feat: quiz

app/(app)/(reader)/transcriptions/[slug]/page.tsx

@@ -9,6 +9,7 @@ import {
 } from "@/lib/transcriptions";
 import { buildOgMeta, ogForTranscription, extractQuoteFromHl } from "@/lib/og";
 import { PageHeader } from "@/components/layout/page-header";
+import { QuizButton } from "@/components/quiz/quiz-button";
 import { Card, CardContent } from "@/components/ui/card";
 import { Badge } from "@/components/ui/badge";
 import { buttonVariants } from "@/components/ui/button";
@@ -95,6 +96,9 @@ export default async function TranscriptionPage({
       />
       <PageHeader
         sticky
+        // With audio, the quiz button sits beside the play control below
+        // instead; without it, the header shows it as on any other page.
+        quiz={!t.audioUrl}
         offline={{
           type: "transcript",
           title: t.name,
@@ -168,7 +172,8 @@ export default async function TranscriptionPage({
 
           {/* Play Audio button */}
           {t.audioUrl && (
-            <div className="w-full md:w-[25%] flex justify-end">
+            <div className="w-full md:w-auto flex flex-wrap items-center justify-end gap-2">
+              <QuizButton path={`/transcriptions/${t.slug}`} className="py-2" />
               <PlayAudioButton
                 audioUrl={t.audioUrl}
                 title={t.name}

app/(app)/page.tsx

@@ -6,6 +6,7 @@ import { useAuth } from "@/components/auth/auth-provider";
 import { SadhnaStreakCTA } from "@/components/sadhna/streak-cta";
 import { VaniOfTheDayCTA } from "@/components/vani/vani-of-the-day-cta";
 import { HomeFeed } from "@/components/feed/home-feed";
+import { QuizzesCTA } from "@/components/quiz/quizzes-cta";
 
 /**
  * / — the Home (Feed) gate.
@@ -33,9 +34,17 @@ export default function HomePage() {
       // mobile this max-width is wider than the viewport, so it's full-bleed
       // as before.
       <main className="flex-1 max-w-lg w-full mx-auto px-4 sm:px-6 py-6">
-        <div className="mb-6 flex flex-col gap-3">
-          <SadhnaStreakCTA />
-          <VaniOfTheDayCTA />
+        <div className="mb-6">
+          <div className="flex h-24 gap-3">
+            {/* A compact sādhana tile beside a wider Vāṇī of the Day: the
+                streak is a daily habit you already know how to reach, so it
+                needs only a recognisable mark; the vāṇī changes daily and
+                earns the room to say what it is. */}
+            <SadhnaStreakCTA compact />
+            <VaniOfTheDayCTA className="h-full min-w-0 max-w-none flex-1" />
+          </div>
+          {/* Only while something is left to take. */}
+          <QuizzesCTA pendingOnly className="mt-3" />
         </div>
         <HomeFeed />
       </main>
@@ -88,9 +97,17 @@ export default function HomePage() {
         </p>
 
         {/* Daily sādhana streak + Vāṇī of the day — entry points for visitors. */}
-        <div className="mt-6 w-full max-w-md flex flex-col gap-3">
-          <SadhnaStreakCTA />
-          <VaniOfTheDayCTA />
+        <div className="mt-6 w-full max-w-md">
+          <div className="flex h-24 gap-3">
+            {/* A compact sādhana tile beside a wider Vāṇī of the Day: the
+                streak is a daily habit you already know how to reach, so it
+                needs only a recognisable mark; the vāṇī changes daily and
+                earns the room to say what it is. */}
+            <SadhnaStreakCTA compact />
+            <VaniOfTheDayCTA className="h-full min-w-0 max-w-none flex-1" />
+          </div>
+          {/* Only while something is left to take. */}
+          <QuizzesCTA pendingOnly className="mt-3" />
         </div>
       </div>
     </main>

