diff --git a/src/components/AddressDisplay.tsx b/src/components/AddressDisplay.tsx
index 4bb494b..627e283 100644
--- a/src/components/AddressDisplay.tsx
+++ b/src/components/AddressDisplay.tsx
@@ -2,6 +2,7 @@ import { Copy01Icon, Tick01Icon } from "@hugeicons/core-free-icons";
 import { HugeiconsIcon } from "@hugeicons/react";
 import { useState } from "react";
 
+import { Tooltip } from "@/components/ui/Tooltip";
 import { cn } from "@/lib/utils";
 import { truncateAddress } from "@/lib/utils";
 
@@ -58,36 +59,38 @@ export function AddressDisplay({
 
   const addressSpan = (
     <div className="flex items-center gap-2 group">
-      <span
-        data-address
-        className={cn(
-          "break-all leading-relaxed",
-          text,
-          mono && "font-mono",
-          showFull && "select-all",
-        )}
-        title={address}
-      >
-        {display}
-      </span>
-      <button
-        onClick={copy}
-        aria-label={copied ? "Address copied" : "Copy address"}
-        className={cn(
-          "shrink-0 p-1 rounded-md transition-all",
-          copied
-            ? "text-green bg-success-dim"
-            : "text-ink-3 hover:text-ink-2 hover:bg-surface-2 opacity-50 hover:opacity-100",
-        )}
-        title={copied ? "Copied!" : "Copy address"}
-      >
-        <HugeiconsIcon
-          icon={copied ? Tick01Icon : Copy01Icon}
-          size={iconSize}
-          color="currentColor"
-          strokeWidth={2}
-        />
-      </button>
+      <Tooltip content={address}>
+        <span
+          data-address
+          className={cn(
+            "break-all leading-relaxed",
+            text,
+            mono && "font-mono",
+            showFull && "select-all",
+          )}
+        >
+          {display}
+        </span>
+      </Tooltip>
+      <Tooltip content={copied ? "Copied!" : "Copy address"}>
+        <button
+          onClick={copy}
+          aria-label={copied ? "Address copied" : "Copy address"}
+          className={cn(
+            "shrink-0 p-1 rounded-md transition-all",
+            copied
+              ? "text-green bg-success-dim"
+              : "text-ink-3 hover:text-ink-2 hover:bg-surface-2 opacity-50 hover:opacity-100",
+          )}
+        >
+          <HugeiconsIcon
+            icon={copied ? Tick01Icon : Copy01Icon}
+            size={iconSize}
+            color="currentColor"
+            strokeWidth={2}
+          />
+        </button>
+      </Tooltip>
     </div>
   );
 
diff --git a/src/components/AssetFilter.tsx b/src/components/AssetFilter.tsx
index ff2a515..46986bc 100644
--- a/src/components/AssetFilter.tsx
+++ b/src/components/AssetFilter.tsx
@@ -789,6 +789,6 @@ function AssetFilter({
   );
 }
 
-export { AssetFilter, AssetFilterSkeleton };
+export { AssetFilter };
 export type { AssetItem, AssetMeta, SortKey, VerifiedFilter };
 
diff --git a/src/components/FeeEstimator.test.tsx b/src/components/FeeEstimator.test.tsx
index 07c610d..b28795f 100644
--- a/src/components/FeeEstimator.test.tsx
+++ b/src/components/FeeEstimator.test.tsx
@@ -72,7 +72,7 @@ describe("FeeEstimator", () => {
     // Wait for initial load to complete
     await waitFor(() => expect(screen.getByText("100")).toBeInTheDocument());
 
-    const refreshButton = screen.getByTitle("Refresh");
+    const refreshButton = screen.getByRole("button", { name: "Refresh fee estimate" });
     fireEvent.click(refreshButton);
 
     await waitFor(() => expect(estimateFee).toHaveBeenCalledTimes(2));
@@ -87,7 +87,7 @@ describe("FeeEstimator", () => {
     } as unknown as SorokitClient);
 
     render(<FeeEstimator />);
-    const refreshButton = screen.getByTitle("Refresh");
+    const refreshButton = screen.getByRole("button", { name: "Refresh fee estimate" });
     expect(refreshButton).toBeDisabled();
   });
 
diff --git a/src/components/FeeEstimator.tsx b/src/components/FeeEstimator.tsx
index c5c5d54..e7cae93 100644
--- a/src/components/FeeEstimator.tsx
+++ b/src/components/FeeEstimator.tsx
@@ -3,6 +3,7 @@ import { HugeiconsIcon } from "@hugeicons/react";
 import { useCallback, useEffect, useState } from "react";
 
 import { Badge } from "@/components/ui/Badge";
+import { Tooltip } from "@/components/ui/Tooltip";
 import { getClient } from "@/lib/client";
 import { cn } from "@/lib/utils";
 
