/**
 * PDFEditor.pk — Unified Upload Zone Component
 * Shared upload zone styles for all 3 stacks (PHP, Node.js, Python)
 */

/* ========================================
   Upload Zone Container
   ======================================== */
.uz-container {
  position: relative;
  width: 100%;
  max-width: 680px;
  margin: 0 auto;
}

/* ========================================
   Drop Zone
   ======================================== */
.uz-dropzone {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 260px;
  padding: var(--space-8) var(--space-6);
  border: 2px dashed var(--border-secondary, #D1D5DB);
  border-radius: var(--radius-xl, 12px);
  background: var(--bg-secondary, #F9FAFB);
  cursor: pointer;
  transition: all 0.25s ease;
  text-align: center;
  outline: none;
}

.uz-dropzone:hover {
  border-color: var(--brand-primary, #2563EB);
  background: var(--brand-primary-light, #DBEAFE);
}

/* Drag-over state */
.uz-dropzone.uz-drag-over {
  border-color: var(--brand-primary, #2563EB);
  border-style: solid;
  background: var(--brand-primary-light, #DBEAFE);
  transform: scale(1.01);
  box-shadow: 0 0 0 4px rgba(37, 99, 235, 0.15);
}

/* Disabled / processing state */
.uz-dropzone.uz-disabled {
  pointer-events: none;
  opacity: 0.55;
}

/* Hidden file input */
.uz-dropzone input[type="file"] {
  display: none !important;
}

/* ========================================
   Upload Icon (SVG or font icon)
   ======================================== */
.uz-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 64px;
  height: 64px;
  margin-bottom: var(--space-4, 1rem);
  border-radius: 50%;
  background: var(--brand-primary-light, #DBEAFE);
  color: var(--brand-primary, #2563EB);
  transition: all 0.25s ease;
}

.uz-dropzone:hover .uz-icon,
.uz-dropzone.uz-drag-over .uz-icon {
  background: var(--brand-primary, #2563EB);
  color: #fff;
  transform: translateY(-2px);
}

.uz-icon svg {
  width: 28px;
  height: 28px;
}

/* ========================================
   Upload Text
   ======================================== */
.uz-text-primary {
  font-family: var(--font-sans, 'Inter', sans-serif);
  font-size: var(--text-lg, 1.125rem);
  font-weight: 600;
  color: var(--text-primary, #111827);
  margin: 0 0 var(--space-2, 0.5rem) 0;
}

.uz-text-secondary {
  font-family: var(--font-sans, 'Inter', sans-serif);
  font-size: var(--text-sm, 0.875rem);
  color: var(--text-tertiary, #6B7280);
  margin: 0;
}

.uz-text-secondary .uz-browse-link {
  color: var(--brand-primary, #2563EB);
  font-weight: 500;
  text-decoration: underline;
  cursor: pointer;
}

.uz-text-secondary .uz-browse-link:hover {
  color: var(--brand-primary-hover, #1D4ED8);
}

.uz-accepted-types {
  display: inline-block;
  margin-top: var(--space-2, 0.5rem);
  padding: 2px 10px;
  font-size: var(--text-xs, 0.75rem);
  color: var(--text-tertiary, #6B7280);
  background: var(--bg-tertiary, #F3F4F6);
  border-radius: var(--radius-full, 9999px);
}

/* ========================================
   Validation Error
   ======================================== */
.uz-error {
  display: none;
  margin-top: var(--space-3, 0.75rem);
  padding: var(--space-3, 0.75rem) var(--space-4, 1rem);
  font-size: var(--text-sm, 0.875rem);
  color: var(--color-error, #EF4444);
  background: var(--color-error-light, #FEE2E2);
  border-radius: var(--radius-lg, 8px);
  text-align: center;
}

.uz-error.uz-visible {
  display: block;
  animation: uz-shake 0.4s ease;
}

@keyframes uz-shake {
  0%, 100% { transform: translateX(0); }
  20% { transform: translateX(-6px); }
  40% { transform: translateX(6px); }
  60% { transform: translateX(-4px); }
  80% { transform: translateX(4px); }
}

/* ========================================
   File Preview Area
   ======================================== */
.uz-file-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-3, 0.75rem);
  margin-top: var(--space-4, 1rem);
  width: 100%;
}

