/**
 * World-Class UI Framework
 * Modern, trendy design system for MuseFlow
 * Inspired by: Apple Vision Pro, Linear, Stripe, Vercel
 */

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

/* ============================================================================
   GLOBAL RESETS & BASE
   ============================================================================ */

:root {
  /* Color Palette - Neon Purple & Pink */
  --primary-purple: #8b5cf6;
  --primary-pink: #ec4899;
  --secondary-blue: #3b82f6;
  --secondary-green: #10b981;
  
  /* Dark Theme Colors */
  --bg-dark-1: #0f0a1f;
  --bg-dark-2: #1e1b4b;
  --bg-dark-3: #2d1b69;
  
  /* Glass Effect */
  --glass-bg: rgba(255, 255, 255, 0.1);
  --glass-border: rgba(255, 255, 255, 0.2);
  
  /* Shadows */
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.1);
  --shadow-md: 0 8px 32px rgba(0, 0, 0, 0.2);
  --shadow-lg: 0 20px 60px rgba(0, 0, 0, 0.3);
  --shadow-xl: 0 40px 120px rgba(0, 0, 0, 0.4);
  
  /* Neon Glow */
  --glow-purple: 0 0 20px rgba(139, 92, 246, 0.6), 0 0 40px rgba(139, 92, 246, 0.3);
  --glow-pink: 0 0 20px rgba(236, 72, 153, 0.6), 0 0 40px rgba(236, 72, 153, 0.3);
  --glow-blue: 0 0 20px rgba(59, 130, 246, 0.6), 0 0 40px rgba(59, 130, 246, 0.3);
  
  /* Spacing */
  --space-xs: 4px;
  --space-sm: 8px;
  --space-md: 16px;
  --space-lg: 24px;
  --space-xl: 32px;
  --space-2xl: 48px;
  --space-3xl: 64px;
  
  /* Border Radius */
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --radius-2xl: 32px;
  --radius-full: 9999px;
  
  /* Typography */
  --font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-size-xs: 12px;
  --font-size-sm: 14px;
  --font-size-base: 16px;
  --font-size-lg: 18px;
  --font-size-xl: 20px;
  --font-size-2xl: 24px;
  --font-size-3xl: 30px;
  --font-size-4xl: 36px;
  --font-size-5xl: 48px;
  
  /* 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);
}

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

body {
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  line-height: 1.6;
  color: white;
  background: radial-gradient(ellipse at top, var(--bg-dark-2) 0%, var(--bg-dark-1) 50%, #000000 100%);
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* ============================================================================
   GLASSMORPHISM COMPONENTS
   ============================================================================ */

.glass-card {
  background: var(--glass-bg);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-md);
  transition: all var(--transition-base);
}

.glass-card:hover {
  border-color: rgba(139, 92, 246, 0.5);
  box-shadow: var(--shadow-lg), var(--glow-purple);
  transform: translateY(-4px);
}

.glass-card-sm {
  padding: var(--space-md);
  border-radius: var(--radius-md);
}

.glass-card-md {
  padding: var(--space-lg);
  border-radius: var(--radius-lg);
}

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

/* ============================================================================
   NEUMORPHISM COMPONENTS
   ============================================================================ */

.neuro-button {
  background: linear-gradient(145deg, #1a1a2e, #0f0f1e);
  box-shadow: 
    8px 8px 16px rgba(0, 0, 0, 0.4),
    -8px -8px 16px rgba(255, 255, 255, 0.05);
  border: none;
  border-radius: var(--radius-lg);
  padding: var(--space-md) var(--space-xl);
  color: white;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-base);
}

.neuro-button:hover {
  box-shadow: 
    4px 4px 8px rgba(0, 0, 0, 0.5),
    -4px -4px 8px rgba(255, 255, 255, 0.08);
  transform: translateY(-2px);
}

.neuro-button:active {
  box-shadow: 
    inset 4px 4px 8px rgba(0, 0, 0, 0.6),
    inset -4px -4px 8px rgba(255, 255, 255, 0.03);
  transform: translateY(0);
}

