/* ==========================================================================
   PDF to EPUB Pro - Design System & Stylesheet
   Crafted with 30+ years engineering precision & modern aesthetic flair
   ========================================================================== */

:root {
  /* Color Palette - Cyber Dark & Emerald Radiance */
  --bg-primary: #090d16;
  --bg-secondary: #0f172a;
  --bg-tertiary: #1e293b;
  --bg-card: rgba(15, 23, 42, 0.75);
  --bg-card-hover: rgba(30, 41, 59, 0.85);
  --bg-glass: rgba(255, 255, 255, 0.03);
  
  --border-color: rgba(255, 255, 255, 0.08);
  --border-focus: rgba(99, 102, 241, 0.5);
  --border-highlight: rgba(56, 189, 248, 0.3);

  --text-primary: #f8fafc;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --text-inverse: #090d16;

  --accent-primary: #6366f1;
  --accent-primary-hover: #4f46e5;
  --accent-cyan: #38bdf8;
  --accent-emerald: #10b981;
  --accent-amber: #f59e0b;
  --accent-rose: #f43f5e;
  --accent-purple: #a855f7;

  --gradient-primary: linear-gradient(135deg, #38bdf8 0%, #6366f1 50%, #a855f7 100%);
  --gradient-glow: radial-gradient(circle at 50% 0%, rgba(99, 102, 241, 0.15) 0%, transparent 70%);
  --gradient-card: linear-gradient(180deg, rgba(255, 255, 255, 0.05) 0%, rgba(255, 255, 255, 0.01) 100%);

  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 20px 48px -10px rgba(0, 0, 0, 0.6);
  --shadow-glow: 0 0 40px rgba(99, 102, 241, 0.25);

  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-full: 9999px;

  --font-display: 'Outfit', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --transition-fast: 0.15s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-normal: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Light Theme Variables */
[data-theme="light"] {
  --bg-primary: #f8fafc;
  --bg-secondary: #ffffff;
  --bg-tertiary: #f1f5f9;
  --bg-card: rgba(255, 255, 255, 0.85);
  --bg-card-hover: #ffffff;
  --bg-glass: rgba(0, 0, 0, 0.02);

  --border-color: rgba(0, 0, 0, 0.08);
  --border-focus: rgba(99, 102, 241, 0.4);
  --border-highlight: rgba(56, 189, 248, 0.4);

  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-muted: #64748b;
  --text-inverse: #ffffff;

  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.06);
  --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 20px 48px -10px rgba(0, 0, 0, 0.12);
  --shadow-glow: 0 0 35px rgba(99, 102, 241, 0.15);
  --gradient-glow: radial-gradient(circle at 50% 0%, rgba(99, 102, 241, 0.08) 0%, transparent 70%);
}

/* Light Theme Overrides & Refinements */
[data-theme="light"] .comparison-table th {
  background: rgba(0, 0, 0, 0.03);
  color: #334155;
}

[data-theme="light"] .comparison-table th.our-tool,
[data-theme="light"] .comparison-table td.our-tool {
  background: rgba(99, 102, 241, 0.04);
}

[data-theme="light"] .modal-card {
  background: #ffffff;
  border-color: rgba(0, 0, 0, 0.12);
}

[data-theme="light"] .form-input,
[data-theme="light"] .form-select,
[data-theme="light"] .contact-textarea {
  background: #ffffff;
  border-color: rgba(0, 0, 0, 0.14);
  color: #0f172a;
}

[data-theme="light"] .step-number {
  color: rgba(0, 0, 0, 0.06);
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-body);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
  position: relative;
  min-height: 100vh;
  transition: background-color var(--transition-normal), color var(--transition-normal);
}

/* Background Ambient Glow */
.ambient-glow {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background: var(--gradient-glow);
  pointer-events: none;
  z-index: 0;
}

/* Container */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  position: relative;
  z-index: 1;
}

/* Header & Navigation */
.site-header {
  position: sticky;
  top: 0;
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  background: rgba(9, 13, 22, 0.75);
  border-bottom: 1px solid var(--border-color);
  z-index: 100;
  transition: background var(--transition-normal);
}

[data-theme="light"] .site-header {
  background: rgba(255, 255, 255, 0.85);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

.brand-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  color: var(--text-primary);
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.35rem;
}

