:root {
  --primary-color: rgb(0, 63, 189);
  --accent-color: rgba(0, 36, 58, 1);
  --base-color: #fff;
  --font-family: 'Inter Tight', sans-serif;
  --text-primary: #1a1a1a;
  --text-secondary: #666;
  --text-muted: #999;
  --border-light: #e5e5e5;
  --border-medium: #d0d0d0;
  --shadow-light: 0 2px 8px rgba(0, 0, 0, 0.08);
  --shadow-medium: 0 4px 16px rgba(0, 0, 0, 0.12);
  --shadow-heavy: 0 8px 32px rgba(0, 0, 0, 0.16);
  --radius-small: 8px;
  --radius-medium: 12px;
  --radius-large: 16px;
  --transition-fast: 0.2s ease;
  --transition-medium: 0.3s ease;
  --transition-slow: 0.5s ease;
}

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

body {
  font-family: var(--font-family);
  line-height: 1.6;
  color: var(--text-primary);
  background: var(--base-color);
  overflow-x: hidden;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

/* Header & Navigation */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  background: rgba(255, 255, 255, 0.6);
  backdrop-filter: blur(10px);
  z-index: 1000;
  transition: var(--transition-medium);
}

.header .container {
  display: flex;
  align-items: center;
  height: 60px;
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
}

.logo {
  display: flex;
  align-items: center;
  gap: 5px;
  color: var(--primary-color);
  font-weight: 600;
  font-size: 20px;
}

.logo svg {
  color: var(--primary-color);
}

.nav-menu {
  display: flex;
  gap: 15px;
  align-items: center;
}

.nav-link {
  color: var(--accent-color);
  text-decoration: none;
  font-weight: 300;
  transition: var(--transition-fast);
  position: relative;
}

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

.nav-link.active::after {
  content: '';
  position: absolute;
  bottom: -8px;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--primary-color);
  border-radius: 1px;
}

.mobile-menu-btn {
  display: none;
  flex-direction: column;
  gap: 4px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
}

.mobile-menu-btn span {
  width: 24px;
  height: 2px;
  background: var(--text-primary);
  transition: var(--transition-fast);
}

/* Main */
.main {
  margin-top: 72px;
}

/* Page Hero */
.page-hero {
  padding: 80px 0 60px;
  text-align: center;
  background: linear-gradient(135deg, rgba(0, 154, 218, 0.02) 0%, rgba(0, 36, 58, 0.02) 100%);
}

.page-hero-content {
  max-width: 600px;
  margin: 0 auto;
  opacity: 0;
  transform: translateY(30px);
  animation: fadeInUp 0.8s ease forwards;
}

.page-hero-content h1 {
  font-size: clamp(2.5rem, 5vw, 3.5rem);
  font-weight: 500;
  color: var(--accent-color);
  margin-bottom: 20px;
  line-height: 1.2;
}

.page-hero-content p {
  font-size: 1.2rem;
  color: var(--text-secondary);
  font-weight: 400;
  line-height: 1.6;
}

/* Hero Section */
.hero {
  padding: 80px 0 60px;
  text-align: center;
  background: linear-gradient(135deg, rgba(0, 154, 218, 0.02) 0%, rgba(0, 36, 58, 0.02) 100%);
}

.hero-content {
  max-width: 600px;
  margin: 0 auto;
  opacity: 0;
  transform: translateY(30px);
  animation: fadeInUp 0.8s ease forwards;
}

.hero-title {
  font-size: clamp(2.5rem, 5vw, 3.5rem);
  font-weight: 500;
  color: var(--accent-color);
  margin-bottom: 20px;
  line-height: 1.2;
}

.hero-subtitle {
  font-size: 1.2rem;
  color: var(--text-secondary);
  font-weight: 200;
  line-height: 1.6;
  margin-bottom: 32px;
}

.hero-buttons {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}

/* Upload Section */
.upload-section {
  padding: 60px 0;
}

.upload-area {
  position: relative;
  border: 2px dashed var(--border-medium);
  border-radius: var(--radius-large);
  padding: 60px 40px;
  text-align: center;
  background: var(--base-color);
  transition: var(--transition-medium);
  cursor: pointer;
  margin-bottom: 40px;
}

