/* CSS Custom Properties */
:root {
  /* Colors */
  --body-bg: #c9df8ab3;
  --color-primary: #8ACE00;
  --color-primary-dark: #7AB600;
  --color-secondary: #7AB600;
  --color-accent: #9ADE10;
  --color-success: #8ACE00;
  --color-warning: #F59E0B;
  --color-error: #EF4444;
  --hero-bg:#f3fae5;
  --hero-title:#8ACE00;
  
  /* Text Colors */
  --color-text-primary: #1a2e1a;
  --color-text-secondary: #4a5c4a;
  --color-text-muted: #6b7c6b;
  --color-text-inverse: #FFFFFF;
  
  /* Background Colors */
  --color-bg-primary: #ffffff;
  --color-bg-secondary: #f8fdf5;
  --color-bg-tertiary: #f0f9e8;
  --color-bg-dark: #0F172A;
  --color-bg-overlay: rgba(0, 0, 0, 0.5);
  
  /* Border Colors */
  --color-border: #E2E8F0;
  --color-border-muted: #F1F5F9;
  --color-border-dark: #334155;
  
  /* Spacing */
  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --spacing-md: 0.75rem;
  --spacing-lg: 1rem;
  --spacing-xl: 1.25rem;
  --spacing-2xl: 1.5rem;
  --spacing-3xl: 2rem;
  --spacing-4xl: 2.5rem;
  --spacing-5xl: 3rem;
  
  /* Border Radius */
  --radius-sm: 0.25rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-2xl: 1.5rem;
  
  /* 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), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
  
  /* Typography */
  --font-family-primary: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-family-secondary: 'Poppins', sans-serif;
  --font-family-mono: 'JetBrains Mono', monospace;
  
  /* Font Weights */
  --font-weight-normal: 400;
  --font-weight-medium: 500;
  --font-weight-semibold: 600;
  --font-weight-bold: 700;
  --font-weight-extrabold: 800;
  
  /* Font Sizes */
  --font-size-xs: 0.75rem;
  --font-size-sm: 0.875rem;
  --font-size-base: 1rem;
  --font-size-lg: 1.125rem;
  --font-size-xl: 1.25rem;
  --font-size-2xl: 1.5rem;
  --font-size-3xl: 1.875rem;
  --font-size-4xl: 2.25rem;
  
  /* Z-Index */
  --z-index-dropdown: 1000;
  --z-index-sticky: 1020;
  --z-index-fixed: 1030;
  --z-index-modal: 1050;
  --z-index-popover: 1060;
  --z-index-tooltip: 1070;
  
  /* Transitions */
  --transition-fast: 150ms ease-in-out;
  --transition-normal: 250ms ease-in-out;
  --transition-slow: 350ms ease-in-out;
}

/* Dark Mode Variables */
[data-theme="dark"] {
  --body-bg: linear-gradient(135deg, #3d4964 0%, #000000 100%);
  --color-text-primary: #F8FAFC;
  --color-text-secondary: #CBD5E1;
  --color-text-muted: #94A3B8;
  --color-text-inverse: #0F172A;
  
  --color-bg-primary: #0F172A;
  --color-bg-secondary: #1E293B;
  --color-bg-tertiary: #334155;
  
  --color-border: #334155;
  --color-border-muted: #1E293B;
  --color-border-dark: #475569;
   --hero-bg:#0f172a;
   --hero-title:#ffffff;
}

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

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

body {
  font-family: var(--font-family-primary);
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-normal);
  line-height: 1.6;
  color: var(--color-text-primary);
  background: var(--body-bg);
  overflow-x: hidden;
  transition: background-color var(--transition-normal), color var(--transition-normal);
}

/* Focus Styles */
*:focus {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

*:focus:not(:focus-visible) {
  outline: none;
}

/* Main Layout */
.app-container {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.app-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--spacing-lg) var(--spacing-xl);
  background-color: var(--color-bg-secondary);
  border-bottom: 1px solid var(--color-border);
  position: sticky;
  top: 0;
  z-index: var(--z-index-sticky);
  backdrop-filter: blur(8px);
}

.app-title {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  font-size: var(--font-size-2xl);
  font-weight: var(--font-weight-bold);
  color: var(--color-text-primary);
}

.app-title i {
  color: var(--color-primary);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
}

