picpeak/frontend/src/styles/image-protection.css

/* Image Protection CSS */

/* Base protection for all protected images */
.protected-image,
.protected-image img,
.protected-image canvas {
  /* Disable text selection */
  -webkit-user-select: none;
  -moz-user-select: none;
  -ms-user-select: none;
  user-select: none;
  
  /* Disable drag and drop */
  -webkit-user-drag: none;
  -khtml-user-drag: none;
  -moz-user-drag: none;
  -o-user-drag: none;
  user-drag: none;
  
  /* Disable touch callout on mobile */
  -webkit-touch-callout: none;
  
  /* Disable context menu */
  -webkit-context-menu: none;
  
  /* Disable outline */
  outline: none;
  
  /* Disable appearance */
  -webkit-appearance: none;
  -moz-appearance: none;
  appearance: none;
  
  /* Make images non-draggable */
  draggable: false;
}

/* Standard protection level */
.protection-standard {
  position: relative;
}

.protection-standard::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: transparent;
  z-index: 1;
  pointer-events: none;
}

/* Enhanced protection level */
.protection-enhanced {
  position: relative;
  overflow: hidden;
}

.protection-enhanced::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(
    45deg,
    transparent 49%,
    rgba(255, 255, 255, 0.01) 50%,
    transparent 51%
  );
  background-size: 20px 20px;
  z-index: 2;
  pointer-events: none;
}

.protection-enhanced::after {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  right: -50%;
  bottom: -50%;
  background: repeating-conic-gradient(
    from 0deg,
    transparent 0deg,
    transparent 89deg,
    rgba(255, 255, 255, 0.005) 90deg,
    rgba(255, 255, 255, 0.005) 91deg
  );
  z-index: 3;
  pointer-events: none;
  animation: rotate-protection 60s linear infinite;
}

/* Maximum protection level */
.protection-maximum {
  position: relative;
  overflow: hidden;
  filter: blur(0.1px); /* Subtle blur to defeat pixel-perfect copying */
}

.protection-maximum::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: 
    radial-gradient(circle at 25% 25%, rgba(255, 255, 255, 0.02) 1px, transparent 1px),
    radial-gradient(circle at 75% 75%, rgba(0, 0, 0, 0.01) 1px, transparent 1px),
    linear-gradient(45deg, transparent 49%, rgba(255, 255, 255, 0.008) 50%, transparent 51%);
  background-size: 15px 15px, 25px 25px, 10px 10px;
  z-index: 4;
  pointer-events: none;
  animation: shimmer-protection 10s ease-in-out infinite alternate;
}

.protection-maximum::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: 
    repeating-linear-gradient(
      0deg,
      transparent,
      transparent 1px,
      rgba(255, 255, 255, 0.003) 1px,
      rgba(255, 255, 255, 0.003) 2px
    ),
    repeating-linear-gradient(
      90deg,
      transparent,
      transparent 1px,
      rgba(0, 0, 0, 0.002) 1px,
      rgba(0, 0, 0, 0.002) 2px
    );
  z-index: 5;
  pointer-events: none;
}

/* Animation keyframes */
@keyframes rotate-protection {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

@keyframes shimmer-protection {
  0% { opacity: 0.3; }
  100% { opacity: 0.7; }
}

/* Anti-screenshot protection */
.anti-screenshot {
  position: relative;
}

.anti-screenshot::before {
  content: 'PROTECTED';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  font-size: 2rem;
  font-weight: bold;
  color: rgba(255, 255, 255, 0.1);
  text-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
  z-index: 10;
  pointer-events: none;
  mix-blend-mode: overlay;
}

/* Hide scrollbars in maximum protection to prevent indirect access */
.protection-maximum,
.protection-maximum * {
  scrollbar-width: none; /* Firefox */
  -ms-overflow-style: none; /* Internet Explorer 10+ */
}

.protection-maximum::-webkit-scrollbar,
.protection-maximum *::-webkit-scrollbar {
  display: none; /* WebKit */
}

/* Print protection */
@media print {
  .protected-image,
  .protected-image img,
  .protected-image canvas {
    display: none !important;
    visibility: hidden !important;
    opacity: 0 !important;
  }
  
  .protected-image::before {
    content: 'Image printing is not allowed';
    display: block !important;
    font-size: 14px;
    color: #666;
    text-align: center;
    padding: 20px;
    border: 1px solid #ddd;
  }
}

/* Screen reader protection - hide from screen readers in maximum protection */
.protection-maximum img,
.protection-maximum canvas {
  aria-hidden: true;
}

/* Mobile-specific protection */
@media (max-width: 768px) {
  .protected-image img,
  .protected-image canvas {
    /* Disable long-press context menu on mobile */
    -webkit-touch-callout: none;
    -webkit-user-select: none;
    -khtml-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
    user-select: none;
    
    /* Disable tap highlight */
    -webkit-tap-highlight-color: transparent;
  }
}

/* High contrast mode adjustments */
@media (prefers-contrast: high) {
  .protection-enhanced::before,
  .protection-enhanced::after,
  .protection-maximum::before,
  .protection-maximum::after {
    opacity: 0.1;
  }
}

/* Reduced motion accessibility */
@media (prefers-reduced-motion: reduce) {
  .protection-enhanced::after,
  .protection-maximum::before {
    animation: none;
  }
}

/* DevTools detection styles */
.devtools-detected {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: #000;
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 999999;
  font-size: 2rem;
  text-align: center;
}

.devtools-detected::before {
  content: '⚠️ Developer Tools Detected';
  animation: pulse 1s ease-in-out infinite alternate;
}

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

/* Overlay protection for canvas elements */
.canvas-overlay-protection {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: transparent;
  z-index: 999;
  cursor: default;
}

/* Watermark styles */
.watermark-overlay {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  pointer-events: none;
  z-index: 100;
  background: 
    repeating-linear-gradient(
      45deg,
      transparent,
      transparent 50px,
      rgba(255, 255, 255, 0.05) 50px,
      rgba(255, 255, 255, 0.05) 60px
    );
}

.watermark-text {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%) rotate(-45deg);
  font-size: clamp(1rem, 5vw, 3rem);
  color: rgba(255, 255, 255, 0.1);
  text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.1);
  font-weight: bold;
  white-space: nowrap;
  pointer-events: none;
  user-select: none;
}

/* Loading states for protected images */
.protected-image-loading {
  background: linear-gradient(90deg, #f0f0f0 25%, #e0e0e0 50%, #f0f0f0 75%);
  background-size: 200% 100%;
  animation: loading-shimmer 2s infinite;
}

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

/* Error states */
.protected-image-error {
  border: 2px dashed #dc2626;
  background: #fee2e2;
}

/* Focus management for accessibility */
.protected-image:focus-within {
  outline: 2px solid #3b82f6;
  outline-offset: 2px;
}

/* High DPI display optimizations */
@media (-webkit-min-device-pixel-ratio: 2), (min-resolution: 192dpi) {
  .protection-enhanced::before,
  .protection-maximum::before {
    background-size: 10px 10px, 12px 12px, 5px 5px;
  }
}