.brand-icon {
  width: 38px;
  height: 38px;
  border-radius: 10px;
  box-shadow: 0 4px 12px rgba(99, 102, 241, 0.3);
}

.brand-tag {
  font-size: 0.68rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  padding: 2px 8px;
  background: rgba(16, 185, 129, 0.15);
  color: var(--accent-emerald);
  border: 1px solid rgba(16, 185, 129, 0.3);
  border-radius: var(--radius-full);
  font-weight: 600;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 28px;
  list-style: none;
}

.nav-link {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.95rem;
  font-weight: 500;
  transition: color var(--transition-fast);
}

.nav-link:hover {
  color: var(--text-primary);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 14px;
}

.theme-toggle-btn {
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  width: 40px;
  height: 40px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.theme-toggle-btn:hover {
  color: var(--text-primary);
  border-color: var(--accent-primary);
}

.github-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 16px;
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  text-decoration: none;
  font-size: 0.88rem;
  font-weight: 600;
  transition: all var(--transition-fast);
}

.github-btn:hover {
  background: var(--accent-primary);
  border-color: var(--accent-primary);
  box-shadow: 0 4px 14px rgba(99, 102, 241, 0.35);
}

/* Hero Section */
.hero-section {
  padding: 56px 0 40px;
  text-align: center;
}

.trust-badge-wrap {
  margin-bottom: 20px;
}

.trust-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 16px;
  background: rgba(99, 102, 241, 0.1);
  border: 1px solid rgba(99, 102, 241, 0.25);
  border-radius: var(--radius-full);
  color: var(--accent-cyan);
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.02em;
}

.pulse-dot {
  width: 8px;
  height: 8px;
  background-color: var(--accent-emerald);
  border-radius: 50%;
  box-shadow: 0 0 10px var(--accent-emerald);
  animation: pulse-dot-anim 2s infinite;
}

@keyframes pulse-dot-anim {
  0% { transform: scale(0.95); opacity: 0.7; }
  50% { transform: scale(1.3); opacity: 1; }
  100% { transform: scale(0.95); opacity: 0.7; }
}

.hero-title {
  font-family: var(--font-display);
  font-size: clamp(2.2rem, 5vw, 3.6rem);
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -0.02em;
  margin-bottom: 18px;
}

.gradient-text {
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-subtitle {
  font-size: clamp(1rem, 2vw, 1.25rem);
  color: var(--text-secondary);
  max-width: 720px;
  margin: 0 auto 36px;
  font-weight: 400;
}

/* App Converter Section */
.converter-container {
  max-width: 860px;
  margin: 0 auto 60px;
}

.converter-card {
  background: var(--bg-card);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg), var(--shadow-glow);
  padding: 32px;
  position: relative;
  overflow: hidden;
}

.converter-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--gradient-primary);
}

/* Dropzone */
.dropzone {
  border: 2px dashed var(--border-color);
  border-radius: var(--radius-md);
  padding: 48px 24px;
  text-align: center;
  background: var(--bg-glass);
  cursor: pointer;
  transition: all var(--transition-normal);
  position: relative;
}

.dropzone:hover, .dropzone.drag-active {
  border-color: var(--accent-cyan);
  background: rgba(56, 189, 248, 0.05);
  transform: translateY(-2px);
  box-shadow: 0 10px 30px rgba(56, 189, 248, 0.1);
}

.dropzone.drag-active {
  border-color: var(--accent-emerald);
  background: rgba(16, 185, 129, 0.08);
}

.dropzone-icon-wrap {
  width: 72px;
  height: 72px;
  margin: 0 auto 16px;
  background: linear-gradient(135deg, rgba(99, 102, 241, 0.15), rgba(56, 189, 248, 0.15));
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent-cyan);
  transition: transform var(--transition-normal);
}

.dropzone:hover .dropzone-icon-wrap {
  transform: scale(1.08) rotate(4deg);
}

.dropzone-heading {
  font-family: var(--font-display);
  font-size: 1.4rem;
  font-weight: 700;
  margin-bottom: 8px;
}

.dropzone-subtext {
  color: var(--text-secondary);
  font-size: 0.95rem;
  margin-bottom: 20px;
}

