From 0f15ae0bfc33a0e8504aa354acacce158010505c Mon Sep 17 00:00:00 2001
From: Esa Kataja <ekataja@gmail.com>
Date: Sun, 2 Aug 2026 20:58:52 +0300
Subject: [PATCH] Release 2026.08.02-1

SQLite replaces Postgres, and two fixes from using the thing.

- The database is a file under ./storage instead of a second container. Ten
  members never needed a database server, and the driver is pure Go, so the
  build stays CGO_ENABLED=0 and the dependency count is unchanged. One bind
  mount is now the whole backup: no pgdata, no healthcheck-gated depends_on,
  no startup retry loop. Timestamps are UTC text, idle_ttl is seconds, the
  divisive/unified boards carry their own stddev, and foreign keys are on by
  pragma. Tests get a database file each and run without any setup
- Invites are copied, not clicked. An invite is something to send, and the
  anchor opened the join form in the admin's own browser
- Feedback asks for more than faults: the footer reads "Ongelmia? Ideoita?
  Palautetta?" and the page behind it invites ideas rather than only bugs
- Kuuntele YouTubessa opens in a new tab, so a half-typed review survives it
---
 .env.example            |  3 +-
 .gitignore              |  1 -
 Dockerfile              |  4 +-
 README.md               | 36 ++++++++--------
 admin.go                | 22 +++++-----
 auth.go                 | 61 +++++++++++++++------------
 auth_test.go            | 46 +++++++++------------
 docker-compose.yml      | 22 +---------
 docs/decisions.md       | 27 ++++++++++++
 docs/later.md           |  2 +-
 docs/spec.md            | 49 +++++++++++++---------
 go.mod                  | 24 +++++++----
 go.sum                  | 22 ++++++++++
 lyrics.go               |  4 +-
 main.go                 | 90 +++++++++++++++++++++++-----------------
 main_test.go            | 27 +++---------
 migrate.go              | 39 ++++++++---------
 migrations/001_init.sql | 92 +++++++++++++++++++++--------------------
 profile.go              | 22 +++++-----
 render.go               |  4 +-
 reports.go              | 19 +++++----
 reviews.go              | 37 +++++++++--------
 songs.go                | 35 ++++++++--------
 songs_test.go           | 32 +++++++-------
 static/style.css        |  4 ++
 stats.go                | 30 +++++++-------
 stats_test.go           |  2 +-
 submit.go               | 47 +++++++++++----------
 submit_test.go          | 30 +++++++-------
 templates/admin.html    | 32 +++++++++++++-
 templates/layout.html   |  2 +-
 templates/report.html   |  6 +--
 templates/song.html     |  3 +-
 33 files changed, 480 insertions(+), 396 deletions(-)

diff --git a/.env.example b/.env.example
index d0af2b7..9f07709 100644
--- a/.env.example
+++ b/.env.example
@@ -1,5 +1,4 @@
-# Copy to .env and edit. Neither password has a default.
-POSTGRES_PASSWORD=
+# Copy to .env and edit. The admin password has no default.
 ADMIN_USER=admin
 ADMIN_PASSWORD=
 
diff --git a/.gitignore b/.gitignore
index ff8cb42..f1d483c 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,5 +1,4 @@
 /levyraati
 /levyraati26-go
 /storage/
-/pgdata/
 .env
diff --git a/Dockerfile b/Dockerfile
index d34ab57..cb35ab2 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -10,7 +10,9 @@ RUN CGO_ENABLED=0 go build -ldflags "-X main.version=${VERSION}" -o /levyraati .
 FROM alpine:3.24
 # yt-dlp rots against YouTube. Alpine's active branch tracks it closely (3.24 carries the current
 # release), so a rebuild is the update — and this avoids python3 + pip in the image entirely.
-RUN apk add --no-cache ffmpeg yt-dlp ca-certificates
+# sqlite is the CLI only — the app links its own pure-Go copy. It is here so `.backup` and a shell
+# are reachable with docker compose exec, which is the whole of database operations now.
+RUN apk add --no-cache ffmpeg yt-dlp ca-certificates sqlite
 COPY --from=build /levyraati /usr/local/bin/levyraati
 ENV STORAGE_DIR=/storage
 EXPOSE 8080
diff --git a/README.md b/README.md
index eaa1dee..370a0be 100644
--- a/README.md
+++ b/README.md
@@ -45,10 +45,12 @@ Members have an address because it is their login and because mail is a planned
 
 ## Stack
 
-Go, Postgres, `html/template`, HTMX + Alpine. Audio is converted with ffmpeg and downloaded with
-yt-dlp. One binary, one origin — there is no separate frontend to deploy.
+Go, SQLite, `html/template`, HTMX + Alpine. Audio is converted with ffmpeg and downloaded with
+yt-dlp. One binary, one origin, one container — there is no separate frontend and no database server
+to deploy.
 
-Go dependencies: `pgx/v5` and `golang.org/x/crypto`. No Node, no npm, no bundler.
+Go dependencies: `modernc.org/sqlite` and `golang.org/x/crypto`. The SQLite driver is pure Go, so the
+build stays `CGO_ENABLED=0`. No Node, no npm, no bundler.
 
 ## Running it
 
@@ -64,8 +66,7 @@ creates no users: log into the admin panel and mint an invite.
 
 | Variable | Default | Notes |
 |---|---|---|
-| `POSTGRES_PASSWORD` | — | **Required by Compose.** Used to build `DATABASE_URL` for the app |
-| `DATABASE_URL` | — | `postgres://user:pass@postgres:5432/levyraati` |
+| `DB_PATH` | `$STORAGE_DIR/levyraati.db` | The SQLite file. Created on first start |
 | `ADMIN_USER` | `admin` | Admin panel username |
 | `ADMIN_PASSWORD` | — | **Required.** No default; the app refuses to start without it |
 | `ADDR` | `:8080` | Member-facing listener |
@@ -77,16 +78,14 @@ creates no users: log into the admin panel and mint an invite.
 ### Local development
 
 ```sh
-docker compose up -d postgres
-export DATABASE_URL="postgres://levyraati:$POSTGRES_PASSWORD@localhost:5432/levyraati"
 export ADMIN_PASSWORD=dev SECURE_COOKIES=false
 go run .
 ```
 
-Requires Go 1.24+, plus `ffmpeg`, `ffprobe`, and `yt-dlp` on `PATH`.
+Requires Go 1.25+, plus `ffmpeg`, `ffprobe`, and `yt-dlp` on `PATH`. There is nothing to start first:
+the database is a file under `./storage`, created on the first run.
 
-Tests that need a database are skipped unless `TEST_DATABASE_URL` points at a throwaway one — the
-migration test drops and recreates the `public` schema, so never point it at anything you care about.
+Tests get a fresh database file in a temp directory each, so they need no setup and touch nothing:
 
 ```sh
 go test ./...
@@ -136,23 +135,22 @@ JSON to stdout, nothing else. There is no log table and no log viewer in the app
 
 ### Backups
 
-Two paths hold everything:
+`./storage` holds everything: audio files, avatars, and `levyraati.db`. It is a bind mount, so a copy
+of that one directory is the whole backup. `storage/tmp/` is in-flight conversions and is safe to
+skip; it's cleared on startup anyway.
 
-- `./pgdata` — the database. Postgres 18 stores it under a version subdirectory (`18/docker`), so
-  the mount is `/var/lib/postgresql`, not `/var/lib/postgresql/data`
-- `./storage` — audio files and avatars
-
-Both are bind mounts. `storage/tmp/` is in-flight conversions and is safe to skip; it's cleared on
-startup anyway.
+Copying the file while the app is running is not a backup — WAL means the latest writes live in a
+sidecar file. Ask SQLite for a consistent snapshot instead:
 
 ```sh
-docker compose exec postgres pg_dump -U levyraati levyraati | gzip > backup-$(date +%F).sql.gz
+docker compose exec app sqlite3 /storage/levyraati.db ".backup '/storage/tmp/backup.db'"
+gzip -c storage/tmp/backup.db > backup-$(date +%F).db.gz && rm storage/tmp/backup.db
 ```
 
 ### Database shell
 
