bikes-and-trikes.css

 body {
     background-color: whitesmoke;
     font-family: Arial, sans-serif;
 }

 .jumbotron {
     background-color: #f8f9fa;
     padding: 2em;
     text-align: center;
 }

 .jumbotron h1 {
     font-size: 3em;
 }

 .jumbotron h3 {
     font-size: 2em;
 }

 .container {
     display: flex;
     flex-wrap: wrap;
     justify-content: space-around;
     margin: 2em auto;
     width: 90%;
 }

 .panel {
     border: 1px solid #ddd;
     border-radius: 5px;
     background-color: white;
     margin: 1em;
     flex: 1 1 30%;
     max-width: 30%;
 }

 .panel-heading {
     background-color: #007bff;
     color: white;
     padding: 1em;
     border-bottom: 1px solid #ddd;
     text-align: center;
     font-size: 1.5em;
 }

 .panel-body {
     padding: 1em;
     text-align: center;
 }

 .panel-body img {
     width: 80%;
     height: auto;
 }

 .panel-footer {
     background-color: #f8f9fa;
     padding: 1em;
     text-align: center;
     border-top: 1px solid #ddd;
 }

 .panel-footer a {
     text-decoration: none;
     color: #007bff;
 }

 .foot {
     color: white;
     background-color: rgba(0, 0, 0, 0.783);
     padding: 1em;
     text-align: center;
 }

 footer {
     margin-top: 2em;
 }