:root {
  /* Color Palette - Luxury Art Gallery */
  --color-black: #000000;
  --color-charcoal: #1a1a1a;
  --color-dark-gray: #2a2a2a;
  --color-medium-gray: #6a6a6a;
  --color-light-gray: #e5e5e5;
  --color-off-white: #f8f8f8;
  --color-white: #ffffff;
  
  /* Accent Colors */
  --color-gold: #c9a961;
  --color-gold-light: #d4bd8a;
  --color-gold-dark: #9e8548;
  
  /* Typography */
  --font-heading: 'Cormorant Garamond', 'Georgia', serif;
  --font-body: 'Inter', -apple-system, sans-serif;
  --font-accent: 'Lora', serif;
  
  /* Font Sizes - Fluid Typography */
  --text-xs: clamp(0.75rem, 0.7rem + 0.25vw, 0.875rem);
  --text-sm: clamp(0.875rem, 0.8rem + 0.375vw, 1rem);
  --text-base: clamp(1rem, 0.95rem + 0.25vw, 1.125rem);
  --text-lg: clamp(1.125rem, 1rem + 0.625vw, 1.5rem);
  --text-xl: clamp(1.5rem, 1.3rem + 1vw, 2rem);
  --text-2xl: clamp(2rem, 1.6rem + 2vw, 3rem);
  --text-3xl: clamp(2.5rem, 2rem + 2.5vw, 4rem);
  --text-4xl: clamp(3rem, 2.5rem + 3vw, 5rem);
  
  /* Spacing System */
  --space-xs: 0.5rem;
  --space-sm: 1rem;
  --space-md: 1.5rem;
  --space-lg: 2.5rem;
  --space-xl: 4rem;
  --space-2xl: 6rem;
  --space-3xl: 8rem;
  
  /* Layout */
  --max-width: 1400px;
  --content-width: 1200px;
  --narrow-width: 800px;
  
  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-base: 300ms ease;
  --transition-slow: 500ms ease;
  --transition-smooth: 600ms cubic-bezier(0.4, 0, 0.2, 1);
  
  /* Shadows */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.15);
  
  /* Z-index Scale */
  --z-base: 1;
  --z-dropdown: 100;
  --z-sticky: 200;
  --z-fixed: 300;
  --z-modal: 400;
  --z-tooltip: 500;
}

/* Dark Theme Variables */
[data-theme="dark"] {
  --color-background: var(--color-charcoal);
  --color-surface: var(--color-dark-gray);
  --color-text-primary: var(--color-off-white);
  --color-text-secondary: var(--color-light-gray);
  --color-text-muted: var(--color-medium-gray);
  --color-border: rgba(255, 255, 255, 0.1);
}

/* Light Theme Variables (Default) */
:root,
[data-theme="light"] {
  --color-background: var(--color-white);
  --color-surface: var(--color-off-white);
  --color-text-primary: var(--color-charcoal);
  --color-text-secondary: var(--color-dark-gray);
  --color-text-muted: var(--color-medium-gray);
  --color-border: rgba(0, 0, 0, 0.1);
}

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

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

body {
  font-family: var(--font-body);
  font-size: var(--text-base);
  line-height: 1.6;
  color: var(--color-text-primary);
  background-color: var(--color-background);
  transition: background-color var(--transition-base), color var(--transition-base);
}

/* Typography Styles */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: 400;
  line-height: 1.2;
  letter-spacing: -0.01em;
  color: var(--color-text-primary);
}

h1 {
  font-size: var(--text-4xl);
  margin-bottom: var(--space-lg);
}

h2 {
  font-size: var(--text-3xl);
  margin-bottom: var(--space-md);
}

h3 {
  font-size: var(--text-2xl);
  margin-bottom: var(--space-md);
}

h4 {
  font-size: var(--text-xl);
  margin-bottom: var(--space-sm);
}

p {
  margin-bottom: var(--space-md);
  color: var(--color-text-secondary);
}

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

a:hover {
  color: var(--color-gold);
}

/* Utility Classes */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--space-md);
  padding-right: var(--space-md);
}

.container-narrow {
  max-width: var(--narrow-width);
}

.section {
  padding-top: var(--space-2xl);
  padding-bottom: var(--space-2xl);
}

.section-lg {
  padding-top: var(--space-3xl);
  padding-bottom: var(--space-3xl);
}

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

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

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

.animate-fade-in {
  animation: fadeIn var(--transition-smooth) ease-out;
}

.animate-fade-in-up {
  animation: fadeInUp var(--transition-smooth) ease-out;
}

.animate-scale-in {
  animation: scaleIn var(--transition-smooth) ease-out;
}

/* Button Styles */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-sm) var(--space-lg);
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-weight: 500;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  border: none;
  cursor: pointer;
  transition: all var(--transition-base);
  position: relative;
  overflow: hidden;
}

.btn-primary {
  background-color: var(--color-charcoal);
  color: var(--color-white);
  border: 1px solid var(--color-charcoal);
}

.btn-primary:hover {
  background-color: var(--color-dark-gray);
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.btn-outline {
  background-color: transparent;
  color: var(--color-charcoal);
  border: 1px solid var(--color-charcoal);
}

.btn-outline:hover {
  background-color: var(--color-charcoal);
  color: var(--color-white);
}

.btn-gold {
  background-color: var(--color-gold);
  color: var(--color-charcoal);
  border: 1px solid var(--color-gold);
}

.btn-gold:hover {
  background-color: var(--color-gold-dark);
  border-color: var(--color-gold-dark);
  transform: translateY(-2px);
}

/* Image Styles */
img {
  max-width: 100%;
  height: auto;
  display: block;
}

.image-cover {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.image-contain {
  width: 100%;
  height: 100%;
  object-fit: contain;
}

/* Aspect Ratio Utilities */
.aspect-square {
  aspect-ratio: 1 / 1;
}

.aspect-portrait {
  aspect-ratio: 3 / 4;
}

.aspect-landscape {
  aspect-ratio: 4 / 3;
}

.aspect-wide {
  aspect-ratio: 16 / 9;
}

/* Responsive Breakpoints */
@media (max-width: 768px) {
  :root {
    --space-xl: 3rem;
    --space-2xl: 4rem;
    --space-3xl: 5rem;
  }
  
  .container {
    padding-left: var(--space-sm);
    padding-right: var(--space-sm);
  }
}

@media (max-width: 480px) {
  :root {
    --space-lg: 2rem;
    --space-xl: 2.5rem;
    --space-2xl: 3rem;
  }
}