.uz-file-card {
  display: flex;
  align-items: center;
  gap: var(--space-3, 0.75rem);
  padding: var(--space-3, 0.75rem) var(--space-4, 1rem);
  background: var(--bg-primary, #FFFFFF);
  border: 1px solid var(--border-primary, #E5E7EB);
  border-radius: var(--radius-lg, 8px);
  transition: all 0.2s ease;
  animation: uz-slide-in 0.3s ease;
}

@keyframes uz-slide-in {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

.uz-file-card:hover {
  border-color: var(--border-secondary, #D1D5DB);
  box-shadow: var(--shadow-sm, 0 1px 2px rgba(0,0,0,0.05));
}

/* Thumbnail */
.uz-file-thumb {
  flex-shrink: 0;
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-md, 6px);
  overflow: hidden;
  background: var(--bg-tertiary, #F3F4F6);
}

.uz-file-thumb img,
.uz-file-thumb canvas {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* Type icon fallback */
.uz-file-thumb .uz-type-icon {
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--brand-primary, #2563EB);
  text-transform: uppercase;
  letter-spacing: -0.5px;
}

.uz-type-icon-pdf { color: #EF4444 !important; }
.uz-type-icon-doc { color: #2563EB !important; }
.uz-type-icon-img { color: #10B981 !important; }
.uz-type-icon-xls { color: #059669 !important; }

/* File info */
.uz-file-info {
  flex: 1;
  min-width: 0;
}

.uz-file-name {
  font-family: var(--font-sans, 'Inter', sans-serif);
  font-size: var(--text-sm, 0.875rem);
  font-weight: 500;
  color: var(--text-primary, #111827);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  margin: 0;
}

.uz-file-meta {
  font-family: var(--font-sans, 'Inter', sans-serif);
  font-size: var(--text-xs, 0.75rem);
  color: var(--text-tertiary, #6B7280);
  margin: 2px 0 0 0;
}

/* Remove button */
.uz-file-remove {
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 30px;
  height: 30px;
  border: none;
  background: transparent;
  color: var(--text-tertiary, #6B7280);
  border-radius: var(--radius-md, 6px);
  cursor: pointer;
  transition: all 0.15s ease;
  padding: 0;
  line-height: 1;
}

.uz-file-remove:hover {
  background: var(--color-error-light, #FEE2E2);
  color: var(--color-error, #EF4444);
}

.uz-file-remove svg {
  width: 16px;
  height: 16px;
}

/* Clear all button */
.uz-clear-all {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2, 0.5rem);
  margin-top: var(--space-2, 0.5rem);
  padding: var(--space-2, 0.5rem) var(--space-3, 0.75rem);
  font-family: var(--font-sans, 'Inter', sans-serif);
  font-size: var(--text-xs, 0.75rem);
  font-weight: 500;
  color: var(--color-error, #EF4444);
  background: transparent;
  border: 1px solid var(--color-error-light, #FEE2E2);
  border-radius: var(--radius-md, 6px);
  cursor: pointer;
  transition: all 0.15s ease;
}

.uz-clear-all:hover {
  background: var(--color-error-light, #FEE2E2);
}

/* ========================================
   Compression / Size Result Bar
   ======================================== */
.uz-size-result {
  display: none;
  margin-top: var(--space-4, 1rem);
  padding: var(--space-4, 1rem) var(--space-5, 1.25rem);
  background: var(--color-success-light, #D1FAE5);
  border: 1px solid var(--color-success, #10B981);
  border-radius: var(--radius-lg, 8px);
  text-align: center;
}

.uz-size-result.uz-visible {
  display: block;
  animation: uz-slide-in 0.3s ease;
}

.uz-size-result-text {
  font-family: var(--font-sans, 'Inter', sans-serif);
  font-size: var(--text-sm, 0.875rem);
  font-weight: 600;
  color: var(--text-primary, #111827);
  margin: 0 0 var(--space-2, 0.5rem) 0;
}

.uz-size-result-text .uz-size-original {
  color: var(--text-tertiary, #6B7280);
  text-decoration: line-through;
}

.uz-size-result-text .uz-size-arrow {
  display: inline-block;
  margin: 0 var(--space-2, 0.5rem);
  color: var(--text-tertiary, #6B7280);
}

