diff --git a/bun.lock b/bun.lock
index 9525f19..cb0bdce 100644
--- a/bun.lock
+++ b/bun.lock
@@ -9,7 +9,7 @@
         "@modelcontextprotocol/sdk": "^1.32.1",
         "@moduletrace/bun-sqlite": "^1.3.0",
         "@moduletrace/bunext": "^1.3.3",
-        "@moduletrace/twui": "^0.1.6",
+        "@moduletrace/twui": "^0.1.7",
         "@tiptap/extension-bubble-menu": "3.32.0",
         "@tiptap/extension-mention": "3.32.0",
         "@tiptap/extension-placeholder": "3.32.0",
@@ -255,7 +255,7 @@
 
     "@moduletrace/bunext": ["@moduletrace/bunext@1.3.3", "https://git.tben.me/api/packages/Moduletrace/npm/%40moduletrace%2Fbunext/-/1.3.3/bunext-1.3.3.tgz", { "dependencies": { "@tailwindcss/postcss": "^4.3.3", "@types/bun": "1.3.14", "@types/node": "^24.10.0", "@types/react": "^19.3.0", "@types/react-dom": "^19.3.0", "bun-plugin-tailwind": "^0.1.2", "chalk": "^5.6.2", "chokidar": "^5.0.0", "commander": "^14.0.2", "esbuild": "^0.28.2", "lightningcss-wasm": "^1.32.0", "lodash": "^4.18.1", "ora": "^9.0.0", "postcss": "^8.5.30", "react": "^19.3.0", "react-dom": "^19.3.0", "tailwindcss": "^4.3.3", "typescript": "^5.0.0", "uuid": "^14.0.2" }, "bin": { "bunext": "dist/commands/index.js" } }, "sha512-bbUtQaigsDPUQf6vtDOSCo8GYR7Gnw2ny1Fi3JtUnKsYsYQEcEadzmqntAgf7rLcKc12dadDUgFLxru+jiA92g=="],
 
-    "@moduletrace/twui": ["@moduletrace/twui@0.1.6", "https://git.tben.me/api/packages/Moduletrace/npm/%40moduletrace%2Ftwui/-/0.1.6/twui-0.1.6.tgz", { "dependencies": { "lodash": "^4.18.1", "tailwind-merge": "^3.7.0" }, "peerDependencies": { "ace-builds": "^1.40.0", "lucide-react": ">=0.577.0", "next-mdx-remote": "^6.0.0", "openai": ">=6.0.0", "react": ">=18", "react-dom": ">=18", "react-markdown": ">=9.0.0", "rehype-prism-plus": "^2.0.0", "remark-gfm": "^4.0.0", "tailwindcss": "^4" }, "optionalPeers": ["ace-builds", "next-mdx-remote", "openai", "react-markdown", "rehype-prism-plus", "remark-gfm"] }, "sha512-BFNIV1itkIYXmhq1rBJA8E8MjwN9AP7MESbOnzM0yUb6xbsOFIBbmlKfUu6kTr7QCl1TWNxWTGFPVmQ2S54cDA=="],
+    "@moduletrace/twui": ["@moduletrace/twui@0.1.7", "https://git.tben.me/api/packages/Moduletrace/npm/%40moduletrace%2Ftwui/-/0.1.7/twui-0.1.7.tgz", { "dependencies": { "lodash": "^4.18.1", "tailwind-merge": "^3.7.0" }, "peerDependencies": { "ace-builds": "^1.40.0", "lucide-react": ">=0.577.0", "next-mdx-remote": "^6.0.0", "openai": ">=6.0.0", "react": ">=18", "react-dom": ">=18", "react-markdown": ">=9.0.0", "rehype-prism-plus": "^2.0.0", "remark-gfm": "^4.0.0", "tailwindcss": "^4" }, "optionalPeers": ["ace-builds", "next-mdx-remote", "openai", "react-markdown", "rehype-prism-plus", "remark-gfm"] }, "sha512-/Y9QyhtQsoEAJO+ahlGYQaYMx3gUWS+DlSkaBVjAIY5V9OQ6i7qhhqMNcmnfOi9m3eyAze1uW00jox+RDUqLpA=="],
 
