add: style.css : transformation de l'image d'arriere plan en generation par le client + debut de stylisation des differentes categories de balises et elements

styles/style.css

@@ -1,5 +1,29 @@
 body {
-  background-image: url('../images/fond_minimaliste.png');
-  background-size: cover;
-  background-repeat: repeat-y;  
+  background-color: #ffffff;
+  background-image: radial-gradient(circle, #d0d0d5 1.5px, transparent 1px);
+  background-size: 50px 50px;
+  background-repeat: repeat;  
+}
+
+header {
+  background-color: #ffffff;
+}
+
+#top-nav {
+  background-color: #ffffff;
+}
+
+div {
+  background-color: white;
+  transition: box-shadow 0.3s ease;
+}
+
+div:hover{
+  background-color: white;
+  box-shadow: 0px 0px 24px rgba(0, 0, 0, 0.3);
+}
+
+footer {
+  background-color: #333333;
+  color: #eeeeee;
 }