Set default fonts via *_font_* instead of google_fonts

And add tests

DESCRIPTION

     utils,
     whisker
 Suggests: 
+    callr,
     ggplot2,
     here,
     knitr,
     showtext,
     sysfonts,
     testthat (>= 2.1.0),
-    xaringan,
-    vdiffr
+    xaringan
 VignetteBuilder: 
     knitr
 Encoding: UTF-8

R/style_duo.R

 #' @param header_background_content_padding_top Top Padding for Content in Slide with Header with Background. Defaults to 7rem. Modifies the `.remark-slide-content` class.
 #' @param header_background_ignore_classes Slide Classes Where Header with Background will not be Applied. Defaults to `c('normal', 'inverse', 'title', 'middle', 'bottom')`. Modifies the `.remark-slide-content` class.
 #' @param text_slide_number_font_size Slide Number Text Font Size. Defaults to 0.9rem. Modifies the `.remark-slide-number` class.
-#' @param text_font_google Use `google_font()` to specify body font. Defaults to `google_font("Noto Sans", "400", "400i", "700", "700i")`. Modifies the `body` element.
-#' @param text_font_family Body Text Font Family (xaringan default is `'Droid Serif'`). Defaults to `NULL`. Modifies the `body` element.
+#' @param text_font_google Use `google_font()` to specify body font. Defaults to `NULL`. Modifies the `body` element.
+#' @param text_font_family Body Text Font Family (xaringan default is `'Droid Serif'`). Defaults to Noto Sans. Modifies the `body` element.
 #' @param text_font_weight Body Text Font Weight. Defaults to normal. Modifies the `body` element.
-#' @param text_font_url Body Text Font URL(s). Defaults to `NULL`. Modifies the `@import url()` elements.
+#' @param text_font_url Body Text Font URL(s). Defaults to https://fonts.googleapis.com/css?family=Noto+Sans:400,400i,700,700i&display=swap. Modifies the `@import url()` elements.
 #' @param text_font_family_fallback Body Text Font Fallbacks. Defaults to 'Palatino Linotype', 'Book Antiqua', Palatino, 'Microsoft YaHei', 'Songti SC'. Modifies the `body` element.
 #' @param text_font_base Body Text Base Font (Total Failure Fallback). Defaults to serif. Modifies the `body` element.
-#' @param header_font_google Use `google_font()` to specify header font. Defaults to `google_font("Cabin", "600", "600i")`. Modifies the `body` element.
-#' @param header_font_family Header Font Family (xaringan default is `'Yanone Kaffeesatz'`). Defaults to `NULL`. Modifies the `h1, h2, h3` elements.
-#' @param header_font_weight Header Font Weight. Defaults to normal. Modifies the `h1, h2, h3` elements.
-#' @param header_font_url Header Font URL. Defaults to `NULL`. Modifies the `@import url` elements.
-#' @param code_font_google Use `google_font()` to specify code font. Defaults to `google_font("Source Code Pro", "400", "700")`. Modifies the `body` element.
-#' @param code_font_family Code Font Family. Defaults to `NULL`. Modifies the `.remark-code, .remark-inline-code` classes.
+#' @param header_font_google Use `google_font()` to specify header font. Defaults to `NULL`. Modifies the `body` element.
+#' @param header_font_family Header Font Family (xaringan default is `'Yanone Kaffeesatz'`). Defaults to Cabin. Modifies the `h1, h2, h3` elements.
+#' @param header_font_weight Header Font Weight. Defaults to 600. Modifies the `h1, h2, h3` elements.
+#' @param header_font_url Header Font URL. Defaults to https://fonts.googleapis.com/css?family=Cabin:600,600i&display=swap. Modifies the `@import url` elements.
+#' @param code_font_google Use `google_font()` to specify code font. Defaults to `NULL`. Modifies the `body` element.
+#' @param code_font_family Code Font Family. Defaults to Source Code Pro. Modifies the `.remark-code, .remark-inline-code` classes.
 #' @param code_font_size Code Text Font Size. Defaults to 0.9rem. Modifies the `.remark-inline` class.
-#' @param code_font_url Code Font URL. Defaults to `NULL`. Modifies the `@import url` elements.
+#' @param code_font_url Code Font URL. Defaults to https://fonts.googleapis.com/css?family=Source+Code+Pro:400,700&display=swap. Modifies the `@import url` elements.
 #' @param code_font_family_fallback Code Font Fallback. Defaults to 'Lucida Console', Monaco. Modifies the `.remark-code, .remark-inline-code` classes.
 #' @param colors A named vector of custom colors. The names of the colors
 #'   become CSS variables and classes that can be used within your slides.
   header_background_content_padding_top = "7rem",
   header_background_ignore_classes = c('normal', 'inverse', 'title', 'middle', 'bottom'),
   text_slide_number_font_size = "0.9rem",
-  text_font_google = google_font("Noto Sans", "400", "400i", "700", "700i"),
-  text_font_family = NULL,
+  text_font_google = NULL,
+  text_font_family = "Noto Sans",
   text_font_weight = "normal",
-  text_font_url = NULL,
+  text_font_url = "https://fonts.googleapis.com/css?family=Noto+Sans:400,400i,700,700i&display=swap",
   text_font_family_fallback = "'Palatino Linotype', 'Book Antiqua', Palatino, 'Microsoft YaHei', 'Songti SC'",
   text_font_base = "serif",
-  header_font_google = google_font("Cabin", "600", "600i"),
-  header_font_family = NULL,
-  header_font_weight = "normal",
-  header_font_url = NULL,
-  code_font_google = google_font("Source Code Pro", "400", "700"),
-  code_font_family = NULL,
+  header_font_google = NULL,
+  header_font_family = "Cabin",
+  header_font_weight = "600",
+  header_font_url = "https://fonts.googleapis.com/css?family=Cabin:600,600i&display=swap",
+  code_font_google = NULL,
+  code_font_family = "Source Code Pro",
   code_font_size = "0.9rem",
-  code_font_url = NULL,
+  code_font_url = "https://fonts.googleapis.com/css?family=Source+Code+Pro:400,700&display=swap",
   code_font_family_fallback = "'Lucida Console', Monaco",
   colors = NULL,
   extra_css = NULL,

R/style_duo_accent.R

 #' @param header_background_content_padding_top Top Padding for Content in Slide with Header with Background. Defaults to 7rem. Modifies the `.remark-slide-content` class.
 #' @param header_background_ignore_classes Slide Classes Where Header with Background will not be Applied. Defaults to `c('normal', 'inverse', 'title', 'middle', 'bottom')`. Modifies the `.remark-slide-content` class.
 #' @param text_slide_number_font_size Slide Number Text Font Size. Defaults to 0.9rem. Modifies the `.remark-slide-number` class.
-#' @param text_font_google Use `google_font()` to specify body font. Defaults to `google_font("Noto Sans", "400", "400i", "700", "700i")`. Modifies the `body` element.
-#' @param text_font_family Body Text Font Family (xaringan default is `'Droid Serif'`). Defaults to `NULL`. Modifies the `body` element.
+#' @param text_font_google Use `google_font()` to specify body font. Defaults to `NULL`. Modifies the `body` element.
+#' @param text_font_family Body Text Font Family (xaringan default is `'Droid Serif'`). Defaults to Noto Sans. Modifies the `body` element.
 #' @param text_font_weight Body Text Font Weight. Defaults to normal. Modifies the `body` element.
-#' @param text_font_url Body Text Font URL(s). Defaults to `NULL`. Modifies the `@import url()` elements.
+#' @param text_font_url Body Text Font URL(s). Defaults to https://fonts.googleapis.com/css?family=Noto+Sans:400,400i,700,700i&display=swap. Modifies the `@import url()` elements.
 #' @param text_font_family_fallback Body Text Font Fallbacks. Defaults to 'Palatino Linotype', 'Book Antiqua', Palatino, 'Microsoft YaHei', 'Songti SC'. Modifies the `body` element.
 #' @param text_font_base Body Text Base Font (Total Failure Fallback). Defaults to serif. Modifies the `body` element.
-#' @param header_font_google Use `google_font()` to specify header font. Defaults to `google_font("Cabin", "600", "600i")`. Modifies the `body` element.
-#' @param header_font_family Header Font Family (xaringan default is `'Yanone Kaffeesatz'`). Defaults to `NULL`. Modifies the `h1, h2, h3` elements.
-#' @param header_font_weight Header Font Weight. Defaults to normal. Modifies the `h1, h2, h3` elements.
-#' @param header_font_url Header Font URL. Defaults to `NULL`. Modifies the `@import url` elements.
-#' @param code_font_google Use `google_font()` to specify code font. Defaults to `google_font("Source Code Pro", "400", "700")`. Modifies the `body` element.
-#' @param code_font_family Code Font Family. Defaults to `NULL`. Modifies the `.remark-code, .remark-inline-code` classes.
+#' @param header_font_google Use `google_font()` to specify header font. Defaults to `NULL`. Modifies the `body` element.
+#' @param header_font_family Header Font Family (xaringan default is `'Yanone Kaffeesatz'`). Defaults to Cabin. Modifies the `h1, h2, h3` elements.
+#' @param header_font_weight Header Font Weight. Defaults to 600. Modifies the `h1, h2, h3` elements.
+#' @param header_font_url Header Font URL. Defaults to https://fonts.googleapis.com/css?family=Cabin:600,600i&display=swap. Modifies the `@import url` elements.
+#' @param code_font_google Use `google_font()` to specify code font. Defaults to `NULL`. Modifies the `body` element.
+#' @param code_font_family Code Font Family. Defaults to Source Code Pro. Modifies the `.remark-code, .remark-inline-code` classes.
 #' @param code_font_size Code Text Font Size. Defaults to 0.9rem. Modifies the `.remark-inline` class.
-#' @param code_font_url Code Font URL. Defaults to `NULL`. Modifies the `@import url` elements.
+#' @param code_font_url Code Font URL. Defaults to https://fonts.googleapis.com/css?family=Source+Code+Pro:400,700&display=swap. Modifies the `@import url` elements.
 #' @param code_font_family_fallback Code Font Fallback. Defaults to 'Lucida Console', Monaco. Modifies the `.remark-code, .remark-inline-code` classes.
 #' @param colors A named vector of custom colors. The names of the colors
 #'   become CSS variables and classes that can be used within your slides.
   header_background_content_padding_top = "7rem",
   header_background_ignore_classes = c('normal', 'inverse', 'title', 'middle', 'bottom'),
   text_slide_number_font_size = "0.9rem",
-  text_font_google = google_font("Noto Sans", "400", "400i", "700", "700i"),
-  text_font_family = NULL,
+  text_font_google = NULL,
+  text_font_family = "Noto Sans",
   text_font_weight = "normal",
-  text_font_url = NULL,
+  text_font_url = "https://fonts.googleapis.com/css?family=Noto+Sans:400,400i,700,700i&display=swap",
   text_font_family_fallback = "'Palatino Linotype', 'Book Antiqua', Palatino, 'Microsoft YaHei', 'Songti SC'",
   text_font_base = "serif",
-  header_font_google = google_font("Cabin", "600", "600i"),
-  header_font_family = NULL,
-  header_font_weight = "normal",
-  header_font_url = NULL,
-  code_font_google = google_font("Source Code Pro", "400", "700"),
-  code_font_family = NULL,
+  header_font_google = NULL,
+  header_font_family = "Cabin",
+  header_font_weight = "600",
+  header_font_url = "https://fonts.googleapis.com/css?family=Cabin:600,600i&display=swap",
+  code_font_google = NULL,
+  code_font_family = "Source Code Pro",
   code_font_size = "0.9rem",
-  code_font_url = NULL,
+  code_font_url = "https://fonts.googleapis.com/css?family=Source+Code+Pro:400,700&display=swap",
   code_font_family_fallback = "'Lucida Console', Monaco",
   colors = NULL,
   extra_css = NULL,

R/style_duo_accent_inverse.R

 #' @param header_background_content_padding_top Top Padding for Content in Slide with Header with Background. Defaults to 7rem. Modifies the `.remark-slide-content` class.
 #' @param header_background_ignore_classes Slide Classes Where Header with Background will not be Applied. Defaults to `c('normal', 'inverse', 'title', 'middle', 'bottom')`. Modifies the `.remark-slide-content` class.
 #' @param text_slide_number_font_size Slide Number Text Font Size. Defaults to 0.9rem. Modifies the `.remark-slide-number` class.
-#' @param text_font_google Use `google_font()` to specify body font. Defaults to `google_font("Noto Sans", "400", "400i", "700", "700i")`. Modifies the `body` element.
-#' @param text_font_family Body Text Font Family (xaringan default is `'Droid Serif'`). Defaults to `NULL`. Modifies the `body` element.
+#' @param text_font_google Use `google_font()` to specify body font. Defaults to `NULL`. Modifies the `body` element.
+#' @param text_font_family Body Text Font Family (xaringan default is `'Droid Serif'`). Defaults to Noto Sans. Modifies the `body` element.
 #' @param text_font_weight Body Text Font Weight. Defaults to normal. Modifies the `body` element.
-#' @param text_font_url Body Text Font URL(s). Defaults to `NULL`. Modifies the `@import url()` elements.
+#' @param text_font_url Body Text Font URL(s). Defaults to https://fonts.googleapis.com/css?family=Noto+Sans:400,400i,700,700i&display=swap. Modifies the `@import url()` elements.
 #' @param text_font_family_fallback Body Text Font Fallbacks. Defaults to 'Palatino Linotype', 'Book Antiqua', Palatino, 'Microsoft YaHei', 'Songti SC'. Modifies the `body` element.
 #' @param text_font_base Body Text Base Font (Total Failure Fallback). Defaults to serif. Modifies the `body` element.
-#' @param header_font_google Use `google_font()` to specify header font. Defaults to `google_font("Cabin", "600", "600i")`. Modifies the `body` element.
-#' @param header_font_family Header Font Family (xaringan default is `'Yanone Kaffeesatz'`). Defaults to `NULL`. Modifies the `h1, h2, h3` elements.
-#' @param header_font_weight Header Font Weight. Defaults to normal. Modifies the `h1, h2, h3` elements.
-#' @param header_font_url Header Font URL. Defaults to `NULL`. Modifies the `@import url` elements.
-#' @param code_font_google Use `google_font()` to specify code font. Defaults to `google_font("Source Code Pro", "400", "700")`. Modifies the `body` element.
-#' @param code_font_family Code Font Family. Defaults to `NULL`. Modifies the `.remark-code, .remark-inline-code` classes.
+#' @param header_font_google Use `google_font()` to specify header font. Defaults to `NULL`. Modifies the `body` element.
+#' @param header_font_family Header Font Family (xaringan default is `'Yanone Kaffeesatz'`). Defaults to Cabin. Modifies the `h1, h2, h3` elements.
+#' @param header_font_weight Header Font Weight. Defaults to 600. Modifies the `h1, h2, h3` elements.
+#' @param header_font_url Header Font URL. Defaults to https://fonts.googleapis.com/css?family=Cabin:600,600i&display=swap. Modifies the `@import url` elements.
+#' @param code_font_google Use `google_font()` to specify code font. Defaults to `NULL`. Modifies the `body` element.
+#' @param code_font_family Code Font Family. Defaults to Source Code Pro. Modifies the `.remark-code, .remark-inline-code` classes.
 #' @param code_font_size Code Text Font Size. Defaults to 0.9rem. Modifies the `.remark-inline` class.
-#' @param code_font_url Code Font URL. Defaults to `NULL`. Modifies the `@import url` elements.
+#' @param code_font_url Code Font URL. Defaults to https://fonts.googleapis.com/css?family=Source+Code+Pro:400,700&display=swap. Modifies the `@import url` elements.
 #' @param code_font_family_fallback Code Font Fallback. Defaults to 'Lucida Console', Monaco. Modifies the `.remark-code, .remark-inline-code` classes.
 #' @param colors A named vector of custom colors. The names of the colors
 #'   become CSS variables and classes that can be used within your slides.
   header_background_content_padding_top = "7rem",
   header_background_ignore_classes = c('normal', 'inverse', 'title', 'middle', 'bottom'),
   text_slide_number_font_size = "0.9rem",
-  text_font_google = google_font("Noto Sans", "400", "400i", "700", "700i"),
-  text_font_family = NULL,
+  text_font_google = NULL,
+  text_font_family = "Noto Sans",
   text_font_weight = "normal",
-  text_font_url = NULL,
+  text_font_url = "https://fonts.googleapis.com/css?family=Noto+Sans:400,400i,700,700i&display=swap",
   text_font_family_fallback = "'Palatino Linotype', 'Book Antiqua', Palatino, 'Microsoft YaHei', 'Songti SC'",
   text_font_base = "serif",
-  header_font_google = google_font("Cabin", "600", "600i"),
-  header_font_family = NULL,
-  header_font_weight = "normal",
-  header_font_url = NULL,
-  code_font_google = google_font("Source Code Pro", "400", "700"),
-  code_font_family = NULL,
+  header_font_google = NULL,
+  header_font_family = "Cabin",
+  header_font_weight = "600",
+  header_font_url = "https://fonts.googleapis.com/css?family=Cabin:600,600i&display=swap",
+  code_font_google = NULL,
+  code_font_family = "Source Code Pro",
   code_font_size = "0.9rem",
-  code_font_url = NULL,
+  code_font_url = "https://fonts.googleapis.com/css?family=Source+Code+Pro:400,700&display=swap",
   code_font_family_fallback = "'Lucida Console', Monaco",
   colors = NULL,
   extra_css = NULL,

