diff --git a/CHANGELOG.md b/CHANGELOG.md
index 113f4cc..0048cd9 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -7,6 +7,15 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+## [0.19.2] - 2026-04-14
+
+### Improved
+- Accessibility: FAB focus ring now uses a double-ring pattern (inner `--color-bg`, outer `--color-accent`) visible on any background - previously hardcoded `#fff` was invisible on light backgrounds
+- Accessibility: added `forced-colors` media query fallback for Windows High Contrast Mode (buttons, cards, modals, active nav items)
+- Design tokens: extracted `--color-accent-secondary`, `--content-max-width-narrow`, `--cal-hour-height` - eliminates last hardcoded values in layout, settings, and calendar CSS
+- Dark mode: Apple sync logo in settings now uses semantic tokens (`--color-text-primary` / `--color-bg`) instead of fixed neutrals that didn't invert correctly
+- Sidebar logo gradient now references `--color-accent-secondary` token instead of hardcoded `#7C5CFC`
+
 ## [0.19.1] - 2026-04-14
 
 ### Fixed
diff --git a/package.json b/package.json
index e82a045..81b93b7 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "oikos",
-  "version": "0.19.1",
+  "version": "0.19.2",
   "description": "Self-hosted family planner - calendar, tasks, shopping, meal planning, budget and more. Private, open-source, no subscription.",
   "main": "server/index.js",
   "type": "module",
diff --git a/public/styles/calendar.css b/public/styles/calendar.css
index cb4a1dc..cfb8108 100644
--- a/public/styles/calendar.css
+++ b/public/styles/calendar.css
@@ -288,7 +288,7 @@
 
 .week-view__body {
   display: flex;
-  min-height: calc(24 * 56px); /* 24h × 56px pro Stunde */
+  min-height: calc(24 * var(--cal-hour-height)); /* 24h × 56px pro Stunde */
   position: relative;
 }
 
@@ -299,7 +299,7 @@
 }
 
 .week-view__time-slot {
-  height: 56px;
+  height: var(--cal-hour-height);
   padding-right: var(--space-2);
   display: flex;
   align-items: flex-start;
@@ -415,7 +415,7 @@
 
 .day-view__body {
   display: flex;
-  min-height: calc(24 * 56px);
+  min-height: calc(24 * var(--cal-hour-height));
   position: relative;
 }
 
diff --git a/public/styles/layout.css b/public/styles/layout.css
index d40b73e..0fcf55f 100644
--- a/public/styles/layout.css
+++ b/public/styles/layout.css
@@ -253,8 +253,9 @@
 }
 
 .page-fab:focus-visible {
-  outline: 2px solid #fff;
+  outline: 2px solid var(--color-bg);
   outline-offset: 2px;
+  box-shadow: 0 0 0 4px var(--color-accent);
 }
 
 /* Desktop: FAB Position anpassen (keine Bottom-Nav) und etwas kleiner */
@@ -333,7 +334,7 @@
     width: var(--target-sm);
     height: var(--target-sm);
     border-radius: var(--radius-sm);
-    background: linear-gradient(135deg, var(--color-accent) 0%, #7C5CFC 100%);
+    background: linear-gradient(135deg, var(--color-accent) 0%, var(--color-accent-secondary) 100%);
     color: var(--color-text-on-accent);
     font-size: var(--text-sm);
     font-weight: var(--font-weight-bold);
@@ -942,8 +943,9 @@
 }
 
 .fab:focus-visible {
-  outline: 2px solid #fff;
+  outline: 2px solid var(--color-bg);
   outline-offset: 2px;
+  box-shadow: 0 0 0 4px var(--color-accent);
 }
 
 @media (min-width: 1024px) {
@@ -1739,3 +1741,15 @@
   font-size: var(--text-sm);
   border-radius: 0 0 var(--radius-sm) 0;
 }
+
+/* --------------------------------------------------------
+ * Windows High Contrast / Forced Colors
+ * -------------------------------------------------------- */
+@media (forced-colors: active) {
+  .btn,
+  .page-fab,
+  .fab          { border: 1px solid ButtonText; }
+  .card         { border: 1px solid CanvasText; }
+  .modal-panel  { border: 2px solid CanvasText; }
+  .nav-item[aria-current="page"] { border-bottom: 2px solid Highlight; }
+}
diff --git a/public/styles/settings.css b/public/styles/settings.css
index c624f1c..b66fecd 100644
--- a/public/styles/settings.css
+++ b/public/styles/settings.css
@@ -14,7 +14,7 @@
    -------------------------------------------------------- */
 
 .settings-page {
-  max-width: 720px;
+  max-width: var(--content-max-width-narrow);
   margin: 0 auto;
 }
 
@@ -250,8 +250,8 @@
 }
 
 .settings-sync-logo--apple {
-  background: var(--neutral-900);
-  color: var(--neutral-50);
+  background: var(--color-text-primary);
+  color: var(--color-bg);
 }
 
 .settings-sync-info__name {
diff --git a/public/styles/tokens.css b/public/styles/tokens.css
index fa79211..2720df5 100644
--- a/public/styles/tokens.css
+++ b/public/styles/tokens.css
@@ -64,6 +64,7 @@
   --color-accent-hover:     #1D4ED8;
   --color-accent-active:    #1E40AF;
   --color-accent-deep:      #1E5CB3;       /* Tiefer Akzent für Gradienten, Wetter-Widget */
+  --color-accent-secondary: #7C5CFC;       /* Sekundärer Akzent für Logo-Gradient */
   --color-accent-light:     #EFF6FF;
   --color-accent-subtle:    #DBEAFE;
   --color-btn-primary:      #2554C7;       /* WCAG AA: 6.62:1 auf weiß (weißer Text) */
@@ -223,6 +224,8 @@
   --sidebar-width: 56px;             /* collapsed icon-only (1024–1279px) */
   --sidebar-width-expanded: 220px;   /* full sidebar (1280px+), max 240px laut Spec */
   --content-max-width: 1280px;
+  --content-max-width-narrow: 720px;
+  --cal-hour-height: 56px;
 
   /* --------------------------------------------------------
    * 13. Sidebar
@@ -362,6 +365,8 @@
     --color-btn-primary:       #3B82F6;
     --color-btn-primary-hover: #2563EB;
 
+    --color-accent-secondary: #A78BFA;
+
     /* Semantische Farben - Dark Mode */
     --color-success:       #4ADE80;
     --color-warning:       #F59E0B;
@@ -463,6 +468,7 @@
   --color-accent-subtle:     #1E3050;
   --color-btn-primary:       #3B82F6;
   --color-btn-primary-hover: #2563EB;
+  --color-accent-secondary:  #A78BFA;
 
   /* Semantische Farben - Dark Mode */
   --color-success:       #4ADE80;