MediaWiki:Common.css

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/* GoodToKnow logo header: blue lines above and below */
.mw-page-container {
    position: relative;
}

.mw-page-container .mw-page-container-inner > .mw-header-container {
    border-top: 24px solid #1E90FF;
    border-bottom: 24px solid #1E90FF;
}

/* Vector 2022 header fallback */
.mw-header {
    border-top: 24px solid #1E90FF;
    border-bottom: 24px solid #1E90FF;
}