app/(app)/quizzes/[id]/page.tsx

@@ -0,0 +1,306 @@
+"use client";
+
+/**
+ * Taking a quiz: an introduction, then one question at a time, then your
+ * result.
+ *
+ * Each question is fetched from the BFF as you reach it, and the BFF starts
+ * its clock at that moment — so response times are measured server-side and
+ * reloading the page doesn't restart them. Correct answers are only revealed
+ * on the results screen, never while you're still answering.
+ *
+ * Tapping an option only selects it; the answer is sent, and becomes final,
+ * when you press Submit. Multi questions ("select all that apply") take
+ * several selections.
+ */
+
+import { useCallback, useEffect, useState } from "react";
+import Link from "next/link";
+import { useParams } from "next/navigation";
+import {
+  ArrowLeft,
+  ArrowRight,
+  Check,
+  ClipboardCheck,
+  Loader2,
+} from "lucide-react";
+import { toast } from "sonner";
+import { useAuth } from "@/components/auth/auth-provider";
+import { useAuthGate } from "@/components/auth/auth-gate";
+import { RichText } from "@/lib/rich-text";
+import {
+  quiz as quizApi,
+  quizActionLabel,
+  QuizError,
+  type QuizCard,
+  type QuizPlay,
+  type QuizResult,
+} from "@/lib/quiz";
+import { QuizResultView } from "@/components/quiz/quiz-result-view";
+import { cn } from "@/lib/utils";
+
+type Stage =
+  | { kind: "loading" }
+  | { kind: "intro"; card: QuizCard }
+  | { kind: "playing"; card: QuizCard; play: QuizPlay }
+  | { kind: "result"; card: QuizCard; result: QuizResult }
+  | { kind: "missing" };
+
+export default function QuizPage() {
+  const { id } = useParams<{ id: string }>();
+  const { user } = useAuth();
+  const { requireAuth } = useAuthGate();
+  const [stage, setStage] = useState<Stage>({ kind: "loading" });
+  const [selected, setSelected] = useState<string[]>([]);
+  const [submitting, setSubmitting] = useState(false);
+
+  // Every new question starts with nothing selected.
+  const goTo = (card: QuizCard, play: QuizPlay) => {
+    setSelected([]);
+    setStage({ kind: "playing", card, play });
+  };
+
+  const toggle = (play: QuizPlay, optionId: string) => {
+    if (submitting) return;
+    setSelected((cur) =>
+      play.question?.multi
+        ? cur.includes(optionId)
+          ? cur.filter((x) => x !== optionId)
+          : [...cur, optionId]
+        : [optionId],
+    );
+  };
+
+  const showResult = useCallback(
+    async (card: QuizCard) => {
+      const result = await quizApi.result(id);
+      setStage({ kind: "result", card, result });
+    },
+    [id],
+  );
+
+  useEffect(() => {
+    let cancelled = false;
+    quizApi
+      .get(id)
+      .then(async (card) => {
+        if (cancelled) return;
+        if (card.my.state === "completed") await showResult(card);
+        else setStage({ kind: "intro", card });
+      })
+      .catch(() => !cancelled && setStage({ kind: "missing" }));
+    return () => {
+      cancelled = true;
+    };
+    // user?.id: progress appears once you sign in.
+  }, [id, user?.id, showResult]);
+
+  const begin = async (card: QuizCard) => {
+    if (!(await requireAuth())) return;
+    try {
+      const play = await quizApi.start(id);
+      if (play.done) await showResult(card);
+      else goTo(card, play);
+    } catch (err) {
+      toast.error(
+        err instanceof QuizError ? err.message : "Could not start the quiz",
+      );
+    }
+  };
+
+  const submit = async (card: QuizCard, play: QuizPlay) => {
+    if (!play.question || submitting || selected.length === 0) return;
+    setSubmitting(true);
+    try {
+      const next = await quizApi.answer(id, play.question.id, selected);
+      if (next.done) await showResult(card);
+      else goTo(card, next);
+    } catch (err) {
+      // Most likely the question was already answered in another tab: pick up
+      // wherever the attempt actually is rather than leaving this one stuck.
+      toast.error(
+        err instanceof QuizError ? err.message : "Could not save that answer",
+      );
+      try {
+        const resumed = await quizApi.start(id);
+        if (resumed.done) await showResult(card);
+        else goTo(card, resumed);
+      } catch {
+        /* the toast already said something went wrong */
+      }
+    } finally {
+      setSubmitting(false);
+    }
+  };
+
+  return (
+    <main className="mx-auto w-full max-w-2xl flex-1 px-4 py-6 sm:px-6 sm:py-10">
+      <Link
+        href="/quizzes"
+        className="mb-4 inline-flex items-center gap-1 text-sm text-muted-foreground hover:text-foreground"
+      >
+        <ArrowLeft className="size-4" /> All quizzes
+      </Link>
+
+      {stage.kind === "loading" && (
+        <p className="text-sm text-muted-foreground">Loading…</p>
+      )}
+
+      {stage.kind === "missing" && (
+        <p className="text-sm text-muted-foreground">
+          This quiz isn&apos;t available.
+        </p>
+      )}
+
+      {(stage.kind === "intro" ||
+        stage.kind === "playing" ||
+        stage.kind === "result") && (
+        <header className="mb-6">
+          <h1 className="font-[family-name:var(--font-title)] text-2xl font-semibold text-foreground">
+            {stage.card.title}
+          </h1>
+          {stage.card.target_path && (
+            <Link
+              href={stage.card.target_path}
+              className="mt-1 inline-block text-sm text-primary hover:underline"
+            >
+              {stage.card.target_title || stage.card.target_path}
+            </Link>
+          )}
+        </header>
+      )}
+
+      {stage.kind === "intro" && (
