:root {
      --primary: #2563eb;
      --primary-dark: #1d4ed8;
      --primary-light: #93c5fd;
      --dark: #1e293b;
      --light: #f8fafc;
      --gray: #64748b;
      --accent: #10b981;
      --danger: #ef4444;
      --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
      --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
      --shadow-md: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
      --shadow-lg: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
      --rounded-sm: 0.25rem;
      --rounded: 0.5rem;
      --rounded-md: 0.75rem;
      --rounded-lg: 1rem;
      --transition: all 0.2s ease;
    }

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

    body {
      font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
      background: var(--light);
      color: var(--dark);
      line-height: 1.6;
      scroll-behavior: smooth;
      -webkit-font-smoothing: antialiased;
    }

    /* Modern Top Navigation */
    .navbar {
      position: fixed;
      top: 0;
      left: 0;
      right: 0;
      background: rgba(255, 255, 255, 0.95);
      backdrop-filter: blur(10px);
      box-shadow: var(--shadow-sm);
      z-index: 1000;
      padding: 1rem 2rem;
      display: flex;
      justify-content: space-between;
      align-items: center;
    }

    .navbar-container {
      width: 100%;
      max-width: 1200px;
      margin: 0 auto;
      display: flex;
      justify-content: space-between;
      align-items: center;
    }

    .logo {
      font-weight: 700;
      font-size: 1.5rem;
      color: var(--primary);
      text-decoration: none;
      display: flex;
      align-items: center;
      gap: 0.5rem;
    }

    .nav-links {
      display: flex;
      gap: 1.5rem;
      align-items: center;
    }

    .nav-links a {
      color: var(--dark);
      text-decoration: none;
      font-weight: 500;
      font-size: 0.95rem;
      transition: var(--transition);
      padding: 0.5rem 0;
      position: relative;
    }

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

    .nav-links a:after {
      content: '';
      position: absolute;
      bottom: 0;
      left: 0;
      width: 0;
      height: 2px;
      background: var(--primary);
      transition: var(--transition);
    }

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

    .language-switch {
      display: flex;
      gap: 0.5rem;
      margin-left: 1.5rem;
    }

    .language-switch button {
      background: transparent;
      border: 1px solid var(--gray);
      color: var(--gray);
      padding: 0.25rem 0.75rem;
      border-radius: var(--rounded);
      cursor: pointer;
      font-weight: 500;
      font-size: 0.85rem;
      transition: var(--transition);
    }

    .language-switch button:hover {
      border-color: var(--primary);
      color: var(--primary);
    }

    .language-switch button.active {
      background: var(--primary);
      border-color: var(--primary);
      color: white;
    }

    .mobile-menu-btn {
      display: none;
      background: none;
      border: none;
      font-size: 1.5rem;
      color: var(--dark);
      cursor: pointer;
    }

    /* Hero Section */
    .hero {
      padding: 8rem 2rem 6rem;
      text-align: center;
      background: linear-gradient(135deg, #2563eb 0%, #10b981 100%);
      color: white;
      margin-top: 4rem;
    }

    .hero h1 {
      font-size: 3.5rem;
      font-weight: 800;
      margin-bottom: 1.5rem;
      line-height: 1.2;
    }

    .hero p {
      font-size: 1.25rem;
      max-width: 700px;
      margin: 0 auto 2.5rem;
      opacity: 0.9;
    }

    .cta-button {
      display: inline-block;
      background: white;
      color: var(--primary);
      font-weight: 600;
      padding: 1rem 2rem;
      border-radius: var(--rounded);
      text-decoration: none;
      transition: var(--transition);
      box-shadow: var(--shadow);
    }

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

    .play-badge-wrapper {
      margin-top: 3rem;
    }

    .gplay-badge {
      height: 120px;
      transition: var(--transition);
    }

    .gplay-badge:hover {
      transform: scale(1.05);
    }

    /* Features Section */
    .features {
      padding: 6rem 2rem;
      max-width: 1200px;
      margin: 0 auto;
    }

    .section-title {
      text-align: center;
      font-size: 2.5rem;
      font-weight: 700;
      margin-bottom: 3rem;
      color: var(--dark);
    }

    .features-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
      gap: 2rem;
    }

    .feature-card {
      background: white;
      border-radius: var(--rounded-lg);
      padding: 2rem;
      box-shadow: var(--shadow);
      transition: var(--transition);
    }

    .feature-card:hover {
      transform: translateY(-5px);
      box-shadow: var(--shadow-md);
    }

    .feature-icon {
      width: 60px;
      height: 60px;
      background: var(--primary-light);
      border-radius: var(--rounded);
      display: flex;
      align-items: center;
      justify-content: center;
      margin-bottom: 1.5rem;
    }

    .feature-icon img {
      width: 30px;
      height: 30px;
    }

    .feature-card h3 {
      font-size: 1.25rem;
      font-weight: 600;
      margin-bottom: 1rem;
      color: var(--dark);
    }

    .feature-card p {
      color: var(--gray);
      font-size: 1rem;
    }

    /* Screenshots Section */
    .screenshots-section {
      padding: 6rem 2rem;
      background: #f1f5f9;
    }