R/style_mono_accent.R

 #' @param header_background_content_padding_top Top Padding for Content in Slide with Header with Background. Defaults to 7rem. Modifies the `.remark-slide-content` class.
 #' @param header_background_ignore_classes Slide Classes Where Header with Background will not be Applied. Defaults to `c('normal', 'inverse', 'title', 'middle', 'bottom')`. Modifies the `.remark-slide-content` class.
 #' @param text_slide_number_font_size Slide Number Text Font Size. Defaults to 0.9rem. Modifies the `.remark-slide-number` class.
-#' @param text_font_google Use `google_font()` to specify body font. Defaults to `google_font("Noto Sans", "400", "400i", "700", "700i")`. Modifies the `body` element.
-#' @param text_font_family Body Text Font Family (xaringan default is `'Droid Serif'`). Defaults to `NULL`. Modifies the `body` element.
+#' @param text_font_google Use `google_font()` to specify body font. Defaults to `NULL`. Modifies the `body` element.
+#' @param text_font_family Body Text Font Family (xaringan default is `'Droid Serif'`). Defaults to Noto Sans. Modifies the `body` element.
 #' @param text_font_weight Body Text Font Weight. Defaults to normal. Modifies the `body` element.
-#' @param text_font_url Body Text Font URL(s). Defaults to `NULL`. Modifies the `@import url()` elements.
+#' @param text_font_url Body Text Font URL(s). Defaults to https://fonts.googleapis.com/css?family=Noto+Sans:400,400i,700,700i&display=swap. Modifies the `@import url()` elements.
 #' @param text_font_family_fallback Body Text Font Fallbacks. Defaults to 'Palatino Linotype', 'Book Antiqua', Palatino, 'Microsoft YaHei', 'Songti SC'. Modifies the `body` element.
 #' @param text_font_base Body Text Base Font (Total Failure Fallback). Defaults to serif. Modifies the `body` element.
-#' @param header_font_google Use `google_font()` to specify header font. Defaults to `google_font("Cabin", "600", "600i")`. Modifies the `body` element.
-#' @param header_font_family Header Font Family (xaringan default is `'Yanone Kaffeesatz'`). Defaults to `NULL`. Modifies the `h1, h2, h3` elements.
-#' @param header_font_weight Header Font Weight. Defaults to normal. Modifies the `h1, h2, h3` elements.
-#' @param header_font_url Header Font URL. Defaults to `NULL`. Modifies the `@import url` elements.
-#' @param code_font_google Use `google_font()` to specify code font. Defaults to `google_font("Source Code Pro", "400", "700")`. Modifies the `body` element.
-#' @param code_font_family Code Font Family. Defaults to `NULL`. Modifies the `.remark-code, .remark-inline-code` classes.
+#' @param header_font_google Use `google_font()` to specify header font. Defaults to `NULL`. Modifies the `body` element.
+#' @param header_font_family Header Font Family (xaringan default is `'Yanone Kaffeesatz'`). Defaults to Cabin. Modifies the `h1, h2, h3` elements.
+#' @param header_font_weight Header Font Weight. Defaults to 600. Modifies the `h1, h2, h3` elements.
+#' @param header_font_url Header Font URL. Defaults to https://fonts.googleapis.com/css?family=Cabin:600,600i&display=swap. Modifies the `@import url` elements.
+#' @param code_font_google Use `google_font()` to specify code font. Defaults to `NULL`. Modifies the `body` element.
+#' @param code_font_family Code Font Family. Defaults to Source Code Pro. Modifies the `.remark-code, .remark-inline-code` classes.
 #' @param code_font_size Code Text Font Size. Defaults to 0.9rem. Modifies the `.remark-inline` class.
-#' @param code_font_url Code Font URL. Defaults to `NULL`. Modifies the `@import url` elements.
+#' @param code_font_url Code Font URL. Defaults to https://fonts.googleapis.com/css?family=Source+Code+Pro:400,700&display=swap. Modifies the `@import url` elements.
 #' @param code_font_family_fallback Code Font Fallback. Defaults to 'Lucida Console', Monaco. Modifies the `.remark-code, .remark-inline-code` classes.
 #' @param colors A named vector of custom colors. The names of the colors
 #'   become CSS variables and classes that can be used within your slides.
   header_background_content_padding_top = "7rem",
   header_background_ignore_classes = c('normal', 'inverse', 'title', 'middle', 'bottom'),
   text_slide_number_font_size = "0.9rem",
-  text_font_google = google_font("Noto Sans", "400", "400i", "700", "700i"),
-  text_font_family = NULL,
+  text_font_google = NULL,
+  text_font_family = "Noto Sans",
   text_font_weight = "normal",
-  text_font_url = NULL,
+  text_font_url = "https://fonts.googleapis.com/css?family=Noto+Sans:400,400i,700,700i&display=swap",
   text_font_family_fallback = "'Palatino Linotype', 'Book Antiqua', Palatino, 'Microsoft YaHei', 'Songti SC'",
   text_font_base = "serif",
-  header_font_google = google_font("Cabin", "600", "600i"),
-  header_font_family = NULL,
-  header_font_weight = "normal",
-  header_font_url = NULL,
-  code_font_google = google_font("Source Code Pro", "400", "700"),
-  code_font_family = NULL,
+  header_font_google = NULL,
+  header_font_family = "Cabin",
+  header_font_weight = "600",
+  header_font_url = "https://fonts.googleapis.com/css?family=Cabin:600,600i&display=swap",
+  code_font_google = NULL,
+  code_font_family = "Source Code Pro",
   code_font_size = "0.9rem",
-  code_font_url = NULL,
+  code_font_url = "https://fonts.googleapis.com/css?family=Source+Code+Pro:400,700&display=swap",
   code_font_family_fallback = "'Lucida Console', Monaco",
   colors = NULL,
   extra_css = NULL,

R/style_mono_accent_inverse.R

 #' @param header_background_content_padding_top Top Padding for Content in Slide with Header with Background. Defaults to 7rem. Modifies the `.remark-slide-content` class.
 #' @param header_background_ignore_classes Slide Classes Where Header with Background will not be Applied. Defaults to `c('normal', 'inverse', 'title', 'middle', 'bottom')`. Modifies the `.remark-slide-content` class.
 #' @param text_slide_number_font_size Slide Number Text Font Size. Defaults to 0.9rem. Modifies the `.remark-slide-number` class.
-#' @param text_font_google Use `google_font()` to specify body font. Defaults to `google_font("Noto Sans", "400", "400i", "700", "700i")`. Modifies the `body` element.
-#' @param text_font_family Body Text Font Family (xaringan default is `'Droid Serif'`). Defaults to `NULL`. Modifies the `body` element.
+#' @param text_font_google Use `google_font()` to specify body font. Defaults to `NULL`. Modifies the `body` element.
+#' @param text_font_family Body Text Font Family (xaringan default is `'Droid Serif'`). Defaults to Noto Sans. Modifies the `body` element.
 #' @param text_font_weight Body Text Font Weight. Defaults to normal. Modifies the `body` element.
-#' @param text_font_url Body Text Font URL(s). Defaults to `NULL`. Modifies the `@import url()` elements.
+#' @param text_font_url Body Text Font URL(s). Defaults to https://fonts.googleapis.com/css?family=Noto+Sans:400,400i,700,700i&display=swap. Modifies the `@import url()` elements.
 #' @param text_font_family_fallback Body Text Font Fallbacks. Defaults to 'Palatino Linotype', 'Book Antiqua', Palatino, 'Microsoft YaHei', 'Songti SC'. Modifies the `body` element.
 #' @param text_font_base Body Text Base Font (Total Failure Fallback). Defaults to serif. Modifies the `body` element.
-#' @param header_font_google Use `google_font()` to specify header font. Defaults to `google_font("Cabin", "600", "600i")`. Modifies the `body` element.
-#' @param header_font_family Header Font Family (xaringan default is `'Yanone Kaffeesatz'`). Defaults to `NULL`. Modifies the `h1, h2, h3` elements.
-#' @param header_font_weight Header Font Weight. Defaults to normal. Modifies the `h1, h2, h3` elements.
-#' @param header_font_url Header Font URL. Defaults to `NULL`. Modifies the `@import url` elements.
-#' @param code_font_google Use `google_font()` to specify code font. Defaults to `google_font("Source Code Pro", "400", "700")`. Modifies the `body` element.
-#' @param code_font_family Code Font Family. Defaults to `NULL`. Modifies the `.remark-code, .remark-inline-code` classes.
+#' @param header_font_google Use `google_font()` to specify header font. Defaults to `NULL`. Modifies the `body` element.
+#' @param header_font_family Header Font Family (xaringan default is `'Yanone Kaffeesatz'`). Defaults to Cabin. Modifies the `h1, h2, h3` elements.
+#' @param header_font_weight Header Font Weight. Defaults to 600. Modifies the `h1, h2, h3` elements.
+#' @param header_font_url Header Font URL. Defaults to https://fonts.googleapis.com/css?family=Cabin:600,600i&display=swap. Modifies the `@import url` elements.
+#' @param code_font_google Use `google_font()` to specify code font. Defaults to `NULL`. Modifies the `body` element.
+#' @param code_font_family Code Font Family. Defaults to Source Code Pro. Modifies the `.remark-code, .remark-inline-code` classes.
 #' @param code_font_size Code Text Font Size. Defaults to 0.9rem. Modifies the `.remark-inline` class.
-#' @param code_font_url Code Font URL. Defaults to `NULL`. Modifies the `@import url` elements.
+#' @param code_font_url Code Font URL. Defaults to https://fonts.googleapis.com/css?family=Source+Code+Pro:400,700&display=swap. Modifies the `@import url` elements.
 #' @param code_font_family_fallback Code Font Fallback. Defaults to 'Lucida Console', Monaco. Modifies the `.remark-code, .remark-inline-code` classes.
 #' @param colors A named vector of custom colors. The names of the colors
 #'   become CSS variables and classes that can be used within your slides.
   header_background_content_padding_top = "7rem",
   header_background_ignore_classes = c('normal', 'inverse', 'title', 'middle', 'bottom'),
   text_slide_number_font_size = "0.9rem",
-  text_font_google = google_font("Noto Sans", "400", "400i", "700", "700i"),
-  text_font_family = NULL,
+  text_font_google = NULL,
+  text_font_family = "Noto Sans",
   text_font_weight = "normal",
-  text_font_url = NULL,
+  text_font_url = "https://fonts.googleapis.com/css?family=Noto+Sans:400,400i,700,700i&display=swap",
   text_font_family_fallback = "'Palatino Linotype', 'Book Antiqua', Palatino, 'Microsoft YaHei', 'Songti SC'",
   text_font_base = "serif",
-  header_font_google = google_font("Cabin", "600", "600i"),
-  header_font_family = NULL,
-  header_font_weight = "normal",
-  header_font_url = NULL,
-  code_font_google = google_font("Source Code Pro", "400", "700"),
-  code_font_family = NULL,
+  header_font_google = NULL,
+  header_font_family = "Cabin",
+  header_font_weight = "600",
+  header_font_url = "https://fonts.googleapis.com/css?family=Cabin:600,600i&display=swap",
+  code_font_google = NULL,
+  code_font_family = "Source Code Pro",
   code_font_size = "0.9rem",
-  code_font_url = NULL,
+  code_font_url = "https://fonts.googleapis.com/css?family=Source+Code+Pro:400,700&display=swap",
   code_font_family_fallback = "'Lucida Console', Monaco",
   colors = NULL,
   extra_css = NULL,