+        <section className="space-y-5 rounded-2xl border border-border bg-card p-5">
+          {stage.card.description && (
+            <div className="text-sm leading-relaxed text-foreground">
+              <RichText text={stage.card.description} />
+            </div>
+          )}
+          <p className="text-sm text-muted-foreground">
+            {stage.card.question_count}{" "}
+            {stage.card.question_count === 1 ? "question" : "questions"}, one
+            attempt. Each answer is final once submitted, and your time on each
+            question is recorded.
+          </p>
+          {stage.card.my.state === "in_progress" && (
+            <p className="text-sm text-muted-foreground">
+              You&apos;ve answered {stage.card.my.answered} of{" "}
+              {stage.card.my.total}.
+            </p>
+          )}
+          <button
+            type="button"
+            onClick={() => void begin(stage.card)}
+            className="inline-flex items-center gap-2 rounded-lg bg-primary px-4 py-2 text-sm font-medium text-primary-foreground hover:bg-primary/90 dark:text-white"
+          >
+            <ClipboardCheck className="size-4" />
+            {user
+              ? quizActionLabel(stage.card.my.state)
+              : "Sign in to take the quiz"}
+          </button>
+        </section>
+      )}
+
+      {stage.kind === "playing" && stage.play.question && (
+        <section className="space-y-5">
+          <div>
+            <div className="mb-1.5 flex justify-between text-xs text-muted-foreground">
+              <span>
+                Question {stage.play.answered + 1} of {stage.play.total}
+              </span>
+            </div>
+            <div className="h-1.5 overflow-hidden rounded-full bg-muted">
+              <div
+                className="h-full rounded-full bg-primary transition-all"
+                style={{
+                  width: `${(stage.play.answered / stage.play.total) * 100}%`,
+                }}
+              />
+            </div>
+          </div>
+
+          <div>
+            <p className="text-lg leading-relaxed text-foreground">
+              <RichText text={stage.play.question.prompt} />
+            </p>
+            <p className="mt-1 text-xs text-muted-foreground">
+              {stage.play.question.multi
+                ? "Select all that apply"
+                : "Select one answer"}
+            </p>
+          </div>
+
+          <ul
+            className="space-y-2"
+            role={stage.play.question.multi ? "group" : "radiogroup"}
+          >
+            {stage.play.question.options.map((o) => {
+              const on = selected.includes(o.id);
+              const multi = stage.play.question?.multi;
+              return (
+                <li key={o.id}>
+                  <button
+                    type="button"
+                    role={multi ? "checkbox" : "radio"}
+                    aria-checked={on}
+                    disabled={submitting}
+                    onClick={() => toggle(stage.play, o.id)}
+                    className={cn(
+                      "flex w-full items-center gap-3 rounded-xl border px-4 py-3 text-left text-sm transition-colors",
+                      on
+                        ? "border-primary bg-primary/10"
+                        : "border-border bg-card hover:border-primary/40 hover:bg-muted/40",
+                      "disabled:cursor-default",
+                    )}
+                  >
+                    {/* Radio dot for one answer, checkbox for several. */}
+                    <span
+                      aria-hidden
+                      className={cn(
+                        "flex size-4 shrink-0 items-center justify-center border transition-colors",
+                        multi ? "rounded" : "rounded-full",
+                        on
+                          ? "border-primary bg-primary text-primary-foreground"
+                          : "border-muted-foreground/40",
+                      )}
+                    >
+                      {on &&
+                        (multi ? (
+                          <Check className="size-3" strokeWidth={3} />
+                        ) : (
+                          <span className="size-1.5 rounded-full bg-primary-foreground" />
+                        ))}
+                    </span>
+                    <span className="min-w-0 flex-1">
+                      <RichText text={o.body} />
+                    </span>
+                  </button>
+                </li>
+              );
+            })}
+          </ul>
+
+          <div className="flex justify-end">
+            <button
+              type="button"
+              disabled={selected.length === 0 || submitting}
+              onClick={() => void submit(stage.card, stage.play)}
+              className="inline-flex items-center gap-2 rounded-lg bg-primary px-5 py-2 text-sm font-medium text-primary-foreground hover:bg-primary/90 disabled:opacity-50 dark:text-white"
+            >
+              {submitting && <Loader2 className="size-4 animate-spin" />}
+              {stage.play.answered + 1 === stage.play.total
+                ? "Submit and finish"
+                : "Next question"}
+              {!submitting && stage.play.answered + 1 < stage.play.total && (
+                <ArrowRight className="size-4" />
+              )}
+            </button>
+          </div>
+        </section>
+      )}
+
+      {stage.kind === "result" && <QuizResultView result={stage.result} />}
+    </main>
+  );
+}