    .screenshots-container {
      max-width: 1200px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: 2rem;
    }

    .screenshot-item {
      display: flex;
      align-items: center;
      gap: 3rem;
      margin-bottom: 3rem;
    }

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

    .screenshot-text {
      flex: 1;
    }

    .screenshot-text p {
      color: var(--gray);
      font-size: 1.1rem;
      line-height: 1.7;
    }

    .screenshot-image {
      flex: 1;
      border-radius: var(--rounded-lg);
      overflow: hidden;
      box-shadow: var(--shadow-lg);
    }

    .screenshot-image img {
      width: 100%;
      height: auto;
      display: block;
    }

    /* FAQ Section */
    .faq-section {
      padding: 6rem 2rem;
      max-width: 800px;
      margin: 0 auto;
    }

    .faq-item {
      margin-bottom: 1rem;
      border-radius: var(--rounded);
      overflow: hidden;
      border: 1px solid #e2e8f0;
    }

    .faq-question {
      width: 100%;
      background: white;
      padding: 1.5rem;
      text-align: left;
      border: none;
      font-size: 1.1rem;
      font-weight: 600;
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      transition: var(--transition);
    }

    .faq-question:hover {
      background: #f8fafc;
    }

    .faq-question:after {
      content: '+';
      font-size: 1.5rem;
      color: var(--primary);
    }

    .faq-question[aria-expanded="true"]:after {
      content: '-';
    }

    .faq-answer {
      display: none;
      padding: 1.5rem;
      background: white;
      border-top: 1px solid #e2e8f0;
      color: var(--gray);
      line-height: 1.7;
    }

    /* Contact section */
    .contact-section {
      padding: 6rem 2rem;
      background: #f9fafb;
      text-align: center;
    }

    .contact-content {
      max-width: 600px;
      margin: 0 auto;
      color: var(--gray);
      font-size: 1.1rem;
    }

    .contact-list {
      list-style: none;
      padding: 1rem 0 0;
    }

    .contact-list li {
      margin: 0.5rem 0;
      font-weight: 500;
      color: var(--dark);
    }

    .contact-list a {
      color: var(--primary);
      text-decoration: none;
    }

    .contact-list a:hover {
      text-decoration: underline;
    }

    /* feedback form */
    .contact-form-wrapper {
      background: #f7f9fc;
      padding: 3rem 1rem;
      border-top: 1px solid #e0e0e0;
    }

    .contact-form-container {
      max-width: 600px;
      margin: 0 auto;
      background: white;
      padding: 2rem;
      border-radius: 16px;
      box-shadow: 0 8px 20px rgba(0, 0, 0, 0.06);
    }

    .contact-form label {
      display: block;
      margin-bottom: 1.25rem;
    }

    .contact-form span {
      display: block;
      margin-bottom: 0.5rem;
      font-weight: 500;
      color: #333;
    }

    .contact-form input,
    .contact-form textarea {
      width: 100%;
      padding: 0.75rem 1rem;
      border: 1px solid #ccc;
      border-radius: 8px;
      font-size: 1rem;
      font-family: inherit;
      transition: border-color 0.3s;
    }

    .contact-form input:focus,
    .contact-form textarea:focus {
      border-color: #007BFF;
      outline: none;
    }

    .cta-button {
      background-color: #007BFF;
      color: white;
      border: none;
      padding: 0.75rem 1.5rem;
      font-size: 1rem;
      border-radius: 8px;
      cursor: pointer;
      transition: background-color 0.3s;
    }

    .cta-button:hover {
      background-color: #0056cc;
    }

    .form-status {
      margin-top: 1rem;
      font-size: 1rem;
      opacity: 0;
      transition: opacity 0.3s ease-in-out;
      height: 1.5em;
    }

    .form-status.success,
    .form-status.error {
      opacity: 1;
    }

    .form-status.success {
      color: #28a745; /* green */
    }

    .form-status.error {
      color: #dc3545; /* red */
    }

    /* Footer */
    footer {
      background: var(--dark);
      color: white;
      padding: 4rem 2rem;
      text-align: center;
    }
  
    /* Desktop 50% screenshot */
  @media (min-width: 1024px) {
    .screenshot-image img {
      width: 50%;
      display: block;
      margin: 0 auto;
    }
  }    

    /* Responsive Styles */
    @media (max-width: 768px) {
      .navbar {
        padding: 1rem;
      }

      .nav-links {
        display: none;
        position: fixed;
        top: 4rem;
        left: 0;
        right: 0;
        background: white;
        flex-direction: column;
        padding: 1rem;
        box-shadow: var(--shadow-md);
      }

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

      .mobile-menu-btn {
        display: block;
      }

      .hero {
        padding: 6rem 1rem 4rem;
      }

      .hero h1 {
        font-size: 2.5rem;
      }

      .hero p {
        font-size: 1.1rem;
      }

      .screenshot-item,
      .screenshot-item:nth-child(even) {
        flex-direction: column;
        gap: 1.5rem;
      }

      .features-grid {
        grid-template-columns: 1fr;
      }
    }