* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: Arial, sans-serif;
  }
  
  body {
    background: #fff;
    color: #111;
  }
  
  /* NAV */
  .navbar {
    position: fixed;
    top: 0;
    width: 100%;
    background: rgba(255,255,255,0.9);
    backdrop-filter: blur(10px);
    display: flex;
    justify-content: space-between;
    padding: 15px 40px;
    border-bottom: 1px solid #eee;
  }
  
  .navbar a {
    margin-left: 20px;
    text-decoration: none;
    color: #111;
  }
  
  /* HERO */
  .hero {
    height: 100vh;
    background: linear-gradient(135deg, #111, #444);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
  }
  
  .hero h1 {
    font-size: 40px;
    animation: fadeIn 1.5s ease;
  }
  
  .btn {
    display: inline-block;
    margin-top: 20px;
    padding: 12px 25px;
    background: white;
    color: black;
    text-decoration: none;
    transition: 0.3s;
  }
  
  .btn:hover {
    transform: scale(1.05);
  }
  
  /* SECTIONS */
  .section {
    padding: 80px 20px;
    text-align: center;
  }
  
  .section.dark {
    background: #111;
    color: white;
  }
  
  .grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px,1fr));
    gap: 20px;
    margin-top: 30px;
  }
  
  .card {
    background: #f5f5f5;
    padding: 30px;
    border-radius: 10px;
    transition: 0.3s;
  }
  
  .card:hover {
    transform: translateY(-10px);
  }
  
  /* FORM */
  form {
    display: flex;
    flex-direction: column;
    max-width: 400px;
    margin: auto;
  }
  
  input, textarea {
    margin: 10px 0;
    padding: 10px;
    border: none;
  }
  
  button {
    padding: 12px;
    background: white;
    border: none;
    cursor: pointer;
  }
  
  /* ANIMATION */
  @keyframes fadeIn {
    from {opacity: 0; transform: translateY(20px);}
    to {opacity: 1; transform: translateY(0);}
  }