.dropzone-actions {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
}

.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 28px;
  background: var(--gradient-primary);
  color: #ffffff;
  border: none;
  border-radius: var(--radius-sm);
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  box-shadow: 0 4px 18px rgba(99, 102, 241, 0.4);
  transition: all var(--transition-fast);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(99, 102, 241, 0.6);
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 22px;
  background: var(--bg-tertiary);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.btn-secondary:hover {
  border-color: var(--accent-primary);
  background: var(--bg-card-hover);
}

.sample-pdf-btn {
  background: transparent;
  color: var(--accent-cyan);
  border: 1px dashed var(--accent-cyan);
  padding: 8px 16px;
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  cursor: pointer;
  margin-top: 14px;
  transition: all var(--transition-fast);
}

.sample-pdf-btn:hover {
  background: rgba(56, 189, 248, 0.1);
}

.dropzone-footer-specs {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 20px;
  margin-top: 24px;
  color: var(--text-muted);
  font-size: 0.82rem;
  flex-wrap: wrap;
}

.dropzone-footer-specs span {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

/* Quick Settings Bar */
.quick-settings-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: 24px;
  padding-top: 20px;
  border-top: 1px solid var(--border-color);
  flex-wrap: wrap;
  gap: 16px;
}

.quick-switches {
  display: flex;
  align-items: center;
  gap: 20px;
  flex-wrap: wrap;
}

.switch-label {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.88rem;
  color: var(--text-secondary);
  cursor: pointer;
  user-select: none;
}

.switch-label input[type="checkbox"] {
  accent-color: var(--accent-primary);
  width: 17px;
  height: 17px;
  cursor: pointer;
}

.btn-options-modal {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: transparent;
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  padding: 7px 14px;
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.btn-options-modal:hover {
  color: var(--text-primary);
  border-color: var(--accent-primary);
}

/* Conversion Queue & Items */
.queue-container {
  margin-top: 28px;
  display: none;
}

.queue-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 16px;
  flex-wrap: wrap;
  gap: 12px;
}

.queue-title {
  font-family: var(--font-display);
  font-size: 1.15rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  gap: 8px;
}

.queue-badge {
  background: var(--accent-primary);
  color: #ffffff;
  padding: 2px 8px;
  border-radius: var(--radius-full);
  font-size: 0.75rem;
  font-weight: 700;
}

.queue-actions {
  display: flex;
  gap: 10px;
}

.file-item {
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 16px 20px;
  margin-bottom: 12px;
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 16px;
  transition: all var(--transition-fast);
}

.file-item:hover {
  border-color: var(--border-highlight);
}

.file-thumb {
  width: 44px;
  height: 56px;
  background: rgba(99, 102, 241, 0.15);
  border: 1px solid var(--border-color);
  border-radius: 6px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent-cyan);
  font-weight: 700;
  font-size: 0.75rem;
  text-transform: uppercase;
  position: relative;
  overflow: hidden;
}

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

.file-info {
  min-width: 0;
}

.file-name {
  font-weight: 600;
  font-size: 0.95rem;
  color: var(--text-primary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  margin-bottom: 4px;
}

.file-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 0.8rem;
  color: var(--text-muted);
}

.file-progress-bar-wrap {
  width: 100%;
  height: 6px;
  background: rgba(255, 255, 255, 0.08);
  border-radius: 3px;
  margin-top: 8px;
  overflow: hidden;
}

.file-progress-bar {
  height: 100%;
  width: 0%;
  background: var(--gradient-primary);
  border-radius: 3px;
  transition: width 0.3s ease;
}

.file-status-text {
  font-size: 0.78rem;
  color: var(--accent-cyan);
  margin-top: 4px;
}

.file-actions {
  display: flex;
  align-items: center;
  gap: 8px;
}

.btn-file-action {
  padding: 7px 14px;
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  border: none;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: all var(--transition-fast);
}

.btn-file-convert {
  background: var(--accent-primary);
  color: #ffffff;
}

.btn-file-convert:hover {
  background: var(--accent-primary-hover);
}

.btn-file-preview {
  background: rgba(56, 189, 248, 0.15);
  color: var(--accent-cyan);
  border: 1px solid rgba(56, 189, 248, 0.3);
}

.btn-file-preview:hover {
  background: rgba(56, 189, 248, 0.25);
}

.btn-file-download {
  background: var(--accent-emerald);
  color: #ffffff;
}

.btn-file-download:hover {
  background: #059669;
}

.btn-file-remove {
  background: transparent;
  color: var(--text-muted);
  border: none;
  padding: 6px;
  cursor: pointer;
  border-radius: 4px;
}