R/style_mono_dark.R

 #' @param header_background_content_padding_top Top Padding for Content in Slide with Header with Background. Defaults to 7rem. Modifies the `.remark-slide-content` class.
 #' @param header_background_ignore_classes Slide Classes Where Header with Background will not be Applied. Defaults to `c('normal', 'inverse', 'title', 'middle', 'bottom')`. Modifies the `.remark-slide-content` class.
 #' @param text_slide_number_font_size Slide Number Text Font Size. Defaults to 0.9rem. Modifies the `.remark-slide-number` class.
-#' @param text_font_google Use `google_font()` to specify body font. Defaults to `google_font("Noto Sans", "400", "400i", "700", "700i")`. Modifies the `body` element.
-#' @param text_font_family Body Text Font Family (xaringan default is `'Droid Serif'`). Defaults to `NULL`. Modifies the `body` element.
+#' @param text_font_google Use `google_font()` to specify body font. Defaults to `NULL`. Modifies the `body` element.
+#' @param text_font_family Body Text Font Family (xaringan default is `'Droid Serif'`). Defaults to Noto Sans. Modifies the `body` element.
 #' @param text_font_weight Body Text Font Weight. Defaults to normal. Modifies the `body` element.
-#' @param text_font_url Body Text Font URL(s). Defaults to `NULL`. Modifies the `@import url()` elements.
+#' @param text_font_url Body Text Font URL(s). Defaults to https://fonts.googleapis.com/css?family=Noto+Sans:400,400i,700,700i&display=swap. Modifies the `@import url()` elements.
 #' @param text_font_family_fallback Body Text Font Fallbacks. Defaults to 'Palatino Linotype', 'Book Antiqua', Palatino, 'Microsoft YaHei', 'Songti SC'. Modifies the `body` element.
 #' @param text_font_base Body Text Base Font (Total Failure Fallback). Defaults to serif. Modifies the `body` element.
-#' @param header_font_google Use `google_font()` to specify header font. Defaults to `google_font("Cabin", "600", "600i")`. Modifies the `body` element.
-#' @param header_font_family Header Font Family (xaringan default is `'Yanone Kaffeesatz'`). Defaults to `NULL`. Modifies the `h1, h2, h3` elements.
-#' @param header_font_weight Header Font Weight. Defaults to normal. Modifies the `h1, h2, h3` elements.
-#' @param header_font_url Header Font URL. Defaults to `NULL`. Modifies the `@import url` elements.
-#' @param code_font_google Use `google_font()` to specify code font. Defaults to `google_font("Source Code Pro", "400", "700")`. Modifies the `body` element.
-#' @param code_font_family Code Font Family. Defaults to `NULL`. Modifies the `.remark-code, .remark-inline-code` classes.
+#' @param header_font_google Use `google_font()` to specify header font. Defaults to `NULL`. Modifies the `body` element.
+#' @param header_font_family Header Font Family (xaringan default is `'Yanone Kaffeesatz'`). Defaults to Cabin. Modifies the `h1, h2, h3` elements.
+#' @param header_font_weight Header Font Weight. Defaults to 600. Modifies the `h1, h2, h3` elements.
+#' @param header_font_url Header Font URL. Defaults to https://fonts.googleapis.com/css?family=Cabin:600,600i&display=swap. Modifies the `@import url` elements.
+#' @param code_font_google Use `google_font()` to specify code font. Defaults to `NULL`. Modifies the `body` element.
+#' @param code_font_family Code Font Family. Defaults to Source Code Pro. Modifies the `.remark-code, .remark-inline-code` classes.
 #' @param code_font_size Code Text Font Size. Defaults to 0.9rem. Modifies the `.remark-inline` class.
-#' @param code_font_url Code Font URL. Defaults to `NULL`. Modifies the `@import url` elements.
+#' @param code_font_url Code Font URL. Defaults to https://fonts.googleapis.com/css?family=Source+Code+Pro:400,700&display=swap. Modifies the `@import url` elements.
 #' @param code_font_family_fallback Code Font Fallback. Defaults to 'Lucida Console', Monaco. Modifies the `.remark-code, .remark-inline-code` classes.
 #' @param colors A named vector of custom colors. The names of the colors
 #'   become CSS variables and classes that can be used within your slides.
   header_background_content_padding_top = "7rem",
   header_background_ignore_classes = c('normal', 'inverse', 'title', 'middle', 'bottom'),
   text_slide_number_font_size = "0.9rem",
-  text_font_google = google_font("Noto Sans", "400", "400i", "700", "700i"),
-  text_font_family = NULL,
+  text_font_google = NULL,
+  text_font_family = "Noto Sans",
   text_font_weight = "normal",
-  text_font_url = NULL,
+  text_font_url = "https://fonts.googleapis.com/css?family=Noto+Sans:400,400i,700,700i&display=swap",
   text_font_family_fallback = "'Palatino Linotype', 'Book Antiqua', Palatino, 'Microsoft YaHei', 'Songti SC'",
   text_font_base = "serif",
-  header_font_google = google_font("Cabin", "600", "600i"),
-  header_font_family = NULL,
-  header_font_weight = "normal",
-  header_font_url = NULL,
-  code_font_google = google_font("Source Code Pro", "400", "700"),
-  code_font_family = NULL,
+  header_font_google = NULL,
+  header_font_family = "Cabin",
+  header_font_weight = "600",
+  header_font_url = "https://fonts.googleapis.com/css?family=Cabin:600,600i&display=swap",
+  code_font_google = NULL,
+  code_font_family = "Source Code Pro",
   code_font_size = "0.9rem",
-  code_font_url = NULL,
+  code_font_url = "https://fonts.googleapis.com/css?family=Source+Code+Pro:400,700&display=swap",
   code_font_family_fallback = "'Lucida Console', Monaco",
   colors = NULL,
   extra_css = NULL,

R/style_mono_light.R

 #' @param header_background_content_padding_top Top Padding for Content in Slide with Header with Background. Defaults to 7rem. Modifies the `.remark-slide-content` class.
 #' @param header_background_ignore_classes Slide Classes Where Header with Background will not be Applied. Defaults to `c('normal', 'inverse', 'title', 'middle', 'bottom')`. Modifies the `.remark-slide-content` class.
 #' @param text_slide_number_font_size Slide Number Text Font Size. Defaults to 0.9rem. Modifies the `.remark-slide-number` class.
-#' @param text_font_google Use `google_font()` to specify body font. Defaults to `google_font("Noto Sans", "400", "400i", "700", "700i")`. Modifies the `body` element.
-#' @param text_font_family Body Text Font Family (xaringan default is `'Droid Serif'`). Defaults to `NULL`. Modifies the `body` element.
+#' @param text_font_google Use `google_font()` to specify body font. Defaults to `NULL`. Modifies the `body` element.
+#' @param text_font_family Body Text Font Family (xaringan default is `'Droid Serif'`). Defaults to Noto Sans. Modifies the `body` element.
 #' @param text_font_weight Body Text Font Weight. Defaults to normal. Modifies the `body` element.
-#' @param text_font_url Body Text Font URL(s). Defaults to `NULL`. Modifies the `@import url()` elements.
+#' @param text_font_url Body Text Font URL(s). Defaults to https://fonts.googleapis.com/css?family=Noto+Sans:400,400i,700,700i&display=swap. Modifies the `@import url()` elements.
 #' @param text_font_family_fallback Body Text Font Fallbacks. Defaults to 'Palatino Linotype', 'Book Antiqua', Palatino, 'Microsoft YaHei', 'Songti SC'. Modifies the `body` element.
 #' @param text_font_base Body Text Base Font (Total Failure Fallback). Defaults to serif. Modifies the `body` element.
-#' @param header_font_google Use `google_font()` to specify header font. Defaults to `google_font("Cabin", "600", "600i")`. Modifies the `body` element.
-#' @param header_font_family Header Font Family (xaringan default is `'Yanone Kaffeesatz'`). Defaults to `NULL`. Modifies the `h1, h2, h3` elements.
-#' @param header_font_weight Header Font Weight. Defaults to normal. Modifies the `h1, h2, h3` elements.
-#' @param header_font_url Header Font URL. Defaults to `NULL`. Modifies the `@import url` elements.
-#' @param code_font_google Use `google_font()` to specify code font. Defaults to `google_font("Source Code Pro", "400", "700")`. Modifies the `body` element.
-#' @param code_font_family Code Font Family. Defaults to `NULL`. Modifies the `.remark-code, .remark-inline-code` classes.
+#' @param header_font_google Use `google_font()` to specify header font. Defaults to `NULL`. Modifies the `body` element.
+#' @param header_font_family Header Font Family (xaringan default is `'Yanone Kaffeesatz'`). Defaults to Cabin. Modifies the `h1, h2, h3` elements.
+#' @param header_font_weight Header Font Weight. Defaults to 600. Modifies the `h1, h2, h3` elements.
+#' @param header_font_url Header Font URL. Defaults to https://fonts.googleapis.com/css?family=Cabin:600,600i&display=swap. Modifies the `@import url` elements.
+#' @param code_font_google Use `google_font()` to specify code font. Defaults to `NULL`. Modifies the `body` element.
+#' @param code_font_family Code Font Family. Defaults to Source Code Pro. Modifies the `.remark-code, .remark-inline-code` classes.
 #' @param code_font_size Code Text Font Size. Defaults to 0.9rem. Modifies the `.remark-inline` class.
-#' @param code_font_url Code Font URL. Defaults to `NULL`. Modifies the `@import url` elements.
+#' @param code_font_url Code Font URL. Defaults to https://fonts.googleapis.com/css?family=Source+Code+Pro:400,700&display=swap. Modifies the `@import url` elements.
 #' @param code_font_family_fallback Code Font Fallback. Defaults to 'Lucida Console', Monaco. Modifies the `.remark-code, .remark-inline-code` classes.
 #' @param colors A named vector of custom colors. The names of the colors
 #'   become CSS variables and classes that can be used within your slides.
   header_background_content_padding_top = "7rem",
   header_background_ignore_classes = c('normal', 'inverse', 'title', 'middle', 'bottom'),
   text_slide_number_font_size = "0.9rem",
-  text_font_google = google_font("Noto Sans", "400", "400i", "700", "700i"),
-  text_font_family = NULL,
+  text_font_google = NULL,
+  text_font_family = "Noto Sans",
   text_font_weight = "normal",
-  text_font_url = NULL,
+  text_font_url = "https://fonts.googleapis.com/css?family=Noto+Sans:400,400i,700,700i&display=swap",
   text_font_family_fallback = "'Palatino Linotype', 'Book Antiqua', Palatino, 'Microsoft YaHei', 'Songti SC'",
   text_font_base = "serif",
-  header_font_google = google_font("Cabin", "600", "600i"),
-  header_font_family = NULL,
-  header_font_weight = "normal",
-  header_font_url = NULL,
-  code_font_google = google_font("Source Code Pro", "400", "700"),
-  code_font_family = NULL,
+  header_font_google = NULL,
+  header_font_family = "Cabin",
+  header_font_weight = "600",
+  header_font_url = "https://fonts.googleapis.com/css?family=Cabin:600,600i&display=swap",
+  code_font_google = NULL,
+  code_font_family = "Source Code Pro",
   code_font_size = "0.9rem",
-  code_font_url = NULL,
+  code_font_url = "https://fonts.googleapis.com/css?family=Source+Code+Pro:400,700&display=swap",
   code_font_family_fallback = "'Lucida Console', Monaco",
   colors = NULL,
   extra_css = NULL,

R/style_solarized_dark.R

 #' @param header_background_content_padding_top Top Padding for Content in Slide with Header with Background. Defaults to 7rem. Modifies the `.remark-slide-content` class.
 #' @param header_background_ignore_classes Slide Classes Where Header with Background will not be Applied. Defaults to `c('normal', 'inverse', 'title', 'middle', 'bottom')`. Modifies the `.remark-slide-content` class.
 #' @param text_slide_number_font_size Slide Number Text Font Size. Defaults to 0.9rem. Modifies the `.remark-slide-number` class.
-#' @param text_font_google Use `google_font()` to specify body font. Defaults to `google_font("Noto Sans", "400", "400i", "700", "700i")`. Modifies the `body` element.
-#' @param text_font_family Body Text Font Family (xaringan default is `'Droid Serif'`). Defaults to `NULL`. Modifies the `body` element.
+#' @param text_font_google Use `google_font()` to specify body font. Defaults to `NULL`. Modifies the `body` element.
+#' @param text_font_family Body Text Font Family (xaringan default is `'Droid Serif'`). Defaults to Noto Sans. Modifies the `body` element.
 #' @param text_font_weight Body Text Font Weight. Defaults to normal. Modifies the `body` element.
-#' @param text_font_url Body Text Font URL(s). Defaults to `NULL`. Modifies the `@import url()` elements.
+#' @param text_font_url Body Text Font URL(s). Defaults to https://fonts.googleapis.com/css?family=Noto+Sans:400,400i,700,700i&display=swap. Modifies the `@import url()` elements.
 #' @param text_font_family_fallback Body Text Font Fallbacks. Defaults to 'Palatino Linotype', 'Book Antiqua', Palatino, 'Microsoft YaHei', 'Songti SC'. Modifies the `body` element.
 #' @param text_font_base Body Text Base Font (Total Failure Fallback). Defaults to serif. Modifies the `body` element.
-#' @param header_font_google Use `google_font()` to specify header font. Defaults to `google_font("Cabin", "600", "600i")`. Modifies the `body` element.
-#' @param header_font_family Header Font Family (xaringan default is `'Yanone Kaffeesatz'`). Defaults to `NULL`. Modifies the `h1, h2, h3` elements.
-#' @param header_font_weight Header Font Weight. Defaults to normal. Modifies the `h1, h2, h3` elements.
-#' @param header_font_url Header Font URL. Defaults to `NULL`. Modifies the `@import url` elements.
-#' @param code_font_google Use `google_font()` to specify code font. Defaults to `google_font("Source Code Pro", "400", "700")`. Modifies the `body` element.
-#' @param code_font_family Code Font Family. Defaults to `NULL`. Modifies the `.remark-code, .remark-inline-code` classes.
+#' @param header_font_google Use `google_font()` to specify header font. Defaults to `NULL`. Modifies the `body` element.
+#' @param header_font_family Header Font Family (xaringan default is `'Yanone Kaffeesatz'`). Defaults to Cabin. Modifies the `h1, h2, h3` elements.
+#' @param header_font_weight Header Font Weight. Defaults to 600. Modifies the `h1, h2, h3` elements.
+#' @param header_font_url Header Font URL. Defaults to https://fonts.googleapis.com/css?family=Cabin:600,600i&display=swap. Modifies the `@import url` elements.
+#' @param code_font_google Use `google_font()` to specify code font. Defaults to `NULL`. Modifies the `body` element.
+#' @param code_font_family Code Font Family. Defaults to Source Code Pro. Modifies the `.remark-code, .remark-inline-code` classes.
 #' @param code_font_size Code Text Font Size. Defaults to 0.9rem. Modifies the `.remark-inline` class.
-#' @param code_font_url Code Font URL. Defaults to `NULL`. Modifies the `@import url` elements.
+#' @param code_font_url Code Font URL. Defaults to https://fonts.googleapis.com/css?family=Source+Code+Pro:400,700&display=swap. Modifies the `@import url` elements.
 #' @param code_font_family_fallback Code Font Fallback. Defaults to 'Lucida Console', Monaco. Modifies the `.remark-code, .remark-inline-code` classes.
 #' @param colors A named vector of custom colors. The names of the colors
 #'   become CSS variables and classes that can be used within your slides.
   header_background_content_padding_top = "7rem",
   header_background_ignore_classes = c('normal', 'inverse', 'title', 'middle', 'bottom'),
   text_slide_number_font_size = "0.9rem",
-  text_font_google = google_font("Noto Sans", "400", "400i", "700", "700i"),
-  text_font_family = NULL,
+  text_font_google = NULL,
+  text_font_family = "Noto Sans",
   text_font_weight = "normal",
-  text_font_url = NULL,
+  text_font_url = "https://fonts.googleapis.com/css?family=Noto+Sans:400,400i,700,700i&display=swap",
   text_font_family_fallback = "'Palatino Linotype', 'Book Antiqua', Palatino, 'Microsoft YaHei', 'Songti SC'",
   text_font_base = "serif",
-  header_font_google = google_font("Cabin", "600", "600i"),
-  header_font_family = NULL,
-  header_font_weight = "normal",
-  header_font_url = NULL,
-  code_font_google = google_font("Source Code Pro", "400", "700"),
-  code_font_family = NULL,
+  header_font_google = NULL,
+  header_font_family = "Cabin",
+  header_font_weight = "600",
+  header_font_url = "https://fonts.googleapis.com/css?family=Cabin:600,600i&display=swap",
+  code_font_google = NULL,
+  code_font_family = "Source Code Pro",
   code_font_size = "0.9rem",
-  code_font_url = NULL,
+  code_font_url = "https://fonts.googleapis.com/css?family=Source+Code+Pro:400,700&display=swap",
   code_font_family_fallback = "'Lucida Console', Monaco",
   colors = NULL,
   extra_css = NULL,

