body {
    margin: 0;
    font-family: Arial, sans-serif;
    display: flex;
  }
  #header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background-color: #f4f4f4;
    padding: 10px 10px;
    z-index: 1000;
    height: 120px;
  }
  #header img {
    float: left;
    width: 110px;
    height: 110px;
    background: #555;
    border-radius: 10%;
  }
  #header h1 {
    position: relative;
    top: 2px;
    left: 10px;
    font-size: 38px;
  }
  #sidebar {
    width: 15%;
    background-color: #f4f4f4;
    padding: 10px;
    top: 110px;
    height: 100%;
    overflow-y: auto;
    position: fixed;
  }
  #content {
    position: relative;
    margin-left: 15%;
    width: 85%;
    max-width: 700px;
    top: 100px;
    padding: 30px 30px;
  }
  section {
    padding-top: 120px;
    margin-top: -120px;
  }
  h1, h2, h3 {
    margin-top: 10;
  }
  a {
    text-decoration: none;
    color: #007BFF;
  }
  a:hover {
    text-decoration: underline;
  }
  @media (max-width: 800px) {
    #sidebar {
      display: none;
      width: 0%;
    }

    #content {
      margin-left: 0%;
      width: 100%;
    }
  }