/* CodingMation Image to PDF - Production Styles */
/* Compiled utility-first CSS inspired by Tailwind */

:root {
  --color-primary: #2563eb;
  --color-primary-hover: #1d4ed8;
  --color-primary-light: #dbeafe;
  --color-success: #16a34a;
  --color-danger: #dc2626;
  --color-gray-50: #f9fafb;
  --color-gray-100: #f3f4f6;
  --color-gray-200: #e5e7eb;
  --color-gray-300: #d1d5db;
  --color-gray-400: #9ca3af;
  --color-gray-500: #6b7280;
  --color-gray-600: #4b5563;
  --color-gray-700: #374151;
  --color-gray-800: #1f2937;
  --color-gray-900: #111827;
  --radius-xl: 0.75rem;
  --radius-2xl: 1rem;
  --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
  --shadow: 0 1px 3px 0 rgb(0 0 0 / 0.1), 0 1px 2px -1px rgb(0 0 0 / 0.1);
  --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
  --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
  font-family: ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  background-color: var(--color-gray-50);
  color: var(--color-gray-800);
  line-height: 1.5;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}

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

button, input, select { font: inherit; }

/* Layout */
.container {
  width: 100%;
  max-width: 72rem;
  margin-left: auto;
  margin-right: auto;
  padding-left: 1rem;
  padding-right: 1rem;
}

@media (min-width: 640px) {
  .container { padding-left: 1.5rem; padding-right: 1.5rem; }
}

/* Header */
.site-header {
  background: white;
  border-bottom: 1px solid var(--color-gray-200);
  position: sticky;
  top: 0;
  z-index: 50;
  box-shadow: var(--shadow-sm);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 3.5rem;
  gap: 1rem;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  text-decoration: none;
  color: inherit;
}

.brand-logo {
  width: 2rem;
  height: 2rem;
  background: linear-gradient(135deg, #2563eb, #1d4ed8);
  border-radius: 0.5rem;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-weight: 700;
  font-size: 0.875rem;
}

.brand-text {
  display: flex;
  flex-direction: column;
}

.brand-name {
  font-weight: 700;
  font-size: 1rem;
  color: var(--color-gray-900);
  line-height: 1.2;
}

.brand-tool {
  font-size: 0.75rem;
  color: var(--color-gray-500);
  line-height: 1.2;
}

.offline-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.375rem;
  background: #ecfdf5;
  color: #065f46;
  font-size: 0.75rem;
  font-weight: 600;
  padding: 0.25rem 0.625rem;
  border-radius: 9999px;
  border: 1px solid #a7f3d0;
}

.pdf-tools-link {
  font-size: 0.875rem;
  color: var(--color-gray-600);
  text-decoration: none;
  padding: 0.375rem 0.75rem;
  border-radius: 0.5rem;
  border: 1px solid var(--color-gray-200);
  transition: all 0.15s;
}

.pdf-tools-link:hover {
  background: var(--color-gray-50);
  color: var(--color-gray-900);
}

/* Hero */
.hero {
  padding: 1.5rem 0 1rem;
  text-align: center;
}

.hero h1 {
  font-size: 1.75rem;
  font-weight: 800;
  color: var(--color-gray-900);
  letter-spacing: -0.025em;
  margin-bottom: 0.5rem;
}

@media (min-width: 640px) {
  .hero h1 { font-size: 2rem; }
}

.hero-sub {
  color: var(--color-gray-600);
  font-size: 1rem;
  margin-bottom: 0.75rem;
  max-width: 32rem;
  margin-left: auto;
  margin-right: auto;
}

.hero-privacy {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.875rem;
  color: var(--color-gray-500);
}

/* Main Card */
.main-card {
  background: white;
  border-radius: var(--radius-2xl);
  border: 1px solid var(--color-gray-200);
  box-shadow: var(--shadow-lg);
  overflow: hidden;
  margin-bottom: 2rem;
}

