feat: update sidebar background color for light mode

src/css/custom.css

@@ -43,6 +43,8 @@
   --bt-heading-font-style: normal;
   --bt-heading-letter-spacing: -1px;
   --bt-code-font-family: "Source Code Pro";
+  --bt-sidebar-background-color: #f3f5fd;
+  --bt-sidebar-border-color: rgba(209, 215, 255, 0.4);
 }
 
 /* For readability concerns you should choose a lighter palette in dark mode. */
@@ -56,9 +58,8 @@
   --ifm-color-primary-lightest: #00d5f2;
   --docusaurus-highlighted-code-line-bg: rgba(0 0 0 0.3);
 
-  --ifm-font-color-base: white;
-
-  --ifm-heading-color: white;
+  --ifm-font-color-base: #fff;
+  --ifm-heading-color: #fff;
 }
 
 h1 {
@@ -100,3 +101,8 @@ h6 {
 code {
   font-family: var(--bt-code-font-family);
 }
+
+[data-theme="light"] .theme-doc-sidebar-container {
+  background-color: var(--bt-sidebar-background-color);
+  border: 1px solid var(--bt-sidebar-border-color);
+}