diff --git a/src/components/atoms/report-summary-bar.tsx b/src/components/atoms/report-summary-bar.tsx
index a9fd002..d2c41c8 100644
--- a/src/components/atoms/report-summary-bar.tsx
+++ b/src/components/atoms/report-summary-bar.tsx
@@ -55,19 +55,31 @@ interface ReportSummaryBarProps {
   items: SummaryItem[];
 }
 
+/**
+ * An inline `gridTemplateColumns` is unreachable by any breakpoint, so the bar
+ * kept its desktop column count on a phone and pushed the page sideways —
+ * squeezing the third tile down to its icon. Classes instead, so the count can
+ * fall to one column on a narrow screen.
+ */
+const COLUMNS_AT_WIDE: Record<number, string> = {
+  1: "lg:grid-cols-1",
+  2: "lg:grid-cols-2",
+  3: "lg:grid-cols-3",
+  4: "lg:grid-cols-4",
+  5: "lg:grid-cols-5",
+};
+
 export function ReportSummaryBar({ items }: ReportSummaryBarProps) {
+  const columns = COLUMNS_AT_WIDE[Math.min(items.length, 5)] ?? "lg:grid-cols-5";
   return (
-    <div
-      className="grid gap-4"
-      style={{ gridTemplateColumns: `repeat(${Math.min(items.length, 5)}, 1fr)` }}
-    >
+    <div className={cn("grid gap-4 grid-cols-1 sm:grid-cols-2", columns)}>
       {items.map((item) => {
         const tone = resolveTone(item);
         const Icon = item.icon;
         return (
           <div
             key={item.label}
-            className="flex items-center gap-3 rounded-lg border p-3"
+            className="flex min-w-0 items-center gap-3 rounded-lg border p-3"
           >
             {Icon && (
               <div
diff --git a/src/components/atoms/spending-chart.tsx b/src/components/atoms/spending-chart.tsx
index 91303cf..49782ce 100644
--- a/src/components/atoms/spending-chart.tsx
+++ b/src/components/atoms/spending-chart.tsx
@@ -2,6 +2,7 @@
 
 import { PieChart, Pie, Cell, BarChart, Bar, XAxis, YAxis, ResponsiveContainer, Tooltip } from "recharts";
 import { centsToDisplay } from "@/lib/money";
+import { activateOnKey } from "@/lib/a11y";
 import { CHART_COLORS } from "@/lib/chart-colors";
 
 export interface SpendingChartItem {
@@ -78,7 +79,7 @@ export function SpendingChart({ data, viewMode, onItemClick }: SpendingChartProp
             </PieChart>
           </ResponsiveContainer>
         </div>
-        <div className="w-3/5 overflow-y-auto">
+        <div className="w-3/5 overflow-y-auto overflow-x-hidden">
           {chartData.map((row, i) => (
             <SpendingLegendRow
               key={row.name}
@@ -132,9 +133,15 @@ function SpendingLegendRow({
   onClick?: () => void;
 }) {
   return (
+    // Recharts' sectors cannot take focus, so this legend is the keyboard route
+    // into the donut. An inert row (no onClick) stays out of the tab order.
     <div
-      className={`flex items-center gap-2 py-1 text-sm ${onClick ? "cursor-pointer hover:bg-muted/50 rounded px-1 -mx-1" : ""}`}
+      role={onClick ? "button" : undefined}
+      tabIndex={onClick ? 0 : undefined}
+      aria-label={onClick ? `Show ${name} transactions` : undefined}
+      className={`flex items-center gap-2 py-1 text-sm ${onClick ? "cursor-pointer hover:bg-muted/50 focus-visible:bg-muted/50 focus-visible:outline-2 focus-visible:outline-offset-[-2px] focus-visible:outline-ring rounded px-1 -mx-1" : ""}`}
       onClick={onClick}
+      onKeyDown={activateOnKey(onClick)}
     >
       <div className="w-2 h-2 rounded-full shrink-0" style={{ backgroundColor: color }} />
       <span className="truncate flex-1">{name}</span>
diff --git a/src/components/molecules/income-expense-category-table.tsx b/src/components/molecules/income-expense-category-table.tsx
index 1ad1e23..8b48ba8 100644
--- a/src/components/molecules/income-expense-category-table.tsx
+++ b/src/components/molecules/income-expense-category-table.tsx
@@ -1,6 +1,7 @@
 "use client";
 
