/* =============== 
   Mobile-First 
   =============== */

   html {
    box-sizing: border-box;
    /* Set a comfortable base font size (16px is standard) */
    font-size: 16px; 
  }
  
  *, *:before, *:after {
    box-sizing: inherit;
  }
  
  body {
    margin: 0;
    padding: 0;
    font-family: Arial, sans-serif;
    background-color: #f3f3f3;
    color: #333;
  }
  
  /* Header & Footer */
  header, footer {
    text-align: center;
    background-color: #1565c0;
    color: #fff;
    padding: 1rem;
  }
  
  main {
    /* For mobile: full width with small side padding */
    width: 100%;
    padding: 1rem;
    background-color: #fff;
    min-height: 80vh; /* ensure some body height */
  }
  
  /* Sections */
  section {
    margin-bottom: 2rem;
  }
  
  /* Buttons */
  button {
    padding: 0.75em 1.2em;
    background-color: #1565c0;
    color: #fff;
    border: none;
    border-radius: 4px;
    font-size: 1rem;
    cursor: pointer;
    margin: 0.25rem 0;
  }
  
  button:disabled {
    background-color: #999;
    cursor: not-allowed;
  }
  
  .btn-group {
    display: flex;
    gap: 0.5rem;
    margin-bottom: 1rem;
    flex-wrap: wrap; /* so they stack on tiny screens if needed */
  }
  
  /* Textarea */
  textarea {
    width: 100%;
    padding: 0.75rem;
    border-radius: 4px;
    border: 1px solid #ccc;
    font-size: 1rem;
    margin-bottom: 1rem;
    min-height: 120px;
  }
  
  /* ===============
     Larger screens
     =============== */
  @media (min-width: 768px) {
    main {
      max-width: 700px;
      margin: 2rem auto; 
      border-radius: 8px;
    }
  
    header, footer {
      padding: 1.5rem;
    }
  
    button {
      font-size: 1rem;
    }
  }