Bootstrap Hugo site with PaperMod theme and custom homepage

Sets up the ReGround business site: PaperMod theme (v8.0) as a
submodule, pinned Hugo 0.124.1, and a custom homepage hero
overriding the theme's default blog-first layout with editable
front-matter copy.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

assets/css/extended/custom.css

@@ -0,0 +1,49 @@
+:root {
+  --accent: #b5533c;
+}
+
+.dark {
+  --accent: #e0785f;
+}
+
+.hero {
+  max-width: var(--main-width);
+  margin: 12vh auto 10vh;
+  padding: 0 var(--gap);
+  text-align: center;
+}
+
+.hero-heading {
+  font-size: 2.4rem;
+  line-height: 1.25;
+  margin: 0 0 1rem;
+}
+
+.hero-subheading {
+  font-size: 1.25rem;
+  color: var(--secondary);
+  margin: 0 0 2.5rem;
+}
+
+.hero-intro {
+  max-width: 42rem;
+  margin: 0 auto 2.5rem;
+  text-align: left;
+  color: var(--content);
+  line-height: 1.7;
+}
+
+.hero-cta {
+  display: inline-block;
+  padding: 0.75rem 1.75rem;
+  border-radius: var(--radius);
+  background: var(--accent);
+  color: #fff;
+  font-weight: 600;
+  text-decoration: none;
+  transition: opacity 0.15s ease;
+}
+
+.hero-cta:hover {
+  opacity: 0.85;
+}