.upload-area:hover {
  border-color: var(--primary-color);
  background: rgba(0, 154, 218, 0.02);
  transform: translateY(-2px);
  box-shadow: var(--shadow-medium);
}

.upload-area.drag-over {
  border-color: var(--primary-color);
  background: rgba(0, 154, 218, 0.05);
  transform: scale(1.02);
}

.upload-content {
  position: relative;
  z-index: 2;
}

.upload-icon {
  color: var(--primary-color);
  margin-bottom: 20px;
}

.upload-area h3 {
  font-size: 1.5rem;
  font-weight: 500;
  color: var(--text-primary);
  margin-bottom: 8px;
}

.upload-area p {
  color: var(--text-secondary);
  font-size: 1rem;
}

.browse-btn {
  background: none;
  border: none;
  color: var(--primary-color);
  font-weight: 600;
  cursor: pointer;
  text-decoration: underline;
  font-size: inherit;
  font-family: inherit;
  transition: var(--transition-fast);
}

.browse-btn:hover {
  color: var(--accent-color);
}

.upload-overlay {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 154, 218, 0.1);
  border-radius: var(--radius-large);
  opacity: 0;
  transition: var(--transition-fast);
  pointer-events: none;
}

/* File List */
.file-list {
  margin-bottom: 40px;
}

.file-item {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 20px;
  background: var(--base-color);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-medium);
  margin-bottom: 12px;
  box-shadow: var(--shadow-light);
  transition: var(--transition-medium);
  cursor: grab;
  opacity: 0;
  transform: translateX(-20px);
  animation: slideInLeft 0.4s ease forwards;
}

.file-item:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-medium);
}

.file-item.dragging {
  opacity: 0.5;
  transform: rotate(5deg);
  cursor: grabbing;
}

.file-icon {
  flex-shrink: 0;
  width: 40px;
  height: 40px;
  background: rgba(0, 154, 218, 0.1);
  border-radius: var(--radius-small);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary-color);
}

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

.file-name {
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 4px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 100%;
  display: block;
}

.file-size {
  font-size: 0.9rem;
  color: var(--text-secondary);
}

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

.file-action-btn {
  width: 32px;
  height: 32px;
  border: none;
  background: none;
  border-radius: var(--radius-small);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition-fast);
  color: var(--text-muted);
}

.file-action-btn:hover {
  background: rgba(0, 0, 0, 0.05);
  color: var(--text-primary);
}

.file-action-btn.remove:hover {
  background: rgba(220, 53, 69, 0.1);
  color: #dc3545;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 28px;
  border: none;
  border-radius: var(--radius-medium);
  font-family: var(--font-family);
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition-medium);
  text-decoration: none;
  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: var(--transition-medium);
}

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

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

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-medium);
}

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

.btn-secondary:hover {
  background: rgba(0, 0, 0, 0.02);
  border-color: var(--border-medium);
  transform: translateY(-1px);
}

.btn-success {
  background: #28a745;
  color: white;
  box-shadow: var(--shadow-light);
}

.btn-success:hover {
  background: #218838;
  transform: translateY(-2px);
  box-shadow: var(--shadow-medium);
}

/* Controls */
.merge-controls {
  display: flex;
  gap: 16px;
  align-items: center;
  justify-content: center;
  margin-bottom: 40px;
  opacity: 0;
  transform: translateY(20px);
  animation: fadeInUp 0.5s ease forwards;
}

/* Progress */
.progress-container {
  text-align: center;
  margin-bottom: 40px;
}

.progress-bar {
  width: 100%;
  height: 8px;
  background: var(--border-light);
  border-radius: 4px;
  overflow: hidden;
  margin-bottom: 16px;
}

.progress-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--primary-color), rgba(0, 154, 218, 0.8));
  border-radius: 4px;
  width: 0%;
  transition: width 0.3s ease;
}

.progress-text {
  color: var(--text-secondary);
  font-weight: 500;
}

/* Download */
.download-container {
  display: flex;
  gap: 16px;
  justify-content: center;
  margin-bottom: 40px;
  opacity: 0;
  transform: translateY(20px);
  animation: fadeInUp 0.5s ease forwards;
}

