/* 
 * PDFTools - Premium Stylesheet
 * Modern design with task-based UX, glassmorphism, and micro-animations
 * AdSense-optimized layout
 */

/* ===== CSS Variables ===== */
:root {
  /* Primary Colors - Gradient Accent */
  --color-primary: #4f46e5;
  --color-primary-dark: #4338ca;
  --color-primary-light: #6366f1;
  --color-secondary: #7c3aed;
  --color-accent-gradient: linear-gradient(135deg, #4f46e5 0%, #7c3aed 100%);

  /* Status Colors */
  --color-success: #10b981;
  --color-success-light: #34d399;
  --color-warning: #f59e0b;
  --color-error: #ef4444;

  /* Neutral Colors */
  --color-white: #ffffff;
  --color-gray-50: #f8fafc;
  --color-gray-100: #f1f5f9;
  --color-gray-200: #e2e8f0;
  --color-gray-300: #cbd5e1;
  --color-gray-400: #94a3b8;
  --color-gray-500: #64748b;
  --color-gray-600: #475569;
  --color-gray-700: #334155;
  --color-gray-800: #1e293b;
  --color-gray-900: #0f172a;

  /* Typography */
  --font-family: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
    sans-serif;
  --font-size-xs: 0.75rem;
  --font-size-sm: 0.875rem;
  --font-size-base: 1rem;
  --font-size-lg: 1.125rem;
  --font-size-xl: 1.25rem;
  --font-size-2xl: 1.5rem;
  --font-size-3xl: 1.875rem;
  --font-size-4xl: 2.25rem;
  --font-size-5xl: 3rem;

  /* Spacing */
  --spacing-1: 0.25rem;
  --spacing-2: 0.5rem;
  --spacing-3: 0.75rem;
  --spacing-4: 1rem;
  --spacing-5: 1.25rem;
  --spacing-6: 1.5rem;
  --spacing-8: 2rem;
  --spacing-10: 2.5rem;
  --spacing-12: 3rem;
  --spacing-16: 4rem;
  --spacing-20: 5rem;

  /* Border Radius */
  --radius-sm: 0.25rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-2xl: 1.5rem;
  --radius-full: 9999px;

  /* Shadows */
  --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
  --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);
  --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1),
    0 8px 10px -6px rgb(0 0 0 / 0.1);
  --shadow-glow: 0 0 20px rgba(79, 70, 229, 0.3);
  --shadow-card: 0 4px 20px rgba(0, 0, 0, 0.08);

  /* Transitions */
  --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-normal: 250ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 350ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-bounce: 500ms cubic-bezier(0.68, -0.55, 0.265, 1.55);
}

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

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  line-height: 1.6;
  color: var(--color-gray-800);
  background-color: var(--color-gray-50);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

img,
picture,
video,
canvas,
svg {
  display: block;
  max-width: 100%;
}

input,
button,
textarea,
select {
  font: inherit;
}

a {
  color: inherit;
  text-decoration: none;
}

ul,
ol {
  list-style: none;
}

/* ===== Container ===== */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-4);
}

@media (min-width: 768px) {
  .container {
    padding: 0 var(--spacing-6);
  }
}

/* ===== Header ===== */
.header {
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--color-gray-200);
  position: sticky;
  top: 0;
  z-index: 100;
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.logo {
  display: flex;
  align-items: center;
  gap: var(--spacing-2);
  font-size: var(--font-size-xl);
  font-weight: 700;
  color: var(--color-gray-900);
  transition: transform var(--transition-fast);
}

.logo:hover {
  transform: scale(1.02);
}

.logo-icon {
  font-size: 1.75rem;
}

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

.nav-menu {
  display: flex;
  align-items: center;
  gap: var(--spacing-6);
}

.nav-link {
  color: var(--color-gray-600);
  font-weight: 500;
  position: relative;
  transition: color var(--transition-fast);
}

.nav-link::after {
  content: "";
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--color-accent-gradient);
  transition: width var(--transition-normal);
}

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

.nav-link:hover::after {
  width: 100%;
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: var(--spacing-3);
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--spacing-2);
}

.nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-gray-700);
  transition: var(--transition-fast);
}

/* ===== Language Switcher ===== */
.lang-switch {
  padding: var(--spacing-2) var(--spacing-3);
  background: var(--color-gray-100);
  border-radius: var(--radius-md);
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: var(--color-gray-700);
  transition: all var(--transition-fast);
}

.lang-switch:hover {
  background: var(--color-primary);
  color: var(--color-white);
  transform: translateY(-1px);
}