 ```sh
-docker compose exec postgres psql -U levyraati levyraati
+docker compose exec app sqlite3 /storage/levyraati.db
 ```
 
 ## Layout
diff --git a/admin.go b/admin.go
index 408be4f..3bd8c54 100644
--- a/admin.go
+++ b/admin.go
@@ -41,12 +41,12 @@ func (a *app) adminDashboard(w http.ResponseWriter, r *http.Request) {
 
 	// Unused invites are the ones with a job to do; spent ones are counted, not listed. Truncating
 	// a list silently reads as "that's all of them".
-	if err := a.pool.QueryRow(r.Context(),
-		`select count(*)::int from invites where not is_valid`).Scan(&d.SpentCount); err != nil {
+	if err := a.db.QueryRowContext(r.Context(),
+		`select count(*) from invites where not is_valid`).Scan(&d.SpentCount); err != nil {
 		adminError(w, "invites", err)
 		return
 	}
-	rows, err := a.pool.Query(r.Context(),
+	rows, err := a.db.QueryContext(r.Context(),
 		`select id, code, is_valid, created_at from invites where is_valid order by created_at desc`)
 	if err != nil {
 		adminError(w, "invites", err)
@@ -67,7 +67,7 @@ func (a *app) adminDashboard(w http.ResponseWriter, r *http.Request) {
 		return
 	}
 
-	rows, err = a.pool.Query(r.Context(),
+	rows, err = a.db.QueryContext(r.Context(),
 		`select id, name, email, banned, created_at from users order by created_at`)
 	if err != nil {
 		adminError(w, "users", err)
@@ -91,8 +91,8 @@ func (a *app) adminDashboard(w http.ResponseWriter, r *http.Request) {
 		adminError(w, "songs", err)
 		return
 	}
-	if err := a.pool.QueryRow(r.Context(),
-		`select count(*)::int from reports where resolved_at is null`).Scan(&d.OpenCount); err != nil {
+	if err := a.db.QueryRowContext(r.Context(),
+		`select count(*) from reports where resolved_at is null`).Scan(&d.OpenCount); err != nil {
 		adminError(w, "reports", err)
 		return
 	}
@@ -116,7 +116,7 @@ func (a *app) inviteLink(code string) string {
 
 func (a *app) createInvite(w http.ResponseWriter, r *http.Request) {
 	code := inviteCode()
-	if _, err := a.pool.Exec(r.Context(), `insert into invites (code) values ($1)`, code); err != nil {
+	if _, err := a.db.ExecContext(r.Context(), `insert into invites (code) values ($1)`, code); err != nil {
 		adminError(w, "invites", err)
 		return
 	}
@@ -136,14 +136,14 @@ func (a *app) toggleBan(w http.ResponseWriter, r *http.Request) {
 		return
 	}
 	var banned bool
-	err = a.pool.QueryRow(r.Context(),
+	err = a.db.QueryRowContext(r.Context(),
 		`update users set banned = not banned where id = $1 returning banned`, id).Scan(&banned)
 	if err != nil {
 		adminError(w, "users", err)
 		return
 	}
 	if banned {
-		if _, err := a.pool.Exec(r.Context(), `delete from sessions where user_id = $1`, id); err != nil {
+		if _, err := a.db.ExecContext(r.Context(), `delete from sessions where user_id = $1`, id); err != nil {
 			adminError(w, "users", err)
 			return
 		}
@@ -173,12 +173,12 @@ func (a *app) resetPassword(w http.ResponseWriter, r *http.Request) {
 		adminError(w, "auth", err)
 		return
 	}
-	if _, err := a.pool.Exec(r.Context(),
+	if _, err := a.db.ExecContext(r.Context(),
 		`update users set password_hash = $2 where id = $1`, id, string(hash)); err != nil {
 		adminError(w, "auth", err)
 		return
 	}
-	if _, err := a.pool.Exec(r.Context(), `delete from sessions where user_id = $1`, id); err != nil {
+	if _, err := a.db.ExecContext(r.Context(), `delete from sessions where user_id = $1`, id); err != nil {
 		adminError(w, "auth", err)
 		return
 	}
diff --git a/auth.go b/auth.go
index 01d582c..23b841b 100644
--- a/auth.go
+++ b/auth.go
@@ -3,6 +3,7 @@ package main
 import (
 	"context"
 	"crypto/rand"
+	"database/sql"
 	"encoding/hex"
 	"errors"
 	"log/slog"
@@ -10,8 +11,8 @@ import (
 	"strings"
 	"time"
 
-	"github.com/jackc/pgx/v5"
 	"golang.org/x/crypto/bcrypt"
+	"modernc.org/sqlite"
 )
 
 const (
@@ -79,9 +80,9 @@ func (a *app) startSession(ctx context.Context, userID int64, remember bool) (st
 	}
 	tok := token()
 	expires := time.Now().Add(ttl)
-	_, err := a.pool.Exec(ctx,
+	_, err := a.db.ExecContext(ctx,
 		`insert into sessions (token, user_id, idle_ttl, expires_at) values ($1, $2, $3, $4)`,
-		tok, userID, ttl, expires)
+		tok, userID, int64(ttl.Seconds()), expires)
 	return tok, expires, err
 }
 
@@ -100,32 +101,32 @@ func (a *app) session(w http.ResponseWriter, r *http.Request) *member {
 		return nil
 	}
 	var (
-		m         member
-		expires   time.Time
-		ttl       time.Duration
-		ttlMicros int64
+		m          member
+		expires    time.Time
+		ttl        time.Duration
+		ttlSeconds int64
 	)
-	err := a.pool.QueryRow(r.Context(), `
-		select s.expires_at, extract(epoch from s.idle_ttl) * 1000000,
+	err := a.db.QueryRowContext(r.Context(), `
+		select s.expires_at, s.idle_ttl,
 		       u.id, u.name, u.email, u.avatar, u.banned, u.created_at
 		  from sessions s join users u on u.id = s.user_id
-		 where s.token = $1 and s.expires_at > now()`, tok).
-		Scan(&expires, &ttlMicros, &m.ID, &m.Name, &m.Email, &m.Avatar, &m.Banned, &m.CreatedAt)
+		 where s.token = $1 and s.expires_at > datetime('now')`, tok).
+		Scan(&expires, &ttlSeconds, &m.ID, &m.Name, &m.Email, &m.Avatar, &m.Banned, &m.CreatedAt)
 	if err != nil {
-		if !errors.Is(err, pgx.ErrNoRows) {
+		if !errors.Is(err, sql.ErrNoRows) {
 			slog.Error("session lookup", "ctx", "auth", "error", err)
 		}
 		return nil
 	}
 	if m.Banned {
 		// Banning deletes sessions, so this is belt and braces for a row that outlived one.
-		a.pool.Exec(r.Context(), `delete from sessions where user_id = $1`, m.ID)
+		a.db.ExecContext(r.Context(), `delete from sessions where user_id = $1`, m.ID)
 		return nil
 	}
-	ttl = time.Duration(ttlMicros) * time.Microsecond
+	ttl = time.Duration(ttlSeconds) * time.Second
 	if time.Until(expires) < ttl-extendAfter {
 		newExpiry := time.Now().Add(ttl)
-		if _, err := a.pool.Exec(r.Context(),
+		if _, err := a.db.ExecContext(r.Context(),
 			`update sessions set expires_at = $2 where token = $1`, tok, newExpiry); err == nil {
 			a.setSessionCookie(w, tok, newExpiry)
 		}
@@ -178,7 +179,7 @@ func (a *app) login(w http.ResponseWriter, r *http.Request) {
 		hash   string
 		banned bool
 	)
-	err := a.pool.QueryRow(r.Context(),
+	err := a.db.QueryRowContext(r.Context(),
 		`select id, password_hash, banned from users where email = $1`, email).Scan(&id, &hash, &banned)
 	if err != nil || bcrypt.CompareHashAndPassword([]byte(hash), []byte(r.FormValue("password"))) != nil {
 		a.logins.fail(email)
@@ -208,7 +209,7 @@ func (a *app) login(w http.ResponseWriter, r *http.Request) {
 
 func (a *app) logout(w http.ResponseWriter, r *http.Request) {
 	if tok := sessionToken(r); tok != "" {
-		a.pool.Exec(r.Context(), `delete from sessions where token = $1`, tok)
+		a.db.ExecContext(r.Context(), `delete from sessions where token = $1`, tok)
 	}
 	http.SetCookie(w, &http.Cookie{
 		Name: sessionCookie, Value: "", Path: "/", MaxAge: -1,
@@ -259,19 +260,19 @@ func (a *app) register(w http.ResponseWriter, r *http.Request) {
 		return
 	}
 
-	tx, err := a.pool.Begin(r.Context())
+	tx, err := a.db.BeginTx(r.Context(), nil)
 	if err != nil {
 		slog.Error("begin", "ctx", "auth", "error", err)
 		http.Error(w, "virhe", http.StatusInternalServerError)
 		return
 	}
-	defer tx.Rollback(r.Context())
+	defer tx.Rollback()
 
 	var inviteID int64
-	err = tx.QueryRow(r.Context(),
-		`update invites set is_valid = false where code = $1 and is_valid returning id`,
+	err = tx.QueryRowContext(r.Context(),
+		`update invites set is_valid = 0 where code = $1 and is_valid returning id`,
 		form.Code).Scan(&inviteID)
-	if errors.Is(err, pgx.ErrNoRows) {
+	if errors.Is(err, sql.ErrNoRows) {
 		form.Errors["code"] = "Kutsukoodi ei kelpaa."
 		a.render(w, r, http.StatusUnprocessableEntity, "register.html", page{Title: "Liity", Narrow: true, Data: form})
 		return
@@ -282,7 +283,7 @@ func (a *app) register(w http.ResponseWriter, r *http.Request) {
 	}
 
 	var userID int64
-	err = tx.QueryRow(r.Context(),
+	err = tx.QueryRowContext(r.Context(),
 		`insert into users (name, email, password_hash) values ($1, $2, $3) returning id`,
 		form.Name, form.Email, string(hash)).Scan(&userID)
 	if isUnique(err) {
@@ -295,7 +296,7 @@ func (a *app) register(w http.ResponseWriter, r *http.Request) {
 		http.Error(w, "virhe", http.StatusInternalServerError)
 		return
 	}
-	if err := tx.Commit(r.Context()); err != nil {
+	if err := tx.Commit(); err != nil {
 		slog.Error("commit registration", "ctx", "auth", "error", err)
 		http.Error(w, "virhe", http.StatusInternalServerError)
 		return
@@ -313,7 +314,15 @@ func (a *app) register(w http.ResponseWriter, r *http.Request) {
 	http.Redirect(w, r, "/", http.StatusSeeOther)
 }
 
+// SQLITE_CONSTRAINT_UNIQUE and SQLITE_CONSTRAINT_PRIMARYKEY, spelled out rather than pulled in from
+// modernc.org/sqlite/lib — that package is the whole generated amalgamation, for two integers.
+const (
+	sqliteConstraintUnique     = 2067
+	sqliteConstraintPrimaryKey = 1555
+)
+
 func isUnique(err error) bool {
-	var pgErr interface{ SQLState() string }
-	return errors.As(err, &pgErr) && pgErr.SQLState() == "23505"
+	var e *sqlite.Error
+	return errors.As(err, &e) &&
+		(e.Code() == sqliteConstraintUnique || e.Code() == sqliteConstraintPrimaryKey)
 }
diff --git a/auth_test.go b/auth_test.go
index e987f8c..f601fc4 100644
--- a/auth_test.go
+++ b/auth_test.go
@@ -6,34 +6,26 @@ import (
 	"net/http"
 	"net/http/httptest"
 	"net/url"
-	"os"
+	"path/filepath"
 	"strings"
 	"testing"
 	"time"
-
-	"github.com/jackc/pgx/v5/pgxpool"
 )
 
-// Set TEST_DATABASE_URL to a throwaway database — these drop and recreate the public schema.
+// A fresh database file per test, thrown away with the temp dir. No server to point at, so these
+// run everywhere rather than only where someone remembered to set an env var.
 func testApp(t *testing.T) *app {
 	t.Helper()
-	dbURL := os.Getenv("TEST_DATABASE_URL")
-	if dbURL == "" {
-		t.Skip("TEST_DATABASE_URL not set")
-	}
 	ctx := context.Background()
-	pool, err := pgxpool.New(ctx, dbURL)
+	db, err := openDB(filepath.Join(t.TempDir(), "test.db"))
 	if err != nil {
 		t.Fatal(err)
 	}
-	t.Cleanup(pool.Close)
-	if _, err := pool.Exec(ctx, `drop schema public cascade; create schema public`); err != nil {
+	t.Cleanup(func() { db.Close() })
+	if err := migrate(ctx, db); err != nil {
 		t.Fatal(err)
 	}
-	if err := migrate(ctx, pool); err != nil {
-		t.Fatal(err)
-	}
-	return &app{cfg: config{adminUser: "admin", adminPass: "s3cret"}, pool: pool}
+	return &app{cfg: config{adminUser: "admin", adminPass: "s3cret"}, db: db}
 }
 
 func post(t *testing.T, h http.Handler, path string, form url.Values) *httptest.ResponseRecorder {
@@ -48,7 +40,7 @@ func post(t *testing.T, h http.Handler, path string, form url.Values) *httptest.
 func (a *app) inviteValid(t *testing.T, code string) bool {
 	t.Helper()
 	var valid bool
-	if err := a.pool.QueryRow(context.Background(),
+	if err := a.db.QueryRowContext(context.Background(),
 		`select is_valid from invites where code = $1`, code).Scan(&valid); err != nil {
 		t.Fatal(err)
 	}
@@ -61,10 +53,10 @@ func TestInviteIsSpentOnlyBySuccess(t *testing.T) {
 	ctx := context.Background()
 	mux := a.withMember(a.memberMux())
 
-	if _, err := a.pool.Exec(ctx, `insert into invites (code) values ('kutsu1')`); err != nil {
+	if _, err := a.db.ExecContext(ctx, `insert into invites (code) values ('kutsu1')`); err != nil {
 		t.Fatal(err)
 	}
-	if _, err := a.pool.Exec(ctx,
+	if _, err := a.db.ExecContext(ctx,
 		`insert into users (name, email, password_hash) values ('Esa', 'esa@example.com', 'x')`); err != nil {
 		t.Fatal(err)
 	}
@@ -131,7 +123,7 @@ func TestLoginHandlerRefusesAfterTooManyFailures(t *testing.T) {
 func (a *app) seedMember(t *testing.T, email string) int64 {
 	t.Helper()
 	var id int64
-	err := a.pool.QueryRow(context.Background(),
+	err := a.db.QueryRowContext(context.Background(),
 		`insert into users (name, email, password_hash) values ('Esa', $1, 'x') returning id`,
 		email).Scan(&id)
 	if err != nil {
@@ -161,8 +153,8 @@ func TestSessionIdleTimeout(t *testing.T) {
 	}
 
 	// Age it past the idle window: the timeout is what expiry means, so this is the whole rule.
-	if _, err := a.pool.Exec(ctx,
-		`update sessions set expires_at = now() - interval '1 second' where token = $1`, live); err != nil {
+	if _, err := a.db.ExecContext(ctx,
+		`update sessions set expires_at = datetime('now', '-1 second') where token = $1`, live); err != nil {
 		t.Fatal(err)
 	}
 	if m := a.sessionFor(t, live); m != nil {
@@ -174,15 +166,15 @@ func TestSessionIdleTimeout(t *testing.T) {
 	if err != nil {
 		t.Fatal(err)
 	}
-	if _, err := a.pool.Exec(ctx,
-		`update sessions set expires_at = now() + interval '1 hour' where token = $1`, fresh); err != nil {
+	if _, err := a.db.ExecContext(ctx,
+		`update sessions set expires_at = datetime('now', '+1 hour') where token = $1`, fresh); err != nil {
 		t.Fatal(err)
 	}
 	if m := a.sessionFor(t, fresh); m == nil {
 		t.Fatal("session inside the window did not resolve")
 	}
 	var expires time.Time
-	if err := a.pool.QueryRow(ctx,
+	if err := a.db.QueryRowContext(ctx,
 		`select expires_at from sessions where token = $1`, fresh).Scan(&expires); err != nil {
 		t.Fatal(err)
 	}
@@ -196,7 +188,7 @@ func TestBanDropsSessionsAndBlocksLogin(t *testing.T) {
 	ctx := context.Background()
 	mux := a.withMember(a.memberMux())
 
-	if _, err := a.pool.Exec(ctx, `insert into invites (code) values ('kutsu2')`); err != nil {
+	if _, err := a.db.ExecContext(ctx, `insert into invites (code) values ('kutsu2')`); err != nil {
 		t.Fatal(err)
 	}
 	w := post(t, mux, "/register", url.Values{
@@ -206,7 +198,7 @@ func TestBanDropsSessionsAndBlocksLogin(t *testing.T) {
 		t.Fatalf("registration: status = %d, want 303", w.Code)
 	}
 	var id int64
-	if err := a.pool.QueryRow(ctx, `select id from users where email = 'esa@example.com'`).Scan(&id); err != nil {
+	if err := a.db.QueryRowContext(ctx, `select id from users where email = 'esa@example.com'`).Scan(&id); err != nil {
 		t.Fatal(err)
 	}
 
@@ -216,7 +208,7 @@ func TestBanDropsSessionsAndBlocksLogin(t *testing.T) {
 	}
 
 	var sessions int
-	if err := a.pool.QueryRow(ctx,
+	if err := a.db.QueryRowContext(ctx,
 		`select count(*) from sessions where user_id = $1`, id).Scan(&sessions); err != nil {
 		t.Fatal(err)
 	}
diff --git a/docker-compose.yml b/docker-compose.yml
index ce4a21a..1234149 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -1,28 +1,10 @@
 services:
-  postgres:
-    image: postgres:18-alpine
-    environment:
-      POSTGRES_USER: levyraati
-      POSTGRES_PASSWORD: ${POSTGRES_PASSWORD:?set POSTGRES_PASSWORD in .env}
-      POSTGRES_DB: levyraati
-    volumes:
-      # Postgres 18 keeps its data in /var/lib/postgresql/<version>/docker, so the mount is the
-      # parent directory, not the old /var/lib/postgresql/data.
-      - ./pgdata:/var/lib/postgresql
-    healthcheck:
-      test: ["CMD-SHELL", "pg_isready -U levyraati"]
-      interval: 5s
-      timeout: 3s
-      retries: 10
-    restart: unless-stopped
-
   app:
     build:
       context: .
       args:
         VERSION: ${VERSION:-dev}
     environment:
-      DATABASE_URL: postgres://levyraati:${POSTGRES_PASSWORD}@postgres:5432/levyraati
       ADMIN_USER: ${ADMIN_USER:-admin}
       ADMIN_PASSWORD: ${ADMIN_PASSWORD:?set ADMIN_PASSWORD in .env}
       ADDR: ":8080"
@@ -31,12 +13,10 @@ services:
       ADMIN_ADDR: ":8081"
       SECURE_COOKIES: ${SECURE_COOKIES:-true}
       PUBLIC_URL: ${PUBLIC_URL:-}
+    # The SQLite file sits in here beside the audio, so this one mount is the whole backup.
     volumes:
       - ./storage:/storage
     ports:
       - "8080:8080"
       - "8081:8081"
-    depends_on:
-      postgres:
-        condition: service_healthy
     restart: unless-stopped
diff --git a/docs/decisions.md b/docs/decisions.md
index 70000b6..caa3eff 100644
--- a/docs/decisions.md
+++ b/docs/decisions.md
@@ -209,3 +209,30 @@ says so.
 
     The coverage assumption that shaped the earlier sketch was wrong and is corrected in `later.md`:
     LRCLIB has synced lyrics for a good share of Finnish rock, not almost none.
+46. **SQLite instead of Postgres — this reverses entries 1 and 3** (2026-08-02). Ten members and a
+    handful of songs a week never needed a database server, and the server was the last thing making
+    this a two-container deployment. `modernc.org/sqlite` is pure Go, so `CGO_ENABLED=0` survives and
+    the dependency count does not change: `pgx` out, `sqlite` in. What it buys: one container, one
+    bind mount that is the entire backup, no `pgdata`, no healthcheck-gated `depends_on`, no startup
+    retry loop, and tests that run anywhere instead of skipping without `TEST_DATABASE_URL`.
+
+    The port was smaller than expected, because the driver matches `$1`-style placeholders against
+    argument ordinals exactly as pgx does — so no query needed rewriting for parameters. What did
+    change:
+    - **`timestamptz` → `timestamp` holding UTC `YYYY-MM-DD HH:MM:SS`.** The declared type is what
+      makes the driver return `time.Time`; the fixed-width UTC string is what makes `order by
+      created_at` and `expires_at > datetime('now')` mean what they say. `_time_format=datetime` and
+      `_timezone=UTC` on the DSN make Go write exactly the shape `datetime('now')` produces, so the
+      two sources of a timestamp are comparable.
+    - **`interval` has no equivalent.** `sessions.idle_ttl` is seconds as an integer, and the review
+      edit window travels as a SQLite date modifier string (`-1800 seconds`).
+    - **No `stddev_pop`.** The divisive and unified boards use the population formula written out,
+      guarded with `max(0.0, …)` because floating-point cancellation returns a tiny negative when
+      every score is identical, and `sqrt` of that is null.
+    - **`foreign_keys` is off by default in SQLite**, so every `on delete cascade` in the schema is
+      decoration without the pragma. It is set on the DSN alongside WAL, `busy_timeout` and
+      `_txlock=immediate`.
+
+    Taken while there was still no data: the tables were recreated rather than converted, same as
+    entry 45. What would reverse this: enough concurrent writers that one writer is a real limit, or
+    wanting the database on a different box from the audio files.
diff --git a/docs/later.md b/docs/later.md
index b40f5ca..10418e0 100644
--- a/docs/later.md
+++ b/docs/later.md
@@ -84,7 +84,7 @@ The constraint that shapes every idea: **E2B-class multimodal models are speech
 encoder targets ASR and spoken-audio QA. Music is out of distribution — genre calls are near
 coin-flips, "describe this track" produces beige copy, and singing over instrumentation is a worst
 case for ASR. Encoders also work in ~30 s windows, so a four-minute song is a chunk loop, and on CPU
-beside Postgres and ffmpeg that is minutes per submission.
+beside ffmpeg that is minutes per submission.
 
 So the ideas that use the model to be *correct* are the weak ones, and the idea that uses it to be
 *entertaining* is the strong one:
diff --git a/docs/spec.md b/docs/spec.md
index 027bbc4..b0baad4 100644
--- a/docs/spec.md
+++ b/docs/spec.md
@@ -327,12 +327,13 @@ and the average.
 Always public, ignores the reveal rule. Minimum **3 reviews** for a song to qualify for any ranking;
 `min_reviews` is published, not hardcoded in a client.
 
-- Songs: Top 10 all-time, Bottom 10, Most Divisive (highest `stddev_pop`), Most Unified (lowest),
+- Songs: Top 10 all-time, Bottom 10, Most Divisive (highest score spread), Most Unified (lowest),
   Most Reviewed.
 - Reviewers: Harshest Critic (lowest average given), Most Generous, Most Active, Most Prolific
   Submitter.
-- Postgres does all of it: `avg()`, `count()`, `stddev_pop()`, `HAVING count(*) >= 3`. Order and
-  limit in SQL, never in Go.
+- SQL does all of it: `avg()`, `count()`, `HAVING count(*) >= 3`. Order and limit in SQL, never in
+  Go. SQLite has no `stddev_pop`, so the divisive/unified boards spell the population formula out —
+  see `stddevPop` in `stats.go`.
 - **Every leaderboard needs a deterministic tie-break** — `ORDER BY value DESC, review_count DESC,
   id ASC`. Ties are common in a ten-person club, and without one the list reshuffles between reloads
   for no reason.
@@ -385,7 +386,7 @@ func requireAdmin(next http.Handler) http.Handler {
 ```
 
