@media (max-width: 600px) {
         header {
             flex-direction: column;
             margin-bottom: 10px;
         }

         .popup-card {
             max-width: 100%;
             height: 100%;
             border-radius: 0;
         }

         .popup-body {
             padding: 1rem;
             flex: 1;
             overflow-y: auto;
         }

         .popup-poster img {
             max-height: 250px;
             object-fit: cover;
         }
     }