/* Sticker Cropper App - Modern Styles */

/* CSS Variables */
:root {
  /* Purple theme colors */
  --primary-color: #a855f7;
  --primary-hover: #9333ea;
  --primary-light: rgba(168, 85, 247, 0.1);
  --primary-selected: rgba(168, 85, 247, 0.3);
  
  /* Grid colors */
  --grid-line-color: rgba(168, 85, 247, 0.8);
  --grid-line-dragging: rgba(168, 85, 247, 1);
  
  /* Transitions */
  --transition-fast: 0.15s ease;
  --transition-normal: 0.3s ease;
  --transition-slow: 0.5s ease;
}

/* Critical CSS for above-the-fold content */
/* Inline critical styles here for faster loading */

/* Preload key fonts */
@font-face {
  font-family: 'Inter';
  font-style: normal;
  font-weight: 400;
  font-display: swap;
  src: url('https://fonts.gstatic.com/s/inter/v12/UcCO3FwrK3iLTeHuS_fvQtMwCp50KnMw2boKoduKmMEVuLyfAZ9hiJ-Ek-_EeA.woff2') format('woff2');
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+2000-206F, U+2074, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}

/* Base styles */
* {
  box-sizing: border-box;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  margin: 0;
  padding: 0;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

/* Canvas styles */
.canvas-container {
  touch-action: none;
  user-select: none;
  -webkit-user-select: none;
  -moz-user-select: none;
  -ms-user-select: none;
  position: relative;
  display: flex;
  justify-content: center;
  align-items: center;
}

.canvas {
  cursor: crosshair;
  touch-action: none;
  user-select: none;
  -webkit-user-select: none;
  -moz-user-select: none;
  -ms-user-select: none;
  display: block;
  max-width: 100%;
  max-height: 100%;
  object-fit: contain;
  border-radius: 1rem;
}

/* Prevent image distortion on mobile */
@media (max-width: 768px) {
  .canvas-container {
    width: 100%;
    overflow: hidden;
  }
  
  .canvas {
    width: 100% !important;
    height: auto !important;
    max-width: 100% !important;
    object-fit: contain !important;
  }
}

/* Message overlay styles */
.message-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.6);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  display: none;
  justify-content: center;
  align-items: center;
  z-index: 1000;
  padding: 1rem;
}

.message-box {
  background: white;
  border-radius: 1.5rem;
  padding: 2rem;
  max-width: 90vw;
  max-height: 90vh;
  box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
  border: 1px solid rgba(168, 85, 247, 0.1);
  animation: messageSlideIn 0.3s ease-out;
}

.message-text {
  margin-bottom: 1.5rem;
  font-size: 1.1rem;
  line-height: 1.6;
  color: #374151;
  text-align: center;
}

.message-actions {
  display: flex;
  gap: 0.75rem;
  justify-content: center;
  flex-wrap: wrap;
}

@keyframes messageSlideIn {
  from {
    opacity: 0;
    transform: translateY(-20px) scale(0.95);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

/* Loading spinner */
.loading-spinner {
  display: inline-block;
  width: 1.5rem;
  height: 1.5rem;
  border: 2px solid #e5e7eb;
  border-top: 2px solid var(--primary-color);
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

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

/* Sticker preview styles */
.sticker-preview {
  position: relative;
  width: 5rem;
  height: 5rem;
  border-radius: 0.75rem;
  box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
  border: 2px solid transparent;
  cursor: pointer;
  transition: all var(--transition-fast);
  overflow: hidden;
  background: white;
}

.sticker-preview:hover {
  transform: scale(1.05);
  box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
}

.sticker-preview.selected {
  border-color: var(--primary-color);
  box-shadow: 0 0 0 3px var(--primary-light);
}

.sticker-preview img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  border-radius: 0.5rem;
}

.sticker-checkmark {
  position: absolute;
  top: 0.25rem;
  right: 0.25rem;
  background: var(--primary-color);
  color: white;
  border-radius: 50%;
  width: 1.25rem;
  height: 1.25rem;
  display: flex;
  justify-content: center;
  align-items: center;
  font-size: 0.75rem;
  font-weight: 700;
  opacity: 0;
  transition: opacity var(--transition-fast);
}

.sticker-preview.selected .sticker-checkmark {
  opacity: 1;
}

.preview-empty {
  color: #6b7280;
  font-style: italic;
  text-align: center;
  padding: 2rem;
}

/* Animation utilities */
.fade-in {
  animation: fadeIn 0.3s ease-in-out;
}

.fade-out {
  animation: fadeOut 0.3s ease-in-out;
}

.slide-up {
  animation: slideUp 0.3s ease-out;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(-10px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes fadeOut {
  from { opacity: 1; }
  to { opacity: 0; }
}

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

/* Mobile optimizations */
@media (max-width: 640px) {
  .message-box {
    padding: 1.5rem;
    margin: 1rem;
  }
  
  .message-actions {
    flex-direction: column;
  }
  
  .message-actions button {
    width: 100%;
  }
  
  .sticker-preview {
    width: 4rem;
    height: 4rem;
  }
}

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

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

/* High contrast mode support */
@media (prefers-contrast: high) {
  :root {
    --primary-color: #7c3aed;
    --primary-hover: #6d28d9;
    --grid-line-color: #7c3aed;
    --grid-line-dragging: #7c3aed;
  }
}

/* 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;
  }
}

/* Optimize animations for better performance */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

/* GPU acceleration for animations */
.fade-in,
.fade-out,
.slide-up,
.sticker-preview {
  will-change: transform, opacity;
}

.fade-in,
.fade-out,
.slide-up {
  transform: translateZ(0);
}

/* Optimize canvas performance */
.canvas {
  image-rendering: -moz-crisp-edges;
  image-rendering: -webkit-crisp-edges;
  image-rendering: pixelated;
  image-rendering: crisp-edges;
}