Phase 1: Dashboard Polish + Theming (#457) (#458)

Co-authored-by: Jason Woltje <jason@diversecanvas.com>
Co-committed-by: Jason Woltje <jason@diversecanvas.com>

apps/web/src/app/globals.css

@@ -765,6 +765,62 @@ body::before {
   animation: scaleIn 0.1s ease-out;
 }
 
+/* -----------------------------------------------------------------------------
+   Dashboard Layout — Responsive Grids
+   ----------------------------------------------------------------------------- */
+.metrics-strip {
+  display: grid;
+  grid-template-columns: repeat(var(--ms-cols, 6), 1fr);
+  gap: 0;
+  border-radius: var(--r-lg);
+  overflow: hidden;
+  border: 1px solid var(--border);
+}
+
+.metric-cell {
+  border-left: 1px solid var(--border);
+}
+
+.metric-cell:first-child {
+  border-left: none;
+}
+
+@media (max-width: 900px) {
+  .metrics-strip {
+    grid-template-columns: repeat(3, 1fr);
+  }
+
+  .metric-cell:nth-child(3n + 1) {
+    border-left: none;
+  }
+}
+
+@media (max-width: 640px) {
+  .metrics-strip {
+    grid-template-columns: repeat(2, 1fr);
+  }
+
+  .metric-cell:nth-child(3n + 1) {
+    border-left: 1px solid var(--border);
+  }
+
+  .metric-cell:nth-child(2n + 1) {
+    border-left: none;
+  }
+}
+
+.dash-grid {
+  display: grid;
+  grid-template-columns: 1fr 320px;
+  gap: 16px;
+}
+
+@media (max-width: 900px) {
+  .dash-grid {
+    grid-template-columns: 1fr;
+  }
+}
+
 /* -----------------------------------------------------------------------------
    Responsive Typography Adjustments
    ----------------------------------------------------------------------------- */