diff --git a/boker/__init__.py b/boker/__init__.py
index a1cc031..b68942d 100644
--- a/boker/__init__.py
+++ b/boker/__init__.py
@@ -13,6 +13,7 @@ from .extensions import csrf, limiter, mail
 from .routes.account import account_bp
 from .routes.leagues import leagues_bp
 from .routes.public import public_bp
+from .routes.site_admin import site_admin_bp
 from .storage import ensure_data_file
 from .utils import cents_to_dollars, safe_date_label
 
@@ -44,6 +45,7 @@ def create_app(config_overrides: dict | None = None) -> Flask:
     app.register_blueprint(public_bp)
     app.register_blueprint(account_bp)
     app.register_blueprint(leagues_bp)
+    app.register_blueprint(site_admin_bp)
 
     @app.cli.command("init-db")
     def init_db_command() -> None:
diff --git a/boker/auth.py b/boker/auth.py
index c33f1f1..14c9794 100644
--- a/boker/auth.py
+++ b/boker/auth.py
@@ -77,3 +77,28 @@ def login_required(view):
         return view(*args, **kwargs)
 
     return wrapped_view
+
+
+def current_user_is_site_admin() -> bool:
+    user_id = current_user_id()
+    if not user_id:
+        return False
+    from .db import db
+    from .db_models import User
+    if db is None:
+        return False
+    user = db.session.get(User, user_id)
+    return bool(user and user.is_site_admin and user.disabled_at is None)
+
+
+def site_admin_required(view):
+    @wraps(view)
+    def wrapped_view(*args, **kwargs):
+        if not is_logged_in():
+            return redirect(url_for("account.login", next=request.full_path))
+        if not current_user_is_site_admin():
+            from flask import abort
+            abort(403)
+        return view(*args, **kwargs)
+
+    return wrapped_view
diff --git a/boker/config.py b/boker/config.py
index 0730954..a5f5c85 100644
--- a/boker/config.py
+++ b/boker/config.py
@@ -9,7 +9,7 @@ DATA_PATH = BASE_DIR / "data" / "entries.csv"
 DEFAULT_DATABASE_URL = f"sqlite:///{BASE_DIR / 'data' / 'boker-dev.sqlite3'}"
 
 ELIGIBLE_MIN_SESSIONS = 3
-APP_VERSION = "2.3.1"
+APP_VERSION = "2.4.3"
 
 
 def load_local_env(env_path: Path) -> None:
diff --git a/boker/db_models.py b/boker/db_models.py
index 229ebe9..98e4fc6 100644
--- a/boker/db_models.py
+++ b/boker/db_models.py
@@ -75,6 +75,7 @@ class User(TimestampMixin, db.Model):
     email_verified_at = db.Column(db.DateTime(timezone=True), nullable=True)
     last_login_at = db.Column(db.DateTime(timezone=True), nullable=True)
     disabled_at = db.Column(db.DateTime(timezone=True), nullable=True)
+    is_site_admin = db.Column(db.Boolean, nullable=False, default=False)
 
 
 class League(TimestampMixin, db.Model):
diff --git a/boker/repositories/leagues.py b/boker/repositories/leagues.py
index b23dbc3..176c9c4 100644
--- a/boker/repositories/leagues.py
+++ b/boker/repositories/leagues.py
@@ -322,3 +322,23 @@ def remove_league_member(league_id: str, user_id: str) -> None:
     ).one_or_none()
     if membership and membership.role != "owner":
         membership.disabled_at = utc_now()
+
+
+def transfer_league_ownership(league_id: str, new_owner_user_id: str) -> None:
+    current_owner = LeagueMembership.query.filter_by(
+        league_id=league_id,
+        role="owner",
+        disabled_at=None,
+    ).one_or_none()
+    new_owner_membership = LeagueMembership.query.filter_by(
+        league_id=league_id,
+        user_id=new_owner_user_id,
+        disabled_at=None,
+    ).one_or_none()
+    if current_owner is None or new_owner_membership is None:
+        raise ValueError("Invalid transfer: owner or target not found.")
