14rem minimums left the main columns cramped alongside the
16rem sidebar. 18rem minimums and an 80rem container give
more breathing room on wide viewports.

Assisted-by: Claude Opus 4.6 via Claude Code

diff --git a/public/css/app.css b/public/css/app.css
index 345f6d6..1e7bd3e 100644
--- a/public/css/app.css
+++ b/public/css/app.css
@@ -89,11 +89,11 @@ h2 { font-size: var(--step-0); font-weight: 600; }
 
 .home {
   display: grid;
-  grid-template-columns: minmax(14rem, 1fr) minmax(14rem, 1fr) auto;
+  grid-template-columns: minmax(18rem, 1fr) minmax(18rem, 1fr) auto;
   align-items: start;
   gap: var(--space-xl);
   padding: var(--space-m) var(--grid-gutter);
-  max-width: 72rem;
+  max-width: 80rem;
   margin-inline: auto;
 }