Minor improvement: Applied Visual Design

Target: “Applied Visual Design: Make a CSS Heartbeat using an Infinite Animation Count”

The animation at "@keyframes beat " can become much smoother by simply switching:

transform: scale(0.6) rotate(-45deg);
transform: scale(0.7) rotate(-45deg);

At default scale size, a small lag is noticeable when animation reaches 50%, at least in my computer.

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Found the cause (very dull): scroll bar compensation. As it kept poping in and out, margin was being constantly repositioned – and that was resulting in the visual “lag”.

Having a bigger transparent and static container (or white and lower z-index) would solve it.

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