+    league = db.session.get(League, league_id)
+    if league:
+        league.created_by_user_id = new_owner_user_id
+    current_owner.role = "manager"
+    new_owner_membership.role = "owner"
diff --git a/boker/routes/leagues.py b/boker/routes/leagues.py
index 4d46c83..d868fb8 100644
--- a/boker/routes/leagues.py
+++ b/boker/routes/leagues.py
@@ -1127,7 +1127,8 @@ def league_settings(league_ref: str):
     from ..repositories.leagues import list_members_for_league
 
     members = list_members_for_league(league.id)
-    return render_template("league_settings.html", league=league, form=form, is_owner=True, members=members)
+    has_managers = any(m.role == "manager" for m, u in members)
+    return render_template("league_settings.html", league=league, form=form, is_owner=True, members=members, has_managers=has_managers)
 
 
 @leagues_bp.post("/l/<league_ref>/settings/invite")
@@ -1196,6 +1197,37 @@ def remove_member(league_ref: str, user_id: str):
     return redirect(url_for("leagues.league_settings", league_ref=league.url_ref))
 
 
+@leagues_bp.post("/l/<league_ref>/settings/transfer")
+@login_required
+def transfer_ownership(league_ref: str):
+    if not db_ready():
+        flash("League database is not available.", "error")
+        return redirect(url_for("public.home"))
+
+    from ..repositories.leagues import find_membership, transfer_league_ownership
+
+    league = require_league(league_ref, {"owner"})
+    new_owner_id = request.form.get("new_owner_user_id", "").strip()
+
+    if not new_owner_id:
+        flash("Select a manager to transfer ownership to.", "error")
+        return redirect(url_for("leagues.league_settings", league_ref=league.url_ref))
+
+    membership = find_membership(league.id, new_owner_id)
+    if membership is None or membership.role != "manager":
+        flash("Target user must be a manager of this league.", "error")
+        return redirect(url_for("leagues.league_settings", league_ref=league.url_ref))
+
+    try:
+        transfer_league_ownership(league.id, new_owner_id)
+        db.session.commit()
+        flash("Ownership transferred. You are now a manager of this league.", "success")
+    except ValueError as exc:
+        flash(str(exc), "error")
+
+    return redirect(url_for("leagues.dashboard", **league_url_values(league)))
+
+
 @leagues_bp.post("/l/<league_ref>/archive")
 @login_required
 def archive_league(league_ref: str):
diff --git a/boker/routes/site_admin.py b/boker/routes/site_admin.py
new file mode 100644
index 0000000..1e9f4e7
--- /dev/null
+++ b/boker/routes/site_admin.py
@@ -0,0 +1,614 @@
+#!/usr/bin/env python3
+from __future__ import annotations
+
+import json
+from datetime import datetime, timedelta, timezone
+
+from flask import Blueprint, flash, redirect, render_template, request, url_for
+
+from ..auth import (
+    current_user_id,
+    generate_reset_token,
+    hash_password,
+    normalize_email,
+    site_admin_required,
+)
+from ..db import db
+
+site_admin_bp = Blueprint("site_admin", __name__, url_prefix="/admin")
+
+
+def utc_now() -> datetime:
+    return datetime.now(timezone.utc)
+
+
+@site_admin_bp.get("/")
+def index():
+    return redirect(url_for("site_admin.dashboard"))
+
+
+@site_admin_bp.get("/dashboard")
+@site_admin_required
+def dashboard():
+    from ..db_models import League, LedgerEvent, LeagueMembership, PokerSession, User
+
+    now = utc_now()
+    day_ago = now - timedelta(days=1)
+    week_ago = now - timedelta(days=7)
+    month_ago = now - timedelta(days=30)
+
+    total_users = db.session.query(db.func.count(User.id)).scalar() or 0
+    active_users = db.session.query(db.func.count(User.id)).filter(User.disabled_at.is_(None)).scalar() or 0
+    disabled_users = total_users - active_users
+    new_users_7d = db.session.query(db.func.count(User.id)).filter(User.created_at >= week_ago).scalar() or 0
+    new_users_30d = db.session.query(db.func.count(User.id)).filter(User.created_at >= month_ago).scalar() or 0
+    admin_count = db.session.query(db.func.count(User.id)).filter(User.is_site_admin.is_(True)).scalar() or 0
