docs/_static/css/banner.css

/* Full-width notice above the topbar (see _templates/banner.html).
   Archived releases inject the same markup from build_versions.py. */

.site-banner {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    padding: 9px 44px 9px 14px;
    position: relative;
    background: #fff8e1;
    border-bottom: 1px solid #f0d98c;
    color: #6b5618;
    font-size: 0.88rem;
    line-height: 1.45;
    text-align: center;
}

html.site-banner-dismissed .site-banner {
    display: none;
}

/* Archived releases are built from an old tag and have no
   .header-stack; there the banner pins itself. */
body > .site-banner {
    position: sticky;
    top: 0;
    z-index: 1000;
}

/* Sensible offset before (or without) js/banner.js, which replaces it
   with the measured height. */
html:has(.site-banner) {
    --header-height: calc(var(--topbar-height) + 40px);
}

html.site-banner-dismissed {
    --header-height: var(--topbar-height);
}

.site-banner-close::before {
    content: "\00d7";
    font-size: 19px;
    line-height: 1;
}

.site-banner-close {
    position: absolute;
    right: 10px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 26px;
    height: 26px;
    padding: 0;
    border: 0;
    border-radius: 50%;
    background: transparent;
    color: inherit;
    opacity: 0.7;
    cursor: pointer;
}

.site-banner-close:hover {
    background: rgba(0, 0, 0, 0.07);
    opacity: 1;
}

.site-banner-close:focus-visible {
    outline: 2px solid currentColor;
    outline-offset: 1px;
}

[data-theme="dark"] .site-banner-close:hover {
    background: rgba(255, 255, 255, 0.12);
}

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

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

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

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

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