/* ===== Theme Toggle ===== */
.theme-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  background: var(--color-gray-100);
  border: none;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.theme-toggle:hover {
  background: var(--color-gray-200);
  transform: rotate(15deg);
}

.theme-icon-dark {
  display: none;
}

.theme-icon-light {
  display: block;
  font-size: 1.25rem;
}

/* ===== Ad Containers ===== */
.ad-container {
  background: var(--color-gray-100);
  padding: var(--spacing-3) 0;
}

.ad-placeholder {
  min-height: 90px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-gray-200);
  border-radius: var(--radius-lg);
  color: var(--color-gray-400);
  font-size: var(--font-size-sm);
}

.ad-sidebar {
  position: sticky;
  top: 80px;
}

/* ===== Main Content ===== */
.main {
  flex: 1;
  padding: var(--spacing-8) 0;
}

/* ===== Hero Section - Premium Design ===== */
.hero {
  text-align: center;
  padding: var(--spacing-12) 0 var(--spacing-16);
  position: relative;
}

.hero::before {
  content: "";
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 600px;
  height: 600px;
  background: radial-gradient(circle,
      rgba(79, 70, 229, 0.08) 0%,
      transparent 70%);
  pointer-events: none;
  z-index: -1;
}

.hero-title {
  font-size: var(--font-size-4xl);
  font-weight: 800;
  color: var(--color-gray-900);
  margin-bottom: var(--spacing-4);
  line-height: 1.2;
  letter-spacing: -0.02em;
}

.hero-title span {
  background: var(--color-accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-subtitle {
  font-size: var(--font-size-lg);
  color: var(--color-gray-600);
  max-width: 600px;
  margin: 0 auto var(--spacing-8);
  line-height: 1.7;
}

/* ===== Tools Section ===== */
.tools-section {
  padding: var(--spacing-8) 0;
}

.section-title {
  font-size: var(--font-size-2xl);
  font-weight: 700;
  color: var(--color-gray-900);
  margin-bottom: var(--spacing-8);
  text-align: center;
  position: relative;
}

.section-title::after {
  content: "";
  display: block;
  width: 60px;
  height: 4px;
  background: var(--color-accent-gradient);
  border-radius: var(--radius-full);
  margin: var(--spacing-4) auto 0;
}

/* ===== Tools Grid - Premium Cards ===== */
.tools-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: var(--spacing-6);
}

.tool-card {
  background: var(--color-white);
  border: 1px solid var(--color-gray-200);
  border-radius: var(--radius-2xl);
  padding: var(--spacing-6);
  transition: all var(--transition-normal);
  cursor: pointer;
  position: relative;
  overflow: hidden;
}

.tool-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--color-accent-gradient);
  transform: scaleX(0);
  transition: transform var(--transition-normal);
}

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

.tool-card:hover::before {
  transform: scaleX(1);
}

.tool-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 56px;
  height: 56px;
  background: linear-gradient(135deg,
      var(--color-gray-100),
      var(--color-gray-50));
  border-radius: var(--radius-xl);
  font-size: 1.75rem;
  margin-bottom: var(--spacing-4);
  transition: transform var(--transition-bounce);
}

.tool-card:hover .tool-icon {
  transform: scale(1.1) rotate(-3deg);
}

.tool-name {
  font-size: var(--font-size-lg);
  font-weight: 600;
  color: var(--color-gray-900);
  margin-bottom: var(--spacing-2);
}

.tool-description {
  color: var(--color-gray-500);
  font-size: var(--font-size-sm);
  line-height: 1.6;
}

.tool-card .tool-arrow {
  position: absolute;
  bottom: var(--spacing-6);
  right: var(--spacing-6);
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-gray-100);
  border-radius: var(--radius-full);
  color: var(--color-gray-400);
  font-size: 0.875rem;
  transition: all var(--transition-normal);
}

.tool-card:hover .tool-arrow {
  background: var(--color-primary);
  color: var(--color-white);
  transform: translateX(4px);
}

/* ===== Category Section ===== */
.category-section {
  margin-bottom: var(--spacing-12);
}

.category-header {
  display: flex;
  align-items: center;
  gap: var(--spacing-3);
  margin-bottom: var(--spacing-6);
}

.category-icon {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-accent-gradient);
  border-radius: var(--radius-lg);
  color: white;
  font-size: 1.25rem;
}

.category-title {
  font-size: var(--font-size-xl);
  font-weight: 600;
  color: var(--color-gray-800);
}

/* ===== Tool Page Layout ===== */
.tool-page {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-8);
}