+
+    dau = db.session.query(db.func.count(User.id)).filter(User.last_login_at >= day_ago).scalar() or 0
+    wau = db.session.query(db.func.count(User.id)).filter(User.last_login_at >= week_ago).scalar() or 0
+    mau = db.session.query(db.func.count(User.id)).filter(User.last_login_at >= month_ago).scalar() or 0
+
+    total_leagues = db.session.query(db.func.count(League.id)).scalar() or 0
+    active_leagues = db.session.query(db.func.count(League.id)).filter(League.archived_at.is_(None)).scalar() or 0
+    public_leagues = db.session.query(db.func.count(League.id)).filter(
+        League.visibility == "public", League.archived_at.is_(None)
+    ).scalar() or 0
+    new_leagues_30d = db.session.query(db.func.count(League.id)).filter(League.created_at >= month_ago).scalar() or 0
+
+    total_sessions = db.session.query(db.func.count(PokerSession.id)).scalar() or 0
+    open_sessions = db.session.query(db.func.count(PokerSession.id)).filter(PokerSession.status == "open").scalar() or 0
+
+    total_events = db.session.query(db.func.count(LedgerEvent.id)).filter(LedgerEvent.voided_at.is_(None)).scalar() or 0
+
+    league_session_rows = db.session.query(
+        PokerSession.league_id, db.func.count(PokerSession.id)
+    ).group_by(PokerSession.league_id).all()
+    avg_sessions_per_league = round(
+        sum(r[1] for r in league_session_rows) / len(league_session_rows), 1
+    ) if league_session_rows else 0
+
+    league_buyin_rows = db.session.query(
+        LedgerEvent.league_id, db.func.sum(LedgerEvent.amount_cents)
+    ).filter(
+        LedgerEvent.event_type == "buyin",
+        LedgerEvent.voided_at.is_(None),
+    ).group_by(LedgerEvent.league_id).all()
+    avg_buyin_cents = int(
+        sum(r[1] for r in league_buyin_rows) / len(league_buyin_rows)
+    ) if league_buyin_rows else 0
+
+    today = now.date()
+    chart_days = [today - timedelta(days=i) for i in range(29, -1, -1)]
+    chart_labels = [d.strftime("%b %d") for d in chart_days]
+    chart_iso = [d.isoformat() for d in chart_days]
+
+    signup_raw = db.session.query(
+        db.func.date(User.created_at),
+        db.func.count(User.id),
+    ).filter(User.created_at >= month_ago).group_by(db.func.date(User.created_at)).all()
+    signup_by_day = {
+        (r[0].isoformat() if hasattr(r[0], "isoformat") else r[0]): r[1]
+        for r in signup_raw
+    }
+    chart_signups = [signup_by_day.get(d, 0) for d in chart_iso]
+
+    login_raw = db.session.query(
+        db.func.date(User.last_login_at),
+        db.func.count(User.id),
+    ).filter(User.last_login_at >= month_ago).group_by(db.func.date(User.last_login_at)).all()
+    login_by_day = {
+        (r[0].isoformat() if hasattr(r[0], "isoformat") else r[0]): r[1]
+        for r in login_raw
+    }
+    chart_logins = [login_by_day.get(d, 0) for d in chart_iso]
+
+    session_raw = db.session.query(
+        PokerSession.session_date,
+        db.func.count(PokerSession.id),
+    ).filter(PokerSession.session_date >= chart_days[0]).group_by(PokerSession.session_date).all()
+    session_by_day = {
+        (r[0].isoformat() if hasattr(r[0], "isoformat") else r[0]): r[1]
+        for r in session_raw
+    }
+    chart_sessions = [session_by_day.get(d, 0) for d in chart_iso]
+
+    chart_data = json.dumps({
+        "labels": chart_labels,
+        "signups": chart_signups,
+        "logins": chart_logins,
+        "sessions": chart_sessions,
+    })
+
+    recent_users = (
+        db.session.query(User)
+        .order_by(User.created_at.desc())
+        .limit(10)
+        .all()
+    )
+    recent_leagues = (
+        db.session.query(League)
+        .order_by(League.created_at.desc())
+        .limit(10)
+        .all()
+    )
+    league_owner_ids = {league.created_by_user_id for league in recent_leagues}
+    owners_by_id = {
+        u.id: u
+        for u in db.session.query(User).filter(User.id.in_(league_owner_ids)).all()
+    } if league_owner_ids else {}
+
+    stats = {
+        "total_users": total_users,
+        "active_users": active_users,
+        "disabled_users": disabled_users,
