fix colors for login form of some themes

src/client/styles/scss/theme/antarctic.scss

@@ -123,9 +123,16 @@ html[dark] {
     }
   }
 
-  a#login.link-switch,
-  a#register.link-switch {
-    color: rgba(black, 0.5);
+  // login and register
+  .nologin {
+    a#login.link-switch,
+    a#register.link-switch {
+      color: rgba(black, 0.5);
+    }
+
+    .grw-external-auth-form {
+      border-color: #aaa !important;
+    }
   }
 }
 

src/client/styles/scss/theme/christmas.scss

@@ -135,22 +135,26 @@ html[dark] {
   // login page
   .nologin {
     .input-group {
-      .input-group-addon {
-        background-color: rgba(lighten(black, 10%), 0.6);
+      .input-group-text {
+        color: #444;
+        background-color: rgba(darken(white, 20%), 0.6);
       }
       .form-control {
-        background-color: rgba(lighten(black, 10%), 0.6);
+        color: #444;
+        background-color: rgba(white, 0.6);
       }
     }
 
-    &.login-page {
-      .login-header,
-      .login-dialog {
-        background-color: rgba(#ccc, 0.5);
-      }
-      .link-switch {
-        color: #bd3425;
-      }
+    .login-header,
+    .login-dialog {
+      background-color: rgba(#ccc, 0.5);
+    }
+    .link-switch {
+      color: #bd3425;
+    }
+
+    .grw-external-auth-form {
+      border-color: #aaa !important;
     }
   }
 

src/client/styles/scss/theme/spring.scss

@@ -104,7 +104,8 @@ html[dark] {
     }
   }
 
-  .growi.login-page {
+  // login and register
+  .nologin {
     #page-wrapper {
       background-color: $themelight;
       background-image: url('/images/themes/spring/spring.svg');
@@ -112,11 +113,19 @@ html[dark] {
       background-position: bottom;
       background-size: cover;
     }
-  }
 
-  a#login.link-switch,
-  a#register.link-switch {
-    color: $color-global;
+    .login-header,
+    .login-dialog {
+      background-color: rgba(black, 0.1);
+    }
+
+    .link-switch {
+      color: $color-global;
+    }
+
+    .grw-external-auth-form {
+      border-color: $accentcolor !important;
+    }
   }
 
   .table {

src/client/styles/scss/theme/wood.scss

@@ -144,14 +144,20 @@ html[dark] {
   }
 
   // login and register
+  .nologin {
+    background: white;
 
-  .login-header,
-  .login-dialog {
-    background-color: rgba(black, 0.1);
-  }
+    .login-header,
+    .login-dialog {
+      background-color: rgba(black, 0.1);
+    }
 
-  a#login.link-switch,
-  a#register.link-switch {
-    color: rgba(black, 0.5);
+    .link-switch {
+      color: rgba(black, 0.5);
+    }
+
+    .grw-external-auth-form {
+      border-color: #aaa !important;
+    }
   }
 }