A green box with dashed border, linear-gradient(to bottom, blue, green) background, medium text centered inside, using block layout, with :hover { background-color: #555; color: white; } and spin.
<div style='background: radial-gradient(circle, pink, purple); border: 2px groove blue; font-size: 24px; text-align: center; display: none; justify-content: flex-start; align-items: center; animation: slide-up 2s; transition: background-color 0.4s ease; :hover { box-shadow: 0 0 10px rgba(0, 0, 0, 0.5); }'>Hello World</div> @keyframes bounce { 0%, 20%, 50%, 80%, 100% { transform: translateY(0); } 40% { transform: translateY(-30px); } 60% { transform: translateY(-15px); } }