html {
    scroll-behavior: smooth;
  }
  
  body {
    font-family: Arial, sans-serif;
    text-align: center;
    background-color: #0f0f0f;
    padding: 20px;
  }
  
  header {
    background-image: linear-gradient(rgba(0, 0, 0, 0.6), rgba(0, 0, 0, 0.6)), url('cute_robot.png');
    background-attachment: fixed;
    background-size: cover;
    background-position: center;
    height: 80vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    margin-bottom: 30px;
    color: #ffffff;
  }
  
  h1 {
    font-size: 2rem;
    margin-bottom: 10px;
    text-shadow: 0 0 5px #00ffff;
  }
  
  form {
    display: inline-block;
    margin-top: 20px;
    opacity: 0;
    animation: fadeIn 1s ease-in 1s forwards;
  }
  
  input[type="email"] {
    padding: 10px;
    border: 2px solid #00ffff;
    font-size: 1rem;
    outline: none;
    background-color: rgba(255, 255, 255, 0.8);
    color: #1f222b;
    width: 100%;
    box-sizing: border-box;
  }
  
  button[type="submit"] {
    display: block;
    padding: 10px 20px;
    font-size: 1rem;
    background-color: #00ffff;
    color: #000000;
    border: none;
    cursor: pointer;
    margin-top: 10px;
    width: 100%;
  }
  
  button[type="submit"]:hover {
    background-color: rgba(0, 255, 255, 0.8);
  }
  
  @keyframes fadeIn {
    0% {
      opacity: 0;
    }
    100% {
      opacity: 1;
    }
  }
  
  @media screen and (min-width: 768px) {
    body {
      padding: 50px;
    }
    
    header {
      height: 100vh;
    }
  
    h1 {
      font-size: 2.5rem;
    }
  
    input[type="email"] {
      width: auto;
    }
  
    button[type="submit"] {
      display: inline-block;
      margin-top: 0;
      margin-left: 10px;
      width: auto;
    }
  }

  section {
    background-color: #1f1f1f;
    padding: 40px 0;
  }
  
  h2 {
    font-size: 2rem;
    color: #00ffff;
    text-shadow: 0 0 5px #00ffff;
    margin-bottom: 20px;
  }

  h3 {
    font-size: 1rem;
    color: #00ffff;
    text-shadow: 0 0 5px #00ffff;
    margin-bottom: 20px;
  }
  
  ul {
    list-style-type: none;
    padding: 0;
    font-size: 1.2rem;
  }
  
  ul li {
    margin-bottom: 10px;
    color: #ffffff;
    text-shadow: 0 0 5px #00ffff;
  }
  
  @media screen and (min-width: 768px) {
    h2 {
      font-size: 2.5rem;
    }
  }

  .thank-you-container {
    background-color: #ffebcc;
    text-align: center;
    padding: 2rem;
    border-radius: 10px;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
  }