/* ==========================================================================
   PDF ROTATOR - UNIFIED DESIGN SYSTEM & CORE STYLES
   Modern, Accessible, Responsive, Dark/Light Mode
   ========================================================================== */

:root {
  /* Color Palette - Slate & Indigo */
  --font-sans: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;

  /* Dark Theme (Default) */
  --bg-primary: #0b0f19;
  --bg-secondary: #111827;
  --bg-surface: #1f2937;
  --bg-surface-hover: #374151;
  --bg-glass: rgba(17, 24, 39, 0.85);

  --text-primary: #f9fafb;
  --text-secondary: #9ca3af;
  --text-muted: #6b7280;

  --border-color: #374151;
  --border-light: #4b5563;

  --primary: #6366f1;
  --primary-hover: #4f46e5;
  --primary-light: rgba(99, 102, 241, 0.15);
  --primary-glow: rgba(99, 102, 241, 0.35);

  --success: #10b981;
  --success-bg: rgba(16, 185, 129, 0.15);
  --warning: #f59e0b;
  --warning-bg: rgba(245, 158, 11, 0.15);
  --danger: #ef4444;
  --danger-bg: rgba(239, 68, 68, 0.15);
  --accent: #06b6d4;

  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --radius-full: 9999px;

  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.4), 0 2px 4px -2px rgba(0, 0, 0, 0.3);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.5), 0 4px 6px -4px rgba(0, 0, 0, 0.4);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.6), 0 8px 10px -6px rgba(0, 0, 0, 0.5);

  --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-base: 250ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 350ms cubic-bezier(0.4, 0, 0.2, 1);

  --container-width: 1200px;
}

[data-theme="light"] {
  --bg-primary: #f8fafc;
  --bg-secondary: #ffffff;
  --bg-surface: #f1f5f9;
  --bg-surface-hover: #e2e8f0;
  --bg-glass: rgba(255, 255, 255, 0.9);

  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-muted: #94a3b8;

  --border-color: #e2e8f0;
  --border-light: #cbd5e1;

  --primary: #4f46e5;
  --primary-hover: #4338ca;
  --primary-light: rgba(79, 70, 229, 0.1);
  --primary-glow: rgba(79, 70, 229, 0.2);

  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.07), 0 2px 4px -2px rgba(0, 0, 0, 0.05);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -4px rgba(0, 0, 0, 0.05);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 8px 10px -6px rgba(0, 0, 0, 0.05);
}

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

html {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.6;
  color: var(--text-primary);
  background-color: var(--bg-primary);
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background-color: var(--bg-primary);
  color: var(--text-primary);
  overflow-x: hidden;
  transition: background-color var(--transition-base), color var(--transition-base);
}

a {
  color: var(--primary);
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover {
  text-decoration: underline;
}

img, svg {
  vertical-align: middle;
}

button, input, select, textarea {
  font-family: inherit;
  font-size: inherit;
  color: inherit;
}

button {
  cursor: pointer;
  border: none;
  background: none;
}

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

/* Layout Utilities */
.container {
  width: 100%;
  max-width: var(--container-width);
  margin-left: auto;
  margin-right: auto;
  padding-left: 1.25rem;
  padding-right: 1.25rem;
}

.container-narrow {
  max-width: 860px;
}

/* Navbar */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background-color: var(--bg-glass);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border-color);
  transition: background-color var(--transition-base), border-color var(--transition-base);
}

.navbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 4.5rem;
}

.brand-logo {
  display: flex;
  align-items: center;
  gap: 0.625rem;
  font-weight: 800;
  font-size: 1.3rem;
  color: var(--text-primary);
  text-decoration: none;
  letter-spacing: -0.02em;
}

.brand-logo svg {
  color: var(--primary);
  width: 2rem;
  height: 2rem;
  flex-shrink: 0;
}

.brand-logo:hover {
  text-decoration: none;
  opacity: 0.92;
}

/* Nav Container on Right */
.nav-right-container {
  display: flex;
  align-items: center;
  gap: 1.5rem;
}

.nav-menu {
  display: flex;
  align-items: center;
  list-style: none;
  gap: 1.25rem;
  margin: 0;
  padding: 0;
}