@media (min-width: 1024px) {
  .tool-page {
    grid-template-columns: 1fr 320px;
  }
}

.tool-content {
  background: var(--color-white);
  border: 1px solid var(--color-gray-200);
  border-radius: var(--radius-2xl);
  padding: var(--spacing-8);
  box-shadow: var(--shadow-card);
}

.tool-title {
  font-size: var(--font-size-3xl);
  font-weight: 700;
  color: var(--color-gray-900);
  margin-bottom: var(--spacing-4);
  line-height: 1.3;
}

.tool-intro {
  color: var(--color-gray-600);
  margin-bottom: var(--spacing-8);
  line-height: 1.7;
  font-size: var(--font-size-lg);
}

/* ===== Upload Zone - Premium Design ===== */
.upload-zone {
  border: 2px dashed var(--color-gray-300);
  border-radius: var(--radius-2xl);
  padding: var(--spacing-12);
  text-align: center;
  transition: all var(--transition-normal);
  cursor: pointer;
  background: linear-gradient(180deg, var(--color-gray-50), var(--color-white));
  position: relative;
  overflow: hidden;
}

.upload-zone::before {
  content: "";
  position: absolute;
  inset: 0;
  background: var(--color-accent-gradient);
  opacity: 0;
  transition: opacity var(--transition-normal);
}

.upload-zone:hover,
.upload-zone.dragover {
  border-color: var(--color-primary);
  transform: scale(1.01);
}

.upload-zone:hover::before,
.upload-zone.dragover::before {
  opacity: 0.03;
}

.upload-zone.has-files {
  border-style: solid;
  border-color: var(--color-success);
  background: linear-gradient(180deg,
      rgba(16, 185, 129, 0.05),
      var(--color-white));
}

.upload-icon {
  font-size: 3.5rem;
  margin-bottom: var(--spacing-4);
  position: relative;
  z-index: 1;
  animation: float 3s ease-in-out infinite;
}

@keyframes float {

  0%,
  100% {
    transform: translateY(0);
  }

  50% {
    transform: translateY(-8px);
  }
}

.upload-text {
  font-size: var(--font-size-lg);
  font-weight: 600;
  color: var(--color-gray-700);
  margin-bottom: var(--spacing-2);
  position: relative;
  z-index: 1;
}

.upload-hint {
  font-size: var(--font-size-sm);
  color: var(--color-gray-500);
  position: relative;
  z-index: 1;
}

.upload-input {
  display: none;
}

/* ===== File List ===== */
.file-list {
  margin-top: var(--spacing-6);
}

.file-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--spacing-4);
  background: var(--color-gray-50);
  border-radius: var(--radius-lg);
  margin-bottom: var(--spacing-3);
  border: 1px solid var(--color-gray-200);
  animation: slideIn 0.3s ease-out;
}

@keyframes slideIn {
  from {
    opacity: 0;
    transform: translateY(-10px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.file-info {
  display: flex;
  align-items: center;
  gap: var(--spacing-3);
}

.file-icon {
  font-size: 1.5rem;
}

.file-name {
  font-weight: 500;
  color: var(--color-gray-800);
}

.file-size {
  font-size: var(--font-size-sm);
  color: var(--color-gray-500);
}

.file-remove {
  background: none;
  border: none;
  color: var(--color-gray-400);
  cursor: pointer;
  padding: var(--spacing-2);
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
}

.file-remove:hover {
  color: var(--color-error);
  background: rgba(239, 68, 68, 0.1);
}

/* ===== File Preview Thumbnail ===== */
.file-thumbnail {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-md);
  object-fit: cover;
  border: 2px solid var(--color-gray-200);
  background: var(--color-gray-100);
  flex-shrink: 0;
}

.file-thumbnail-pdf {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  border-radius: var(--radius-md);
  background: linear-gradient(135deg, #ef4444, #dc2626);
  color: white;
  font-size: var(--font-size-xs);
  font-weight: 700;
  flex-shrink: 0;
}

/* ===== Add More Files Button ===== */
.btn-add-files {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-2);
  width: 100%;
  padding: var(--spacing-3) var(--spacing-4);
  margin-top: var(--spacing-3);
  background: var(--color-gray-100);
  border: 2px dashed var(--color-gray-300);
  border-radius: var(--radius-lg);
  color: var(--color-gray-600);
  font-size: var(--font-size-sm);
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.btn-add-files:hover {
  background: var(--color-primary-light);
  border-color: var(--color-primary);
  color: white;
  transform: translateY(-1px);
}

