diff --git a/web/public/favicon-512.png b/web/public/favicon-512.png
new file mode 100755
index 0000000..779af48
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diff --git a/web/public/logo.svg b/web/public/logo.svg
new file mode 100755
index 0000000..158748a
--- /dev/null
+++ b/web/public/logo.svg
@@ -0,0 +1,4 @@
+<svg width="100" height="100" viewBox="0 0 100 100" xmlns="http://www.w3.org/2000/svg" role="img" aria-label="Modular Mind">
+  <rect x="2" y="2" width="96" height="96" rx="24" fill="#f2a63c"></rect>
+  <path d="M 18 50 C 26 28 42 28 50 50 C 58 72 74 72 82 50" fill="none" stroke="#17140f" stroke-width="7.5" stroke-linecap="round" stroke-linejoin="round"></path>
+</svg>
\ No newline at end of file
diff --git a/web/src/app/apple-icon.png b/web/src/app/apple-icon.png
new file mode 100755
index 0000000..26bce16
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diff --git a/web/src/app/brand-tokens.css b/web/src/app/brand-tokens.css
new file mode 100755
index 0000000..da3ee35
--- /dev/null
+++ b/web/src/app/brand-tokens.css
@@ -0,0 +1,208 @@
+/* Modular Mind brand tokens — ported from the design system.
+ * Fonts are loaded via next/font in layout.tsx, which supplies the
+ * --font-archivo / --font-plex-sans / --font-plex-mono variables used below. */
+
+/* Modular Mind — Color tokens
+ * Direction: Rack Panel — warm graphite anthracite surfaces (eurorack front panels),
+ * a single amber "signal" accent, and a tight verdict semantic set.
+ * Base scales first, then semantic aliases. */
+:root {
+  /* ---- Graphite neutrals (warm-tinted anthracite) ---- */
+  --mm-black:          #0c0a07;   /* deepest, page void */
+  --mm-graphite-950:   #131009;   /* page background */
+  --mm-graphite-900:   #1c1811;   /* recessed surface */
+  --mm-graphite-800:   #26221b;   /* panel */
+  --mm-graphite-700:   #302a20;   /* raised panel / hover */
+  --mm-graphite-600:   #3a3428;   /* hairline / border */
+  --mm-graphite-500:   #4a4335;   /* strong border / divider */
+  --mm-graphite-400:   #6f6656;   /* faint text, ticks */
+  --mm-graphite-300:   #a2988a;   /* dim text */
+  --mm-graphite-200:   #d6cdbe;   /* secondary text */
+  --mm-graphite-100:   #f2ece0;   /* primary text (warm bone) */
+
+  /* ---- Amber signal (the one accent) ---- */
+  --mm-amber-bright:   #ffbe5c;   /* hover / peak highlight */
+  --mm-amber:          #f2a63c;   /* primary accent, waveform, active */
+  --mm-amber-deep:     #c77f22;   /* pressed */
+  --mm-amber-dim:      #4a3418;   /* accent fill / tint background */
+  --mm-amber-ink:      #17140f;   /* text/glyph on amber fills */
+
+  /* ---- Verdict semantics ---- */
+  --mm-caution:        #f2c14e;   /* dc_offset, near_silent */
+  --mm-caution-dim:    #40350f;
+  --mm-fault:          #e8664e;   /* clipping */
+  --mm-fault-dim:      #3d1c14;
+  --mm-good:           #f2a63c;   /* passing / makes sound — reuses signal amber */
+
+  /* ---- Semantic aliases ---- */
+  --mm-bg:             var(--mm-graphite-950);
+  --mm-surface:        var(--mm-graphite-900);
+  --mm-panel:          var(--mm-graphite-800);
+  --mm-panel-raised:   var(--mm-graphite-700);
+  --mm-border:         var(--mm-graphite-600);
+  --mm-border-strong:  var(--mm-graphite-500);
+  --mm-divider:        var(--mm-graphite-600);
+
+  --mm-text:           var(--mm-graphite-100);
+  --mm-text-secondary: var(--mm-graphite-200);