.uz-size-result-text .uz-size-new {
  color: var(--color-success, #10B981);
}

.uz-size-result-text .uz-size-percent {
  display: inline-block;
  margin-left: var(--space-2, 0.5rem);
  padding: 1px 8px;
  font-size: var(--text-xs, 0.75rem);
  color: #fff;
  background: var(--color-success, #10B981);
  border-radius: var(--radius-full, 9999px);
}

/* Visual bar */
.uz-size-bar {
  position: relative;
  width: 100%;
  height: 8px;
  background: var(--border-primary, #E5E7EB);
  border-radius: var(--radius-full, 9999px);
  overflow: hidden;
  margin-top: var(--space-2, 0.5rem);
}

.uz-size-bar-fill {
  height: 100%;
  background: var(--color-success, #10B981);
  border-radius: var(--radius-full, 9999px);
  transition: width 0.6s ease;
}

/* ========================================
   Keyboard Shortcut Hints
   ======================================== */
.uz-shortcuts {
  display: flex;
  justify-content: center;
  gap: var(--space-4, 1rem);
  margin-top: var(--space-3, 0.75rem);
  flex-wrap: wrap;
}

.uz-shortcut {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-family: var(--font-sans, 'Inter', sans-serif);
  font-size: 11px;
  color: var(--text-disabled, #9CA3AF);
}

.uz-shortcut kbd {
  display: inline-block;
  padding: 1px 5px;
  font-family: var(--font-mono, 'Fira Code', monospace);
  font-size: 10px;
  color: var(--text-tertiary, #6B7280);
  background: var(--bg-tertiary, #F3F4F6);
  border: 1px solid var(--border-primary, #E5E7EB);
  border-radius: 3px;
  line-height: 1.4;
}

/* ========================================
   Dark Mode Overrides
   ======================================== */
.dark .uz-dropzone,
[data-theme="dark"] .uz-dropzone {
  background: var(--dark-surface, #1e293b);
  border-color: var(--dark-border, #334155);
}

.dark .uz-dropzone:hover,
[data-theme="dark"] .uz-dropzone:hover,
.dark .uz-dropzone.uz-drag-over,
[data-theme="dark"] .uz-dropzone.uz-drag-over {
  border-color: var(--brand-primary, #2563EB);
  background: rgba(37, 99, 235, 0.1);
}

.dark .uz-icon,
[data-theme="dark"] .uz-icon {
  background: rgba(37, 99, 235, 0.15);
}

.dark .uz-file-card,
[data-theme="dark"] .uz-file-card {
  background: var(--dark-surface, #1e293b);
  border-color: var(--dark-border, #334155);
}

.dark .uz-file-thumb,
[data-theme="dark"] .uz-file-thumb {
  background: var(--dark-surface-hover, #334155);
}

.dark .uz-error,
[data-theme="dark"] .uz-error {
  background: rgba(239, 68, 68, 0.15);
}

.dark .uz-size-result,
[data-theme="dark"] .uz-size-result {
  background: rgba(16, 185, 129, 0.1);
  border-color: rgba(16, 185, 129, 0.3);
}

.dark .uz-accepted-types,
[data-theme="dark"] .uz-accepted-types {
  background: var(--dark-surface-hover, #334155);
  color: var(--dark-text-secondary, #94a3b8);
}

.dark .uz-shortcut kbd,
[data-theme="dark"] .uz-shortcut kbd {
  background: var(--dark-surface-hover, #334155);
  border-color: var(--dark-border, #334155);
  color: var(--dark-text-secondary, #94a3b8);
}

/* ========================================
   Responsive
   ======================================== */
@media (max-width: 640px) {
  .uz-dropzone {
    min-height: 200px;
    padding: var(--space-6, 1.5rem) var(--space-4, 1rem);
  }

  .uz-icon {
    width: 52px;
    height: 52px;
  }

  .uz-icon svg {
    width: 22px;
    height: 22px;
  }

  .uz-text-primary {
    font-size: var(--text-base, 1rem);
  }

  .uz-shortcuts {
    display: none;
  }

  .uz-file-card {
    padding: var(--space-2, 0.5rem) var(--space-3, 0.75rem);
  }

  .uz-file-thumb {
    width: 40px;
    height: 40px;
  }
}

@media (max-width: 380px) {
  .uz-dropzone {
    min-height: 170px;
    padding: var(--space-4, 1rem);
  }

  .uz-text-secondary {
    font-size: var(--text-xs, 0.75rem);
  }
}