body {
    font-family: Arial, sans-serif;
    background-color: #f4f4f4;
    margin: 0;
    padding: 0;
  }
  
  .header {
    background-color: #4CAF50;
    color: white;
    padding: 20px;
    text-align: center;
  }
  
  h1 {
    margin: 0;
  }
  
  .container {
    max-width: 1000px;
    margin: 20px auto;
    padding: 20px;
    background-color: white;
    box-shadow: 0 0 10px rgba(0,0,0,0.1);
  }
  
  h2 {
    color: #333;
  }
  
  .book-list {
    display: flex;
    flex-wrap: wrap;
    gap: 20px;
  }
  
  .book {
    flex: 1 1 calc(25% - 20px);
    background-color: #e7f3e7;
    padding: 10px;
    border-radius: 5px;
    box-sizing: border-box;
  }
  
  .book h3 {
    margin-top: 0;
  }
  
  .form-section {
    margin-top: 30px;
  }
  
  form {
    display: flex;
    flex-direction: column;
  }
  
  label {
    margin-top: 10px;
  }
  
  input, select, textarea {
    padding: 8px;
    margin-top: 5px;
    border-radius: 4px;
    border: 1px solid #ccc;
  }
  
  button {
    margin-top: 15px;
    padding: 10px;
    background-color: #4CAF50;
    color: white;
    border: none;
    border-radius: 4px;
    cursor: pointer;
  }
  
  button:hover {
    background-color: #45a049;
  }
  
  .footer {
    background-color: #333;
    color: white;
    text-align: center;
    padding: 15px;
    margin-top: 40px;
  }
  .trolai{
   
    margin-top: 15px;
    padding: 10px;
    background-color: #ff00aa;
    color: rgb(47, 0, 255);
    border: none;
    border-radius: 4px;
    cursor: pointer;
   
  }
  .trolai:hover{
    background-color: #ff9900;
  }
.b1{
    text-decoration: none;
}