body, html {
    padding: 0;
    margin: 0;
    font-family: sans-serif;
    line-height: 1.6;
    font-size: 18px;
  }
  
  * {
    box-sizing: border-box;
  }
  
  a {
    color: #0070f3;
    text-decoration: none;
  }
  
  a:hover {
    text-decoration: underline;
  }
  
  img {
    max-width: 100%;
    display: block;
    border-radius: 50%;
    box-shadow: 0 0 20px 10px rgba(255, 0, 0, 0.8);
  }
  
  blockquote {
    border-left: 10px solid #8cb2ff;
    margin: 1.5em 10px;
    padding: 0.1em 15px;
  }
  
  code {
    background: #f9f9f9;
    padding: 5px;
  }
  
  .centerdiv {
    display: flex;
    flex-direction: column;
    justify-content: center; 
    align-items: center;
    width: 80%; 
    margin: 0 auto; 
    min-height: 100vh;
    text-align: center; 
  }
  
  .centerdiv * {
    margin: 10px 0;
  }
  
  hr {
    width: 80%;
    border: 1px solid #FFD700;
    margin: 20px 0;
  }
  
  @media (prefers-color-scheme: dark) {
    html {
      background-color: #111;
      color: #e0e0e0;
    }
  
    a {
      color: #FFD700;
    }
  
    blockquote {
      border-left: 10px solid #a6f;
    }
  
    code {
      background: rgb(38, 38, 38);
      color: #fff;
    }
  
    hr {
      border-color: #FFD700;
    }
  }
  
  footer {
    color: white;
    padding: 20px;
    text-align: center;
    font-size: 1rem;
  }
  
  h1 {
    font-size: 2em;
    margin-top: 20px;
  }

._hidden{
  display: none;
}