/* Neo-Brutalist Design Tokens */
:root {
  /* Core Color Palette: Pale Mint Green Canvas */
  --bg-color: #e2f4ec;         /* Beautiful pale mint green background */
  --card-bg: #ffffff;          /* Pure white cards for high contrast */
  --border-color: #000000;     /* Thich pure black border */
  --text-primary: #0a0a0a;     /* Charcoal/black text */
  --text-muted: #4b5563;       /* Slate gray text for helper text */
  
  /* Saturated retro accents */
  --accent-green: #38bdf8;     /* Override: let's use a gorgeous turquoise-green for main actions */
  --brand-green: #10b981;      /* Bold Emerald Mint */
  --brand-green-light: #a7f3d0;
  --accent-yellow: #facc15;    /* Bright warning yellow */
  --accent-red: #f87171;       /* Danger/Delete red */
  --accent-blue: #60a5fa;      /* Vibrant blue */

  /* Dimensions */
  --border-width: 3px;
  --border-radius: 4px;
  --shadow-offset: 5px;
}

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

body {
  font-family: 'Plus Jakarta Sans', system-ui, -apple-system, sans-serif;
  background-color: var(--bg-color);
  color: var(--text-primary);
  line-height: 1.5;
  padding: 0;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

code, pre, .mono-font, .card-title, .setting-label, .btn, button, input, select, .status-text, .file-name, .progress-percentage, .progress-status, .processing-stats, .gallery-count, .page-badge {
  font-family: 'Space Mono', monospace;
}

/* Custom Scrollbar */
::-webkit-scrollbar {
  width: 12px;
  height: 12px;
}

::-webkit-scrollbar-track {
  background: var(--bg-color);
  border-left: var(--border-width) solid var(--border-color);
}

::-webkit-scrollbar-thumb {
  background-color: #ffffff;
  border: var(--border-width) solid var(--border-color);
  border-radius: var(--border-radius);
}

::-webkit-scrollbar-thumb:hover {
  background-color: var(--accent-yellow);
}

/* Header */
.app-header {
  background-color: #ffffff;
  border-bottom: var(--border-width) solid var(--border-color);
  padding: 12px 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: 0 2px 0px rgba(0,0,0,0.05);
}

.header-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 1.25rem;
  font-weight: 800;
  letter-spacing: -0.5px;
}

.header-logo i {
  color: var(--accent-red);
  font-size: 1.5rem;
  background-color: #ffffff;
  border: 2px solid var(--border-color);
  padding: 4px 6px;
  border-radius: 4px;
  box-shadow: 2px 2px 0px var(--border-color);
}

.header-status {
  display: flex;
  align-items: center;
  gap: 8px;
  background-color: var(--brand-green-light);
  border: 2px solid var(--border-color);
  padding: 4px 10px;
  border-radius: 4px;
  font-size: 0.8rem;
  font-weight: 700;
  box-shadow: 2px 2px 0px var(--border-color);
}

.status-indicator {
  width: 8px;
  height: 8px;
  background-color: var(--brand-green);
  border-radius: 50%;
  display: inline-block;
  animation: pulse 1.8s infinite;
}

@keyframes pulse {
  0% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.7); }
  70% { transform: scale(1); box-shadow: 0 0 0 5px rgba(16, 185, 129, 0); }
  100% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(16, 185, 129, 0); }
}

/* App Layout Grid */
.app-container {
  display: grid;
  grid-template-columns: 380px 1fr;
  gap: 24px;
  padding: 24px;
  flex: 1;
  max-width: 1600px;
  width: 100%;
  margin: 0 auto;
}

/* Control Panel (Left Sidebar) */
.control-panel {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

/* Neo-Brutalist Card */
.neo-card {
  background-color: var(--card-bg);
  border: var(--border-width) solid var(--border-color);
  border-radius: var(--border-radius);
  box-shadow: var(--shadow-offset) var(--shadow-offset) 0px 0px var(--border-color);
  padding: 20px;
  display: flex;
  flex-direction: column;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
  position: relative;
}

.neo-card.disabled {
  opacity: 0.6;
  pointer-events: none;
}

.neo-card.disabled::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(255, 255, 255, 0.3);
  z-index: 10;
  cursor: not-allowed;
}

.card-title {
  font-size: 0.85rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 1px;
  border-bottom: 2px dashed var(--border-color);
  padding-bottom: 8px;
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  gap: 8px;
}

/* Drag & Drop Zone */
.drop-zone {
  border: 3px dashed var(--border-color);
  background-color: #fafafa;
  border-radius: var(--border-radius);
  padding: 30px 15px;
  text-align: center;
  cursor: pointer;
  transition: all 0.15s ease;
  position: relative;
}

