:root {
    --primary-color: #4f46e5;
    --accent-color: #6366f1;
    --text-color: #1f2937;
    --bg-light: #f9fafb;
    --bg-dark: #111827;
    --white: #ffffff;
    --transition: 0.3s ease;
  }
  * { box-sizing: border-box; margin: 0; padding: 0; }
  body { font-family: 'Inter', sans-serif; color: var(--text-color); background: var(--bg-light); line-height: 1.6; }
  a { text-decoration: none; color: inherit; }
  img { max-width: 100%; display: block; }
  .container { max-width: 1200px; margin: 0 auto; padding: 0 20px; }

  /* Navbar */
  header {
    background: var(--white);
    box-shadow: 0 2px 8px rgba(0,0,0,0.05);
    position: sticky;
    top: 0;
    z-index: 100;
  }
  .navbar { display: flex; justify-content: space-between; align-items: center; padding: 20px; }
  .navbar .logo { display: flex; align-items: center; }
  .navbar .logo img { width: 40px; height: 40px; margin-right: 10px; }
  .navbar nav { display: flex; gap: 20px; }
  .navbar nav a { font-weight: 600; transition: color var(--transition); }
  .navbar nav a:hover { color: var(--primary-color); }
  .menu-toggle { display: none; flex-direction: column; justify-content: center; width: 30px; height: 30px; background: none; border: none; cursor: pointer; }
  .menu-toggle span { display: block; width: 100%; height: 3px; background: var(--text-color); margin: 4px 0; transition: background var(--transition); }

  /* Mobile Nav */
  @media (max-width: 768px) {
    .menu-toggle { display: flex; }
    .navbar nav { display: none; position: absolute; top: 100%; right: 20px; background: var(--white); border: 1px solid #ddd; border-radius: 8px; flex-direction: column; width: 200px; }
    .navbar nav.show { display: flex; }
    .navbar nav a { padding: 10px 20px; }
  }

  /* Hero */
  .hero { display: flex; flex-direction: column; align-items: center; text-align: center; padding: 100px 20px; background-color: #1f2937; color: #ffffff; background-image: url("../images/hero-bg.png"); background-size: 40%; }
  .hero h1 { font-size: 3rem; margin-bottom: 20px; }
  .hero p { font-size: 1.25rem; margin-bottom: 30px; max-width: 600px; color: #ffffff; }
  .btn-primary { border: 1px solid; border-radius: 51px !important; background: var(--primary-color); color: var(--white); padding: 15px 30px; font-weight: 600; transition: background var(--transition); }
  .btn-primary:hover { background: var(--accent-color); }

  /* Features */
  .features { background: aquamarine; padding: 80px 20px; }
  .features h2 { text-align: center; font-size: 2rem; margin-bottom: 50px; }
  .feature-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); gap: 40px; }
  .feature-item { border: 1px solid; background: white; border-radius: 21px; padding: 30px; text-align: center; transition: transform var(--transition); box-shadow: 1px 17px 0px #ffffff; }
  .feature-item:hover { transform: translateY(-5px); }
  .feature-item h3 { margin-bottom: 15px; font-size: 1.25rem; color: var(--bg-dark); }

  /* Screenshots */
  .screenshots { padding: 80px 20px; }
  .screenshots h2 { text-align: center; font-size: 2rem; margin-bottom: 50px; }
  .screenshot-carousel { display: flex; gap: 20px; overflow-x: auto; padding-bottom: 10px; }
  .screenshot-carousel img { border-radius: 8px; box-shadow: 0 4px 12px rgba(0,0,0,0.1); flex-shrink: 0; width: 280px; cursor: pointer; }

  /* Modal */
  .modal { display: none; position: fixed; top: 0; left: 0; width: 100%; height: 100%; background: rgba(0,0,0,0.8); justify-content: center; align-items: center; z-index: 1000; }
  .modal-content { max-width: 90%; max-height: 90%; border-radius: 8px; box-shadow: 0 4px 12px rgba(0,0,0,0.2); }
  .modal-close { position: absolute; top: 20px; right: 30px; font-size: 40px; color: var(--white); cursor: pointer; }

  /* Footer */
  footer { background: var(--white); text-align: center; padding: 40px 20px; font-size: 0.9rem; color: #6b7280; }