app/(app)/quizzes/page.tsx

@@ -0,0 +1,147 @@
+"use client";
+
+/**
+ * /quizzes — every published quiz, with where you are in each.
+ *
+ * Reached from the Quizzes card on the search page. Quizzes are deliberately
+ * not in search results: they're something to do, not something to look up.
+ */
+
+import { useEffect, useMemo, useState } from "react";
+import Link from "next/link";
+import { ClipboardCheck } from "lucide-react";
+import { useAuth } from "@/components/auth/auth-provider";
+import { quiz, quizActionLabel, type QuizCard } from "@/lib/quiz";
+import { cn } from "@/lib/utils";
+
+const KIND: Record<QuizCard["target_kind"], string> = {
+  chapter: "Book chapter",
+  lecture: "Lecture",
+  conversation: "Conversation",
+  standalone: "Quiz",
+};
+
+type Filter = "all" | "todo" | "done";
+
+export default function QuizzesPage() {
+  const { user } = useAuth();
+  const [list, setList] = useState<QuizCard[] | null>(null);
+  const [filter, setFilter] = useState<Filter>("all");
+
+  useEffect(() => {
+    let cancelled = false;
+    quiz
+      .list()
+      .then((l) => !cancelled && setList(l))
+      .catch(() => !cancelled && setList([]));
+    return () => {
+      cancelled = true;
+    };
+  }, [user?.id]);
+
+  const shown = useMemo(
+    () =>
+      (list ?? []).filter((q) =>
+        filter === "all"
+          ? true
+          : filter === "done"
+            ? q.my.state === "completed"
+            : q.my.state !== "completed",
+      ),
+    [list, filter],
+  );
+
+  return (
+    <main className="mx-auto w-full max-w-3xl flex-1 px-4 py-6 sm:px-6 sm:py-10">
+      <header className="mb-6">
+        <h1 className="font-[family-name:var(--font-title)] text-2xl font-semibold text-foreground sm:text-3xl">
+          Quizzes
+        </h1>
+        <p className="mt-1 text-sm text-muted-foreground">
+          Test what you&apos;ve read and heard. Each quiz can be taken once, and
+          only you can see your results.
+        </p>
+      </header>
+
+      {user && (
+        <div className="mb-4 flex gap-1">
+          {(
+            [
+              ["all", "All"],
+              ["todo", "To do"],
+              ["done", "Finished"],
+            ] as const
+          ).map(([k, label]) => (
+            <button
+              key={k}
+              type="button"
+              onClick={() => setFilter(k)}
+              className={cn(
+                "rounded-full px-3 py-1 text-sm transition-colors",
+                filter === k
+                  ? "bg-primary text-primary-foreground dark:text-white"
+                  : "text-muted-foreground hover:bg-muted hover:text-foreground",
+              )}
+            >
+              {label}
+            </button>
+          ))}
+        </div>
+      )}
+
+      {list === null ? (
+        <p className="text-sm text-muted-foreground">Loading…</p>
+      ) : shown.length === 0 ? (
+        <p className="text-sm text-muted-foreground">
+          {list.length === 0
+            ? "No quizzes yet — check back soon."
+            : "Nothing here."}
+        </p>
+      ) : (
+        <ul className="grid gap-3 sm:grid-cols-2">
+          {shown.map((q) => {
+            const done = q.my.state === "completed";
+            return (
+              <li key={q.id}>
+                <Link
+                  href={`/quizzes/${q.id}`}
+                  className="flex h-full flex-col rounded-2xl border border-border bg-card p-4 transition-colors hover:border-primary/40 hover:bg-muted/30"
+                >
+                  <p className="text-xs font-medium text-primary">
+                    {KIND[q.target_kind]}
+                  </p>
+                  <p className="mt-1 font-semibold leading-snug text-foreground">
+                    {q.title}
+                  </p>
+                  {q.target_title && (
+                    <p className="mt-0.5 truncate text-sm text-muted-foreground">
+                      {q.target_title}
+                    </p>
+                  )}
+                  <div className="mt-auto flex items-center justify-between gap-2 pt-4 text-xs">
+                    <span className="text-muted-foreground">
+                      {q.question_count}{" "}
+                      {q.question_count === 1 ? "question" : "questions"}
+                    </span>
+                    <span
+                      className={cn(
+                        "inline-flex items-center gap-1 font-medium",
+                        done ? "text-muted-foreground" : "text-primary",
+                      )}
+                    >
+                      <ClipboardCheck className="size-3.5" />
+                      {quizActionLabel(q.my.state)}
+                      {done &&
+                        q.my.score !== undefined &&
+                        ` · ${q.my.score}/${q.my.total}`}
+                    </span>
+                  </div>
+                </Link>
+              </li>
+            );
+          })}
+        </ul>
+      )}
+    </main>
+  );
+}

components/knowledgebase-index.tsx

@@ -5,7 +5,8 @@
  * library.
  *
  * Two sections, top to bottom:
- *   1. Start here — three primary entry points (Books, Letters, Lectures)
+ *   1. Start here — a Quizzes tile, then three primary entry points
+ *                   (Books, Letters, Lectures), all one width
  *                   rendered as full-width feature tiles with longer copy.
  *   2. Explore    — a six-card asymmetric grid for the remaining sections.
  *
@@ -26,6 +27,7 @@ import {
   PenLine,
   Users,
 } from "lucide-react";
+import { QuizzesCTA } from "@/components/quiz/quizzes-cta";
 
 type Feature = {
   href: string;
@@ -112,7 +114,11 @@ export function KnowledgebaseIndex() {
     <div>
       <section className="py-4">
         <SectionHeading eyebrow="Start here" title="Three doors in" />
-        <div className="grid grid-cols-1 md:grid-cols-3 gap-4 sm:gap-5">
+        {/* One grid so all four share a width. Quizzes lead: something to
+            do, ahead of the three ways in to read. Absent until one is
+            published, leaving the original three across. */}
+        <div className="grid grid-cols-1 sm:grid-cols-2 lg:grid-cols-none lg:grid-flow-col lg:auto-cols-fr gap-4 sm:gap-5">
+          <QuizzesCTA variant="tile" />
           {FEATURED.map((f) => (
             <FeaturedTile key={f.href} feature={f} />
           ))}
@@ -145,7 +151,7 @@ function FeaturedTile({ feature }: { feature: Feature }) {
         <ArrowUpRight className="size-4 text-muted-foreground/60 group-hover:text-foreground transition-colors" />
       </div>
 