.btn-add-files-icon {
  font-size: 1.25rem;
}

/* ===== Page Preview Grid (for Rotate PDF) ===== */
.page-preview-container {
  margin-top: var(--spacing-6);
  padding: var(--spacing-4);
  background: var(--color-gray-50);
  border-radius: var(--radius-xl);
  border: 1px solid var(--color-gray-200);
}

.page-preview-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--spacing-4);
  flex-wrap: wrap;
  gap: var(--spacing-3);
}

.page-preview-title {
  font-weight: 600;
  color: var(--color-gray-700);
}

.page-preview-actions {
  display: flex;
  gap: var(--spacing-2);
}

.page-preview-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
  gap: var(--spacing-4);
}

.page-preview-item {
  position: relative;
  background: var(--color-white);
  border: 2px solid var(--color-gray-200);
  border-radius: var(--radius-lg);
  padding: var(--spacing-2);
  text-align: center;
  transition: all var(--transition-fast);
  cursor: pointer;
}

.page-preview-item:hover {
  border-color: var(--color-primary-light);
  box-shadow: var(--shadow-md);
}

.page-preview-item.selected {
  border-color: var(--color-primary);
  background: rgba(79, 70, 229, 0.05);
}

.page-preview-checkbox {
  position: absolute;
  top: var(--spacing-2);
  left: var(--spacing-2);
  width: 20px;
  height: 20px;
  accent-color: var(--color-primary);
  cursor: pointer;
}

.page-preview-img {
  width: 100%;
  height: 140px;
  object-fit: contain;
  border-radius: var(--radius-sm);
  background: var(--color-gray-100);
  margin-bottom: var(--spacing-2);
}

.page-preview-label {
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: var(--color-gray-700);
  margin-bottom: var(--spacing-2);
}

.page-rotation-select {
  width: 100%;
  padding: var(--spacing-1) var(--spacing-2);
  font-size: var(--font-size-xs);
  border: 1px solid var(--color-gray-300);
  border-radius: var(--radius-sm);
  background: var(--color-white);
}

.page-preview-loading {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: var(--spacing-8);
  color: var(--color-gray-500);
}

.page-preview-spinner {
  width: 32px;
  height: 32px;
  border: 3px solid var(--color-gray-200);
  border-top-color: var(--color-primary);
  border-radius: 50%;
  animation: spin 1s linear infinite;
  margin-bottom: var(--spacing-3);
}

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

/* ===== Compression Level Buttons ===== */
.compression-levels {
  margin-bottom: var(--spacing-4);
}

.level-buttons {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--spacing-3);
}

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

.level-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--spacing-3) var(--spacing-4);
  background: var(--color-gray-100);
  border: 2px solid var(--color-gray-300);
  border-radius: var(--radius-lg);
  cursor: pointer;
  transition: all var(--transition-fast);
  text-align: center;
}

.level-btn input[type="radio"] {
  display: none;
}

.level-btn:hover {
  border-color: var(--color-primary-light);
  background: var(--color-gray-50);
}

.level-btn:has(input:checked) {
  border-color: var(--color-primary);
  background: rgba(79, 70, 229, 0.1);
  box-shadow: 0 0 0 2px rgba(79, 70, 229, 0.2);
}

.level-label {
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: var(--color-gray-700);
}

.level-btn:has(input:checked) .level-label {
  color: var(--color-primary);
}

.level-hint {
  margin-top: var(--spacing-2);
  font-size: var(--font-size-xs);
  color: var(--color-gray-500);
  text-align: center;
}

/* ===== Buttons - Premium Design ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-2);
  padding: var(--spacing-4) var(--spacing-8);
  font-size: var(--font-size-base);
  font-weight: 600;
  border-radius: var(--radius-xl);
  border: none;
  cursor: pointer;
  transition: all var(--transition-normal);
  position: relative;
  overflow: hidden;
}

.btn::before {
  content: "";
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg,
      transparent,
      rgba(255, 255, 255, 0.2),
      transparent);
  transition: left 0.5s;
}

.btn:hover::before {
  left: 100%;
}

.btn-primary {
  background: var(--color-accent-gradient);
  color: var(--color-white);
  box-shadow: 0 4px 15px rgba(79, 70, 229, 0.3);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(79, 70, 229, 0.4);
}

.btn-primary:active {
  transform: translateY(0);
}

.btn-primary:disabled {
  background: var(--color-gray-300);
  box-shadow: none;
  cursor: not-allowed;
  transform: none;
}

.btn-secondary {
  background: var(--color-gray-100);
  color: var(--color-gray-700);
}

.btn-secondary:hover {
  background: var(--color-gray-200);
  transform: translateY(-1px);
}