/* Features Section */
.features {
  padding: 80px 0;
  background: rgba(0, 36, 58, 0.02);
}

.section-title {
  text-align: center;
  font-size: 2.5rem;
  font-weight: 500;
  color: var(--accent-color);
  margin-bottom: 60px;
  opacity: 0;
  transform: translateY(30px);
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 40px;
}

.feature-card {
  text-align: center;
  padding: 40px 20px;
  background: var(--base-color);
  border-radius: var(--radius-large);
  box-shadow: var(--shadow-light);
  transition: var(--transition-medium);
  opacity: 0;
  transform: translateY(30px);
}

.feature-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-heavy);
}

.feature-icon {
  width: 64px;
  height: 64px;
  background: rgba(0, 154, 218, 0.1);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 24px;
  color: var(--primary-color);
}

.feature-card h3 {
  font-size: 1.5rem;
  font-weight: 500;
  color: var(--accent-color);
  margin-bottom: 16px;
}

.feature-card p {
  color: var(--text-secondary);
  line-height: 1.6;
}

/* Story Section */
.story-section {
  padding: 80px 0;
}

.story-content {
  max-width: 800px;
  margin: 0 auto;
  text-align: center;
}

.story-content h2 {
  font-size: 2.5rem;
  font-weight: 500;
  color: var(--accent-color);
  margin-bottom: 24px;
}

.story-content p {
  font-size: 1.2rem;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 32px;
}

/* Privacy Note */
.privacy-note {
  padding: 60px 0;
}

.privacy-content {
  max-width: 800px;
  margin: 0 auto;
  text-align: center;
  padding: 40px;
  background: rgba(0, 154, 218, 0.02);
  border-radius: var(--radius-large);
  border: 1px solid rgba(0, 154, 218, 0.1);
}

.privacy-content h3 {
  font-size: 1.8rem;
  font-weight: 500;
  color: var(--accent-color);
  margin-bottom: 16px;
}

.privacy-content p {
  color: var(--text-secondary);
  font-size: 1.1rem;
  line-height: 1.6;
}

/* About Page Styles */
.about-content {
  padding: 60px 0;
}

.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
  margin-bottom: 80px;
}

.about-grid.reverse {
  direction: rtl;
}

.about-grid.reverse .about-text {
  direction: ltr;
}

.about-text h2 {
  font-size: 2rem;
  font-weight: 500;
  color: var(--accent-color);
  margin-bottom: 24px;
}

.about-text p {
  font-size: 1.1rem;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 20px;
}

.about-text ul {
  margin-left: 20px;
  margin-bottom: 20px;
}

.about-text li {
  color: var(--text-secondary);
  margin-bottom: 8px;
}

.about-image {
  display: flex;
  justify-content: center;
  align-items: center;
}

.image-placeholder {
  width: 200px;
  height: 200px;
  background: rgba(0, 154, 218, 0.1);
  border-radius: var(--radius-large);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary-color);
}

.creator-section {
  margin-bottom: 80px;
}

.creator-section h2 {
  font-size: 2rem;
  font-weight: 500;
  color: var(--accent-color);
  text-align: center;
  margin-bottom: 40px;
}

.creator-card {
  display: flex;
  gap: 32px;
  align-items: center;
  max-width: 600px;
  margin: 0 auto;
  padding: 40px;
  background: var(--base-color);
  border-radius: var(--radius-large);
  box-shadow: var(--shadow-light);
}

.creator-avatar {
  flex-shrink: 0;
  width: 80px;
  height: 80px;
  background: rgba(0, 154, 218, 0.1);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary-color);
}

.creator-info h3 {
  font-size: 1.5rem;
  font-weight: 500;
  color: var(--accent-color);
  margin-bottom: 8px;
}

.creator-title {
  color: var(--primary-color);
  font-weight: 500;
  margin-bottom: 16px;
}

.creator-info p {
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 12px;
}

.mission-section {
  margin-bottom: 80px;
}

.mission-section h2 {
  font-size: 2rem;
  font-weight: 500;
  color: var(--accent-color);
  text-align: center;
  margin-bottom: 24px;
}

.mission-section > p {
  text-align: center;
  font-size: 1.1rem;
  color: var(--text-secondary);
  margin-bottom: 40px;
}

