The Damped Harmonic Oscillator

A hello-world note: prose, math, and one interactive island.

This is a plain note. Everything you’re reading is ordinary Markdown.

When you want math, write it inline like $E = mc^2$, or as a block:

Now an interactive widget that breaks out wider than the text and sits centered in its box. Drag the slider.

The text snaps back to readable width. You never computed a margin — the grid holds the center; the widget just declared class="wide".