the-glorious-startpage/css/theme-engine.css

.themeEngine {
	font-family: roboto, sans-serif;
	font-weight: 400;
	width: 100%;
	height: auto;
	position: relative;;
	border-radius: 6px;
	color: var(--base-color);
	background: var(--base-container);
	margin-top: 10px;
}

#themeEnginePadding {
	padding: 10px;
	height: auto;
}

#themeEngineHeader {
	height: 32px;
	width: 100%;

	display: flex;
	flex-direction: row;
	justify-content: left;
}

#themeEngineHeaderIcon {
	background: url('../assets/ui-icons/theme.svg');
	background-size: cover;
	margin-right: 10px;
	width: 28px;
	height: 28px;
}

#themeEngineHeaderLabel {
	font-family: roboto-bold, sans-serif;
	font-weight: bold;
	font-size: 14pt;
	text-align: left;
	margin-top: auto;
	margin-bottom: auto;
}

#themeEngineContainer {
	margin-top: 5px;
}

#themeEngineSelect {
	width: 100%;
	height: 32px;
	background: var(--base-container);
	color: var(--base-color);
	font-weight: normal;
	font-style: 14pt;
	border: none;
	border-radius: 6px;
	padding: 5px;

	-webkit-appearance: none;
	-moz-appearance: none;
	appearance: none;
}

#themeEngineSelect:hover {
	cursor: pointer;
}

#themeEngineSelect option {
	color: initial;
	border: none;
}

select::-ms-expand {
  display: none;
}

#themeEngineReset,
#themeEngineAsDefault {
	background: var(--base-container);
	color: var(--base-color);
	text-align: center;
	font-family: roboto, sans-serif;
	font-size: 12pt;
	font-weight: 400;

	width: 100%;
	height: 32px;
	margin-top: 5px;
	border-radius: 6px;
	cursor: pointer;
	border: none;

	/*Center vertically*/
	display: flex;
  	justify-content: center;
  	align-items: center;
}

#themeEngineReset:hover,
#themeEngineAsDefault:hover {
	background: var(--base-hover-bg);
}

#themeEngineReset:active,
#themeEngineAsDefault:active {
	background: var(--base-active-bg);
}

#themeEngineReset:focus,
#themeEngineAsDefault:focus {
	outline: none;
	background: var(--base-focus-bg);
}

.themeEngineGroups {
	margin-top: 5px;
}

.themeEngineLabels {
	font-family: roboto, sans-serif;
	color: var(--base-color);
	font-size: 11pt;
	font-weight: 400;
}

.backgroundColorSetter,
.foregroundColorSetter,
.blurSetter,
.animSpeedSetter {
	/*Align div inside horizontally*/
	display: flex;
	flex-direction: row;
	justify-content: left;

	margin-top: 5px;
	box-sizing: border-box;
}

#backgroundSet,
#foregroundSet,
#backgroundOpacitySet,
#foregroundOpacitySet {
	margin-right: 2.5px;
	height: 32px;
	width: 100%;
	box-sizing: border-box;

	border: none;
	text-align: center;
	border-radius: 6px;
	
	font-family: roboto, sans-serif;
	font-size: 12pt;
	font-weight: 400;
	color: var(--base-color);
	background: var(--panel-bg);
}

#backgroundOpacitySet,
#foregroundOpacitySet {
	margin-left: 2.5px;
	margin-right: 0;
	width: 25%;
}

#blurSet,
#animSpeedSet {
	height: 32px;
	width: 100%;
	box-sizing: border-box;
	border: none;
	text-align: center;
	border-radius: 6px;
	color: var(--base-color);
	background: var(--panel-bg);
}

@media screen and (max-width: 580px) {
	.themeEngine {
		width: 96vw;
		box-sizing: border-box;
	}
}