🔥 Huge style refactoring by using SvelteKit built-in style tag

It's been tricky but got there finally! Hello `:global`
- Avoid using one global CSS file containing everything
- Import the component SCSS file in a script tag from the component file to allow style scoping and including it only when used

src/style/imports.scss

@@ -0,0 +1,4 @@
+// Tools
+@import "variables";
+@import "tools/mixins";
+@import "tools/functions";