/* Reset some default browser styles */
body, h1, h3, p {
    margin: 0;
    padding: 0;
    font-family: Arial, sans-serif;
    box-sizing: border-box;
  }
  
  body {
    background-color: #f0f4f8;
    color: #333;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    padding: 20px;
  }
  
  main {
    width: 100%;
    max-width: 500px;
    background-color: #ffffff;
    border-radius: 8px;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.1);
    overflow: hidden;
  }
  
  .container {
    padding: 20px;
  }
  
  h1 {
    text-align: center;
    color: #007bff;
    font-size: 2rem;
    margin-bottom: 20px;
  }
  
  form {
    display: flex;
    flex-direction: column;
    gap: 10px;
  }
  
  fieldset {
    border: 1px solid #ccc;
    border-radius: 5px;
    padding: 15px;
  }
  
  legend {
    padding: 0 10px;
    font-weight: bold;
    color: #007bff;
  }
  
  .form_input {
    display: flex;
    flex-direction: column;
    margin-bottom: 20px;
  }
  
  label {
    font-size: 1rem;
    font-weight: bold;
  }
  
  input {
    padding: 10px;
    font-size: 1rem;
    border: 1px solid #ccc;
    border-radius: 5px;
  }
  
  button {
    background-color: #007bff;
    color: #ffffff;
    padding: 10px 15px;
    font-size: 1rem;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    transition: background-color 0.3s ease;
  }
  
  button:hover {
    background-color: #0056b3;
  }
  
  #result {
    margin-top: 15px;
    font-size: 1.2rem;
    text-align: center;
    font-weight: bold;
  }
  
  #result span {
    color: #007bff;
  }
  
  #weight-guide {
    margin-top: 20px;
    padding: 15px;
    background-color: #f8f9fa;
    border: 1px solid #ddd;
    border-radius: 5px;
  }
  
  #weight-guide h3 {
    margin-bottom: 10px;
    color: #333;
    font-size: 1.2rem;
    text-align: center;
  }
  
  #weight-guide p {
    font-size: 1rem;
    margin: 5px 0;
  }
  #weight-guide{
    text-align: center;
  }