     "@next/mdx": ["@next/mdx@16.3.0", "", { "dependencies": { "source-map": "^0.7.0" }, "peerDependencies": { "@mdx-js/loader": ">=0.15.0", "@mdx-js/react": ">=0.15.0" }, "optionalPeers": ["@mdx-js/loader", "@mdx-js/react"] }, "sha512-Vpfuf928ACvx4AOdDXWx/cj13Ak6xlvMn3QCkjvfQMmLnQWCesQTeY01CPDbIyZvjY+NOwP7bvbvJ2ghkj/3GA=="],
 
diff --git a/package.json b/package.json
index 7ee0c8c..54ac4b4 100644
--- a/package.json
+++ b/package.json
@@ -45,7 +45,7 @@
         "@modelcontextprotocol/sdk": "^1.32.1",
         "@moduletrace/bun-sqlite": "^1.3.0",
         "@moduletrace/bunext": "^1.3.3",
-        "@moduletrace/twui": "^0.1.6",
+        "@moduletrace/twui": "^0.1.7",
         "@tiptap/extension-bubble-menu": "3.32.0",
         "@tiptap/extension-mention": "3.32.0",
         "@tiptap/extension-placeholder": "3.32.0",
diff --git a/src/pages/admin/usage/(data)/usage-table-columns.ts b/src/pages/admin/usage/(data)/usage-table-columns.ts
new file mode 100644
index 0000000..0c44141
--- /dev/null
+++ b/src/pages/admin/usage/(data)/usage-table-columns.ts
@@ -0,0 +1,12 @@
+/**
+ * The column tracks of the models table, shared by its heading and every
+ * row, so a figure always sits under its own heading whatever its width.
+ * The table never gets narrower than its columns: it scrolls instead.
+ */
+export const UsageModelColumns =
+    "grid grid-cols-[minmax(160px,1fr)_48px_56px_56px_64px_64px_64px] min-w-[620px]";
+
+/**
+ * The column tracks of the breakdown by kind of call, the same way.
+ */
+export const UsageHarnessColumns = "grid grid-cols-[minmax(0,1fr)_40px_72px_64px]";
diff --git a/src/pages/admin/usage/(partials)/usage-day-bar.tsx b/src/pages/admin/usage/(partials)/usage-day-bar.tsx
index 38540c7..2df1b05 100644
--- a/src/pages/admin/usage/(partials)/usage-day-bar.tsx
+++ b/src/pages/admin/usage/(partials)/usage-day-bar.tsx
@@ -1,39 +1,44 @@
+import Popover from "@moduletrace/twui/elements/Popover";
 import Stack from "@moduletrace/twui/layout/Stack";
 import { twMerge } from "tailwind-merge";
-import dayjs from "dayjs";
 import type { UsageOverview } from "@/src/types";
-import formatTokens from "@/src/utils/format-tokens";
 import { usageBarHeight } from "../(data)/usage-bar-heights";
+import UsageDaySummary from "./usage-day-summary";
 
 type Props = {
     day: UsageOverview["days"][number];
     max: number;
+    /**
+     * Every day's tokens in the period, for the day's share.
+     */
+    total_tokens: number;
 };
 