/* ============================================================================
   GRADIENT COMPONENTS
   ============================================================================ */

.gradient-bg-purple {
  background: linear-gradient(135deg, var(--primary-purple) 0%, var(--primary-pink) 100%);
}

.gradient-bg-blue {
  background: linear-gradient(135deg, var(--secondary-blue) 0%, var(--primary-purple) 100%);
}

.gradient-bg-green {
  background: linear-gradient(135deg, var(--secondary-green) 0%, var(--secondary-blue) 100%);
}

.gradient-text {
  background: linear-gradient(135deg, var(--primary-purple) 0%, var(--primary-pink) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.gradient-border {
  position: relative;
  border-radius: var(--radius-xl);
}

.gradient-border::before {
  content: '';
  position: absolute;
  inset: -2px;
  background: linear-gradient(135deg, var(--primary-purple), var(--primary-pink));
  border-radius: var(--radius-xl);
  z-index: -1;
  opacity: 0.5;
  transition: opacity var(--transition-base);
}

.gradient-border:hover::before {
  opacity: 1;
}

/* ============================================================================
   BUTTONS
   ============================================================================ */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  padding: var(--space-md) var(--space-xl);
  border-radius: var(--radius-lg);
  font-weight: 600;
  font-size: var(--font-size-base);
  cursor: pointer;
  transition: all var(--transition-base);
  border: none;
  text-decoration: none;
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary-purple) 0%, var(--primary-pink) 100%);
  color: white;
  box-shadow: var(--shadow-md);
}

.btn-primary:hover {
  box-shadow: var(--shadow-lg), var(--glow-purple);
  transform: translateY(-2px) scale(1.02);
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.1);
  color: white;
  border: 1px solid rgba(255, 255, 255, 0.2);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.15);
  border-color: rgba(139, 92, 246, 0.5);
}

.btn-ghost {
  background: transparent;
  color: white;
  border: 1px solid transparent;
}

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

.btn-lg {
  padding: var(--space-lg) var(--space-2xl);
  font-size: var(--font-size-lg);
  border-radius: var(--radius-xl);
}

.btn-sm {
  padding: var(--space-sm) var(--space-md);
  font-size: var(--font-size-sm);
  border-radius: var(--radius-md);
}

/* ============================================================================
   CARDS
   ============================================================================ */

.card {
  background: var(--glass-bg);
  backdrop-filter: blur(20px);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-xl);
  padding: var(--space-xl);
  transition: all var(--transition-base);
}

.card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-lg), var(--glow-purple);
  border-color: rgba(139, 92, 246, 0.5);
}

.card-interactive {
  cursor: pointer;
}

.card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-lg);
}

.card-title {
  font-size: var(--font-size-xl);
  font-weight: 700;
  color: white;
}

.card-description {
  color: rgba(255, 255, 255, 0.7);
  margin-top: var(--space-sm);
}

.card-footer {
  margin-top: var(--space-lg);
  padding-top: var(--space-lg);
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

/* ============================================================================
   NEON EFFECTS
   ============================================================================ */

.neon-glow-purple {
  box-shadow: var(--glow-purple);
}

.neon-glow-pink {
  box-shadow: var(--glow-pink);
}

.neon-glow-blue {
  box-shadow: var(--glow-blue);
}

.neon-border {
  border: 2px solid;
  border-image: linear-gradient(135deg, var(--primary-purple), var(--primary-pink)) 1;
}

/* ============================================================================
   ANIMATIONS
   ============================================================================ */

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

@keyframes slideInRight {
  from {
    opacity: 0;
    transform: translateX(30px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes scaleIn {
  from {
    opacity: 0;
    transform: scale(0.9);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}

@keyframes float {
  0%, 100% {
    transform: translateY(0);
  }
  50% {
    transform: translateY(-10px);
  }
}

