diff --git a/frontend/package-lock.json b/frontend/package-lock.json
index 5fbc04c..071a456 100644
--- a/frontend/package-lock.json
+++ b/frontend/package-lock.json
@@ -8,6 +8,8 @@
       "name": "mapdash-frontend",
       "version": "0.1.0",
       "dependencies": {
+        "@fontsource/ibm-plex-sans": "^5.3.0",
+        "open-props": "^1.7.23",
         "vis-data": "^7.1.9",
         "vis-timeline": "^7.7.3"
       },
@@ -420,6 +422,15 @@
         "node": ">=12"
       }
     },
+    "node_modules/@fontsource/ibm-plex-sans": {
+      "version": "5.3.0",
+      "resolved": "https://registry.npmjs.org/@fontsource/ibm-plex-sans/-/ibm-plex-sans-5.3.0.tgz",
+      "integrity": "sha512-CbE4CbbEEZJX860XyUiRpsksXIQR8Rp2XDva2VO53NJox9tVNtusrysd2x5YkUEY3ErQ66W1IiiQL8/wihhw5w==",
+      "license": "OFL-1.1",
+      "funding": {
+        "url": "https://github.com/sponsors/ayuhito"
+      }
+    },
     "node_modules/@rollup/rollup-android-arm-eabi": {
       "version": "4.62.2",
       "resolved": "https://registry.npmjs.org/@rollup/rollup-android-arm-eabi/-/rollup-android-arm-eabi-4.62.2.tgz",
@@ -898,6 +909,12 @@
         "node": "^10 || ^12 || ^13.7 || ^14 || >=15.0.1"
       }
     },
+    "node_modules/open-props": {
+      "version": "1.7.23",
+      "resolved": "https://registry.npmjs.org/open-props/-/open-props-1.7.23.tgz",
+      "integrity": "sha512-+xyrJmxV9QUBFbSwPROYhOg/FLXry+uuPr4R+B5EaE4556Oc18/8ZC/fL5A+/lbRSwNvA0Alh+C0KpyFWLmLZg==",
+      "license": "MIT"
+    },
     "node_modules/picocolors": {
       "version": "1.1.1",
       "resolved": "https://registry.npmjs.org/picocolors/-/picocolors-1.1.1.tgz",
diff --git a/frontend/package.json b/frontend/package.json
index b0a7ab8..dce464e 100644
--- a/frontend/package.json
+++ b/frontend/package.json
@@ -9,6 +9,8 @@
     "build": "tsc --noEmit && vite build"
   },
   "dependencies": {
+    "@fontsource/ibm-plex-sans": "^5.3.0",
+    "open-props": "^1.7.23",
     "vis-data": "^7.1.9",
     "vis-timeline": "^7.7.3"
   },
diff --git a/frontend/src/appearance.ts b/frontend/src/appearance.ts
index 79423c4..e863448 100644
--- a/frontend/src/appearance.ts
+++ b/frontend/src/appearance.ts
@@ -22,20 +22,20 @@ const LS_KEY = 'mapdash.appearance.v1';
 
 /** Sensible out-of-the-box colours for the known statuses. */
 export const DEFAULT_STATUS_COLORS: Record<string, string> = {
-  'РК. Новая': '#2e66d6',
-  'РК. Размещено': '#2e66d6',
-  'РК. Макет РИМ согласован': '#2e66d6',
-  'РК. Ожидает монтаж': '#2e66d6',
-  'РК. Ожидает демонтаж': '#2e66d6',
-  'РК. Ожидает перемонтаж': '#2e66d6',
-  'РК. Архив': '#2e66d6',
+  'РК. Новая': '#4f46e5',
+  'РК. Размещено': '#4f46e5',
+  'РК. Макет РИМ согласован': '#4f46e5',
+  'РК. Ожидает монтаж': '#4f46e5',
+  'РК. Ожидает демонтаж': '#4f46e5',
+  'РК. Ожидает перемонтаж': '#4f46e5',
+  'РК. Архив': '#4f46e5',
 };
 
 export function defaultAppearance(): Appearance {
   return {
     colors: { ...DEFAULT_STATUS_COLORS },
-    collisionColor: '#BA55D3',
-    defaultColor: '#2e66d6',
+    collisionColor: '#e8590c',
+    defaultColor: '#4f46e5',
     rowHeightPx: 30,
     barHeightPct: 62,
     barFontPx: 11,
diff --git a/frontend/src/main.ts b/frontend/src/main.ts
index 2df400e..5a8eca3 100644
--- a/frontend/src/main.ts
+++ b/frontend/src/main.ts
@@ -1,3 +1,13 @@
+// IBM Plex Sans — self-hosted (no runtime Google Fonts dependency), latin + cyrillic.
+import '@fontsource/ibm-plex-sans/400.css';
+import '@fontsource/ibm-plex-sans/500.css';
+import '@fontsource/ibm-plex-sans/600.css';
+import '@fontsource/ibm-plex-sans/700.css';
+import '@fontsource/ibm-plex-sans/cyrillic-400.css';
+import '@fontsource/ibm-plex-sans/cyrillic-500.css';
+import '@fontsource/ibm-plex-sans/cyrillic-600.css';
+import '@fontsource/ibm-plex-sans/cyrillic-700.css';
+
 import './styles.css';
 import 'vis-timeline/styles/vis-timeline-graph2d.min.css';
 