+        "new_users_7d": new_users_7d,
+        "new_users_30d": new_users_30d,
+        "admin_count": admin_count,
+        "dau": dau,
+        "wau": wau,
+        "mau": mau,
+        "total_leagues": total_leagues,
+        "active_leagues": active_leagues,
+        "public_leagues": public_leagues,
+        "new_leagues_30d": new_leagues_30d,
+        "total_sessions": total_sessions,
+        "open_sessions": open_sessions,
+        "total_events": total_events,
+        "avg_sessions_per_league": avg_sessions_per_league,
+        "avg_buyin_cents": avg_buyin_cents,
+    }
+
+    return render_template(
+        "admin/dashboard.html",
+        stats=stats,
+        recent_users=recent_users,
+        recent_leagues=recent_leagues,
+        owners_by_id=owners_by_id,
+        chart_data=chart_data,
+    )
+
+
+@site_admin_bp.get("/users")
+@site_admin_required
+def users():
+    from ..db_models import League, LeagueMembership, User
+
+    search = request.args.get("q", "").strip()
+    page = max(1, int(request.args.get("page", 1)))
+    per_page = 50
+
+    query = db.session.query(User)
+    if search:
+        query = query.filter(User.email.ilike(f"%{search}%"))
+    query = query.order_by(User.created_at.desc())
+
+    total = query.count()
+    user_list = query.offset((page - 1) * per_page).limit(per_page).all()
+
+    user_ids = [u.id for u in user_list]
+    league_counts = {}
+    if user_ids:
+        rows = (
+            db.session.query(
+                LeagueMembership.user_id,
+                db.func.count(LeagueMembership.id),
+            )
+            .filter(LeagueMembership.user_id.in_(user_ids))
+            .group_by(LeagueMembership.user_id)
+            .all()
+        )
+        league_counts = {row[0]: row[1] for row in rows}
+
+    total_pages = max(1, (total + per_page - 1) // per_page)
+
+    return render_template(
+        "admin/users.html",
+        users=user_list,
+        league_counts=league_counts,
+        search=search,
+        page=page,
+        total=total,
+        total_pages=total_pages,
+    )
+
+
+@site_admin_bp.get("/users/<user_id>")
+@site_admin_required
+def user_detail(user_id: str):
+    from flask import current_app
+
+    from ..db_models import League, LeagueMembership, User
+
+    user = db.session.get(User, user_id)
+    if user is None:
+        flash("User not found.", "error")
+        return redirect(url_for("site_admin.users"))
+
+    memberships = (
+        db.session.query(LeagueMembership, League)
+        .join(League, League.id == LeagueMembership.league_id)
+        .filter(LeagueMembership.user_id == user_id)
+        .order_by(LeagueMembership.created_at.desc())
+        .all()
+    )
+
+    reset_url = None
+    if request.args.get("show_reset") == "1":
+        token = generate_reset_token(user.id)
+        base_url = current_app.config.get("APP_BASE_URL", "").rstrip("/")
+        reset_url = f"{base_url}{url_for('account.reset_password', token=token)}"
+
+    return render_template(
+        "admin/user_detail.html",
+        user=user,
+        memberships=memberships,
+        reset_url=reset_url,
+        viewing_self=user_id == current_user_id(),
+    )
+
+
+@site_admin_bp.post("/users/<user_id>/send-reset")
+@site_admin_required
+def send_reset(user_id: str):
+    from flask import current_app
+
+    from ..db_models import User
+    from ..emails import send_password_reset
+
+    user = db.session.get(User, user_id)
+    if user is None:
+        flash("User not found.", "error")
+        return redirect(url_for("site_admin.users"))
+
+    if user.disabled_at is not None:
+        flash("Cannot send a reset link to a disabled account.", "error")
+        return redirect(url_for("site_admin.user_detail", user_id=user_id))
+
+    token = generate_reset_token(user.id)
+    base_url = current_app.config.get("APP_BASE_URL", "").rstrip("/")
+    reset_url = f"{base_url}{url_for('account.reset_password', token=token)}"
+
+    email_sent = False
+    try:
+        send_password_reset(user.email, reset_url)
