Add baseline start point (#1)

Co-authored-by: Michael DiLeo <michael.dileo@oakstreethealth.com>
Reviewed-on: #1

public/scss/layout/_grid.scss

@@ -0,0 +1,26 @@
+@use "sass:map";
+@use "../settings" as *;
+
+@if map.get($modules, "layout/grid") and $enable-classes {
+  /**
+   * Grid
+   * Minimal grid system with auto-layout columns
+   */
+
+  .grid {
+    grid-column-gap: var(#{$css-var-prefix}grid-column-gap);
+    grid-row-gap: var(#{$css-var-prefix}grid-row-gap);
+    display: grid;
+    grid-template-columns: 1fr;
+
+    @if map.get($breakpoints, "md") {
+      @media (min-width: map.get(map.get($breakpoints, "md"), "breakpoint")) {
+        grid-template-columns: repeat(auto-fit, minmax(0%, 1fr));
+      }
+    }
+
+    & > * {
+      min-width: 0; // HACK for children in overflow
+    }
+  }
+}