 /**
- * One day's bar in the chart: its tokens above nothing, the bar itself,
- * and the title spells the day out with what it spent. Hovering it shows
- * that title.
+ * One day's bar in the chart. Hovering it (or tapping it) opens a small
+ * card above it summing the day up.
  */
-export default function UsageDayBar({ day, max }: Props) {
-    const title = `${dayjs(day.at).format("ddd, MMM D")}: ${formatTokens({ tokens: day.total_tokens })} tokens, ${daysCalls({ calls: day.calls })}`;
-
+export default function UsageDayBar({ day, max, total_tokens }: Props) {
     return (
-        <Stack
-            title={title}
-            className="grow basis-[3px] min-w-[3px] max-w-10 h-24 justify-end items-stretch gap-0!"
+        <Popover
+            trigger="hover"
+            position="top"
+            debounce={80}
+            targetWrapperProps={{
+                className: "grow basis-[3px] min-w-[3px] max-w-10 h-24 flex flex-col justify-end cursor-pointer group",
+            }}
+            target={
+                <Stack
+                    className={twMerge(
+                        "w-full gap-0! rounded-t-[2px] transition-opacity",
+                        day.total_tokens ? "bg-ink group-hover:opacity-70" : "bg-hairline group-hover:bg-hairline-strong",
+                        usageBarHeight({ value: day.total_tokens, max }),
+                    )}
+                />
+            }
+            className="w-56 p-3 gap-2! bg-surface dark:bg-surface border-hairline dark:border-hairline rounded-default shadow-popover"
         >
-            <Stack
-                className={twMerge(
-                    "w-full rounded-t-[2px]",
-                    day.total_tokens ? "bg-ink" : "bg-hairline",
-                    usageBarHeight({ value: day.total_tokens, max }),
-                )}
-            />
-        </Stack>
+            <UsageDaySummary day={day} total_tokens={total_tokens} />
+        </Popover>
     );
 }
-
-function daysCalls({ calls }: { calls: number }) {
-    return `${calls} ${calls == 1 ? "call" : "calls"}`;
-}
diff --git a/src/pages/admin/usage/(partials)/usage-day-chart.tsx b/src/pages/admin/usage/(partials)/usage-day-chart.tsx
index 3457a76..0187e5f 100644
--- a/src/pages/admin/usage/(partials)/usage-day-chart.tsx
+++ b/src/pages/admin/usage/(partials)/usage-day-chart.tsx
@@ -13,10 +13,12 @@ type Props = {
 
 /**
  * The period day by day, one bar a day, so a spike or a quiet stretch is
- * read at a glance. The busiest day's total labels the top.
+ * read at a glance. The busiest day's total labels the top, and each bar
+ * opens a small summary of its day.
  */
 export default function UsageDayChart({ days }: Props) {
     const max = days.reduce((highest, day) => Math.max(highest, day.total_tokens), 0);
+    const total_tokens = days.reduce((total, day) => total + day.total_tokens, 0);
     const first = days[0];
     const last = days[days.length - 1];
 
@@ -30,9 +32,9 @@ export default function UsageDayChart({ days }: Props) {
             }
         >
             <Stack className="w-full gap-2!">
-                <Row className="w-full gap-1! items-end">
+                <Row className="w-full gap-1! flex-nowrap items-end">
                     {days.map((day) => (
-                        <UsageDayBar day={day} max={max} key={day.at} />
+                        <UsageDayBar day={day} max={max} total_tokens={total_tokens} key={day.at} />
                     ))}
                 </Row>
                 {first && last ? (
diff --git a/src/pages/admin/usage/(partials)/usage-day-summary.tsx b/src/pages/admin/usage/(partials)/usage-day-summary.tsx
new file mode 100644
index 0000000..06db4c0
--- /dev/null
+++ b/src/pages/admin/usage/(partials)/usage-day-summary.tsx
@@ -0,0 +1,49 @@
+import Span from "@moduletrace/twui/layout/Span";
+import Stack from "@moduletrace/twui/layout/Stack";
+import dayjs from "dayjs";
+import type { UsageOverview } from "@/src/types";
+import formatTokens from "@/src/utils/format-tokens";
+import UsageSummaryLine from "./usage-summary-line";
+
+type Props = {
+    day: UsageOverview["days"][number];
+    /**
+     * Every day's tokens in the period, for the day's share.
+     */
+    total_tokens: number;
+};
+
+/**
+ * What one day spent, in the card its bar opens: the day spelled out, then
+ * its tokens, how they split, its calls, its cost and its share of the
+ * period.
+ */
+export default function UsageDaySummary({ day, total_tokens }: Props) {
+    const share = total_tokens ? Math.round((day.total_tokens / total_tokens) * 100) : 0;
+
+    const lines = [
+        { label: "Tokens", value: formatTokens({ tokens: day.total_tokens }) },
+        { label: "In", value: formatTokens({ tokens: day.prompt_tokens }) },
+        { label: "Out", value: formatTokens({ tokens: day.completion_tokens }) },
+        { label: "Model calls", value: formatTokens({ tokens: day.calls }) },
+        { label: "Cost", value: day.cost ? `$${day.cost.toFixed(2)}` : "-" },
+        { label: "Share of period", value: `${share}%` },
+    ];
+
+    return (
+        <Stack className="w-full gap-2! items-stretch">
+            <Span className="text-[13px] leading-5 font-bold text-ink">
+                {dayjs(day.at).format("dddd, MMM D")}
+            </Span>
+            {day.calls ? (
+                <Stack className="w-full gap-1! items-stretch">
+                    {lines.map((line) => (
+                        <UsageSummaryLine {...line} key={line.label} />
+                    ))}
+                </Stack>
+            ) : (
+                <Span className="text-[12px] leading-4 text-ink-secondary">No model calls.</Span>
+            )}
+        </Stack>
+    );
+}
diff --git a/src/pages/admin/usage/(partials)/usage-harness-breakdown.tsx b/src/pages/admin/usage/(partials)/usage-harness-breakdown.tsx
index 3c8b3e7..7d35eaa 100644
--- a/src/pages/admin/usage/(partials)/usage-harness-breakdown.tsx
+++ b/src/pages/admin/usage/(partials)/usage-harness-breakdown.tsx
@@ -3,7 +3,9 @@ import Row from "@moduletrace/twui/layout/Row";
 import Span from "@moduletrace/twui/layout/Span";
 import Stack from "@moduletrace/twui/layout/Stack";
 import type { UsageOverview } from "@/src/types";
+import { twMerge } from "tailwind-merge";
 import SettingsGroup from "@/src/pages/admin/settings/(partials)/settings-group";
+import { UsageHarnessColumns } from "../(data)/usage-table-columns";
 import sumTokens from "../(functions)/sum-tokens";
 import UsageHarnessRow from "./usage-harness-row";
 