.nav-item {
  position: relative;
}

.nav-link {
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--text-secondary);
  transition: color var(--transition-fast);
  padding: 0.5rem 0.35rem;
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  text-decoration: none;
  border-radius: var(--radius-sm);
}

.nav-link:hover, .nav-link.active {
  color: var(--text-primary);
  text-decoration: none;
}

.nav-link.active::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0.35rem;
  right: 0.35rem;
  height: 2px;
  background-color: var(--primary);
  border-radius: var(--radius-full);
}

/* Dropdown Menu */
.nav-dropdown {
  position: relative;
}

.dropdown-menu {
  position: absolute;
  top: 100%;
  right: 0;
  margin-top: 0.5rem;
  min-width: 260px;
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-xl);
  padding: 0.5rem;
  display: none;
  flex-direction: column;
  gap: 0.25rem;
  z-index: 60;
  animation: dropdownFade 0.2s ease;
}

@keyframes dropdownFade {
  from {
    opacity: 0;
    transform: translateY(-6px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.nav-dropdown:hover .dropdown-menu,
.nav-dropdown:focus-within .dropdown-menu {
  display: flex;
}

.dropdown-item {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.625rem 0.875rem;
  border-radius: var(--radius-md);
  color: var(--text-primary);
  text-decoration: none;
  font-size: 0.875rem;
  font-weight: 500;
  transition: all var(--transition-fast);
}

.dropdown-item:hover {
  background-color: var(--bg-surface);
  color: var(--primary);
  text-decoration: none;
}

.dropdown-item svg {
  width: 1.125rem;
  height: 1.125rem;
  color: var(--primary);
  flex-shrink: 0;
}

.dropdown-item-desc {
  display: block;
  font-size: 0.75rem;
  color: var(--text-muted);
  font-weight: 400;
  margin-top: 0.125rem;
}

/* Nav Actions Right */
.nav-actions {
  display: flex;
  align-items: center;
  gap: 0.625rem;
}

.nav-cta-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-weight: 600;
  font-size: 0.875rem;
  padding: 0.5rem 1rem;
  box-shadow: var(--shadow-sm);
  white-space: nowrap;
}

/* Theme Toggle Button */
.btn-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.35rem;
  height: 2.35rem;
  border-radius: var(--radius-md);
  color: var(--text-secondary);
  background-color: var(--bg-surface);
  border: 1px solid var(--border-color);
  transition: all var(--transition-fast);
}

.btn-icon:hover {
  color: var(--text-primary);
  background-color: var(--bg-surface-hover);
  border-color: var(--border-light);
}

.mobile-nav-toggle {
  display: none;
}

/* Responsive Navigation Bar Breakpoints */
@media (max-width: 991px) {
  .nav-menu {
    display: none;
  }
  .mobile-nav-toggle {
    display: inline-flex;
  }
}

/* Mobile Drawer Navigation Backdrop & Sheet */
.mobile-drawer-overlay {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: rgba(0, 0, 0, 0.6);
  backdrop-filter: blur(4px);
  z-index: 98;
}

.mobile-drawer-overlay.open {
  display: block;
}

.mobile-menu-drawer {
  position: fixed;
  top: 0;
  right: -320px;
  width: 300px;
  max-width: 85vw;
  bottom: 0;
  background-color: var(--bg-secondary);
  border-left: 1px solid var(--border-color);
  box-shadow: var(--shadow-xl);
  padding: 1.5rem;
  z-index: 99;
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
  overflow-y: auto;
  transition: right 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

.mobile-menu-drawer.open {
  right: 0;
}

.mobile-drawer-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--border-color);
}

.mobile-drawer-title {
  font-weight: 700;
  font-size: 1.1rem;
  color: var(--text-primary);
}

.mobile-drawer-section-title {
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-muted);
  margin-top: 0.5rem;
  margin-bottom: 0.25rem;
}

.mobile-drawer-links {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.mobile-drawer-link {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.625rem 0.75rem;
  border-radius: var(--radius-md);
  color: var(--text-secondary);
  font-size: 0.9375rem;
  font-weight: 500;
  text-decoration: none;
  transition: all var(--transition-fast);
}

