A responsive header with a grid layout using template '1fr 2fr', containing items with medium text and :hover { background-color: #555; color: white; }.
<header style='display: grid; grid-template-columns: repeat(2, 1fr); gap: 10px; :hover { transform: scale(1.1); }'><li style='color: cyan; border: 1px dashed blue;'>Choose Option</li><li style='color: pink; border: 1px dotted black;'>Hello World</li><li style='color: pink; border: 1px solid white;'>Submit</li><li style='color: purple; border: 1px dotted cyan;'>Hello World</li><li style='color: black; border: 1px double purple;'>Choose Option</li></header> @keyframes fade-in { from { opacity: 0; } to { opacity: 1; } }