R/style_solarized_light.R

 #' @param header_background_content_padding_top Top Padding for Content in Slide with Header with Background. Defaults to 7rem. Modifies the `.remark-slide-content` class.
 #' @param header_background_ignore_classes Slide Classes Where Header with Background will not be Applied. Defaults to `c('normal', 'inverse', 'title', 'middle', 'bottom')`. Modifies the `.remark-slide-content` class.
 #' @param text_slide_number_font_size Slide Number Text Font Size. Defaults to 0.9rem. Modifies the `.remark-slide-number` class.
-#' @param text_font_google Use `google_font()` to specify body font. Defaults to `google_font("Noto Sans", "400", "400i", "700", "700i")`. Modifies the `body` element.
-#' @param text_font_family Body Text Font Family (xaringan default is `'Droid Serif'`). Defaults to `NULL`. Modifies the `body` element.
+#' @param text_font_google Use `google_font()` to specify body font. Defaults to `NULL`. Modifies the `body` element.
+#' @param text_font_family Body Text Font Family (xaringan default is `'Droid Serif'`). Defaults to Noto Sans. Modifies the `body` element.
 #' @param text_font_weight Body Text Font Weight. Defaults to normal. Modifies the `body` element.
-#' @param text_font_url Body Text Font URL(s). Defaults to `NULL`. Modifies the `@import url()` elements.
+#' @param text_font_url Body Text Font URL(s). Defaults to https://fonts.googleapis.com/css?family=Noto+Sans:400,400i,700,700i&display=swap. Modifies the `@import url()` elements.
 #' @param text_font_family_fallback Body Text Font Fallbacks. Defaults to 'Palatino Linotype', 'Book Antiqua', Palatino, 'Microsoft YaHei', 'Songti SC'. Modifies the `body` element.
 #' @param text_font_base Body Text Base Font (Total Failure Fallback). Defaults to serif. Modifies the `body` element.
-#' @param header_font_google Use `google_font()` to specify header font. Defaults to `google_font("Cabin", "600", "600i")`. Modifies the `body` element.
-#' @param header_font_family Header Font Family (xaringan default is `'Yanone Kaffeesatz'`). Defaults to `NULL`. Modifies the `h1, h2, h3` elements.
-#' @param header_font_weight Header Font Weight. Defaults to normal. Modifies the `h1, h2, h3` elements.
-#' @param header_font_url Header Font URL. Defaults to `NULL`. Modifies the `@import url` elements.
-#' @param code_font_google Use `google_font()` to specify code font. Defaults to `google_font("Source Code Pro", "400", "700")`. Modifies the `body` element.
-#' @param code_font_family Code Font Family. Defaults to `NULL`. Modifies the `.remark-code, .remark-inline-code` classes.
+#' @param header_font_google Use `google_font()` to specify header font. Defaults to `NULL`. Modifies the `body` element.
+#' @param header_font_family Header Font Family (xaringan default is `'Yanone Kaffeesatz'`). Defaults to Cabin. Modifies the `h1, h2, h3` elements.
+#' @param header_font_weight Header Font Weight. Defaults to 600. Modifies the `h1, h2, h3` elements.
+#' @param header_font_url Header Font URL. Defaults to https://fonts.googleapis.com/css?family=Cabin:600,600i&display=swap. Modifies the `@import url` elements.
+#' @param code_font_google Use `google_font()` to specify code font. Defaults to `NULL`. Modifies the `body` element.
+#' @param code_font_family Code Font Family. Defaults to Source Code Pro. Modifies the `.remark-code, .remark-inline-code` classes.
 #' @param code_font_size Code Text Font Size. Defaults to 0.9rem. Modifies the `.remark-inline` class.
-#' @param code_font_url Code Font URL. Defaults to `NULL`. Modifies the `@import url` elements.
+#' @param code_font_url Code Font URL. Defaults to https://fonts.googleapis.com/css?family=Source+Code+Pro:400,700&display=swap. Modifies the `@import url` elements.
 #' @param code_font_family_fallback Code Font Fallback. Defaults to 'Lucida Console', Monaco. Modifies the `.remark-code, .remark-inline-code` classes.
 #' @param colors A named vector of custom colors. The names of the colors
 #'   become CSS variables and classes that can be used within your slides.
   header_background_content_padding_top = "7rem",
   header_background_ignore_classes = c('normal', 'inverse', 'title', 'middle', 'bottom'),
   text_slide_number_font_size = "0.9rem",
-  text_font_google = google_font("Noto Sans", "400", "400i", "700", "700i"),
-  text_font_family = NULL,
+  text_font_google = NULL,
+  text_font_family = "Noto Sans",
   text_font_weight = "normal",
-  text_font_url = NULL,
+  text_font_url = "https://fonts.googleapis.com/css?family=Noto+Sans:400,400i,700,700i&display=swap",
   text_font_family_fallback = "'Palatino Linotype', 'Book Antiqua', Palatino, 'Microsoft YaHei', 'Songti SC'",
   text_font_base = "serif",
-  header_font_google = google_font("Cabin", "600", "600i"),
-  header_font_family = NULL,
-  header_font_weight = "normal",
-  header_font_url = NULL,
-  code_font_google = google_font("Source Code Pro", "400", "700"),
-  code_font_family = NULL,
+  header_font_google = NULL,
+  header_font_family = "Cabin",
+  header_font_weight = "600",
+  header_font_url = "https://fonts.googleapis.com/css?family=Cabin:600,600i&display=swap",
+  code_font_google = NULL,
+  code_font_family = "Source Code Pro",
   code_font_size = "0.9rem",
-  code_font_url = NULL,
+  code_font_url = "https://fonts.googleapis.com/css?family=Source+Code+Pro:400,700&display=swap",
   code_font_family_fallback = "'Lucida Console', Monaco",
   colors = NULL,
   extra_css = NULL,

R/style_xaringan.R

 #' @param header_background_content_padding_top Top Padding for Content in Slide with Header with Background. Defaults to 7rem. Modifies the `.remark-slide-content` class.
 #' @param header_background_ignore_classes Slide Classes Where Header with Background will not be Applied. Defaults to `c('normal', 'inverse', 'title', 'middle', 'bottom')`. Modifies the `.remark-slide-content` class.
 #' @param text_slide_number_font_size Slide Number Text Font Size. Defaults to 0.9rem. Modifies the `.remark-slide-number` class.
-#' @param text_font_google Use `google_font()` to specify body font. Defaults to `google_font("Noto Sans", "400", "400i", "700", "700i")`. Modifies the `body` element.
-#' @param text_font_family Body Text Font Family (xaringan default is `'Droid Serif'`). Defaults to `NULL`. Modifies the `body` element.
+#' @param text_font_google Use `google_font()` to specify body font. Defaults to `NULL`. Modifies the `body` element.
+#' @param text_font_family Body Text Font Family (xaringan default is `'Droid Serif'`). Defaults to Noto Sans. Modifies the `body` element.
 #' @param text_font_weight Body Text Font Weight. Defaults to normal. Modifies the `body` element.
-#' @param text_font_url Body Text Font URL(s). Defaults to `NULL`. Modifies the `@import url()` elements.
+#' @param text_font_url Body Text Font URL(s). Defaults to https://fonts.googleapis.com/css?family=Noto+Sans:400,400i,700,700i&display=swap. Modifies the `@import url()` elements.
 #' @param text_font_family_fallback Body Text Font Fallbacks. Defaults to 'Palatino Linotype', 'Book Antiqua', Palatino, 'Microsoft YaHei', 'Songti SC'. Modifies the `body` element.
 #' @param text_font_base Body Text Base Font (Total Failure Fallback). Defaults to serif. Modifies the `body` element.
-#' @param header_font_google Use `google_font()` to specify header font. Defaults to `google_font("Cabin", "600", "600i")`. Modifies the `body` element.
-#' @param header_font_family Header Font Family (xaringan default is `'Yanone Kaffeesatz'`). Defaults to `NULL`. Modifies the `h1, h2, h3` elements.
-#' @param header_font_weight Header Font Weight. Defaults to normal. Modifies the `h1, h2, h3` elements.
-#' @param header_font_url Header Font URL. Defaults to `NULL`. Modifies the `@import url` elements.
-#' @param code_font_google Use `google_font()` to specify code font. Defaults to `google_font("Source Code Pro", "400", "700")`. Modifies the `body` element.
-#' @param code_font_family Code Font Family. Defaults to `NULL`. Modifies the `.remark-code, .remark-inline-code` classes.
+#' @param header_font_google Use `google_font()` to specify header font. Defaults to `NULL`. Modifies the `body` element.
+#' @param header_font_family Header Font Family (xaringan default is `'Yanone Kaffeesatz'`). Defaults to Cabin. Modifies the `h1, h2, h3` elements.
+#' @param header_font_weight Header Font Weight. Defaults to 600. Modifies the `h1, h2, h3` elements.
+#' @param header_font_url Header Font URL. Defaults to https://fonts.googleapis.com/css?family=Cabin:600,600i&display=swap. Modifies the `@import url` elements.
+#' @param code_font_google Use `google_font()` to specify code font. Defaults to `NULL`. Modifies the `body` element.
+#' @param code_font_family Code Font Family. Defaults to Source Code Pro. Modifies the `.remark-code, .remark-inline-code` classes.
 #' @param code_font_size Code Text Font Size. Defaults to 0.9rem. Modifies the `.remark-inline` class.
-#' @param code_font_url Code Font URL. Defaults to `NULL`. Modifies the `@import url` elements.
+#' @param code_font_url Code Font URL. Defaults to https://fonts.googleapis.com/css?family=Source+Code+Pro:400,700&display=swap. Modifies the `@import url` elements.
 #' @param code_font_family_fallback Code Font Fallback. Defaults to 'Lucida Console', Monaco. Modifies the `.remark-code, .remark-inline-code` classes.
 #' @param colors A named vector of custom colors. The names of the colors
 #'   become CSS variables and classes that can be used within your slides.
   header_background_content_padding_top = "7rem",
   header_background_ignore_classes = c('normal', 'inverse', 'title', 'middle', 'bottom'),
   text_slide_number_font_size = "0.9rem",
-  text_font_google = google_font("Noto Sans", "400", "400i", "700", "700i"),
-  text_font_family = NULL,
+  text_font_google = NULL,
+  text_font_family = "Noto Sans",
   text_font_weight = "normal",
-  text_font_url = NULL,
+  text_font_url = "https://fonts.googleapis.com/css?family=Noto+Sans:400,400i,700,700i&display=swap",
   text_font_family_fallback = "'Palatino Linotype', 'Book Antiqua', Palatino, 'Microsoft YaHei', 'Songti SC'",
   text_font_base = "serif",
-  header_font_google = google_font("Cabin", "600", "600i"),
-  header_font_family = NULL,
-  header_font_weight = "normal",
-  header_font_url = NULL,
-  code_font_google = google_font("Source Code Pro", "400", "700"),
-  code_font_family = NULL,
+  header_font_google = NULL,
+  header_font_family = "Cabin",
+  header_font_weight = "600",
+  header_font_url = "https://fonts.googleapis.com/css?family=Cabin:600,600i&display=swap",
+  code_font_google = NULL,
+  code_font_family = "Source Code Pro",
   code_font_size = "0.9rem",
-  code_font_url = NULL,
+  code_font_url = "https://fonts.googleapis.com/css?family=Source+Code+Pro:400,700&display=swap",
   code_font_family_fallback = "'Lucida Console', Monaco",
   colors = NULL,
   extra_css = NULL,
     eval(parse(text = paste0(group, "_font_is_google <- 1")))
   }
   
+  is_default <- function(type, suffix, reference = style_xaringan) {
+    var <- paste0(type, "_", suffix)
+    default_value <- formals(reference)[[var]]
+    if (suffix == "font_family") {
+      default_value <- quote_elements_w_spaces(default_value)
+    }
+  
+    get(var, envir = parent.frame(2), inherits = FALSE) == default_value
+  }
+  
+  # the defaults are google fonts
+  for (var in c("text", "header", "code")) {
+    suffixes <- c("font_family", "font_weight", "font_url")
+    if (var == "code") suffixes <- setdiff(suffixes, "font_weight")
+    var_is_google <- all(vapply(suffixes, is_default, logical(1), type = var))
+    if (var_is_google) {
+      eval(parse(text = paste0(var, "_font_is_google <- 1")))
+    }
+  }
+  
   extra_font_imports <- if (is.null(extra_fonts)) "" else list2fonts(extra_fonts)
   extra_font_imports <- paste(extra_font_imports, collapse = "\n")
   

R/theme_settings.R

   , "header_background_content_padding_top", "7rem", ".remark-slide-content", "Top Padding for Content in Slide with Header with Background"
   , "header_background_ignore_classes", "{c('normal', 'inverse', 'title', 'middle', 'bottom')}", ".remark-slide-content", "Slide Classes Where Header with Background will not be Applied"
   , "text_slide_number_font_size", "0.9rem", ".remark-slide-number", "Slide Number Text Font Size"
-  , "text_font_google", "{google_font(\"Noto Sans\", \"400\", \"400i\", \"700\", \"700i\")}", "body", "Use `google_font()` to specify body font"
-  , "text_font_family", NULL, "body", "Body Text Font Family (xaringan default is `'Droid Serif'`)"
+  , "text_font_google", NULL, "body", "Use `google_font()` to specify body font"
+  , "text_font_family", "Noto Sans", "body", "Body Text Font Family (xaringan default is `'Droid Serif'`)"
   , "text_font_weight", "normal", "body", "Body Text Font Weight"
-  , "text_font_url", NULL, "@import url()", "Body Text Font URL(s)"
+  , "text_font_url", "https://fonts.googleapis.com/css?family=Noto+Sans:400,400i,700,700i&display=swap", "@import url()", "Body Text Font URL(s)"
   , "text_font_family_fallback", "'Palatino Linotype', 'Book Antiqua', Palatino, 'Microsoft YaHei', 'Songti SC'", "body", "Body Text Font Fallbacks"
   , "text_font_base", "serif", "body", "Body Text Base Font (Total Failure Fallback)"
-  , "header_font_google", "{google_font(\"Cabin\", \"600\", \"600i\")}", "body", "Use `google_font()` to specify header font"
-  , "header_font_family", NULL, "h1, h2, h3", "Header Font Family (xaringan default is `'Yanone Kaffeesatz'`)"
-  , "header_font_weight", "normal", "h1, h2, h3", "Header Font Weight"
-  , "header_font_url", NULL, "@import url", "Header Font URL"
-  , "code_font_google", "{google_font(\"Source Code Pro\", \"400\", \"700\")}", "body", "Use `google_font()` to specify code font"
-  , "code_font_family", NULL, ".remark-code, .remark-inline-code", "Code Font Family"
+  , "header_font_google", NULL, "body", "Use `google_font()` to specify header font"
+  , "header_font_family", "Cabin", "h1, h2, h3", "Header Font Family (xaringan default is `'Yanone Kaffeesatz'`)"
+  , "header_font_weight", "600", "h1, h2, h3", "Header Font Weight"
+  , "header_font_url", "https://fonts.googleapis.com/css?family=Cabin:600,600i&display=swap", "@import url", "Header Font URL"
+  , "code_font_google", NULL, "body", "Use `google_font()` to specify code font"
+  , "code_font_family", "Source Code Pro", ".remark-code, .remark-inline-code", "Code Font Family"
   , "code_font_size", "0.9rem", ".remark-inline", "Code Text Font Size"
-  , "code_font_url", NULL, "@import url", "Code Font URL"
+  , "code_font_url", "https://fonts.googleapis.com/css?family=Source+Code+Pro:400,700&display=swap", "@import url", "Code Font URL"
   , "code_font_family_fallback", "'Lucida Console', Monaco", ".remark-code, .remark-inline-code", "Code Font Fallback"
 )
 

inst/scripts/style_xaringan_body.R

   eval(parse(text = paste0(group, "_font_is_google <- 1")))
 }
 
+is_default <- function(type, suffix, reference = style_xaringan) {
+  var <- paste0(type, "_", suffix)
+  default_value <- formals(reference)[[var]]
+  if (suffix == "font_family") {
+    default_value <- quote_elements_w_spaces(default_value)
+  }
+
+  get(var, envir = parent.frame(2), inherits = FALSE) == default_value
+}
+
+# the defaults are google fonts
+for (var in c("text", "header", "code")) {
+  suffixes <- c("font_family", "font_weight", "font_url")
+  if (var == "code") suffixes <- setdiff(suffixes, "font_weight")
+  var_is_google <- all(vapply(suffixes, is_default, logical(1), type = var))
+  if (var_is_google) {
+    eval(parse(text = paste0(var, "_font_is_google <- 1")))
+  }
+}
+
 extra_font_imports <- if (is.null(extra_fonts)) "" else list2fonts(extra_fonts)
 extra_font_imports <- paste(extra_font_imports, collapse = "\n")
 

man/style_duo.Rd

   header_background_content_padding_top = "7rem",
   header_background_ignore_classes = c("normal", "inverse", "title", "middle", "bottom"),
   text_slide_number_font_size = "0.9rem",
-  text_font_google = google_font("Noto Sans", "400", "400i", "700", "700i"),
-  text_font_family = NULL,
+  text_font_google = NULL,
+  text_font_family = "Noto Sans",
   text_font_weight = "normal",
-  text_font_url = NULL,
+ 
+    text_font_url = "https://fonts.googleapis.com/css?family=Noto+Sans:400,400i,700,700i&display=swap",
  
     text_font_family_fallback = "'Palatino Linotype', 'Book Antiqua', Palatino, 'Microsoft YaHei', 'Songti SC'",
   text_font_base = "serif",
-  header_font_google = google_font("Cabin", "600", "600i"),
-  header_font_family = NULL,
-  header_font_weight = "normal",
-  header_font_url = NULL,
-  code_font_google = google_font("Source Code Pro", "400", "700"),
-  code_font_family = NULL,
+  header_font_google = NULL,
+  header_font_family = "Cabin",
+  header_font_weight = "600",
+ 
+    header_font_url = "https://fonts.googleapis.com/css?family=Cabin:600,600i&display=swap",
+  code_font_google = NULL,
+  code_font_family = "Source Code Pro",
   code_font_size = "0.9rem",
-  code_font_url = NULL,
+ 
+    code_font_url = "https://fonts.googleapis.com/css?family=Source+Code+Pro:400,700&display=swap",
   code_font_family_fallback = "'Lucida Console', Monaco",
   colors = NULL,
   extra_css = NULL,
 