.mission-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 32px;
}

.mission-item {
  text-align: center;
  padding: 32px 20px;
  background: var(--base-color);
  border-radius: var(--radius-large);
  box-shadow: 0 3px 5px rgba(0, 0, 0, 0.12);
}

.mission-item h3 {
  font-size: 1.3rem;
  font-weight: 600;
  color: var(--accent-color);
  margin-bottom: 16px;
}

.mission-item p {
  color: var(--text-secondary);
  line-height: 1.6;
}

/* How It Works Page Styles */
.how-it-works-content {
  padding: 60px 0;
}

.process-overview {
  text-align: center;
  margin-bottom: 60px;
}

.process-overview h2 {
  font-size: 2rem;
  font-weight: 500;
  color: var(--accent-color);
  margin-bottom: 16px;
}

.process-overview p {
  font-size: 1.1rem;
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto;
}

.steps-container {
  margin-bottom: 80px;
}

.step {
  display: flex;
  gap: 32px;
  align-items: flex-start;
  margin-bottom: 48px;
  opacity: 0;
  transform: translateY(30px);
  animation: fadeInUp 0.6s ease forwards;
}

.step:nth-child(even) {
  flex-direction: row-reverse;
}

.step-number {
  flex-shrink: 0;
  width: 48px;
  height: 48px;
  background: var(--primary-color);
  color: white;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 1.2rem;
}

.step-content h3 {
  font-size: 1.5rem;
  font-weight: 500;
  color: var(--accent-color);
  margin-bottom: 16px;
}

.step-content p {
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 16px;
}

.step-features {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.feature-tag {
  background: rgba(0, 154, 218, 0.1);
  color: var(--primary-color);
  padding: 4px 12px;
  border-radius: 20px;
  font-size: 0.9rem;
  font-weight: 500;
}

.technical-details {
  margin-bottom: 80px;
}

.technical-details h2 {
  font-size: 2rem;
  font-weight: 700;
  color: var(--accent-color);
  text-align: center;
  margin-bottom: 40px;
}

.tech-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 32px;
}

.tech-card {
  padding: 32px;
  background: var(--base-color);
  border-radius: var(--radius-large);
  box-shadow: var(--shadow-light);
}

.tech-card h3 {
  font-size: 1.3rem;
  font-weight: 600;
  color: var(--accent-color);
  margin-bottom: 16px;
}

.tech-card p {
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 16px;
}

.tech-card ul {
  margin-left: 20px;
}

.tech-card li {
  color: var(--text-secondary);
  margin-bottom: 8px;
}

.features-explained {
  margin-bottom: 80px;
}

.features-explained h2 {
  font-size: 2rem;
  font-weight: 500;
  color: var(--accent-color);
  text-align: center;
  margin-bottom: 40px;
}

.features-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 32px;
}

.feature-item {
  display: flex;
  gap: 16px;
  align-items: flex-start;
}

.feature-icon {
  flex-shrink: 0;
  width: 48px;
  height: 48px;
  background: rgba(0, 154, 218, 0.1);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary-color);
}

.feature-text h3 {
  font-size: 1.2rem;
  font-weight: 500;
  color: var(--accent-color);
  margin-bottom: 8px;
}

.feature-text p {
  color: var(--text-secondary);
  line-height: 1.6;
}

.compatibility-section {
  margin-bottom: 80px;
}

.compatibility-section h2 {
  font-size: 2rem;
  font-weight: 500;
  color: var(--accent-color);
  text-align: center;
  margin-bottom: 16px;
}

.compatibility-section > p {
  text-align: center;
  color: var(--text-secondary);
  margin-bottom: 32px;
}

.browser-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 16px;
}

.browser-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  border: 1px solid rgba(0, 36, 58, 0.3);
  padding: 16px 24px;
  background: var(--base-color);
  border-radius: var(--radius-medium);
  box-shadow: var(--shadow-light);
}

.browser-name {
  font-weight: 500;
  color: var(--accent-color);
}

.browser-version {
  color: var(--text-secondary);
  font-size: 0.9rem;
}

/* Privacy Page Styles */
.privacy-content {
  padding: 60px 0;
}

.privacy-intro {
  text-align: center;
  margin-bottom: 60px;
}

.privacy-intro h2 {
  font-size: 2rem;
  font-weight: 500;
  color: var(--accent-color);
  margin-bottom: 16px;
}

