Шаблон:FlatCardWithHeader/Сollapsible/styles.css

.flat-card-with-header--сollapsible {
    position: relative;
	--bg-color--hsl:  hsl(var(--theme-bg--hsl), 50%, 0.05);
	background: var(--bg-color--hsl);
	box-shadow: var(--box-shadow);
	border-radius: var(--border-radius-high);
  
    display: grid;
}

.flat-card-with-header--сollapsible__header {
    display: flex;
    align-items: center;
    font-family: "noto sans";
    text-align: left;
    padding: 3px;
	border: 1px solid var(--color-lighter-alpha-x);
	border-bottom: 3px solid var(--color-darkened-border);
    min-height: 36px;
    border-radius: var(--border-radius-high);
    overflow-wrap: anywhere;
	background: var(--bg-color); /* --bg-color из стилей шаблона; по умолчанию: var(--theme-bg-color-200) */
    
    grid-row: 1;
    grid-column: 1 / 3;
}

.flat-card-with-header--сollapsible__header-img {
	background: rgba(0, 0, 0, var(--alpha-xs));
	padding: 2px;
	border-radius: var(--border-radius-low);
}

.flat-card-with-header--сollapsible__content {
    grid-column: 1 / 3;
    grid-row: 2;
}

.flat-card-with-header--сollapsible > .mw-collapsible-toggle {
    position: relative;
    display: flex;
    align-items: center;
    justify-content: flex-end;
    padding: 7px;
    
    top: 0;
    right: 0;
    
    grid-row: 1;
    grid-column: 1 / 3;
}

.flat-card-with-header--сollapsible__header a {
    z-index: 2;
    position: relative;
}