body {
 font-family: Arial, sans-serif;
 margin: 0;
 padding: 0;
 background-color: #f0f0f0;
}

.prose {
 max-width: 500px;
 margin: 0 auto;
 padding: 20px;
 background-color: white;
 border: 1px solid #ccc;
 box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.tips {
 font-size: 12px;
 text-align: center;
 color: #aaa;
}

.tips span {
 color: #008000;
 cursor: pointer;
}

.tips span:hover {
 color: #00b300;
}

.btn {
 display: inline-block;
 padding: 8px 12px;
 background-color: #007bff;
 border: 1px solid #007bff;
 border-radius: 5px;
 color: white;
 text-decoration: none;
 cursor: pointer;
}

.btn:hover {
 background-color: #0069d9;
 border-color: #0069d9;
}

.footer {
 margin-top: 20px;
 padding-top: 20px;
 border-top: 1px solid #999;
 text-align: center;
}

.footer p {
 margin-bottom: 0;
 font-size: 12px;
 color: #777;
}