 \item{text_slide_number_font_size}{Slide Number Text Font Size. Defaults to 0.9rem. Modifies the \code{.remark-slide-number} class.}
 
-\item{text_font_google}{Use \code{google_font()} to specify body font. Defaults to \code{google_font("Noto Sans", "400", "400i", "700", "700i")}. Modifies the \code{body} element.}
+\item{text_font_google}{Use \code{google_font()} to specify body font. Defaults to \code{NULL}. Modifies the \code{body} element.}
 
-\item{text_font_family}{Body Text Font Family (xaringan default is \code{'Droid Serif'}). Defaults to \code{NULL}. Modifies the \code{body} element.}
+\item{text_font_family}{Body Text Font Family (xaringan default is \code{'Droid Serif'}). Defaults to Noto Sans. Modifies the \code{body} element.}
 
 \item{text_font_weight}{Body Text Font Weight. Defaults to normal. Modifies the \code{body} element.}
 
-\item{text_font_url}{Body Text Font URL(s). Defaults to \code{NULL}. Modifies the \verb{@import url()} elements.}
+\item{text_font_url}{Body Text Font URL(s). Defaults to https://fonts.googleapis.com/css?family=Noto+Sans:400,400i,700,700i&display=swap. Modifies the \verb{@import url()} elements.}
 
 \item{text_font_family_fallback}{Body Text Font Fallbacks. Defaults to 'Palatino Linotype', 'Book Antiqua', Palatino, 'Microsoft YaHei', 'Songti SC'. Modifies the \code{body} element.}
 
 \item{text_font_base}{Body Text Base Font (Total Failure Fallback). Defaults to serif. Modifies the \code{body} element.}
 
-\item{header_font_google}{Use \code{google_font()} to specify header font. Defaults to \code{google_font("Cabin", "600", "600i")}. Modifies the \code{body} element.}
+\item{header_font_google}{Use \code{google_font()} to specify header font. Defaults to \code{NULL}. Modifies the \code{body} element.}
 
-\item{header_font_family}{Header Font Family (xaringan default is \code{'Yanone Kaffeesatz'}). Defaults to \code{NULL}. Modifies the \verb{h1, h2, h3} elements.}
+\item{header_font_family}{Header Font Family (xaringan default is \code{'Yanone Kaffeesatz'}). Defaults to Cabin. Modifies the \verb{h1, h2, h3} elements.}
 
-\item{header_font_weight}{Header Font Weight. Defaults to normal. Modifies the \verb{h1, h2, h3} elements.}
+\item{header_font_weight}{Header Font Weight. Defaults to 600. Modifies the \verb{h1, h2, h3} elements.}
 
-\item{header_font_url}{Header Font URL. Defaults to \code{NULL}. Modifies the \verb{@import url} elements.}
+\item{header_font_url}{Header Font URL. Defaults to https://fonts.googleapis.com/css?family=Cabin:600,600i&display=swap. Modifies the \verb{@import url} elements.}
 
-\item{code_font_google}{Use \code{google_font()} to specify code font. Defaults to \code{google_font("Source Code Pro", "400", "700")}. Modifies the \code{body} element.}
+\item{code_font_google}{Use \code{google_font()} to specify code font. Defaults to \code{NULL}. Modifies the \code{body} element.}
 
-\item{code_font_family}{Code Font Family. Defaults to \code{NULL}. Modifies the \verb{.remark-code, .remark-inline-code} classes.}
+\item{code_font_family}{Code Font Family. Defaults to Source Code Pro. Modifies the \verb{.remark-code, .remark-inline-code} classes.}
 
 \item{code_font_size}{Code Text Font Size. Defaults to 0.9rem. Modifies the \code{.remark-inline} class.}
 
-\item{code_font_url}{Code Font URL. Defaults to \code{NULL}. Modifies the \verb{@import url} elements.}
+\item{code_font_url}{Code Font URL. Defaults to https://fonts.googleapis.com/css?family=Source+Code+Pro:400,700&display=swap. Modifies the \verb{@import url} elements.}
 
 \item{code_font_family_fallback}{Code Font Fallback. Defaults to 'Lucida Console', Monaco. Modifies the \verb{.remark-code, .remark-inline-code} classes.}
 

man/style_duo_accent.Rd

   header_background_content_padding_top = "7rem",
   header_background_ignore_classes = c("normal", "inverse", "title", "middle", "bottom"),
   text_slide_number_font_size = "0.9rem",
-  text_font_google = google_font("Noto Sans", "400", "400i", "700", "700i"),
-  text_font_family = NULL,
+  text_font_google = NULL,
+  text_font_family = "Noto Sans",
   text_font_weight = "normal",
-  text_font_url = NULL,
+ 
+    text_font_url = "https://fonts.googleapis.com/css?family=Noto+Sans:400,400i,700,700i&display=swap",
  
     text_font_family_fallback = "'Palatino Linotype', 'Book Antiqua', Palatino, 'Microsoft YaHei', 'Songti SC'",
   text_font_base = "serif",
-  header_font_google = google_font("Cabin", "600", "600i"),
-  header_font_family = NULL,
-  header_font_weight = "normal",
-  header_font_url = NULL,
-  code_font_google = google_font("Source Code Pro", "400", "700"),
-  code_font_family = NULL,
+  header_font_google = NULL,
+  header_font_family = "Cabin",
+  header_font_weight = "600",
+ 
+    header_font_url = "https://fonts.googleapis.com/css?family=Cabin:600,600i&display=swap",
+  code_font_google = NULL,
+  code_font_family = "Source Code Pro",
   code_font_size = "0.9rem",
-  code_font_url = NULL,
+ 
+    code_font_url = "https://fonts.googleapis.com/css?family=Source+Code+Pro:400,700&display=swap",
   code_font_family_fallback = "'Lucida Console', Monaco",
   colors = NULL,
   extra_css = NULL,
 
 \item{text_slide_number_font_size}{Slide Number Text Font Size. Defaults to 0.9rem. Modifies the \code{.remark-slide-number} class.}
 
-\item{text_font_google}{Use \code{google_font()} to specify body font. Defaults to \code{google_font("Noto Sans", "400", "400i", "700", "700i")}. Modifies the \code{body} element.}
+\item{text_font_google}{Use \code{google_font()} to specify body font. Defaults to \code{NULL}. Modifies the \code{body} element.}
 
-\item{text_font_family}{Body Text Font Family (xaringan default is \code{'Droid Serif'}). Defaults to \code{NULL}. Modifies the \code{body} element.}
+\item{text_font_family}{Body Text Font Family (xaringan default is \code{'Droid Serif'}). Defaults to Noto Sans. Modifies the \code{body} element.}
 
 \item{text_font_weight}{Body Text Font Weight. Defaults to normal. Modifies the \code{body} element.}
 
-\item{text_font_url}{Body Text Font URL(s). Defaults to \code{NULL}. Modifies the \verb{@import url()} elements.}
+\item{text_font_url}{Body Text Font URL(s). Defaults to https://fonts.googleapis.com/css?family=Noto+Sans:400,400i,700,700i&display=swap. Modifies the \verb{@import url()} elements.}
 
 \item{text_font_family_fallback}{Body Text Font Fallbacks. Defaults to 'Palatino Linotype', 'Book Antiqua', Palatino, 'Microsoft YaHei', 'Songti SC'. Modifies the \code{body} element.}
 
 \item{text_font_base}{Body Text Base Font (Total Failure Fallback). Defaults to serif. Modifies the \code{body} element.}
 
-\item{header_font_google}{Use \code{google_font()} to specify header font. Defaults to \code{google_font("Cabin", "600", "600i")}. Modifies the \code{body} element.}
+\item{header_font_google}{Use \code{google_font()} to specify header font. Defaults to \code{NULL}. Modifies the \code{body} element.}
 
-\item{header_font_family}{Header Font Family (xaringan default is \code{'Yanone Kaffeesatz'}). Defaults to \code{NULL}. Modifies the \verb{h1, h2, h3} elements.}
+\item{header_font_family}{Header Font Family (xaringan default is \code{'Yanone Kaffeesatz'}). Defaults to Cabin. Modifies the \verb{h1, h2, h3} elements.}
 
-\item{header_font_weight}{Header Font Weight. Defaults to normal. Modifies the \verb{h1, h2, h3} elements.}
+\item{header_font_weight}{Header Font Weight. Defaults to 600. Modifies the \verb{h1, h2, h3} elements.}
 
-\item{header_font_url}{Header Font URL. Defaults to \code{NULL}. Modifies the \verb{@import url} elements.}
+\item{header_font_url}{Header Font URL. Defaults to https://fonts.googleapis.com/css?family=Cabin:600,600i&display=swap. Modifies the \verb{@import url} elements.}
 
-\item{code_font_google}{Use \code{google_font()} to specify code font. Defaults to \code{google_font("Source Code Pro", "400", "700")}. Modifies the \code{body} element.}
+\item{code_font_google}{Use \code{google_font()} to specify code font. Defaults to \code{NULL}. Modifies the \code{body} element.}
 
-\item{code_font_family}{Code Font Family. Defaults to \code{NULL}. Modifies the \verb{.remark-code, .remark-inline-code} classes.}
+\item{code_font_family}{Code Font Family. Defaults to Source Code Pro. Modifies the \verb{.remark-code, .remark-inline-code} classes.}
 
 \item{code_font_size}{Code Text Font Size. Defaults to 0.9rem. Modifies the \code{.remark-inline} class.}
 
-\item{code_font_url}{Code Font URL. Defaults to \code{NULL}. Modifies the \verb{@import url} elements.}
+\item{code_font_url}{Code Font URL. Defaults to https://fonts.googleapis.com/css?family=Source+Code+Pro:400,700&display=swap. Modifies the \verb{@import url} elements.}
 
 \item{code_font_family_fallback}{Code Font Fallback. Defaults to 'Lucida Console', Monaco. Modifies the \verb{.remark-code, .remark-inline-code} classes.}
 

man/style_duo_accent_inverse.Rd

   header_background_content_padding_top = "7rem",
   header_background_ignore_classes = c("normal", "inverse", "title", "middle", "bottom"),
   text_slide_number_font_size = "0.9rem",
-  text_font_google = google_font("Noto Sans", "400", "400i", "700", "700i"),
-  text_font_family = NULL,
+  text_font_google = NULL,
+  text_font_family = "Noto Sans",
   text_font_weight = "normal",
-  text_font_url = NULL,
+ 
+    text_font_url = "https://fonts.googleapis.com/css?family=Noto+Sans:400,400i,700,700i&display=swap",
  
     text_font_family_fallback = "'Palatino Linotype', 'Book Antiqua', Palatino, 'Microsoft YaHei', 'Songti SC'",
   text_font_base = "serif",
-  header_font_google = google_font("Cabin", "600", "600i"),
-  header_font_family = NULL,
-  header_font_weight = "normal",
-  header_font_url = NULL,
-  code_font_google = google_font("Source Code Pro", "400", "700"),
-  code_font_family = NULL,
+  header_font_google = NULL,
+  header_font_family = "Cabin",
+  header_font_weight = "600",
+ 
+    header_font_url = "https://fonts.googleapis.com/css?family=Cabin:600,600i&display=swap",
+  code_font_google = NULL,
+  code_font_family = "Source Code Pro",
   code_font_size = "0.9rem",
-  code_font_url = NULL,
+ 
+    code_font_url = "https://fonts.googleapis.com/css?family=Source+Code+Pro:400,700&display=swap",
   code_font_family_fallback = "'Lucida Console', Monaco",
   colors = NULL,
   extra_css = NULL,
 
 \item{text_slide_number_font_size}{Slide Number Text Font Size. Defaults to 0.9rem. Modifies the \code{.remark-slide-number} class.}
 
-\item{text_font_google}{Use \code{google_font()} to specify body font. Defaults to \code{google_font("Noto Sans", "400", "400i", "700", "700i")}. Modifies the \code{body} element.}
+\item{text_font_google}{Use \code{google_font()} to specify body font. Defaults to \code{NULL}. Modifies the \code{body} element.}
 
-\item{text_font_family}{Body Text Font Family (xaringan default is \code{'Droid Serif'}). Defaults to \code{NULL}. Modifies the \code{body} element.}
+\item{text_font_family}{Body Text Font Family (xaringan default is \code{'Droid Serif'}). Defaults to Noto Sans. Modifies the \code{body} element.}
 
 \item{text_font_weight}{Body Text Font Weight. Defaults to normal. Modifies the \code{body} element.}
 
-\item{text_font_url}{Body Text Font URL(s). Defaults to \code{NULL}. Modifies the \verb{@import url()} elements.}
+\item{text_font_url}{Body Text Font URL(s). Defaults to https://fonts.googleapis.com/css?family=Noto+Sans:400,400i,700,700i&display=swap. Modifies the \verb{@import url()} elements.}
 
 \item{text_font_family_fallback}{Body Text Font Fallbacks. Defaults to 'Palatino Linotype', 'Book Antiqua', Palatino, 'Microsoft YaHei', 'Songti SC'. Modifies the \code{body} element.}
 
 \item{text_font_base}{Body Text Base Font (Total Failure Fallback). Defaults to serif. Modifies the \code{body} element.}
 
-\item{header_font_google}{Use \code{google_font()} to specify header font. Defaults to \code{google_font("Cabin", "600", "600i")}. Modifies the \code{body} element.}
+\item{header_font_google}{Use \code{google_font()} to specify header font. Defaults to \code{NULL}. Modifies the \code{body} element.}
 