+        email_sent = True
+    except Exception:
+        pass
+
+    if email_sent:
+        flash(f"Password reset email sent to {user.email}.", "success")
+    else:
+        flash("Email not sent (mail not configured). Copy the link below.", "error")
+
+    return redirect(url_for("site_admin.user_detail", user_id=user_id, show_reset="1"))
+
+
+@site_admin_bp.post("/users/<user_id>/disable")
+@site_admin_required
+def disable_user(user_id: str):
+    from ..db_models import User
+
+    if user_id == current_user_id():
+        flash("You cannot disable your own account.", "error")
+        return redirect(url_for("site_admin.user_detail", user_id=user_id))
+
+    user = db.session.get(User, user_id)
+    if user is None:
+        flash("User not found.", "error")
+        return redirect(url_for("site_admin.users"))
+
+    if user.disabled_at is None:
+        user.disabled_at = utc_now()
+        db.session.commit()
+        flash(f"{user.email} has been disabled.", "success")
+    else:
+        flash("Account is already disabled.", "error")
+
+    return redirect(url_for("site_admin.user_detail", user_id=user_id))
+
+
+@site_admin_bp.post("/users/<user_id>/enable")
+@site_admin_required
+def enable_user(user_id: str):
+    from ..db_models import User
+
+    user = db.session.get(User, user_id)
+    if user is None:
+        flash("User not found.", "error")
+        return redirect(url_for("site_admin.users"))
+
+    if user.disabled_at is not None:
+        user.disabled_at = None
+        db.session.commit()
+        flash(f"{user.email} has been re-enabled.", "success")
+    else:
+        flash("Account is not disabled.", "error")
+
+    return redirect(url_for("site_admin.user_detail", user_id=user_id))
+
+
+@site_admin_bp.post("/users/<user_id>/grant-admin")
+@site_admin_required
+def grant_admin(user_id: str):
+    from ..db_models import User
+
+    user = db.session.get(User, user_id)
+    if user is None:
+        flash("User not found.", "error")
+        return redirect(url_for("site_admin.users"))
+
+    user.is_site_admin = True
+    db.session.commit()
+    flash(f"{user.email} is now a site admin.", "success")
+    return redirect(url_for("site_admin.user_detail", user_id=user_id))
+
+
+@site_admin_bp.post("/users/<user_id>/revoke-admin")
+@site_admin_required
+def revoke_admin(user_id: str):
+    from ..db_models import User
+
+    if user_id == current_user_id():
+        flash("You cannot revoke your own admin access.", "error")
+        return redirect(url_for("site_admin.user_detail", user_id=user_id))
+
+    user = db.session.get(User, user_id)
+    if user is None:
+        flash("User not found.", "error")
+        return redirect(url_for("site_admin.users"))
+
+    user.is_site_admin = False
+    db.session.commit()
+    flash(f"Admin access removed from {user.email}.", "success")
+    return redirect(url_for("site_admin.user_detail", user_id=user_id))
+
+
+@site_admin_bp.post("/users/<user_id>/reset-password")
+@site_admin_required
+def admin_reset_password(user_id: str):
+    from ..db_models import User
+
+    user = db.session.get(User, user_id)
+    if user is None:
+        flash("User not found.", "error")
+        return redirect(url_for("site_admin.users"))
+
+    new_password = request.form.get("new_password", "")
+    if len(new_password) < 8:
+        flash("Password must be at least 8 characters.", "error")
+        return redirect(url_for("site_admin.user_detail", user_id=user_id))
+
+    user.password_hash = hash_password(new_password)
+    db.session.commit()
+    flash(f"Password updated for {user.email}.", "success")
+    return redirect(url_for("site_admin.user_detail", user_id=user_id))
+
+
+@site_admin_bp.get("/leagues")
+@site_admin_required
+def leagues():
+    from ..db_models import League, LeagueMembership, PokerSession, User
+
+    search = request.args.get("q", "").strip()
+    visibility = request.args.get("visibility", "").strip()
+    show_archived = request.args.get("archived", "0") == "1"
+    page = max(1, int(request.args.get("page", 1)))
+    per_page = 50
