* { box-sizing: border-box; }
    html, body {
      margin: 0;
      padding: 0;
      min-height: 100vh;
      width: 100%;
      overflow-x: hidden;
      font-family: "Inter", "Amiri", Arial, sans-serif;
      transition: background 0.5s ease, color 0.3s ease;
    }
    body {
      display: flex;
      flex-direction: column;
      align-items: center;
    }
    body.light {
      background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
      color: #111;
    }
    body.dark {
      background: linear-gradient(135deg, #0f2027, #203a43, #2c5364);
      color: #e6e6e6;
    }
    [lang="ar"] {
      direction: rtl;
      font-family: "Amiri", "Inter", Arial, sans-serif;
    }
    header, section, footer {
      width: 100%;
      padding: clamp(1rem, 5vw, 2rem);
      text-align: center;
    }
    [lang="ar"] header, [lang="ar"] section, [lang="ar"] footer {
      text-align: right;
    }
    h1 {
      font-size: clamp(2rem, 6vw, 3.2rem);
      font-weight: 700;
      margin: 0;
      color: inherit;
      /* background: linear-gradient(135deg, #667eea 0%, #764ba2 100%); */
      /* -webkit-background-clip: text; */
      /* -webkit-text-fill-color: transparent; */
      /* background-clip: text; */
    }
    body.dark h1 {
      color: white;
      /* -webkit-background-clip: text; */
      /* -webkit-text-fill-color: transparent; */
      /* background-clip: text; */
    }
    h2 {
      font-size: clamp(1.5rem, 4vw, 2rem);
      font-weight: 600;
      margin: 0.5rem 0;
      color: inherit;
    }
    h3 {
      font-size: clamp(1.2rem, 3vw, 1.5rem);
      font-weight: 600;
      margin: 0.5rem 0;
    }
    p {
      font-size: clamp(0.9rem, 2.5vw, 1.1rem);
      color: black;
      margin: 0.5rem 0;
      line-height: 1.6;
    }
    body.dark p {
      color: #f0f0f0;
    }
    
    /* Enhanced Button Styles */
    .btn {
      display: inline-block;
      border: none;
      background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
      color: #fff;
      padding: clamp(0.7rem, 2vw, 1rem) clamp(1.5rem, 3vw, 2rem);
      border-radius: 12px;
      font-size: clamp(0.9rem, 2.5vw, 1rem);
      font-weight: 600;
      text-decoration: none;
      text-transform: uppercase;
      cursor: pointer;
      transition: all 0.3s ease;
      box-shadow: 0 4px 12px rgba(0,0,0,0.1);
      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:hover {
      transform: translateY(-3px);
      box-shadow: 0 10px 20px rgba(0,0,0,0.2);
    }
    body.dark .btn {
      background: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
      color: #fff;
    }
    body.dark .btn:hover {
      box-shadow: 0 10px 20px rgba(0,0,0,0.4);
    }
    
    #hero {
      position: relative;
      width: 100vw;
      min-height: 400px;
      display: flex;
      align-items: center;
      justify-content: center;
      overflow: hidden;
    }
    body.dark #hero {
    }
    #hero-video {
      position: absolute;
      top: 0;
      left: 0;
      width: 100vw;
      height: 100vh;
      object-fit: cover;
      z-index: -1;
      opacity: 0.8;
    }
    #hero::before {
      content: "";
      position: absolute;
      inset: 0;
      z-index: 0;
      background: rgba(0,0,0,0.4);
    }
    .hero-content {
      position: relative;
      z-index: 1;
      text-align: center;
      max-width: 800px;
      padding: 2rem;
    }
    [lang="ar"] .hero-content {
      text-align: right;
    }
    #hero h1, #hero p {
      color: #fff;
      text-shadow: 0 2px 4px rgba(0,0,0,0.5);
    }
    .video-error {
      display: none;
      color: #ff6b6b;
      font-size: clamp(0.8rem, 2vw, 0.9rem);
      margin-top: 0.5rem;
    }
    #tutorial{
      background-color: transparent;
    }
    
    /* Enhanced Card Styles */
    #features, #testimonials, #why-apps-localization, #translation-preview {
      background: rgba(255,255,255,0.95);
      backdrop-filter: blur(10px);
      box-shadow: 0 20px 40px rgba(0,0,0,0.1);
      padding: clamp(2rem, 5vw, 3rem);
      margin: 2rem 0;
      border-radius: 20px;
      border: 1px solid rgba(255,255,255,0.2);
    }
    body.dark #features, body.dark #testimonials, body.dark #why-apps-localization, body.dark #tutorial, body.dark #translation-preview {
      background: rgba(30,32,44,0.95);
      box-shadow: 0 20px 40px rgba(0,0,0,0.4);
      border: 1px solid rgba(255,255,255,0.1);
    }
    