.privacy-intro p {
  font-size: 1.1rem;
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto;
}

.privacy-principles {
  margin-bottom: 80px;
}

.privacy-principles h2 {
  font-size: 2rem;
  font-weight: 500;
  color: var(--accent-color);
  text-align: center;
  margin-bottom: 40px;
}

.principles-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 32px;
}

.principle-card {
  text-align: center;
  padding: 40px 20px;
  background: var(--base-color);
  border-radius: var(--radius-large);
  box-shadow: var(--shadow-light);
}

.principle-icon {
  width: 64px;
  height: 64px;
  background: rgba(0, 154, 218, 0.1);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 24px;
  color: var(--primary-color);
}

.principle-card h3 {
  font-size: 1.3rem;
  font-weight: 500;
  color: var(--accent-color);
  margin-bottom: 16px;
}

.principle-card p {
  color: var(--text-secondary);
  line-height: 1.6;
}

.how-it-works-privacy {
  margin-bottom: 80px;
}

.how-it-works-privacy h2 {
  font-size: 2rem;
  font-weight: 500;
  color: var(--accent-color);
  text-align: center;
  margin-bottom: 40px;
}

.privacy-steps {
  max-width: 800px;
  margin: 0 auto;
}

.privacy-step {
  display: flex;
  gap: 24px;
  align-items: flex-start;
  margin-bottom: 32px;
}

.privacy-step .step-content h3 {
  font-size: 1.3rem;
  font-weight: 500;
  color: var(--accent-color);
  margin-bottom: 12px;
}

.privacy-step .step-content p {
  color: var(--text-secondary);
  line-height: 1.6;
}

.data-policy {
  margin-bottom: 80px;
}

.data-policy h2 {
  font-size: 2rem;
  font-weight: 500;
  color: var(--accent-color);
  text-align: center;
  margin-bottom: 40px;
}

.data-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 32px;
}

.data-item {
  padding: 32px 20px;
  background: var(--base-color);
  border-radius: var(--radius-large);
  box-shadow: var(--shadow-light);
  text-align: center;
}

.data-item h3 {
  font-size: 1.2rem;
  font-weight: 500;
  color: var(--accent-color);
  margin-bottom: 16px;
}

.data-item p {
  color: var(--text-secondary);
  line-height: 1.6;
}

.security-measures {
  margin-bottom: 80px;
}

.security-measures h2 {
  font-size: 2rem;
  font-weight: 500;
  color: var(--accent-color);
  text-align: center;
  margin-bottom: 40px;
}

.security-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 32px;
}

.security-card {
  padding: 32px;
  background: var(--base-color);
  border-radius: var(--radius-large);
  box-shadow: var(--shadow-light);
}

.security-card h3 {
  font-size: 1.3rem;
  font-weight: 500;
  color: var(--accent-color);
  margin-bottom: 16px;
}

.security-card p {
  color: var(--text-secondary);
  line-height: 1.6;
}

.third-party-services {
  margin-bottom: 80px;
}

.third-party-services h2 {
  font-size: 2rem;
  font-weight: 500;
  color: var(--accent-color);
  text-align: center;
  margin-bottom: 24px;
}

.third-party-services p {
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 16px;
}

.third-party-services ul {
  margin-left: 20px;
  margin-bottom: 16px;
}

.third-party-services li {
  color: var(--text-secondary);
  margin-bottom: 8px;
}

.privacy-commitment {
  margin-bottom: 80px;
  text-align: center;
}

.privacy-commitment h2 {
  font-size: 2rem;
  font-weight: 500;
  color: var(--accent-color);
  margin-bottom: 24px;
}

.privacy-commitment p {
  font-size: 1.1rem;
  color: var(--text-secondary);
  line-height: 1.6;
  max-width: 800px;
  margin: 0 auto;
}

.contact-privacy {
  text-align: center;
  margin-bottom: 80px;
}

.contact-privacy h2 {
  font-size: 2rem;
  font-weight: 500;
  color: var(--accent-color);
  margin-bottom: 16px;
}

.contact-privacy p {
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 24px;
}