.btn-lg {
  padding: var(--spacing-5) var(--spacing-10);
  font-size: var(--font-size-lg);
}

.btn-block {
  width: 100%;
}

/* ===== Form Elements ===== */
.form-group {
  margin-bottom: var(--spacing-5);
}

.form-label {
  display: block;
  font-weight: 600;
  color: var(--color-gray-700);
  margin-bottom: var(--spacing-2);
}

.form-input,
.form-select,
.form-textarea {
  width: 100%;
  padding: var(--spacing-4);
  border: 2px solid var(--color-gray-200);
  border-radius: var(--radius-lg);
  font-size: var(--font-size-base);
  transition: all var(--transition-fast);
  background: var(--color-white);
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 4px rgba(79, 70, 229, 0.1);
}

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

/* ===== Progress Bar ===== */
.progress {
  height: 8px;
  background: var(--color-gray-200);
  border-radius: var(--radius-full);
  overflow: hidden;
  margin: var(--spacing-4) 0;
}

.progress-bar {
  height: 100%;
  background: var(--color-accent-gradient);
  border-radius: var(--radius-full);
  transition: width var(--transition-normal);
  position: relative;
}

.progress-bar::after {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(90deg,
      transparent,
      rgba(255, 255, 255, 0.3),
      transparent);
  animation: shimmer 1.5s infinite;
}

@keyframes shimmer {
  0% {
    transform: translateX(-100%);
  }

  100% {
    transform: translateX(100%);
  }
}

/* ===== Status Messages ===== */
.status {
  padding: var(--spacing-4) var(--spacing-5);
  border-radius: var(--radius-lg);
  margin: var(--spacing-4) 0;
  display: flex;
  align-items: center;
  gap: var(--spacing-3);
}

.status-success {
  background: rgba(16, 185, 129, 0.1);
  color: var(--color-success);
  border: 1px solid rgba(16, 185, 129, 0.3);
}

.status-error {
  background: rgba(239, 68, 68, 0.1);
  color: var(--color-error);
  border: 1px solid rgba(239, 68, 68, 0.3);
}

.status-info {
  background: rgba(79, 70, 229, 0.1);
  color: var(--color-primary);
  border: 1px solid rgba(79, 70, 229, 0.3);
}

/* ===== FAQ Section ===== */
.faq-section {
  margin-top: var(--spacing-12);
  padding-top: var(--spacing-10);
  border-top: 1px solid var(--color-gray-200);
}

.faq-title {
  font-size: var(--font-size-xl);
  font-weight: 700;
  color: var(--color-gray-900);
  margin-bottom: var(--spacing-6);
}

.faq-item {
  margin-bottom: var(--spacing-6);
  padding-bottom: var(--spacing-6);
  border-bottom: 1px solid var(--color-gray-100);
}

.faq-item:last-child {
  margin-bottom: 0;
  padding-bottom: 0;
  border-bottom: none;
}

.faq-question {
  font-weight: 600;
  color: var(--color-gray-800);
  margin-bottom: var(--spacing-2);
}

.faq-answer {
  color: var(--color-gray-600);
  line-height: 1.7;
}

/* ===== Related Tools ===== */
.related-tools {
  margin-top: var(--spacing-10);
  padding-top: var(--spacing-8);
  border-top: 1px solid var(--color-gray-200);
}

.related-title {
  font-size: var(--font-size-lg);
  font-weight: 600;
  color: var(--color-gray-900);
  margin-bottom: var(--spacing-4);
}

.related-list {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-3);
}

.related-link {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-2);
  padding: var(--spacing-3) var(--spacing-4);
  background: var(--color-gray-100);
  border-radius: var(--radius-lg);
  font-size: var(--font-size-sm);
  font-weight: 500;
  color: var(--color-gray-700);
  transition: all var(--transition-fast);
}

.related-link:hover {
  background: var(--color-primary);
  color: var(--color-white);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(79, 70, 229, 0.25);
}

/* ===== Sidebar ===== */
.sidebar {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-6);
}

.sidebar-card {
  background: var(--color-white);
  border: 1px solid var(--color-gray-200);
  border-radius: var(--radius-2xl);
  padding: var(--spacing-6);
  box-shadow: var(--shadow-card);
}

.sidebar-title {
  font-size: var(--font-size-lg);
  font-weight: 600;
  color: var(--color-gray-900);
  margin-bottom: var(--spacing-4);
}

.sidebar-card ul {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-3);
}

.sidebar-card li {
  display: flex;
  align-items: flex-start;
  gap: var(--spacing-2);
  color: var(--color-gray-600);
  font-size: var(--font-size-sm);
}

