glow);
}

.nova-checkbox:checked::after {
  content: '✓';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  color: white;
  font-size: 12px;
  font-weight: bold;
}

.nova-radio:checked::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 8px;
  height: 8px;
  background: white;
  border-radius: var(--nova-radius-full);
}

.nova-checkbox:hover,
.nova-radio:hover {
  border-color: var(--nova-primary);
  transform: scale(1.1);
}

.nova-checkbox:focus,
.nova-radio:focus {
  outline: none;
  box-shadow: 0 0 0 3px rgba(var(--nova-primary-rgb), 0.2);
}

/* Switch */
.nova-switch {
  position: relative;
  width: 48px;
  height: 24px;
  background: var(--nova-surface-light);
  border: 2px solid var(--nova-border);
  border-radius: var(--nova-radius-full);
  cursor: pointer;
  transition: all var(--nova-transition);
}

.nova-switch::after {
  content: '';
  position: absolute;
  top: 2px;
  left: 2px;
  width: 16px;
  height: 16px;
  background: var(--nova-text-muted);
  border-radius: var(--nova-radius-full);
  transition: all var(--nova-transition);
}

.nova-switch:checked {
  background: var(--nova-gradient-primary);
  border-color: var(--nova-primary);
  box-shadow: var(--nova-shadow-glow);
}

.nova-switch:checked::after {
  transform: translateX(24px);
  background: white;
}

.nova-switch:hover {
  transform: scale(1.05);
}

.nova-switch:focus {
  outline: none;
  box-shadow: 0 0 0 3px rgba(var(--nova-primary-rgb), 0.2);
}

/* Navigation */
.nova-nav {
  background: var(--nova-surface);
  border-bottom: 1px solid var(--nova-border);
  padding: var(--nova-space) 0;
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(10px);
}

.nova-nav-item {
  padding: var(--nova-space-sm) var(--nova-space);
  color: var(--nova-text-secondary);
  text-decoration: none;
  border-radius: var(--nova-radius);
  transition: all var(--nova-transition);
  position: relative;
}

.nova-nav-item:hover {
  color: var(--nova-primary);
  background: rgba(var(--nova-primary-rgb), 0.1);
}

.nova-nav-item.active {
  color: var(--nova-primary);
  background: rgba(var(--nova-primary-rgb), 0.15);
}

.nova-nav-item.active::after {
  content: '';
  position: absolute;
  bottom: -1px;
  left: 50%;
  transform: translateX(-50%);
  width: 30px;
  height: 3px;
  background: var(--nova-gradient-primary);
  border-radius: var(--nova-radius-full);
}

/* Search Bar */
.nova-search {
  position: relative;
  max-width: 500px;
  margin: 0 auto;
}

.nova-search-input {
  width: 100%;
  padding: var(--nova-space-lg) var(--nova-space-xl) var(--nova-space-lg) var(--nova-space-2xl);
  background: var(--nova-surface);
  border: 2px solid var(--nova-border);
  border-radius: var(--nova-radius-full);
  color: var(--nova-text);
  font-size: 1rem;
  transition: all var(--nova-transition);
}

.nova-search-input:focus {
  outline: none;
  border-color: var(--nova-primary);
  box-shadow: 0 0 0 3px rgba(var(--nova-primary-rgb), 0.1), var(--nova-shadow-glow);
}

.nova-search-icon {
  position: absolute;
  left: var(--nova-space);
  top: 50%;
  transform: translateY(-50%);
  color: var(--nova-text-muted);
  pointer-events: none;
}

/* Loading Spinner */
.nova-spinner {
  width: 40px;
  height: 40px;
  border: 4px solid var(--nova-surface-light);
  border-top: 4px solid var(--nova-primary);
  border-radius: var(--nova-radius-full);
  animation: nova-spin 1s linear infinite;
}

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

/* Badges */
.nova-badge {
  display: inline-flex;
  align-items: center;
  padding: var(--nova-space-xs) var(--nova-space-sm);
  background: var(--nova-gradient-primary);
  color: white;
  font-size: 0.75rem;
  font-weight: 600;
  border-radius: var(--nova-radius-full);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.nova-badge-secondary {
  background: var(--nova-gradient-accent);
}

.nova-badge-outline {
  background: transparent;
  color: var(--nova-primary);
  border: 1px solid var(--nova-primary);
}

/* Tabs */
.nova-tabs {
  display: flex;
  border-bottom: 2px solid var(--nova-border);
  margin-bottom: var(--nova-space-xl);
}

.nova-tab {
  padding: var(--nova-space) var(--nova-space-lg);
  color: var(--nova-text-secondary);
  border: none;
  background: none;
  cursor: pointer;
  transition: all var(--nova-transition);
  position: relative;
}

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

.nova-tab.active {
  color: var(--nova-primary);
}

.nova-tab.active::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--nova-gradient-primary);
}

/* Modal */
.nova-modal {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.8);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  backdrop-filter: blur(5px);
}

.nova-modal-content {
  background: var(--nova-surface);
  border: 1px solid var(--nova-border);
  border-radius: var(--nova-radius-2xl);
  padding: var(--nova-space-2xl);
  max-width: 500px;
  width: 90%;
  max-height: 90vh;
  overflow-y: auto;
  box-shadow: var(--nova-shadow-xl);
  animation: nova-slideUp var(--nova-transition);
}