.card-section {
  padding: 1.25rem 1.5rem;
  border-bottom: 1px solid var(--color-gray-100);
}

.card-section:last-child {
  border-bottom: none;
}

@media (min-width: 640px) {
  .card-section { padding: 1.5rem 1.75rem; }
}

.section-title {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--color-gray-900);
  margin-bottom: 0.75rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
}

.section-title span.meta {
  font-weight: 400;
  color: var(--color-gray-500);
  font-size: 0.8125rem;
}

/* Upload / Empty State */
.upload-zone {
  border: 2px dashed var(--color-gray-300);
  border-radius: var(--radius-xl);
  padding: 2.5rem 1.5rem;
  text-align: center;
  background: var(--color-gray-50);
  transition: all 0.2s;
  cursor: pointer;
}

.upload-zone:hover,
.upload-zone.drag-over {
  border-color: var(--color-primary);
  background: var(--color-primary-light);
}

.upload-icon {
  width: 3.5rem;
  height: 3.5rem;
  margin: 0 auto 1rem;
  color: var(--color-gray-400);
}

.upload-zone h3 {
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--color-gray-800);
  margin-bottom: 0.375rem;
}

.upload-zone p {
  color: var(--color-gray-500);
  font-size: 0.875rem;
  margin-bottom: 1.25rem;
}

.upload-hint {
  font-size: 0.75rem;
  color: var(--color-gray-400);
  margin-top: 0.75rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  font-weight: 600;
  font-size: 0.875rem;
  padding: 0.625rem 1.25rem;
  border-radius: 0.625rem;
  border: none;
  cursor: pointer;
  transition: all 0.15s;
  text-decoration: none;
  line-height: 1.25;
}

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

.btn-primary {
  background: var(--color-primary);
  color: white;
  box-shadow: var(--shadow-sm);
}

.btn-primary:hover:not(:disabled) {
  background: var(--color-primary-hover);
}

.btn-secondary {
  background: white;
  color: var(--color-gray-700);
  border: 1px solid var(--color-gray-300);
}

.btn-secondary:hover:not(:disabled) {
  background: var(--color-gray-50);
  border-color: var(--color-gray-400);
}

.btn-danger {
  background: white;
  color: var(--color-danger);
  border: 1px solid #fecaca;
}

.btn-danger:hover:not(:disabled) {
  background: #fef2f2;
}

.btn-sm {
  padding: 0.375rem 0.75rem;
  font-size: 0.8125rem;
}

.btn-lg {
  padding: 0.875rem 1.75rem;
  font-size: 1rem;
}

.btn-block {
  width: 100%;
}

/* Image Grid */
.images-header {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  margin-bottom: 1rem;
}

.image-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0.75rem;
}

@media (min-width: 640px) {
  .image-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 1rem;
  }
}

@media (min-width: 1024px) {
  .image-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}

.image-card {
  background: white;
  border: 1px solid var(--color-gray-200);
  border-radius: var(--radius-xl);
  overflow: hidden;
  transition: box-shadow 0.15s, border-color 0.15s;
  position: relative;
  user-select: none;
}

.image-card:hover {
  border-color: var(--color-gray-300);
  box-shadow: var(--shadow-md);
}

.image-card.dragging {
  opacity: 0.5;
  border-color: var(--color-primary);
}

.image-card.drag-over {
  border-color: var(--color-primary);
  background: var(--color-primary-light);
}

.image-thumb-wrap {
  position: relative;
  aspect-ratio: 4/3;
  background: var(--color-gray-100);
  overflow: hidden;
}

.image-thumb {
  width: 100%;
  height: 100%;
  object-fit: contain;
  transition: transform 0.2s;
}

.image-card .drag-handle {
  position: absolute;
  top: 0.375rem;
  left: 0.375rem;
  background: rgba(0,0,0,0.55);
  color: white;
  border-radius: 0.375rem;
  padding: 0.25rem 0.375rem;
  font-size: 0.7rem;
  cursor: grab;
  z-index: 5;
  display: flex;
  align-items: center;
  gap: 0.2rem;
}

