liquid layout

Liquid layout is a method of CSS layout that defines all widths in percentages, so the areas of the page will grow/shrink when the viewport (browser window) is resized. It expands to fill the entire available area as the browser window is resized.

They’re very useful if trying to create a site that will fit both large and small screens. They’re a little more difficult to work with than fixed layouts, because you’re relinquishing some level control over how everything fits in the page, and you have to pay very close attention to your content, to make sure it doesn’t fall apart aesthetically on resize.