@@ -102,21 +103,22 @@ export function FeeEstimator({
                 Current Stellar base fee estimate
               </p>
             </div>
-            <button
-              onClick={() => void load()}
-              disabled={loading}
-              className="p-1.5 rounded-lg hover:bg-surface-2 text-ink-3 hover:text-ink-2 transition-colors disabled:opacity-40"
-              title="Refresh"
-              aria-label="Refresh fee estimate"
-            >
-              <HugeiconsIcon
-                icon={Refresh01Icon}
-                size={14}
-                color="currentColor"
-                strokeWidth={1.5}
-                className={loading ? "animate-spin" : ""}
-              />
-            </button>
+            <Tooltip content="Refresh">
+              <button
+                onClick={() => void load()}
+                disabled={loading}
+                className="p-1.5 rounded-lg hover:bg-surface-2 text-ink-3 hover:text-ink-2 transition-colors disabled:opacity-40"
+                aria-label="Refresh fee estimate"
+              >
+                <HugeiconsIcon
+                  icon={Refresh01Icon}
+                  size={14}
+                  color="currentColor"
+                  strokeWidth={1.5}
+                  className={loading ? "animate-spin" : ""}
+                />
+              </button>
+            </Tooltip>
           </div>
 
           <div className="px-5 py-4" aria-live="polite" aria-atomic="true">
diff --git a/src/index.css b/src/index.css
index 276a70b..61fbb74 100644
--- a/src/index.css
+++ b/src/index.css
@@ -3,35 +3,41 @@
 @import "tailwindcss";
 
 /* ─────────────────────────────────────────────────────────
-   BRAND & DESIGN TOKENS
+   Design Token Reference
+   Design Token Reference & Usage Context
+   
    Edit values here — they propagate to every component.
    Components reference these as: bg-brand, text-ink, border-line, etc.
 
-   ## Design Tokens
-
-   Naming convention: `--color-<group>[-<step>]`. Lower step numbers (or no
-   suffix) are the most prominent/high-contrast value in a group; higher
-   numbers step down in emphasis. Utility classes mirror the token name
-   1:1 (e.g. `--color-ink-3` → `.text-ink-3`), so when adding a component
-   prefer an existing token/utility pair over a one-off hex value — that
-   keeps the palette (and the light-theme override below) authoritative.
+   | Token | Default Value | Intended Usage Context |
+   | :--- | :--- | :--- |
+   | `--color-brand` | `#55852b` | Primary brand/action color for buttons, active tabs, primary highlights |
+   | `--color-brand-hover` | `#426625` | Hover and active pressed states for primary brand buttons |
+   | `--color-brand-dim` | `#17260d` | Subtle background tint for brand highlighted elements |
+   | `--color-base` | `#0d0d0d` | Main application page background |
+   | `--color-surface` | `#141414` | Primary container surfaces: cards, sidebars, topbar header |
+   | `--color-surface-2` | `#1c1c1c` | Secondary surfaces: input backgrounds, button hover states, tooltips, dropdowns |
+   | `--color-surface-3` | `#1e1e1e` | Tertiary surfaces: active navigation items, subtle card sub-sections |
+   | `--color-line` | `#2a2a2a` | Default border for cards, inputs, and layout dividers |
+   | `--color-line-2` | `#333333` | Stronger border variant for hover states, focus states, scrollbars, active outlines |
+   | `--color-ink` | `#ebebeb` | Primary high-contrast text and primary icons |
+   | `--color-ink-2` | `#999999` | Secondary text for labels, descriptions, and address monospace text |
+   | `--color-ink-3` | `#555555` | Muted text for subtle hints, disabled states, and metadata |
+   | `--color-ink-4` | `#3a3a3a` | Very muted text for section headers, inactive indicators, and subtle dividers |
+   | `--color-green` | `#22c55e` | Success status accent, positive balance changes |
+   | `--color-orange` | `#f97316` | Warning status accent, pending transactions |
+   | `--color-red` | `#ef4444` | Error status accent, negative alerts, destructive actions |
+   | `--color-teal` | `#14b8a6` | Info accent, contract event indicators |
+   | `--color-purple` | `#a855f7` | Special status accent, governance badges |
+   | `--color-success-bg` | `rgba(34, 197, 94, 0.1)` | Tinted success banner/card background |
+   | `--color-error-bg` | `rgba(239, 68, 68, 0.1)` | Tinted error banner/card background |
+   | `--color-qr-canvas-bg` | `#ffffff` | Fixed light background for QR code canvas contrast |
+   | `--color-qr-canvas-fg` | `#0d0d0d` | Fixed dark foreground for QR code canvas contrast |
+ ───────────────────────────────────────────────────────── */
+:root {
+  color-scheme: dark;
 
-   Token groups:
-   - Brand      (`--color-brand*`)   e.g. --color-brand: #55852b
-     Primary action color — buttons, links, active states.
-   - Surfaces   (`--color-base`, `--color-surface*`)  e.g. --color-surface: #141414
-     Background layers, darkest (base) to lightest (surface-3).
-   - Borders    (`--color-line*`)    e.g. --color-line: #2a2a2a
-     Dividers and outlines; `-2` is the stronger/active variant.
-   - Text       (`--color-ink*`)     e.g. --color-ink: #ebebeb
-     Foreground text, from primary (`ink`) to most muted (`ink-4`).
-   - Semantic   (`--color-green|orange|red|teal|purple`)
-     Status accents used for badges, icons, and inline indicators.
-   - State bg/border (`--color-success-*`, `--color-error-*`)
-     Tinted backgrounds/borders for success and error UI (banners, inputs).
-   - QR canvas  (`--color-qr-canvas-*`)
-     Fixed light-on-dark colors for the QR code canvas; not part of the
-     dark/light palette swap since QR codes need consistent contrast.
+  /* ── Brand ── */lette swap since QR codes need consistent contrast.
 ───────────────────────────────────────────────────────── */
 :root {
   /* ── Brand ── */