/* Kelua Modern Design System - Professional UX/UI */

/* Advanced CSS Variables */
:root {
  /* Colors - Enhanced Gold Palette */
  --primary-gold: #ddbb76;
  --primary-gold-light: #e6c547;
  --primary-gold-dark: #b8960a;
  --primary-gold-bright: #ddbb76;
  --primary-gold-muted: #ddbb76;
  --secondary-black: #1a1a1a;
  --secondary-black-light: #2a2a2a;
  --accent-red: #e74c3c;
  --accent-green: #2ecc71;
  --accent-blue: #3498db;
  
  /* Glass Morphism */
  --glass-bg: rgba(255, 255, 255, 0.05);
  --glass-border: rgba(212, 175, 55, 0.2);
  --glass-backdrop: blur(20px) saturate(180%);
  
  /* Shadows */
  --shadow-soft: 0 8px 32px rgba(0, 0, 0, 0.1);
  --shadow-medium: 0 12px 48px rgba(0, 0, 0, 0.15);
  --shadow-hard: 0 20px 64px rgba(0, 0, 0, 0.25);
  --shadow-gold: 0 8px 32px rgba(212, 175, 55, 0.3);
  
  /* Animation Easings */
  --ease-in-out-back: cubic-bezier(0.68, -0.55, 0.265, 1.55);
  --ease-in-out-expo: cubic-bezier(0.87, 0, 0.13, 1);
  --ease-in-out-quart: cubic-bezier(0.25, 0.46, 0.45, 0.94);
  --ease-in-out-smooth: cubic-bezier(0.4, 0, 0.2, 1);
  
  /* Spacing Scale */
  --space-xs: 0.5rem;
  --space-sm: 1rem;
  --space-md: 1.5rem;
  --space-lg: 2rem;
  --space-xl: 3rem;
  --space-2xl: 4rem;
  --space-3xl: 6rem;
  
  /* Typography Scale */
  --font-xs: 0.75rem;
  --font-sm: 0.875rem;
  --font-base: 1rem;
  --font-lg: 1.125rem;
  --font-xl: 1.25rem;
  --font-2xl: 1.5rem;
  --font-3xl: 2rem;
  --font-4xl: 2.5rem;
  --font-5xl: 3rem;
  --font-6xl: 4rem;
  
  /* Border Radius */
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 20px;
  --radius-2xl: 24px;
  --radius-full: 9999px;
  
  /* Transitions */
  --transition-fast: 0.15s var(--ease-in-out-smooth);
  --transition-normal: 0.3s var(--ease-in-out-smooth);
  --transition-slow: 0.5s var(--ease-in-out-smooth);
  --transition-slowest: 0.8s var(--ease-in-out-smooth);
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: 120px;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
  line-height: 1.6;
  color: #1a1a1a;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Typography Improvements */
h1, h2, h3, h4, h5, h6 {
  font-family: 'Playfair Display', serif;
  font-weight: 600;
  line-height: 1.2;
  letter-spacing: -0.02em;
}

/* Enhanced Button System */
.btn {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  padding: var(--space-md) var(--space-lg);
  font-size: var(--font-lg);
  font-weight: 600;
  text-decoration: none;
  border: none;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition-normal);
  overflow: hidden;
  min-width: 200px;
  letter-spacing: 0.5px;
  transform: translateZ(0);
  will-change: transform, box-shadow;
}

.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 0.5s ease;
}

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

.btn-primary {
  background: linear-gradient(135deg, var(--primary-gold), var(--primary-gold-light));
  color: var(--secondary-black);
  box-shadow: var(--shadow-gold);
}

.btn-primary:hover {
  transform: translateY(-4px) scale(1.02);
  box-shadow: 0 16px 48px rgba(212, 175, 55, 0.4);
}

.btn-secondary {
  background: transparent;
  color: white;
  border: 2px solid rgba(255, 255, 255, 0.3);
  backdrop-filter: var(--glass-backdrop);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: var(--primary-gold);
  color: var(--primary-gold);
  transform: translateY(-4px);
}

/* Glass Morphism Card System */
.glass-card {
  background: var(--glass-bg);
  backdrop-filter: var(--glass-backdrop);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-xl);
  padding: var(--space-xl);
  transition: all var(--transition-slow);
  position: relative;
  overflow: hidden;
}

.glass-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
}

.glass-card:hover {
  transform: translateY(-8px) scale(1.02);
  background: rgba(255, 255, 255, 0.08);
  border-color: rgba(212, 175, 55, 0.4);
  box-shadow: var(--shadow-hard);
}

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

@keyframes fadeInScale {
  from {
    opacity: 0;
    transform: scale(0.95);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}

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

@keyframes pulse {
  0%, 100% {
    transform: scale(1);
    opacity: 1;
  }
  50% {
    transform: scale(1.05);
    opacity: 0.8;
  }
}

@keyframes shimmer {
  0% {
    background-position: -200% 0;
  }
  100% {
    background-position: 200% 0;
  }
}

/* Utility Classes */
.animate-fade-in-up {
  animation: fadeInUp 0.8s var(--ease-in-out-smooth) forwards;
}

.animate-fade-in-scale {
  animation: fadeInScale 0.6s var(--ease-in-out-back) forwards;
}

.animate-slide-in-right {
  animation: slideInRight 0.7s var(--ease-in-out-smooth) forwards;
}

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

.animate-shimmer {
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
  background-size: 200% 100%;
  animation: shimmer 2s infinite linear;
}

/* Enhanced Hover States */
.hover-lift {
  transition: all var(--transition-normal);
}

.hover-lift:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-medium);
}

.hover-scale {
  transition: all var(--transition-normal);
}

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

.hover-glow {
  transition: all var(--transition-normal);
}

.hover-glow:hover {
  box-shadow: 0 0 30px rgba(212, 175, 55, 0.5);
}

/* Loading States */
.loading {
  position: relative;
  pointer-events: none;
}

.loading::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 20px;
  height: 20px;
  margin: -10px 0 0 -10px;
  border: 2px solid transparent;
  border-top: 2px solid var(--primary-gold);
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

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

/* Focus States for Accessibility */
.btn:focus,
.nav-link:focus {
  outline: 2px solid var(--primary-gold);
  outline-offset: 2px;
}

/* Reduced Motion Support */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

/* Dark Theme Variables */
[data-theme="dark"] {
  --glass-bg: rgba(0, 0, 0, 0.3);
  --glass-border: rgba(212, 175, 55, 0.3);
}

/* Print Styles */
@media print {
  .navbar,
  .hero-social,
  .btn {
    display: none !important;
  }
}