-\item{header_font_family}{Header Font Family (xaringan default is \code{'Yanone Kaffeesatz'}). Defaults to \code{NULL}. Modifies the \verb{h1, h2, h3} elements.}
+\item{header_font_family}{Header Font Family (xaringan default is \code{'Yanone Kaffeesatz'}). Defaults to Cabin. Modifies the \verb{h1, h2, h3} elements.}
 
-\item{header_font_weight}{Header Font Weight. Defaults to normal. Modifies the \verb{h1, h2, h3} elements.}
+\item{header_font_weight}{Header Font Weight. Defaults to 600. Modifies the \verb{h1, h2, h3} elements.}
 
-\item{header_font_url}{Header Font URL. Defaults to \code{NULL}. Modifies the \verb{@import url} elements.}
+\item{header_font_url}{Header Font URL. Defaults to https://fonts.googleapis.com/css?family=Cabin:600,600i&display=swap. Modifies the \verb{@import url} elements.}
 
-\item{code_font_google}{Use \code{google_font()} to specify code font. Defaults to \code{google_font("Source Code Pro", "400", "700")}. Modifies the \code{body} element.}
+\item{code_font_google}{Use \code{google_font()} to specify code font. Defaults to \code{NULL}. Modifies the \code{body} element.}
 
-\item{code_font_family}{Code Font Family. Defaults to \code{NULL}. Modifies the \verb{.remark-code, .remark-inline-code} classes.}
+\item{code_font_family}{Code Font Family. Defaults to Source Code Pro. Modifies the \verb{.remark-code, .remark-inline-code} classes.}
 
 \item{code_font_size}{Code Text Font Size. Defaults to 0.9rem. Modifies the \code{.remark-inline} class.}
 
-\item{code_font_url}{Code Font URL. Defaults to \code{NULL}. Modifies the \verb{@import url} elements.}
+\item{code_font_url}{Code Font URL. Defaults to https://fonts.googleapis.com/css?family=Source+Code+Pro:400,700&display=swap. Modifies the \verb{@import url} elements.}
 
 \item{code_font_family_fallback}{Code Font Fallback. Defaults to 'Lucida Console', Monaco. Modifies the \verb{.remark-code, .remark-inline-code} classes.}
 

man/style_mono_accent.Rd

   header_background_content_padding_top = "7rem",
   header_background_ignore_classes = c("normal", "inverse", "title", "middle", "bottom"),
   text_slide_number_font_size = "0.9rem",
-  text_font_google = google_font("Noto Sans", "400", "400i", "700", "700i"),
-  text_font_family = NULL,
+  text_font_google = NULL,
+  text_font_family = "Noto Sans",
   text_font_weight = "normal",
-  text_font_url = NULL,
+ 
+    text_font_url = "https://fonts.googleapis.com/css?family=Noto+Sans:400,400i,700,700i&display=swap",
  
     text_font_family_fallback = "'Palatino Linotype', 'Book Antiqua', Palatino, 'Microsoft YaHei', 'Songti SC'",
   text_font_base = "serif",
-  header_font_google = google_font("Cabin", "600", "600i"),
-  header_font_family = NULL,
-  header_font_weight = "normal",
-  header_font_url = NULL,
-  code_font_google = google_font("Source Code Pro", "400", "700"),
-  code_font_family = NULL,
+  header_font_google = NULL,
+  header_font_family = "Cabin",
+  header_font_weight = "600",
+ 
+    header_font_url = "https://fonts.googleapis.com/css?family=Cabin:600,600i&display=swap",
+  code_font_google = NULL,
+  code_font_family = "Source Code Pro",
   code_font_size = "0.9rem",
-  code_font_url = NULL,
+ 
+    code_font_url = "https://fonts.googleapis.com/css?family=Source+Code+Pro:400,700&display=swap",
   code_font_family_fallback = "'Lucida Console', Monaco",
   colors = NULL,
   extra_css = NULL,
 
 \item{text_slide_number_font_size}{Slide Number Text Font Size. Defaults to 0.9rem. Modifies the \code{.remark-slide-number} class.}
 
-\item{text_font_google}{Use \code{google_font()} to specify body font. Defaults to \code{google_font("Noto Sans", "400", "400i", "700", "700i")}. Modifies the \code{body} element.}
+\item{text_font_google}{Use \code{google_font()} to specify body font. Defaults to \code{NULL}. Modifies the \code{body} element.}
 
-\item{text_font_family}{Body Text Font Family (xaringan default is \code{'Droid Serif'}). Defaults to \code{NULL}. Modifies the \code{body} element.}
+\item{text_font_family}{Body Text Font Family (xaringan default is \code{'Droid Serif'}). Defaults to Noto Sans. Modifies the \code{body} element.}
 
 \item{text_font_weight}{Body Text Font Weight. Defaults to normal. Modifies the \code{body} element.}
 
-\item{text_font_url}{Body Text Font URL(s). Defaults to \code{NULL}. Modifies the \verb{@import url()} elements.}
+\item{text_font_url}{Body Text Font URL(s). Defaults to https://fonts.googleapis.com/css?family=Noto+Sans:400,400i,700,700i&display=swap. Modifies the \verb{@import url()} elements.}
 
 \item{text_font_family_fallback}{Body Text Font Fallbacks. Defaults to 'Palatino Linotype', 'Book Antiqua', Palatino, 'Microsoft YaHei', 'Songti SC'. Modifies the \code{body} element.}
 
 \item{text_font_base}{Body Text Base Font (Total Failure Fallback). Defaults to serif. Modifies the \code{body} element.}
 
-\item{header_font_google}{Use \code{google_font()} to specify header font. Defaults to \code{google_font("Cabin", "600", "600i")}. Modifies the \code{body} element.}
+\item{header_font_google}{Use \code{google_font()} to specify header font. Defaults to \code{NULL}. Modifies the \code{body} element.}
 
-\item{header_font_family}{Header Font Family (xaringan default is \code{'Yanone Kaffeesatz'}). Defaults to \code{NULL}. Modifies the \verb{h1, h2, h3} elements.}
+\item{header_font_family}{Header Font Family (xaringan default is \code{'Yanone Kaffeesatz'}). Defaults to Cabin. Modifies the \verb{h1, h2, h3} elements.}
 
-\item{header_font_weight}{Header Font Weight. Defaults to normal. Modifies the \verb{h1, h2, h3} elements.}
+\item{header_font_weight}{Header Font Weight. Defaults to 600. Modifies the \verb{h1, h2, h3} elements.}
 
-\item{header_font_url}{Header Font URL. Defaults to \code{NULL}. Modifies the \verb{@import url} elements.}
+\item{header_font_url}{Header Font URL. Defaults to https://fonts.googleapis.com/css?family=Cabin:600,600i&display=swap. Modifies the \verb{@import url} elements.}
 
-\item{code_font_google}{Use \code{google_font()} to specify code font. Defaults to \code{google_font("Source Code Pro", "400", "700")}. Modifies the \code{body} element.}
+\item{code_font_google}{Use \code{google_font()} to specify code font. Defaults to \code{NULL}. Modifies the \code{body} element.}
 
-\item{code_font_family}{Code Font Family. Defaults to \code{NULL}. Modifies the \verb{.remark-code, .remark-inline-code} classes.}
+\item{code_font_family}{Code Font Family. Defaults to Source Code Pro. Modifies the \verb{.remark-code, .remark-inline-code} classes.}
 
 \item{code_font_size}{Code Text Font Size. Defaults to 0.9rem. Modifies the \code{.remark-inline} class.}
 
-\item{code_font_url}{Code Font URL. Defaults to \code{NULL}. Modifies the \verb{@import url} elements.}
+\item{code_font_url}{Code Font URL. Defaults to https://fonts.googleapis.com/css?family=Source+Code+Pro:400,700&display=swap. Modifies the \verb{@import url} elements.}
 
 \item{code_font_family_fallback}{Code Font Fallback. Defaults to 'Lucida Console', Monaco. Modifies the \verb{.remark-code, .remark-inline-code} classes.}
 

man/style_mono_accent_inverse.Rd

   header_background_content_padding_top = "7rem",
   header_background_ignore_classes = c("normal", "inverse", "title", "middle", "bottom"),
   text_slide_number_font_size = "0.9rem",
-  text_font_google = google_font("Noto Sans", "400", "400i", "700", "700i"),
-  text_font_family = NULL,
+  text_font_google = NULL,
+  text_font_family = "Noto Sans",
   text_font_weight = "normal",
-  text_font_url = NULL,
+ 
+    text_font_url = "https://fonts.googleapis.com/css?family=Noto+Sans:400,400i,700,700i&display=swap",
  
     text_font_family_fallback = "'Palatino Linotype', 'Book Antiqua', Palatino, 'Microsoft YaHei', 'Songti SC'",
   text_font_base = "serif",
-  header_font_google = google_font("Cabin", "600", "600i"),
-  header_font_family = NULL,
-  header_font_weight = "normal",
-  header_font_url = NULL,
-  code_font_google = google_font("Source Code Pro", "400", "700"),
-  code_font_family = NULL,
+  header_font_google = NULL,
+  header_font_family = "Cabin",
+  header_font_weight = "600",
+ 
+    header_font_url = "https://fonts.googleapis.com/css?family=Cabin:600,600i&display=swap",
+  code_font_google = NULL,
+  code_font_family = "Source Code Pro",
   code_font_size = "0.9rem",
-  code_font_url = NULL,
+ 
+    code_font_url = "https://fonts.googleapis.com/css?family=Source+Code+Pro:400,700&display=swap",
   code_font_family_fallback = "'Lucida Console', Monaco",
   colors = NULL,
   extra_css = NULL,
 
 \item{text_slide_number_font_size}{Slide Number Text Font Size. Defaults to 0.9rem. Modifies the \code{.remark-slide-number} class.}
 
-\item{text_font_google}{Use \code{google_font()} to specify body font. Defaults to \code{google_font("Noto Sans", "400", "400i", "700", "700i")}. Modifies the \code{body} element.}
+\item{text_font_google}{Use \code{google_font()} to specify body font. Defaults to \code{NULL}. Modifies the \code{body} element.}
 
-\item{text_font_family}{Body Text Font Family (xaringan default is \code{'Droid Serif'}). Defaults to \code{NULL}. Modifies the \code{body} element.}
+\item{text_font_family}{Body Text Font Family (xaringan default is \code{'Droid Serif'}). Defaults to Noto Sans. Modifies the \code{body} element.}
 
 \item{text_font_weight}{Body Text Font Weight. Defaults to normal. Modifies the \code{body} element.}
 
-\item{text_font_url}{Body Text Font URL(s). Defaults to \code{NULL}. Modifies the \verb{@import url()} elements.}
+\item{text_font_url}{Body Text Font URL(s). Defaults to https://fonts.googleapis.com/css?family=Noto+Sans:400,400i,700,700i&display=swap. Modifies the \verb{@import url()} elements.}
 
 \item{text_font_family_fallback}{Body Text Font Fallbacks. Defaults to 'Palatino Linotype', 'Book Antiqua', Palatino, 'Microsoft YaHei', 'Songti SC'. Modifies the \code{body} element.}
 
 \item{text_font_base}{Body Text Base Font (Total Failure Fallback). Defaults to serif. Modifies the \code{body} element.}
 
-\item{header_font_google}{Use \code{google_font()} to specify header font. Defaults to \code{google_font("Cabin", "600", "600i")}. Modifies the \code{body} element.}
+\item{header_font_google}{Use \code{google_font()} to specify header font. Defaults to \code{NULL}. Modifies the \code{body} element.}
 
-\item{header_font_family}{Header Font Family (xaringan default is \code{'Yanone Kaffeesatz'}). Defaults to \code{NULL}. Modifies the \verb{h1, h2, h3} elements.}
+\item{header_font_family}{Header Font Family (xaringan default is \code{'Yanone Kaffeesatz'}). Defaults to Cabin. Modifies the \verb{h1, h2, h3} elements.}
 
-\item{header_font_weight}{Header Font Weight. Defaults to normal. Modifies the \verb{h1, h2, h3} elements.}
+\item{header_font_weight}{Header Font Weight. Defaults to 600. Modifies the \verb{h1, h2, h3} elements.}
 
-\item{header_font_url}{Header Font URL. Defaults to \code{NULL}. Modifies the \verb{@import url} elements.}
+\item{header_font_url}{Header Font URL. Defaults to https://fonts.googleapis.com/css?family=Cabin:600,600i&display=swap. Modifies the \verb{@import url} elements.}
 
-\item{code_font_google}{Use \code{google_font()} to specify code font. Defaults to \code{google_font("Source Code Pro", "400", "700")}. Modifies the \code{body} element.}
+\item{code_font_google}{Use \code{google_font()} to specify code font. Defaults to \code{NULL}. Modifies the \code{body} element.}
 
-\item{code_font_family}{Code Font Family. Defaults to \code{NULL}. Modifies the \verb{.remark-code, .remark-inline-code} classes.}
+\item{code_font_family}{Code Font Family. Defaults to Source Code Pro. Modifies the \verb{.remark-code, .remark-inline-code} classes.}
 
 \item{code_font_size}{Code Text Font Size. Defaults to 0.9rem. Modifies the \code{.remark-inline} class.}
 
-\item{code_font_url}{Code Font URL. Defaults to \code{NULL}. Modifies the \verb{@import url} elements.}
+\item{code_font_url}{Code Font URL. Defaults to https://fonts.googleapis.com/css?family=Source+Code+Pro:400,700&display=swap. Modifies the \verb{@import url} elements.}
 
 \item{code_font_family_fallback}{Code Font Fallback. Defaults to 'Lucida Console', Monaco. Modifies the \verb{.remark-code, .remark-inline-code} classes.}
 

man/style_mono_dark.Rd

   header_background_content_padding_top = "7rem",
   header_background_ignore_classes = c("normal", "inverse", "title", "middle", "bottom"),
   text_slide_number_font_size = "0.9rem",
-  text_font_google = google_font("Noto Sans", "400", "400i", "700", "700i"),
-  text_font_family = NULL,
+  text_font_google = NULL,
+  text_font_family = "Noto Sans",
   text_font_weight = "normal",
-  text_font_url = NULL,
+ 
+    text_font_url = "https://fonts.googleapis.com/css?family=Noto+Sans:400,400i,700,700i&display=swap",
  
     text_font_family_fallback = "'Palatino Linotype', 'Book Antiqua', Palatino, 'Microsoft YaHei', 'Songti SC'",
   text_font_base = "serif",
-  header_font_google = google_font("Cabin", "600", "600i"),
-  header_font_family = NULL,
-  header_font_weight = "normal",
-  header_font_url = NULL,
-  code_font_google = google_font("Source Code Pro", "400", "700"),
-  code_font_family = NULL,
+  header_font_google = NULL,
+  header_font_family = "Cabin",
+  header_font_weight = "600",
+ 
+    header_font_url = "https://fonts.googleapis.com/css?family=Cabin:600,600i&display=swap",
+  code_font_google = NULL,
+  code_font_family = "Source Code Pro",
   code_font_size = "0.9rem",
-  code_font_url = NULL,
+ 
+    code_font_url = "https://fonts.googleapis.com/css?family=Source+Code+Pro:400,700&display=swap",
   code_font_family_fallback = "'Lucida Console', Monaco",
   colors = NULL,
   extra_css = NULL,
 
 \item{text_slide_number_font_size}{Slide Number Text Font Size. Defaults to 0.9rem. Modifies the \code{.remark-slide-number} class.}
 
-\item{text_font_google}{Use \code{google_font()} to specify body font. Defaults to \code{google_font("Noto Sans", "400", "400i", "700", "700i")}. Modifies the \code{body} element.}
+\item{text_font_google}{Use \code{google_font()} to specify body font. Defaults to \code{NULL}. Modifies the \code{body} element.}
 