-      <h3 className="mt-5 font-[family-name:var(--font-title)] font-semibold text-2xl sm:text-[1.6rem] leading-tight text-foreground">
+      <h3 className="mt-5 font-[family-name:var(--font-title)] font-semibold text-2xl sm:text-[1.6rem] lg:text-[1.35rem] leading-tight text-foreground">
         {feature.label}
       </h3>
 

components/layout/page-header.tsx

@@ -28,6 +28,7 @@ import { useRouter, usePathname } from "next/navigation";
 import { Check, Link2 } from "lucide-react";
 import { cn } from "@/lib/utils";
 import { SaveOfflineButton } from "@/components/layout/save-offline-button";
+import { QuizButton } from "@/components/quiz/quiz-button";
 import type { OfflineDescriptor } from "@/lib/offline";
 
 const SEARCH_RETURN_KEY = "spsays_from_search";
@@ -71,6 +72,7 @@ export function PageHeader({
   bare = false,
   sticky = false,
   offline,
+  quiz = true,
 }: {
   children: React.ReactNode;
   /** Drop the bordered chrome — useful for pages that want flush title text. */
@@ -89,6 +91,13 @@ export function PageHeader({
    * visible gap.
    */
   sticky?: boolean;
+  /**
+   * Show this page's quiz button (if it has a published quiz) under the
+   * title. On by default for content pages; a page that places the button
+   * itself — the transcript, beside its audio player — turns this off so it
+   * never appears twice.
+   */
+  quiz?: boolean;
   className?: string;
 }) {
   const router = useRouter();
@@ -216,6 +225,9 @@ export function PageHeader({
 
         {/* Page-level controls, anchored at the header's bottom. */}
         <div className="mt-3 flex flex-wrap items-center gap-2">
+          {/* First, so it reads as belonging to the title above it. Renders
+              nothing on pages without a published quiz. */}
+          {quiz && isContentPath(pathname) ? <QuizButton path={pathname} /> : null}
           <button
             type="button"
             onClick={copyPageLink}

components/quiz/quiz-button.tsx

@@ -0,0 +1,74 @@
+"use client";
+
+/**
+ * The quiz button on a content page.
+ *
+ * Asks the BFF whether this page has a published quiz and renders nothing if
+ * not, so it can sit on every content page without leaving an empty slot.
+ * Its label tracks progress: Take quiz → Continue quiz → View results.
+ */
+
+import { useEffect, useState } from "react";
+import Link from "next/link";
+import { ClipboardCheck } from "lucide-react";
+import { useAuth } from "@/components/auth/auth-provider";
+import { quiz, quizActionLabel, type QuizCard } from "@/lib/quiz";
+import { cn } from "@/lib/utils";
+
+export function QuizButton({
+  path,
+  className,
+}: {
+  /** The content page's own path, e.g. /books/bg/2. */
+  path: string;
+  className?: string;
+}) {
+  const { user } = useAuth();
+  const [card, setCard] = useState<QuizCard | null>(null);
+
+  // Re-asked when the user changes, so progress appears right after sign-in.
+  useEffect(() => {
+    let cancelled = false;
+    quiz
+      .forPath(path)
+      .then((c) => {
+        if (!cancelled) setCard(c);
+      })
+      .catch(() => {
+        /* no quiz button is the right failure */
+      });
+    return () => {
+      cancelled = true;
+    };
+  }, [path, user?.id]);
+
+  if (!card) return null;
+
+  const done = card.my.state === "completed";
+  return (
+    <Link
+      href={`/quizzes/${card.id}`}
+      title={card.title}
+      className={cn(
+        "inline-flex items-center gap-1.5 rounded-md border px-2.5 py-1 text-xs font-medium transition-colors",
+        done
+          ? "border-border text-muted-foreground hover:bg-muted hover:text-foreground"
+          : "border-primary/40 bg-primary/10 text-primary hover:bg-primary/15",
+        className,
+      )}
+    >
+      <ClipboardCheck className="size-3.5" />
+      {quizActionLabel(card.my.state)}
+      {card.my.state === "in_progress" && (
+        <span className="tabular-nums opacity-70">
+          {card.my.answered}/{card.my.total}
+        </span>
+      )}
+      {done && card.my.score !== undefined && (
+        <span className="tabular-nums opacity-70">
+          {card.my.score}/{card.my.total}
+        </span>
+      )}
+    </Link>
+  );
+}