 No bcrypt here: hashing protects *stored* passwords against a database leak, and this one lives in
-the env file next to the Postgres password already. The constant-time compare is the part that
+the env file already. The constant-time compare is the part that
 matters. **Fatal at startup if `ADMIN_PASSWORD` is unset** — an admin panel that silently opens is
 worse than one that will not boot.
 
@@ -519,7 +520,7 @@ the first endpoint is one line over a data function that already exists.
 - `snake_case` field names, matching the SQL columns.
 - Timestamps are RFC 3339 UTC strings (`2026-08-01T10:00:00Z`). Never preformatted, never a locale
   string, never a unix int.
-- Ids are JSON numbers (`bigserial`, safely under 2⁵³).
+- Ids are JSON numbers (SQLite rowids, safely under 2⁵³).
 - Nullable fields are present and `null`. **No `omitempty`** — a stable key set is worth more than a
   few bytes, and "missing" versus "null" is a distinction clients get wrong.
 - Scores are integers, averages are floats.
@@ -642,33 +643,41 @@ reason the count-based lists stay until they are proven useless.
 
 ## 9. Data model
 
-Ids are `bigserial`. Session tokens stay random — those are secrets, ids are not, and enumerable ids
-are not a threat model for a login-walled app for ten friends.
+Ids are `integer primary key autoincrement` — never reused, because `storage/audio/<song_id>.ogg` is
+named after one. Session tokens stay random — those are secrets, ids are not, and enumerable ids are
+not a threat model for a login-walled app for ten friends.
+
+Timestamps are declared `timestamp` and hold UTC `YYYY-MM-DD HH:MM:SS`: the declared type is what
+makes the driver return `time.Time`, and the fixed-width UTC string is what makes ordering and
+comparison against `datetime('now')` mean what they say. Booleans are `integer`, 0 or 1.
 
 ```sql
-users       (id bigserial pk, name, email unique, password_hash, avatar, banned, created_at)
-sessions    (token pk, user_id fk not null, idle_ttl interval not null,
+users       (id pk, name, email unique, password_hash, avatar, banned, created_at)
+sessions    (token pk, user_id fk not null, idle_ttl integer not null,   -- seconds
              expires_at, created_at)          -- token: 32 random bytes, hex
-songs       (id bigserial pk, title, artist, genre, description, audio_file,
-             duration_seconds int,
+songs       (id pk, title, artist, genre, description, lyrics, audio_file,
+             duration_seconds integer,
              source_url,          -- nullable, for YouTube submissions
              submitted_by fk users, created_at)
-submissions (id bigserial pk, user_id fk not null,
+submissions (id pk, user_id fk not null,
              status text not null default 'queued',   -- queued|downloading|converting|ready|failed
              status_msg text,
              source_url, tmp_path,
-             title, artist, genre, description,
+             title, artist, genre, description, lyrics,
              created_at)
-reviews     (id bigserial pk, song_id fk on delete cascade, reviewer_id fk users,
-             score int, text, created_at, updated_at,
+reviews     (id pk, song_id fk on delete cascade, reviewer_id fk users,
+             score integer, text, created_at, updated_at,
              unique (song_id, reviewer_id))
-invites     (id bigserial pk, code unique, is_valid bool, created_at)
-reports     (id bigserial pk, user_id fk not null, body text not null,
+invites     (id pk, code unique, is_valid integer, created_at)
+reports     (id pk, user_id fk not null, body text not null,
              page text, user_agent text,
-             resolved_at timestamptz,   -- null = open
+             resolved_at timestamp,   -- null = open
              created_at)
 ```
 
+`foreign_keys` is off by default in SQLite, so the cascades above only exist because the pragma is
+set on every connection — see `openDB` in `main.go`.
+
 No `role` column (§6). No `status` on `songs` (§4).
 
 Also: `CHECK (score BETWEEN 1 AND 100)`, `NOT NULL` on everything required, an index on
@@ -719,8 +728,8 @@ Everything else is forms and `INSERT`s. No framework, no fixtures beyond a test
 Each step leaves something runnable. Registration needs an invite and invites come from the admin
 panel, so the admin surface comes first — before a single member can exist.
 
-1. **Skeleton** — `main.go`, embedded migrations at startup, pgxpool, slog, Docker Compose, the two
-   listeners.
+1. **Skeleton** — `main.go`, embedded migrations at startup, `database/sql`, slog, Docker Compose,
+   the two listeners.
 2. **Admin, invites, auth** — Basic Auth listener, mint an invite, register, log in, sessions, ban.
 3. **Submission pipeline, upload path only** — submit, convert, waiting page, publish. No yt-dlp yet,
    so the hard parts (worker, publish transaction, restart recovery) are proven without a network
diff --git a/go.mod b/go.mod
index 1b1feb8..8e2f015 100644
--- a/go.mod
+++ b/go.mod
@@ -1,14 +1,20 @@
 module git.kessinen.com/kessinen/levyraati26-go
 
-go 1.24
-
-require github.com/jackc/pgx/v5 v5.7.2
+go 1.25.0
 
 require (
-	github.com/jackc/pgpassfile v1.0.0 // indirect
-	github.com/jackc/pgservicefile v0.0.0-20240606120523-5a60cdf6a761 // indirect
-	github.com/jackc/puddle/v2 v2.2.2 // indirect
-	golang.org/x/crypto v0.32.0 // indirect
-	golang.org/x/sync v0.10.0 // indirect
-	golang.org/x/text v0.21.0 // indirect
+	golang.org/x/crypto v0.32.0
+	modernc.org/sqlite v1.54.0
+)
+
+require (
+	github.com/dustin/go-humanize v1.0.1 // indirect
+	github.com/google/uuid v1.6.0 // indirect
+	github.com/mattn/go-isatty v0.0.20 // indirect
+	github.com/ncruces/go-strftime v1.0.0 // indirect
+	github.com/remyoudompheng/bigfft v0.0.0-20230129092748-24d4a6f8daec // indirect
+	golang.org/x/sys v0.46.0 // indirect
+	modernc.org/libc v1.74.1 // indirect
+	modernc.org/mathutil v1.7.1 // indirect
+	modernc.org/memory v1.11.0 // indirect
 )
diff --git a/go.sum b/go.sum
index b7fc8c6..e2391e7 100644
--- a/go.sum
+++ b/go.sum
@@ -1,6 +1,10 @@
 github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
 github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/dustin/go-humanize v1.0.1 h1:GzkhY7T5VNhEkwH0PVJgjz+fX1rhBrR7pRT3mDkpeCY=
+github.com/dustin/go-humanize v1.0.1/go.mod h1:Mu1zIs6XwVuF/gI1OepvI0qD18qycQx+mFykh5fBlto=
+github.com/google/uuid v1.6.0 h1:NIvaJDMOsjHA8n1jAhLSgzrAzy1Hgr+hNrb57e+94F0=
+github.com/google/uuid v1.6.0/go.mod h1:TIyPZe4MgqvfeYDBFedMoGGpEw/LqOeaOT+nhxU+yHo=
 github.com/jackc/pgpassfile v1.0.0 h1:/6Hmqy13Ss2zCq62VdNG8tM1wchn8zjSGOBJ6icpsIM=
 github.com/jackc/pgpassfile v1.0.0/go.mod h1:CEx0iS5ambNFdcRtxPj5JhEz+xB6uRky5eyVu/W2HEg=
 github.com/jackc/pgservicefile v0.0.0-20240606120523-5a60cdf6a761 h1:iCEnooe7UlwOQYpKFhBabPMi4aNAfoODPEFNiAnClxo=
@@ -9,8 +13,14 @@ github.com/jackc/pgx/v5 v5.7.2 h1:mLoDLV6sonKlvjIEsV56SkWNCnuNv531l94GaIzO+XI=
 github.com/jackc/pgx/v5 v5.7.2/go.mod h1:ncY89UGWxg82EykZUwSpUKEfccBGGYq1xjrOpsbsfGQ=
 github.com/jackc/puddle/v2 v2.2.2 h1:PR8nw+E/1w0GLuRFSmiioY6UooMp6KJv0/61nB7icHo=
 github.com/jackc/puddle/v2 v2.2.2/go.mod h1:vriiEXHvEE654aYKXXjOvZM39qJ0q+azkZFrfEOc3H4=
+github.com/mattn/go-isatty v0.0.20 h1:xfD0iDuEKnDkl03q4limB+vH+GxLEtL/jb4xVJSWWEY=
+github.com/mattn/go-isatty v0.0.20/go.mod h1:W+V8PltTTMOvKvAeJH7IuucS94S2C6jfK/D7dTCTo3Y=
+github.com/ncruces/go-strftime v1.0.0 h1:HMFp8mLCTPp341M/ZnA4qaf7ZlsbTc+miZjCLOFAw7w=
+github.com/ncruces/go-strftime v1.0.0/go.mod h1:Fwc5htZGVVkseilnfgOVb9mKy6w1naJmn9CehxcKcls=
 github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
 github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
+github.com/remyoudompheng/bigfft v0.0.0-20230129092748-24d4a6f8daec h1:W09IVJc94icq4NjY3clb7Lk8O1qJ8BdBEF8z0ibU0rE=
+github.com/remyoudompheng/bigfft v0.0.0-20230129092748-24d4a6f8daec/go.mod h1:qqbHyh8v60DhA7CoWK5oRCqLrMHRGoxYCSS9EjAz6Eo=
 github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
 github.com/stretchr/testify v1.3.0/go.mod h1:M5WIy9Dh21IEIfnGCwXGc5bZfKNJtfHm1UVUgZn+9EI=
 github.com/stretchr/testify v1.7.0/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg=
@@ -20,9 +30,21 @@ golang.org/x/crypto v0.32.0 h1:euUpcYgM8WcP71gNpTqQCn6rC2t6ULUPiOzfWaXVVfc=
 golang.org/x/crypto v0.32.0/go.mod h1:ZnnJkOaASj8g0AjIduWNlq2NRxL0PlBrbKVyZ6V/Ugc=
 golang.org/x/sync v0.10.0 h1:3NQrjDixjgGwUOCaF8w2+VYHv0Ve/vGYSbdkTa98gmQ=
 golang.org/x/sync v0.10.0/go.mod h1:Czt+wKu1gCyEFDUtn0jG5QVvpJ6rzVqr5aXyt9drQfk=
+golang.org/x/sync v0.21.0/go.mod h1:9xrNwdLfx4jkKbNva9FpL6vEN7evnE43NNNJQ2LF3+0=
+golang.org/x/sys v0.6.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
+golang.org/x/sys v0.46.0 h1:noSf2Fq6F8DBgS+LysIkx7rIExoNHJsxOAtPp4rthXw=
+golang.org/x/sys v0.46.0/go.mod h1:4GL1E5IUh+htKOUEOaiffhrAeqysfVGipDYzABqnCmw=
 golang.org/x/text v0.21.0 h1:zyQAAkrwaneQ066sspRyJaG9VNi/YJ1NfzcGB3hZ/qo=
 golang.org/x/text v0.21.0/go.mod h1:4IBbMaMmOPCJ8SecivzSH54+73PCFmPWxNTLm+vZkEQ=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
 gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
 gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
+modernc.org/libc v1.74.1 h1:bdR4VTKFMC4966QSNZ05XLGI/VwzVa2kTUX51Dm0riQ=
+modernc.org/libc v1.74.1/go.mod h1:uH4t5bOx3G3g9Xcmj10YKlTcVISlRDwv8VoQJG9n8Os=
+modernc.org/mathutil v1.7.1 h1:GCZVGXdaN8gTqB1Mf/usp1Y/hSqgI2vAGGP4jZMCxOU=
+modernc.org/mathutil v1.7.1/go.mod h1:4p5IwJITfppl0G4sUEDtCr4DthTaT47/N3aT6MhfgJg=
+modernc.org/memory v1.11.0 h1:o4QC8aMQzmcwCK3t3Ux/ZHmwFPzE6hf2Y5LbkRs+hbI=
+modernc.org/memory v1.11.0/go.mod h1:/JP4VbVC+K5sU2wZi9bHoq2MAkCnrt2r98UGeSK7Mjw=
+modernc.org/sqlite v1.54.0 h1:JCxR4qwkJvOaqAoYcgDoO25Nc+ROg6EJ2LfBVzdrgog=
+modernc.org/sqlite v1.54.0/go.mod h1:4ntCLuNmnH8+GNqjka1wNg7KJd5/Hi5FYp8K+XQ7GZw=
diff --git a/lyrics.go b/lyrics.go
index d5ad22c..1061c94 100644
--- a/lyrics.go
+++ b/lyrics.go
@@ -241,14 +241,14 @@ func (a *app) autoFetchLyrics(ctx context.Context, subID int64, title, artist st
 	if lyrics == "" {
 		return
 	}
-	tag, err := a.pool.Exec(ctx,
+	res, err := a.db.ExecContext(ctx,
 		`update submissions set lyrics = $2 where id = $1 and lyrics is null`,
 		subID, cleanLyrics(lyrics))
 	if err != nil {
 		slog.Error("save lyrics", "ctx", "submissions", "error", err, "submission", subID)
 		return
 	}
-	if tag.RowsAffected() > 0 {
+	if affected(res) > 0 {
 		slog.Info("lyrics found", "ctx", "submissions", "submission", subID)
 	}
 }
diff --git a/main.go b/main.go
index 4b123c5..00b7087 100644
--- a/main.go
+++ b/main.go
@@ -3,22 +3,22 @@ package main
 import (
 	"context"
 	"crypto/subtle"
+	"database/sql"
 	"fmt"
 	"log/slog"
 	"net/http"
 	"os"
 	"path/filepath"
 	"strings"
-	"time"
 