+
+    query = (
+        db.session.query(League)
+        .outerjoin(User, User.id == League.created_by_user_id)
+    )
+    if search:
+        query = query.filter(
+            db.or_(
+                League.name.ilike(f"%{search}%"),
+                User.email.ilike(f"%{search}%"),
+            )
+        )
+    if visibility in ("public", "private"):
+        query = query.filter(League.visibility == visibility)
+    if not show_archived:
+        query = query.filter(League.archived_at.is_(None))
+    query = query.order_by(League.created_at.desc())
+
+    total = query.count()
+    league_list = query.offset((page - 1) * per_page).limit(per_page).all()
+
+    league_ids = [lg.id for lg in league_list]
+    owner_ids = [lg.created_by_user_id for lg in league_list]
+
+    owners_by_id = {}
+    if owner_ids:
+        owners_by_id = {
+            u.id: u
+            for u in db.session.query(User).filter(User.id.in_(owner_ids)).all()
+        }
+
+    member_counts = {}
+    session_counts = {}
+    if league_ids:
+        for row in (
+            db.session.query(LeagueMembership.league_id, db.func.count(LeagueMembership.id))
+            .filter(LeagueMembership.league_id.in_(league_ids))
+            .group_by(LeagueMembership.league_id)
+            .all()
+        ):
+            member_counts[row[0]] = row[1]
+
+        for row in (
+            db.session.query(PokerSession.league_id, db.func.count(PokerSession.id))
+            .filter(PokerSession.league_id.in_(league_ids))
+            .group_by(PokerSession.league_id)
+            .all()
+        ):
+            session_counts[row[0]] = row[1]
+
+    total_pages = max(1, (total + per_page - 1) // per_page)
+
+    return render_template(
+        "admin/leagues.html",
+        leagues=league_list,
+        owners_by_id=owners_by_id,
+        member_counts=member_counts,
+        session_counts=session_counts,
+        search=search,
+        visibility=visibility,
+        show_archived=show_archived,
+        page=page,
+        total=total,
+        total_pages=total_pages,
+    )
+
+
+@site_admin_bp.get("/leagues/<league_id>")
+@site_admin_required
+def league_detail(league_id: str):
+    from ..db_models import League, LedgerEvent, LeagueMembership, Player, PokerSession, User
+
+    league = db.session.get(League, league_id)
+    if league is None:
+        flash("League not found.", "error")
+        return redirect(url_for("site_admin.leagues"))
+
+    memberships = (
+        db.session.query(LeagueMembership, User)
+        .join(User, User.id == LeagueMembership.user_id)
+        .filter(LeagueMembership.league_id == league_id)
+        .order_by(LeagueMembership.created_at.asc())
+        .all()
+    )
+
+    owner = db.session.get(User, league.created_by_user_id)
+
+    session_count = db.session.query(db.func.count(PokerSession.id)).filter(
+        PokerSession.league_id == league_id
+    ).scalar() or 0
+
+    open_sessions = db.session.query(db.func.count(PokerSession.id)).filter(
+        PokerSession.league_id == league_id,
+        PokerSession.status == "open",
+    ).scalar() or 0
+
+    event_count = db.session.query(db.func.count(LedgerEvent.id)).filter(
+        LedgerEvent.league_id == league_id,
+        LedgerEvent.voided_at.is_(None),
+    ).scalar() or 0
+
+    player_count = db.session.query(db.func.count(Player.id)).filter(
+        Player.league_id == league_id
+    ).scalar() or 0
+
+    return render_template(
+        "admin/league_detail.html",
+        league=league,
+        memberships=memberships,
+        owner=owner,
+        session_count=session_count,
+        open_sessions=open_sessions,
+        event_count=event_count,
+        player_count=player_count,
+    )
+
+
+@site_admin_bp.post("/leagues/<league_id>/invite")
+@site_admin_required
+def admin_invite_member(league_id: str):
+    from flask import current_app
+
+    from ..auth import generate_invite_token
+    from ..db_models import League
+    from ..emails import send_league_invite
+    from ..repositories.leagues import find_membership, find_user_by_email
