feat: adds a ns-c-center-item helper class for centering an item in parent div

Author: gureckis

docs/styling.md

@@ -60,6 +60,18 @@ If you want to make bullets a little closer together to make spaceadd the `class
 
 Other options are `ns-c-tight` and `ns-c-supertight`.
 
+## Centering content
+
+If you have a div and want to to appear in the center of enclosing element:
+
+```md
+<div class="ns-c-center-item">
+  This is centered
+</div>
+```
+
+This sets the `margin-left` and `margin-right` to `auto` and the `width` to `fit-content`.
+
 ## `v-clicks` faders
 
 If you want to fade out a bullet as you step through, add the `class='ns-c-fader'`

styles/neversink-c.css

@@ -60,6 +60,12 @@
   align-items: start;
 }
 
+.ns-c-center-item {
+  margin-left: auto;
+  margin-right: auto;
+  width: fit-content;
+}
+
 .ns-c-center {
   justify-content: center; /* Horizontally center the content */
   text-align: center;