@@ -32,17 +34,22 @@ export default function UsageHarnessBreakdown({ rows }: Props) {
     return (
         <SettingsGroup title="By kind of call" description="Where the period's tokens went.">
             <Stack className="w-full gap-0!">
-                <Row className="w-full pb-2 gap-3! items-center border-0 border-b border-solid border-hairline">
-                    <Span className="text-[11px] uppercase tracking-wide text-ink-secondary grow">
+                <Row
+                    className={twMerge(
+                        UsageHarnessColumns,
+                        "w-full pb-2 gap-3! items-center border-0 border-b border-solid border-hairline",
+                    )}
+                >
+                    <Span className="text-[11px] uppercase tracking-wide text-ink-secondary">
                         Kind
                     </Span>
-                    <Span className="text-[11px] uppercase tracking-wide text-ink-secondary w-10 text-right">
+                    <Span className="text-[11px] uppercase tracking-wide text-ink-secondary text-right">
                         Share
                     </Span>
-                    <Span className="text-[11px] uppercase tracking-wide text-ink-secondary w-20 text-right">
+                    <Span className="text-[11px] uppercase tracking-wide text-ink-secondary text-right">
                         Tokens
                     </Span>
-                    <Span className="text-[11px] uppercase tracking-wide text-ink-secondary w-16 text-right">
+                    <Span className="text-[11px] uppercase tracking-wide text-ink-secondary text-right">
                         Cost
                     </Span>
                 </Row>
diff --git a/src/pages/admin/usage/(partials)/usage-harness-row.tsx b/src/pages/admin/usage/(partials)/usage-harness-row.tsx
index 77bcf99..5bbdfcf 100644
--- a/src/pages/admin/usage/(partials)/usage-harness-row.tsx
+++ b/src/pages/admin/usage/(partials)/usage-harness-row.tsx
@@ -1,8 +1,10 @@
 import Row from "@moduletrace/twui/layout/Row";
 import Span from "@moduletrace/twui/layout/Span";
+import { twMerge } from "tailwind-merge";
 import type { UsageOverview } from "@/src/types";
 import formatTokens from "@/src/utils/format-tokens";
 import { UsageHarnessTitles } from "../(data)/usage-harness-titles";
+import { UsageHarnessColumns } from "../(data)/usage-table-columns";
 
 type Props = {
     row: UsageOverview["by_harness"][number];
@@ -20,17 +22,22 @@ export default function UsageHarnessRow({ row, total_tokens }: Props) {
     const share = total_tokens ? Math.round((row.total_tokens / total_tokens) * 100) : 0;
 