/* Contact Page Styles */
.contact-content {
  padding: 60px 0;
}

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  margin-bottom: 80px;
}

.contact-info h2 {
  font-size: 2rem;
  font-weight: 500;
  color: var(--accent-color);
  margin-bottom: 24px;
}

.contact-info > p {
  font-size: 1.1rem;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 40px;
}

.contact-methods {
  display: flex;
  flex-direction: column;
  gap: 32px;
}

.contact-method {
  display: flex;
  gap: 16px;
  align-items: flex-start;
}

.method-icon {
  flex-shrink: 0;
  width: 48px;
  height: 48px;
  background: rgba(0, 154, 218, 0.1);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary-color);
}

.method-content h3 {
  font-size: 1.2rem;
  font-weight: 500;
  color: var(--accent-color);
  margin-bottom: 4px;
}

.method-content p {
  color: var(--text-secondary);
  margin-bottom: 8px;
}

.contact-link {
  color: var(--primary-color);
  text-decoration: none;
  font-weight: 500;
  transition: var(--transition-fast);
}

.contact-link:hover {
  color: var(--accent-color);
}

.contact-form-container {
  display: flex;
  justify-content: center;
}

.contact-form {
  width: 100%;
  max-width: 500px;
  padding: 40px;
  background: var(--base-color);
  border-radius: var(--radius-large);
  box-shadow: var(--shadow-light);
}

.contact-form h2 {
  font-size: 1.8rem;
  font-weight: 500;
  color: var(--accent-color);
  margin-bottom: 32px;
  text-align: center;
}

.form {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.form-group label {
  font-weight: 500;
  color: var(--accent-color);
}

.form-group input,
.form-group select,
.form-group textarea {
  padding: 12px 16px;
  border: 1px solid var(--border-medium);
  border-radius: var(--radius-small);
  font-family: var(--font-family);
  font-size: 1rem;
  transition: var(--transition-fast);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--primary-color);
  box-shadow: 0 0 0 3px rgba(0, 154, 218, 0.1);
}

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

.checkbox-label {
  display: flex;
  align-items: center;
  gap: 12px;
  cursor: pointer;
  font-size: 0.9rem;
  color: var(--text-secondary);
}

.checkbox-label input[type="checkbox"] {
  display: none;
}

.checkmark {
  width: 20px;
  height: 20px;
  border: 2px solid var(--border-medium);
  border-radius: 4px;
  position: relative;
  transition: var(--transition-fast);
}

.checkbox-label input[type="checkbox"]:checked + .checkmark {
  background: var(--primary-color);
  border-color: var(--primary-color);
}

.checkbox-label input[type="checkbox"]:checked + .checkmark::after {
  content: '';
  position: absolute;
  left: 6px;
  top: 2px;
  width: 6px;
  height: 10px;
  border: solid white;
  border-width: 0 2px 2px 0;
  transform: rotate(45deg);
}

.faq-section {
  margin-bottom: 80px;
}

.faq-section h2 {
  font-size: 2rem;
  font-weight: 500;
  color: var(--accent-color);
  text-align: center;
  margin-bottom: 40px;
}

.faq-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
  gap: 32px;
}

.faq-item {
  padding: 32px;
  background: var(--base-color);
  border-radius: var(--radius-large);
  box-shadow: var(--shadow-light);
}

.faq-item h3 {
  font-size: 1.2rem;
  font-weight: 500;
  color: var(--accent-color);
  margin-bottom: 16px;
}

.faq-item p {
  color: var(--text-secondary);
  line-height: 1.6;
}

.feedback-section {
  margin-bottom: 80px;
  text-align: center;
}

.feedback-section h2 {
  font-size: 2rem;
  font-weight: 500;
  color: var(--accent-color);
  margin-bottom: 24px;
}

.feedback-section p {
  font-size: 1.1rem;
  color: var(--text-secondary);
  line-height: 1.6;
  max-width: 800px;
  margin: 0 auto 40px;
}

.feedback-stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 32px;
  max-width: 500px;
  margin: 0 auto;
}

.stat-item {
  padding: 24px;
  background: var(--base-color);
  border-radius: var(--radius-large);
  box-shadow: var(--shadow-light);
}

