Update common.css

define values for undefined variables (probably unused)

resources/css/common.css

@@ -102,6 +102,8 @@ html[data-theme='dark'] {
   --ls-error-background-color: var(--color-red-900);
   --ls-warning-text-color: var(--color-yellow-100);
   --ls-warning-background-color: var(--color-yellow-900);
+  --ls-success-text-color: var(--color-green-100);
+  --ls-success-background-color: var(--color-green-900);
   --ls-focus-ring-color: rgba(18, 98, 119, 0.5);
   --ls-header-button-background: #dee4ea;
   --color-level-1: var(--ls-secondary-background-color);
@@ -177,6 +179,8 @@ html[data-theme='light'] {
   --ls-error-background-color: var(--color-red-100);
   --ls-warning-text-color: var(--color-yellow-800);
   --ls-warning-background-color: var(--color-yellow-100);
+  --ls-success-text-color: var(--color-green-800);
+  --ls-success-background-color: var(--color-green-100);
   --ls-focus-ring-color: rgba(66, 133, 244, 0.5);
   --ls-header-button-background: rgba(15, 20, 25, 1);
   --color-level-1: var(--ls-secondary-background-color);