HOW TO MAKE BACKGROUND THINGS RESPONSIVE USE THIS CSS IN YOUR WEBPAGE Formal syntax: < bg-size > # /* Keywords syntax */ background-size: cover background-size: contain /* One-value syntax: the value defines the width of the image, the height is implicitly set to 'auto' */ background-size: 50% background-size: 3em background-size: 12px background-size: auto /* Two-value syntax: the first value defines the width of the image, the second its height */ background-size: 50% auto background-size: 3em 25% background-size: auto 6px background-size: auto auto /* Values for the multiple backgrounds, defined by background-image, may be listed separated by commas */ background-size: auto, auto /* Do not confuse this with background-size: auto auto */ background-size: 50%, 25%, 25% background-size: 6px, auto, contain background-size: inherit