@keyframes nova-slideUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Tooltips */
.nova-tooltip {
  position: relative;
}

.nova-tooltip::after {
  content: attr(data-tooltip);
  position: absolute;
  bottom: 100%;
  left: 50%;
  transform: translateX(-50%);
  background: var(--nova-surface-light);
  color: var(--nova-text);
  padding: var(--nova-space-xs) var(--nova-space-sm);
  border-radius: var(--nova-radius);
  font-size: 0.75rem;
  white-space: nowrap;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--nova-transition);
  margin-bottom: var(--nova-space-xs);
}

.nova-tooltip:hover::after {
  opacity: 1;
}

/* Progress Bar */
.nova-progress {
  width: 100%;
  height: 8px;
  background: var(--nova-surface-light);
  border-radius: var(--nova-radius-full);
  overflow: hidden;
}

.nova-progress-bar {
  height: 100%;
  background: var(--nova-gradient-primary);
  border-radius: var(--nova-radius-full);
  transition: width var(--nova-transition);
  position: relative;
  overflow: hidden;
}

.nova-progress-bar::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  bottom: 0;
  right: 0;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.3), transparent);
  animation: nova-shimmer 2s infinite;
}

@keyframes nova-shimmer {
  0% { transform: translateX(-100%); }
  100% { transform: translateX(100%); }
}

/* Alerts */
.nova-alert {
  padding: var(--nova-space) var(--nova-space-lg);
  border-radius: var(--nova-radius-lg);
  margin-bottom: var(--nova-space);
  display: flex;
  align-items: center;
  gap: var(--nova-space);
}

.nova-alert-info {
  background: rgba(var(--nova-primary-rgb), 0.1);
  border: 1px solid rgba(var(--nova-primary-rgb), 0.3);
  color: var(--nova-primary-light);
}

.nova-alert-success {
  background: rgba(34, 197, 94, 0.1);
  border: 1px solid rgba(34, 197, 94, 0.3);
  color: #4ade80;
}

.nova-alert-warning {
  background: rgba(245, 158, 11, 0.1);
  border: 1px solid rgba(245, 158, 11, 0.3);
  color: #fbbf24;
}

.nova-alert-error {
  background: rgba(239, 68, 68, 0.1);
  border: 1px solid rgba(239, 68, 68, 0.3);
  color: #f87171;
}

/* Responsive Design */
@media (max-width: 768px) {
  h1 { font-size: 2rem; }
  h2 { font-size: 1.5rem; }
  h3 { font-size: 1.25rem; }
  
  .nova-card {
    padding: var(--nova-space-lg);
  }
  
  .nova-modal-content {
    padding: var(--nova-space-xl);
  }
  
  .nova-tabs {
    overflow-x: auto;
  }
}

/* Animations */
.nova-fade-in {
  animation: nova-fadeIn var(--nova-transition) ease-in-out;
}

.nova-slide-in-left {
  animation: nova-slideInLeft var(--nova-transition) ease-in-out;
}

.nova-slide-in-right {
  animation: nova-slideInRight var(--nova-transition) ease-in-out;
}

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

@keyframes nova-slideInLeft {
  from {
    opacity: 0;
    transform: translateX(-20px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes nova-slideInRight {
  from {
    opacity: 0;
    transform: translateX(20px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

/* Special Effects */
.nova-glow {
  box-shadow: var(--nova-shadow-glow);
}

.nova-glow-accent {
  box-shadow: var(--nova-shadow-glow-accent);
}

.nova-gradient-text {
  background: var(--nova-gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.nova-gradient-border {
  position: relative;
  background: var(--nova-surface);
  border-radius: var(--nova-radius-lg);
}

.nova-gradient-border::before {
  content: '';
  position: absolute;
  inset: -2px;
  background: var(--nova-gradient-primary);
  border-radius: inherit;
  z-index: -1;
  opacity: 0.8;
}

/* Dark Mode Enhancements */
@media (prefers-color-scheme: dark) {
  :root {
    --nova-background: #0a0e1a;
    --nova-surface: #151923;
    --nova-surface-light: #1e2430;
  }
}

/* Focus States */
.nova-focus-ring:focus {
  outline: none;
  box-shadow: 0 0 0 3px rgba(var(--nova-primary-rgb), 0.3);
}

/* Interactive Elements */
.nova-interactive {
  transition: all var(--nova-transition);
  cursor: pointer;
}

.nova-interactive:hover {
  transform: scale(1.05);
}

.nova-interactive:active {
  transform: scale(0.95);
}

/* Glass Morphism Effects */
.nova-glass {
  background: rgba(255, 255, 255, 0.05);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.1);
}

/* Particle Background Effect */
.nova-particles {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  overflow: hidden;
  z-index: -1;
}

.nova-particle {
  position: absolute;
  width: 2px;
  height: 2px;
  background: var(--nova-primary);
  border-radius: var(--nova-radius-full);
  opacity: 0.3;
  animation: nova-float 10s infinite ease-in-out;
}

@keyframes nova-float {
  0%, 100% {
    transform: translateY(0) translateX(0);
  }
  25% {
    transform: translateY(-20px) translateX(10px);
  }
  50% {
    transform: translateY(10px) translateX(-10px);
  }
  75% {
    transform: translateY(-10px) translateX(20px);
  }
}