/* =============================================================================
   PIXELATE IMAGE - CORE COMPONENTS
   ============================================================================= */

/* =============================================================================
   BUTTON COMPONENTS - 按钮组件
   ============================================================================= */

.pi-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: var(--btn-padding-y) var(--btn-padding-x);
  border-radius: var(--btn-border-radius);
  font-size: var(--btn-font-size);
  font-weight: var(--btn-font-weight);
  line-height: 1.5;
  text-decoration: none;
  border: 2px solid transparent;
  cursor: pointer;
  transition: all var(--duration-fast) var(--ease-apple);
  position: relative;
  overflow: hidden;
  white-space: nowrap;
  user-select: none;
  -webkit-user-select: none;
  -moz-user-select: none;
  -ms-user-select: none;
}

.pi-btn:hover {
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

.pi-btn:active {
  transform: translateY(0);
  box-shadow: var(--shadow-sm);
}

.pi-btn:focus {
  outline: none;
  box-shadow: var(--shadow-colored);
}

.pi-btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none;
  box-shadow: none;
}

/* Button Variants */
.pi-btn--primary {
  background: var(--brand-primary);
  color: var(--color-white);
  border-color: var(--brand-primary);
}

.pi-btn--primary:hover {
  background: var(--color-primary-700);
  border-color: var(--color-primary-700);
}

.pi-btn--secondary {
  background: var(--color-white);
  color: var(--brand-primary);
  border-color: var(--color-secondary-200);
}

.pi-btn--secondary:hover {
  background: var(--color-secondary-50);
  border-color: var(--brand-primary);
}

.pi-btn--ghost {
  background: transparent;
  color: var(--brand-primary);
  border-color: transparent;
}

.pi-btn--ghost:hover {
  background: rgba(0, 122, 255, 0.1);
}

.pi-btn--text {
  background: transparent;
  color: var(--brand-primary);
  border-color: transparent;
  padding: 0;
  box-shadow: none;
}

.pi-btn--text:hover {
  background: transparent;
  color: var(--color-primary-700);
  text-decoration: underline;
  box-shadow: none;
}

/* Button Sizes */
.pi-btn--sm {
  padding: 0.5rem 1rem;
  font-size: 0.875rem;
  border-radius: 0.375rem;
}

.pi-btn--lg {
  padding: 1rem 2rem;
  font-size: 1.125rem;
  border-radius: 0.75rem;
}

.pi-btn--xl {
  padding: 1.25rem 2.5rem;
  font-size: 1.25rem;
  border-radius: 1rem;
}

/* Button Special Types */
.pi-btn--icon {
  padding: 0.5rem;
  border-radius: 0.5rem;
  min-width: 2.5rem;
  min-height: 2.5rem;
}

.pi-btn--icon.pi-btn--sm {
  padding: 0.375rem;
  min-width: 2rem;
  min-height: 2rem;
}

.pi-btn--icon.pi-btn--lg {
  padding: 0.75rem;
  min-width: 3rem;
  min-height: 3rem;
}

/* =============================================================================
   CARD COMPONENTS - 卡片组件
   ============================================================================= */

.pi-card {
  background: var(--card-background);
  border: 1px solid var(--card-border-color);
  border-radius: var(--card-border-radius);
  box-shadow: var(--shadow-sm);
  transition: all var(--duration-fast) var(--ease-apple);
  overflow: hidden;
}

.pi-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.pi-card--interactive {
  cursor: pointer;
}

.pi-card--interactive:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-4px);
}

.pi-card--glass {
  background: var(--glass-light);
  backdrop-filter: blur(var(--backdrop-blur-md));
  -webkit-backdrop-filter: blur(var(--backdrop-blur-md));
  border: 1px solid rgba(255, 255, 255, 0.2);
}

.pi-card__body {
  padding: var(--card-padding);
}

.pi-card__header {
  padding: var(--spacing-lg) var(--spacing-xl);
  border-bottom: 1px solid var(--color-secondary-200);
}

.pi-card__footer {
  padding: var(--spacing-lg) var(--spacing-xl);
  border-top: 1px solid var(--color-secondary-200);
  background: var(--color-secondary-50);
}

