MediaWiki:Common.css

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/* CSS placed here will be applied to all skins */
/* Vector 2022: hide the wordmark (site title) and tagline next to the logo */
.mw-logo-wordmark,
.mw-logo-tagline,
.mw-wiki-title,
.mw-logo-text {
  display: none !important;
}
/* --- BIG LOGO: Vector 2022 --- */

/* 1) Set how tall you want the header area */
.vector-header {
  min-height: 160px !important; /* adjust */
}

/* 2) Let the logo block use that height */
.vector-header-start,
.mw-logo {
  height: 160px !important;     /* match the header height */
  display: flex !important;
  align-items: center !important;
}

/* 3) Kill Vector's built-in logo caps */
.mw-logo-icon,
.mw-logo-icon img,
.mw-logo img {
  max-height: none !important;
  height: 180px !important;     /* THIS is what makes it bigger */
  width: auto !important;
}