feat: ✨ move styles out of App.vue and modularize

src/scss/base.scss

@@ -0,0 +1,49 @@
+@import url("https://fonts.googleapis.com/css?family=Exo:300,300i,900,900i|Fira+Sans+Extra+Condensed:300,700&display=swap");
+@import "variables";
+@import "mixins";
+@import "flex";
+
+* {
+  box-sizing: border-box;
+}
+
+:root {
+  font-family: "Fira Sans Extra Condensed", sans-serif;
+  font-size: 16px;
+  line-height: 1.5;
+  text-size-adjust: 100%;
+}
+
+.bubbles {
+  background-color: $bg-color-dark;
+  position: fixed;
+  top: 0;
+  right: 0;
+  bottom: 0;
+  left: 0;
+  overflow: hidden;
+  z-index: -1;
+
+  &::before,
+  &::after {
+      content: "";
+      position: absolute;
+      border-radius: 100%;
+  }
+
+  &::before {
+      background-color: rgba(lighten($bg-color-dark, 10%), 0.7);
+      height: 80vw;
+      width: 80vw;
+      bottom: -45vw;
+      right: -25vw;
+  }
+
+  &::after {
+      background-color: rgba(lighten($bg-color-dark, 10%), 0.7);
+      height: 80vw;
+      width: 80vw;
+      bottom: -25vw;
+      right: -50vw;
+  }
+}