chore: remove unused css and fonts

src/index.css

@@ -1,11 +1,8 @@
 :root {
-  font-family: system-ui, Avenir, Helvetica, Arial, sans-serif;
   line-height: 1.5;
   font-weight: 400;
 
   color-scheme: light dark;
-  color: rgba(255, 255, 255, 0.87);
-  background-color: #242424;
 
   font-synthesis: none;
   text-rendering: optimizeLegibility;
@@ -14,20 +11,14 @@
   -webkit-text-size-adjust: 100%;
 }
 
-a {
-  font-weight: 500;
-  color: #646cff;
-  text-decoration: inherit;
-}
-a:hover {
-  color: #535bf2;
+* {
+  box-sizing: border-box;
 }
 
 body {
   margin: 0;
   min-width: 320px;
   min-height: 100vh;
-  background-color: #f4f4fb;
   overflow-wrap: break-word;
 }
 
@@ -55,24 +46,10 @@ button {
   z-index: 100;
 }
 
-@media (prefers-color-scheme: light) {
-  :root {
-    color: #213547;
-    background-color: #ffffff;
-  }
-  a:hover {
-    color: #747bff;
-  }
-  button {
-    background-color: #f9f9f9;
-  }
-}
-
 #root {
   min-height: 100vh;
   display: flex;
   flex-direction: column;
-  background: white;
 }
 
 .hide-mobile {