.stat-item h3 {
  font-size: 2.5rem;
  font-weight: 500;
  color: var(--primary-color);
  margin-bottom: 8px;
}

.stat-item p {
  color: var(--text-secondary);
  font-weight: 500;
}

/* CTA Section */
.cta-section {
  padding: 80px 0;
  background: rgba(0, 36, 58, 0.02);
}

.cta-content {
  text-align: center;
  max-width: 600px;
  margin: 0 auto;
}

.cta-content h2 {
  font-size: 2.5rem;
  font-weight: 500;
  color: var(--accent-color);
  margin-bottom: 16px;
}

.cta-content p {
  font-size: 1.2rem;
  color: var(--text-secondary);
  margin-bottom: 32px;
}

/* Footer */
.footer {
  padding: 60px 0 40px;
  border-top: 1px solid var(--border-light);
  background: rgba(0, 36, 58, 0.02);
}

.footer-content {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 40px;
  margin-bottom: 40px;
}

.footer-section h4 {
  font-size: 1.2rem;
  font-weight: 500;
  color: var(--accent-color);
  margin-bottom: 16px;
}

.footer-section p {
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 8px;
}

.footer-section a {
  color: var(--text-secondary);
  text-decoration: none;
  transition: var(--transition-fast);
  display: block;
  margin-bottom: 8px;
}

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

.footer-bottom {
  text-align: center;
  padding-top: 24px;
  border-top: 1px solid var(--border-light);
}

.footer-bottom p {
  color: var(--text-muted);
  font-size: 0.9rem;
}

.social-links {
  display: flex;
  justify-content: center;
  gap: 16px;
  align-items: center;
  justify-content: start;
}

.social-links img{
  transition: var(--transition-fast);
  cursor: pointer;
}

.social-links img:hover{
  transform: scale(1.1);
}






/* Animations */
@keyframes fadeInUp {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes slideInLeft {
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes pulse {
  0%, 100% {
    transform: scale(1);
  }
  50% {
    transform: scale(1.05);
  }
}

/* Responsive Design */
@media (max-width: 768px) {
  .container {
    padding: 0 16px;
  }
  
  .nav-menu {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(10px);
    border-top: 1px solid var(--border-light);
    padding: 20px;
    flex-direction: column;
    gap: 16px;
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.1);
  }
  
  .nav-menu.active {
    display: flex;
  }
  
  .mobile-menu-btn {
    display: flex;
  }
  
  .mobile-menu-btn.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
  }
  
  .mobile-menu-btn.active span:nth-child(2) {
    opacity: 0;
  }
  
  .mobile-menu-btn.active span:nth-child(3) {
    transform: rotate(-45deg) translate(7px, -6px);
  }
  
  .hero {
    padding: 60px 0 40px;
  }
  
  .hero-title {
    font-size: 2.5rem;
  }
  
  .hero-subtitle {
    font-size: 1.1rem;
  }
  
  .hero-buttons {
    flex-direction: column;
    align-items: center;
  }
  
  .upload-area {
    padding: 40px 20px;
  }
  
  .file-item {
    padding: 16px;
  }
  
  .merge-controls,
  .download-container {
    flex-direction: column;
    align-items: center;
  }
  
  .btn {
    width: 100%;
    max-width: 280px;
    justify-content: center;
  }
  
  .features-grid {
    grid-template-columns: 1fr;
    gap: 24px;
  }
  
  .feature-card {
    padding: 32px 20px;
  }
  
  .about-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }
  
  .creator-card {
    flex-direction: column;
    text-align: center;
  }
  
  .step {
    flex-direction: column;
    text-align: center;
  }
  
  .step:nth-child(even) {
    flex-direction: column;
  }
  
  .contact-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }
  
  .contact-form {
    padding: 32px 20px;
  }
  
  .faq-grid {
    grid-template-columns: 1fr;
  }
  
  .feedback-stats {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 480px) {
  .hero-title {
    font-size: 2rem;
  }
  
  .section-title {
    font-size: 2rem;
  }
  
  .upload-area {
    padding: 32px 16px;
  }
  
  .file-item {
    flex-direction: column;
    text-align: center;
    gap: 12px;
  }
  