.mobile-drawer-link:hover, .mobile-drawer-link.active {
  background-color: var(--bg-surface);
  color: var(--primary);
  text-decoration: none;
}

.mobile-drawer-link svg {
  width: 1.125rem;
  height: 1.125rem;
  color: var(--primary);
  flex-shrink: 0;
}

.mobile-drawer-cta {
  margin-top: auto;
  padding-top: 1rem;
  border-top: 1px solid var(--border-color);
}

/* Hero Section */
.hero-section {
  padding: 3rem 0 2rem;
  text-align: center;
}

.badge-privacy {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.35rem 0.875rem;
  background-color: var(--success-bg);
  color: var(--success);
  border: 1px solid rgba(16, 185, 129, 0.3);
  border-radius: var(--radius-full);
  font-size: 0.8125rem;
  font-weight: 600;
  margin-bottom: 1.25rem;
}

.badge-privacy svg {
  width: 0.875rem;
  height: 0.875rem;
}

.hero-title {
  font-size: 2.25rem;
  font-weight: 800;
  line-height: 1.2;
  color: var(--text-primary);
  margin-bottom: 1rem;
  letter-spacing: -0.025em;
}

@media (min-width: 768px) {
  .hero-title {
    font-size: 3rem;
  }
}

.hero-subtitle {
  font-size: 1.125rem;
  color: var(--text-secondary);
  max-width: 720px;
  margin-left: auto;
  margin-right: auto;
  margin-bottom: 2rem;
  line-height: 1.6;
}

.hero-cta-actions {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1rem;
  flex-wrap: wrap;
  margin-bottom: 2.5rem;
}

/* Homepage Interactive Visual Preview Showcase */
.homepage-showcase-wrapper {
  max-width: 920px;
  margin: 0 auto 4.5rem;
}

.homepage-showcase-card {
  background: linear-gradient(180deg, var(--bg-secondary) 0%, var(--bg-surface) 100%);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-xl);
  padding: 2rem;
  position: relative;
  overflow: hidden;
}

.showcase-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1.5rem;
  flex-wrap: wrap;
  gap: 1rem;
}

.showcase-title-group h3 {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 0.25rem;
}

.showcase-title-group p {
  font-size: 0.875rem;
  color: var(--text-secondary);
}

.showcase-interactive-stage {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
  align-items: center;
  padding: 1.5rem;
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  margin-bottom: 1.5rem;
}

@media (min-width: 768px) {
  .showcase-interactive-stage {
    grid-template-columns: 1.2fr 1fr;
  }
}

.showcase-canvas-box {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 1.5rem;
  background-color: var(--bg-surface);
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
}

.demo-pdf-page {
  width: 170px;
  height: 230px;
  background-color: #ffffff;
  border-radius: 6px;
  box-shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.3), 0 8px 10px -6px rgba(0, 0, 0, 0.3);
  display: flex;
  flex-direction: column;
  padding: 1rem;
  color: #1e293b;
  position: relative;
  transition: transform 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
  transform-origin: center center;
}

.demo-pdf-header {
  height: 8px;
  width: 60%;
  background-color: #4f46e5;
  border-radius: 4px;
  margin-bottom: 8px;
}

.demo-pdf-line {
  height: 4px;
  background-color: #cbd5e1;
  border-radius: 2px;
  margin-bottom: 6px;
}

.demo-pdf-line.short {
  width: 45%;
}

.demo-pdf-img-placeholder {
  flex: 1;
  background: linear-gradient(135deg, #e0e7ff 0%, #c7d2fe 100%);
  border-radius: 4px;
  margin: 8px 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.75rem;
  font-weight: 700;
  color: #4338ca;
}

.showcase-controls-panel {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.showcase-controls-panel h4 {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text-primary);
}

.showcase-btn-row {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
}

/* Stats Counter Strip */
.stats-strip {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.25rem;
  margin: 3.5rem 0;
}

@media (min-width: 768px) {
  .stats-strip {
    grid-template-columns: repeat(4, 1fr);
  }
}

.stat-item {
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 1.5rem 1rem;
  text-align: center;
  transition: transform var(--transition-fast);
}

.stat-item:hover {
  transform: translateY(-2px);
  border-color: var(--border-light);
}

