:root {
    --black: #1A1A1A;
    --white: #F4F8FD;
    --grey: #565B61;
    --grey-blue: #334B6D;
    --dark-blue: #2D3459;
    --blue: #5577AA;
    --light-blue: #D8E2EF;
    --orange: #E6642F;
    --light-orange: #EC946F;
    --mango: #EB9526;
    --banana: #EFB250;
  }
  
  body {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    text-align: center;
    font-family: 'Montserrat', sans-serif;
    font-size: 16px;
    background: var(--white);
    color: var(--black);
  }
  
  .container {
    width: 100%;
    max-width: 600px;
    padding: 0 20px;
  }
  
  h1 {
    font-size: 24px;
    margin-bottom: 20px;
  }
  
  .form-group {
    margin-bottom: 20px;
    text-align: left;
  }
  
  label {
    display: block;
    font-weight: bold;
    margin-bottom: 5px;
  }
  
  textarea {
    width: 90%;
    padding: 10px;
    border: 1px solid var(--grey);
    border-radius: 4px;
    background-color: var(--light-blue);
    color: var(--black);
    font-family: 'Montserrat', sans-serif;
    font-size: 16px;
    resize: vertical;
  }
  
  textarea:hover,
  textarea:focus {
    outline: none;
    box-shadow: 0 0 5px var(--blue);
  }
  
  .button {
    display: inline-block;
    padding: 10px 20px;
    border: none;
    border-radius: 4px;
    background-color: var(--blue);
    color: var(--white);
    font-family: 'Montserrat', sans-serif;
    font-size: 16px;
    cursor: pointer;
    transition: background-color 0.3s ease;
  }
  
  .button:hover {
    background-color: var(--dark-blue);
  }
  
  .copy-btn {
    margin-left: 10px;
  }
  
  .replace-item {
    margin-bottom: 5px;
  }
  
  #mapping-table {
    width: 100%;
    border-collapse: collapse;
  }
  
  #mapping-table th,
  #mapping-table td {
    padding: 8px;
    border-bottom: 1px solid var(--grey);
  }
  
  #mapping-table th {
    background-color: var(--light-blue);
    font-weight: bold;
  }
  
  #mapping-table td {
    text-align: left;
  }
  
  .alert {
    padding: 10px;
    border-radius: 4px;
    background-color: var(--light-orange);
    color: var(--black);
    font-family: 'Montserrat', sans-serif;
    font-size: 16px;
    margin-bottom: 10px;
  }
  
  .alert.success {
    background-color: var(--light-blue);
    color: var(--black);
  }
  
  /* Responsive Design */
  
  @media only screen and (max-width: 600px) {
    .container {
      padding: 0 10px;
    }
  
    h1 {
      font-size: 20px;
    }
  
    textarea {
      font-size: 14px;
    }
  
    .button {
      font-size: 14px;
    }
  
    #mapping-table th,
    #mapping-table td {
      padding: 6px;
    }
  }