.image-card .drag-handle:active { cursor: grabbing; }

.page-badge {
  position: absolute;
  top: 0.375rem;
  right: 0.375rem;
  background: rgba(0,0,0,0.65);
  color: white;
  font-size: 0.7rem;
  font-weight: 600;
  padding: 0.2rem 0.45rem;
  border-radius: 0.375rem;
  z-index: 5;
}

.image-info {
  padding: 0.625rem 0.75rem;
}

.image-filename {
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--color-gray-800);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  margin-bottom: 0.2rem;
}

.image-meta {
  font-size: 0.6875rem;
  color: var(--color-gray-500);
  margin-bottom: 0.5rem;
}

.image-actions {
  display: flex;
  gap: 0.375rem;
}

.image-actions .btn {
  flex: 1;
  padding: 0.3rem 0.4rem;
  font-size: 0.7rem;
}

.move-btns {
  display: flex;
  gap: 0.25rem;
  margin-top: 0.375rem;
}

.move-btns .btn {
  flex: 1;
  padding: 0.25rem;
  font-size: 0.65rem;
}

/* Settings Grid */
.settings-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
}

@media (min-width: 640px) {
  .settings-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 768px) {
  .settings-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.setting-group label {
  display: block;
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--color-gray-600);
  margin-bottom: 0.375rem;
}

.setting-group select {
  width: 100%;
  padding: 0.5rem 0.75rem;
  border: 1px solid var(--color-gray-300);
  border-radius: 0.5rem;
  background: white;
  color: var(--color-gray-800);
  font-size: 0.875rem;
  appearance: none;
  background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 20 20'%3e%3cpath stroke='%236b7280' stroke-linecap='round' stroke-linejoin='round' stroke-width='1.5' d='M6 8l4 4 4-4'/%3e%3c/svg%3e");
  background-position: right 0.5rem center;
  background-repeat: no-repeat;
  background-size: 1.25em 1.25em;
  padding-right: 2rem;
}

.setting-group select:focus {
  outline: 2px solid var(--color-primary);
  outline-offset: 1px;
  border-color: var(--color-primary);
}

/* Branding */
.checkbox-row {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  margin-bottom: 1rem;
}

.checkbox-row:last-child { margin-bottom: 0; }

.checkbox-row input[type="checkbox"] {
  width: 1.125rem;
  height: 1.125rem;
  margin-top: 0.125rem;
  accent-color: var(--color-primary);
  cursor: pointer;
  flex-shrink: 0;
}

.checkbox-row label {
  cursor: pointer;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-gray-800);
}

.checkbox-row .hint {
  display: block;
  font-size: 0.75rem;
  font-weight: 400;
  color: var(--color-gray-500);
  margin-top: 0.125rem;
}

/* Preview */
.preview-container {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  justify-content: center;
  min-height: 8rem;
  background: var(--color-gray-100);
  border-radius: var(--radius-xl);
  padding: 1rem;
  overflow-x: auto;
}

.preview-page {
  background: white;
  border: 1px solid var(--color-gray-300);
  box-shadow: var(--shadow);
  border-radius: 0.25rem;
  position: relative;
  overflow: hidden;
  flex-shrink: 0;
}

.preview-page-label {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  background: rgba(0,0,0,0.6);
  color: white;
  font-size: 0.65rem;
  text-align: center;
  padding: 0.15rem;
}

.preview-empty {
  color: var(--color-gray-400);
  font-size: 0.875rem;
  text-align: center;
  width: 100%;
  padding: 2rem 0;
}

/* Generate Area */
.generate-area {
  text-align: center;
  padding: 1.5rem;
  background: var(--color-gray-50);
}

.generate-area .btn-lg {
  min-width: 14rem;
}

/* Success State */
.success-state {
  text-align: center;
  padding: 2rem 1.5rem;
}