.stat-val {
  font-size: 1.75rem;
  font-weight: 800;
  color: var(--primary);
  line-height: 1.2;
  margin-bottom: 0.25rem;
}

.stat-label {
  font-size: 0.8125rem;
  color: var(--text-secondary);
  font-weight: 500;
}

/* Tool Directory Showcase on Homepage */
.tool-showcase-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
  margin: 2.5rem 0 4rem;
}

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

.tool-showcase-card {
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  padding: 2rem 1.5rem;
  display: flex;
  flex-direction: column;
  transition: all var(--transition-base);
  position: relative;
}

.tool-showcase-card:hover {
  border-color: var(--primary);
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.tool-showcase-icon {
  width: 3.25rem;
  height: 3.25rem;
  border-radius: var(--radius-lg);
  background-color: var(--primary-light);
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1.25rem;
}

.tool-showcase-title {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 0.5rem;
}

.tool-showcase-desc {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 1.5rem;
  flex-grow: 1;
}

/* CTA Banner Box */
.cta-banner-box {
  background: linear-gradient(135deg, rgba(79, 70, 229, 0.15) 0%, rgba(6, 182, 212, 0.15) 100%);
  border: 1px solid rgba(79, 70, 229, 0.3);
  border-radius: var(--radius-xl);
  padding: 3rem 2rem;
  text-align: center;
  margin: 4rem 0 2rem;
}

.cta-banner-title {
  font-size: 1.85rem;
  font-weight: 800;
  color: var(--text-primary);
  margin-bottom: 0.75rem;
  letter-spacing: -0.02em;
}

.cta-banner-desc {
  font-size: 1.0625rem;
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto 1.75rem;
}

/* Tool Workspace Container */
.tool-container {
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-xl);
  padding: 1.5rem;
  margin-bottom: 4rem;
  position: relative;
  transition: all var(--transition-base);
}

@media (min-width: 768px) {
  .tool-container {
    padding: 2.25rem;
  }
}

/* Dropzone */
.dropzone {
  border: 2px dashed var(--border-light);
  border-radius: var(--radius-lg);
  padding: 3.5rem 1.5rem;
  text-align: center;
  background-color: var(--bg-surface);
  cursor: pointer;
  transition: all var(--transition-base);
  position: relative;
}

.dropzone:hover, .dropzone.drag-active {
  border-color: var(--primary);
  background-color: var(--primary-light);
  transform: scale(1.005);
}

.dropzone-icon {
  width: 4rem;
  height: 4rem;
  margin: 0 auto 1.25rem;
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: var(--primary-light);
  border-radius: var(--radius-full);
}

.dropzone-icon svg {
  width: 2.25rem;
  height: 2.25rem;
}

.dropzone-title {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
  color: var(--text-primary);
}

.dropzone-desc {
  font-size: 0.9375rem;
  color: var(--text-secondary);
  margin-bottom: 1.5rem;
}

.dropzone-badges {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1.5rem;
  flex-wrap: wrap;
  margin-top: 1.5rem;
  font-size: 0.8125rem;
  color: var(--text-muted);
}

.dropzone-badges span {
  display: inline-flex;
  align-items: center;
  gap: 0.375rem;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  font-weight: 600;
  border-radius: var(--radius-md);
  padding: 0.625rem 1.25rem;
  transition: all var(--transition-fast);
  white-space: nowrap;
  font-size: 0.9375rem;
  text-decoration: none;
}

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

.btn-primary {
  background-color: var(--primary);
  color: #ffffff;
  box-shadow: 0 2px 4px rgba(79, 70, 229, 0.3);
}

.btn-primary:hover:not(:disabled) {
  background-color: var(--primary-hover);
  text-decoration: none;
  box-shadow: 0 4px 10px var(--primary-glow);
}

.btn-secondary {
  background-color: var(--bg-surface);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
}

.btn-secondary:hover:not(:disabled) {
  background-color: var(--bg-surface-hover);
  border-color: var(--border-light);
  text-decoration: none;
}

.btn-success {
  background-color: var(--success);
  color: #ffffff;
}

.btn-success:hover:not(:disabled) {
  background-color: #059669;
}

.btn-danger {
  background-color: var(--danger-bg);
  color: var(--danger);
  border: 1px solid rgba(239, 68, 68, 0.2);
}