     return (
-        <Row className="w-full py-2 gap-3! items-center border-0 border-b border-solid border-hairline last:border-b-0">
-            <Span className="text-[13px] leading-5 text-ink grow min-w-0 truncate">
+        <Row
+            className={twMerge(
+                UsageHarnessColumns,
+                "w-full py-2 gap-3! items-center border-0 border-b border-solid border-hairline last:border-b-0",
+            )}
+        >
+            <Span className="text-[13px] leading-5 text-ink min-w-0 truncate">
                 {UsageHarnessTitles[row.harness] || row.harness}
             </Span>
-            <Span className="text-[12px] leading-4 text-ink-secondary tabular-nums w-10 text-right">
+            <Span className="text-[12px] leading-4 text-ink-secondary tabular-nums text-right truncate">
                 {share}%
             </Span>
-            <Span className="text-[13px] leading-5 text-ink tabular-nums w-20 text-right">
+            <Span className="text-[13px] leading-5 text-ink tabular-nums text-right truncate">
                 {formatTokens({ tokens: row.total_tokens })}
             </Span>
-            <Span className="text-[12px] leading-4 text-ink-secondary tabular-nums w-16 text-right">
+            <Span className="text-[12px] leading-4 text-ink-secondary tabular-nums text-right truncate">
                 {row.cost ? `$${row.cost.toFixed(2)}` : "-"}
             </Span>
         </Row>
diff --git a/src/pages/admin/usage/(partials)/usage-model-head-cell.tsx b/src/pages/admin/usage/(partials)/usage-model-head-cell.tsx
index 5a34d38..61c2793 100644
--- a/src/pages/admin/usage/(partials)/usage-model-head-cell.tsx
+++ b/src/pages/admin/usage/(partials)/usage-model-head-cell.tsx
@@ -13,7 +13,7 @@ export default function UsageModelHeadCell({ title, className }: Props) {
     return (
         <Span
             className={twMerge(
-                "text-[11px] uppercase tracking-wide text-ink-secondary text-right shrink-0",
+                "text-[11px] uppercase tracking-wide text-ink-secondary text-right truncate",
                 className,
             )}
         >
diff --git a/src/pages/admin/usage/(partials)/usage-model-row.tsx b/src/pages/admin/usage/(partials)/usage-model-row.tsx
index 43ef94d..5c2bfcb 100644
--- a/src/pages/admin/usage/(partials)/usage-model-row.tsx
+++ b/src/pages/admin/usage/(partials)/usage-model-row.tsx
@@ -1,9 +1,11 @@
 import Row from "@moduletrace/twui/layout/Row";
 import Span from "@moduletrace/twui/layout/Span";
 import Stack from "@moduletrace/twui/layout/Stack";
+import { twMerge } from "tailwind-merge";
 import type { UsageOverview } from "@/src/types";
 import formatTokens from "@/src/utils/format-tokens";
 import { UsageHarnessTitles } from "../(data)/usage-harness-titles";
+import { UsageModelColumns } from "../(data)/usage-table-columns";
 
 type Props = {
     row: UsageOverview["models"][number];
@@ -20,8 +22,13 @@ export default function UsageModelRow({ row }: Props) {
         : "-";
 
