style: Refactor global CSS by deleting styles/index.css, updating import paths, and modifying index.css styles.

src/styles/index.css

@@ -1,54 +0,0 @@
-@import './variables.css';
-
-* {
-    box-sizing: border-box;
-    margin: 0;
-    padding: 0;
-    -webkit-font-smoothing: antialiased;
-    -moz-osx-font-smoothing: grayscale;
-}
-
-body {
-    background-color: var(--bg-color);
-    color: var(--text-main);
-    font-family: var(--font-main);
-    font-size: 14px;
-    line-height: 1.5;
-    overflow-x: hidden;
-    /* Hide scrollbar potentially */
-}
-
-a {
-    color: inherit;
-    text-decoration: none;
-}
-
-ul {
-    list-style: none;
-}
-
-/* Utilities */
-.uppercase {
-    text-transform: uppercase;
-    letter-spacing: 0.05em;
-}
-
-.mono {
-    font-family: monospace;
-}
-
-canvas {
-    touch-action: none;
-}
-
-/* Utility to hide scrollbar */
-.hide-scrollbar {
-    -ms-overflow-style: none !important;
-    /* IE and Edge */
-    scrollbar-width: none !important;
-    /* Firefox */
-}
-
-.hide-scrollbar::-webkit-scrollbar {
-    display: none !important;
-}