luci-theme-material: add back removed color variables

Partially reverts 2bdabf14c3 by adding back the deleted color variables as the custom.css was used by users to override the theme with their own colors. To maintain backwards compatibility with users we should not remove/rename these as it will result in colors being applied incorrectly.

Signed-off-by: Daniel Nilsson <daniel.nilsson94@outlook.com>

themes/luci-theme-material/htdocs/luci-static/material/cascade.css

@@ -212,7 +212,7 @@ select,
 select:not([multiple="multiple"]):focus,
 input:not(.cbi-button):focus,
 .cbi-dropdown:focus {
-	border-color: var(--primary-color);
+	border-color: var(--main-color);
 }
 
 .cbi-dropdown,
@@ -346,7 +346,7 @@ small {
 	overflow-x: auto;
 	width: calc(0% + 15rem);
 	height: calc(100% - 4rem);
-	background-color: var(--white-color);
+	background-color: var(--menu-bg-color);
 	transition: visibility 400ms, width 400ms;
 }
 
@@ -379,8 +379,8 @@ small {
 }
 
 header {
-	color: var(--secondary-color);
+	color: var(--header-color);
-	background: var(--primary-color);
+	background: var(--header-bg);
 }
 
 header > .fill > .container {
@@ -407,7 +407,7 @@ header > .fill > .container > .brand {
 	cursor: default;
 	vertical-align: text-bottom;
 	text-decoration: none;
-	color: var(--white-color);
+	color: var(--header-color);
 }
 
 header > .fill > .container > .status {
@@ -429,8 +429,8 @@ header > .fill > .container > .status > * {
 	display: flex;
 	flex-wrap: wrap;
 	align-items: center;
-	color: var(--white-color);
+	color: var(--header-color);
-	background: var(--secondary-color);
+	background: var(--header-bg);
 	padding: .5rem;
 	transition: box-shadow .2s;
 	box-shadow: 0 2px 5px rgb(0 0 0 / 26%);
@@ -463,9 +463,9 @@ header > .fill > .container > .status > * {
 #modemenu > li.divider {
 	margin-left: .25rem;
 	margin-right: .25rem;
-	border: .5rem solid var(--gray-color);
+	border: .5rem solid var(--submenu-bg-hover);
-	border-left: 1px solid var(--gray-color);
+	border-left: 1px solid var(--submenu-bg-hover);
-	border-right: 1px solid var(--gray-color);
+	border-right: 1px solid var(--submenu-bg-hover);
 	border-radius: 1rem;
 }
 
@@ -561,7 +561,7 @@ header > .fill > .container > .status > * {
 
 .main > .main-left > .nav > li a {
 	display: block;
-	color: #5f6368;
+	color: var(--menu-color);
 }
 
 .main > .main-left > .nav > li.active > a {
@@ -569,7 +569,7 @@ header > .fill > .container > .status > * {
 }
 
 .main > .main-left > .nav > li.active {
-	background-color: var(--primary-color);
+	background-color: var(--submenu-bg-hover-active);
 }
 
 .main > .main-left > .nav > li.slide.active {
@@ -597,7 +597,7 @@ header > .fill > .container > .status > * {
 	width: 100%;
 	padding: .5rem 1rem;
 	text-decoration: none;
-	color: var(--black-color-low);
+	color: var(--main-menu-color);
 }
 
 .main > .main-left > .nav > .slide > .menu::before {
@@ -635,7 +635,7 @@ body[class*="node-"] > .main > .main-left > .nav > .slide > .menu.active::before
 
 .main > .main-left > .nav > li:hover,
 .main > .main-left > .nav > .slide > .menu:hover {
-	background: var(--gray-color);
+	background: var(--submenu-bg-hover);
 }
 
 .main > .main-left > .nav > .slide:hover {
@@ -643,7 +643,7 @@ body[class*="node-"] > .main > .main-left > .nav > .slide > .menu.active::before
 }
 
 .main > .main-left > .nav > .slide > .slide-menu > .active {
-	background-color: var(--primary-color);
+	background-color: var(--submenu-bg-hover-active);
 }
 
 .main > .main-left > .nav > .slide > .slide-menu > li > a {
@@ -657,15 +657,15 @@ body[class*="node-"] > .main > .main-left > .nav > .slide > .menu.active::before
 }
 
 .main > .main-left > .nav > .slide > .slide-menu > li:hover {
-	background: var(--gray-color);
+	background: var(--submenu-bg-hover);
 }
 
 .main > .main-left > .nav > .slide > .slide-menu > li:not(.active):hover > a {
-	color: #5f6368;
+	color: var(--menu-color-hover);
 }
 
 .main > .main-left > .nav > .slide > .slide-menu > .active:hover {
-	background-color: var(--primary-color);
+	background-color: var(--main-color);
 }
 
 /* ripple effect */
@@ -1156,7 +1156,7 @@ td > table > tbody > tr > td,
 
 .tabs > li[class~="active"],
 .tabs > li:hover {
-	border-bottom-color: var(--primary-color);
+	border-bottom-color: var(--main-color);
 }
 
 .tabs > li:hover {
@@ -1172,7 +1172,7 @@ td > table > tbody > tr > td,
 }
 
 .tabs > li[class~="active"] > a {
-	color: var(--primary-color);
+	color: var(--main-color);
 }
 
 .cbi-tabmenu {
@@ -1561,7 +1561,7 @@ body:not(.Interfaces) .cbi-rowstyle-2:first-child {
 	border: thin solid #918e8c;
 	background: #f6f6f6;
 	box-shadow: 0 0 4px #918e8c;
-	color: var(--black-color-low);
+	color: var(--main-menu-color);
 }
 
 .cbi-dropdown > ul > li[display],
@@ -1643,7 +1643,7 @@ body:not(.Interfaces) .cbi-rowstyle-2:first-child {
 	width: 0;
 	height: 100%;
 	transition: width .25s ease-in;
-	background: var(--light-blue-color);
+	background: var(--bar-bg);
 }
 
 .cbi-progressbar::after {
@@ -2016,7 +2016,7 @@ td > .ifacebadge,
 }
 
 .ifacebox-head.active {
-	background: var(--light-blue-color);
+	background: var(--bar-bg);
 }
 
 .ifacebox-body {

themes/luci-theme-material/htdocs/luci-static/material/custom.css

@@ -1,3 +1,10 @@
+/**
+	The CSS variables in this file should be treated as a public API. The
+	colors have been put in a separate file to allow end users to
+	override the color variables with their own values by creating their
+	own custom.css file, which mean we can't delete/rename defined
+	variables which is already used in cascade.css.
+*/
 :root {
 	/** General colors */
 	--white-color: #ffffff;
@@ -22,9 +29,19 @@
 	--light-blue-color-high: #46b8da;
 	--on-light-blue-color: var(--white-color);
 	
-	--primary-color: #00B5E2;
+	--main-color: #00B5E2;
 	--secondary-color: #0099cc;
 
+	--header-bg: #00B5E2;
+	--header-color: #fff;
+	--bar-bg: #5bc0de;
+	--menu-bg-color: #fff;
+	--menu-color: #5f6368;
+	--menu-color-hover: #202124;
+	--main-menu-color: #202124;
+	--submenu-bg-hover: #d4d4d4;
+	--submenu-bg-hover-active: #00B5E2;
+
 	--notice-color: #002B49;
 	--on-notice-color: var(--white-color);