.success-icon {
  width: 3.5rem;
  height: 3.5rem;
  background: #dcfce7;
  color: var(--color-success);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 1rem;
  font-size: 1.5rem;
}

.success-state h3 {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-gray-900);
  margin-bottom: 0.375rem;
}

.success-state p {
  color: var(--color-gray-500);
  font-size: 0.875rem;
  margin-bottom: 1.25rem;
}

.filename-edit {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.25rem;
  margin-bottom: 1.5rem;
}

.filename-edit input {
  padding: 0.5rem 0.75rem;
  border: 1px solid var(--color-gray-300);
  border-radius: 0.5rem;
  font-size: 0.875rem;
  width: 12rem;
  text-align: center;
}

.filename-edit span {
  color: var(--color-gray-500);
  font-size: 0.875rem;
}

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

/* Privacy Section */
.privacy-section {
  background: white;
  border-radius: var(--radius-2xl);
  border: 1px solid var(--color-gray-200);
  padding: 1.5rem;
  margin-bottom: 2rem;
}

.privacy-section h2 {
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--color-gray-900);
  margin-bottom: 1rem;
  text-align: center;
}

.privacy-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
}

@media (min-width: 640px) {
  .privacy-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.privacy-item {
  text-align: center;
  padding: 0.75rem;
}

.privacy-item .icon {
  font-size: 1.5rem;
  margin-bottom: 0.5rem;
}

.privacy-item h3 {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--color-gray-800);
  margin-bottom: 0.25rem;
}

.privacy-item p {
  font-size: 0.75rem;
  color: var(--color-gray-500);
}

.how-it-works {
  margin-top: 1.25rem;
  padding-top: 1.25rem;
  border-top: 1px solid var(--color-gray-100);
  text-align: center;
}

.how-it-works h3 {
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--color-gray-700);
  margin-bottom: 0.375rem;
}

.how-it-works p {
  font-size: 0.75rem;
  color: var(--color-gray-500);
  max-width: 36rem;
  margin: 0 auto;
}

/* Other Tools */
.other-tools {
  margin-bottom: 2rem;
}

.other-tools h2 {
  font-size: 1rem;
  font-weight: 600;
  color: var(--color-gray-700);
  margin-bottom: 0.75rem;
  text-align: center;
}

.tools-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0.75rem;
}

@media (min-width: 640px) {
  .tools-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}

.tool-card {
  background: white;
  border: 1px solid var(--color-gray-200);
  border-radius: var(--radius-xl);
  padding: 1rem;
  text-align: center;
  text-decoration: none;
  color: inherit;
  transition: all 0.15s;
}

.tool-card:hover {
  border-color: var(--color-primary);
  box-shadow: var(--shadow-md);
}

.tool-card .icon {
  font-size: 1.25rem;
  margin-bottom: 0.375rem;
}

.tool-card h3 {
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--color-gray-800);
}

/* Footer */
.site-footer {
  text-align: center;
  padding: 1.5rem 1rem 2rem;
  color: var(--color-gray-400);
  font-size: 0.75rem;
}

.site-footer a {
  color: var(--color-gray-500);
  text-decoration: none;
}

.site-footer a:hover {
  color: var(--color-primary);
}

/* Progress Overlay */
.progress-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.45);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 100;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.2s, visibility 0.2s;
}

.progress-overlay.active {
  opacity: 1;
  visibility: visible;
}

.progress-box {
  background: white;
  border-radius: var(--radius-2xl);
  padding: 2rem;
  width: 90%;
  max-width: 22rem;
  text-align: center;
  box-shadow: var(--shadow-lg);
}

.progress-box h3 {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 0.75rem;
  color: var(--color-gray-900);
}

.progress-bar-track {
  height: 0.5rem;
  background: var(--color-gray-200);
  border-radius: 9999px;
  overflow: hidden;
  margin-bottom: 0.75rem;
}