 import { centsToDisplay } from "@/lib/money";
+import { activateOnKey } from "@/lib/a11y";
 import type { IncomeExpenseCategoryRow } from "@/queries/reports";
 import { ChevronRight } from "lucide-react";
 import { CategoryIconTile } from "@/components/atoms/category-icon";
@@ -52,10 +53,12 @@ function Section({
     );
   }
 
-  const rowClass = onCategoryClick ? "cursor-pointer group" : "hover:bg-transparent";
+  const rowClass = onCategoryClick
+    ? "cursor-pointer group focus-visible:outline-2 focus-visible:outline-offset-[-2px] focus-visible:outline-ring"
+    : "hover:bg-transparent";
 
   return (
-    <div>
+    <div className="overflow-x-auto">
       <div className="px-3 py-2 text-xs font-medium text-muted-foreground uppercase tracking-wider bg-muted/30">
         {label}
       </div>
@@ -72,8 +75,18 @@ function Section({
           {rows.map((row) => (
             <TableRow
               key={`${row.categoryId ?? "uncategorized"}-${row.isIncome}`}
+              tabIndex={onCategoryClick ? 0 : undefined}
+              role={onCategoryClick ? "button" : undefined}
+              aria-label={
+                onCategoryClick
+                  ? `Show ${row.categoryName} transactions, ${centsToDisplay(row.total)}`
+                  : undefined
+              }
               className={rowClass}
               onClick={() => onCategoryClick?.(row.categoryId, row.isIncome)}
+              onKeyDown={activateOnKey(
+                onCategoryClick ? () => onCategoryClick(row.categoryId, row.isIncome) : undefined,
+              )}
             >
               <TableCell className="px-3 py-2 flex items-center gap-2">
                 <CategoryIconTile name={row.categoryIcon} iconSize={14} className="size-6" />
diff --git a/src/components/organisms/dashboard-shell.tsx b/src/components/organisms/dashboard-shell.tsx
index f7959be..ec6e533 100644
--- a/src/components/organisms/dashboard-shell.tsx
+++ b/src/components/organisms/dashboard-shell.tsx
@@ -19,7 +19,10 @@ export function DashboardShell({ userName, userEmail, defaultOpen = true, childr
           <SidebarTrigger className="h-11 w-11" />
           <span className="text-sm font-semibold">Ledgr</span>
         </header>
-        <main className="flex-1 px-4 py-4 md:px-6 md:py-6 lg:px-8">
+        {/* The AI assistant button is `fixed bottom-6 right-6`, so it floats over
+            whatever the page ends with. Reserve its height (56px + 24px inset)
+            plus a gap, so content can always be scrolled clear of it. */}
+        <main className="flex-1 px-4 py-4 pb-24 md:px-6 md:py-6 md:pb-24 lg:px-8">
           {children}
         </main>
       </SidebarInset>
diff --git a/src/components/organisms/report-spending.tsx b/src/components/organisms/report-spending.tsx
index eb18652..7f09ccb 100644
--- a/src/components/organisms/report-spending.tsx
+++ b/src/components/organisms/report-spending.tsx
@@ -17,6 +17,7 @@ import {
   TableRow,
 } from "@/components/ui/table";
 import { centsToDisplay } from "@/lib/money";
+import { activateOnKey } from "@/lib/a11y";
 import { CHART_COLORS } from "@/lib/chart-colors";
 import type { SpendingRow } from "@/queries/reports";
 
@@ -76,7 +77,7 @@ export function ReportSpending({
         <SpendingChart data={chartData} viewMode={view} onItemClick={handleDrillDown} />
       </div>
 
