Added various css things

- Designed login and register buttons
- removed some unnecessary css things
- changed some small things in the design

frontend/src/App.css

@@ -7,8 +7,10 @@
 
 :root {
   --primary: rgb(41, 63, 87);
+  --primary-contr: rgb(9, 11, 46);
   --secondary: rgb(218,218,218);
   --third: rgb(171, 183, 183);
+  --forth: rgb(255,255,255);
 }
 
 .home,
@@ -37,7 +39,7 @@
   color: var(--primary);
 }
 
-.sitePage h1 {
+h1 {
   font-size: 5em;
   margin: 0.7em auto;
 }
@@ -48,7 +50,7 @@
 }
 
 .sitePage p {
-  font-size: 2em;
+  font-size: 1.5em;
   max-width: 60%;
   margin-bottom: 4vh;
 }