Add custom style for spirits.

assets/scss/spirits.scss

@@ -0,0 +1,25 @@
+$color-muted-plum: #3d2b3d;
+$color-ashy-orange: #4a3428;
+$color-storm: darken(#1e2a3d, 5%);
+
+html {
+  background-color: $color-storm;
+}
+
+body {
+  background-image: linear-gradient(
+    180deg,
+    $color-storm  0%,
+    $color-muted-plum  5%,
+    $color-ashy-orange 15%,
+    $color-storm 100%,
+  );
+}
+
+code {
+  background: none;
+  border: none;
+  padding: 0;
+  font-family: serif;
+  font-variant-caps: small-caps;
+}