www/style_Rmd.css: add red_pencadre

www/style_Rmd.css

-html, body {
+html,
+body {
   font-size: 20px;
 }
 
@@ -6,7 +7,19 @@ html, body {
   border: 4px;
   border-style: solid;
   border-color: #034b6f;
-  background-color: #EEF3F9; 
+  background-color: #eef3f9;
+  padding: 1em;
+  text-align: left;
+  border-radius: 5px 4px 3px 2px;
+  font-weight: 300;
+  font-size: 22px;
+}
+
+.red_pencadre {
+  border: 4px;
+  border-style: solid;
+  border-color: #d53600;
+  background-color: #f9e9e7;
   padding: 1em;
   text-align: left;
   border-radius: 5px 4px 3px 2px;
@@ -15,29 +28,32 @@ html, body {
 }
 
 @font-face {
-    font-family: 'Yanone Kaffeesatz';
+  font-family: "Yanone Kaffeesatz";
   src: url("../www/YanoneKaffeesatz-Bold.ttf");
 }
 @font-face {
-    font-family: 'Raleway';
+  font-family: "Raleway";
   src: url("../www/Raleway-Regular.ttf");
 }
 
-@import url('https://fonts.googleapis.com/css2?family=Yanone+Kaffeesatz&display=swap');
-@import url('https://fonts.googleapis.com/css2?family=Raleway&display=swap');
+@import url("https://fonts.googleapis.com/css2?family=Yanone+Kaffeesatz&display=swap");
+@import url("https://fonts.googleapis.com/css2?family=Raleway&display=swap");
 
-h3 { /* Header 3 */
-  font-family: 'Yanone Kaffeesatz', sans-serif;
+h3 {
+  /* Header 3 */
+  font-family: "Yanone Kaffeesatz", sans-serif;
   color: #034b6f;
 }
 
-h2 { /* Header 2 */
-  font-family: 'Yanone Kaffeesatz', sans-serif;
+h2 {
+  /* Header 2 */
+  font-family: "Yanone Kaffeesatz", sans-serif;
   color: #034b6f;
 }
 
-h1 { /* Header 1 */
-  font-family: 'Yanone Kaffeesatz', sans-serif;
+h1 {
+  /* Header 1 */
+  font-family: "Yanone Kaffeesatz", sans-serif;
   color: #034b6f;
 }
 
@@ -61,7 +77,7 @@ legend{
 
 details summary {
   padding: 1em;
-  font-family: 'Yanone Kaffeesatz', sans-serif;
+  font-family: "Yanone Kaffeesatz", sans-serif;
   font-size: 26px;
   color: #034b6f;
   text-align: center;