.progress-bar-fill {
  height: 100%;
  background: var(--color-primary);
  border-radius: 9999px;
  width: 0%;
  transition: width 0.25s ease;
}

.progress-text {
  font-size: 0.8125rem;
  color: var(--color-gray-500);
}

/* Toast / Error */
.toast {
  position: fixed;
  bottom: 1.5rem;
  left: 50%;
  transform: translateX(-50%) translateY(120%);
  background: var(--color-gray-900);
  color: white;
  padding: 0.75rem 1.25rem;
  border-radius: 0.75rem;
  font-size: 0.875rem;
  box-shadow: var(--shadow-lg);
  z-index: 110;
  transition: transform 0.3s ease;
  max-width: 90%;
  text-align: center;
}

.toast.show {
  transform: translateX(-50%) translateY(0);
}

.toast.error {
  background: #991b1b;
}

/* Utility */
.hidden { display: none !important; }

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

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

button:focus:not(:focus-visible) {
  outline: none;
}

/* Sticky generate on mobile */
@media (max-width: 639px) {
  .generate-area {
    position: sticky;
    bottom: 0;
    z-index: 40;
    box-shadow: 0 -4px 12px rgb(0 0 0 / 0.08);
    border-top: 1px solid var(--color-gray-200);
  }
}

/* Loading spinner */
.spinner {
  display: inline-block;
  width: 1.25rem;
  height: 1.25rem;
  border: 2px solid rgba(255,255,255,0.3);
  border-top-color: white;
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

/* ========== Tool cards (as buttons) ========== */
.tool-card {
  background: white;
  border: 1px solid var(--color-gray-200);
  border-radius: var(--radius-xl);
  padding: 1rem;
  text-align: center;
  cursor: pointer;
  transition: all 0.15s;
  width: 100%;
  font: inherit;
  color: inherit;
  display: block;
}

.tool-card:hover {
  border-color: var(--color-primary);
  box-shadow: var(--shadow-md);
  transform: translateY(-1px);
}

.tool-card:active {
  transform: translateY(0);
}

.tool-card .icon {
  font-size: 1.25rem;
  margin-bottom: 0.375rem;
}

.tool-card h3 {
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--color-gray-800);
  margin: 0;
}

/* ========== Coming Soon Modal ========== */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.45);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 120;
  padding: 1rem;
  opacity: 1;
  transition: opacity 0.2s;
}

.modal-overlay[hidden] {
  display: none;
}

.modal-box {
  background: white;
  border-radius: var(--radius-2xl);
  padding: 2rem 1.75rem 1.75rem;
  width: 100%;
  max-width: 22rem;
  text-align: center;
  box-shadow: var(--shadow-lg);
  position: relative;
  animation: modalIn 0.22s ease;
}

@keyframes modalIn {
  from {
    opacity: 0;
    transform: scale(0.95) translateY(8px);
  }
  to {
    opacity: 1;
    transform: scale(1) translateY(0);
  }
}

.modal-close {
  position: absolute;
  top: 0.75rem;
  right: 0.75rem;
  width: 2rem;
  height: 2rem;
  border: none;
  background: var(--color-gray-100);
  color: var(--color-gray-600);
  border-radius: 50%;
  font-size: 1.25rem;
  line-height: 1;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background 0.15s;
}

.modal-close:hover {
  background: var(--color-gray-200);
  color: var(--color-gray-900);
}

.modal-icon {
  font-size: 2.25rem;
  margin-bottom: 0.75rem;
}

.modal-box h3 {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-gray-900);
  margin-bottom: 0.5rem;
}

.modal-box p {
  font-size: 0.875rem;
  color: var(--color-gray-600);
  margin-bottom: 0.75rem;
  line-height: 1.5;
}

.modal-hint {
  font-size: 0.8125rem !important;
  color: var(--color-gray-500) !important;
  margin-bottom: 1.25rem !important;
}

.modal-box .btn {
  min-width: 8rem;
}