.btn-danger:hover:not(:disabled) {
  background-color: var(--danger);
  color: #ffffff;
}

.btn-sm {
  padding: 0.375rem 0.75rem;
  font-size: 0.8125rem;
  border-radius: var(--radius-sm);
}

.btn-lg {
  padding: 0.875rem 1.75rem;
  font-size: 1.0625rem;
  border-radius: var(--radius-lg);
}

/* Loading & Progress State */
.loading-state {
  display: none;
  padding: 3rem 1.5rem;
  text-align: center;
}

.loading-state.active {
  display: block;
}

.spinner {
  width: 3rem;
  height: 3rem;
  border: 3px solid var(--border-color);
  border-top-color: var(--primary);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
  margin: 0 auto 1.5rem;
}

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

.progress-bar-container {
  width: 100%;
  max-width: 400px;
  height: 8px;
  background-color: var(--bg-surface);
  border-radius: var(--radius-full);
  margin: 1.25rem auto;
  overflow: hidden;
  border: 1px solid var(--border-color);
}

.progress-bar-fill {
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, var(--primary), var(--accent));
  border-radius: var(--radius-full);
  transition: width 0.2s ease;
}

/* Workspace Active State */
.workspace-active {
  display: none;
}

.workspace-active.active {
  display: block;
}

/* Document Info Header */
.doc-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
  padding-bottom: 1.25rem;
  margin-bottom: 1.5rem;
  border-bottom: 1px solid var(--border-color);
}

.doc-meta {
  display: flex;
  align-items: center;
  gap: 0.875rem;
}

.doc-icon {
  width: 2.5rem;
  height: 2.5rem;
  background-color: var(--primary-light);
  color: var(--primary);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
}

.doc-name {
  font-weight: 700;
  font-size: 1.0625rem;
  color: var(--text-primary);
  max-width: 300px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.doc-stats {
  font-size: 0.8125rem;
  color: var(--text-muted);
  display: flex;
  gap: 0.75rem;
}

/* Toolbar Control Bar */
.toolbar {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 1rem;
  margin-bottom: 1.75rem;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.toolbar-group {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.toolbar-label {
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-right: 0.25rem;
}

/* Thumbnail Grid */
.thumbnail-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: 1.5rem;
  margin-bottom: 2.5rem;
  min-height: 200px;
}

@media (min-width: 768px) {
  .thumbnail-grid {
    grid-template-columns: repeat(auto-fill, minmax(210px, 1fr));
    gap: 1.75rem;
  }
}

/* Page Card */
.page-card {
  background-color: var(--bg-surface);
  border: 2px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 0.875rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  position: relative;
  transition: all var(--transition-base);
  box-shadow: var(--shadow-sm);
}

.page-card:hover {
  border-color: var(--border-light);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.page-card.selected {
  border-color: var(--primary);
  background-color: var(--primary-light);
}

.page-badge-container {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 0.75rem;
}

.page-num-badge {
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--text-secondary);
  background-color: var(--bg-secondary);
  padding: 0.2rem 0.5rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-color);
}

.rotation-deg-badge {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--primary);
  background-color: var(--primary-light);
  padding: 0.2rem 0.5rem;
  border-radius: var(--radius-sm);
}

.page-canvas-wrapper {
  width: 100%;
  aspect-ratio: 1 / 1.35;
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: #ffffff;
  border-radius: var(--radius-sm);
  overflow: hidden;
  padding: 0.5rem;
  position: relative;
  box-shadow: inset 0 0 4px rgba(0, 0, 0, 0.1);
}

.page-canvas-wrapper canvas {
  max-width: 100%;
  max-height: 100%;
  object-fit: contain;
  transition: transform var(--transition-base);
}

.page-controls {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  margin-top: 0.875rem;
}

.btn-rotate {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.25rem;
  height: 2.25rem;
  border-radius: var(--radius-md);
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  color: var(--text-primary);
  transition: all var(--transition-fast);
}

.btn-rotate:hover {
  background-color: var(--primary);
  color: #ffffff;
  border-color: var(--primary);
  transform: scale(1.05);
}