-\item{text_font_family}{Body Text Font Family (xaringan default is \code{'Droid Serif'}). Defaults to \code{NULL}. Modifies the \code{body} element.}
+\item{text_font_family}{Body Text Font Family (xaringan default is \code{'Droid Serif'}). Defaults to Noto Sans. Modifies the \code{body} element.}
 
 \item{text_font_weight}{Body Text Font Weight. Defaults to normal. Modifies the \code{body} element.}
 
-\item{text_font_url}{Body Text Font URL(s). Defaults to \code{NULL}. Modifies the \verb{@import url()} elements.}
+\item{text_font_url}{Body Text Font URL(s). Defaults to https://fonts.googleapis.com/css?family=Noto+Sans:400,400i,700,700i&display=swap. Modifies the \verb{@import url()} elements.}
 
 \item{text_font_family_fallback}{Body Text Font Fallbacks. Defaults to 'Palatino Linotype', 'Book Antiqua', Palatino, 'Microsoft YaHei', 'Songti SC'. Modifies the \code{body} element.}
 
 \item{text_font_base}{Body Text Base Font (Total Failure Fallback). Defaults to serif. Modifies the \code{body} element.}
 
-\item{header_font_google}{Use \code{google_font()} to specify header font. Defaults to \code{google_font("Cabin", "600", "600i")}. Modifies the \code{body} element.}
+\item{header_font_google}{Use \code{google_font()} to specify header font. Defaults to \code{NULL}. Modifies the \code{body} element.}
 
-\item{header_font_family}{Header Font Family (xaringan default is \code{'Yanone Kaffeesatz'}). Defaults to \code{NULL}. Modifies the \verb{h1, h2, h3} elements.}
+\item{header_font_family}{Header Font Family (xaringan default is \code{'Yanone Kaffeesatz'}). Defaults to Cabin. Modifies the \verb{h1, h2, h3} elements.}
 
-\item{header_font_weight}{Header Font Weight. Defaults to normal. Modifies the \verb{h1, h2, h3} elements.}
+\item{header_font_weight}{Header Font Weight. Defaults to 600. Modifies the \verb{h1, h2, h3} elements.}
 
-\item{header_font_url}{Header Font URL. Defaults to \code{NULL}. Modifies the \verb{@import url} elements.}
+\item{header_font_url}{Header Font URL. Defaults to https://fonts.googleapis.com/css?family=Cabin:600,600i&display=swap. Modifies the \verb{@import url} elements.}
 
-\item{code_font_google}{Use \code{google_font()} to specify code font. Defaults to \code{google_font("Source Code Pro", "400", "700")}. Modifies the \code{body} element.}
+\item{code_font_google}{Use \code{google_font()} to specify code font. Defaults to \code{NULL}. Modifies the \code{body} element.}
 
-\item{code_font_family}{Code Font Family. Defaults to \code{NULL}. Modifies the \verb{.remark-code, .remark-inline-code} classes.}
+\item{code_font_family}{Code Font Family. Defaults to Source Code Pro. Modifies the \verb{.remark-code, .remark-inline-code} classes.}
 
 \item{code_font_size}{Code Text Font Size. Defaults to 0.9rem. Modifies the \code{.remark-inline} class.}
 
-\item{code_font_url}{Code Font URL. Defaults to \code{NULL}. Modifies the \verb{@import url} elements.}
+\item{code_font_url}{Code Font URL. Defaults to https://fonts.googleapis.com/css?family=Source+Code+Pro:400,700&display=swap. Modifies the \verb{@import url} elements.}
 
 \item{code_font_family_fallback}{Code Font Fallback. Defaults to 'Lucida Console', Monaco. Modifies the \verb{.remark-code, .remark-inline-code} classes.}
 

man/style_mono_light.Rd

   header_background_content_padding_top = "7rem",
   header_background_ignore_classes = c("normal", "inverse", "title", "middle", "bottom"),
   text_slide_number_font_size = "0.9rem",
-  text_font_google = google_font("Noto Sans", "400", "400i", "700", "700i"),
-  text_font_family = NULL,
+  text_font_google = NULL,
+  text_font_family = "Noto Sans",
   text_font_weight = "normal",
-  text_font_url = NULL,
+ 
+    text_font_url = "https://fonts.googleapis.com/css?family=Noto+Sans:400,400i,700,700i&display=swap",
  
     text_font_family_fallback = "'Palatino Linotype', 'Book Antiqua', Palatino, 'Microsoft YaHei', 'Songti SC'",
   text_font_base = "serif",
-  header_font_google = google_font("Cabin", "600", "600i"),
-  header_font_family = NULL,
-  header_font_weight = "normal",
-  header_font_url = NULL,
-  code_font_google = google_font("Source Code Pro", "400", "700"),
-  code_font_family = NULL,
+  header_font_google = NULL,
+  header_font_family = "Cabin",
+  header_font_weight = "600",
+ 
+    header_font_url = "https://fonts.googleapis.com/css?family=Cabin:600,600i&display=swap",
+  code_font_google = NULL,
+  code_font_family = "Source Code Pro",
   code_font_size = "0.9rem",
-  code_font_url = NULL,
+ 
+    code_font_url = "https://fonts.googleapis.com/css?family=Source+Code+Pro:400,700&display=swap",
   code_font_family_fallback = "'Lucida Console', Monaco",
   colors = NULL,
   extra_css = NULL,
 
 \item{text_slide_number_font_size}{Slide Number Text Font Size. Defaults to 0.9rem. Modifies the \code{.remark-slide-number} class.}
 
-\item{text_font_google}{Use \code{google_font()} to specify body font. Defaults to \code{google_font("Noto Sans", "400", "400i", "700", "700i")}. Modifies the \code{body} element.}
+\item{text_font_google}{Use \code{google_font()} to specify body font. Defaults to \code{NULL}. Modifies the \code{body} element.}
 
-\item{text_font_family}{Body Text Font Family (xaringan default is \code{'Droid Serif'}). Defaults to \code{NULL}. Modifies the \code{body} element.}
+\item{text_font_family}{Body Text Font Family (xaringan default is \code{'Droid Serif'}). Defaults to Noto Sans. Modifies the \code{body} element.}
 
 \item{text_font_weight}{Body Text Font Weight. Defaults to normal. Modifies the \code{body} element.}
 
-\item{text_font_url}{Body Text Font URL(s). Defaults to \code{NULL}. Modifies the \verb{@import url()} elements.}
+\item{text_font_url}{Body Text Font URL(s). Defaults to https://fonts.googleapis.com/css?family=Noto+Sans:400,400i,700,700i&display=swap. Modifies the \verb{@import url()} elements.}
 
 \item{text_font_family_fallback}{Body Text Font Fallbacks. Defaults to 'Palatino Linotype', 'Book Antiqua', Palatino, 'Microsoft YaHei', 'Songti SC'. Modifies the \code{body} element.}
 
 \item{text_font_base}{Body Text Base Font (Total Failure Fallback). Defaults to serif. Modifies the \code{body} element.}
 
-\item{header_font_google}{Use \code{google_font()} to specify header font. Defaults to \code{google_font("Cabin", "600", "600i")}. Modifies the \code{body} element.}
+\item{header_font_google}{Use \code{google_font()} to specify header font. Defaults to \code{NULL}. Modifies the \code{body} element.}
 
-\item{header_font_family}{Header Font Family (xaringan default is \code{'Yanone Kaffeesatz'}). Defaults to \code{NULL}. Modifies the \verb{h1, h2, h3} elements.}
+\item{header_font_family}{Header Font Family (xaringan default is \code{'Yanone Kaffeesatz'}). Defaults to Cabin. Modifies the \verb{h1, h2, h3} elements.}
 
-\item{header_font_weight}{Header Font Weight. Defaults to normal. Modifies the \verb{h1, h2, h3} elements.}
+\item{header_font_weight}{Header Font Weight. Defaults to 600. Modifies the \verb{h1, h2, h3} elements.}
 
-\item{header_font_url}{Header Font URL. Defaults to \code{NULL}. Modifies the \verb{@import url} elements.}
+\item{header_font_url}{Header Font URL. Defaults to https://fonts.googleapis.com/css?family=Cabin:600,600i&display=swap. Modifies the \verb{@import url} elements.}
 
-\item{code_font_google}{Use \code{google_font()} to specify code font. Defaults to \code{google_font("Source Code Pro", "400", "700")}. Modifies the \code{body} element.}
+\item{code_font_google}{Use \code{google_font()} to specify code font. Defaults to \code{NULL}. Modifies the \code{body} element.}
 
-\item{code_font_family}{Code Font Family. Defaults to \code{NULL}. Modifies the \verb{.remark-code, .remark-inline-code} classes.}
+\item{code_font_family}{Code Font Family. Defaults to Source Code Pro. Modifies the \verb{.remark-code, .remark-inline-code} classes.}
 
 \item{code_font_size}{Code Text Font Size. Defaults to 0.9rem. Modifies the \code{.remark-inline} class.}
 
-\item{code_font_url}{Code Font URL. Defaults to \code{NULL}. Modifies the \verb{@import url} elements.}
+\item{code_font_url}{Code Font URL. Defaults to https://fonts.googleapis.com/css?family=Source+Code+Pro:400,700&display=swap. Modifies the \verb{@import url} elements.}
 
 \item{code_font_family_fallback}{Code Font Fallback. Defaults to 'Lucida Console', Monaco. Modifies the \verb{.remark-code, .remark-inline-code} classes.}
 

man/style_solarized_dark.Rd

   header_background_content_padding_top = "7rem",
   header_background_ignore_classes = c("normal", "inverse", "title", "middle", "bottom"),
   text_slide_number_font_size = "0.9rem",
-  text_font_google = google_font("Noto Sans", "400", "400i", "700", "700i"),
-  text_font_family = NULL,
+  text_font_google = NULL,
+  text_font_family = "Noto Sans",
   text_font_weight = "normal",
-  text_font_url = NULL,
+ 
+    text_font_url = "https://fonts.googleapis.com/css?family=Noto+Sans:400,400i,700,700i&display=swap",
  
     text_font_family_fallback = "'Palatino Linotype', 'Book Antiqua', Palatino, 'Microsoft YaHei', 'Songti SC'",
   text_font_base = "serif",
-  header_font_google = google_font("Cabin", "600", "600i"),
-  header_font_family = NULL,
-  header_font_weight = "normal",
-  header_font_url = NULL,
-  code_font_google = google_font("Source Code Pro", "400", "700"),
-  code_font_family = NULL,
+  header_font_google = NULL,
+  header_font_family = "Cabin",
+  header_font_weight = "600",
+ 
+    header_font_url = "https://fonts.googleapis.com/css?family=Cabin:600,600i&display=swap",
+  code_font_google = NULL,
+  code_font_family = "Source Code Pro",
   code_font_size = "0.9rem",
-  code_font_url = NULL,
+ 
+    code_font_url = "https://fonts.googleapis.com/css?family=Source+Code+Pro:400,700&display=swap",
   code_font_family_fallback = "'Lucida Console', Monaco",
   colors = NULL,
   extra_css = NULL,
 
 \item{text_slide_number_font_size}{Slide Number Text Font Size. Defaults to 0.9rem. Modifies the \code{.remark-slide-number} class.}
 
-\item{text_font_google}{Use \code{google_font()} to specify body font. Defaults to \code{google_font("Noto Sans", "400", "400i", "700", "700i")}. Modifies the \code{body} element.}
+\item{text_font_google}{Use \code{google_font()} to specify body font. Defaults to \code{NULL}. Modifies the \code{body} element.}
 
-\item{text_font_family}{Body Text Font Family (xaringan default is \code{'Droid Serif'}). Defaults to \code{NULL}. Modifies the \code{body} element.}
+\item{text_font_family}{Body Text Font Family (xaringan default is \code{'Droid Serif'}). Defaults to Noto Sans. Modifies the \code{body} element.}
 
 \item{text_font_weight}{Body Text Font Weight. Defaults to normal. Modifies the \code{body} element.}
 
-\item{text_font_url}{Body Text Font URL(s). Defaults to \code{NULL}. Modifies the \verb{@import url()} elements.}
+\item{text_font_url}{Body Text Font URL(s). Defaults to https://fonts.googleapis.com/css?family=Noto+Sans:400,400i,700,700i&display=swap. Modifies the \verb{@import url()} elements.}
 
 \item{text_font_family_fallback}{Body Text Font Fallbacks. Defaults to 'Palatino Linotype', 'Book Antiqua', Palatino, 'Microsoft YaHei', 'Songti SC'. Modifies the \code{body} element.}
 
 \item{text_font_base}{Body Text Base Font (Total Failure Fallback). Defaults to serif. Modifies the \code{body} element.}
 
-\item{header_font_google}{Use \code{google_font()} to specify header font. Defaults to \code{google_font("Cabin", "600", "600i")}. Modifies the \code{body} element.}
+\item{header_font_google}{Use \code{google_font()} to specify header font. Defaults to \code{NULL}. Modifies the \code{body} element.}
 
-\item{header_font_family}{Header Font Family (xaringan default is \code{'Yanone Kaffeesatz'}). Defaults to \code{NULL}. Modifies the \verb{h1, h2, h3} elements.}
+\item{header_font_family}{Header Font Family (xaringan default is \code{'Yanone Kaffeesatz'}). Defaults to Cabin. Modifies the \verb{h1, h2, h3} elements.}
 
-\item{header_font_weight}{Header Font Weight. Defaults to normal. Modifies the \verb{h1, h2, h3} elements.}
+\item{header_font_weight}{Header Font Weight. Defaults to 600. Modifies the \verb{h1, h2, h3} elements.}
 
-\item{header_font_url}{Header Font URL. Defaults to \code{NULL}. Modifies the \verb{@import url} elements.}
+\item{header_font_url}{Header Font URL. Defaults to https://fonts.googleapis.com/css?family=Cabin:600,600i&display=swap. Modifies the \verb{@import url} elements.}
 
-\item{code_font_google}{Use \code{google_font()} to specify code font. Defaults to \code{google_font("Source Code Pro", "400", "700")}. Modifies the \code{body} element.}
+\item{code_font_google}{Use \code{google_font()} to specify code font. Defaults to \code{NULL}. Modifies the \code{body} element.}
 
-\item{code_font_family}{Code Font Family. Defaults to \code{NULL}. Modifies the \verb{.remark-code, .remark-inline-code} classes.}
+\item{code_font_family}{Code Font Family. Defaults to Source Code Pro. Modifies the \verb{.remark-code, .remark-inline-code} classes.}
 
 \item{code_font_size}{Code Text Font Size. Defaults to 0.9rem. Modifies the \code{.remark-inline} class.}
 
-\item{code_font_url}{Code Font URL. Defaults to \code{NULL}. Modifies the \verb{@import url} elements.}
+\item{code_font_url}{Code Font URL. Defaults to https://fonts.googleapis.com/css?family=Source+Code+Pro:400,700&display=swap. Modifies the \verb{@import url} elements.}
 