-	"github.com/jackc/pgx/v5/pgxpool"
+	_ "modernc.org/sqlite"
 )
 
 // Set at build time with -ldflags "-X main.version=…". A local `go build` honestly says dev.
 var version = "dev"
 
 type config struct {
-	databaseURL   string
+	dbPath        string
 	adminUser     string
 	adminPass     string
 	addr          string
@@ -32,7 +32,6 @@ type config struct {
 
 func loadConfig() config {
 	c := config{
-		databaseURL:   os.Getenv("DATABASE_URL"),
 		adminUser:     env("ADMIN_USER", "admin"),
 		adminPass:     os.Getenv("ADMIN_PASSWORD"),
 		addr:          env("ADDR", ":8080"),
@@ -41,9 +40,8 @@ func loadConfig() config {
 		secureCookies: env("SECURE_COOKIES", "true") != "false",
 		publicURL:     strings.TrimRight(os.Getenv("PUBLIC_URL"), "/"),
 	}
-	if c.databaseURL == "" {
-		fatal("DATABASE_URL is not set")
-	}
+	// The database lives beside the audio, so one volume is the whole backup.
+	c.dbPath = env("DB_PATH", filepath.Join(c.storageDir, "levyraati.db"))
 	// An admin panel that silently opens is worse than one that won't boot.
 	if c.adminPass == "" {
 		fatal("ADMIN_PASSWORD is not set")
@@ -65,49 +63,67 @@ func fatal(msg string, args ...any) {
 
 type app struct {
 	cfg    config
-	pool   *pgxpool.Pool
+	db     *sql.DB
 	logins limiter // zero value is ready to use
 }
 
+// openDB opens the file with the pragmas the schema assumes. foreign_keys is off by default in
+// SQLite, so without it every `on delete cascade` is decoration; WAL plus busy_timeout is what lets
+// a conversion goroutine write while a request reads; _txlock=immediate takes the write lock at
+// BEGIN rather than failing partway through a transaction that started out reading.
+//
+// _time_format and _timezone make Go write timestamps in exactly the shape datetime('now')
+// produces, so the two sources of a timestamp sort and compare against each other.
+func openDB(path string) (*sql.DB, error) {
+	return sql.Open("sqlite", "file:"+path+"?"+strings.Join([]string{
+		"_pragma=busy_timeout(5000)",
+		"_pragma=journal_mode(WAL)",
+		"_pragma=foreign_keys(1)",
+		"_pragma=synchronous(NORMAL)",
+		"_time_format=datetime",
+		"_timezone=UTC",
+		"_txlock=immediate",
+	}, "&"))
+}
+
+// database/sql splits the row count off into a second return value. Every caller here only asks
+// whether the statement matched anything, and a driver that could not report a count would already
+// have failed at Exec.
+func affected(res sql.Result) int64 {
+	n, _ := res.RowsAffected()
+	return n
+}
+
 func main() {
 	slog.SetDefault(slog.New(slog.NewJSONHandler(os.Stdout, nil)))
 	slog.Info("starting", "ctx", "startup", "version", version)
 	cfg := loadConfig()
 
 	ctx := context.Background()
-	pool, err := pgxpool.New(ctx, cfg.databaseURL)
-	if err != nil {
-		fatal("database connect", "error", err)
-	}
-	defer pool.Close()
-
-	// Wait for Postgres rather than crash-looping past a healthcheck that hasn't gone green yet.
-	for i := 0; ; i++ {
-		pingCtx, cancel := context.WithTimeout(ctx, 3*time.Second)
-		err = pool.Ping(pingCtx)
-		cancel()
-		if err == nil {
-			break
-		}
-		if i == 10 {
-			fatal("database unreachable", "error", err)
-		}
-		time.Sleep(time.Second)
-	}
-
-	if err := migrate(ctx, pool); err != nil {
-		fatal("migrations", "error", err)
-	}
-	if err := sweep(ctx, pool); err != nil {
-		fatal("startup sweep", "error", err)
-	}
+	// The storage directories come first: the database file lives in one of them.
 	for _, dir := range []string{"audio", "tmp", "avatars"} {
 		if err := os.MkdirAll(filepath.Join(cfg.storageDir, dir), 0o755); err != nil {
 			fatal("storage dir", "error", err, "dir", dir)
 		}
 	}
 
-	a := &app{cfg: cfg, pool: pool}
+	db, err := openDB(cfg.dbPath)
+	if err != nil {
+		fatal("database open", "error", err)
+	}
+	defer db.Close()
+	if err := db.PingContext(ctx); err != nil {
+		fatal("database unreachable", "error", err, "path", cfg.dbPath)
+	}
+
+	if err := migrate(ctx, db); err != nil {
+		fatal("migrations", "error", err)
+	}
+	if err := sweep(ctx, db); err != nil {
+		fatal("startup sweep", "error", err)
+	}
+
+	a := &app{cfg: cfg, db: db}
 
 	// ponytail: two listeners, one process. Admin is loopback-only — reach it over an SSH tunnel
 	// or the reverse proxy. A separate binary would need its own deploy and would race the
@@ -127,7 +143,7 @@ func (a *app) memberMux() *http.ServeMux {
 	mux.Handle("GET /static/", http.FileServerFS(assetFS))
 
 	mux.HandleFunc("GET /healthz", func(w http.ResponseWriter, r *http.Request) {
-		if err := a.pool.Ping(r.Context()); err != nil {
+		if err := a.db.PingContext(r.Context()); err != nil {
 			http.Error(w, "db down", http.StatusServiceUnavailable)
 			return
 		}
@@ -195,7 +211,7 @@ func (a *app) adminMux() *http.ServeMux {
 // (close the browser). Add a cookie session if a second admin ever needs one.
 //
 // No bcrypt: hashing protects stored passwords against a database leak, and this one lives in the
-// env file next to the Postgres password already. The constant-time compare is the part that matters.
+// env file already. The constant-time compare is the part that matters.
 func (a *app) requireAdmin(next http.Handler) http.Handler {
 	return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
 		u, p, ok := r.BasicAuth()
diff --git a/main_test.go b/main_test.go
index c8efbd1..b1afe9e 100644
--- a/main_test.go
+++ b/main_test.go
@@ -4,10 +4,7 @@ import (
 	"context"
 	"net/http"
 	"net/http/httptest"
-	"os"
 	"testing"
-
-	"github.com/jackc/pgx/v5/pgxpool"
 )
 
 func TestRequireAdmin(t *testing.T) {
@@ -40,33 +37,19 @@ func TestRequireAdmin(t *testing.T) {
 	}
 }
 
-// Set TEST_DATABASE_URL to run this against a throwaway database.
 func TestMigrateIsIdempotent(t *testing.T) {
-	url := os.Getenv("TEST_DATABASE_URL")
-	if url == "" {
-		t.Skip("TEST_DATABASE_URL not set")
-	}
 	ctx := context.Background()
-	pool, err := pgxpool.New(ctx, url)
-	if err != nil {
-		t.Fatal(err)
-	}
-	defer pool.Close()
+	a := testApp(t) // already migrated once
 
-	if _, err := pool.Exec(ctx, `drop schema public cascade; create schema public`); err != nil {
-		t.Fatal(err)
+	if err := migrate(ctx, a.db); err != nil {
+		t.Fatalf("second migrate: %v", err)
 	}
-	for i := range 2 {
-		if err := migrate(ctx, pool); err != nil {
-			t.Fatalf("migrate run %d: %v", i+1, err)
-		}
-	}
-	if err := sweep(ctx, pool); err != nil {
+	if err := sweep(ctx, a.db); err != nil {
 		t.Fatalf("sweep: %v", err)
 	}
 
 	var n int
-	if err := pool.QueryRow(ctx, `select count(*) from schema_migrations`).Scan(&n); err != nil {
+	if err := a.db.QueryRowContext(ctx, `select count(*) from schema_migrations`).Scan(&n); err != nil {
 		t.Fatal(err)
 	}
 	if n != 1 {
diff --git a/migrate.go b/migrate.go
index 62f108b..9839d93 100644
--- a/migrate.go
+++ b/migrate.go
@@ -2,12 +2,11 @@ package main
 
 import (
 	"context"
+	"database/sql"
 	"embed"
 	"fmt"
 	"log/slog"
 	"sort"
-
-	"github.com/jackc/pgx/v5/pgxpool"
 )
 
 //go:embed migrations/*.sql
@@ -15,17 +14,17 @@ var migrationFS embed.FS
 
 // migrate applies every migrations/*.sql not yet recorded, in filename order, each in its own
 // transaction. Applied names are the record — a file that changes after it ran is not re-applied.
-func migrate(ctx context.Context, pool *pgxpool.Pool) error {
-	_, err := pool.Exec(ctx, `create table if not exists schema_migrations (
+func migrate(ctx context.Context, db *sql.DB) error {
+	_, err := db.ExecContext(ctx, `create table if not exists schema_migrations (
 		name       text primary key,
-		applied_at timestamptz not null default now()
+		applied_at timestamp not null default (datetime('now'))
 	)`)
 	if err != nil {
 		return fmt.Errorf("create schema_migrations: %w", err)
 	}
 
 	applied := map[string]bool{}
-	rows, err := pool.Query(ctx, `select name from schema_migrations`)
+	rows, err := db.QueryContext(ctx, `select name from schema_migrations`)
 	if err != nil {
 		return fmt.Errorf("read schema_migrations: %w", err)
 	}
@@ -60,19 +59,19 @@ func migrate(ctx context.Context, pool *pgxpool.Pool) error {
 		if err != nil {
 			return err
 		}
-		tx, err := pool.Begin(ctx)
+		tx, err := db.BeginTx(ctx, nil)
 		if err != nil {
 			return err
 		}
-		if _, err := tx.Exec(ctx, string(sql)); err != nil {
-			tx.Rollback(ctx)
+		if _, err := tx.ExecContext(ctx, string(sql)); err != nil {
+			tx.Rollback()
 			return fmt.Errorf("migration %s: %w", name, err)
 		}
-		if _, err := tx.Exec(ctx, `insert into schema_migrations (name) values ($1)`, name); err != nil {
-			tx.Rollback(ctx)
+		if _, err := tx.ExecContext(ctx, `insert into schema_migrations (name) values ($1)`, name); err != nil {
+			tx.Rollback()
 			return err
 		}
-		if err := tx.Commit(ctx); err != nil {
+		if err := tx.Commit(); err != nil {
 			return fmt.Errorf("migration %s: %w", name, err)
 		}
 		slog.Info("migration applied", "ctx", "startup", "name", name)
@@ -82,29 +81,31 @@ func migrate(ctx context.Context, pool *pgxpool.Pool) error {
 
 // sweep runs the startup cleanup from docs/spec.md §4.6. An in-process conversion goroutine dies
 // with the process, so without this those rows say "converting" forever.
-func sweep(ctx context.Context, pool *pgxpool.Pool) error {
-	tag, err := pool.Exec(ctx, `update submissions
+func sweep(ctx context.Context, db *sql.DB) error {
+	res, err := db.ExecContext(ctx, `update submissions
 		set status = 'failed', status_msg = 'interrupted by restart'
 		where status in ('queued', 'downloading', 'converting')`)
 	if err != nil {
 		return err
 	}
-	if n := tag.RowsAffected(); n > 0 {
+	if n := affected(res); n > 0 {
 		slog.Warn("submissions interrupted by restart", "ctx", "startup", "count", n)
 	}
 
