added globalStyle sheet

Author: Hannah Dunsmore

src/Components/MissionManifest/MissionManifest.scss

@@ -1,14 +1,15 @@
 @use "../../App.scss" as AppCSS;
-@import url('https://fonts.googleapis.com/css2?family=Martian+Mono:wght@100..800&display=swap');
+@import "../../Styles/GlobalStyles.scss";
 
 body{
-    background-color: #062356;
+    background-color: $blueBackground;
 }
 #mission-manifest-container {
-    font-family: "Martian Mono", monospace;
+    font-family: $MartianMono;
     width: 40vw;
     margin: 40px auto;
-    background-color: #E4965B;
+    background-color: $orangeBackground;
+    color: black;
     h2 {
         font-weight: 900;
     }

src/Styles/GlobalStyles.scss

@@ -0,0 +1,14 @@
+
+@import url('https://fonts.googleapis.com/css2?family=Martian+Mono:wght@100..800&display=swap');
+@import url('https://fonts.googleapis.com/css2?family=Martian+Mono:wght@100..800&family=Public+Sans:ital,wght@0,100..900;1,100..900&display=swap');
+
+$orangeBackground: #E4965B;
+$blueBackground: #062356;
+$greyBackground: #878888;
+
+$MartianMono: "Martian Mono", monospace;
+$PublicSans: "Public Sans", sans-serif;
+$whiteFontColor: #FFFFF2;
+$boldFontWeight: 900;
+
+$buttonColor: #878888;