.sidebar-card li::before {
  content: "✓";
  color: var(--color-success);
  font-weight: 600;
  flex-shrink: 0;
}

/* ===== Features Section ===== */
.features-section {
  padding: var(--spacing-16) 0;
  background: var(--color-white);
  margin: var(--spacing-12) 0;
  border-radius: var(--radius-2xl);
}

.feature-card {
  text-align: center;
  padding: var(--spacing-6);
}

.feature-icon {
  width: 64px;
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-accent-gradient);
  border-radius: var(--radius-xl);
  font-size: 1.75rem;
  margin: 0 auto var(--spacing-4);
  color: white;
}

.feature-title {
  font-size: var(--font-size-lg);
  font-weight: 600;
  color: var(--color-gray-900);
  margin-bottom: var(--spacing-2);
}

.feature-desc {
  color: var(--color-gray-500);
  font-size: var(--font-size-sm);
  line-height: 1.6;
}

/* ===== Trust Section ===== */
.trust-section {
  padding: var(--spacing-8) 0;
  text-align: center;
}

.trust-badges {
  display: flex;
  justify-content: center;
  gap: var(--spacing-12);
  flex-wrap: wrap;
}

.trust-badge {
  text-align: center;
}

.trust-number {
  font-size: var(--font-size-3xl);
  font-weight: 700;
  background: var(--color-accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.trust-label {
  font-size: var(--font-size-sm);
  color: var(--color-gray-500);
  margin-top: var(--spacing-1);
}

/* ===== Privacy Section ===== */
.privacy-section {
  padding: var(--spacing-12) 0;
  background: linear-gradient(180deg, var(--color-gray-50), var(--color-white));
  margin: var(--spacing-8) 0;
  border-radius: var(--radius-2xl);
}

.privacy-intro {
  text-align: center;
  max-width: 700px;
  margin: 0 auto var(--spacing-8);
  color: var(--color-gray-600);
  font-size: var(--font-size-lg);
  line-height: 1.7;
}

.privacy-points {
  display: flex;
  justify-content: center;
  gap: var(--spacing-8);
  flex-wrap: wrap;
}

.privacy-point {
  display: flex;
  align-items: center;
  gap: var(--spacing-3);
  padding: var(--spacing-4) var(--spacing-6);
  background: var(--color-white);
  border: 1px solid var(--color-gray-200);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-fast);
}

.privacy-point:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.privacy-icon {
  font-size: 1.5rem;
}

/* ===== Popular Tools Section ===== */
.popular-section {
  padding: var(--spacing-12) 0;
}

.popular-tools {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: var(--spacing-4);
}

.popular-tool-link {
  display: flex;
  align-items: center;
  gap: var(--spacing-3);
  padding: var(--spacing-4) var(--spacing-6);
  background: var(--color-white);
  border: 1px solid var(--color-gray-200);
  border-radius: var(--radius-xl);
  font-weight: 500;
  color: var(--color-gray-700);
  transition: all var(--transition-normal);
  box-shadow: var(--shadow-sm);
}

.popular-tool-link:hover {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: var(--color-white);
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg), 0 0 20px rgba(79, 70, 229, 0.3);
}

.popular-tool-icon {
  font-size: 1.25rem;
}

.popular-tool-name {
  font-size: var(--font-size-sm);
}

/* Dark mode for new sections */
[data-theme="dark"] .privacy-section {
  background: linear-gradient(180deg, #1e293b, #0f172a);
}

[data-theme="dark"] .privacy-point,
[data-theme="dark"] .popular-tool-link {
  background: #1e293b;
  border-color: #334155;
  color: #e2e8f0;
}

[data-theme="dark"] .privacy-point:hover,
[data-theme="dark"] .popular-tool-link:hover {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: #ffffff;
}

/* ===== Static Pages ===== */
.page-content {
  max-width: 800px;
  margin: 0 auto;
  background: var(--color-white);
  padding: var(--spacing-10);
  border-radius: var(--radius-2xl);
  box-shadow: var(--shadow-card);
}

.page-title {
  font-size: var(--font-size-3xl);
  font-weight: 700;
  color: var(--color-gray-900);
  margin-bottom: var(--spacing-6);
}

.page-section {
  margin-bottom: var(--spacing-8);
}

.page-section h2 {
  font-size: var(--font-size-xl);
  font-weight: 600;
  color: var(--color-gray-800);
  margin-bottom: var(--spacing-4);
}

