* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: Arial, sans-serif;
  }
  
  body {
    background-color: #0d1117;
    color: #e6edf3;
    line-height: 1.6;
  }
  
  header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 10%;
    border-bottom: 1px solid #1f2937;
  }
  
  .logo {
    font-size: 1.5rem;
    font-weight: bold;
    color: #58a6ff;
  }
  
  nav a {
    color: #c9d1d9;
    margin-left: 20px;
    text-decoration: none;
    font-size: 0.95rem;
  }
  
  nav a:hover {
    color: #58a6ff;
  }
  
  .hero {
    text-align: center;
    padding: 100px 20px;
  }
  
  .hero h1 {
    font-size: 2.8rem;
    margin-bottom: 20px;
  }
  
  .hero p {
    color: #9aa4b2;
    max-width: 600px;
    margin: 0 auto 30px;
  }
  
  .btn {
    background-color: #238636;
    color: white;
    padding: 12px 28px;
    border-radius: 6px;
    font-size: 1rem;
    text-decoration: none;
  }
  
  .btn:hover {
    background-color: #2ea043;
  }
  
  .features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 20px;
    padding: 60px 10%;
  }
  
  .card {
    background-color: #161b22;
    padding: 25px;
    border-radius: 10px;
    border: 1px solid #1f2937;
    text-align: center;
  }
  
  .card h3 {
    margin-bottom: 10px;
    color: #58a6ff;
  }
  
  footer {
    text-align: center;
    padding: 25px;
    border-top: 1px solid #1f2937;
    color: #8b949e;
    font-size: 0.9rem;
  }