feat: add line-height-relaxed token and text selection/focus-visible styles

src/shared/styles/theme.css

@@ -23,6 +23,7 @@
   /* === LINE HEIGHT === */
   --line-height-tight: 1.2;
   --line-height-normal: 1.5;
+  --line-height-relaxed: 1.65;
 
   /* === FRAUNCES VARIABLE AXES === */
   --fraunces-wonk: 1;
@@ -132,6 +133,16 @@
     @apply border-border;
   }
 
+  ::selection {
+    background-color: var(--blue);
+    color: var(--cream);
+  }
+
+  :focus-visible {
+    outline: var(--border-width) solid var(--blue);
+    outline-offset: 2px;
+  }
+
   html {
     font-size: var(--font-size);
   }