-      <div className="border rounded-lg">
+      <div className="border rounded-lg overflow-x-auto">
         <Table className="text-sm">
           <TableHeader>
             <TableRow className="hover:bg-transparent text-muted-foreground">
@@ -89,8 +90,17 @@ export function ReportSpending({
             {data.map((row, i) => (
               <TableRow
                 key={row.categoryId ?? "uncategorized"}
-                className="cursor-pointer"
+                // The row is the click target for a mouse, and a focus stop for
+                // a keyboard. Without the latter, drill-down was mouse-only:
+                // every row measured tabIndex -1 with no role.
+                tabIndex={0}
+                role="button"
+                aria-label={`Show ${row.categoryName} transactions, ${centsToDisplay(row.total)}`}
+                className="cursor-pointer focus-visible:outline-2 focus-visible:outline-offset-[-2px] focus-visible:outline-ring"
                 onClick={() => handleDrillDown({ id: row.categoryId, name: row.categoryName })}
+                onKeyDown={activateOnKey(() =>
+                  handleDrillDown({ id: row.categoryId, name: row.categoryName }),
+                )}
               >
                 <TableCell className="px-3 py-2">
                   <div className="flex items-center gap-3">
diff --git a/src/components/organisms/report-tabs.tsx b/src/components/organisms/report-tabs.tsx
index 3216773..6e78b8b 100644
--- a/src/components/organisms/report-tabs.tsx
+++ b/src/components/organisms/report-tabs.tsx
@@ -80,23 +80,29 @@ export function ReportTabs({
       value={activeTab}
       onValueChange={(tab) => updateFilter("tab", tab === "spending" ? null : tab)}
     >
-      <TabsList className="h-9">
-        <TabsTrigger value="spending">
-          <PieChart /> Spending
-        </TabsTrigger>
-        <TabsTrigger value="income-expense">
-          <ArrowLeftRight /> Income vs Expense
-        </TabsTrigger>
-        <TabsTrigger value="cash-flow">
-          <Waypoints /> Cash Flow
-        </TabsTrigger>
-        <TabsTrigger value="trends">
-          <TrendingUp /> Trends
-        </TabsTrigger>
-        <TabsTrigger value="net-worth">
-          <LineChart /> Net Worth
-        </TabsTrigger>
-      </TabsList>
+      {/* Five tabs do not fit a phone. Without a scroll container the list
+          just widened the page — Trends and Net Worth sat off-screen with no
+          way to reach them, because the list itself computes
+          `overflow-x: visible`. */}
+      <div className="-mx-1 overflow-x-auto px-1 pb-1">
+        <TabsList className="h-9">
+          <TabsTrigger value="spending">
+            <PieChart /> Spending
+          </TabsTrigger>
+          <TabsTrigger value="income-expense">
+            <ArrowLeftRight /> Income vs Expense
+          </TabsTrigger>
+          <TabsTrigger value="cash-flow">
+            <Waypoints /> Cash Flow
+          </TabsTrigger>
+          <TabsTrigger value="trends">
+            <TrendingUp /> Trends
+          </TabsTrigger>
+          <TabsTrigger value="net-worth">
+            <LineChart /> Net Worth
+          </TabsTrigger>
+        </TabsList>
+      </div>
 
       <TabsContent value="spending" className="mt-4">
         {spendingData && (
diff --git a/src/components/organisms/sankey-chart.tsx b/src/components/organisms/sankey-chart.tsx
index 47f2563..9c1a2e5 100644
--- a/src/components/organisms/sankey-chart.tsx
+++ b/src/components/organisms/sankey-chart.tsx
@@ -4,6 +4,7 @@ import { useMemo, useState } from "react";
 import { sankey, sankeyLinkHorizontal } from "d3-sankey";
 import { centsToDisplay } from "@/lib/money";
 import { INCOME_COLOR, CHART_COLORS } from "@/lib/chart-colors";
+import { activateOnKey } from "@/lib/a11y";
 
