adjust secondary bg

Author: silverwind

web_src/less/_base.less

@@ -99,7 +99,8 @@
   --color-markdown-code-block: #00000008;
   --color-button: #ffffff;
   --color-code-bg: #ffffff;
-  --color-shadow: #00000024;
+  --color-markdown-code-block: #00000010;
+  --color-secondary-bg: #f4f4f4;
 }
 
 :root:lang(ja) {
@@ -1691,6 +1692,11 @@ a.ui.basic.label:hover {
   border-color: var(--color-secondary);
 }
 
+.ui.secondary.segment {
+  background: var(--color-secondary-bg);
+  color: var(--color-text-light);
+}
+
 .ui.attached.header {
   position: relative;
   background: var(--color-box-header);

web_src/less/themes/theme-arc-green.less

@@ -95,6 +95,7 @@
   --color-button: #353846;
   --color-code-bg: #2a2e3a;
   --color-shadow: #00000060;
+  --color-secondary-bg: #313442;
 }
 
 /* LineTableTD */
@@ -827,11 +828,6 @@ td.blob-hunk {
   color: #dbdbdb;
 }
 
-.ui.secondary.segment {
-  background-color: rgba(0, 0, 0, .3);
-  color: #dbdbdb;
-}
-
 .ui.attached.info.message,
 .ui.info.message {
   box-shadow: 0 0 0 1px #4b5e71 inset, 0 0 0 0 transparent;