    /* Enhanced Feature Grid */
    .feature-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
      gap: clamp(1rem, 3vw, 2rem);
      margin-top: clamp(1.5rem, 4vw, 2.5rem);
    }
    .feature-card {
      background: rgba(255,255,255,0.8);
      border-radius: 16px;
      padding: clamp(1rem, 3vw, 1.5rem);
      box-shadow: 0 8px 24px rgba(0,0,0,0.1);
      transition: all 0.3s ease;
      backdrop-filter: blur(10px);
      border: 1px solid rgba(255,255,255,0.2);
    }
    .feature-card:hover {
      transform: translateY(-5px);
      box-shadow: 0 15px 30px rgba(0,0,0,0.15);
    }
    body.dark .feature-card {
      background: rgba(36,38,54,0.8);
      box-shadow: 0 8px 24px rgba(0,0,0,0.4);
    }
    
    #how-to-use {
      position: relative;
    }
    #how-to-use .timeline {
      position: relative;
      max-width: min(90vw, 800px);
      margin: 2rem auto;
      padding: 0;
      list-style: none;
    }
    #how-to-use .timeline::before {
      content: '';
      position: absolute;
      left: 20px;
      top: 0;
      bottom: 0;
      width: 4px;
      background: #667eea;
    }
    [lang="ar"] #how-to-use .timeline::before {
      left: auto;
      right: 20px;
    }
    body.dark #how-to-use .timeline::before {
      background: #4facfe;
    }
    #how-to-use .timeline li {
      position: relative;
      margin: 2rem 0;
      padding-left: 50px;
      font-size: clamp(0.9rem, 2.5vw, 1rem);
      color: #111;
      background: rgba(255,255,255,0.9);
      padding: 1rem;
      border-radius: 12px;
      box-shadow: 0 4px 12px rgba(0,0,0,0.1);
      backdrop-filter: blur(10px);
    }
    [lang="ar"] #how-to-use .timeline li {
      padding-left: 0;
      padding-right: 50px;
      text-align: right;
    }
    body.dark #how-to-use .timeline li {
      color: #e6e6e6;
      background: rgba(36,38,54,0.9);
      box-shadow: 0 4px 12px rgba(0,0,0,0.4);
    }
    #how-to-use .timeline li::before {
      content: '';
      position: absolute;
      left: 12px;
      top: 50%;
      transform: translateY(-50%);
      width: 20px;
      height: 20px;
      background: #667eea;
      border-radius: 50%;
      border: 3px solid #fff;
      box-shadow: 0 0 0 3px #667eea;
    }
    [lang="ar"] #how-to-use .timeline li::before {
      left: auto;
      right: 12px;
    }
    body.dark #how-to-use .timeline li::before {
      background: #4facfe;
      border: 3px solid #2c5364;
      box-shadow: 0 0 0 3px #4facfe;
    }
    
    #testimonials .testimonial-grid {
      display: flex;
      overflow-x: auto;
      gap: clamp(1rem, 3vw, 2rem);
      margin-top: clamp(1.5rem, 4vw, 2.5rem);
      padding-bottom: 1rem;
      scrollbar-width: thin;
      scrollbar-color: #667eea #eaeaea;
    }
    #testimonials .testimonial-grid::-webkit-scrollbar {
      height: 8px;
    }
    #testimonials .testimonial-grid::-webkit-scrollbar-track {
      background: #eaeaea;
      border-radius: 4px;
    }
    #testimonials .testimonial-grid::-webkit-scrollbar-thumb {
      background: #667eea;
      border-radius: 4px;
    }
    body.dark #testimonials .testimonial-grid::-webkit-scrollbar-track {
      background: #2a2d3a;
    }
    body.dark #testimonials .testimonial-grid::-webkit-scrollbar-thumb {
      background: #4facfe;
    }
    
    .testimonial-card {
      flex: 0 0 auto;
      width: 300px;
      background: rgba(255,255,255,0.8);
      border-radius: 16px;
      padding: clamp(1rem, 3vw, 1.5rem);
      box-shadow: 0 8px 24px rgba(0,0,0,0.1);
      display: flex;
      flex-direction: column;
      align-items: center;
      backdrop-filter: blur(10px);
      border: 1px solid rgba(255,255,255,0.2);
    }
    [lang="ar"] .testimonial-card {
      text-align: right;
    }
    body.dark .testimonial-card {
      background: rgba(36,38,54,0.8);
      box-shadow: 0 8px 24px rgba(0,0,0,0.4);
    }
    
    .avatar {
      width: 60px;
      height: 60px;
      border-radius: 50%;
      object-fit: cover;
      margin-bottom: 0.5rem;
    }
    
