Design glassmorphism cards visually. Adjust blur, transparency, border opacity and background color — then copy the complete CSS for any frosted-glass UI element.
Glassmorphism is a UI style built on three CSS properties: backdrop-filter: blur() to blur whatever is behind the element, a semi-transparent background-color using rgba or hsla, and a subtle border with low-opacity white to suggest a glass edge. The effect only works when there is visible content behind the element — a solid background makes it invisible. backdrop-filter is GPU-accelerated in all modern browsers and is safe to use in production. Increasing blur radius increases GPU load, so keep values under 30px for elements that cover large areas or appear on mobile.