     return (
-        <Row className="w-full py-2.5 gap-3! items-center border-0 border-b border-solid border-hairline last:border-b-0">
-            <Stack className="grow min-w-0 gap-0!">
+        <Row
+            className={twMerge(
+                UsageModelColumns,
+                "w-full py-2.5 gap-3! items-center border-0 border-b border-solid border-hairline last:border-b-0",
+            )}
+        >
+            <Stack className="min-w-0 gap-0! items-stretch">
                 <Span className="text-[13px] leading-5 text-ink truncate" title={row.model_slug}>
                     {row.model_name || row.model_slug}
                 </Span>
@@ -29,22 +36,22 @@ export default function UsageModelRow({ row }: Props) {
                     {row.provider_name} - {UsageHarnessTitles[row.harness] || row.harness}
                 </Span>
             </Stack>
-            <Span className="text-[12px] leading-4 text-ink-secondary tabular-nums w-14 text-right">
+            <Span className="text-[12px] leading-4 text-ink-secondary tabular-nums text-right truncate">
                 {formatTokens({ tokens: row.calls })}
             </Span>
-            <Span className="text-[12px] leading-4 text-ink-secondary tabular-nums w-16 text-right">
+            <Span className="text-[12px] leading-4 text-ink-secondary tabular-nums text-right truncate">
                 {formatTokens({ tokens: row.prompt_tokens })}
             </Span>
-            <Span className="text-[12px] leading-4 text-ink-secondary tabular-nums w-16 text-right">
+            <Span className="text-[12px] leading-4 text-ink-secondary tabular-nums text-right truncate">
                 {formatTokens({ tokens: row.completion_tokens })}
             </Span>
-            <Span className="text-[13px] leading-5 text-ink tabular-nums w-16 text-right">
+            <Span className="text-[13px] leading-5 text-ink tabular-nums text-right truncate">
                 {formatTokens({ tokens: row.total_tokens })}
             </Span>
-            <Span className="text-[12px] leading-4 text-ink-secondary tabular-nums w-16 text-right">
+            <Span className="text-[12px] leading-4 text-ink-secondary tabular-nums text-right truncate">
                 {per_thousand}
             </Span>
-            <Span className="text-[12px] leading-4 text-ink-secondary tabular-nums w-14 text-right">
+            <Span className="text-[12px] leading-4 text-ink-secondary tabular-nums text-right truncate">
                 {row.cost ? `$${row.cost.toFixed(2)}` : "-"}
             </Span>
         </Row>
diff --git a/src/pages/admin/usage/(partials)/usage-models-table.tsx b/src/pages/admin/usage/(partials)/usage-models-table.tsx
index 20b41e3..2035b68 100644
--- a/src/pages/admin/usage/(partials)/usage-models-table.tsx
+++ b/src/pages/admin/usage/(partials)/usage-models-table.tsx
@@ -3,7 +3,9 @@ import Row from "@moduletrace/twui/layout/Row";
 import Span from "@moduletrace/twui/layout/Span";
 import Stack from "@moduletrace/twui/layout/Stack";
 import type { UsageOverview } from "@/src/types";
+import { twMerge } from "tailwind-merge";
 import SettingsGroup from "@/src/pages/admin/settings/(partials)/settings-group";
+import { UsageModelColumns } from "../(data)/usage-table-columns";
 import UsageModelHeadCell from "./usage-model-head-cell";
 import UsageModelRow from "./usage-model-row";
 