/* =============================================================================
   FORM COMPONENTS - 表单组件
   ============================================================================= */

.pi-select {
  display: block;
  width: 100%;
  padding: var(--input-padding-y) var(--input-padding-x);
  border: 2px solid var(--input-border-color);
  border-radius: var(--input-border-radius);
  background: var(--input-background);
  font-size: var(--input-font-size);
  font-weight: var(--font-normal);
  line-height: 1.5;
  color: var(--color-secondary-900);
  cursor: pointer;
  transition: all var(--duration-fast) var(--ease-apple);
  appearance: none;
  -webkit-appearance: none;
  -moz-appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 24 24' stroke='currentColor'%3E%3Cpath stroke-linecap='round' stroke-linejoin='round' stroke-width='2' d='M19 9l-7 7-7-7'%3E%3C/path%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 0.75rem center;
  background-size: 1.5rem 1.5rem;
  padding-right: 3rem;
}

.pi-select:hover {
  border-color: var(--brand-primary);
}

.pi-select:focus {
  outline: none;
  border-color: var(--brand-primary);
  box-shadow: var(--shadow-colored);
}

.pi-select:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.pi-input {
  display: block;
  width: 100%;
  padding: var(--input-padding-y) var(--input-padding-x);
  border: 2px solid var(--input-border-color);
  border-radius: var(--input-border-radius);
  background: var(--input-background);
  font-size: var(--input-font-size);
  font-weight: var(--font-normal);
  line-height: 1.5;
  color: var(--color-secondary-900);
  transition: all var(--duration-fast) var(--ease-apple);
}

.pi-input:hover {
  border-color: var(--brand-primary);
}

.pi-input:focus {
  outline: none;
  border-color: var(--brand-primary);
  box-shadow: var(--shadow-colored);
}

.pi-input--error {
  border-color: var(--brand-error);
}

.pi-input--error:focus {
  box-shadow: 0 0 0 3px rgba(239, 68, 68, 0.1);
}

.pi-range {
  width: 100%;
  height: 6px;
  border-radius: 3px;
  background: var(--color-secondary-200);
  outline: none;
  -webkit-appearance: none;
  appearance: none;
  cursor: pointer;
}

.pi-range::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: var(--brand-primary);
  cursor: pointer;
  box-shadow: var(--shadow-sm);
  transition: all var(--duration-fast) var(--ease-apple);
}

.pi-range::-webkit-slider-thumb:hover {
  transform: scale(1.1);
  box-shadow: var(--shadow-md);
}

.pi-range::-moz-range-thumb {
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: var(--brand-primary);
  cursor: pointer;
  border: none;
  box-shadow: var(--shadow-sm);
  transition: all var(--duration-fast) var(--ease-apple);
}

.pi-range::-moz-range-thumb:hover {
  transform: scale(1.1);
  box-shadow: var(--shadow-md);
}

.pi-range:focus {
  outline: none;
}

.pi-range:focus::-webkit-slider-thumb {
  box-shadow: var(--shadow-colored);
}

.pi-range:focus::-moz-range-thumb {
  box-shadow: var(--shadow-colored);
}

/* =============================================================================
   UPLOAD COMPONENTS - 上传组件
   ============================================================================= */

.pi-upload-area {
  border: 2px dashed var(--color-secondary-300);
  border-radius: var(--radius-lg);
  padding: var(--spacing-3xl) var(--spacing-xl);
  text-align: center;
  transition: all var(--duration-fast) var(--ease-apple);
  background: var(--color-secondary-50);
  cursor: pointer;
  position: relative;
}

.pi-upload-area:hover {
  border-color: var(--brand-primary);
  background: var(--color-primary-50);
}

.pi-upload-area.drag-over {
  border-color: var(--brand-primary);
  background: var(--color-primary-100);
  transform: scale(1.02);
}

.pi-upload-area__content {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-lg);
}

.pi-upload-area__icon {
  width: 4rem;
  height: 4rem;
  color: var(--color-secondary-400);
  transition: color var(--duration-fast) var(--ease-apple);
}

