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diff --git a/www/wiki/resources/src/mediawiki.less/mediawiki.ui/mixins.less b/www/wiki/resources/src/mediawiki.less/mediawiki.ui/mixins.less
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+// ----------------------------------------------------------------------------
+// Form styling mixins
+// ----------------------------------------------------------------------------
+.agora-label-styling() {
+	font-size: 0.9em;
+	color: @colorText;
+
+	* {
+		font-weight: normal;
+	}
+}
+
+.agora-inline-label-styling() {
+	margin-bottom: 0.5em;
+	cursor: pointer;
+	vertical-align: bottom;
+	line-height: normal;
+	font-weight: normal;
+
+	& > input[ type='checkbox' ],
+	& > input[ type='radio' ] {
+		width: auto;
+		height: auto;
+		margin: 0 0.1em 0 0;
+		padding: 0;
+		border: 1px solid @colorGray7;
+		cursor: pointer;
+	}
+}
+
+// ----------------------------------------------------------------------------
+// Button styling
+// ----------------------------------------------------------------------------
+
+.button-colors( @bgColor, @highlightColor, @activeColor ) {
+	background-color: @bgColor;
+	color: @colorButtonText;
+	border: 1px solid @colorFieldBorder;
+
+	// Make sure that `color` isn't inheriting from user-agent styles
+	&:visited {
+		color: @colorButtonText;
+	}
+
+	&:hover {
+		background-color: @highlightColor;
+		color: @colorGray4;
+		border-color: @colorGray10;
+	}
+
+	&:focus {
+		background-color: @highlightColor;
+		// Make sure that `color` isn't inheriting from user-agent styles
+		color: @colorButtonText;
+		border-color: @colorProgressive;
+		box-shadow: inset 0 0 0 1px @colorProgressive, inset 0 0 0 2px #fff;
+	}
+
+	&:active,
+	&.is-on,
+	&.mw-ui-checked {
+		background-color: @activeColor;
+		color: @colorGray1;
+		border-color: @colorGray7;
+		box-shadow: none;
+	}
+
+	&:disabled {
+		background-color: @colorGray12;
+		color: #fff;
+		border-color: @colorGray12;
+
+		// Make sure disabled buttons don't have hover and active states
+		&:hover,
+		&:active {
+			background-color: @colorGray12;
+			color: #fff;
+			box-shadow: none;
+			border-color: @colorGray12;
+		}
+	}
+}
+
+.button-colors-primary( @bgColor, @highlightColor, @activeColor ) {
+	background-color: @bgColor;
+	color: #fff;
+	// border of the same color as background so that light background and
+	// dark background buttons are the same height and width
+	border: 1px solid @bgColor;
+
+	&:hover {
+		background-color: @highlightColor;
+		border-color: @highlightColor;
+	}
+
+	&:focus {
+		box-shadow: inset 0 0 0 1px @bgColor, inset 0 0 0 2px #fff;
+	}
+
+	&:active,
+	&.is-on,
+	&.mw-ui-checked {
+		background-color: @activeColor;
+		border-color: @activeColor;
+		box-shadow: none;
+	}
+
+	&:disabled {
+		background-color: @colorGray12;
+		color: #fff;
+		border-color: @colorGray12;
+
+		// Make sure disabled buttons don't have hover and active states
+		&:hover,
+		&:active,
+		&.mw-ui-checked {
+			background-color: @colorGray12;
+			color: #fff;
+			border-color: @colorGray12;
+			box-shadow: none;
+		}
+	}
+}
+
+.button-colors-quiet( @textColor, @highlightColor, @activeColor ) {
+	// Quiet buttons all start gray, and reveal
+	// progressive/destructive color on hover and active.
+	color: @colorButtonText;
+
+	&:hover {
+		background-color: transparent;
+		color: @highlightColor;
+	}
+
+	&:active,
+	&.mw-ui-checked {
+		color: @activeColor;
+	}
+
+	&:focus {
+		background-color: transparent;
+		color: @textColor;
+	}
+
+	&:disabled {
+		color: @colorDisabledText;
+	}
+}