+  --mm-text-dim:       var(--mm-graphite-300);
+  --mm-text-faint:     var(--mm-graphite-400);
+
+  --mm-accent:         var(--mm-amber);
+  --mm-accent-hover:   var(--mm-amber-bright);
+  --mm-accent-active:  var(--mm-amber-deep);
+  --mm-accent-tint:    var(--mm-amber-dim);
+  --mm-on-accent:      var(--mm-amber-ink);
+
+  --mm-signal:         var(--mm-amber);       /* waveform trace */
+  --mm-signal-grid:    rgba(242,166,60,.08);  /* scope grid lines */
+
+  --mm-link:           var(--mm-amber);
+  --mm-link-hover:     var(--mm-amber-bright);
+}
+
+/* Modular Mind — Typography tokens
+ * Archivo        → display / headings (mechanical grotesque, tight)
+ * IBM Plex Sans  → body / prose
+ * IBM Plex Mono  → data, labels, slugs, metrics, "readouts"
+ * Mono carries the instrument-panel voice; use it for anything numeric or code-like. */
+:root {
+  /* ---- Families ---- */
+  --mm-font-display: var(--font-archivo), 'Helvetica Neue', Arial, sans-serif;
+  --mm-font-body:    var(--font-plex-sans), system-ui, sans-serif;
+  --mm-font-mono:    var(--font-plex-mono), ui-monospace, 'SF Mono', Menlo, monospace;
+
+  /* ---- Weights ---- */
+  --mm-weight-regular: 400;
+  --mm-weight-medium:  500;
+  --mm-weight-semibold:600;
+  --mm-weight-bold:    700;
+  --mm-weight-display: 800;
+
+  /* ---- Type scale (px) ---- */
+  --mm-size-3xs: 9px;    /* micro caps / ticks */
+  --mm-size-2xs: 10px;   /* mono labels */
+  --mm-size-xs:  11px;   /* meta, slugs */
+  --mm-size-sm:  13px;   /* body small, table */
+  --mm-size-md:  15px;   /* body */
+  --mm-size-lg:  17px;   /* card title */
+  --mm-size-xl:  21px;   /* section title */
+  --mm-size-2xl: 28px;   /* stat number / page sub */
+  --mm-size-3xl: 40px;   /* page title */
+  --mm-size-4xl: 60px;   /* hero */
+
+  /* ---- Line heights ---- */
+  --mm-leading-tight:  1.1;
+  --mm-leading-snug:   1.3;
+  --mm-leading-normal: 1.55;
+
+  /* ---- Letter spacing ---- */
+  --mm-tracking-tight:  -0.02em;  /* display */
+  --mm-tracking-normal: 0;
+  --mm-tracking-label:  0.08em;   /* mono labels */
+  --mm-tracking-caps:   0.14em;   /* micro caps */
+
+  /* ---- Semantic roles ---- */
+  --mm-text-hero:    var(--mm-weight-display) var(--mm-size-4xl)/var(--mm-leading-tight) var(--mm-font-display);
+  --mm-text-title:   var(--mm-weight-bold) var(--mm-size-3xl)/var(--mm-leading-tight) var(--mm-font-display);
+  --mm-text-section: var(--mm-weight-bold) var(--mm-size-xl)/var(--mm-leading-snug) var(--mm-font-display);
+  --mm-text-card:    var(--mm-weight-bold) var(--mm-size-lg)/var(--mm-leading-snug) var(--mm-font-display);
+  --mm-text-body:    var(--mm-weight-regular) var(--mm-size-md)/var(--mm-leading-normal) var(--mm-font-body);
+  --mm-text-body-sm: var(--mm-weight-regular) var(--mm-size-sm)/var(--mm-leading-normal) var(--mm-font-body);
+  --mm-text-mono:    var(--mm-weight-regular) var(--mm-size-xs)/var(--mm-leading-snug) var(--mm-font-mono);
+  --mm-text-readout: var(--mm-weight-bold) var(--mm-size-2xl)/var(--mm-leading-tight) var(--mm-font-mono);
+}
+
+/* Modular Mind — Spacing tokens. 4px base grid; dense instrument-panel rhythm. */
+:root {
+  --mm-space-0: 0;
+  --mm-space-1: 2px;
+  --mm-space-2: 4px;
+  --mm-space-3: 6px;
+  --mm-space-4: 8px;
+  --mm-space-5: 10px;
+  --mm-space-6: 12px;
+  --mm-space-7: 14px;
+  --mm-space-8: 16px;
