A medium header with blue text, Verdana font, 4px 4px 10px rgba(0, 0, 0, 0.5), and spin, displayed as flex with center, responsive with media queries.
<header style='color: cyan; font-size: 20px; font-family: Arial; box-shadow: none; display: inline-block; justify-content: space-around; animation: bounce 2s; transition: background-color 0.4s ease;'>Sign Up</header> @keyframes bounce { 0%, 20%, 50%, 80%, 100% { transform: translateY(0); } 40% { transform: translateY(-30px); } 60% { transform: translateY(-15px); } } @media (min-width: 600px) and (max-width: 1200px) { font-size: 16px; }