  .file-info {
    order: -1;
    width: 100%;
    max-width: 100%;
  }
  
  .file-name {
    max-width: 100%;
    width: 100%;
    font-size: 0.9rem;
  }
  
  .page-hero-content h1 {
    font-size: 2rem;
  }
  
  .about-text h2,
  .creator-section h2,
  .mission-section h2,
  .process-overview h2,
  .technical-details h2,
  .features-explained h2,
  .compatibility-section h2,
  .privacy-intro h2,
  .privacy-principles h2,
  .how-it-works-privacy h2,
  .data-policy h2,
  .security-measures h2,
  .third-party-services h2,
  .privacy-commitment h2,
  .contact-privacy h2,
  .contact-info h2,
  .contact-form h2,
  .faq-section h2,
  .feedback-section h2 {
    font-size: 1.8rem;
  }
}

/* Scroll-based animations */
.animate-on-scroll {
  opacity: 0;
  transform: translateY(30px);
  transition: all 0.6s ease;
}

.animate-on-scroll.animated {
  opacity: 1;
  transform: translateY(0);
}

/* Loading states */
.loading {
  position: relative;
  overflow: hidden;
}

.loading::after {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.4), transparent);
  animation: shimmer 1.5s infinite;
}

@keyframes shimmer {
  0% {
    left: -100%;
  }
  100% {
    left: 100%;
  }
}

/* Form Validation Styles */
.form-group {
  position: relative;
}

.form-group.error input,
.form-group.error select,
.form-group.error textarea {
  border-color: #dc3545;
  box-shadow: 0 0 0 3px rgba(220, 53, 69, 0.1);
}

.form-group.success input,
.form-group.success select,
.form-group.success textarea {
  border-color: #28a745;
  box-shadow: 0 0 0 3px rgba(40, 167, 69, 0.1);
}

.form-group.error .error-message {
  display: block;
  color: #dc3545;
  font-size: 0.875rem;
  margin-top: 4px;
  font-weight: 500;
}

.form-group.success .success-message {
  display: block;
  color: #28a745;
  font-size: 0.875rem;
  margin-top: 4px;
  font-weight: 500;
}

.error-message,
.success-message {
  display: none;
}

.form-group.error label {
  color: #dc3545;
}

.form-group.success label {
  color: #28a745;
}

/* Form submission feedback */
.form-submit-feedback {
  padding: 16px;
  border-radius: var(--radius-medium);
  margin-bottom: 24px;
  font-weight: 500;
  display: none;
}

.form-submit-feedback.success {
  background: rgba(40, 167, 69, 0.1);
  color: #28a745;
  border: 1px solid rgba(40, 167, 69, 0.2);
}

.form-submit-feedback.error {
  background: rgba(220, 53, 69, 0.1);
  color: #dc3545;
  border: 1px solid rgba(220, 53, 69, 0.2);
}

/* Loading state for submit button */
.btn-loading {
  position: relative;
  color: transparent;
}

.btn-loading::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 20px;
  height: 20px;
  margin: -10px 0 0 -10px;
  border: 2px solid transparent;
  border-top: 2px solid currentColor;
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

@keyframes spin {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

/* Character counter for textarea */
.char-counter {
  font-size: 0.75rem;
  color: var(--text-muted);
  text-align: right;
  margin-top: 4px;
}

.char-counter.warning {
  color: #ffc107;
}

.char-counter.error {
  color: #dc3545;
}

/* Form validation icons */
.form-group .validation-icon {
  position: absolute;
  right: 12px;
  top: 50%;
  transform: translateY(-50%);
  width: 20px;
  height: 20px;
  display: none;
}

.form-group.success .validation-icon.success {
  display: block;
  position: absolute;
  right: 12px;
  top: 70%;
  transform: translateY(-50%);
  width: 20px;
  height: 20px;
  color: #28a745;
}

.form-group.error .validation-icon.error {
  display: block;
  color: #dc3545;
}

/* Mobile responsive adjustments for form validation */
@media (max-width: 768px) {
  .validation-icon {
    right: 8px;
    width: 18px;
    height: 18px;
  }
  
  .form-group.success .validation-icon.success {
    right: 8px;
    width: 18px;
    height: 18px;
  }
  
  .char-counter {
    font-size: 0.7rem;
  }
}