    #tutorial iframe {
      width: 100%;
      max-width: min(90vw, 800px);
      height: clamp(200px, 50vw, 450px);
      border: none;
      border-radius: 16px;
      box-shadow: 0 8px 24px rgba(0,0,0,0.2);
    }
    body.dark #tutorial iframe {
      box-shadow: 0 8px 24px rgba(0,0,0,0.5);
    }
    
    footer {
      margin-top: clamp(2rem, 5vw, 3rem);
      font-size: clamp(0.8rem, 2vw, 0.9rem);
      color: black;
    }
    body.dark footer {
      color: #f0f0f0;
    }
    
    /* Enhanced Theme Toggle */
    #theme-toggle {
      position: fixed;
      top: clamp(10px, 2vw, 20px);
      right: clamp(10px, 2vw, 20px);
      background: rgba(0,0,0,0.6);
      color: #fff;
      border: none;
      border-radius: 50%;
      width: clamp(40px, 8vw, 50px);
      height: clamp(40px, 8vw, 50px);
      font-size: clamp(1rem, 3vw, 1.3rem);
      cursor: pointer;
      z-index: 10000;
      display: flex;
      align-items: center;
      justify-content: center;
      transition: transform 0.3s, box-shadow 0.3s;
      backdrop-filter: blur(10px);
    }
    [lang="ar"] #theme-toggle {
      right: auto;
      left: clamp(10px, 2vw, 20px);
    }
    #theme-toggle:hover {
      transform: translateY(-3px) rotate(15deg);
      box-shadow: 0 8px 18px rgba(0,0,0,0.4);
    }
    
    /* Enhanced Language Selector */
    #language-selector {
      position: fixed;
      top: clamp(10px, 2vw, 20px);
      left: clamp(10px, 2vw, 20px);
      z-index: 10000;
      display: flex;
      align-items: center;
      background: rgba(0,0,0,0.6);
      border-radius: 50px;
      padding: 8px 15px;
      color: white;
      backdrop-filter: blur(10px);
    }
    [lang="ar"] #language-selector {
      left: auto;
      right: clamp(10px, 2vw, 20px);
    }
    #language-selector select {
      background: transparent;
      border: none;
      color: white;
      font-size: 0.9rem;
      margin-left: 8px;
      cursor: pointer;
    }
    [lang="ar"] #language-selector select {
      margin-left: 0;
      margin-right: 8px;
    }
    #language-selector select option {
      background: #333;
      color: white;
    }
    
    /* Enhanced Translation Preview Styles */
    .translation-preview-container {
      max-width: 1200px;
      margin: 0 auto;
    }
    .language-selector-preview {
      display: flex;
      align-items: center;
      justify-content: center;
      margin-bottom: 2rem;
      gap: 1rem;
    }
    [lang="ar"] .language-selector-preview {
      justify-content: flex-end;
    }
    .language-selector-preview label {
      font-weight: 600;
      font-size: 1.1rem;
    }
    .language-selector-preview select {
      padding: 0.5rem 1rem;
      border-radius: 12px;
      border: 1px solid #ddd;
      font-size: 1rem;
      background: rgba(255,255,255,0.8);
      transition: all 0.3s ease;
    }
    .language-selector-preview select:focus {
      outline: none;
      border-color: #667eea;
      box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.2);
    }
    body.dark .language-selector-preview select {
      background: rgba(42,45,58,0.8);
      color: #e0e0e0;
      border: 1px solid black;
    }
    body.dark .language-selector-preview select:focus {
      border-color: #4facfe;
      box-shadow: 0 0 0 3px rgba(79, 172, 254, 0.2);
    }
    
    .original-preview-section {
      margin-bottom: 3rem;
    }
    .preview-image-container {
      position: relative;
      max-width: 600px;
      margin: 0 auto;
      border-radius: 20px;
      overflow: hidden;
      box-shadow: 0 15px 35px rgba(0, 0, 0, 0.15);
      transition: transform 0.3s ease;
    }
    .preview-image-container:hover {
      transform: translateY(-5px);
    }
    .preview-image-container img {
      width: 100%;
      display: block;
      transition: transform 0.5s ease;
    }
    .preview-image-container:hover img {
      transform: scale(1.03);
    }
    .image-placeholder-preview {
      width: 100%;
      height: 400px;
      display: flex;
      align-items: center;
      justify-content: center;
      background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
      color: white;
      font-weight: 600;
      font-size: 1.1rem;
      border-radius: 20px;
    }
    body.dark .image-placeholder-preview {
      background: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
      color: white;
    }
    .image-label-preview {
      position: absolute;
      bottom: 0;
      left: 0;
      right: 0;
      background: rgba(0, 0, 0, 0.7);
      color: white;
      padding: 15px;
      font-size: 1.2rem;
    }
    