+  --mm-space-10: 20px;
+  --mm-space-12: 24px;
+  --mm-space-14: 28px;
+  --mm-space-16: 32px;
+  --mm-space-20: 40px;
+  --mm-space-24: 48px;
+  --mm-space-32: 64px;
+
+  /* Semantic */
+  --mm-pad-badge:  4px 8px;
+  --mm-pad-button: 8px 14px;
+  --mm-pad-card:   16px 18px;
+  --mm-pad-panel:  18px;
+  --mm-gap-tight:  6px;
+  --mm-gap:        12px;
+  --mm-gap-loose:  20px;
+
+  /* Layout */
+  --mm-content-max: 1120px;
+  --mm-nav-height:  52px;
+}
+
+/* Modular Mind — Radius tokens. Tight & technical — machined panel corners, never pill-soft. */
+:root {
+  --mm-radius-none: 0;
+  --mm-radius-xs:   2px;   /* ticks, inner elements */
+  --mm-radius-sm:   3px;   /* badges, buttons, inputs */
+  --mm-radius-md:   5px;   /* cards, panels */
+  --mm-radius-lg:   8px;   /* large surfaces, modals */
+  --mm-radius-full: 999px; /* status dots, play button only */
+
+  /* Semantic */
+  --mm-radius-badge:  var(--mm-radius-sm);
+  --mm-radius-button: var(--mm-radius-sm);
+  --mm-radius-card:   var(--mm-radius-md);
+  --mm-radius-panel:  var(--mm-radius-md);
+}
+
+/* Modular Mind — Elevation & effects.
+ * Panels read like machined front panels: a faint top light-line, a seated drop shadow,
+ * a hairline border. The amber glow is reserved for live signal (waveform, play, active). */
+:root {
+  /* Border-as-elevation hairlines are the primary separation; shadows are subtle. */
+  --mm-shadow-panel:
+    inset 0 1px 0 rgba(255,255,255,.035),
+    0 1px 2px rgba(0,0,0,.5);
+  --mm-shadow-raised:
+    inset 0 1px 0 rgba(255,255,255,.05),
+    0 4px 14px rgba(0,0,0,.45);
+  --mm-shadow-pop:
+    inset 0 1px 0 rgba(255,255,255,.06),
+    0 12px 34px rgba(0,0,0,.55);
+  --mm-shadow-inset:
+    inset 0 1px 3px rgba(0,0,0,.5);
+
+  /* Signal glow — amber phosphor */
+  --mm-glow-signal:   0 0 12px rgba(242,166,60,.45);
+  --mm-glow-signal-sm:0 0 6px rgba(242,166,60,.5);
+  --mm-glow-fault:    0 0 10px rgba(232,102,78,.45);
+
+  /* Focus ring */
+  --mm-ring: 0 0 0 2px var(--mm-graphite-950), 0 0 0 3.5px var(--mm-amber);
+}
+
+/* Modular Mind — Motion. Mechanical and fast: linear-ish snaps, no bounce, no float.
+ * Hover brightens borders/fills; press seats the element down 1px. */
+:root {
+  --mm-dur-instant: 80ms;  /* @kind other */
+  --mm-dur-fast:    130ms; /* @kind other */
+  --mm-dur:         200ms; /* @kind other */
+  --mm-dur-slow:    340ms; /* @kind other */
+
+  --mm-ease:        cubic-bezier(.2,.7,.3,1);   /* @kind other */
+  --mm-ease-out:    cubic-bezier(.16,1,.3,1);   /* @kind other */
+  --mm-ease-linear: linear;                     /* @kind other */
+
+  --mm-transition-control: background var(--mm-dur-fast) var(--mm-ease),
+                           border-color var(--mm-dur-fast) var(--mm-ease),
+                           color var(--mm-dur-fast) var(--mm-ease),
+                           transform var(--mm-dur-instant) var(--mm-ease);
+}
+
diff --git a/web/src/app/favicon.ico b/web/src/app/favicon.ico
index 718d6fe..816a7ea 100644
Binary files a/web/src/app/favicon.ico and b/web/src/app/favicon.ico differ
diff --git a/web/src/app/globals.css b/web/src/app/globals.css
index f1d8c73..ef11850 100644
--- a/web/src/app/globals.css
+++ b/web/src/app/globals.css
@@ -1 +1,17 @@
 @import "tailwindcss";
+@import "./brand-tokens.css";
+
+/* Brand ground + base type (was: bg-zinc-950 / text-zinc-100 utility classes).