 	// ponytail: temp files of swept submissions are unlinked with the row in step 3, once the
 	// pipeline exists and there is something to unlink.
-	if _, err := pool.Exec(ctx,
-		`delete from submissions where created_at < now() - interval '7 days'`); err != nil {
+	if _, err := db.ExecContext(ctx,
+		`delete from submissions where created_at < datetime('now', '-7 days')`); err != nil {
 		return err
 	}
-	if _, err := pool.Exec(ctx, `delete from sessions where expires_at < now()`); err != nil {
+	if _, err := db.ExecContext(ctx,
+		`delete from sessions where expires_at < datetime('now')`); err != nil {
 		return err
 	}
 
 	var failed int
-	err = pool.QueryRow(ctx, `select count(*) from submissions where status = 'failed'`).Scan(&failed)
+	err = db.QueryRowContext(ctx,
+		`select count(*) from submissions where status = 'failed'`).Scan(&failed)
 	if err != nil {
 		return err
 	}
diff --git a/migrations/001_init.sql b/migrations/001_init.sql
index 68cf52a..6b05f0e 100644
--- a/migrations/001_init.sql
+++ b/migrations/001_init.sql
@@ -1,52 +1,56 @@
+-- Timestamps are declared `timestamp` and hold UTC 'YYYY-MM-DD HH:MM:SS': the declared type is what
+-- makes the driver hand them back as time.Time, and a fixed-width UTC string is what makes
+-- `order by created_at` and `expires_at > datetime('now')` mean what they say.
+
 create table users (
-    id            bigserial primary key,
-    name          text        not null,
-    email         text        not null unique,
-    password_hash text        not null,
+    id            integer   primary key autoincrement,
+    name          text      not null,
+    email         text      not null unique,
+    password_hash text      not null,
     avatar        text,
-    banned        boolean     not null default false,
-    created_at    timestamptz not null default now()
+    banned        integer   not null default 0,
+    created_at    timestamp not null default (datetime('now'))
 );
 
 create table sessions (
-    token      text        primary key,
-    user_id    bigint      not null references users (id) on delete cascade,
-    idle_ttl   interval    not null,
-    expires_at timestamptz not null,
-    created_at timestamptz not null default now()
+    token      text      primary key,
+    user_id    integer   not null references users (id) on delete cascade,
+    idle_ttl   integer   not null, -- seconds; SQLite has no interval type
+    expires_at timestamp not null,
+    created_at timestamp not null default (datetime('now'))
 );
 
-create index on sessions (user_id);
+create index sessions_user on sessions (user_id);
 
 create table invites (
-    id         bigserial   primary key,
-    code       text        not null unique,
-    is_valid   boolean     not null default true,
-    created_at timestamptz not null default now()
+    id         integer   primary key autoincrement,
+    code       text      not null unique,
+    is_valid   integer   not null default 1,
+    created_at timestamp not null default (datetime('now'))
 );
 
 create table songs (
-    id               bigserial   primary key,
-    title            text        not null,
-    artist           text        not null,
-    genre            text        not null,
+    id               integer   primary key autoincrement,
+    title            text      not null,
+    artist           text      not null,
+    genre            text      not null,
     description      text,
     -- LRC or plain text, told apart by whether the first line starts with '['. Not covered by the
     -- lock: nobody reviewed the lyrics.
     lyrics           text,
-    audio_file       text        not null,
-    duration_seconds integer     not null,
+    audio_file       text      not null,
+    duration_seconds integer   not null,
     source_url       text,
-    submitted_by     bigint      not null references users (id),
-    created_at       timestamptz not null default now()
+    submitted_by     integer   not null references users (id),
+    created_at       timestamp not null default (datetime('now'))
 );
 
-create index on songs (created_at desc);
+create index songs_created_at on songs (created_at desc);
 
 create table submissions (
-    id          bigserial   primary key,
-    user_id     bigint      not null references users (id) on delete cascade,
-    status      text        not null default 'queued',
+    id          integer   primary key autoincrement,
+    user_id     integer   not null references users (id) on delete cascade,
+    status      text      not null default 'queued',
     status_msg  text,
     source_url  text,
     tmp_path    text,
@@ -55,37 +59,37 @@ create table submissions (
     genre       text,
     description text,
     lyrics      text,
-    created_at  timestamptz not null default now(),
+    created_at  timestamp not null default (datetime('now')),
     constraint submissions_status check (
         status in ('queued', 'downloading', 'converting', 'ready', 'failed')
     )
 );
 
 -- The submission quota (5 per rolling 24h, failures excluded) reads this.
-create index on submissions (user_id, created_at desc);
+create index submissions_user_created on submissions (user_id, created_at desc);
 
 create table reviews (
-    id          bigserial   primary key,
-    song_id     bigint      not null references songs (id) on delete cascade,
-    reviewer_id bigint      not null references users (id),
-    score       integer     not null check (score between 1 and 100),
-    text        text        not null,
-    created_at  timestamptz not null default now(),
-    updated_at  timestamptz not null default now(),
+    id          integer   primary key autoincrement,
+    song_id     integer   not null references songs (id) on delete cascade,
+    reviewer_id integer   not null references users (id),
+    score       integer   not null check (score between 1 and 100),
+    text        text      not null,
+    created_at  timestamp not null default (datetime('now')),
+    updated_at  timestamp not null default (datetime('now')),
     unique (song_id, reviewer_id)
 );
 
-create index on reviews (song_id);
+create index reviews_song on reviews (song_id);
 
 -- The queue asks "songs this member has not reviewed" — that lookup is by reviewer.
-create index on reviews (reviewer_id, song_id);
+create index reviews_reviewer_song on reviews (reviewer_id, song_id);
 
 create table reports (
-    id          bigserial   primary key,
-    user_id     bigint      not null references users (id) on delete cascade,
-    body        text        not null,
+    id          integer   primary key autoincrement,
+    user_id     integer   not null references users (id) on delete cascade,
+    body        text      not null,
     page        text,
     user_agent  text,
-    resolved_at timestamptz,
-    created_at  timestamptz not null default now()
+    resolved_at timestamp,
+    created_at  timestamp not null default (datetime('now'))
 );
diff --git a/profile.go b/profile.go
index 5cbf0ee..234800c 100644
--- a/profile.go
+++ b/profile.go
@@ -2,6 +2,7 @@ package main
 
 import (
 	"context"
+	"database/sql"
 	"errors"
 	"io"
 	"log/slog"
@@ -12,7 +13,6 @@ import (
 	"strings"
 	"time"
 
-	"github.com/jackc/pgx/v5"
 	"golang.org/x/crypto/bcrypt"
 )
 
@@ -47,12 +47,12 @@ func (a *app) avatarPath(userID int64) string {
 // per-song opinion is gated, whole-history aggregate is public.
 func (a *app) profile(ctx context.Context, viewerID, userID int64) (*profileView, error) {
 	var p profileView
-	err := a.pool.QueryRow(ctx, `
+	err := a.db.QueryRowContext(ctx, `
 		select u.id, u.name, u.email, u.avatar, u.created_at,
 		       (select count(*) from songs s where s.submitted_by = u.id),
 		       (select count(*) from reviews r where r.reviewer_id = u.id),
-		       (select avg(r.score)::float from reviews r where r.reviewer_id = u.id),
-		       (select avg(r.score)::float from reviews r
+		       (select avg(r.score) from reviews r where r.reviewer_id = u.id),
+		       (select avg(r.score) from reviews r
 		          join songs s on s.id = r.song_id where s.submitted_by = u.id)
 		  from users u where u.id = $1`, userID).
 		Scan(&p.ID, &p.Name, &p.Email, &p.Avatar, &p.CreatedAt,
@@ -67,7 +67,7 @@ func (a *app) profile(ctx context.Context, viewerID, userID int64) (*profileView
 	}
 
 	// Their songs, with the viewer's own reveal rule applied to each average.
-	rows, err := a.pool.Query(ctx, `select`+songColumns+`
+	rows, err := a.db.QueryContext(ctx, `select`+songColumns+`
 		  from songs s join users u on u.id = s.submitted_by
 		 where s.submitted_by = $2
 		 order by s.created_at desc`, viewerID, userID)
@@ -90,7 +90,7 @@ func (a *app) profilePage(w http.ResponseWriter, r *http.Request) {
 		id = parsed
 	}
 	p, err := a.profile(r.Context(), me.ID, id)
-	if errors.Is(err, pgx.ErrNoRows) {
+	if errors.Is(err, sql.ErrNoRows) {
 		http.NotFound(w, r)
 		return
 	} else if err != nil {
@@ -120,7 +120,7 @@ func (a *app) editProfile(w http.ResponseWriter, r *http.Request) {
 		return
 	}
 
-	if _, err := a.pool.Exec(r.Context(),
+	if _, err := a.db.ExecContext(r.Context(),
 		`update users set name = $2, email = $3 where id = $1`, me.ID, name, email); isUnique(err) {
 		a.flash(w, "Sähköpostiosoite on jo käytössä.")
 		http.Redirect(w, r, "/profile", http.StatusSeeOther)
@@ -153,7 +153,7 @@ func (a *app) editProfile(w http.ResponseWriter, r *http.Request) {
 
 func (a *app) changePassword(w http.ResponseWriter, r *http.Request, userID int64, current, next string) bool {
 	var hash string
-	if err := a.pool.QueryRow(r.Context(),
+	if err := a.db.QueryRowContext(r.Context(),
 		`select password_hash from users where id = $1`, userID).Scan(&hash); err != nil {
 		http.Error(w, "virhe", http.StatusInternalServerError)
 		return false
@@ -168,13 +168,13 @@ func (a *app) changePassword(w http.ResponseWriter, r *http.Request, userID int6
 		http.Error(w, "virhe", http.StatusInternalServerError)
 		return false
 	}
-	if _, err := a.pool.Exec(r.Context(),
+	if _, err := a.db.ExecContext(r.Context(),
 		`update users set password_hash = $2 where id = $1`, userID, string(newHash)); err != nil {
 		http.Error(w, "virhe", http.StatusInternalServerError)
 		return false
 	}
 	// Every other session dies; this browser keeps its own.
-	if _, err := a.pool.Exec(r.Context(),
+	if _, err := a.db.ExecContext(r.Context(),
 		`delete from sessions where user_id = $1 and token <> $2`, userID, sessionToken(r)); err != nil {
 		slog.Error("drop sessions", "ctx", "auth", "error", err, "user", userID)
 	}
@@ -202,7 +202,7 @@ func (a *app) saveAvatar(r *http.Request, userID int64, file io.Reader) error {
 	if err := toAvatarJPEG(r.Context(), tmp, out); err != nil {
 		return err
 	}
-	_, err = a.pool.Exec(r.Context(),
+	_, err = a.db.ExecContext(r.Context(),
 		`update users set avatar = $2 where id = $1`, userID, filepath.Base(out))
 	return err
 }
diff --git a/render.go b/render.go
index 84c6f43..012535d 100644
--- a/render.go
+++ b/render.go
@@ -78,8 +78,8 @@ func (a *app) render(w http.ResponseWriter, r *http.Request, status int, name st
 	p.Version = version
 	if p.Member != nil {
 		// The queue is a worklist, so its size belongs in the nav.
-		a.pool.QueryRow(r.Context(), `
-			select count(*)::int from songs s
+		a.db.QueryRowContext(r.Context(), `
+			select count(*) from songs s
 			 where s.submitted_by <> $1
 			   and not exists (select 1 from reviews r
 			                    where r.song_id = s.id and r.reviewer_id = $1)`,
diff --git a/reports.go b/reports.go
index 416434d..d7454c8 100644
--- a/reports.go
+++ b/reports.go
@@ -47,7 +47,7 @@ func (a *app) reportPage(w http.ResponseWriter, r *http.Request) {
 
 // Seeing your own past reports is what stops the same bug arriving four times.
 func (a *app) myReports(ctx context.Context, userID int64) ([]*report, error) {
-	rows, err := a.pool.Query(ctx, `
+	rows, err := a.db.QueryContext(ctx, `
 		select id, body, coalesce(page, ''), resolved_at, created_at
 		  from reports where user_id = $1 order by created_at desc`, userID)
 	if err != nil {
@@ -79,7 +79,7 @@ func (a *app) createReport(w http.ResponseWriter, r *http.Request) {
 	}
 
 	// "Only on my phone" is the most common bug report and this answers it without asking.
-	_, err := a.pool.Exec(r.Context(), `
+	_, err := a.db.ExecContext(r.Context(), `
 		insert into reports (user_id, body, page, user_agent) values ($1, $2, nullif($3, ''), $4)`,
 		me.ID, body, from, clean(r.Header.Get("User-Agent"), 300))
 	if err != nil {
@@ -95,7 +95,7 @@ func (a *app) createReport(w http.ResponseWriter, r *http.Request) {
 // --- admin ---
 
 func (a *app) adminReports(w http.ResponseWriter, r *http.Request) {
-	rows, err := a.pool.Query(r.Context(), `
+	rows, err := a.db.QueryContext(r.Context(), `
 		select rep.id, rep.body, coalesce(rep.page, ''), coalesce(rep.user_agent, ''),
 		       u.name, rep.resolved_at, rep.created_at
 		  from reports rep join users u on u.id = rep.user_id
@@ -130,8 +130,9 @@ func (a *app) resolveReport(w http.ResponseWriter, r *http.Request) {
 		http.NotFound(w, r)
 		return
 	}
-	if _, err := a.pool.Exec(r.Context(),
-		`update reports set resolved_at = case when resolved_at is null then now() end where id = $1`,
+	if _, err := a.db.ExecContext(r.Context(),
+		`update reports set resolved_at = case when resolved_at is null then datetime('now') end
+		  where id = $1`,
 		id); err != nil {
 		adminError(w, "reports", err)
 		return
@@ -147,12 +148,12 @@ func (a *app) adminDeleteSong(w http.ResponseWriter, r *http.Request) {
 		http.NotFound(w, r)
 		return
 	}
-	tag, err := a.pool.Exec(r.Context(), `delete from songs where id = $1`, id)
+	res, err := a.db.ExecContext(r.Context(), `delete from songs where id = $1`, id)
 	if err != nil {
 		adminError(w, "songs", err)
 		return
 	}
-	if tag.RowsAffected() > 0 {
+	if affected(res) > 0 {
 		removeFile(a.audioPath(id))
 		slog.Info("song deleted by admin", "ctx", "songs", "song", id)
 		a.flash(w, "Kappale poistettu.")
@@ -170,9 +171,9 @@ type adminSong struct {
 }
 
 func (a *app) adminSongs(ctx context.Context) ([]adminSong, error) {
-	rows, err := a.pool.Query(ctx, `
+	rows, err := a.db.QueryContext(ctx, `
 		select s.id, s.title, s.artist, u.name,
-		       (select count(*) from reviews r where r.song_id = s.id)::int, s.created_at
+		       (select count(*) from reviews r where r.song_id = s.id), s.created_at
 		  from songs s join users u on u.id = s.submitted_by
 		 order by s.created_at desc`)
 	if err != nil {
diff --git a/reviews.go b/reviews.go
index 1bd1c36..accca6d 100644
--- a/reviews.go
+++ b/reviews.go
@@ -2,14 +2,13 @@ package main
 
 import (
 	"context"
+	"database/sql"
 	"errors"
 	"fmt"
 	"log/slog"
 	"net/http"
 	"strconv"
 	"time"
-
-	"github.com/jackc/pgx/v5"
 )
 
 const (
@@ -17,6 +16,10 @@ const (
 	maxReview  = 5000
 )
 
