body{background-color: #a1cae2;
background-image: url('ff.jpg');
background-size: cover;
padding: 0;
margin: 0;}

.ca{display: flex;justify-content: center;}
 .card{margin: 4px;margin-bottom: 20px;box-shadow:-1px 1px 5px  #555;}
 .card img{height: 240px;}
 .card-body{background-color: #03506f;opacity: 0.8;}
 .card-text{color: white;font-weight: bold;font-family:serif;text-align: center;}
 .end{background-color:#555;text-align: center;font-weight: bold;color:  f6f5f5;opacity: 0.8;}