/* Reset some default styles */
    * {
      margin: 0;
      padding: 0;
      box-sizing: border-box;
    }

 /* Body background with repeated texture image from disk */
    body {
      font-family: Arial, sans-serif;
      background-color: #f0f0f0;
    }

    /* Centered container for site content */
    .container {
      max-width: 960px;
      margin: 0 auto;
      background-color: #fff;
      min-height: 100vh;
      box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
            line-height: 1.6; /* Improved line spacing for readability */
    }

    #content h2,h3 {
            padding-bottom: 1em; /* Improved line spacing for readability */
            padding-top: 1em; /* Improved line spacing for readability */
    }

    /* Updated Header Styles Using Flex */
    header {
      display: flex;
      flex-wrap: wrap;
      align-items: center;
      background-color: #333;
      color: #fff;
      padding: 1em;
    }

    header h1 {
      flex: 1;
      margin: 0;
      font-size: 1.5em;
    }

    nav {
      flex: 2;
    }

    nav ul {
      list-style: none;
      display: flex;
      flex-wrap: wrap;
      justify-content: flex-end;
      margin: 0;
      padding: 0;
    }

    nav ul li {
      margin: 0 5px;
    }

    nav ul li a {
      display: block;
      padding: 0.5em 1em;
      color: #fff;
      text-decoration: none;
    }

    nav ul li a.active,
    nav ul li a:hover {
      background-color: #555;
      border-radius: 4px;
    }

    /* Main content area styles */
    #content {
      padding: 3em;
    }

    #content li {
      padding-bottom: 0.5em;
    }

    #logo {
      height:auto;
      width:10em;
      margin-left:1em;
      margin-right:4em;
      margin-bottom:0em;
    }

    /* Responsive styles for mobile devices */
    @media (max-width: 600px) {
      header {
        flex-direction: column;
        align-items: center;
      }
      nav ul {
        justify-content: center;
      }
      #logo {
        height:auto;
        width:15em;
        margin-bottom:3em;
        margin-left:0em;
        margin-right:0em;
      }
    }

    /* Screenshot image styles */
    .screenshot {
      max-width: 100%;
      height: auto;
      margin: 1em 0;
      object-fit: contain;
    }

    /* Responsive embedded YouTube video container (16:9 aspect ratio) */
    .video-container {
      position: relative;
      padding-bottom: 56.25%;
      padding-top: 25px;
      height: 0;
      margin: 1em 0;
    }

    .video-container iframe {
      position: absolute;
      top: 0;
      left: 0;
      width: 100%;
      height: 100%;
    }

.center {
  display: block;
  margin-left: auto;
  margin-right: auto;
  width: 50%;
}

    .note {
      background: #fff3cd;
      border: 1px solid #ffeeba;
      padding: 10px 15px;
      margin-top: 25px;
      border-radius: 5px;
      color: #856404;
    }