docs/_static/css/dev-banner.css

/* TEMPORARY: development-version notice.

   Remove before the release, together with
   _templates/dev-banner.html and its include in layout.html. */

/* Top of the content column, not spanning the sidebar. The negative
   margins cancel .main's horizontal padding so the bar reaches both
   edges of the column. */
.dev-banner {
    margin: 0 -24px;
    padding: 9px 14px;
    background: #fff8e1;
    border-bottom: 1px solid #f0d98c;
    color: #6b5618;
    font-size: 0.88rem;
    line-height: 1.45;
    text-align: center;
}

@media (max-width: 1024px) {
    .dev-banner {
        margin: 0 -16px;
    }
}

@media (max-width: 600px) {
    .dev-banner {
        margin: 0 -12px;
    }
}

/* Paired with :visited so the theme's visited-link rule can't leak
   through and recolor it mid-sentence. */
.dev-banner a,
.dev-banner a:visited {
    color: #8a6d1f;
    font-weight: 600;
    text-decoration: underline;
    text-underline-offset: 2px;
}

.dev-banner a:hover {
    color: #5c470f;
}

[data-theme="dark"] .dev-banner {
    background: #2b2415;
    border-bottom-color: #4a3c1d;
    color: #ddcb98;
}

[data-theme="dark"] .dev-banner a,
[data-theme="dark"] .dev-banner a:visited {
    color: #f0d98c;
}

[data-theme="dark"] .dev-banner a:hover {
    color: #fbecc0;
}