.btn-file-remove:hover {
  color: var(--accent-rose);
  background: rgba(244, 63, 94, 0.1);
}

/* Comparison Table Section */
.comparison-section {
  padding: 80px 0;
}

.section-header {
  text-align: center;
  max-width: 700px;
  margin: 0 auto 48px;
}

.section-badge {
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--accent-primary);
  font-weight: 700;
  margin-bottom: 8px;
  display: block;
}

.section-title {
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 3.5vw, 2.5rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: 12px;
}

.section-desc {
  color: var(--text-secondary);
  font-size: 1.05rem;
}

.table-responsive {
  overflow-x: auto;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-color);
  background: var(--bg-card);
  backdrop-filter: blur(16px);
}

.comparison-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 0.95rem;
}

.comparison-table th, .comparison-table td {
  padding: 18px 24px;
  border-bottom: 1px solid var(--border-color);
}

.comparison-table th {
  background: rgba(0, 0, 0, 0.2);
  font-family: var(--font-display);
  font-weight: 700;
  color: var(--text-secondary);
  text-transform: uppercase;
  font-size: 0.82rem;
  letter-spacing: 0.05em;
}

.comparison-table th.our-tool, .comparison-table td.our-tool {
  background: rgba(99, 102, 241, 0.08);
  border-left: 2px solid var(--accent-primary);
  border-right: 2px solid var(--accent-primary);
}

.comparison-table th.our-tool {
  color: var(--accent-cyan);
  font-size: 1rem;
}

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

.feature-check {
  color: var(--accent-emerald);
  font-weight: bold;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.feature-cross {
  color: var(--accent-rose);
  font-weight: bold;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.feature-warn {
  color: var(--accent-amber);
  font-size: 0.88rem;
}

/* Features Grid */
.features-section {
  padding: 40px 0 80px;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 24px;
}

.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 32px;
  transition: all var(--transition-normal);
  position: relative;
}

.feature-card:hover {
  transform: translateY(-4px);
  border-color: var(--border-highlight);
  box-shadow: var(--shadow-md);
}

.feature-icon-box {
  width: 54px;
  height: 54px;
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent-cyan);
  margin-bottom: 20px;
}

.feature-title {
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 10px;
}

.feature-text {
  color: var(--text-secondary);
  font-size: 0.92rem;
  line-height: 1.6;
}

/* How It Works Section */
.how-it-works-section {
  padding: 80px 0;
  background: var(--bg-secondary);
  border-top: 1px solid var(--border-color);
  border-bottom: 1px solid var(--border-color);
}

.steps-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 32px;
  margin-top: 40px;
}

.step-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 32px;
  position: relative;
}

.step-number {
  position: absolute;
  top: 24px;
  right: 24px;
  font-family: var(--font-display);
  font-size: 2.4rem;
  font-weight: 800;
  color: rgba(255, 255, 255, 0.05);
}

[data-theme="light"] .step-number {
  color: rgba(0, 0, 0, 0.06);
}

.step-title {
  font-family: var(--font-display);
  font-size: 1.2rem;
  font-weight: 700;
  margin: 16px 0 8px;
}

.step-desc {
  color: var(--text-secondary);
  font-size: 0.92rem;
}

/* E-Reader Transfer Guide */
.ereader-guide-section {
  padding: 80px 0;
}

.ereader-tabs {
  display: flex;
  gap: 12px;
  justify-content: center;
  margin-bottom: 32px;
  flex-wrap: wrap;
}

.ereader-tab-btn {
  padding: 10px 20px;
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  font-size: 0.92rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.ereader-tab-btn.active {
  background: var(--accent-primary);
  color: #ffffff;
  border-color: var(--accent-primary);
}

.ereader-content-box {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 36px;
  max-width: 800px;
  margin: 0 auto;
}

.ereader-pane {
  display: none;
}

.ereader-pane.active {
  display: block;
  animation: fadeIn 0.3s ease;
}

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

.ereader-pane h4 {
  font-family: var(--font-display);
  font-size: 1.3rem;
  margin-bottom: 14px;
}

.ereader-steps-list {
  padding-left: 20px;
  color: var(--text-secondary);
  font-size: 0.95rem;
}