.page-section p {
  color: var(--color-gray-600);
  margin-bottom: var(--spacing-4);
  line-height: 1.7;
}

.page-section ul {
  padding-left: var(--spacing-6);
  margin-bottom: var(--spacing-4);
}

.page-section li {
  color: var(--color-gray-600);
  margin-bottom: var(--spacing-2);
  list-style: disc;
}

/* ===== Footer ===== */
.footer {
  background: var(--color-gray-900);
  color: var(--color-gray-400);
  padding: var(--spacing-16) 0 var(--spacing-8);
  margin-top: auto;
}

.footer-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--spacing-10);
  margin-bottom: var(--spacing-10);
}

.footer-brand .logo {
  color: var(--color-white);
  margin-bottom: var(--spacing-4);
}

.footer-brand .logo-text {
  background: none;
  -webkit-text-fill-color: white;
}

.footer-brand p {
  font-size: var(--font-size-sm);
  line-height: 1.6;
}

.footer-links h4 {
  color: var(--color-white);
  font-size: var(--font-size-base);
  font-weight: 600;
  margin-bottom: var(--spacing-5);
}

.footer-links li {
  margin-bottom: var(--spacing-3);
}

.footer-links a {
  font-size: var(--font-size-sm);
  transition: all var(--transition-fast);
  display: inline-block;
}

.footer-links a:hover {
  color: var(--color-white);
  transform: translateX(4px);
}

.footer-bottom {
  padding-top: var(--spacing-8);
  border-top: 1px solid var(--color-gray-800);
  text-align: center;
  font-size: var(--font-size-sm);
}

.footer-bottom p {
  margin-bottom: var(--spacing-2);
}

/* ===== Loading Spinner ===== */
.spinner {
  width: 40px;
  height: 40px;
  border: 3px solid var(--color-gray-200);
  border-top-color: var(--color-primary);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
  margin: var(--spacing-4) auto;
}

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

/* ===== Responsive ===== */
@media (max-width: 768px) {
  .nav-menu {
    display: none;
    position: absolute;
    top: 64px;
    left: 0;
    right: 0;
    background: var(--color-white);
    flex-direction: column;
    padding: var(--spacing-4);
    border-bottom: 1px solid var(--color-gray-200);
    box-shadow: var(--shadow-lg);
  }

  .nav-menu.active {
    display: flex;
  }

  .nav-toggle {
    display: flex;
  }

  .hero {
    padding: var(--spacing-8) 0 var(--spacing-12);
  }

  .hero-title {
    font-size: var(--font-size-3xl);
  }

  .hero-subtitle {
    font-size: var(--font-size-base);
  }

  .tools-grid {
    grid-template-columns: 1fr;
    gap: var(--spacing-4);
  }

  .tool-page {
    grid-template-columns: 1fr;
  }

  .tool-content {
    padding: var(--spacing-6);
  }

  .upload-zone {
    padding: var(--spacing-8);
  }

  .trust-badges {
    gap: var(--spacing-6);
  }

  .page-content {
    padding: var(--spacing-6);
    margin: 0 var(--spacing-4);
  }
}

/* ===== Utilities ===== */
.text-center {
  text-align: center;
}

.text-left {
  text-align: left;
}

.text-right {
  text-align: right;
}

.mt-4 {
  margin-top: var(--spacing-4);
}

.mt-6 {
  margin-top: var(--spacing-6);
}

.mt-8 {
  margin-top: var(--spacing-8);
}

.mb-4 {
  margin-bottom: var(--spacing-4);
}

.mb-6 {
  margin-bottom: var(--spacing-6);
}

.hidden {
  display: none !important;
}

.visible {
  display: block !important;
}

/* ===== Dark Mode ===== */
[data-theme="dark"] {
  --color-white: #0f172a;
  --color-gray-50: #1e293b;
  --color-gray-100: #334155;
  --color-gray-200: #475569;
  --color-gray-300: #64748b;
  --color-gray-400: #94a3b8;
  --color-gray-500: #cbd5e1;
  --color-gray-600: #e2e8f0;
  --color-gray-700: #f1f5f9;
  --color-gray-800: #f8fafc;
  --color-gray-900: #ffffff;
}

[data-theme="dark"] body {
  background-color: #0f172a;
}

[data-theme="dark"] .header {
  background: rgba(30, 41, 59, 0.95);
  border-color: #334155;
}

[data-theme="dark"] .logo-text {
  background: var(--color-accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

[data-theme="dark"] .tool-card,
[data-theme="dark"] .tool-content,
[data-theme="dark"] .sidebar-card,
[data-theme="dark"] .page-content {
  background: #1e293b;
  border-color: #334155;
}

