#back-to-top { position: fixed; bottom: 20px; right: 20px; background-color: #007bff; color: white; border: none; padding: 10px 20px; font-size: 16px; border-radius: 5px; cursor: pointer; box-shadow: 0px 4px 6px rgba(0, 0, 0, 0.1); transition: opacity 0.3s ease; } #back-to-top:hover { background-color: #0056b3; }