body{margin:0;display:flex;place-items:center;min-width:320px;min-height:100vh;background-color:#f0f2f5;font-family:Segoe UI,Tahoma,Geneva,Verdana,sans-serif}#root{max-width:1280px;margin:0 auto;padding:2rem;text-align:center;width:100%}.guestbook-section{margin-top:40px;border-top:1px solid #eee;padding-top:30px}.guestbook-section h3{color:#333;margin-bottom:25px;font-size:1.8em}.message-form{display:flex;flex-direction:column;gap:15px;margin-bottom:30px}.message-form input[type=text],.message-form textarea{padding:12px;border:1px solid #ddd;border-radius:6px;font-size:1em;width:calc(100% - 24px);box-sizing:border-box}.message-form textarea{resize:vertical;min-height:80px}.message-form button{background-color:#28a745;color:#fff;padding:12px 25px;border:none;border-radius:6px;font-size:1.1em;cursor:pointer;transition:background-color .3s ease;align-self:flex-end}.message-form button:hover{background-color:#218838}.messages-list{margin-top:30px;text-align:left}.message-item{background-color:#f9f9f9;border:1px solid #eee;border-radius:8px;padding:15px;margin-bottom:15px;box-shadow:0 2px 4px #0000000d}.message-item p{margin:0 0 5px;color:#333;font-size:.95em}.message-item p.message-text{font-style:italic;color:#555}.message-item strong{color:#007bff}.message-item .message-timestamp{display:block;font-size:.8em;color:#888;margin-top:10px;text-align:right}.error-message{color:#dc3545;background-color:#f8d7da;border:1px solid #f5c6cb;border-radius:5px;padding:10px;margin-bottom:20px}.auth-section{text-align:center;margin-bottom:30px}.github-login-button{background-color:#24292e;color:#fff;padding:12px 25px;border:none;border-radius:6px;font-size:1.1em;cursor:pointer;transition:background-color .3s ease;display:inline-flex;align-items:center;gap:10px}.github-login-button:hover{background-color:#000}.logged-in-status{display:flex;align-items:center;justify-content:center;gap:20px;color:#333;font-size:1em}.logout-button{background-color:#dc3545;color:#fff;padding:8px 15px;border:none;border-radius:4px;cursor:pointer;transition:background-color .3s ease}.logout-button:hover{background-color:#c82333}.App{text-align:center;display:flex;flex-direction:column;align-items:center;justify-content:flex-start;min-height:100vh;padding:20px;box-sizing:border-box}.App-container{display:flex;flex-direction:column;gap:30px;align-items:center;max-width:800px;width:100%}