+// The same window as a SQLite date modifier, for the two statements that enforce it. SQLite has no
+// interval type to bind, so the unit travels in the string.
+var editWindowAgo = fmt.Sprintf("-%d seconds", int(editWindow.Seconds()))
+
 type review struct {
 	ID         int64
 	SongID     int64
@@ -40,7 +43,7 @@ func (r *review) Initials() string {
 }
 
 func (a *app) reviewsFor(ctx context.Context, songID, viewerID int64) ([]*review, error) {
-	rows, err := a.pool.Query(ctx, `
+	rows, err := a.db.QueryContext(ctx, `
 		select r.id, r.song_id, r.reviewer_id, u.name, r.score, r.text, r.created_at, r.updated_at,
 		       r.reviewer_id = $2
 		  from reviews r join users u on u.id = r.reviewer_id
@@ -64,13 +67,13 @@ func (a *app) reviewsFor(ctx context.Context, songID, viewerID int64) ([]*review
 
 func (a *app) viewerReview(ctx context.Context, songID, viewerID int64) (*review, error) {
 	var v review
-	err := a.pool.QueryRow(ctx, `
+	err := a.db.QueryRowContext(ctx, `
 		select r.id, r.song_id, r.reviewer_id, u.name, r.score, r.text, r.created_at, r.updated_at, true
 		  from reviews r join users u on u.id = r.reviewer_id
 		 where r.song_id = $1 and r.reviewer_id = $2`, songID, viewerID).
 		Scan(&v.ID, &v.SongID, &v.ReviewerID, &v.Reviewer, &v.Score, &v.Text,
 			&v.CreatedAt, &v.UpdatedAt, &v.Own)
-	if errors.Is(err, pgx.ErrNoRows) {
+	if errors.Is(err, sql.ErrNoRows) {
 		return nil, nil
 	}
 	return &v, err
@@ -105,8 +108,8 @@ func (a *app) createReview(w http.ResponseWriter, r *http.Request) {
 	// You cannot review your own song, and the unique constraint is what stops a second review —
 	// no read-then-write race to lose.
 	var submitter int64
-	err = a.pool.QueryRow(r.Context(), `select submitted_by from songs where id = $1`, songID).Scan(&submitter)
-	if errors.Is(err, pgx.ErrNoRows) {
+	err = a.db.QueryRowContext(r.Context(), `select submitted_by from songs where id = $1`, songID).Scan(&submitter)
+	if errors.Is(err, sql.ErrNoRows) {
 		http.NotFound(w, r)
 		return
 	} else if err != nil {
@@ -119,7 +122,7 @@ func (a *app) createReview(w http.ResponseWriter, r *http.Request) {
 		return
 	}
 
-	_, err = a.pool.Exec(r.Context(),
+	_, err = a.db.ExecContext(r.Context(),
 		`insert into reviews (song_id, reviewer_id, score, text) values ($1, $2, $3, $4)`,
 		songID, me.ID, score, text)
 	if isUnique(err) {
@@ -153,12 +156,12 @@ func (a *app) editReview(w http.ResponseWriter, r *http.Request) {
 	}
 
 	var songID int64
-	err = a.pool.QueryRow(r.Context(), `
-		update reviews set score = $3, text = $4, updated_at = now()
-		 where id = $1 and reviewer_id = $2 and updated_at > now() - $5::interval
+	err = a.db.QueryRowContext(r.Context(), `
+		update reviews set score = $3, text = $4, updated_at = datetime('now')
+		 where id = $1 and reviewer_id = $2 and updated_at > datetime('now', $5)
 		 returning song_id`,
-		id, memberFrom(r.Context()).ID, score, text, editWindow.String()).Scan(&songID)
-	if errors.Is(err, pgx.ErrNoRows) {
+		id, memberFrom(r.Context()).ID, score, text, editWindowAgo).Scan(&songID)
+	if errors.Is(err, sql.ErrNoRows) {
 		a.flash(w, "Muokkausaika on umpeutunut.")
 		http.Redirect(w, r, r.FormValue("from"), http.StatusSeeOther)
 		return
@@ -180,12 +183,12 @@ func (a *app) deleteReview(w http.ResponseWriter, r *http.Request) {
 		return
 	}
 	var songID int64
-	err = a.pool.QueryRow(r.Context(), `
+	err = a.db.QueryRowContext(r.Context(), `
 		delete from reviews
-		 where id = $1 and reviewer_id = $2 and updated_at > now() - $3::interval
+		 where id = $1 and reviewer_id = $2 and updated_at > datetime('now', $3)
 		 returning song_id`,
-		id, memberFrom(r.Context()).ID, editWindow.String()).Scan(&songID)
-	if errors.Is(err, pgx.ErrNoRows) {
+		id, memberFrom(r.Context()).ID, editWindowAgo).Scan(&songID)
+	if errors.Is(err, sql.ErrNoRows) {
 		a.flash(w, "Muokkausaika on umpeutunut.")
 		http.Redirect(w, r, r.FormValue("from"), http.StatusSeeOther)
 		return
diff --git a/songs.go b/songs.go
index c7bd8eb..f0d5016 100644
--- a/songs.go
+++ b/songs.go
@@ -2,6 +2,7 @@ package main
 
 import (
 	"context"
+	"database/sql"
 	"errors"
 	"fmt"
 	"log/slog"
@@ -9,8 +10,6 @@ import (
 	"os"
 	"strconv"
 	"time"
-
-	"github.com/jackc/pgx/v5"
 )
 
 const pageSize = 20
@@ -52,12 +51,12 @@ const songColumns = `
 	(select count(*) from reviews r where r.song_id = s.id),
 	case when s.submitted_by = $1
 	          or exists (select 1 from reviews r where r.song_id = s.id and r.reviewer_id = $1)
-	     then (select avg(r.score)::float from reviews r where r.song_id = s.id)
+	     then (select avg(r.score) from reviews r where r.song_id = s.id)
 	end,
 	s.submitted_by = $1,
 	exists (select 1 from reviews r where r.song_id = s.id and r.reviewer_id = $1)`
 
-func scanSongs(rows pgx.Rows) ([]*songSummary, error) {
+func scanSongs(rows *sql.Rows) ([]*songSummary, error) {
 	defer rows.Close()
 	var out []*songSummary
 	for rows.Next() {
@@ -74,7 +73,7 @@ func scanSongs(rows pgx.Rows) ([]*songSummary, error) {
 // The queue is a worklist: songs you can still review, oldest first, and never your own — you can
 // never act on those, so they would sit at the front forever.
 func (a *app) queue(ctx context.Context, viewerID, cursor int64) (*songList, error) {
-	rows, err := a.pool.Query(ctx, `select`+songColumns+`
+	rows, err := a.db.QueryContext(ctx, `select`+songColumns+`
 		  from songs s join users u on u.id = s.submitted_by
 		 where s.submitted_by <> $1
 		   and not exists (select 1 from reviews r where r.song_id = s.id and r.reviewer_id = $1)
@@ -93,7 +92,7 @@ func (a *app) queue(ctx context.Context, viewerID, cursor int64) (*songList, err
 
 // Everything, newest first. This is where a song lives once it has left the queue.
 func (a *app) browse(ctx context.Context, viewerID, cursor int64) (*songList, error) {
-	rows, err := a.pool.Query(ctx, `select`+songColumns+`
+	rows, err := a.db.QueryContext(ctx, `select`+songColumns+`
 		  from songs s join users u on u.id = s.submitted_by
 		 where ($2 = 0 or s.id < $2)
 		 order by s.created_at desc, s.id desc
@@ -166,7 +165,7 @@ func (s *songDetail) LyricLines() []lyricLine { return parseLRC(s.Lyrics) }
 
 func (a *app) song(ctx context.Context, viewerID, songID int64) (*songDetail, error) {
 	var d songDetail
-	err := a.pool.QueryRow(ctx, `select`+songColumns+`,
+	err := a.db.QueryRowContext(ctx, `select`+songColumns+`,
 		       coalesce(s.description, ''), coalesce(s.lyrics, ''), s.source_url
 		  from songs s join users u on u.id = s.submitted_by
 		 where s.id = $2`, viewerID, songID).
@@ -207,13 +206,13 @@ func (a *app) song(ctx context.Context, viewerID, songID int64) (*songDetail, er
 // draining the queue never means navigating back to it.
 func (a *app) nextInQueue(ctx context.Context, viewerID, exceptID int64) (int64, error) {
 	var id int64
-	err := a.pool.QueryRow(ctx, `
+	err := a.db.QueryRowContext(ctx, `
 		select s.id from songs s
 		 where s.submitted_by <> $1 and s.id <> $2
 		   and not exists (select 1 from reviews r where r.song_id = s.id and r.reviewer_id = $1)
 		 order by s.created_at, s.id
 		 limit 1`, viewerID, exceptID).Scan(&id)
-	if errors.Is(err, pgx.ErrNoRows) {
+	if errors.Is(err, sql.ErrNoRows) {
 		return 0, nil
 	}
 	return id, err
@@ -226,7 +225,7 @@ func (a *app) songPage(w http.ResponseWriter, r *http.Request) {
 		return
 	}
 	d, err := a.song(r.Context(), memberFrom(r.Context()).ID, id)
-	if errors.Is(err, pgx.ErrNoRows) {
+	if errors.Is(err, sql.ErrNoRows) {
 		http.NotFound(w, r)
 		return
 	} else if err != nil {
@@ -246,7 +245,7 @@ func (a *app) editLyrics(w http.ResponseWriter, r *http.Request) {
 		http.NotFound(w, r)
 		return
 	}
-	tag, err := a.pool.Exec(r.Context(),
+	res, err := a.db.ExecContext(r.Context(),
 		`update songs set lyrics = nullif($3, '') where id = $1 and submitted_by = $2`,
 		id, memberFrom(r.Context()).ID, cleanLyrics(r.FormValue("lyrics")))
 	if err != nil {
@@ -254,7 +253,7 @@ func (a *app) editLyrics(w http.ResponseWriter, r *http.Request) {
 		http.Error(w, "virhe", http.StatusInternalServerError)
 		return
 	}
-	if tag.RowsAffected() == 0 {
+	if affected(res) == 0 {
 		http.NotFound(w, r)
 		return
 	}
@@ -284,7 +283,7 @@ func (a *app) editSong(w http.ResponseWriter, r *http.Request) {
 		return
 	}
 
-	tag, err := a.pool.Exec(r.Context(), `
+	res, err := a.db.ExecContext(r.Context(), `
 		update songs set title = $3, artist = $4, genre = $5, description = nullif($6, '')
 		 where id = $1 and submitted_by = $2
 		   and not exists (select 1 from reviews r where r.song_id = songs.id)`,
@@ -295,7 +294,7 @@ func (a *app) editSong(w http.ResponseWriter, r *http.Request) {
 		http.Error(w, "virhe", http.StatusInternalServerError)
 		return
 	}
-	if tag.RowsAffected() == 0 {
+	if affected(res) == 0 {
 		a.flash(w, "Kappaletta ei voi enää muokata — sitä on jo arvosteltu.")
 	} else {
 		a.flash(w, "Tiedot tallennettu.")
@@ -310,7 +309,7 @@ func (a *app) deleteSong(w http.ResponseWriter, r *http.Request) {
 		http.NotFound(w, r)
 		return
 	}
-	tag, err := a.pool.Exec(r.Context(), `
+	res, err := a.db.ExecContext(r.Context(), `
 		delete from songs where id = $1 and submitted_by = $2
 		  and not exists (select 1 from reviews r where r.song_id = songs.id)`,
 		id, memberFrom(r.Context()).ID)
@@ -319,7 +318,7 @@ func (a *app) deleteSong(w http.ResponseWriter, r *http.Request) {
 		http.Error(w, "virhe", http.StatusInternalServerError)
 		return
 	}
-	if tag.RowsAffected() == 0 {
+	if affected(res) == 0 {
 		a.flash(w, "Kappaletta ei voi enää poistaa — sitä on jo arvosteltu.")
 		http.Redirect(w, r, fmt.Sprintf("/songs/%d", id), http.StatusSeeOther)
 		return
@@ -348,8 +347,8 @@ func (a *app) audio(w http.ResponseWriter, r *http.Request) {
 		return
 	}
 	var name string
-	err = a.pool.QueryRow(r.Context(), `select audio_file from songs where id = $1`, id).Scan(&name)
-	if errors.Is(err, pgx.ErrNoRows) {
+	err = a.db.QueryRowContext(r.Context(), `select audio_file from songs where id = $1`, id).Scan(&name)
+	if errors.Is(err, sql.ErrNoRows) {
 		http.NotFound(w, r)
 		return
 	} else if err != nil {
diff --git a/songs_test.go b/songs_test.go
index ce074b1..2f00e4e 100644
--- a/songs_test.go
+++ b/songs_test.go
@@ -8,7 +8,7 @@ import (
 func (a *app) seedSong(t *testing.T, submitter int64, title string) int64 {
 	t.Helper()
 	var id int64
-	err := a.pool.QueryRow(context.Background(), `
+	err := a.db.QueryRowContext(context.Background(), `
 		insert into songs (title, artist, genre, audio_file, duration_seconds, submitted_by)
 		values ($1, 'Testiartisti', 'Metal', 'x.ogg', 120, $2) returning id`,
 		title, submitter).Scan(&id)
@@ -21,7 +21,7 @@ func (a *app) seedSong(t *testing.T, submitter int64, title string) int64 {
 func (a *app) seedReview(t *testing.T, songID, reviewerID int64, score int) int64 {
 	t.Helper()
 	var id int64
-	err := a.pool.QueryRow(context.Background(), `
+	err := a.db.QueryRowContext(context.Background(), `
 		insert into reviews (song_id, reviewer_id, score, text)
 		values ($1, $2, $3, 'sanat') returning id`, songID, reviewerID, score).Scan(&id)
 	if err != nil {
@@ -133,8 +133,8 @@ func TestQueueContents(t *testing.T) {
 
