body {
   background: url('../images/background.jpg') no-repeat center center fixed;
   background-size: cover;
   color: #fff;
   font-family: Arial, sans-serif;
   text-shadow: 1px 1px 2px #000;
}

.wrapper {
   background: rgba(0, 0, 0, 0.7);
   padding: 20px;
   border-radius: 10px;
   margin: 20px auto;
   max-width: 960px;
}

.btn {
   background: #4CAF50;
   color: white;
   padding: 15px 20px;
   text-decoration: none;
   border-radius: 5px;
   transition: background 0.3s;
}

.btn:hover {
   background: #45a049;
}