.drop-zone:hover, .drop-zone.dragover {
  background-color: var(--brand-green-light);
  border-style: solid;
  transform: translate(-2px, -2px);
  box-shadow: 4px 4px 0px var(--border-color);
}

.file-input-hidden {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  opacity: 0;
  cursor: pointer;
}

.drop-zone-icon {
  font-size: 2.5rem;
  margin-bottom: 12px;
  color: var(--text-primary);
  transition: transform 0.2s ease;
}

.drop-zone:hover .drop-zone-icon {
  transform: translateY(-4px);
}

.drop-zone-primary {
  font-weight: 800;
  font-size: 0.95rem;
  margin-bottom: 4px;
}

.drop-zone-secondary {
  font-size: 0.75rem;
  color: var(--text-muted);
}

/* File Info Box */
.file-info-box {
  display: flex;
  align-items: center;
  gap: 12px;
  background-color: #ffffff;
  border: 2px solid var(--border-color);
  border-radius: var(--border-radius);
  padding: 10px 12px;
  margin-top: 14px;
  box-shadow: 3px 3px 0px var(--border-color);
  position: relative;
}

.file-info-box.hidden {
  display: none;
}

.file-icon {
  font-size: 1.5rem;
  color: var(--accent-red);
}

.file-details {
  flex: 1;
  min-width: 0;
}

.file-name {
  font-weight: 700;
  font-size: 0.8rem;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.file-meta {
  font-size: 0.7rem;
  color: var(--text-muted);
}

.remove-file-btn {
  background: var(--accent-red);
  border: 2px solid var(--border-color);
  width: 24px;
  height: 24px;
  border-radius: 4px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  box-shadow: 1px 1px 0px var(--border-color);
}

.remove-file-btn:hover {
  transform: translate(-1px, -1px);
  box-shadow: 2px 2px 0px var(--border-color);
}

.remove-file-btn:active {
  transform: translate(1px, 1px);
  box-shadow: 0px 0px 0px var(--border-color);
}

/* Settings Form elements */
.setting-group {
  margin-bottom: 18px;
}

.setting-label {
  display: block;
  font-size: 0.75rem;
  font-weight: 800;
  margin-bottom: 6px;
  color: var(--text-primary);
}

.setting-hint {
  font-size: 0.7rem;
  color: var(--text-muted);
  margin-top: 4px;
}

/* Toggle Group for Options (Format & Scale) */
.format-toggle-group, .scale-toggle-group {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 8px;
}

.format-toggle-group input[type="radio"], .scale-toggle-group input[type="radio"] {
  display: none;
}

.format-btn, .scale-btn {
  display: block;
  text-align: center;
  background-color: #ffffff;
  border: 2px solid var(--border-color);
  border-radius: var(--border-radius);
  padding: 8px 4px;
  font-size: 0.75rem;
  font-weight: 700;
  cursor: pointer;
  box-shadow: 2px 2px 0px var(--border-color);
  transition: all 0.15s ease;
  user-select: none;
}

.format-btn:hover, .scale-btn:hover {
  transform: translate(-1px, -1px);
  box-shadow: 3px 3px 0px var(--border-color);
}

.format-toggle-group input[type="radio"]:checked + .format-btn {
  background-color: var(--accent-yellow);
  transform: translate(-1px, -1px);
  box-shadow: 3px 3px 0px var(--border-color);
}

.scale-toggle-group input[type="radio"]:checked + .scale-btn {
  background-color: var(--brand-green-light);
  transform: translate(-1px, -1px);
  box-shadow: 3px 3px 0px var(--border-color);
}

/* Inputs */
.neo-input {
  width: 100%;
  background-color: #ffffff;
  border: 2px solid var(--border-color);
  border-radius: var(--border-radius);
  padding: 10px 12px;
  font-size: 0.8rem;
  outline: none;
  box-shadow: 2px 2px 0px var(--border-color);
  transition: all 0.15s ease;
}

.neo-input:focus {
  transform: translate(-1px, -1px);
  box-shadow: 3px 3px 0px var(--border-color);
}

/* Buttons */
.neo-btn {
  background-color: #ffffff;
  color: var(--text-primary);
  border: 2px solid var(--border-color);
  border-radius: var(--border-radius);
  padding: 6px 12px;
  font-size: 0.75rem;
  font-weight: 700;
  cursor: pointer;
  box-shadow: 2px 2px 0px var(--border-color);
  transition: all 0.1s ease;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.neo-btn:hover {
  transform: translate(-1px, -1px);
  box-shadow: 3px 3px 0px var(--border-color);
}

.neo-btn:active {
  transform: translate(1px, 1px);
  box-shadow: 1px 1px 0px var(--border-color);
}

