added font to css

css/style.css

@@ -1,5 +1,13 @@
 *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
 
+@font-face {
+  font-family: 'IBM Plex Mono';
+  font-style: normal;
+  font-weight: 400;
+  font-display: swap;
+  src: url('/fonts/ibm-plex-mono-400.woff2') format('woff2');
+}
+
 :root {
   --bg:        #0a0c10;
   --bg2:       #0f1218;