* {
    box-sizing: border-box;
  }
  
  body {
    margin: 0;
    font-family: Arial, Helvetica, sans-serif;
    color: #172033;
    background: #f7f8fb;
  }
  
  .site-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 24px 8%;
    background: white;
    border-bottom: 1px solid #e4e7ef;
  }
  
  .logo {
    font-size: 24px;
    font-weight: 800;
    letter-spacing: -0.5px;
  }
  
  nav a {
    margin-left: 24px;
    color: #172033;
    text-decoration: none;
    font-weight: 600;
  }
  
  .hero {
    padding: 110px 8%;
    max-width: 950px;
  }
  
  .eyebrow {
    color: #4361ee;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1.5px;
  }
  
  h1 {
    font-size: 64px;
    line-height: 1;
    margin: 16px 0;
    letter-spacing: -2px;
  }
  
  .subtitle {
    font-size: 22px;
    line-height: 1.5;
    color: #4d5870;
    max-width: 760px;
  }
  
  .button {
    display: inline-block;
    margin-top: 28px;
    padding: 14px 22px;
    background: #172033;
    color: white;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 700;
  }
  
  .section {
    padding: 80px 8%;
    background: white;
  }
  
  .section h2 {
    font-size: 38px;
    margin-top: 0;
    letter-spacing: -1px;
  }
  
  .feature-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 18px;
    margin-top: 32px;
  }
  
  .feature-grid div {
    background: #f1f3f8;
    padding: 24px;
    border-radius: 12px;
    font-weight: 700;
  }
  
  .dark {
    background: #172033;
    color: white;
  }
  
  .dark p {
    color: #d8deea;
    max-width: 720px;
    font-size: 20px;
    line-height: 1.5;
  }
  
  footer {
    padding: 28px 8%;
    color: #68738a;
    background: white;
    border-top: 1px solid #e4e7ef;
  }
  
  @media (max-width: 800px) {
    .site-header {
      display: block;
    }
  
    nav {
      margin-top: 16px;
    }
  
    nav a {
      margin-left: 0;
      margin-right: 16px;
    }
  
    h1 {
      font-size: 44px;
    }
  
    .feature-grid {
      grid-template-columns: 1fr;
    }
  }