feat: a shorter page on phones

On a phone the homepage was about 29 screens long; it is now about 22.
The desktop layout is unchanged to the pixel.

Lists of equal items (automation notes, project fit, principles, reasons for
a web presentation, by hand vs. automated) are swiped through side by side
(SwipeRow) instead of stacked. The four service cards form a compact 2x2
grid, step lists spell out only the current step, the workflow legend and
the per-project task lists are left out, and sections use less padding.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

apps/web/app/globals.css

@@ -1352,6 +1352,38 @@ pre:has(code[class*="language-"]) {
   }
 }
 
+/*
+ * SwipeRow: on phones equal items stand side by side and are swiped through,
+ * with the next one peeking in. From tablet width on the slide wrappers
+ * dissolve and the items sit in the grid the row was given.
+ */
+@media (max-width: 767px) {
+  .swipe-row {
+    display: flex;
+    gap: 1rem;
+    overflow-x: auto;
+    overscroll-behavior-x: contain;
+    scroll-snap-type: x mandatory;
+    /* Bleed to the screen edges, but start in line with the text. */
+    margin-inline: -1.25rem;
+    padding-inline: 1.25rem;
+    scroll-padding-inline: 1.25rem;
+    scrollbar-width: none;
+  }
+  .swipe-row::-webkit-scrollbar {
+    display: none;
+  }
+  .swipe-slide {
+    flex: 0 0 82%;
+    scroll-snap-align: start;
+  }
+}
+@media (min-width: 768px) {
+  .swipe-slide {
+    display: contents;
+  }
+}
+
 /*
  * Native feel: the page should behave like a well-made app on every input type.
  */