:root {
    --primary: #4A90E2;
    --secondary: #2C3E50;
    --text: #2D2D2D;
    --light: #FFFFFF;
    --gradient: linear-gradient(135deg, #1a2b6d, #2850c9);
  }
  
  * {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Inter', sans-serif;
    font-weight: 700;
  }
  
  body {
    background: var(--light);
    color: var(--text);
    line-height: 1.6;
  }
  
  nav {
    background: var(--light);
    padding: 1rem 2rem;
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
  }
  
  .nav-container {
    max-width: 1400px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
  }
  
  .logo {
    font-size: 1.5rem;
    color: var(--secondary);
    text-decoration: none;
    font-weight: 900;
  }
  
  .nav-links {
    display: flex;
    gap: 2rem;
  }
  
  .nav-links a {
    color: var(--secondary);
    text-decoration: none;
    font-weight: 600;
    transition: color 0.3s;
  }
  
  .nav-links a:hover {
    color: var(--primary);
  }
  
  .mobile-menu {
    display: none;
    font-size: 1.5rem;
    cursor: pointer;
  }
  
  .hero {
    background: var(--gradient);
    padding: 8rem 2rem;
    text-align: center;
    color: white;
    margin-top: 4rem;
    position: relative;
    overflow: hidden;
  }
  
  .hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(45deg, rgba(0,0,0,0.2) 0%, rgba(0,0,0,0) 100%);
    z-index: 1;
  }
  
  .hero > * {
    position: relative;
    z-index: 2;
  }
  
  .hero h1 {
    font-size: 4.5rem;
    margin-bottom: 1.5rem;
    animation: fadeIn 1s ease-out;
    font-weight: 900;
    line-height: 1.2;
  }
  
  .hero p {
    font-size: 1.5rem;
    max-width: 800px;
    margin: 0 auto 2.5rem;
    font-weight: 600;
  }
  
  .cta-btn {
    display: inline-block;
    padding: 1.2rem 3rem;
    background: #ff6b2b;
    color: white;
    text-decoration: none;
    border-radius: 40px;
    font-weight: 800;
    font-size: 1.2rem;
    transition: all 0.3s;
    text-transform: uppercase;
    box-shadow: 0 4px 15px rgba(255,107,43,0.3);
  }
  
  .cta-btn:hover {
    background: #ff824d;
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(255,107,43,0.4);
  }
  
  .features {
    padding: 6rem 2rem;
    max-width: 1400px;
    margin: 0 auto;
  }
  
  .features h2 {
    font-size: 3rem;
    margin-bottom: 3rem;
    text-align: center;
    font-weight: 800;
  }
  
  .features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 3rem;
  }
  
  .feature-card {
    background: white;
    padding: 3rem;
    border-radius: 20px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.1);
    transition: transform 0.3s;
  }
  
  .feature-card:hover {
    transform: translateY(-10px);
  }
  
  .feature-card h3 {
    color: var(--primary);
    margin-bottom: 1.5rem;
    font-size: 1.8rem;
    font-weight: 800;
  }
  
  .feature-card p {
    font-size: 1.2rem;
  }
  
  .testimonials {
    background: linear-gradient(135deg, #253867, #1c2b4b);
    color: white;
    padding: 6rem 2rem;
  }
  
  .testimonials h2 {
    font-size: 3rem;
    margin-bottom: 3rem;
    text-align: center;
    font-weight: 800;
  }
  
  .testimonials-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 3rem;
    max-width: 1400px;
    margin: 2rem auto;
  }
  
  .testimonial-card {
    background: rgba(255,255,255,0.1);
    padding: 3rem;
    border-radius: 20px;
  }
  
  .testimonial-card p {
    font-size: 1.3rem;
    margin-bottom: 1.5rem;
  }
  
  .testimonial-card h4 {
    font-size: 1.1rem;
    color: var(--primary);
  }
  
  .responsive-iframe-container {
    position: relative;
    overflow: hidden;
    padding-top: 100%;
    margin: 4rem auto;
    max-width: 1400px;
    border-radius: 20px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.1);
  }
  
  .responsive-iframe-container iframe {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    border: 0;
  }
  
  @keyframes fadeIn {
    from { opacity: 0; transform: translateY(30px); }
    to { opacity: 1; transform: translateY(0); }
  }
  
  @media (max-width: 768px) {
    .nav-links {
      display: none;
    }
  
    .mobile-menu {
      display: block;
    }
  
    .hero h1 {
      font-size: 3rem;
    }
  
    .hero p {
      font-size: 1.2rem;
    }
  
    .features h2, .testimonials h2 {
      font-size: 2.5rem;
    }
  
    .responsive-iframe-container {
      padding-top: 200%;
    }
  }
  
  @media (max-width: 480px) {
    .footer-content {
      grid-template-columns: 1fr;
    }
  }
  
  footer {
    background: linear-gradient(135deg, #1c2b4b, #253867);
    color: var(--light);
    padding: 4rem 2rem;
  }
  
  .footer-content {
    max-width: 1400px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 2rem;
  }
  
  .footer-section h3 {
    font-size: 1.2rem;
    margin-bottom: 1.5rem;
  }
  
  .footer-section ul {
    list-style: none;
  }
  
  .footer-section ul li {
    margin-bottom: 0.8rem;
  }
  
  .footer-section a {
    color: var(--light);
    text-decoration: none;
    opacity: 0.8;
    transition: opacity 0.3s;
  }
  
  .footer-section a:hover {
    opacity: 1;
  }
  
  .footer-bottom {
    text-align: center;
    padding-top: 2rem;
    margin-top: 2rem;
    border-top: 1px solid rgba(255,255,255,0.1);
  }
  
  .about, .how-it-works, .faq {
    padding: 6rem 2rem;
    max-width: 1400px;
    margin: 0 auto;
  }
  
  .about h2, .how-it-works h2, .faq h2 {
    font-size: 3rem;
    margin-bottom: 2rem;
    text-align: center;
    font-weight: 800;
  }
  
  .about p {
    font-size: 1.2rem;
    text-align: center;
    max-width: 800px;
    margin: 0 auto;
    line-height: 1.8;
  }
  
  .steps-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
  }
  
  .step-card {
    background: white;
    padding: 2rem;
    border-radius: 15px;
    box-shadow: 0 5px 15px rgba(0,0,0,0.1);
    text-align: center;
    position: relative;
  }
  
  .step-number {
    width: 40px;
    height: 40px;
    background: var(--primary);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1rem;
    font-weight: 800;
  }
  
  .faq-container {
    max-width: 800px;
    margin: 0 auto;
  }
  
  .faq-item {
    background: white;
    padding: 2rem;
    border-radius: 15px;
    margin-bottom: 1.5rem;
    box-shadow: 0 5px 15px rgba(0,0,0,0.1);
  }
  
  .faq-item h3 {
    color: var(--primary);
    margin-bottom: 1rem;
    font-size: 1.3rem;
  }
  
  .faq-item p {
    font-size: 1.1rem;
    line-height: 1.6;
  }
  
  .affiliate-disclaimer {
    background: #f8f9fa;
    padding: 2rem;
    text-align: center;
    font-size: 0.9rem;
    color: #666;
    max-width: 1200px;
    margin: 0 auto;
    border-radius: 10px;
  }
  
  @media (max-width: 768px) {
    .about h2, .how-it-works h2, .faq h2 {
      font-size: 2.5rem;
    }
  
    .steps-grid {
      grid-template-columns: 1fr;
    }
  
    .faq-item {
      padding: 1.5rem;
    }
  }