* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
  }
  
  body {
    font-family: Arial, sans-serif;
    font-size: 16px;
    background-color: #1e1e1e; /* Dark background */
    color: #f5f5f5; /* Light text for contrast */
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    margin: 0;
  }
  
  /* Navbar Styling */
  nav {
    background-color: #333;
    padding: 0.75rem;
    display: flex;
    justify-content: center;
    gap: 2rem;
    position: fixed;
    top: 0;
    width: 100%;
  }
  
  nav a {
    color: #f5f5f5;
    text-decoration: none;
    font-size: 1rem; /* Reduced font size */
    transition: color 0.3s ease;
  }
  
  nav a:hover {
    color: #ffda44;
  }
  
  nav a[aria-current="page"] {
    color: #ffda44;
    font-weight: bold;
  }
  
  .container {
    width: 80%;
    max-width: 31.25rem; /* Reduced max-width for a more compact box */
    background-color: #2e2e2e; /* Dark container */
    padding: 1.5rem; /* Reduced padding */
    border-radius: 1rem;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.5);
    margin-top: 100px; /* Spacing for navbar */
  }
  
  h1 {
    font-size: 1rem; /* Reduced font size */
    text-align: center;
    margin-bottom: 1rem;
    color: #ffda44; /* Accent color for heading */
  }
  
  form p {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 0.75rem; /* Reduced spacing */
  }
  
  label {
    font-size: 1rem; /* Reduced label size */
    color: #f5f5f5;
  }
  
  input[type="text"] {
    width: 55%; /* Adjusted input width */
    padding: 0.4rem; /* Reduced padding */
    font-size: 0.9rem; /* Reduced font size */
    background-color: #444;
    border: 1px solid #666;
    border-radius: 0.5rem;
    color: #f5f5f5;
  }
  
  input[type="text"]::placeholder {
    color: #ccc;
  }
  
  button {
    width: 100%;
    padding: 0.8rem; /* Reduced button padding */
    font-size: 1.2rem; /* Reduced font size */
    background-color: #007bff;
    color: #fff;
    border: none;
    border-radius: 0.5rem;
    cursor: pointer;
    margin-top: 1.2rem; /* Reduced margin */
    transition: background-color 0.3s ease;
  }
  
  button:hover {
    background-color: #0056b3;
  }
  
  #results {
    font-size: 1.5rem; /* Reduced font size */
    color: #ffda44;
    text-align: center;
    margin-top: 1rem; /* Reduced margin */
  }

  #bmi-result{
    font-size: 1rem; /* Reduced font size */
    color: #ffda44;
    text-align: center;
    margin-top: 1rem; /* Reduced margin */
  }
  
  #weight-guide {
    margin-top: 1.5rem; /* Reduced margin */
    padding: 1rem; /* Reduced padding */
    background-color: #3a3a3a;
    border-left: 4px solid #007bff;
    border-radius: 0.5rem;
  }
  
  #weight-guide h3 {
    font-size: 1.2rem; /* Reduced font size */
    margin-bottom: 0.75rem; /* Adjusted margin */
    color: #007bff;
  }
  
  #weight-guide p {
    font-size: 0.95rem; /* Reduced font size */
    margin: 0.4rem 0;
    color: #ddd;
  }
  
  /* Responsive Design */
  @media (max-width: 768px) {
    .container {
      width: 95%;
      padding: 1.2rem;
    }
  
    h1 {
      font-size: 1.4rem;
    }
  
    button {
      font-size: 1.1rem;
    }
  
    input[type="text"] {
      width: 100%;
      font-size: 0.9rem;
    }
  
    label {
      font-size: 0.9rem;
    }
  }