.ereader-steps-list li {
  margin-bottom: 12px;
}

/* FAQ Accordion */
.faq-section {
  padding: 80px 0;
}

.faq-list {
  max-width: 800px;
  margin: 0 auto;
}

.faq-item {
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  background: var(--bg-card);
  margin-bottom: 12px;
  overflow: hidden;
  transition: border-color var(--transition-fast);
}

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

.faq-question {
  width: 100%;
  text-align: left;
  padding: 20px 24px;
  background: transparent;
  border: none;
  color: var(--text-primary);
  font-family: var(--font-display);
  font-size: 1.05rem;
  font-weight: 600;
  display: flex;
  align-items: center;
  justify-content: space-between;
  cursor: pointer;
}

.faq-icon {
  font-size: 1.3rem;
  color: var(--accent-cyan);
  transition: transform var(--transition-fast);
}

.faq-item.active .faq-icon {
  transform: rotate(45deg);
}

.faq-answer {
  padding: 0 24px 20px;
  color: var(--text-secondary);
  font-size: 0.94rem;
  display: none;
  line-height: 1.7;
}

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

/* Modal Overlay & Options */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background: rgba(0, 0, 0, 0.7);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  z-index: 1000;
  display: none;
  align-items: center;
  justify-content: center;
  padding: 20px;
}

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

.modal-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  width: 100%;
  max-width: 580px;
  box-shadow: var(--shadow-lg);
  overflow: hidden;
  animation: modalPop 0.25s cubic-bezier(0.16, 1, 0.3, 1);
}

@keyframes modalPop {
  from { opacity: 0; transform: scale(0.95); }
  to { opacity: 1; transform: scale(1); }
}

.modal-header {
  padding: 20px 24px;
  border-bottom: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.modal-title {
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 700;
}

.modal-close-btn {
  background: transparent;
  border: none;
  color: var(--text-muted);
  font-size: 1.5rem;
  cursor: pointer;
}

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

.modal-body {
  padding: 24px;
  max-height: 70vh;
  overflow-y: auto;
}

.form-group {
  margin-bottom: 20px;
}

.form-label {
  display: block;
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 8px;
}

.form-input, .form-select {
  width: 100%;
  padding: 10px 14px;
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-family: var(--font-body);
  font-size: 0.92rem;
  transition: border-color var(--transition-fast);
}

.form-input:focus, .form-select:focus {
  outline: none;
  border-color: var(--accent-primary);
}

.form-hint {
  font-size: 0.78rem;
  color: var(--text-muted);
  margin-top: 6px;
}

.modal-footer {
  padding: 16px 24px;
  border-top: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 12px;
}

/* Toast Notifications */
.toast-container {
  position: fixed;
  bottom: 24px;
  right: 24px;
  z-index: 2000;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.toast {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  padding: 12px 20px;
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-size: 0.9rem;
  box-shadow: var(--shadow-md);
  display: flex;
  align-items: center;
  gap: 10px;
  animation: slideInToast 0.3s ease;
}

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

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

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

/* Site Footer */
.site-footer {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border-color);
  padding: 60px 0 32px;
  color: var(--text-secondary);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 48px;
}

.footer-col h5 {
  color: var(--text-primary);
  font-family: var(--font-display);
  font-size: 1rem;
  margin-bottom: 16px;
}

.footer-links {
  list-style: none;
}

.footer-links li {
  margin-bottom: 10px;
}

.footer-links a {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.88rem;
  transition: color var(--transition-fast);
}

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

.footer-bottom {
  border-top: 1px solid var(--border-color);
  padding-top: 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.85rem;
  flex-wrap: wrap;
  gap: 16px;
}

/* Responsive Media Queries */
@media (max-width: 992px) {
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 768px) {
  .header-inner {
    height: 64px;
  }
  .nav-links {
    display: none;
  }
  .hero-section {
    padding: 36px 0 24px;
  }
  .converter-card {
    padding: 20px;
  }
  .dropzone {
    padding: 32px 16px;
  }
  .footer-grid {
    grid-template-columns: 1fr;
  }
  .file-item {
    grid-template-columns: 1fr;
    gap: 12px;
  }
  .file-actions {
    justify-content: flex-start;
    flex-wrap: wrap;
  }
}