.pi-upload-area:hover .pi-upload-area__icon {
  color: var(--brand-primary);
}

.pi-upload-area__title {
  font-size: var(--text-xl);
  font-weight: var(--font-semibold);
  color: var(--color-secondary-900);
  margin: 0;
}

.pi-upload-area__description {
  font-size: var(--text-base);
  color: var(--color-secondary-600);
  margin: 0;
}

.pi-upload-area__button {
  margin-top: var(--spacing-lg);
}

/* =============================================================================
   NAVIGATION COMPONENTS - 导航组件
   ============================================================================= */

.pi-nav-link {
  color: var(--color-secondary-700);
  text-decoration: none;
  font-weight: var(--font-medium);
  transition: color var(--duration-fast) var(--ease-apple);
  padding: var(--nav-padding-y) var(--nav-padding-x);
  border-radius: var(--nav-border-radius);
  display: inline-block;
}

.pi-nav-link:hover {
  color: var(--brand-primary);
  background: rgba(0, 122, 255, 0.1);
}

.pi-nav-link:active {
  color: var(--color-primary-700);
}

/* =============================================================================
   ANIMATION COMPONENTS - 动画组件
   ============================================================================= */

.pi-animate--fade-in-down {
  animation: pi-fade-in-down 0.8s var(--ease-apple-out) forwards;
}

.pi-animate--fade-in-up {
  animation: pi-fade-in-up 0.8s var(--ease-apple-out) forwards;
}

.pi-animate--fade-in {
  animation: pi-fade-in 0.6s var(--ease-apple-out) forwards;
}

.pi-animate--slide-in-left {
  animation: pi-slide-in-left 0.6s var(--ease-apple-out) forwards;
}

.pi-animate--slide-in-right {
  animation: pi-slide-in-right 0.6s var(--ease-apple-out) forwards;
}

.pi-animate--scale-in {
  animation: pi-scale-in 0.5s var(--ease-apple-out) forwards;
}

.pi-animate--bounce {
  animation: pi-bounce 1s var(--ease-apple) infinite;
}

.pi-animate--pulse {
  animation: pi-pulse 2s var(--ease-apple) infinite;
}

.pi-animate--glow {
  animation: pi-glow 2s var(--ease-apple) infinite alternate;
}

/* =============================================================================
   UPLOAD INFO COMPONENT - 上传信息组件
   ============================================================================= */
.pi-upload-info {
  background: linear-gradient(135deg, rgba(59, 130, 246, 0.1) 0%, rgba(147, 51, 234, 0.1) 100%);
  border: 1px solid rgba(59, 130, 246, 0.2);
  border-radius: 12px;
  padding: 16px;
  margin-top: 16px;
  backdrop-filter: blur(10px);
}

.pi-upload-info__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 12px;
}

.pi-upload-info__details {
  flex: 1;
}

.pi-upload-info__name {
  font-weight: 600;
  color: #1f2937;
  margin: 0 0 4px 0;
  font-size: 14px;
}

.pi-upload-info__meta {
  color: #6b7280;
  font-size: 12px;
  margin: 0;
}

.pi-upload-info__icon {
  width: 32px;
  height: 32px;
  background: linear-gradient(135deg, #3b82f6 0%, #8b5cf6 100%);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.pi-upload-info__icon-svg {
  width: 16px;
  height: 16px;
  color: white;
}

.pi-upload-info__progress {
  margin-top: 8px;
}

.pi-upload-progress {
  width: 100%;
  height: 8px;
  background: rgba(59, 130, 246, 0.1);
  border-radius: 4px;
  overflow: hidden;
}

.pi-upload-progress__bar {
  height: 100%;
  background: linear-gradient(90deg, #3b82f6 0%, #8b5cf6 100%);
  border-radius: 4px;
  transition: width 0.3s ease;
}

.pi-upload-progress__text {
  font-size: 11px;
  color: #6b7280;
  margin-top: 4px;
  text-align: center;
}

/* Upload Loading Component */
.pi-upload-loading {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 48px 24px;
  text-align: center;
}