/* Large Action Button */
.action-btn-huge {
  background-color: var(--brand-green);
  color: #ffffff;
  border: var(--border-width) solid var(--border-color);
  border-radius: var(--border-radius);
  padding: 12px 18px;
  font-size: 0.85rem;
  font-weight: 800;
  letter-spacing: 0.5px;
  cursor: pointer;
  box-shadow: 4px 4px 0px var(--border-color);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  transition: all 0.15s ease;
  width: 100%;
}

.action-btn-huge:hover:not(:disabled) {
  transform: translate(-2px, -2px);
  box-shadow: 6px 6px 0px var(--border-color);
}

.action-btn-huge:active:not(:disabled) {
  transform: translate(2px, 2px);
  box-shadow: 2px 2px 0px var(--border-color);
}

.action-btn-huge:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

/* Progress bar */
.progress-info {
  display: flex;
  justify-content: space-between;
  font-size: 0.75rem;
  font-weight: 700;
  margin-bottom: 6px;
}

.progress-bar-track {
  width: 100%;
  height: 18px;
  background-color: #ffffff;
  border: 2.5px solid var(--border-color);
  border-radius: var(--border-radius);
  box-shadow: 2px 2px 0px var(--border-color);
  overflow: hidden;
  margin-bottom: 8px;
}

.progress-bar-fill {
  height: 100%;
  background-color: var(--brand-green);
  border-right: 2px solid var(--border-color);
  transition: width 0.1s linear;
}

.processing-stats {
  display: flex;
  justify-content: space-between;
  font-size: 0.65rem;
  color: var(--text-muted);
}

/* Memo / System Info Details */
.info-text {
  font-size: 0.75rem;
  line-height: 1.4;
}

.text-accent {
  color: var(--brand-green);
  font-size: 1rem;
  vertical-align: middle;
  margin-right: 4px;
}

/* Right Panel Gallery Container */
.gallery-panel {
  display: flex;
  flex-direction: column;
  gap: 16px;
  height: 100%;
}

/* Gallery Controls */
.gallery-controls {
  background-color: #ffffff;
  border: var(--border-width) solid var(--border-color);
  border-radius: var(--border-radius);
  box-shadow: var(--shadow-offset) var(--shadow-offset) 0px 0px var(--border-color);
  padding: 12px 18px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
}

.gallery-stats {
  font-weight: 700;
  font-size: 0.85rem;
}

.gallery-actions {
  display: flex;
  align-items: center;
  gap: 10px;
}

#download-zip-btn {
  background-color: var(--accent-yellow);
  color: var(--text-primary);
  width: auto;
  padding: 8px 16px;
  font-size: 0.8rem;
  box-shadow: 3px 3px 0px var(--border-color);
}

#download-zip-btn:hover {
  transform: translate(-1px, -1px);
  box-shadow: 4px 4px 0px var(--border-color);
}

#download-zip-btn:active {
  transform: translate(1px, 1px);
  box-shadow: 2px 2px 0px var(--border-color);
}

/* Gallery Grid */
.gallery-grid {
  flex: 1;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 20px;
  min-height: 400px;
  align-content: start;
}

.gallery-grid.empty {
  display: flex;
  justify-content: center;
  align-items: center;
}

/* Empty State Styling */
.empty-state {
  grid-column: 1 / -1;
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 400px;
  width: 100%;
}

.empty-state-card {
  background-color: #ffffff;
  border: var(--border-width) dashed var(--border-color);
  border-radius: var(--border-radius);
  padding: 40px;
  text-align: center;
  max-width: 480px;
  box-shadow: var(--shadow-offset) var(--shadow-offset) 0px 0px rgba(0,0,0,0.05);
}

.empty-illustration {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 16px;
  font-size: 2.5rem;
  margin-bottom: 20px;
  color: var(--text-muted);
}

.empty-pdf-icon {
  color: var(--accent-red);
}

.empty-image-icon {
  color: var(--accent-blue);
}

.empty-arrow-icon {
  font-size: 1.5rem;
  animation: slideRight 1.5s infinite;
}

@keyframes slideRight {
  0% { transform: translateX(-5px); opacity: 0.5; }
  50% { transform: translateX(5px); opacity: 1; }
  100% { transform: translateX(-5px); opacity: 0.5; }
}

.empty-state-card h3 {
  font-size: 1rem;
  font-weight: 800;
  letter-spacing: 0.5px;
  margin-bottom: 8px;
  text-transform: uppercase;
}

.empty-state-card p {
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* Converted Image Card in Gallery */
.page-card {
  background-color: #ffffff;
  border: var(--border-width) solid var(--border-color);
  border-radius: var(--border-radius);
  box-shadow: 4px 4px 0px var(--border-color);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
  position: relative;
}

.page-card:hover {
  transform: translate(-2px, -2px);
  box-shadow: 6px 6px 0px var(--border-color);
}

