style.css

* {
    padding: 0;
    margin: 0;
    box-sizing: border-box;
    font-family: sans-serif;
  }
  .intro {
    background: #eaf0f1;
  }
  h1 {
    color: #4c4b4b;
    font-weight: bold;
    transition: 0.5s;
  }
  h3 {
    color: #2f363f;
  }
  button {
    border: none;
    padding: 10px;
    background: #7b8788;
    color: white;
    letter-spacing: 1.5px;
    font-size: 15px;
    transition: 0.5s;
  }
  button:hover,
  h1:hover {
    transform: scale(1.1);
  }
  button:hover {
    background-color: #4c4b4b;
  }
  footer {
    color: #586776;
    background-color: #eaf0f1;
    letter-spacing: 0.5px;
  }
  footer p {
    margin: 0;
    font-size: 15px;
  }
  @media only screen and (orientation: portrait) {
    .intro {
      display: flex;
      flex-direction: column-reverse;
    }
    h1 {
      font-size: 30px;
    }
    .act {
      padding-bottom: 100px;
    }
  }