    .translations-grid-preview {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
      gap: 25px;
      align-items: start;
    }
    .translation-card-preview {
      background: white;
      border-radius: 20px;
      overflow: visible;
      box-shadow: 0 12px 28px rgba(0, 0, 0, 0.08);
      transition: all 0.3s ease;
      border: 1px solid rgba(255,255,255,0.2);
      height: auto;
      backdrop-filter: blur(10px);
    }
    .translation-card-preview:hover {
      transform: translateY(-10px);
      box-shadow: 0 20px 40px rgba(0, 0, 0, 0.15);
    }
    body.dark .translation-card-preview {
      background: rgba(36,38,54,0.95);
      border: 1px solid rgba(255,255,255,0.1);
    }
    
    .translation-image-preview {
      width: 100%;
      height: auto;
      overflow: visible;
      background-color: #f8f9fa;
      display: flex;
      align-items: center;
      justify-content: center;
      border-radius: 20px 20px 0 0;
    }
    body.dark .translation-image-preview {
      background-color: #2a2d3a;
    }
    .translation-image-preview img {
      width: 100%;
      height: auto;
      object-fit: contain;
      transition: transform 0.5s ease;
    }
    .translation-card-preview:hover .translation-image-preview img {
      transform: scale(1.1);
    }
    
    .translation-info-preview {
      padding: 20px;
      text-align: left;
    }
    [lang="ar"] .translation-info-preview {
      text-align: right;
    }
    .translation-title-preview {
      font-size: 1.2rem;
      color: #333;
      margin-bottom: 10px;
      font-weight: 600;
    }
    body.dark .translation-title-preview {
      color: #f0f0f0;
    }
    .translation-desc-preview {
      color: #666;
      font-size: 0.95rem;
      line-height: 1.5;
    }
    body.dark .translation-desc-preview {
      color: #e0e0e0;
    }
    .language-badge-preview {
      display: inline-block;
      background: linear-gradient(to right, #667eea, #764ba2);
      color: white;
      padding: 5px 12px;
      border-radius: 20px;
      font-size: 0.8rem;
      margin-top: 10px;
      font-weight: 600;
    }
    body.dark .language-badge-preview {
      background: linear-gradient(to right, #4facfe, #00f2fe);
    }
    
    .testimonial-card p:nth-of-type(1) {
      color: rgba(0, 0, 0, 0.75);
      font-style: italic;
    }
    .testimonial-card p:nth-of-type(2) {
      color: rgba(0, 0, 0, 0.5);
      font-weight: 600;
      margin-top: 0.5rem;
    }
    body.dark .testimonial-card p:nth-of-type(1) {
      color: rgba(255, 255, 255, 0.75);
    }
    body.dark .testimonial-card p:nth-of-type(2) {
      color: rgba(255, 255, 255, 0.5);
    }
    
    @media (max-width: 768px) {
      .translations-grid-preview {
        grid-template-columns: 1fr;
      }
      .language-selector-preview {
        flex-direction: column;
      }
      #language-selector {
        top: 60px;
      }
      .translation-image-preview {
        height: auto;
      }
    }
    @media (max-width: 768px) {
  #how-to-use {
    padding: 2rem 1rem;
    text-align: center;
    
    display: none;
  }

  #how-to-use h2 {
    font-size: 1.6rem;
    margin-bottom: 0.5rem;
  }

  #how-to-use p {
    font-size: 1rem;
    margin-bottom: 1.2rem;
    line-height: 1.5;
  }

  .timeline {
    list-style: none;
    padding: 0;
    margin: 0 auto;
    max-width: 90%;
    text-align: left;
  }

  .timeline li {
    background: rgba(255, 255, 255, 0.9);
    padding: 0.9rem 1rem;
    margin-bottom: 0.8rem;
    border-radius: 10px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
    font-size: 0.95rem;
    line-height: 1.4;
  }

#how-to-use .timeline li {

    display: none;
}
  body.dark .timeline li {
    background: rgba(36, 38, 54, 0.95);
    color: #e0e0e0;
    box-shadow: 0 2px 8px rgba(0,0,0,0.4);
  }
}

/* Inline styles moved from HTML */
.tutorial-video-container {
  position: relative;
  width: 100%;
  height: 80vh;
  overflow: hidden;
  border-radius: 20px;
  max-width: 1200px;
  margin: 0 auto;
  background: black;
  box-shadow: 0 15px 35px rgba(0,0,0,0.2);
}

.tutorial-iframe {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 160%;
  height: 160%;
  transform: translate(-50%, -50%) scale(1.05);
  object-fit: cover;
  border: none;
}

.image-placeholder-preview.hidden {
  display: none !important;
}