.pi-upload-loading__spinner {
  position: relative;
  margin-bottom: 24px;
}

.pi-upload-loading__content {
  margin-bottom: 16px;
}

.pi-upload-loading__title {
  font-size: 18px;
  font-weight: 600;
  color: #1f2937;
  margin: 0 0 8px 0;
}

.pi-upload-loading__subtitle {
  font-size: 14px;
  color: #6b7280;
  margin: 0;
}

.pi-upload-loading__dots {
  display: flex;
  gap: 8px;
}

.pi-upload-loading__dot {
  width: 8px;
  height: 8px;
  background: linear-gradient(135deg, #3b82f6 0%, #8b5cf6 100%);
  border-radius: 50%;
  animation: pi-bounce-dot 1.4s ease-in-out infinite both;
}

.pi-upload-loading__dot:nth-child(1) {
  animation-delay: -0.32s;
}

.pi-upload-loading__dot:nth-child(2) {
  animation-delay: -0.16s;
}

/* Performance Metrics Component */
.pi-performance-metrics {
  margin-top: 16px;
  padding: 12px;
  background: linear-gradient(135deg, rgba(34, 197, 94, 0.1) 0%, rgba(16, 185, 129, 0.1) 100%);
  border: 1px solid rgba(34, 197, 94, 0.2);
  border-radius: 8px;
  font-size: 12px;
  color: #065f46;
}

.pi-performance-metrics__content {
  display: flex;
  align-items: center;
  gap: 8px;
}

.pi-performance-metrics__icon {
  width: 16px;
  height: 16px;
  color: #059669;
  flex-shrink: 0;
}

/* Debug Stats Component */
.pi-debug-stats {
  position: fixed;
  top: 16px;
  left: 16px;
  z-index: 9999;
  background: rgba(17, 24, 39, 0.95);
  border: 1px solid rgba(75, 85, 99, 0.3);
  border-radius: 8px;
  padding: 16px;
  color: #f3f4f6;
  font-family: 'Monaco', 'Menlo', 'Ubuntu Mono', monospace;
  font-size: 11px;
  line-height: 1.4;
  backdrop-filter: blur(10px);
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.3);
  min-width: 280px;
}

.pi-debug-stats__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 12px;
  padding-bottom: 8px;
  border-bottom: 1px solid rgba(75, 85, 99, 0.3);
}

.pi-debug-stats__title {
  color: #10b981;
  font-weight: 600;
  margin: 0;
  font-size: 12px;
}

.pi-debug-stats__close {
  background: none;
  border: none;
  color: #9ca3af;
  cursor: pointer;
  font-size: 16px;
  padding: 0;
  width: 20px;
  height: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 4px;
  transition: all 0.2s ease;
}

.pi-debug-stats__close:hover {
  color: #f3f4f6;
  background: rgba(75, 85, 99, 0.2);
}

.pi-debug-stats__content {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.pi-debug-stats__content div {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

/* Spinner Components */
.pi-spinner {
  border: 3px solid rgba(59, 130, 246, 0.2);
  border-top-color: #3b82f6;
  border-radius: 50%;
  animation: pi-spin 1s linear infinite;
}

.pi-spinner--lg {
  width: 48px;
  height: 48px;
  border-width: 4px;
}

.pi-spinner--ping {
  position: absolute;
  top: 0;
  left: 0;
  width: 48px;
  height: 48px;
  border: 4px solid rgba(59, 130, 246, 0.2);
  border-radius: 50%;
  animation: pi-ping 2s cubic-bezier(0, 0, 0.2, 1) infinite;
}

/* Notification Component */
.pi-notification {
  position: fixed;
  top: 20px;
  right: 20px;
  padding: 16px 20px;
  border-radius: 12px;
  background: white;
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
  z-index: 9999;
  transform: translateX(100%);
  transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  border-left: 4px solid #3b82f6;
  font-size: 14px;
  font-weight: 500;
  color: #1f2937;
  max-width: 320px;
  backdrop-filter: blur(10px);
}

