CSS — Looking Good No Matter The Device

img {
max-width: 100%;
height: auto;
}
<style>
img { height: 300px; width: 300px; }
</style>
<img src="600x600image" alt="High res picture">

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Get the Medium app

A button that says 'Download on the App Store', and if clicked it will lead you to the iOS App store
A button that says 'Get it on, Google Play', and if clicked it will lead you to the Google Play store