.main-content {
  display: grid;
  grid-template-columns: 1fr 400px;
  grid-template-areas: 
    "preview controls";
  gap: var(--spacing-3xl);
  padding: var(--spacing-3xl);
  flex: 1;
  max-width: 1440px;
  margin: 0 auto;
  width: 100%;
}

/* Preview Panel */
.preview-panel {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xl);
  grid-area: preview;
}

/* Controls Panel */
.controls-panel {
  grid-area: controls;
}

/* Export Panel - Hidden on desktop, shown on mobile */
.export-panel {
  display: none;
  grid-area: export;
  background-color: var(--color-bg-secondary);
  border-radius: var(--radius-2xl);
  padding: var(--spacing-2xl);
  box-shadow: var(--shadow-lg);
}

/* Gallery Panel - Visible on all screen sizes */
.gallery-panel {
  display: block;
  grid-area: gallery;
  background-color: var(--color-bg-secondary);
  border-radius: var(--radius-2xl);
  padding: var(--spacing-2xl);
  box-shadow: var(--shadow-lg);
}

/* Desktop only elements */
.desktop-only {
  display: block;
}

/* Mobile only elements */
.mobile-only {
  display: none;
}

.preview-container {
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: var(--color-bg-secondary);
  border-radius: var(--radius-2xl);
  padding: var(--spacing-4xl);
  box-shadow: var(--shadow-lg);
  position: relative;
  overflow: hidden;
}

.preview-container::before {
  content: '';
  position: absolute;
  inset: 0;
  background: 
    linear-gradient(45deg, transparent 25%, rgba(255,255,255,0.05) 25%, rgba(255,255,255,0.05) 50%, transparent 50%, transparent 75%, rgba(255,255,255,0.05) 75%),
    linear-gradient(-45deg, transparent 25%, rgba(255,255,255,0.05) 25%, rgba(255,255,255,0.05) 50%, transparent 50%, transparent 75%, rgba(255,255,255,0.05) 75%);
  background-size: 20px 20px;
  pointer-events: none;
  opacity: 0.3;
}

#previewCanvas {
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-md);
  max-width: 100%;
  max-height: 70vh;
  width: auto;
  height: auto;
  position: relative;
  z-index: 1;
}

.preview-controls {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-md);
}

/* Controls Panel */
.controls-panel {
  background-color: var(--color-bg-secondary);
  border-radius: var(--radius-xl);
  padding: var(--spacing-xl);
  box-shadow: var(--shadow-md);
  height: fit-content;
  max-height: calc(100vh - 120px);
  overflow-y: auto;
  position: sticky;
  top: var(--spacing-xl);
  align-self: flex-start;
}

/* Mobile Export Footer */


/* Typography */
h1, h2, h3, h4, h5, h6 {
  font-weight: var(--font-weight-semibold);
  line-height: 1.3;
  margin-bottom: var(--spacing-md);
}

h1 { font-size: var(--font-size-4xl); }
h2 { font-size: var(--font-size-3xl); }
h3 { font-size: var(--font-size-2xl); }
h4 { font-size: var(--font-size-xl); }
h5 { font-size: var(--font-size-lg); }
h6 { font-size: var(--font-size-base); }

p {
  margin-bottom: var(--spacing-lg);
}

/* Utility Classes */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.font-semibold { font-weight: var(--font-weight-semibold); }
.font-bold { font-weight: var(--font-weight-bold); }

.text-primary { color: var(--color-primary); }
.text-secondary { color: var(--color-text-secondary); }
.text-muted { color: var(--color-text-muted); }

.bg-primary { background-color: var(--color-primary); }
.bg-secondary { background-color: var(--color-bg-secondary); }

.hidden { display: none !important; }
.visible { visibility: visible; }
.invisible { visibility: hidden; }

/* Animation Utilities */
.animate-spin {
  animation: spin 1s linear infinite;
}

.animate-pulse {
  animation: pulse 2s cubic-bezier(0.4, 0, 0.6, 1) infinite;
}

.animate-bounce {
  animation: bounce 1s infinite;
}

@keyframes spin {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.5; }
}

@keyframes bounce {
  0%, 100% {
    transform: translateY(-25%);
    animation-timing-function: cubic-bezier(0.8, 0, 1, 1);
  }
  50% {
    transform: translateY(0);
    animation-timing-function: cubic-bezier(0, 0, 0.2, 1);
  }
}

/* Loading States */
.loading {
  opacity: 0.6;
  pointer-events: none;
  cursor: not-allowed;
}

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