.pi-notification--visible {
  transform: translateX(0);
}

.pi-notification--info {
  border-left-color: #3b82f6;
  background: linear-gradient(135deg, rgba(59, 130, 246, 0.05) 0%, rgba(147, 51, 234, 0.05) 100%);
}

.pi-notification--success {
  border-left-color: #10b981;
  background: linear-gradient(135deg, rgba(16, 185, 129, 0.05) 0%, rgba(34, 197, 94, 0.05) 100%);
}

.pi-notification--warning {
  border-left-color: #f59e0b;
  background: linear-gradient(135deg, rgba(245, 158, 11, 0.05) 0%, rgba(251, 191, 36, 0.05) 100%);
}

.pi-notification--error {
  border-left-color: #ef4444;
  background: linear-gradient(135deg, rgba(239, 68, 68, 0.05) 0%, rgba(248, 113, 113, 0.05) 100%);
}

/* =============================================================================
   ANIMATION KEYFRAMES - 动画关键帧
   ============================================================================= */

@keyframes pi-fade-in-down {
  0% {
    opacity: 0;
    transform: translateY(-20px);
  }
  100% {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes pi-fade-in-up {
  0% {
    opacity: 0;
    transform: translateY(20px);
  }
  100% {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes pi-fade-in {
  0% {
    opacity: 0;
  }
  100% {
    opacity: 1;
  }
}

@keyframes pi-slide-in-left {
  0% {
    opacity: 0;
    transform: translateX(-30px);
  }
  100% {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes pi-slide-in-right {
  0% {
    opacity: 0;
    transform: translateX(30px);
  }
  100% {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes pi-scale-in {
  0% {
    opacity: 0;
    transform: scale(0.8);
  }
  100% {
    opacity: 1;
    transform: scale(1);
  }
}

@keyframes pi-bounce {
  0%, 20%, 50%, 80%, 100% {
    transform: translateY(0);
  }
  40% {
    transform: translateY(-10px);
  }
  60% {
    transform: translateY(-5px);
  }
}

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

@keyframes pi-glow {
  0% {
    box-shadow: 0 0 5px rgba(0, 122, 255, 0.3);
  }
  100% {
    box-shadow: 0 0 20px rgba(0, 122, 255, 0.6);
  }
}

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

@keyframes pi-ping {
  75%, 100% {
    transform: scale(2);
    opacity: 0;
  }
}

@keyframes pi-bounce-dot {
  0%, 80%, 100% {
    transform: scale(0);
    animation-timing-function: cubic-bezier(0.215, 0.61, 0.355, 1);
  }
  40% {
    transform: scale(1);
    animation-timing-function: cubic-bezier(0.755, 0.05, 0.855, 0.06);
  }
}

/* Mobile Menu Enhancement */
.pi-nav-mobile--open {
  display: block !important;
  animation: pi-slide-down 0.3s ease-out;
}

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

/* Upload Area Footer */
.pi-upload-area__footer {
  margin-top: 16px;
  text-align: center;
}

.pi-upload-area__info {
  font-size: 12px;
  color: #6b7280;
  margin: 0;
  line-height: 1.4;
}

/* Range Slider Enhancement */
.pi-range-value {
  display: inline-block;
  min-width: 30px;
  text-align: center;
  font-weight: 600;
  color: #3b82f6;
}

/* Responsive adjustments */
@media (max-width: 768px) {
  .pi-upload-info {
    padding: 12px;
  }
  
  .pi-upload-loading {
    padding: 32px 16px;
  }
  
  .pi-notification {
    right: 16px;
    left: 16px;
    max-width: none;
  }
  
  .pi-debug-stats {
    left: 16px;
    right: 16px;
    min-width: auto;
  }
}

/* High contrast mode support */
@media (prefers-contrast: high) {
  .pi-upload-info {
    border-width: 2px;
  }
  
  .pi-notification {
    border-width: 2px;
  }
}

/* Reduced motion support */
@media (prefers-reduced-motion: reduce) {
  .pi-upload-loading__dot,
  .pi-spinner,
  .pi-spinner--ping,
  .pi-notification {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}