body {
    font-family: sans-serif;
    margin: 0;
    padding: 0;
    background: #f5f5f5;
    text-align: center;
  }
  
  header {
    background: #257cff;
    color: white;
    padding: 1rem;
    text-align: center;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
  }
  
  nav {
    background: #56cfff;
    padding: 1rem;
    text-align: center;
    position: fixed;
    top: 115px;
    left: 0;
    width: 100%;
    z-index: 999;
  }
  
  nav a {
    color: rgb(0, 0, 0);
    margin: 0 10px;
    text-decoration: none;
  }
  
  section {
    padding: 120px 2rem 2rem;
  }
  
  h2 {
    color: #333;
  }
  
  .redmsg {
      color: red;
      font-weight: bold;
  }
  
  .note {
    background: white;
    padding: 1rem;
    margin: 1rem 0;
    border-radius: 5px;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
  }
  
  .copy-btn {
    background-color: #4CAF50;
    color: white;
    border: none;
    padding: 8px 16px;
    cursor: pointer;
    border-radius: 5px;
    margin-top: 10px;
  }
  
  .copy-btn:hover {
    background-color: #45a049;
  }
  
  .imgresponsive {
    width: 100%;
    height: auto;
  }
  
  .footer {
      position: fixed;
      left: 0;
      bottom: 0;
      padding-left: 3px;
      color: white;
      background-color: #555555;
      width: 100%;
      text-align: center;
  }
  
  pre {
    background-color: #f0f0f0;
    padding: 10px;
    border-radius: 5px;
    font-size: 16px;
    font-family: monospace;
    white-space: pre-wrap;
    word-wrap: break-word;
    margin-bottom: 10px;
  }
  
  .toast {
  position: fixed;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  background-color: #4CAF50;
  color: white;
  padding: 10px 20px;
  border-radius: 8px;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
  opacity: 0;
  transition: opacity 0.3s ease;
  z-index: 9999;
  }
  
    select {
        font-size: 18px;
        padding: 8px;
    }
    
    img {
        display: block;
        max-width: 99%;
        margin: 20px auto;
    }
    
    #errorMessage {
      color: red;
      margin-top: 20px;
    }
    #errorBox {
  text-align: center;
    }
    #errorBox p {
  font-size: 18px;
    }