body {
      color: #1a3e5c;      /* deep blue text */
      font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
      margin: 0;
      padding: 0;
      line-height: 1.5;
    }
    header {
      background-color: #4a9de0; /* medium ocean blue */
      padding: 25px 20px;
      text-align: center;
      box-shadow: 0 3px 6px rgba(74, 157, 224, 0.6);
    }
    header h1 {
      margin: 0;
      font-size: 2.3rem;
      font-weight: 700;
      color: #fff;
      letter-spacing: 1px;
    }
    main {
      max-width: 850px;
      margin: 40px auto;
      padding: 0 20px;
    }
    h2 {
      color: #1a5a8a; /* darker blue accent */
      margin-top: 40px;
      margin-bottom: 18px;
    }
    p {
      font-size: 1rem;
      margin: 20px 0;
      color: #16425b;
    }
    ul {
      color: #236a8e;
      list-style-type: circle;
      margin-left: 22px;
      margin-bottom: 40px;
    }
    footer {
      background-color: #3a7bbf; /* deep ocean blue */
      text-align: center;
      padding: 15px 20px;
      font-size: 0.9rem;
      color: #cce6ff;
      margin-top: 70px;
      box-shadow: inset 0 2px 5px rgba(26, 62, 92, 0.6);
    }