body {
    margin: 0;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: #121212;
    color: #eee;
    line-height: 1.6;
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 20px;
    min-height: 100vh;
  }
  main {
    max-width: 700px;
    width: 100%;
  }
  img.logo {
    display: block;
    max-width: 150px;
    margin: 0 auto 30px;
  }
  h1, h2 {
    color: #f5f5f5;
    text-align: center;
    margin-bottom: 10px;
  }
  p, ul {
    text-align: center;
    font-size: 1rem;
    margin-bottom: 1.2em;
  }
  ul {
    padding-left: 20px;
  }
  strong {
	text-align: center;
    color: #ffa500;
  }
  a {
    color: #1e90ff;
    text-decoration: none;
  }
  a:hover {
    text-decoration: underline;
  }
  @media (max-width: 480px) {
    body {
      padding: 15px 10px;
    }
    img.logo {
      max-width: 120px;
	  margin-bottom: 20px;
    }
    p, ul {
	  text-align: center;
      font-size: 0.9rem;
    }
  }
  
  /* Top navigation bar styling */
.topnav {
  background-color: #333;
  overflow: hidden;
}

.topnav a {
  float: left;
  display: block;
  color: #f2f2f2;
  text-align: center;
  padding: 14px 16px;
  font-size: 17px;
}

.topnav a:hover {
  background-color: #ddd;
  color: black;
}

.topnav a.active {
  background-color: #04AA6D;
  color: white;
}

.topnav .icon {
  display: none;
}

/* Responsive menu for smaller screens */
@media screen and (max-width: 600px) {
  .topnav a:not(:first-child) {
    display: none;
  }
  .topnav a.icon {
    float: right;
    display: block;
  }
}

@media screen and (max-width: 600px) {
  .topnav.responsive {
    position: relative;
  }
  .topnav.responsive .icon {
    position: absolute;
    right: 0;
    top: 0;
  }
  .topnav.responsive a {
    float: none;
    display: block;
    text-align: left;
  }
}