components/quiz/quiz-result-view.tsx

@@ -0,0 +1,132 @@
+"use client";
+
+/**
+ * Your finished attempt: the score, then every question with your answer,
+ * the correct one, its explanation, and how long you took.
+ *
+ * Correct options are filled solid so they read at a glance; a wrong pick is
+ * outlined in red. "Your answer" marks whatever you chose either way.
+ */
+
+import Link from "next/link";
+import { Check, Clock, X } from "lucide-react";
+import { RichText } from "@/lib/rich-text";
+import type { QuizResult } from "@/lib/quiz";
+import { cn } from "@/lib/utils";
+
+export function fmtMs(ms?: number | null): string {
+  if (ms == null) return "—";
+  if (ms < 60_000) return `${(ms / 1000).toFixed(1)}s`;
+  return `${Math.floor(ms / 60_000)}m ${Math.round((ms % 60_000) / 1000)}s`;
+}
+
+export function QuizResultView({ result }: { result: QuizResult }) {
+  const pct = result.total
+    ? Math.round((result.score / result.total) * 100)
+    : 0;
+
+  return (
+    <div className="space-y-6">
+      <section className="rounded-2xl border border-border bg-card p-5 text-center">
+        <p className="text-xs font-medium uppercase tracking-wide text-primary">
+          Your result
+        </p>
+        <p className="mt-2 text-4xl font-semibold tabular-nums text-foreground">
+          {result.score}
+          <span className="text-2xl text-muted-foreground">
+            /{result.total}
+          </span>
+        </p>
+        <p className="mt-1 text-sm text-muted-foreground">
+          {pct}% correct · {fmtMs(result.total_ms)} in total
+        </p>
+        {result.quiz.target_path && (
+          <Link
+            href={result.quiz.target_path}
+            className="mt-3 inline-block text-sm font-medium text-primary hover:underline"
+          >
+            Back to {result.quiz.target_title || "the reading"}
+          </Link>
+        )}
+      </section>
+
+      <ol className="space-y-4">
+        {result.items.map((it, i) => (
+          <li key={it.id} className="rounded-xl border border-border p-4">
+            <div className="flex items-start justify-between gap-3">
+              <p className="text-sm font-medium text-foreground">
+                <span className="text-muted-foreground">{i + 1}. </span>
+                <RichText text={it.prompt} />
+              </p>
+              <span
+                className={cn(
+                  "inline-flex shrink-0 items-center gap-1 text-xs",
+                  it.is_correct ? "text-primary" : "text-destructive",
+                )}
+              >
+                {it.is_correct ? (
+                  <Check className="size-3.5" />
+                ) : (
+                  <X className="size-3.5" />
+                )}
+                {it.is_correct ? "Correct" : "Incorrect"}
+              </span>
+            </div>
+            {it.multi && (
+              <p className="mt-1 text-xs text-muted-foreground">
+                Select all that apply
+              </p>
+            )}
+            <ul className="mt-3 space-y-1.5">
+              {it.options.map((o) => {
+                const chosen = it.chosen_option_ids.includes(o.id);
+                return (
+                  <li
+                    key={o.id}
+                    className={cn(
+                      "flex items-start gap-2 rounded-lg border px-3 py-2 text-sm",
+                      o.is_correct
+                        ? "border-primary bg-primary font-medium text-primary-foreground dark:text-white"
+                        : chosen
+                          ? "border-destructive/50 bg-destructive/10 text-foreground"
+                          : "border-border text-muted-foreground",
+                    )}
+                  >
+                    {o.is_correct ? (
+                      <Check className="mt-0.5 size-3.5 shrink-0" strokeWidth={3} />
+                    ) : chosen ? (
+                      <X className="mt-0.5 size-3.5 shrink-0 text-destructive" />
+                    ) : (
+                      <span className="size-3.5 shrink-0" />
+                    )}
+                    <span className="min-w-0 flex-1">
+                      <RichText text={o.body} />
+                    </span>
+                    {chosen && (
+                      <span
+                        className={cn(
+                          "shrink-0 text-xs font-normal",
+                          o.is_correct ? "opacity-85" : "text-muted-foreground",
+                        )}
+                      >
+                        Your answer
+                      </span>
+                    )}
+                  </li>
+                );
+              })}
+            </ul>
+            {it.explanation && (
+              <p className="mt-3 rounded-lg bg-muted/40 px-3 py-2 text-sm text-muted-foreground">
+                <RichText text={it.explanation} />
+              </p>
+            )}
+            <p className="mt-2 flex items-center gap-1 text-xs text-muted-foreground">
+              <Clock className="size-3" /> {fmtMs(it.response_ms)}
+            </p>
+          </li>
+        ))}
+      </ol>
+    </div>
+  );
+}

