Give a vertical toolbar 24dp and a standard one primary buttons

M3 asks a vertical toolbar for a 24dp margin from the window edge where a
horizontal one keeps 16, and its standard-toolbar colour list ends "Standard
button (Primary)" — the vibrant row of the same list was already honoured, so
the two were being read inconsistently. Both rules are unlayered, because an
icon button's ink is a utility.
Plan: docs/plans/material-3-alignment.md, step 21 (navigation N-12, N-13).

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01Qwx5USif3wFFmxtHg5U1g9

resources/css/components/toolbar.css

@@ -7,8 +7,12 @@
  *   floating   a 64px pill in surface-container (or primary-container, `vibrant`) at elevation 3,
  *              8px at its ends and 4px between controls; `vertical` stands it on end
  *
- * Unlayered on purpose: a vibrant toolbar recolours the icon buttons inside it, which draw their
- * ink as utilities, and a rule in any layer loses to a utility.
+ * Placed over the page, a horizontal toolbar keeps 16dp from the window's edge and a vertical one
+ * 24dp, which is M3's minimum for each.
+ *
+ * Unlayered on purpose: a toolbar recolours the icon buttons inside it — primary in a standard
+ * one, on-primary-container in a vibrant one — and they draw their ink as utilities, which a rule
+ * in any layer loses to.
  */
 
 [data-toolbar] {
@@ -60,6 +64,13 @@
     color: var(--md-sys-color-on-surface);
 }
 
+/* M3's colour list for a standard toolbar ends "Standard button (Primary)", as the vibrant list
+   ends "Standard button (On primary container)" — the row above. An icon button carries its own
+   ink as a utility, so the container's `color` never reaches it and this rule has to. */
+[data-toolbar]:not([data-vibrant]) [data-icon-button]:not([aria-pressed="true"]) {
+    color: var(--md-sys-color-primary);
+}
+
 /* A floating toolbar and its FAB, side by side (or stacked, vertical). */
 [data-toolbar-group] {
     display: inline-flex;
@@ -95,6 +106,14 @@
     translate: 0 -50%;
 }
 
+/* "Horizontal toolbars should have a minimum 16dp margin from the edge of the window. Vertical
+   toolbars should have a minimum 24dp margin"
+   (docs/reference/m3/components-navigation-selection-inputs.md § Toolbars). */
+[data-toolbar][data-vertical][data-toolbar-place="end"],
+[data-toolbar-group][data-vertical][data-toolbar-place="end"] {
+    inset-inline-end: calc(1.5rem + var(--material-safe-right, env(safe-area-inset-right)));
+}
+
 [data-toolbar][data-variant="docked"][data-toolbar-place="bottom"] {
     inset-inline: 0;
     bottom: var(--material-bottom-bar, 0px);