 /* Same styling for layout */
 * {
     margin: 0;
     padding: 0;
     box-sizing: border-box;
 }

 body {
     font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
     background-color: #f5f7fa;
     color: #333;
     padding: 30px 0;
 }

 .container {
     width: 90%;
     max-width: 700px;
     margin: auto;
     background-color: #fff;
     padding: 40px;
     border-radius: 12px;
     box-shadow: 0 8px 20px rgba(0, 0, 0, 0.08);
 }

 h2 {
     text-align: center;
     margin-bottom: 30px;
     font-size: 28px;
     color: #2c3e50;
 }

 form {
     display: flex;
     flex-direction: column;
 }

 label {
     margin-top: 15px;
     margin-bottom: 6px;
     font-weight: 600;
     color: #333;
 }

 input[type="number"] {
     padding: 10px 12px;
     border: 1px solid #ccc;
     border-radius: 6px;
     font-size: 16px;
 }

 input[type="number"]:focus {
     border-color: #007BFF;
     outline: none;
 }

 button[type="submit"] {
     margin-top: 30px;
     padding: 12px;
     background-color: #007BFF;
     border: none;
     border-radius: 6px;
     color: white;
     font-size: 18px;
     cursor: pointer;
 }

 button[type="submit"]:hover {
     background-color: #0056b3;
 }

 /* Back button styling */
 .back-btn {
     display: inline-block;
     margin-bottom: 20px;
     padding: 10px 18px;
     background: #6c757d;
     color: white;
     font-size: 15px;
     font-weight: 600;
     border-radius: 6px;
     text-decoration: none;
     transition: background 0.3s ease;
 }

 .back-btn:hover {
     background: #5a6268;
 }

 @media (max-width: 600px) {
     .container {
         padding: 20px;
     }

     h2 {
         font-size: 22px;
     }

     input[type="number"] {
         font-size: 15px;
     }

     button[type="submit"] {
         font-size: 16px;
     }
 }