/* ==========================================================================
   Cookie Banner Component
   ========================================================================== */
.cookie-banner {
  position: fixed;
  bottom: 24px;
  left: 24px;
  right: 24px;
  max-width: 540px;
  background: var(--bg-card);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 24px;
  box-shadow: var(--shadow-lg);
  z-index: 9999;
  display: flex;
  flex-direction: column;
  gap: 16px;
  animation: slideUpCookie 0.35s cubic-bezier(0.16, 1, 0.3, 1);
}

.cookie-banner.hidden {
  display: none !important;
}

@keyframes slideUpCookie {
  from { opacity: 0; transform: translateY(40px); }
  to { opacity: 1; transform: translateY(0); }
}

.cookie-header {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.1rem;
  color: var(--text-primary);
}

.cookie-text {
  color: var(--text-secondary);
  font-size: 0.88rem;
  line-height: 1.6;
}

.cookie-text a {
  color: var(--accent-cyan);
  text-decoration: underline;
}

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

.btn-cookie-accept {
  padding: 8px 20px;
  background: var(--gradient-primary);
  color: #ffffff;
  border: none;
  border-radius: var(--radius-sm);
  font-size: 0.88rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.btn-cookie-accept:hover {
  transform: translateY(-1px);
  box-shadow: 0 4px 14px rgba(99, 102, 241, 0.4);
}

.btn-cookie-decline {
  padding: 8px 18px;
  background: var(--bg-tertiary);
  color: var(--text-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  font-size: 0.88rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.btn-cookie-decline:hover {
  color: var(--text-primary);
  border-color: var(--accent-primary);
}

/* ==========================================================================
   Content & Legal Page Styles
   ========================================================================== */
.content-hero {
  padding: 56px 0 36px;
  text-align: center;
}

.content-hero-badge {
  display: inline-block;
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--accent-cyan);
  background: rgba(56, 189, 248, 0.1);
  border: 1px solid rgba(56, 189, 248, 0.25);
  padding: 4px 14px;
  border-radius: var(--radius-full);
  margin-bottom: 16px;
  font-weight: 600;
}

.content-hero-title {
  font-family: var(--font-display);
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: 14px;
}

.content-hero-subtitle {
  color: var(--text-secondary);
  font-size: 1.1rem;
  max-width: 680px;
  margin: 0 auto;
}

.content-container {
  max-width: 860px;
  margin: 0 auto 80px;
}

.content-card {
  background: var(--bg-card);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 40px;
  box-shadow: var(--shadow-md);
  margin-bottom: 32px;
}

.content-card h2 {
  font-family: var(--font-display);
  font-size: 1.6rem;
  font-weight: 700;
  margin-top: 32px;
  margin-bottom: 14px;
  color: var(--text-primary);
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 8px;
}

.content-card h2:first-child {
  margin-top: 0;
}

.content-card h3 {
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 600;
  margin-top: 24px;
  margin-bottom: 10px;
  color: var(--accent-cyan);
}

.content-card p {
  color: var(--text-secondary);
  font-size: 0.98rem;
  line-height: 1.75;
  margin-bottom: 18px;
}

.content-card ul, .content-card ol {
  color: var(--text-secondary);
  padding-left: 24px;
  margin-bottom: 20px;
  font-size: 0.96rem;
  line-height: 1.7;
}

.content-card li {
  margin-bottom: 8px;
}

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

.highlight-box {
  background: rgba(99, 102, 241, 0.08);
  border-left: 4px solid var(--accent-primary);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  padding: 16px 20px;
  margin: 24px 0;
}

.highlight-box p {
  margin: 0;
  color: var(--text-primary);
  font-weight: 500;
}

/* Contact Form */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

.contact-textarea {
  width: 100%;
  min-height: 140px;
  padding: 12px 14px;
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-family: var(--font-body);
  font-size: 0.92rem;
  resize: vertical;
}

.contact-textarea:focus {
  outline: none;
  border-color: var(--accent-primary);
}

.free-unlimited-pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: linear-gradient(135deg, rgba(16, 185, 129, 0.15), rgba(56, 189, 248, 0.15));
  color: var(--accent-emerald);
  border: 1px solid rgba(16, 185, 129, 0.35);
  padding: 4px 12px;
  border-radius: var(--radius-full);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

@media (max-width: 768px) {
  .cookie-banner {
    left: 12px;
    right: 12px;
    bottom: 12px;
  }
  .content-card {
    padding: 24px;
  }
  .contact-grid {
    grid-template-columns: 1fr;
  }
}