.app { padding: 20px; height: 100vh; } h1 { margin-bottom: 20px; color: #2c3e50; } .container { background: white; border-radius: 8px; padding: 30px; box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1); text-align: center; } button { margin-top: 20px; padding: 10px 20px; font-size: 16px; background-color: #007bff; color: white; border: none; border-radius: 4px; cursor: pointer; transition: background-color 0.3s; } button:hover { background-color: #0056b3; } button:active { transform: scale(0.98); }