diff --git a/frontend/src/map.ts b/frontend/src/map.ts
index f713892..7671844 100644
--- a/frontend/src/map.ts
+++ b/frontend/src/map.ts
@@ -28,7 +28,7 @@ function donutSvg(total: number, busy: number): string {
     `<circle cx="${m}" cy="${m}" r="${r}" fill="none" stroke="${CLUSTER_BUSY}" stroke-width="${sw}" ` +
     `stroke-dasharray="${busyLen.toFixed(1)} ${c.toFixed(1)}" transform="rotate(-90 ${m} ${m})"/>` +
     `<text x="${m}" y="${m}" text-anchor="middle" dominant-baseline="central" ` +
-    `font-family="-apple-system,Segoe UI,Roboto,Arial,sans-serif" font-size="14" font-weight="700" fill="#1f2430">${total}</text>` +
+    `font-family="'IBM Plex Sans',sans-serif" font-size="14" font-weight="700" fill="#1f2430">${total}</text>` +
     `</svg>`
   );
 }
diff --git a/frontend/src/styles.css b/frontend/src/styles.css
index 392d0ed..c34abcd 100644
--- a/frontend/src/styles.css
+++ b/frontend/src/styles.css
@@ -1,3 +1,8 @@
+/* Open Props — design-token foundation (colours, shadows, easing, scales).
+   Our semantic tokens below are backed by its ramps, so the rest of the CSS
+   (which references var(--accent) etc.) is untouched. */
+@import "open-props/style";
+
 :root {
   /* appearance (overridden at runtime by appearance.ts) */
   --row-h: 30px;
@@ -6,32 +11,33 @@
   --label-font: 12px;
   --label-w: 340px;
 
-  /* ---- design tokens (light) ---- */
+  /* ---- design tokens (light), backed by Open Props ---- */
   --bg: #ffffff;
-  --surface: #f7f8fa;
-  --surface-2: #eef1f5;
-  --border: #e5e7eb;
-  --border-strong: #d1d6de;
-  --text: #1f2430;
-  --text-muted: #6b7280;
-  --accent: #2e66d6;
-  --accent-weak: rgba(46, 102, 214, .12);
-  --accent-ring: rgba(46, 102, 214, .20);
+  --surface: var(--gray-0);
+  --surface-2: var(--gray-1);
+  --border: var(--gray-3);
+  --border-strong: var(--gray-4);
+  --text: var(--gray-9);
+  --text-muted: var(--gray-6);
+  --font-sans: "IBM Plex Sans", -apple-system, "Segoe UI", Roboto, Arial, sans-serif;
+  --accent: #4f46e5;
+  --accent-weak: rgba(79, 70, 229, .12);
+  --accent-ring: rgba(79, 70, 229, .22);
   --radius: 8px;
   --radius-sm: 6px;
-  --shadow-sm: 0 1px 2px rgba(16, 24, 40, .06);
-  --shadow-md: 0 6px 18px rgba(16, 24, 40, .12);
-  --transition: .13s ease;
+  --shadow-sm: var(--shadow-1);
+  --shadow-md: var(--shadow-3);
+  --transition: .13s var(--ease-3);
 
   /* timeline / map surfaces (built on the tokens above) */
   --grid-line: var(--border);
-  --row-even: #f5f6f8;
+  --row-even: var(--gray-1);
   --row-odd: #ffffff;
   --row-hover: #fff3cd;
-  --month-hover: rgba(46, 102, 214, .08);
-  --tip-bg: #1f2430;
+  --month-hover: rgba(79, 70, 229, .08);
+  --tip-bg: var(--gray-9);
   --tip-text: #ffffff;
-  --tip-sub: #cfd3d6;
+  --tip-sub: var(--gray-4);
   --today: #ef5350;
 }
 
@@ -62,7 +68,7 @@ html, body { height: 100%; margin: 0; overflow: hidden; }
 body {
   display: flex;
   flex-direction: column;
-  font-family: -apple-system, "Segoe UI", Roboto, Arial, sans-serif;
+  font-family: var(--font-sans);
   background: var(--bg);
   color: var(--text);
 }
@@ -176,7 +182,7 @@ input::placeholder { color: var(--text-muted); }
   margin-top: auto; padding: 8px 12px;
   background: var(--surface-2); border: none;
   border-radius: var(--radius-sm); font-size: 12px; color: var(--text-muted);
-  line-height: 1.5; white-space: nowrap;
+  line-height: 1.5; white-space: nowrap; font-variant-numeric: tabular-nums;
 }
 
 /* Scale group: stack the "Оформление" button under the zoom slider. */
@@ -345,7 +351,7 @@ input::placeholder { color: var(--text-muted); }
   background: var(--bg); border: 1px solid var(--border); border-radius: var(--radius);
   padding: 8px 12px; font-size: 12px; color: var(--text);
   display: flex; flex-direction: column; align-items: flex-start; gap: 5px;
-  box-shadow: var(--shadow-md);
+  box-shadow: var(--shadow-md); font-variant-numeric: tabular-nums;
 }
 #map-legend .lg-item { display: inline-flex; align-items: center; gap: 6px; white-space: nowrap; font-size: 12px; }
 #map-legend #map-counter { padding-left: 18px; } /* align "всего" with the dotted rows */