Chapter Label Rail

Live Demo

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Source Code

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

<div class="tbx-1237"><nav class="rail" aria-label="Chapter navigation"><a href="#tb1237-one"><span>01</span><b>Overview</b></a><a href="#tb1237-two"><span>02</span><b>Approach</b></a><a href="#tb1237-three"><span>03</span><b>Examples</b></a></nav></div>

.tbx-1237{box-sizing:border-box;display:flex;align-items:center;justify-content:center;min-height:212px;width:100%;max-width:100%;padding:19px;overflow:hidden;font-family:system-ui,-apple-system,sans-serif;color:#18314a;}
.tbx-1237 * ,.tbx-1237 *::before,.tbx-1237 *::after{box-sizing:border-box}

.tbx-1237{background:#e7e8ef}.tbx-1237 .rail{display:flex;flex-direction:column;gap:5px;width:min(100%,250px);background:#fff;padding:12px;border-left:4px solid #677b9e;box-shadow:0 7px 17px #2d3d4e16}.tbx-1237 .rail a{height:41px;display:flex;align-items:center;gap:14px;color:#4d5a6a;text-decoration:none;border-radius:5px;padding:7px 12px;transition:background .3s,padding .3s}.tbx-1237 .rail a span{font:800 13px Georgia;color:#7886a3;letter-spacing:.04em}.tbx-1237 .rail a b{font-size:13px;letter-spacing:.02em;max-width:0;overflow:hidden;white-space:nowrap;opacity:0;transform:translateX(-9px);transition:all .32s}.tbx-1237 .rail a:is(:hover,:focus-visible){background:#314d76;padding-left:18px;color:white}.tbx-1237 .rail a:is(:hover,:focus-visible) span{color:#e7c490}.tbx-1237 .rail a:is(:hover,:focus-visible) b{max-width:140px;opacity:1;transform:translateX(0)}.tbx-1237 .rail a:focus-visible{outline:3px solid #c1844a;outline-offset:1px}

@media(prefers-reduced-motion:reduce){.tbx-1237 *, .tbx-1237 *::before,.tbx-1237 *::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 navigation menus and articles.

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.