 	// Oldest first: a second unreviewed song comes after the first.
 	older := a.seedSong(t, bertta, "Vanhempi")
-	if _, err := a.pool.Exec(ctx,
-		`update songs set created_at = now() - interval '2 days' where id = $1`, older); err != nil {
+	if _, err := a.db.ExecContext(ctx,
+		`update songs set created_at = datetime('now', '-2 days') where id = $1`, older); err != nil {
 		t.Fatal(err)
 	}
 	list, err = a.queue(ctx, aino, 0)
@@ -165,7 +165,7 @@ func TestSongUnlocksWhenTheLastReviewGoes(t *testing.T) {
 		t.Fatal("a reviewed song is still editable")
 	}
 
-	if _, err := a.pool.Exec(ctx, `delete from reviews where id = $1`, reviewID); err != nil {
+	if _, err := a.db.ExecContext(ctx, `delete from reviews where id = $1`, reviewID); err != nil {
 		t.Fatal(err)
 	}
 	d, _ = a.song(ctx, aino, songID)
@@ -192,8 +192,8 @@ func TestEditWindow(t *testing.T) {
 	}
 
 	// Just inside the window.
-	if _, err := a.pool.Exec(ctx,
-		`update reviews set updated_at = now() - interval '29 minutes' where id = $1`,
+	if _, err := a.db.ExecContext(ctx,
+		`update reviews set updated_at = datetime('now', '-29 minutes') where id = $1`,
 		reviewID); err != nil {
 		t.Fatal(err)
 	}
@@ -203,8 +203,8 @@ func TestEditWindow(t *testing.T) {
 	}
 
 	// Past it.
-	if _, err := a.pool.Exec(ctx,
-		`update reviews set updated_at = now() - interval '31 minutes' where id = $1`,
+	if _, err := a.db.ExecContext(ctx,
+		`update reviews set updated_at = datetime('now', '-31 minutes') where id = $1`,
 		reviewID); err != nil {
 		t.Fatal(err)
 	}
@@ -215,17 +215,17 @@ func TestEditWindow(t *testing.T) {
 
 	// The database is the authority, not the Go clock: the update and the delete both refuse.
 	var n int64
-	err = a.pool.QueryRow(ctx, `
-		update reviews set score = 1, updated_at = now()
-		 where id = $1 and reviewer_id = $2 and updated_at > now() - $3::interval
-		 returning id`, reviewID, bertta, editWindow.String()).Scan(&n)
+	err = a.db.QueryRowContext(ctx, `
+		update reviews set score = 1, updated_at = datetime('now')
+		 where id = $1 and reviewer_id = $2 and updated_at > datetime('now', $3)
+		 returning id`, reviewID, bertta, editWindowAgo).Scan(&n)
 	if err == nil {
 		t.Fatal("an expired review was edited")
 	}
-	err = a.pool.QueryRow(ctx, `
+	err = a.db.QueryRowContext(ctx, `
 		delete from reviews
-		 where id = $1 and reviewer_id = $2 and updated_at > now() - $3::interval
-		 returning id`, reviewID, bertta, editWindow.String()).Scan(&n)
+		 where id = $1 and reviewer_id = $2 and updated_at > datetime('now', $3)
+		 returning id`, reviewID, bertta, editWindowAgo).Scan(&n)
 	if err == nil {
 		t.Fatal("an expired review was deleted")
 	}
diff --git a/static/style.css b/static/style.css
index 108e4fc..b3a9b03 100644
--- a/static/style.css
+++ b/static/style.css
@@ -743,6 +743,10 @@ td.break { word-break: break-all; font-size: 0.8rem; }
 code { background: var(--surface-raised); padding: 0.1rem var(--space-1);
        border-radius: var(--radius); font-size: 0.85rem; }
 
+/* The link is long and the button must stay reachable next to it on a narrow admin window. */
+.invitecell { display: flex; align-items: center; gap: var(--space-2); flex-wrap: wrap; }
+.invitecell code { word-break: break-all; }
+
 /* --- toasts --- */
 
 .toasts { position: fixed; right: var(--space-4); bottom: var(--space-4); z-index: 1000;
diff --git a/stats.go b/stats.go
index 0700010..ad4a7c2 100644
--- a/stats.go
+++ b/stats.go
@@ -55,13 +55,18 @@ type stats struct {
 	MostProlific []userStat
 }
 
+// SQLite has no stddev aggregate. This is the population formula written out; max() absorbs the
+// tiny negative that floating-point cancellation produces when every score is identical, which
+// would otherwise make sqrt() return null and fail the scan.
+const stddevPop = `sqrt(max(0.0, avg(r.score * r.score) - avg(r.score) * avg(r.score)))`
+
 // Every leaderboard is ordered and limited in SQL, and every one carries a deterministic tie-break:
-// ties are common in a ten-person club, and without one Postgres may return a different ten each
-// time, so the page visibly reshuffles between reloads for no reason.
+// ties are common in a ten-person club, and without one the database may return a different ten
+// each time, so the page visibly reshuffles between reloads for no reason.
 func (a *app) songLeaderboard(ctx context.Context, valueExpr, direction string) ([]songStat, error) {
-	rows, err := a.pool.Query(ctx, `
-		select s.id, s.title, s.artist, `+valueExpr+`::float as value, count(r.id)::int as reviews,
-		       min(r.score)::int, max(r.score)::int
+	rows, err := a.db.QueryContext(ctx, `
+		select s.id, s.title, s.artist, cast(`+valueExpr+` as real) as value,
+		       count(r.id) as reviews, min(r.score), max(r.score)
 		  from songs s join reviews r on r.song_id = s.id
 		 group by s.id
 		having count(r.id) >= $1
@@ -86,8 +91,8 @@ func (a *app) songLeaderboard(ctx context.Context, valueExpr, direction string)
 // Reviewer boards need a minimum too, or one enthusiastic 100 makes someone the most generous
 // member in the club forever.
 func (a *app) reviewerLeaderboard(ctx context.Context, valueExpr, direction string) ([]userStat, error) {
-	rows, err := a.pool.Query(ctx, `
-		select u.id, u.name, u.avatar, `+valueExpr+`::float as value, count(r.id)::int as n
+	rows, err := a.db.QueryContext(ctx, `
+		select u.id, u.name, u.avatar, cast(`+valueExpr+` as real) as value, count(r.id) as n
 		  from users u join reviews r on r.reviewer_id = u.id
 		 group by u.id
 		having count(r.id) >= $1
@@ -109,8 +114,8 @@ func (a *app) reviewerLeaderboard(ctx context.Context, valueExpr, direction stri
 }
 
 func (a *app) mostProlific(ctx context.Context) ([]userStat, error) {
-	rows, err := a.pool.Query(ctx, `
-		select u.id, u.name, u.avatar, count(s.id)::float, count(s.id)::int
+	rows, err := a.db.QueryContext(ctx, `
+		select u.id, u.name, u.avatar, cast(count(s.id) as real), count(s.id)
 		  from users u join songs s on s.submitted_by = u.id
 		 group by u.id
 		 order by count(s.id) desc, u.id asc
@@ -140,11 +145,8 @@ func (a *app) statsPage(w http.ResponseWriter, r *http.Request) {
 	for _, load := range []func() error{
 		func() (err error) { s.TopSongs, err = a.songLeaderboard(ctx, "avg(r.score)", "desc"); return },
 		func() (err error) { s.BottomSongs, err = a.songLeaderboard(ctx, "avg(r.score)", "asc"); return },
-		func() (err error) {
-			s.MostDivisive, err = a.songLeaderboard(ctx, "stddev_pop(r.score)", "desc")
-			return
-		},
-		func() (err error) { s.MostUnified, err = a.songLeaderboard(ctx, "stddev_pop(r.score)", "asc"); return },
+		func() (err error) { s.MostDivisive, err = a.songLeaderboard(ctx, stddevPop, "desc"); return },
+		func() (err error) { s.MostUnified, err = a.songLeaderboard(ctx, stddevPop, "asc"); return },
 		func() (err error) { s.MostReviewed, err = a.songLeaderboard(ctx, "count(r.id)", "desc"); return },
 		func() (err error) { s.Harshest, err = a.reviewerLeaderboard(ctx, "avg(r.score)", "asc"); return },
 		func() (err error) { s.MostGenerous, err = a.reviewerLeaderboard(ctx, "avg(r.score)", "desc"); return },
diff --git a/stats_test.go b/stats_test.go
index d945c3f..b703fc8 100644
--- a/stats_test.go
+++ b/stats_test.go
@@ -51,7 +51,7 @@ func TestLeaderboardThresholdAndOrder(t *testing.T) {
 	}
 
 	// Identical scores everywhere means stddev 0, so unified beats divisive on the same data.
-	unified, err := a.songLeaderboard(ctx, "stddev_pop(r.score)", "asc")
+	unified, err := a.songLeaderboard(ctx, stddevPop, "asc")
 	if err != nil {
 		t.Fatal(err)
 	}
diff --git a/submit.go b/submit.go
index 9d60605..081317f 100644
--- a/submit.go
+++ b/submit.go
@@ -2,6 +2,7 @@ package main
 
 import (
 	"context"
+	"database/sql"
 	"errors"
 	"fmt"
 	"io"
@@ -12,8 +13,6 @@ import (
 	"strconv"
 	"strings"
 	"time"
-
-	"github.com/jackc/pgx/v5"
 )
 
 const (
@@ -147,12 +146,12 @@ func (a *app) submitError(w http.ResponseWriter, r *http.Request, status int, ms
 // from `submissions` is why this also looks at `songs`.
 func (a *app) overQuota(ctx context.Context, userID int64) (bool, error) {
 	var n int
-	err := a.pool.QueryRow(ctx, `
+	err := a.db.QueryRowContext(ctx, `
 		select (select count(*) from submissions
 		         where user_id = $1 and status <> 'failed'
-		           and created_at > now() - interval '24 hours')
+		           and created_at > datetime('now', '-24 hours'))
 		     + (select count(*) from songs
-		         where submitted_by = $1 and created_at > now() - interval '24 hours')`,
+		         where submitted_by = $1 and created_at > datetime('now', '-24 hours'))`,
 		userID).Scan(&n)
 	return n >= maxPerDay, err
 }
@@ -196,7 +195,7 @@ func (a *app) submit(w http.ResponseWriter, r *http.Request) {
 	defer file.Close()
 
 	var subID int64
-	err = a.pool.QueryRow(r.Context(),
+	err = a.db.QueryRowContext(r.Context(),
 		`insert into submissions (user_id, status) values ($1, 'queued') returning id`,
 		m.ID).Scan(&subID)
 	if err != nil {
@@ -236,7 +235,7 @@ func (a *app) submit(w http.ResponseWriter, r *http.Request) {
 		return
 	}
 
-	if _, err := a.pool.Exec(r.Context(),
+	if _, err := a.db.ExecContext(r.Context(),
 		`update submissions set tmp_path = $2, title = nullif($3, ''), artist = nullif($4, '')
 		  where id = $1`, subID, src, meta.Title, meta.Artist); err != nil {
 		slog.Error("save metadata", "ctx", "submissions", "error", err, "submission", subID)
@@ -268,7 +267,7 @@ func (a *app) submitURL(w http.ResponseWriter, r *http.Request, userID int64, ra
 	}
 
 	var subID int64
-	err = a.pool.QueryRow(r.Context(), `
+	err = a.db.QueryRowContext(r.Context(), `
 		insert into submissions (user_id, status, source_url, title, artist)
 		values ($1, 'queued', $2, nullif($3, ''), nullif($4, '')) returning id`,
 		userID, link, meta.Title, meta.Artist).Scan(&subID)
@@ -294,7 +293,7 @@ func (a *app) retry(w http.ResponseWriter, r *http.Request) {
 		http.Error(w, "ei uudelleenyritettävissä", http.StatusConflict)
 		return
 	}
-	if _, err := a.pool.Exec(r.Context(),
+	if _, err := a.db.ExecContext(r.Context(),
 		`update submissions set status = 'queued', status_msg = null where id = $1`, s.ID); err != nil {
 		slog.Error("retry", "ctx", "submissions", "error", err, "submission", s.ID)
 		http.Error(w, "virhe", http.StatusInternalServerError)
@@ -309,7 +308,7 @@ func (a *app) discardSubmission(ctx context.Context, subID int64, path string) {
 	if path != "" {
 		os.Remove(path)
 	}
-	if _, err := a.pool.Exec(ctx, `delete from submissions where id = $1`, subID); err != nil {
+	if _, err := a.db.ExecContext(ctx, `delete from submissions where id = $1`, subID); err != nil {
 		slog.Error("discard submission", "ctx", "submissions", "error", err, "submission", subID)
 	}
 }
@@ -348,7 +347,7 @@ func (a *app) process(subID int64, sourceURL, src string) {
 			a.setStatus(ctx, subID, "failed", "lataus ei tuottanut tiedostoa")
 			return
 		}
-		if _, err := a.pool.Exec(ctx,
+		if _, err := a.db.ExecContext(ctx,
 			`update submissions set tmp_path = $2 where id = $1`, subID, src); err != nil {
 			slog.Error("save tmp path", "ctx", "submissions", "error", err, "submission", subID)
 		}
@@ -370,7 +369,7 @@ func (a *app) process(subID int64, sourceURL, src string) {
 	// The original is discarded as soon as the Opus exists.
 	os.Remove(src)
 
-	if _, err := a.pool.Exec(ctx,
+	if _, err := a.db.ExecContext(ctx,
 		`update submissions set status = 'ready', status_msg = null, tmp_path = $2 where id = $1`,
 		subID, out); err != nil {
 		slog.Error("mark ready", "ctx", "submissions", "error", err, "submission", subID)
@@ -382,7 +381,7 @@ func (a *app) process(subID int64, sourceURL, src string) {
 	// so it covers well-tagged music; the Hae sanoitukset button on the waiting page is what
 	// covers everything else, once the submitter has fixed the title and artist.
 	var title, artist string
-	if err := a.pool.QueryRow(ctx,
+	if err := a.db.QueryRowContext(ctx,
 		`select coalesce(title, ''), coalesce(artist, '') from submissions where id = $1`,
 		subID).Scan(&title, &artist); err != nil {
 		return
@@ -395,7 +394,7 @@ func (a *app) process(subID int64, sourceURL, src string) {
 }
 
 func (a *app) setStatus(ctx context.Context, subID int64, status, msg string) {
-	if _, err := a.pool.Exec(ctx,
+	if _, err := a.db.ExecContext(ctx,
 		`update submissions set status = $2, status_msg = nullif($3, '') where id = $1`,
 		subID, status, msg); err != nil {
 		slog.Error("set status", "ctx", "submissions", "error", err, "submission", subID)
@@ -412,14 +411,14 @@ func (a *app) loadSubmission(w http.ResponseWriter, r *http.Request) *submission
 		return nil
 	}
 	var s submission
-	err = a.pool.QueryRow(r.Context(), `
+	err = a.db.QueryRowContext(r.Context(), `
 		select id, user_id, status, status_msg, source_url, coalesce(tmp_path, ''),
 		       coalesce(title, ''), coalesce(artist, ''), coalesce(genre, ''),
 		       coalesce(description, ''), coalesce(lyrics, ''), created_at
 		  from submissions where id = $1`, id).
 		Scan(&s.ID, &s.UserID, &s.Status, &s.StatusMsg, &s.SourceURL, &s.TmpPath,
 			&s.Title, &s.Artist, &s.Genre, &s.Description, &s.Lyrics, &s.CreatedAt)
-	if errors.Is(err, pgx.ErrNoRows) {
+	if errors.Is(err, sql.ErrNoRows) {
 		http.NotFound(w, r)
 		return nil
 	} else if err != nil {
@@ -473,7 +472,7 @@ func (a *app) saveMetadata(ctx context.Context, subID int64, r *http.Request) er
 	// worker had just fetched.
 	has := func(field string) bool { _, ok := r.Form[field]; return ok }
 