[data-theme="dark"] .tool-card:hover {
  border-color: var(--color-primary);
  box-shadow: var(--shadow-card), 0 0 30px rgba(79, 70, 229, 0.2);
}

[data-theme="dark"] .upload-zone {
  background: linear-gradient(180deg, #1e293b, #0f172a);
  border-color: #475569;
}

[data-theme="dark"] .upload-zone:hover,
[data-theme="dark"] .upload-zone.dragover {
  border-color: var(--color-primary);
}

[data-theme="dark"] .file-item {
  background: #334155;
  border-color: #475569;
}

[data-theme="dark"] .form-input,
[data-theme="dark"] .form-select,
[data-theme="dark"] .form-textarea {
  background: #1e293b;
  border-color: #475569;
  color: #f8fafc;
}

[data-theme="dark"] .ad-container {
  background: #1e293b;
}

[data-theme="dark"] .ad-placeholder {
  background: #334155;
}

[data-theme="dark"] .related-link {
  background: #334155;
  color: #e2e8f0;
}

[data-theme="dark"] .related-link:hover {
  background: var(--color-primary);
  color: #ffffff;
}

[data-theme="dark"] .nav-menu {
  background: #1e293b;
  border-color: #334155;
}

[data-theme="dark"] .faq-section,
[data-theme="dark"] .related-tools {
  border-color: #334155;
}

[data-theme="dark"] .faq-item {
  border-color: #475569;
}

[data-theme="dark"] .lang-switch,
[data-theme="dark"] .theme-toggle {
  background: #334155;
  color: #e2e8f0;
}

[data-theme="dark"] .lang-switch:hover {
  background: var(--color-primary);
}

[data-theme="dark"] .theme-toggle:hover {
  background: #475569;
}

[data-theme="dark"] .theme-icon-light {
  display: none;
}

[data-theme="dark"] .theme-icon-dark {
  display: block;
  font-size: 1.25rem;
}

[data-theme="dark"] .btn-secondary {
  background: #334155;
  color: #e2e8f0;
}

[data-theme="dark"] .btn-secondary:hover {
  background: #475569;
}

[data-theme="dark"] .features-section {
  background: #1e293b;
}

[data-theme="dark"] .tool-icon {
  background: linear-gradient(135deg, #334155, #1e293b);
}

[data-theme="dark"] .hero::before {
  background: radial-gradient(circle,
      rgba(79, 70, 229, 0.15) 0%,
      transparent 70%);
}

/* Page Preview Dark Mode */
[data-theme="dark"] .page-preview-container {
  background: #1e293b;
  border-color: #334155;
}

[data-theme="dark"] .page-preview-title {
  color: #e2e8f0;
}

[data-theme="dark"] .page-preview-item {
  background: #334155;
  border-color: #475569;
}

[data-theme="dark"] .page-preview-item:hover {
  border-color: var(--color-primary-light);
}

[data-theme="dark"] .page-preview-item.selected {
  background: rgba(79, 70, 229, 0.15);
}

[data-theme="dark"] .page-preview-label {
  color: #e2e8f0;
}

[data-theme="dark"] .page-preview-img {
  background: #1e293b;
}

[data-theme="dark"] .page-rotation-select {
  background: #1e293b;
  border-color: #475569;
  color: #f8fafc;
}

[data-theme="dark"] .page-rotation-select option {
  background: #1e293b;
  color: #f8fafc;
}

[data-theme="dark"] .btn-add-files {
  background: #334155;
  border-color: #475569;
  color: #e2e8f0;
}

[data-theme="dark"] .btn-add-files:hover {
  background: var(--color-primary-light);
  border-color: var(--color-primary);
  color: white;
}

[data-theme="dark"] .file-thumbnail-pdf {
  background: linear-gradient(135deg, #ef4444, #dc2626);
}

/* Compression Level Buttons Dark Mode */
[data-theme="dark"] .level-btn {
  background: #334155;
  border-color: #475569;
}

[data-theme="dark"] .level-btn:hover {
  border-color: var(--color-primary-light);
  background: #3b4a5f;
}

[data-theme="dark"] .level-btn:has(input:checked) {
  background: rgba(79, 70, 229, 0.2);
  border-color: var(--color-primary);
}

[data-theme="dark"] .level-label {
  color: #e2e8f0;
}

[data-theme="dark"] .level-btn:has(input:checked) .level-label {
  color: var(--color-primary-light);
}

[data-theme="dark"] .level-hint {
  color: #94a3b8;
}