 \item{code_font_family_fallback}{Code Font Fallback. Defaults to 'Lucida Console', Monaco. Modifies the \verb{.remark-code, .remark-inline-code} classes.}
 

man/style_solarized_light.Rd

   header_background_content_padding_top = "7rem",
   header_background_ignore_classes = c("normal", "inverse", "title", "middle", "bottom"),
   text_slide_number_font_size = "0.9rem",
-  text_font_google = google_font("Noto Sans", "400", "400i", "700", "700i"),
-  text_font_family = NULL,
+  text_font_google = NULL,
+  text_font_family = "Noto Sans",
   text_font_weight = "normal",
-  text_font_url = NULL,
+ 
+    text_font_url = "https://fonts.googleapis.com/css?family=Noto+Sans:400,400i,700,700i&display=swap",
  
     text_font_family_fallback = "'Palatino Linotype', 'Book Antiqua', Palatino, 'Microsoft YaHei', 'Songti SC'",
   text_font_base = "serif",
-  header_font_google = google_font("Cabin", "600", "600i"),
-  header_font_family = NULL,
-  header_font_weight = "normal",
-  header_font_url = NULL,
-  code_font_google = google_font("Source Code Pro", "400", "700"),
-  code_font_family = NULL,
+  header_font_google = NULL,
+  header_font_family = "Cabin",
+  header_font_weight = "600",
+ 
+    header_font_url = "https://fonts.googleapis.com/css?family=Cabin:600,600i&display=swap",
+  code_font_google = NULL,
+  code_font_family = "Source Code Pro",
   code_font_size = "0.9rem",
-  code_font_url = NULL,
+ 
+    code_font_url = "https://fonts.googleapis.com/css?family=Source+Code+Pro:400,700&display=swap",
   code_font_family_fallback = "'Lucida Console', Monaco",
   colors = NULL,
   extra_css = NULL,
 
 \item{text_slide_number_font_size}{Slide Number Text Font Size. Defaults to 0.9rem. Modifies the \code{.remark-slide-number} class.}
 
-\item{text_font_google}{Use \code{google_font()} to specify body font. Defaults to \code{google_font("Noto Sans", "400", "400i", "700", "700i")}. Modifies the \code{body} element.}
+\item{text_font_google}{Use \code{google_font()} to specify body font. Defaults to \code{NULL}. Modifies the \code{body} element.}
 
-\item{text_font_family}{Body Text Font Family (xaringan default is \code{'Droid Serif'}). Defaults to \code{NULL}. Modifies the \code{body} element.}
+\item{text_font_family}{Body Text Font Family (xaringan default is \code{'Droid Serif'}). Defaults to Noto Sans. Modifies the \code{body} element.}
 
 \item{text_font_weight}{Body Text Font Weight. Defaults to normal. Modifies the \code{body} element.}
 
-\item{text_font_url}{Body Text Font URL(s). Defaults to \code{NULL}. Modifies the \verb{@import url()} elements.}
+\item{text_font_url}{Body Text Font URL(s). Defaults to https://fonts.googleapis.com/css?family=Noto+Sans:400,400i,700,700i&display=swap. Modifies the \verb{@import url()} elements.}
 
 \item{text_font_family_fallback}{Body Text Font Fallbacks. Defaults to 'Palatino Linotype', 'Book Antiqua', Palatino, 'Microsoft YaHei', 'Songti SC'. Modifies the \code{body} element.}
 
 \item{text_font_base}{Body Text Base Font (Total Failure Fallback). Defaults to serif. Modifies the \code{body} element.}
 
-\item{header_font_google}{Use \code{google_font()} to specify header font. Defaults to \code{google_font("Cabin", "600", "600i")}. Modifies the \code{body} element.}
+\item{header_font_google}{Use \code{google_font()} to specify header font. Defaults to \code{NULL}. Modifies the \code{body} element.}
 
-\item{header_font_family}{Header Font Family (xaringan default is \code{'Yanone Kaffeesatz'}). Defaults to \code{NULL}. Modifies the \verb{h1, h2, h3} elements.}
+\item{header_font_family}{Header Font Family (xaringan default is \code{'Yanone Kaffeesatz'}). Defaults to Cabin. Modifies the \verb{h1, h2, h3} elements.}
 
-\item{header_font_weight}{Header Font Weight. Defaults to normal. Modifies the \verb{h1, h2, h3} elements.}
+\item{header_font_weight}{Header Font Weight. Defaults to 600. Modifies the \verb{h1, h2, h3} elements.}
 
-\item{header_font_url}{Header Font URL. Defaults to \code{NULL}. Modifies the \verb{@import url} elements.}
+\item{header_font_url}{Header Font URL. Defaults to https://fonts.googleapis.com/css?family=Cabin:600,600i&display=swap. Modifies the \verb{@import url} elements.}
 
-\item{code_font_google}{Use \code{google_font()} to specify code font. Defaults to \code{google_font("Source Code Pro", "400", "700")}. Modifies the \code{body} element.}
+\item{code_font_google}{Use \code{google_font()} to specify code font. Defaults to \code{NULL}. Modifies the \code{body} element.}
 
-\item{code_font_family}{Code Font Family. Defaults to \code{NULL}. Modifies the \verb{.remark-code, .remark-inline-code} classes.}
+\item{code_font_family}{Code Font Family. Defaults to Source Code Pro. Modifies the \verb{.remark-code, .remark-inline-code} classes.}
 
 \item{code_font_size}{Code Text Font Size. Defaults to 0.9rem. Modifies the \code{.remark-inline} class.}
 
-\item{code_font_url}{Code Font URL. Defaults to \code{NULL}. Modifies the \verb{@import url} elements.}
+\item{code_font_url}{Code Font URL. Defaults to https://fonts.googleapis.com/css?family=Source+Code+Pro:400,700&display=swap. Modifies the \verb{@import url} elements.}
 
 \item{code_font_family_fallback}{Code Font Fallback. Defaults to 'Lucida Console', Monaco. Modifies the \verb{.remark-code, .remark-inline-code} classes.}
 

man/style_xaringan.Rd

   header_background_content_padding_top = "7rem",
   header_background_ignore_classes = c("normal", "inverse", "title", "middle", "bottom"),
   text_slide_number_font_size = "0.9rem",
-  text_font_google = google_font("Noto Sans", "400", "400i", "700", "700i"),
-  text_font_family = NULL,
+  text_font_google = NULL,
+  text_font_family = "Noto Sans",
   text_font_weight = "normal",
-  text_font_url = NULL,
+ 
+    text_font_url = "https://fonts.googleapis.com/css?family=Noto+Sans:400,400i,700,700i&display=swap",
  
     text_font_family_fallback = "'Palatino Linotype', 'Book Antiqua', Palatino, 'Microsoft YaHei', 'Songti SC'",
   text_font_base = "serif",
-  header_font_google = google_font("Cabin", "600", "600i"),
-  header_font_family = NULL,
-  header_font_weight = "normal",
-  header_font_url = NULL,
-  code_font_google = google_font("Source Code Pro", "400", "700"),
-  code_font_family = NULL,
+  header_font_google = NULL,
+  header_font_family = "Cabin",
+  header_font_weight = "600",
+ 
+    header_font_url = "https://fonts.googleapis.com/css?family=Cabin:600,600i&display=swap",
+  code_font_google = NULL,
+  code_font_family = "Source Code Pro",
   code_font_size = "0.9rem",
-  code_font_url = NULL,
+ 
+    code_font_url = "https://fonts.googleapis.com/css?family=Source+Code+Pro:400,700&display=swap",
   code_font_family_fallback = "'Lucida Console', Monaco",
   colors = NULL,
   extra_css = NULL,
 
 \item{text_slide_number_font_size}{Slide Number Text Font Size. Defaults to 0.9rem. Modifies the \code{.remark-slide-number} class.}
 
-\item{text_font_google}{Use \code{google_font()} to specify body font. Defaults to \code{google_font("Noto Sans", "400", "400i", "700", "700i")}. Modifies the \code{body} element.}
+\item{text_font_google}{Use \code{google_font()} to specify body font. Defaults to \code{NULL}. Modifies the \code{body} element.}
 
-\item{text_font_family}{Body Text Font Family (xaringan default is \code{'Droid Serif'}). Defaults to \code{NULL}. Modifies the \code{body} element.}
+\item{text_font_family}{Body Text Font Family (xaringan default is \code{'Droid Serif'}). Defaults to Noto Sans. Modifies the \code{body} element.}
 
 \item{text_font_weight}{Body Text Font Weight. Defaults to normal. Modifies the \code{body} element.}
 
-\item{text_font_url}{Body Text Font URL(s). Defaults to \code{NULL}. Modifies the \verb{@import url()} elements.}
+\item{text_font_url}{Body Text Font URL(s). Defaults to https://fonts.googleapis.com/css?family=Noto+Sans:400,400i,700,700i&display=swap. Modifies the \verb{@import url()} elements.}
 
 \item{text_font_family_fallback}{Body Text Font Fallbacks. Defaults to 'Palatino Linotype', 'Book Antiqua', Palatino, 'Microsoft YaHei', 'Songti SC'. Modifies the \code{body} element.}
 
 \item{text_font_base}{Body Text Base Font (Total Failure Fallback). Defaults to serif. Modifies the \code{body} element.}
 
-\item{header_font_google}{Use \code{google_font()} to specify header font. Defaults to \code{google_font("Cabin", "600", "600i")}. Modifies the \code{body} element.}
+\item{header_font_google}{Use \code{google_font()} to specify header font. Defaults to \code{NULL}. Modifies the \code{body} element.}
 
-\item{header_font_family}{Header Font Family (xaringan default is \code{'Yanone Kaffeesatz'}). Defaults to \code{NULL}. Modifies the \verb{h1, h2, h3} elements.}
+\item{header_font_family}{Header Font Family (xaringan default is \code{'Yanone Kaffeesatz'}). Defaults to Cabin. Modifies the \verb{h1, h2, h3} elements.}
 
-\item{header_font_weight}{Header Font Weight. Defaults to normal. Modifies the \verb{h1, h2, h3} elements.}
+\item{header_font_weight}{Header Font Weight. Defaults to 600. Modifies the \verb{h1, h2, h3} elements.}
 
-\item{header_font_url}{Header Font URL. Defaults to \code{NULL}. Modifies the \verb{@import url} elements.}
+\item{header_font_url}{Header Font URL. Defaults to https://fonts.googleapis.com/css?family=Cabin:600,600i&display=swap. Modifies the \verb{@import url} elements.}
 
-\item{code_font_google}{Use \code{google_font()} to specify code font. Defaults to \code{google_font("Source Code Pro", "400", "700")}. Modifies the \code{body} element.}
+\item{code_font_google}{Use \code{google_font()} to specify code font. Defaults to \code{NULL}. Modifies the \code{body} element.}
 
-\item{code_font_family}{Code Font Family. Defaults to \code{NULL}. Modifies the \verb{.remark-code, .remark-inline-code} classes.}
+\item{code_font_family}{Code Font Family. Defaults to Source Code Pro. Modifies the \verb{.remark-code, .remark-inline-code} classes.}
 
 \item{code_font_size}{Code Text Font Size. Defaults to 0.9rem. Modifies the \code{.remark-inline} class.}
 
-\item{code_font_url}{Code Font URL. Defaults to \code{NULL}. Modifies the \verb{@import url} elements.}
+\item{code_font_url}{Code Font URL. Defaults to https://fonts.googleapis.com/css?family=Source+Code+Pro:400,700&display=swap. Modifies the \verb{@import url} elements.}
 
 \item{code_font_family_fallback}{Code Font Fallback. Defaults to 'Lucida Console', Monaco. Modifies the \verb{.remark-code, .remark-inline-code} classes.}
 

tests/testthat/css/duo-header_bg.css

 }
 h1, h2, h3 {
   font-family: var(--header-font-family);
-  font-weight: normal;
+  font-weight: 600;
   color: var(--header-color);
 }
 .remark-slide-content {

tests/testthat/css/duo.css

 }
 h1, h2, h3 {
   font-family: var(--header-font-family);
-  font-weight: normal;
+  font-weight: 600;
   color: var(--header-color);
 }
 .remark-slide-content {

tests/testthat/css/duo_accent.css

 }
 h1, h2, h3 {
   font-family: var(--header-font-family);
-  font-weight: normal;
+  font-weight: 600;
   color: var(--header-color);
 }
 .remark-slide-content {

tests/testthat/css/duo_accent_inverse.css

 }
 h1, h2, h3 {
   font-family: var(--header-font-family);
-  font-weight: normal;
+  font-weight: 600;
   color: var(--header-color);
 }
 .remark-slide-content {

tests/testthat/css/mono_accent.css

 }
 h1, h2, h3 {
   font-family: var(--header-font-family);
-  font-weight: normal;
+  font-weight: 600;
   color: var(--header-color);
 }
 .remark-slide-content {

tests/testthat/css/mono_accent_inverse.css

 }
 h1, h2, h3 {
   font-family: var(--header-font-family);
-  font-weight: normal;
+  font-weight: 600;
   color: var(--header-color);
 }
 .remark-slide-content {

tests/testthat/css/mono_dark.css

 }
 h1, h2, h3 {
   font-family: var(--header-font-family);
-  font-weight: normal;
+  font-weight: 600;
   color: var(--header-color);
 }
 .remark-slide-content {

tests/testthat/css/mono_light-header_bg.css

 }
 h1, h2, h3 {
   font-family: var(--header-font-family);
-  font-weight: normal;
+  font-weight: 600;
   color: var(--header-color);
 }
 .remark-slide-content {

tests/testthat/css/mono_light.css

 }
 h1, h2, h3 {
   font-family: var(--header-font-family);
-  font-weight: normal;
+  font-weight: 600;
   color: var(--header-color);
 }
 .remark-slide-content {

tests/testthat/css/solarized_dark-header_bg.css

 }
 h1, h2, h3 {
   font-family: var(--header-font-family);
-  font-weight: normal;
+  font-weight: 600;
   color: var(--header-color);
 }
 .remark-slide-content {

tests/testthat/css/solarized_dark.css

 }
 h1, h2, h3 {
   font-family: var(--header-font-family);
-  font-weight: normal;
+  font-weight: 600;
   color: var(--header-color);
 }
 .remark-slide-content {

tests/testthat/css/solarized_light.css

 }
 h1, h2, h3 {
   font-family: var(--header-font-family);
-  font-weight: normal;
+  font-weight: 600;
   color: var(--header-color);
 }
 .remark-slide-content {

tests/testthat/css/xaringan.css

 }
 h1, h2, h3 {
   font-family: var(--header-font-family);
-  font-weight: normal;
+  font-weight: 600;
   color: var(--header-color);
 }
 .remark-slide-content {

tests/testthat/helper-session.R

+with_clean_session <- function(.f, args = list()) {
+  empty_wd <- tempfile()
+  dir.create(empty_wd)
+  owd <- setwd(empty_wd)
+  message(owd)
+  on.exit({message(owd); setwd(owd); unlink(empty_wd, TRUE)})
+  callr::r_safe(.f, args)
+}

tests/testthat/test-themes.R

 test_that("style colors are added to themes", {
   test_theme_file("xaringan", colors = c('light-blue' = "#bad4ed"))
 })
+
+test_that("setting individual font overrides google font", {
+  theme_vars <- with_clean_session(function() {
+    xf <- xaringanthemer::style_xaringan(
+      text_font_family = "Damogran",
+      header_font_family = "Magrathea"
+    )
+    xaringanthemer:::read_css_vars(xf)
+  })
+
+  expect_equal(theme_vars$text_font_family, "Damogran")
+  expect_false(theme_vars$text_font_is_google)
+  expect_equal(theme_vars$header_font_family, "Magrathea")
+  expect_false(theme_vars$header_font_is_google)
+})
+
+test_that("default fonts are correctly identified as google font", {
+  theme_vars <- with_clean_session(function() {
+    xf <- xaringanthemer::style_xaringan()
+    xaringanthemer:::read_css_vars(xf)
+  })
+
+  expect_equal(theme_vars$text_font_family, quote_elements_w_spaces(formals(style_xaringan)$text_font_family))
+  expect_true(theme_vars$text_font_is_google)
+  expect_equal(theme_vars$header_font_family, quote_elements_w_spaces(formals(style_xaringan)$header_font_family))
+  expect_true(theme_vars$header_font_is_google)
+})