💄 style(css): remove redundant padding and add global reset

- remove unnecessary padding-bottom in ContactSection for cleaner layout
- add margin and padding reset in index.css for consistent styling across browsers

Author: isfopo

src/components/Section/ContactSection/index.module.css

@@ -7,7 +7,6 @@
     justify-content: center;
     justify-content: space-evenly;
     gap: 2rem;
-    padding-bottom: 2rem;
 
     > a {
       width: 100%;

src/index.css

@@ -7,13 +7,13 @@
   font-weight: 400;
 
   color-scheme: light dark;
-  color: rgba(255, 255, 255, 0.87);
-  background-color: #242424;
 
   font-synthesis: none;
   text-rendering: optimizeLegibility;
   -webkit-font-smoothing: antialiased;
   -moz-osx-font-smoothing: grayscale;
+  margin: 0;
+  padding: 0;
 }
 
 body {