@keyframes pulse {
  0%, 100% {
    opacity: 1;
  }
  50% {
    opacity: 0.8;
  }
}

@keyframes shimmer {
  0% {
    background-position: -1000px 0;
  }
  100% {
    background-position: 1000px 0;
  }
}

.fade-in {
  animation: fadeIn 0.6s ease-out;
}

.slide-in-right {
  animation: slideInRight 0.6s ease-out;
}

.scale-in {
  animation: scaleIn 0.6s ease-out;
}

.float {
  animation: float 3s ease-in-out infinite;
}

.pulse {
  animation: pulse 2s ease-in-out infinite;
}

/* ============================================================================
   FLOATING NAVIGATION
   ============================================================================ */

.floating-nav {
  position: fixed;
  top: var(--space-lg);
  left: 50%;
  transform: translateX(-50%);
  z-index: 1000;
  background: var(--glass-bg);
  backdrop-filter: blur(20px);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-full);
  padding: var(--space-sm) var(--space-md);
  box-shadow: var(--shadow-lg);
}

.floating-nav-items {
  display: flex;
  gap: var(--space-sm);
  list-style: none;
}

.floating-nav-item {
  padding: var(--space-sm) var(--space-lg);
  border-radius: var(--radius-full);
  color: rgba(255, 255, 255, 0.8);
  text-decoration: none;
  transition: all var(--transition-base);
}

.floating-nav-item:hover,
.floating-nav-item.active {
  background: rgba(139, 92, 246, 0.3);
  color: white;
}

/* ============================================================================
   LOADING STATES
   ============================================================================ */

.skeleton {
  background: linear-gradient(
    90deg,
    rgba(255, 255, 255, 0.1) 0%,
    rgba(255, 255, 255, 0.2) 50%,
    rgba(255, 255, 255, 0.1) 100%
  );
  background-size: 200% 100%;
  animation: shimmer 1.5s infinite;
  border-radius: var(--radius-md);
}

.spinner {
  width: 40px;
  height: 40px;
  border: 4px solid rgba(255, 255, 255, 0.2);
  border-top-color: var(--primary-purple);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

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

/* ============================================================================
   UTILITY CLASSES
   ============================================================================ */

.text-gradient {
  background: linear-gradient(135deg, var(--primary-purple) 0%, var(--primary-pink) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.text-white { color: white; }
.text-purple-200 { color: rgba(167, 139, 250, 0.8); }
.text-purple-300 { color: rgba(167, 139, 250, 0.9); }
.text-purple-400 { color: rgba(167, 139, 250, 1); }

.bg-dark-1 { background: var(--bg-dark-1); }
.bg-dark-2 { background: var(--bg-dark-2); }
.bg-dark-3 { background: var(--bg-dark-3); }

.rounded-sm { border-radius: var(--radius-sm); }
.rounded-md { border-radius: var(--radius-md); }
.rounded-lg { border-radius: var(--radius-lg); }
.rounded-xl { border-radius: var(--radius-xl); }
.rounded-2xl { border-radius: var(--radius-2xl); }
.rounded-full { border-radius: var(--radius-full); }

.shadow-sm { box-shadow: var(--shadow-sm); }
.shadow-md { box-shadow: var(--shadow-md); }
.shadow-lg { box-shadow: var(--shadow-lg); }
.shadow-xl { box-shadow: var(--shadow-xl); }

/* ============================================================================
   RESPONSIVE DESIGN
   ============================================================================ */

@media (max-width: 768px) {
  .glass-card {
    padding: var(--space-md);
  }
  
  .btn-lg {
    padding: var(--space-md) var(--space-lg);
    font-size: var(--font-size-base);
  }
  
  .floating-nav {
    left: var(--space-md);
    right: var(--space-md);
    transform: none;
  }
}

/* ============================================================================
   DARK MODE ENHANCEMENTS
   ============================================================================ */

@media (prefers-color-scheme: dark) {
  body {
    color-scheme: dark;
  }
}