.btn-rotate svg {
  width: 1.125rem;
  height: 1.125rem;
}

/* Bottom Action Bar */
.action-bar-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1.25rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--border-color);
}

/* Floating Bottom Bar (Mobile/Sticky) */
@media (max-width: 767px) {
  .floating-action-bar {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background-color: var(--bg-glass);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-top: 1px solid var(--border-color);
    padding: 0.875rem 1.25rem;
    z-index: 40;
    box-shadow: var(--shadow-xl);
    display: flex;
    align-items: center;
    justify-content: space-between;
  }
}

/* Selection Range Helper */
.range-selector-box {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1rem;
  margin-bottom: 1.5rem;
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex-wrap: wrap;
}

.range-input {
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: 0.5rem 0.75rem;
  color: var(--text-primary);
  font-size: 0.9375rem;
  min-width: 200px;
  flex: 1;
}

.range-input:focus {
  border-color: var(--primary);
}

/* Modal */
.modal-overlay {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: rgba(0, 0, 0, 0.75);
  backdrop-filter: blur(4px);
  z-index: 100;
  align-items: center;
  justify-content: center;
  padding: 1.5rem;
}

.modal-overlay.active {
  display: flex;
}

.modal-card {
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  max-width: 600px;
  width: 100%;
  padding: 2rem;
  box-shadow: var(--shadow-xl);
  position: relative;
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1.25rem;
}

.modal-title {
  font-size: 1.25rem;
  font-weight: 700;
}

.modal-close {
  color: var(--text-muted);
}

.modal-close:hover {
  color: var(--text-primary);
}

/* Toast Notifications */
.toast-container {
  position: fixed;
  top: 5rem;
  right: 1.5rem;
  z-index: 110;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  pointer-events: none;
}

.toast {
  pointer-events: auto;
  display: flex;
  align-items: center;
  gap: 0.75rem;
  background-color: var(--bg-surface);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 0.875rem 1.25rem;
  box-shadow: var(--shadow-lg);
  font-size: 0.9375rem;
  font-weight: 500;
  animation: slideIn 0.3s ease forwards;
  max-width: 360px;
}

.toast.toast-success {
  border-left: 4px solid var(--success);
}

.toast.toast-error {
  border-left: 4px solid var(--danger);
}

.toast.toast-info {
  border-left: 4px solid var(--primary);
}

@keyframes slideIn {
  from {
    opacity: 0;
    transform: translateX(100%);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

/* SEO Content Engine Styles */
.content-section {
  padding: 4rem 0;
  border-top: 1px solid var(--border-color);
}

.prose {
  color: var(--text-secondary);
  font-size: 1.0625rem;
  line-height: 1.8;
}

.prose h2 {
  font-size: 1.75rem;
  font-weight: 800;
  color: var(--text-primary);
  margin-top: 2.5rem;
  margin-bottom: 1rem;
  letter-spacing: -0.02em;
  scroll-margin-top: 5rem;
}

.prose h3 {
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-top: 1.75rem;
  margin-bottom: 0.75rem;
  letter-spacing: -0.01em;
}

.prose p {
  margin-bottom: 1.25rem;
}

.prose ul, .prose ol {
  margin-bottom: 1.5rem;
  padding-left: 1.5rem;
}

.prose li {
  margin-bottom: 0.5rem;
}

.prose strong {
  color: var(--text-primary);
}

.prose code {
  font-family: var(--font-mono);
  background-color: var(--bg-surface);
  padding: 0.2rem 0.4rem;
  border-radius: var(--radius-sm);
  font-size: 0.9em;
  border: 1px solid var(--border-color);
  color: var(--accent);
}

/* Steps Grid */
.steps-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
  margin: 2rem 0;
}

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

.step-card {
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 1.75rem;
  position: relative;
  transition: all var(--transition-base);
}

.step-card:hover {
  border-color: var(--primary);
  transform: translateY(-2px);
}

.step-number {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.5rem;
  height: 2.5rem;
  background-color: var(--primary);
  color: #ffffff;
  font-weight: 800;
  border-radius: var(--radius-full);
  margin-bottom: 1.25rem;
}

.step-title {
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 0.5rem;
}

/* Feature Grid */
.features-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
  margin: 2rem 0;
}

