/* lazy */ img { display: block; margin: 20px auto; max-width: 100%; height: auto; opacity: 0; transition: opacity 0.5s ease-in-out; } img.loaded { opacity: 1; } .button-container { margin-top: 20px; text-align: center; } .button-container a { display: inline-block; padding: 10px 20px; margin: 0 10px; background-color: #007BFF; color: #ffffff; text-decoration: none; border: none; border-radius: 4px; cursor: pointer; font-size: 16px; } .button-container a.next { background-color: #28a745; }