 export interface SankeyNode {
   id: string;
@@ -155,12 +156,20 @@ export function SankeyChart({ nodes, links, onNodeClick, height = 400 }: SankeyC
           const clickable = onNodeClick && node.type !== "savings";
           return (
             <g key={node.id}>
+              {/* An SVG rect takes focus only with an explicit tabIndex and a
+                  role — without both, the Sankey was mouse-only. */}
               <rect
                 x={x0} y={y0}
                 width={x1 - x0} height={nodeHeight}
                 fill={color} rx={2}
-                className={clickable ? "cursor-pointer" : ""}
+                tabIndex={clickable ? 0 : undefined}
+                role={clickable ? "button" : undefined}
+                aria-label={clickable ? `Show ${node.name} transactions` : undefined}
+                className={clickable ? "cursor-pointer focus-visible:outline-2 focus-visible:outline-offset-2 focus-visible:outline-ring" : ""}
                 onClick={() => clickable && onNodeClick(node.id, node.type)}
+                onKeyDown={activateOnKey(
+                  clickable ? () => onNodeClick(node.id, node.type) : undefined,
+                )}
               />
               {nodeHeight > 12 && (
                 <text
diff --git a/src/lib/a11y.test.ts b/src/lib/a11y.test.ts
new file mode 100644
index 0000000..5321a34
--- /dev/null
+++ b/src/lib/a11y.test.ts
@@ -0,0 +1,39 @@
+import { describe, test, expect, vi } from "vitest";
+import type { KeyboardEvent } from "react";
+import { activateOnKey } from "./a11y";
+
+function keyEvent(key: string) {
+  return { key, preventDefault: vi.fn() } as unknown as KeyboardEvent & { preventDefault: ReturnType<typeof vi.fn> };
+}
+
+describe("activateOnKey", () => {
+  test("returns nothing when there is no action, so the element stays untabbable", () => {
+    expect(activateOnKey(undefined)).toBeUndefined();
+  });
+
+  test("Enter activates", () => {
+    const onActivate = vi.fn();
+    const e = keyEvent("Enter");
+    activateOnKey(onActivate)!(e);
+    expect(onActivate).toHaveBeenCalledOnce();
+    expect(e.preventDefault).toHaveBeenCalled();
+  });
+
+  test("Space activates, and does not also scroll the page", () => {
+    const onActivate = vi.fn();
+    const e = keyEvent(" ");
+    activateOnKey(onActivate)!(e);
+    expect(onActivate).toHaveBeenCalledOnce();
+    expect(e.preventDefault).toHaveBeenCalled();
+  });
+
+  test("any other key is left alone", () => {
+    const onActivate = vi.fn();
+    for (const key of ["Tab", "a", "Escape", "ArrowDown", "Spacebar"]) {
+      const e = keyEvent(key);
+      activateOnKey(onActivate)!(e);
+      expect(onActivate).not.toHaveBeenCalled();
+      expect(e.preventDefault).not.toHaveBeenCalled();
+    }
+  });
+});
diff --git a/src/lib/a11y.ts b/src/lib/a11y.ts
new file mode 100644
index 0000000..7a781a0
--- /dev/null
+++ b/src/lib/a11y.ts
@@ -0,0 +1,21 @@
+import type { KeyboardEvent } from "react";
+
+/**
+ * Enter/Space activation for an element that is clickable but is not a
+ * `<button>` — a table row, a chart legend entry.
+ *
+ * Returning `undefined` when there is nothing to activate lets a caller spread
+ * the result unconditionally: an inert row then gets no handler, and so keeps
+ * its `tabIndex` off and stays out of the tab order.
+ */
+export function activateOnKey(
+  onActivate: (() => void) | undefined,
+): ((e: KeyboardEvent) => void) | undefined {
+  if (!onActivate) return undefined;
+  return (e: KeyboardEvent) => {
+    if (e.key !== "Enter" && e.key !== " ") return;
+    // Space scrolls the page by default, which is not what pressing a control does.
+    e.preventDefault();
+    onActivate();
+  };
+}