-	_, err := a.pool.Exec(ctx, `
+	_, err := a.db.ExecContext(ctx, `
 		update submissions set
 		       title       = case when $2 then nullif($3, '') else title end,
 		       artist      = case when $4 then nullif($5, '') else artist end,
@@ -557,16 +556,16 @@ func (a *app) publish(w http.ResponseWriter, r *http.Request) {
 		return
 	}
 
-	tx, err := a.pool.Begin(r.Context())
+	tx, err := a.db.BeginTx(r.Context(), nil)
 	if err != nil {
 		slog.Error("begin publish", "ctx", "submissions", "error", err)
 		http.Error(w, "virhe", http.StatusInternalServerError)
 		return
 	}
-	defer tx.Rollback(r.Context())
+	defer tx.Rollback()
 
 	var songID int64
-	err = tx.QueryRow(r.Context(), `
+	err = tx.QueryRowContext(r.Context(), `
 		insert into songs (title, artist, genre, description, lyrics, audio_file, duration_seconds,
 		                   source_url, submitted_by)
 		values ($1, $2, $3, $4, $5, '', $6, $7, $8) returning id`,
@@ -587,7 +586,7 @@ func (a *app) publish(w http.ResponseWriter, r *http.Request) {
 		http.Error(w, "virhe", http.StatusInternalServerError)
 		return
 	}
-	if _, err := tx.Exec(r.Context(),
+	if _, err := tx.ExecContext(r.Context(),
 		`update songs set audio_file = $2 where id = $1`,
 		songID, filepath.Base(dst)); err != nil {
 		os.Rename(dst, src)
@@ -595,13 +594,13 @@ func (a *app) publish(w http.ResponseWriter, r *http.Request) {
 		http.Error(w, "virhe", http.StatusInternalServerError)
 		return
 	}
-	if _, err := tx.Exec(r.Context(), `delete from submissions where id = $1`, s.ID); err != nil {
+	if _, err := tx.ExecContext(r.Context(), `delete from submissions where id = $1`, s.ID); err != nil {
 		os.Rename(dst, src)
 		slog.Error("delete submission", "ctx", "submissions", "error", err, "submission", s.ID)
 		http.Error(w, "virhe", http.StatusInternalServerError)
 		return
 	}
-	if err := tx.Commit(r.Context()); err != nil {
+	if err := tx.Commit(); err != nil {
 		os.Rename(dst, src)
 		slog.Error("commit publish", "ctx", "songs", "error", err, "submission", s.ID)
 		http.Error(w, "virhe", http.StatusInternalServerError)
@@ -635,7 +634,7 @@ func nilIfEmpty(s string) *string {
 
 // Own in-flight submissions, for the home page — otherwise a submission is only reachable by URL.
 func (a *app) mySubmissions(ctx context.Context, userID int64) ([]*submission, error) {
-	rows, err := a.pool.Query(ctx, `
+	rows, err := a.db.QueryContext(ctx, `
 		select id, user_id, status, status_msg, source_url, coalesce(tmp_path, ''),
 		       coalesce(title, ''), coalesce(artist, ''), coalesce(genre, ''),
 		       coalesce(description, ''), created_at
diff --git a/submit_test.go b/submit_test.go
index 7212d04..617981b 100644
--- a/submit_test.go
+++ b/submit_test.go
@@ -49,7 +49,7 @@ func makeAudio(t *testing.T, path string) {
 func (a *app) readySubmission(t *testing.T, userID int64) *submission {
 	t.Helper()
 	var id int64
-	err := a.pool.QueryRow(context.Background(), `
+	err := a.db.QueryRowContext(context.Background(), `
 		insert into submissions (user_id, status, title, artist, genre)
 		values ($1, 'ready', 'Testikappale', 'Testiartisti', 'Metal') returning id`,
 		userID).Scan(&id)
@@ -58,7 +58,7 @@ func (a *app) readySubmission(t *testing.T, userID int64) *submission {
 	}
 	path := a.tmpPath(id, ".ogg")
 	makeAudio(t, path)
-	if _, err := a.pool.Exec(context.Background(),
+	if _, err := a.db.ExecContext(context.Background(),
 		`update submissions set tmp_path = $2 where id = $1`, id, path); err != nil {
 		t.Fatal(err)
 	}
@@ -96,13 +96,13 @@ func TestPublishIsAllOrNothing(t *testing.T) {
 		t.Fatalf("publish with an unwritable audio dir: status = %d, want 500", w.Code)
 	}
 	var songs, submissions int
-	if err := a.pool.QueryRow(ctx, `select count(*) from songs`).Scan(&songs); err != nil {
+	if err := a.db.QueryRowContext(ctx, `select count(*) from songs`).Scan(&songs); err != nil {
 		t.Fatal(err)
 	}
 	if songs != 0 {
 		t.Fatalf("orphan song row: %d rows with no audio file", songs)
 	}
-	if err := a.pool.QueryRow(ctx, `select count(*) from submissions`).Scan(&submissions); err != nil {
+	if err := a.db.QueryRowContext(ctx, `select count(*) from submissions`).Scan(&submissions); err != nil {
 		t.Fatal(err)
 	}
 	if submissions != 1 {
@@ -120,13 +120,13 @@ func TestPublishIsAllOrNothing(t *testing.T) {
 		t.Fatalf("publish: status = %d, want 303", w.Code)
 	}
 	var songID int64
-	if err := a.pool.QueryRow(ctx, `select id from songs`).Scan(&songID); err != nil {
+	if err := a.db.QueryRowContext(ctx, `select id from songs`).Scan(&songID); err != nil {
 		t.Fatal(err)
 	}
 	if _, err := os.Stat(a.audioPath(songID)); err != nil {
 		t.Fatalf("published song has no audio file: %v", err)
 	}
-	if err := a.pool.QueryRow(ctx, `select count(*) from submissions`).Scan(&submissions); err != nil {
+	if err := a.db.QueryRowContext(ctx, `select count(*) from submissions`).Scan(&submissions); err != nil {
 		t.Fatal(err)
 	}
 	if submissions != 0 {
@@ -154,7 +154,7 @@ func TestSubmissionQuota(t *testing.T) {
 	check(false, "no submissions")
 
 	for range 4 {
-		if _, err := a.pool.Exec(ctx,
+		if _, err := a.db.ExecContext(ctx,
 			`insert into submissions (user_id, status) values ($1, 'ready')`, id); err != nil {
 			t.Fatal(err)
 		}
@@ -163,7 +163,7 @@ func TestSubmissionQuota(t *testing.T) {
 
 	// Failures never count — yt-dlp rot and bad files are not the submitter's fault.
 	for range 10 {
-		if _, err := a.pool.Exec(ctx,
+		if _, err := a.db.ExecContext(ctx,
 			`insert into submissions (user_id, status) values ($1, 'failed')`, id); err != nil {
 			t.Fatal(err)
 		}
@@ -171,7 +171,7 @@ func TestSubmissionQuota(t *testing.T) {
 	check(false, "failures do not count")
 
 	// A published song still occupies a slot, even though its submission row is gone.
-	if _, err := a.pool.Exec(ctx, `
+	if _, err := a.db.ExecContext(ctx, `
 		insert into songs (title, artist, genre, audio_file, duration_seconds, submitted_by)
 		values ('T', 'A', 'Metal', '1.ogg', 60, $1)`, id); err != nil {
 		t.Fatal(err)
@@ -179,8 +179,8 @@ func TestSubmissionQuota(t *testing.T) {
 	check(true, "four in flight plus one published")
 
 	// Yesterday's submissions are outside the window.
-	if _, err := a.pool.Exec(ctx,
-		`update submissions set created_at = now() - interval '25 hours' where user_id = $1`,
+	if _, err := a.db.ExecContext(ctx,
+		`update submissions set created_at = datetime('now', '-25 hours') where user_id = $1`,
 		id); err != nil {
 		t.Fatal(err)
 	}
@@ -194,17 +194,17 @@ func TestRestartRecovery(t *testing.T) {
 	id := a.seedMember(t, "esa@example.com")
 
 	for _, status := range []string{"queued", "downloading", "converting"} {
-		if _, err := a.pool.Exec(ctx,
+		if _, err := a.db.ExecContext(ctx,
 			`insert into submissions (user_id, status) values ($1, $2)`, id, status); err != nil {
 			t.Fatal(err)
 		}
 	}
-	if err := sweep(ctx, a.pool); err != nil {
+	if err := sweep(ctx, a.db); err != nil {
 		t.Fatal(err)
 	}
 
 	var stuck int
-	if err := a.pool.QueryRow(ctx,
+	if err := a.db.QueryRowContext(ctx,
 		`select count(*) from submissions where status <> 'failed'`).Scan(&stuck); err != nil {
 		t.Fatal(err)
 	}
@@ -212,7 +212,7 @@ func TestRestartRecovery(t *testing.T) {
 		t.Fatalf("%d submissions survived the sweep still in flight", stuck)
 	}
 	var msg string
-	if err := a.pool.QueryRow(ctx,
+	if err := a.db.QueryRowContext(ctx,
 		`select status_msg from submissions limit 1`).Scan(&msg); err != nil {
 		t.Fatal(err)
 	}
diff --git a/templates/admin.html b/templates/admin.html
index 47da7ec..d7eee55 100644
--- a/templates/admin.html
+++ b/templates/admin.html
@@ -13,8 +13,11 @@
     <tbody>
       {{range .Data.Invites}}
         <tr>
-          <td>
-            <a href="{{.Link}}">{{.Link}}</a>
+          <!-- Not a link: an invite is something to send, never to follow. A click used to open the
+               join form in the admin's own browser, which is never what was wanted. -->
+          <td class="invitecell">
+            <code>{{.Link}}</code>
+            <button type="button" class="ghost" onclick="copyInvite(this)">Kopioi</button>
           </td>
           <td class="nowrap"><span class="dot on"></span> käyttämätön</td>
           <td>{{fidate .CreatedAt}}</td>
@@ -87,4 +90,29 @@
   </div>
 </section>
 
+<script>
+  // The clipboard API needs a secure context. Over the documented SSH tunnel the origin is
+  // localhost, which qualifies; reached any other way it is missing, so selecting the text is the
+  // fallback — the admin presses Ctrl+C instead of being left with a button that does nothing.
+  function copyInvite(button) {
+    const link = button.previousElementSibling;
+    const done = () => {
+      button.textContent = 'Kopioitu';
+      setTimeout(() => { button.textContent = 'Kopioi'; }, 1500);
+    };
+    if (navigator.clipboard) {
+      navigator.clipboard.writeText(link.textContent).then(done, () => selectText(link));
+    } else {
+      selectText(link);
+    }
+  }
+
+  function selectText(el) {
+    const range = document.createRange();
+    range.selectNodeContents(el);
+    const sel = window.getSelection();
+    sel.removeAllRanges();
+    sel.addRange(range);
+  }
+</script>
 {{end}}
diff --git a/templates/layout.html b/templates/layout.html
index 4d3220f..9a21ebf 100644
--- a/templates/layout.html
+++ b/templates/layout.html
@@ -62,7 +62,7 @@
   <footer class="sitefooter">
     {{if .Member}}
       <!-- The server already knows where they were, so the path travels in the link — no JS. -->
-      <a href="/report?from={{.Path}}">Ilmoita ongelmasta</a> ·
+      <a href="/report?from={{.Path}}">Ongelmia? Ideoita? Palautetta?</a> ·
     {{end}}
     <span class="slogan">We know good music, baby!</span>
     <span class="copyright">© Kessinen</span>
diff --git a/templates/report.html b/templates/report.html
index 5bda6c4..81a1dc4 100644
--- a/templates/report.html
+++ b/templates/report.html
@@ -1,13 +1,13 @@
 {{define "content"}}
 <h1>Palaute</h1>
-<p class="muted">Kerro mikä on rikki tai ärsyttää. Ei kategorioita eikä prioriteetteja — yksi
-  virke riittää.</p>
+<p class="muted">Ongelmat, ideat ja kaikki muu palaute samaan paikkaan. Ei kategorioita eikä
+  prioriteetteja — yksi virke riittää.</p>
 
 <form method="post" action="/report" class="stack">
   <input type="hidden" name="from" value="{{.Data.From}}">
   <label>Palaute
     <textarea name="body" rows="6" maxlength="2000" required autofocus
-              placeholder="Esim. soitin ei toimi puhelimella."></textarea>
+              placeholder="Esim. soittimeen kaipaisi kelausta."></textarea>
   </label>
   <button type="submit">Lähetä palaute</button>
 </form>
diff --git a/templates/song.html b/templates/song.html
index f89176c..145dc7b 100644
--- a/templates/song.html
+++ b/templates/song.html
@@ -74,7 +74,8 @@
   {{with $s.Description}}<p class="intro">{{.}}</p>{{end}}
 {{end}}
 
-{{with $s.SourceURL}}<p class="muted small"><a href="{{.}}" rel="noreferrer">Kuuntele YouTubessa</a></p>{{end}}
+{{/* New tab: leaving the page mid-review would lose whatever is already typed in the form. */}}
+{{with $s.SourceURL}}<p class="muted small"><a href="{{.}}" target="_blank" rel="noreferrer">Kuuntele YouTubessa</a></p>{{end}}
 
 {{if and (not $s.CanReview) (or $s.Lyrics $s.Own)}}
 <!-- Only when the review strip is not already showing them: while reviewing, the lyrics live in