Side Note Paragraph

Live Demo

Hover over the element or use Tab to focus.

Source Code

Copy the HTML, CSS or JavaScript you need for your project.

<div class="tbx-1255"><div class="paper"><span class="kicker">EDITORIAL / 05</span><p>Design systems become more valuable when they are <button type="button" class="anchor" aria-label="Explanation of reusable design">reusable<span class="num">01</span><span class="note">Reusable components across multiple pages.</span></button> across pages.</p></div></div>

.tbx-1255{box-sizing:border-box;display:flex;align-items:center;justify-content:center;width:100%;max-width:100%;min-height:218px;overflow:visible;padding:24px 18px;font-family:system-ui,-apple-system,"Segoe UI",sans-serif;color:#243e43}
.tbx-1255 *,.tbx-1255 *::before,.tbx-1255 *::after{box-sizing:border-box}
.tbx-1255{background:#f1eee7;color:#252f34}
.tbx-1255 .paper{width:min(305px,100%);position:relative;border-left:2px solid #c4b6a2;padding:15px 12px 14px 19px;background:#fffdfa}
.tbx-1255 .kicker{font-size:9px;letter-spacing:.18em;color:#aa8460}
.tbx-1255 .paper p{font-size:18px;line-height:1.6;letter-spacing:-.02em;margin:12px 0 2px}
.tbx-1255 .anchor{font:inherit;font-weight:750;display:inline;padding:0 1px;background:transparent;color:#264a56;border:0;border-bottom:2px dotted #bd6b54;cursor:help;position:relative}
.tbx-1255 .num{position:absolute;top:-8px;right:-13px;font-size:8px;color:#bd6b54}
.tbx-1255 .note{position:absolute;left:auto;right:-8px;bottom:calc(100% + 12px);width:185px;padding:10px 13px;text-align:left;font:11px/1.5 system-ui,sans-serif;letter-spacing:0;background:#203e49;color:#fff;transform:translateY(8px);opacity:0;visibility:hidden;transition:opacity .24s,transform .24s,visibility .24s;box-shadow:0 7px 15px #14272d25;pointer-events:none;z-index:2}
.tbx-1255 .anchor:is(:hover,:focus-visible) .note{opacity:1;visibility:visible;transform:translateY(0)}
@media (prefers-reduced-motion: reduce) {.tbx-1255 *, .tbx-1255 *::before, .tbx-1255 *::after { transition-duration:0.01ms !important; animation-duration:0.01ms !important; scroll-behavior:auto !important; } }

How to Use

Insert the HTML and add the CSS to your stylesheet. Adjust colors and sizes and avoid class conflicts.

Use Case

Useful for articles and editorial layouts.

Technical Notes

Keep controls usable on touch devices. Test keyboard focus and reduced-motion preferences.

Mobile：Ensure the interactive content remains accessible without hover on touch devices.

Browser：Uses modern CSS. Check behavior in the browsers you support.

Reduced Motion：Check that prefers-reduced-motion is respected.