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

@media (min-width: 1024px) {
  .features-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.feature-card {
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  transition: all var(--transition-base);
}

.feature-card:hover {
  border-color: var(--border-light);
}

.feature-icon {
  width: 2.75rem;
  height: 2.75rem;
  border-radius: var(--radius-md);
  background-color: var(--primary-light);
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1rem;
}

.feature-title {
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 0.5rem;
}

/* Comparison Table */
.table-responsive {
  width: 100%;
  overflow-x: auto;
  margin: 2rem 0;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
}

.comparison-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 0.9375rem;
}

.comparison-table th, .comparison-table td {
  padding: 1rem 1.25rem;
  border-bottom: 1px solid var(--border-color);
}

.comparison-table th {
  background-color: var(--bg-surface);
  font-weight: 700;
  color: var(--text-primary);
}

.comparison-table tr:last-child td {
  border-bottom: none;
}

.comparison-table tr:hover td {
  background-color: var(--bg-surface);
}

/* FAQ Accordion */
.faq-list {
  margin: 2rem 0;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.faq-item {
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: all var(--transition-fast);
}

.faq-item:hover {
  border-color: var(--border-light);
}

.faq-question {
  width: 100%;
  text-align: left;
  padding: 1.25rem 1.5rem;
  font-weight: 700;
  font-size: 1.0625rem;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.faq-question svg {
  width: 1.25rem;
  height: 1.25rem;
  color: var(--primary);
  transition: transform var(--transition-fast);
  flex-shrink: 0;
}

.faq-item.open .faq-question svg {
  transform: rotate(180deg);
}

.faq-answer {
  display: none;
  padding: 0 1.5rem 1.25rem;
  color: var(--text-secondary);
  font-size: 0.9375rem;
  line-height: 1.7;
}

.faq-item.open .faq-answer {
  display: block;
}

/* Breadcrumbs */
.breadcrumb-nav {
  padding: 1rem 0;
  font-size: 0.875rem;
  color: var(--text-muted);
}

.breadcrumb-list {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  list-style: none;
  flex-wrap: wrap;
}

.breadcrumb-list li+li::before {
  content: "/";
  color: var(--border-light);
  margin-right: 0.5rem;
}

.breadcrumb-list a {
  color: var(--text-secondary);
}

.breadcrumb-list a:hover {
  color: var(--primary);
}

/* Related Tools Bar */
.related-tools-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.25rem;
  margin: 2rem 0;
}

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

.related-tool-card {
  display: flex;
  flex-direction: column;
  padding: 1.25rem;
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  color: inherit;
  transition: all var(--transition-fast);
}

.related-tool-card:hover {
  border-color: var(--primary);
  transform: translateY(-2px);
  text-decoration: none;
}

.related-tool-card h4 {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 0.25rem;
}

.related-tool-card p {
  font-size: 0.8125rem;
  color: var(--text-secondary);
}

/* Footer */
.site-footer {
  margin-top: auto;
  background-color: var(--bg-secondary);
  border-top: 1px solid var(--border-color);
  padding: 4rem 0 2rem;
  color: var(--text-secondary);
  font-size: 0.9375rem;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2.5rem;
  margin-bottom: 3rem;
}

@media (min-width: 640px) {
  .footer-grid {
    grid-template-columns: 2fr repeat(3, 1fr);
  }
}

.footer-col h4 {
  color: var(--text-primary);
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 1.25rem;
}

.footer-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.footer-links a {
  color: var(--text-secondary);
}

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

.footer-bottom {
  padding-top: 2rem;
  border-top: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
  font-size: 0.875rem;
  color: var(--text-muted);
}

/* Form Elements */
.form-group {
  margin-bottom: 1.25rem;
}

.form-label {
  display: block;
  font-weight: 600;
  font-size: 0.875rem;
  margin-bottom: 0.5rem;
  color: var(--text-primary);
}

.form-control {
  width: 100%;
  padding: 0.75rem 1rem;
  background-color: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-size: 0.9375rem;
  transition: border-color var(--transition-fast);
}

.form-control:focus {
  border-color: var(--primary);
}

textarea.form-control {
  min-height: 120px;
  resize: vertical;
}