Add theme variants

- Use CSS variables instead of inherence
- Rename default theme to "Light - Serif"
- Rename Black theme to "Dark - Serif"
- Rename "Sans-Serif" theme to "Light - Sans Serif"
- Add "System" theme that use system preferences: Dark or Light
- Add Serif and Sans-Serif variants for each color theme

2 files changed, 4 insertions, 4 deletions

diff --git a/http/request/context.go b/http/request/context.go
index 51ee46a..5befb06 100644
--- a/http/request/context.go
+++ b/http/request/context.go
@@ -64,7 +64,7 @@ func UserLanguage(r *http.Request) string {
 func UserTheme(r *http.Request) string {
 	theme := getContextStringValue(r, UserThemeContextKey)
 	if theme == "" {
-		theme = "default"
+		theme = "light_serif"
 	}
 	return theme
 }
diff --git a/http/request/context_test.go b/http/request/context_test.go
index e741362..e7d6560 100644
--- a/http/request/context_test.go
+++ b/http/request/context_test.go
@@ -241,18 +241,18 @@ func TestUserTheme(t *testing.T) {
 	r, _ := http.NewRequest("GET", "http://example.org", nil)
 
 	result := UserTheme(r)
-	expected := "default"
+	expected := "light_serif"
 
 	if result != expected {
 		t.Errorf(`Unexpected context value, got %q instead of %q`, result, expected)
 	}
 
 	ctx := r.Context()
-	ctx = context.WithValue(ctx, UserThemeContextKey, "black")
+	ctx = context.WithValue(ctx, UserThemeContextKey, "dark_serif")
 	r = r.WithContext(ctx)
 
 	result = UserTheme(r)
-	expected = "black"
+	expected = "dark_serif"
 
 	if result != expected {
 		t.Errorf(`Unexpected context value, got %q instead of %q`, result, expected)