A nav containing a cyan button with radial-gradient(circle, pink, purple) background that says 'Hello World', followed by a small text description, with bounce.
<header><button style='background-color: linear-gradient(to right, red, yellow); font-size: 16px; animation: slide-up 2s;'>Sign Up</button><p style='font-size: 16px;'>login</p></header> @keyframes bounce { 0%, 20%, 50%, 80%, 100% { transform: translateY(0); } 40% { transform: translateY(-30px); } 60% { transform: translateY(-15px); } } transition: transform 0.2s ease-in-out;