* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
  }
  body {
    font-family: sans-serif;
    font-size: 16px;
  }
  header {
    background-color: #000;
    color: #fff;
    padding: 20px;
  }
  h1 {
    font-size: 24px;
    margin-top: 0;
  }
  nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
  }
  nav a {
    padding: 10px;
    text-decoration: none;
    color: #fff;
  }
  nav a:hover {
    background-color: #ddd;
  }
  main {
    padding: 20px;
  }
  section {
    margin-bottom: 20px;
  }
  h2 {
    margin-top: 0;
  }
  form {
    margin-top: 20px;
  }
  input {
    width: 100%;
    padding: 10px;
    border: 1px solid #ccc;
    border-radius: 5px;
  }
  button {
    background-color: #000;
    color: #fff;
    padding: 10px;
    border: none;
    border-radius: 5px;
    cursor: pointer;
  }
  footer {
    background-color: #000;
    color: #fff;
    padding: 20px;
    text-align: center;
  }