body {
    font-family: Arial, sans-serif;
    background: #f7f7f7;
    padding: 20px;
  }
  /* Modal overlay */
  .modal {
    display: block;
    position: fixed; 
    top: 0; left: 0; right: 0; bottom: 0;
    background-color: rgba(0,0,0,0.3);
    justify-content: center;
    align-items: center;
    z-index: 9999;
  }
  /* Modal content box */
  .modal-content {
    background: #fff;
    padding: 20px;
    max-width: 600px;
    width: 90%;
    border-radius: 8px;
    position: relative;
    box-shadow: 0 2px 10px rgba(0,0,0,0.2);
  }
  /* Header */
  h2 {
    margin-top: 0;
    margin-bottom: 15px;
  }
  /* Form styles */
.form-group {
  display: flex;
  flex-direction: column;
  margin-bottom: 15px;
}
.form-label {
  font-weight: bold;
  margin-bottom: 5px;
}
input[type="text"], input[type="number"], input[type="email"], select {
  padding: 8px;
  font-size: 14px;
  border: 1px solid #ccc;
  border-radius: 4px;
}
input[type="text"]:focus, input[type="number"]:focus, input[type="email"]:focus, select:focus {
  outline: none;
  border-color: #66afe9;
  box-shadow: 0 0 5px rgba(102,175,233,.6);
}
/* Button styles */
button {
  padding: 10px 20px;
  font-size: 14px;
  border: none;
  border-radius: 4px;
  cursor: pointer;
  margin-left: 10px;
}
.btn-cancel {
  background-color: #d9534f;
  color: #fff;
}
.btn-submit {
  background-color: #f0ad4e;
  color: #fff;
}
.btn-submit:hover {
  background-color: #ec971f;
}
.btn-cancel:hover {
  background-color: #c9302c;
}
/* Required field indicator */
.required:after {
  content: " *";
  color: red;
}
/* Required field indicator */
.inline-flex {
  display: flex;
  align-items: left;
}

/* Checkbox label style */
  .checkbox-label {
    display: flex;
    align-items: center;
    margin-bottom: 10px;
  }
  /* Container for the section to show/hide */
  #markupSection {
    display: none;
    background: #fff;
    padding: 15px;
    border-radius: 4px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
    max-width: 600px;
  }
  /* Form rows */
  .form-row {
    display: flex;
    align-items: center;
    margin-bottom: 10px;
  }
  /* Labels inside form rows */
  .form-label {
    width: 150px;
    font-weight: bold;
  }
  /* Inputs and select */
  input[type="number"] {
    width: 80px;
    padding: 6px;
    margin-right: 8px;
    text-align: right;
  }
  select {
    padding: 6px;
  }
  /* Buttons */
  .btn {
    padding: 8px 16px;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: 14px;
  }
  #calculateBtn {
    background-color: #4CAF50;
    color: white;
    margin-top: 10px;
  }
  #calculateBtn:hover {
    background-color: #45a049;
  }
  /* Output fields */
  .output-box {
    margin-top: 10px;
    padding: 10px;
    background: #e0e0e0;
    border-radius: 4px;
    font-weight: bold;
    font-size: 14px;
  }
  /* Action buttons */
  .action-buttons {
    margin-top: 20px;
    display: flex;
    justify-content: flex-end;
    gap: 10px;
  }
  .btn-cancel {
    background-color: #d9534f;
    color: white;
  }
  .btn-submit {
    background-color: #f0ad4e;
    color: white;
  }
  .btn-cancel:hover {
    background-color: #c9302c;
  }
  .btn-submit:hover {
    background-color: #ec971f;
  }