body {
     font-family: Arial, sans-serif;
     max-width: 800px;
     margin: 40px auto;
     padding: 20px;
     background-color: #f4f4f4;
     color: #333;
 }

 h1 {
     text-align: center;
     color: #12A493;
     margin-bottom: 40px;
 }

 details {
     background: #fff;
     border: 1px solid #ddd;
     border-radius: 5px;
     padding: 15px;
     margin-bottom: 15px;
 }

 summary {
     font-weight: bold;
     cursor: pointer;
     color: #12A493;
     font-size: 16px;
     outline: none;
 }

 summary:hover {
     text-decoration: underline;
 }

 details[open] {
     box-shadow: 0 0 5px rgba(0, 0, 0, 0.1);
 }

 p {
     margin-top: 10px;
     font-size: 15px;
 }