components/quiz/quizzes-cta.tsx

@@ -0,0 +1,106 @@
+"use client";
+
+/**
+ * QuizzesCTA — the way into /quizzes, in two shapes:
+ *
+ *   - "tile":   a card that leads the search page's "Start here" row.
+ *   - "banner": a full-width row for the homepage, under sādhana / vāṇī.
+ *
+ * Renders nothing until there is at least one published quiz; with
+ * `pendingOnly` it also hides once every quiz has been finished, so the
+ * homepage only nudges when there's something left to do.
+ */
+
+import { useEffect, useState } from "react";
+import Link from "next/link";
+import { ArrowUpRight, ChevronRight, ClipboardCheck } from "lucide-react";
+import { useAuth } from "@/components/auth/auth-provider";
+import { quiz, type QuizCard } from "@/lib/quiz";
+import { cn } from "@/lib/utils";
+
+export function QuizzesCTA({
+  variant = "banner",
+  pendingOnly = false,
+  className,
+}: {
+  variant?: "banner" | "tile";
+  pendingOnly?: boolean;
+  className?: string;
+}) {
+  const { user } = useAuth();
+  const [cards, setCards] = useState<QuizCard[] | null>(null);
+
+  useEffect(() => {
+    let cancelled = false;
+    quiz
+      .list()
+      .then((c) => {
+        if (!cancelled) setCards(c);
+      })
+      .catch(() => {
+        /* CTA simply doesn't render */
+      });
+    return () => {
+      cancelled = true;
+    };
+    // Refetch on sign-in/out: progress is per user.
+  }, [user?.id]);
+
+  if (!cards?.length) return null;
+
+  if (pendingOnly && cards.every((c) => c.my.state === "completed")) {
+    return null;
+  }
+
+  const tagline = "Test your understanding of chapters, lectures and more";
+
+  if (variant === "tile") {
+    // Matches the search page's FeaturedTile so it sits in that grid as an
+    // equal: same padding, icon chip, title scale and corner arrow.
+    return (
+      <Link
+        href="/quizzes"
+        className={cn(
+          "group relative flex flex-col h-full rounded-2xl bg-card ring-1 ring-foreground/10 hover:ring-foreground/25 hover:shadow-md transition-all p-6",
+          className,
+        )}
+      >
+        <div className="flex items-start justify-between">
+          <div className="flex items-center justify-center size-11 rounded-xl bg-primary/12 text-primary">
+            <ClipboardCheck className="size-5" />
+          </div>
+          <ArrowUpRight className="size-4 text-muted-foreground/60 group-hover:text-foreground transition-colors" />
+        </div>
+        <h3 className="mt-5 font-[family-name:var(--font-title)] font-semibold text-2xl sm:text-[1.6rem] lg:text-[1.35rem] leading-tight text-foreground">
+          Quizzes
+        </h3>
+        <p className="mt-2 text-sm text-muted-foreground leading-relaxed flex-1">
+          {tagline}
+        </p>
+      </Link>
+    );
+  }
+
+  return (
+    <Link
+      href="/quizzes"
+      className={cn(
+        "group flex items-center gap-3.5 rounded-2xl border border-border bg-card p-4 text-left transition-colors hover:border-primary/40 hover:bg-muted/40",
+        className,
+      )}
+    >
+      <span className="inline-flex size-12 shrink-0 items-center justify-center rounded-full bg-primary/10 text-primary">
+        <ClipboardCheck className="size-6" />
+      </span>
+      <div className="min-w-0 flex-1">
+        <p className="text-base font-semibold leading-snug text-foreground">
+          Quizzes
+        </p>
+        <p className="truncate text-sm leading-snug text-muted-foreground">
+          {tagline}
+        </p>
+      </div>
+      <ChevronRight className="size-5 shrink-0 text-muted-foreground transition-transform group-hover:translate-x-0.5 group-hover:text-foreground" />
+    </Link>
+  );
+}

components/sadhna/streak-cta.tsx

@@ -8,13 +8,23 @@
  */
 
 import { useEffect, useState } from "react";
+import Image from "next/image";
 import Link from "next/link";
 import { ChevronRight } from "lucide-react";
 import { useAuth } from "@/components/auth/auth-provider";
 import { sadhna, type SadhnaDashboard } from "@/lib/sadhna";
 import { StreakFlame } from "@/components/sadhna/streak-flame";
 
-export function SadhnaStreakCTA() {
+export function SadhnaStreakCTA({
+  compact = false,
+}: {
+  /**
+   * Icon-only tile for the homepage row beside Vāṇī of the Day. The streak
+   * and today's status move into the accessible label and tooltip, and the
+   * tile tints while a streak is running.
+   */
+  compact?: boolean;
+} = {}) {
   const { user, loading } = useAuth();
   const authed = !loading && !!user;
   const [dash, setDash] = useState<SadhnaDashboard | null>(null);
@@ -55,6 +65,35 @@ export function SadhnaStreakCTA() {
         ? "One offering done — finish today"
         : "Chant and post a quote to complete today";
 
+  if (compact) {
+    const active = streak > 0;
+    return (
+      <Link
+        href="/sadhna-streak"
+        aria-label={`${title}. ${subtitle}`}
+        title={`${title} — ${subtitle}`}
+        className={
+          // An explicit square matching the homepage row's h-24. Deriving the
+          // width from height (aspect-square + h-full) collapses to the icon in
+          // Safari, so both sides are fixed.
+          "group p-2 flex flex-col size-24 shrink-0 items-center justify-center rounded-2xl border transition-colors " +
+          (active
+            ? "border-primary/30 bg-primary/10 hover:border-primary/50"
+            : "border-border bg-card hover:border-primary/40 hover:bg-muted/40")
+        }
+      >
+        <Image
+          src="/icons/chanting-beads.svg"
+          alt=""
+          width={44}
+          height={44}
+          className="size-12 transition-transform group-hover:scale-105"
+          unoptimized
+        />
+      </Link>
+    );
+  }
+
   return (
     <Link
       href="/sadhna-streak"

components/vani/vani-of-the-day-cta.tsx

@@ -12,6 +12,7 @@ import { useEffect, useState } from "react";
 import Link from "next/link";
 import { ChevronRight } from "lucide-react";
 import { getVaniOfTheDay, type Vani } from "@/lib/vani";
+import { cn } from "@/lib/utils";
 