@@ -34,14 +36,19 @@ export default function UsageModelsTable({ rows, days }: Props) {
             description={`The models this install ran in the last ${days} days, busiest first. The price per thousand tokens is read from what the provider reported.`}
         >
             <Stack className="w-full gap-0! overflow-x-auto">
-                <Row className="w-full pb-2 gap-3! items-center border-0 border-b border-solid border-hairline min-w-[640px]">
-                    <UsageModelHeadCell className="grow text-left" title="Model" />
-                    <UsageModelHeadCell className="w-14" title="Calls" />
-                    <UsageModelHeadCell className="w-16" title="In" />
-                    <UsageModelHeadCell className="w-16" title="Out" />
-                    <UsageModelHeadCell className="w-16" title="Tokens" />
-                    <UsageModelHeadCell className="w-16" title="Per 1K" />
-                    <UsageModelHeadCell className="w-14" title="Cost" />
+                <Row
+                    className={twMerge(
+                        UsageModelColumns,
+                        "w-full pb-2 gap-3! items-center border-0 border-b border-solid border-hairline",
+                    )}
+                >
+                    <UsageModelHeadCell className="text-left" title="Model" />
+                    <UsageModelHeadCell title="Calls" />
+                    <UsageModelHeadCell title="In" />
+                    <UsageModelHeadCell title="Out" />
+                    <UsageModelHeadCell title="Tokens" />
+                    <UsageModelHeadCell title="Per 1K" />
+                    <UsageModelHeadCell title="Cost" />
                 </Row>
                 {rows.map((row) => (
                     <UsageModelRow
diff --git a/src/pages/admin/usage/(partials)/usage-range-button.tsx b/src/pages/admin/usage/(partials)/usage-range-button.tsx
new file mode 100644
index 0000000..4abd2f1
--- /dev/null
+++ b/src/pages/admin/usage/(partials)/usage-range-button.tsx
@@ -0,0 +1,39 @@
+import Button from "@moduletrace/twui/layout/Button";
+import { twMerge } from "tailwind-merge";
+import type { UsageRange } from "../(data)/usage-ranges";
+
+type Props = {
+    range: UsageRange;
+    selected: boolean;
+    loading?: boolean;
+    onChange: (days: number) => void;
+};
+
+/**
+ * One period of the range picker: ink-filled while it is the one showing,
+ * quiet otherwise.
+ */
+export default function UsageRangeButton({ range, selected, loading, onChange }: Props) {
+    return (
+        <Button
+            title={range.title}
+            type="button"
+            size="small"
+            variant="ghost"
+            color="text"
+            aria-pressed={selected}
+            disabled={loading && !selected}
+            onClick={() => {
+                if (!selected) onChange(range.days);
+            }}
+            className={twMerge(
+                "px-2.5! py-1! text-[12px]! rounded-default-xs",
+                selected
+                    ? "bg-ink dark:bg-ink hover:bg-ink dark:hover:bg-ink text-on-ink dark:text-on-ink cursor-default"
+                    : "text-ink-secondary dark:text-ink-secondary hover:bg-ink/5 dark:hover:bg-ink/5 hover:text-ink dark:hover:text-ink",
+            )}
+        >
+            {range.title}
+        </Button>
+    );
+}
diff --git a/src/pages/admin/usage/(partials)/usage-range-picker.tsx b/src/pages/admin/usage/(partials)/usage-range-picker.tsx
index 82742b9..6cd4a1f 100644
--- a/src/pages/admin/usage/(partials)/usage-range-picker.tsx
+++ b/src/pages/admin/usage/(partials)/usage-range-picker.tsx
@@ -1,6 +1,6 @@
-import Button from "@moduletrace/twui/layout/Button";
 import Row from "@moduletrace/twui/layout/Row";
 import { UsageRanges } from "../(data)/usage-ranges";
+import UsageRangeButton from "./usage-range-button";
 
 type Props = {
     days: number;
@@ -9,26 +9,20 @@ type Props = {
 };
 
 /**
- * The periods the page totals, one button each. The one showing is the
- * one that reads as pressed.
+ * The periods the page totals, one segment each in a hairline track. The
+ * one showing is filled in ink, so it reads as pressed.
  */
 export default function UsageRangePicker({ days, loading, onChange }: Props) {
     return (
-        <Row className="gap-1! items-center">
+        <Row className="gap-0.5! p-0.5 flex-nowrap items-center rounded-default border border-solid border-hairline">
             {UsageRanges.map((range) => (
-                <Button
+                <UsageRangeButton
                     key={range.days}
-                    title={range.title}
-                    type="button"
-                    size="small"
-                    variant={range.days == days ? "outlined" : "ghost"}
-                    color="text"
-                    disabled={loading}
-                    onClick={() => onChange(range.days)}
-                    className="px-2.5! py-1! text-[12px]! rounded-default-xs"
-                >
-                    {range.title}
-                </Button>
+                    range={range}
+                    selected={range.days == days}
+                    loading={loading}
+                    onChange={onChange}
+                />
             ))}
         </Row>
     );
diff --git a/src/pages/admin/usage/(partials)/usage-summary-line.tsx b/src/pages/admin/usage/(partials)/usage-summary-line.tsx
new file mode 100644
index 0000000..fe52d68
--- /dev/null
+++ b/src/pages/admin/usage/(partials)/usage-summary-line.tsx
@@ -0,0 +1,20 @@
+import Row from "@moduletrace/twui/layout/Row";
+import Span from "@moduletrace/twui/layout/Span";
+
+type Props = {
+    label: string;
+    value: string;
+};
+
+/**
+ * One figure of a day's summary card: what it is on the left, the figure
+ * on the right.
+ */
+export default function UsageSummaryLine({ label, value }: Props) {
+    return (
+        <Row className="w-full gap-3! flex-nowrap items-center justify-between">
+            <Span className="text-[12px] leading-4 text-ink-secondary">{label}</Span>
+            <Span className="text-[12px] leading-4 text-ink tabular-nums">{value}</Span>
+        </Row>
+    );
+}