/* Checkbox overlay */
.card-select-wrapper {
  position: absolute;
  top: 10px;
  left: 10px;
  z-index: 10;
}

.card-checkbox {
  appearance: none;
  -webkit-appearance: none;
  width: 22px;
  height: 22px;
  border: 2px solid var(--border-color);
  border-radius: 4px;
  background-color: #ffffff;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 1px 1px 0px var(--border-color);
  position: relative;
  transition: all 0.1s ease;
}

.card-checkbox:checked {
  background-color: var(--accent-yellow);
}

.card-checkbox:checked::after {
  content: '\f00c';
  font-family: 'Font Awesome 6 Free';
  font-weight: 900;
  font-size: 0.7rem;
  color: var(--text-primary);
}

.card-checkbox:hover {
  transform: scale(1.05);
  box-shadow: 2px 2px 0px var(--border-color);
}

.page-badge {
  position: absolute;
  top: 10px;
  right: 10px;
  background-color: #ffffff;
  border: 2px solid var(--border-color);
  border-radius: 4px;
  padding: 2px 8px;
  font-size: 0.65rem;
  font-weight: 700;
  box-shadow: 2px 2px 0px var(--border-color);
  z-index: 9;
}

/* Card Preview Content */
.card-preview-area {
  aspect-ratio: 1 / 1.414; /* Standard A4 ratio */
  background-color: #f3f4f6;
  border-bottom: 2px solid var(--border-color);
  display: flex;
  justify-content: center;
  align-items: center;
  padding: 10px;
  overflow: hidden;
  cursor: zoom-in;
  position: relative;
}

.card-preview-image {
  max-width: 100%;
  max-height: 100%;
  object-fit: contain;
  box-shadow: 0 4px 6px -1px rgba(0,0,0,0.1);
  border: 1px solid #e5e7eb;
  background: #ffffff;
}

/* Card Action Area */
.card-details-area {
  padding: 12px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  background-color: #ffffff;
  margin-top: auto;
}

.card-resolution {
  font-size: 0.65rem;
  color: var(--text-muted);
  display: flex;
  justify-content: space-between;
}

.card-details-area .neo-btn {
  width: 100%;
  justify-content: center;
  padding: 8px;
  font-size: 0.75rem;
}

/* Image Full View Modal (Bonus clean modal) */
.preview-modal {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.65);
  backdrop-filter: blur(4px);
  z-index: 1000;
  display: flex;
  justify-content: center;
  align-items: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.2s ease;
  padding: 20px;
}

.preview-modal.open {
  opacity: 1;
  pointer-events: auto;
}

.modal-content-wrapper {
  background-color: var(--bg-color);
  border: var(--border-width) solid var(--border-color);
  border-radius: var(--border-radius);
  box-shadow: 8px 8px 0px var(--border-color);
  max-width: 90vw;
  max-height: 90vh;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  position: relative;
  animation: modalScale 0.25s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

@keyframes modalScale {
  from { transform: scale(0.9); }
  to { transform: scale(1); }
}

.modal-header {
  background: #ffffff;
  border-bottom: var(--border-width) solid var(--border-color);
  padding: 10px 16px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.modal-title {
  font-weight: 800;
  font-size: 0.85rem;
}

.modal-close-btn {
  background-color: var(--accent-red);
  border: 2px solid var(--border-color);
  border-radius: 4px;
  width: 26px;
  height: 26px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  box-shadow: 1px 1px 0px var(--border-color);
  font-weight: bold;
}

.modal-close-btn:hover {
  transform: translate(-1px, -1px);
  box-shadow: 2px 2px 0px var(--border-color);
}

.modal-body {
  padding: 16px;
  overflow: auto;
  display: flex;
  justify-content: center;
  align-items: center;
  background-color: #f3f4f6;
  max-height: calc(90vh - 120px);
}

.modal-image {
  max-width: 100%;
  max-height: 70vh;
  object-fit: contain;
  box-shadow: 0 10px 15px -3px rgba(0,0,0,0.1);
  border: 2px solid var(--border-color);
  background: #ffffff;
}

.modal-footer {
  background: #ffffff;
  border-top: var(--border-width) solid var(--border-color);
  padding: 12px 16px;
  display: flex;
  justify-content: flex-end;
  gap: 12px;
}

/* Footer Styling */
.app-footer {
  background-color: #ffffff;
  border-top: var(--border-width) solid var(--border-color);
  padding: 12px 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.7rem;
  color: var(--text-muted);
  margin-top: auto;
}

/* Hide helper class */
.hidden {
  display: none !important;
}

/* Responsive Overrides */
@media (max-width: 900px) {
  .app-container {
    grid-template-columns: 1fr;
  }
  .control-panel {
    max-width: 100%;
  }
}