 /** Quote-marks glyph (svgrepo). Inherits color via `currentColor`. */
 function QuotesIcon({ className }: { className?: string }) {
@@ -28,7 +29,7 @@ function QuotesIcon({ className }: { className?: string }) {
   );
 }
 
-export function VaniOfTheDayCTA() {
+export function VaniOfTheDayCTA({ className }: { className?: string } = {}) {
   const [vani, setVani] = useState<Vani | null>(null);
 
   useEffect(() => {
@@ -57,11 +58,11 @@ export function VaniOfTheDayCTA() {
   return (
     <Link
       href={vani.href}
-      className="group flex w-full max-w-md items-center gap-3.5 rounded-2xl border border-border bg-card p-4 text-left transition-colors hover:border-primary/40 hover:bg-muted/40"
+      className={cn(
+        "group flex w-full max-w-md items-center gap-3.5 rounded-2xl border border-border bg-card p-4 text-left transition-colors hover:border-primary/40 hover:bg-muted/40",
+        className,
+      )}
     >
-      <span className="inline-flex size-12 shrink-0 items-center justify-center rounded-full bg-primary/10 text-primary">
-        <QuotesIcon className="size-6" />
-      </span>
       <div className="min-w-0 flex-1">
         <p className="text-xs font-medium text-primary">Vani of the day</p>
         <p className="mt-0.5 truncate text-base font-semibold text-foreground leading-snug">

lib/quiz.ts

@@ -0,0 +1,121 @@
+/**
+ * Browser-side client for quizzes.
+ *
+ * Correct answers never come down while an attempt is in progress — the BFF
+ * withholds them — so nothing here can reveal one early. Results are only
+ * ever the caller's own: the BFF reads the user from the session.
+ */
+
+const BFF_BASE = process.env.NEXT_PUBLIC_BFF_URL || "http://localhost:8080";
+
+export class QuizError extends Error {
+  constructor(
+    public status: number,
+    message: string,
+  ) {
+    super(message);
+  }
+}
+
+async function call<T>(path: string, init?: RequestInit): Promise<T> {
+  const res = await fetch(`${BFF_BASE}/api/v1${path}`, {
+    credentials: "include",
+    headers: { "Content-Type": "application/json" },
+    ...init,
+  });
+  let json: { data?: T; error?: { message?: string } } | null = null;
+  try {
+    json = await res.json();
+  } catch {
+    /* empty body */
+  }
+  if (!res.ok) {
+    throw new QuizError(
+      res.status,
+      json?.error?.message || "Quiz request failed",
+    );
+  }
+  // `data` can legitimately be null (no quiz on this page), so test for the
+  // key rather than falling back with `??`, which would return the envelope.
+  return (json && "data" in json ? json.data : json) as T;
+}
+
+export type QuizState = "not_started" | "in_progress" | "completed";
+
+export type QuizOption = {
+  id: string;
+  ord: number;
+  body: string;
+  is_correct?: boolean;
+};
+
+export type QuizQuestion = {
+  id: string;
+  ord: number;
+  prompt: string;
+  explanation?: string;
+  /** "Select all that apply": several options may be correct. */
+  multi: boolean;
+  options: QuizOption[];
+};
+
+export type QuizCard = {
+  id: string;
+  title: string;
+  description: string;
+  target_kind: "chapter" | "lecture" | "conversation" | "standalone";
+  target_path?: string | null;
+  target_title: string;
+  question_count: number;
+  my: { state: QuizState; answered: number; total: number; score?: number };
+};
+
+export type QuizPlay = {
+  quiz_id: string;
+  title: string;
+  answered: number;
+  total: number;
+  done: boolean;
+  question?: QuizQuestion;
+};
+
+export type QuizResult = {
+  quiz: QuizCard;
+  score: number;
+  total: number;
+  started_at: string;
+  completed_at?: string;
+  total_ms: number;
+  items: (QuizQuestion & {
+    chosen_option_ids: string[];
+    is_correct: boolean;
+    response_ms?: number;
+  })[];
+};
+
+export const quiz = {
+  /** The quiz on a content page, or null when it has none. */
+  forPath: (path: string) =>
+    call<QuizCard | null>(`/quizzes/for?path=${encodeURIComponent(path)}`),
+  list: () => call<QuizCard[]>("/quizzes"),
+  get: (id: string) => call<QuizCard>(`/quizzes/${id}`),
+  /** Opens or resumes your attempt and returns the current question. */
+  start: (id: string) =>
+    call<QuizPlay>(`/quizzes/${id}/start`, { method: "POST" }),
+  /** One option, or several for a multi question. Final once sent. */
+  answer: (id: string, questionId: string, optionIds: string[]) =>
+    call<QuizPlay>(`/quizzes/${id}/answer`, {
+      method: "POST",
+      body: JSON.stringify({ question_id: questionId, option_ids: optionIds }),
+    }),
+  result: (id: string) => call<QuizResult>(`/quizzes/${id}/result`),
+};
+
+/** The button's wording follows where you are in the quiz. */
+export function quizActionLabel(state: QuizState): string {
+  return state === "completed"
+    ? "View results"
+    : state === "in_progress"
+      ? "Continue quiz"
+      : "Take quiz";
+}