+ * These must live in @layer base: unlayered rules outrank every Tailwind
+ * utility, which would make `a` here override any text-colour class. */
+@layer base {
+  body {
+    background: var(--mm-bg);
+    color: var(--mm-text);
+    font: var(--mm-text-body);
+    -webkit-font-smoothing: antialiased;
+  }
+  a { color: var(--mm-link); text-decoration: none; }
+  a:hover { color: var(--mm-link-hover); }
+  ::selection { background: var(--mm-amber-dim); color: var(--mm-amber-bright); }
+}
diff --git a/web/src/app/icon.svg b/web/src/app/icon.svg
new file mode 100755
index 0000000..158748a
--- /dev/null
+++ b/web/src/app/icon.svg
@@ -0,0 +1,4 @@
+<svg width="100" height="100" viewBox="0 0 100 100" xmlns="http://www.w3.org/2000/svg" role="img" aria-label="Modular Mind">
+  <rect x="2" y="2" width="96" height="96" rx="24" fill="#f2a63c"></rect>
+  <path d="M 18 50 C 26 28 42 28 50 50 C 58 72 74 72 82 50" fill="none" stroke="#17140f" stroke-width="7.5" stroke-linecap="round" stroke-linejoin="round"></path>
+</svg>
\ No newline at end of file
diff --git a/web/src/app/layout.tsx b/web/src/app/layout.tsx
index 2db9bc7..35e5d7a 100644
--- a/web/src/app/layout.tsx
+++ b/web/src/app/layout.tsx
@@ -1,7 +1,27 @@
 import type { Metadata } from 'next'
+import { Archivo, IBM_Plex_Sans, IBM_Plex_Mono } from 'next/font/google'
 import { SiteNav } from '@/components/site-nav'
 import './globals.css'
 
+const archivo = Archivo({
+  subsets: ['latin'],
+  variable: '--font-archivo',
+})
+
+const plexSans = IBM_Plex_Sans({
+  subsets: ['latin'],
+  weight: ['400', '500', '600'],
+  variable: '--font-plex-sans',
+})
+
+// IBM Plex Mono has no variable cut on Google Fonts — weights must be listed.
+// 700 is required by --mm-text-readout.
+const plexMono = IBM_Plex_Mono({
+  subsets: ['latin'],
+  weight: ['400', '500', '600', '700'],
+  variable: '--font-plex-mono',
+})
+
 export const metadata: Metadata = {
   title: 'Modular Mind',
   description: 'An AI that learns to build modular synth patches — explore the pipeline and listen to what it makes.',
@@ -9,8 +29,11 @@ export const metadata: Metadata = {
 
 export default function RootLayout({ children }: { children: React.ReactNode }) {
   return (
-    <html lang="en" className="dark">
-      <body className="min-h-screen bg-zinc-950 text-zinc-100 antialiased">
+    <html
+      lang="en"
+      className={`dark ${archivo.variable} ${plexSans.variable} ${plexMono.variable}`}
+    >
+      <body className="min-h-screen">
         <SiteNav />
         <main className="mx-auto max-w-5xl px-6 py-10">{children}</main>
       </body>
diff --git a/web/src/components/site-nav.tsx b/web/src/components/site-nav.tsx
index 299e40a..2f8150d 100644
--- a/web/src/components/site-nav.tsx
+++ b/web/src/components/site-nav.tsx
@@ -14,8 +14,8 @@ const links = [
 export function SiteNav() {
   const pathname = usePathname()
   return (
-    <nav className="flex gap-6 border-b border-zinc-800 px-6 py-4 text-sm">
-      <Link href="/" className="font-semibold tracking-tight">
+    <nav className="flex items-center gap-6 border-b border-[var(--mm-border)] bg-[var(--mm-surface)] px-6 text-sm h-[var(--mm-nav-height)]">
+      <Link href="/" className="font-semibold tracking-tight text-[var(--mm-accent)]">
         Modular Mind
       </Link>
       {links.map((l) => {
@@ -25,7 +25,11 @@ export function SiteNav() {
             key={l.href}
             href={l.href}
             aria-current={isActive ? 'page' : undefined}
-            className="text-zinc-400 hover:text-zinc-100"
+            className={
+              isActive
+                ? 'text-[var(--mm-text)]'
+                : 'text-[var(--mm-text-dim)] hover:text-[var(--mm-text)]'
+            }
           >
             {l.label}
           </Link>