+
+    league = db.session.get(League, league_id)
+    if league is None:
+        flash("League not found.", "error")
+        return redirect(url_for("site_admin.leagues"))
+
+    email = normalize_email(request.form.get("email", ""))
+    role = request.form.get("role", "manager").strip()
+
+    if not email or "@" not in email:
+        flash("Enter a valid email address.", "error")
+        return redirect(url_for("site_admin.league_detail", league_id=league_id))
+
+    if role not in ("manager", "viewer"):
+        flash("Invalid role.", "error")
+        return redirect(url_for("site_admin.league_detail", league_id=league_id))
+
+    existing_user = find_user_by_email(email)
+    if existing_user:
+        existing_membership = find_membership(league.id, existing_user.id)
+        if existing_membership:
+            flash(f"{email} is already a member of this league.", "error")
+            return redirect(url_for("site_admin.league_detail", league_id=league_id))
+
+    token = generate_invite_token(league.id, email, role, current_user_id() or "")
+    base_url = current_app.config.get("APP_BASE_URL", "").rstrip("/")
+    invite_url = f"{base_url}{url_for('account.accept_invite', token=token)}"
+
+    try:
+        send_league_invite(email, league.name, invite_url, current_user_id() or "")
+        flash(f"Invitation sent to {email}.", "success")
+    except Exception:
+        flash(f"Email not configured. Invite link (copy manually): {invite_url}", "info")
+
+    return redirect(url_for("site_admin.league_detail", league_id=league_id))
+
+
+@site_admin_bp.post("/leagues/<league_id>/members/<user_id>/remove")
+@site_admin_required
+def admin_remove_member(league_id: str, user_id: str):
+    from ..db_models import League, LeagueMembership
+    from ..repositories.leagues import remove_league_member
+
+    league = db.session.get(League, league_id)
+    if league is None:
+        flash("League not found.", "error")
+        return redirect(url_for("site_admin.leagues"))
+
+    membership = LeagueMembership.query.filter_by(
+        league_id=league_id,
+        user_id=user_id,
+        disabled_at=None,
+    ).one_or_none()
+
+    if membership is None:
+        flash("Member not found.", "error")
+        return redirect(url_for("site_admin.league_detail", league_id=league_id))
+
+    if membership.role == "owner":
+        flash("Cannot remove the league owner. Transfer ownership first.", "error")
+        return redirect(url_for("site_admin.league_detail", league_id=league_id))
+
+    remove_league_member(league_id, user_id)
+    db.session.commit()
+    flash("Member removed.", "success")
+    return redirect(url_for("site_admin.league_detail", league_id=league_id))
+
+
+@site_admin_bp.post("/leagues/<league_id>/transfer")
+@site_admin_required
+def admin_transfer_ownership(league_id: str):
+    from ..db_models import League
+    from ..repositories.leagues import transfer_league_ownership
+
+    league = db.session.get(League, league_id)
+    if league is None:
+        flash("League not found.", "error")
+        return redirect(url_for("site_admin.leagues"))
+
+    new_owner_id = request.form.get("new_owner_user_id", "").strip()
+    if not new_owner_id:
+        flash("Select a member to transfer ownership to.", "error")
+        return redirect(url_for("site_admin.league_detail", league_id=league_id))
+
+    try:
+        transfer_league_ownership(league_id, new_owner_id)
+        db.session.commit()
+        flash("Ownership transferred.", "success")
+    except ValueError as exc:
+        flash(str(exc), "error")
+
+    return redirect(url_for("site_admin.league_detail", league_id=league_id))
diff --git a/boker/static/css/admin.css b/boker/static/css/admin.css
new file mode 100644
index 0000000..2b40188
--- /dev/null
+++ b/boker/static/css/admin.css
@@ -0,0 +1,562 @@
+/* ================================================================
+   ADMIN SHELL — left sidebar layout
+   ================================================================ */
+.admin-html, .admin-body {
+  margin: 0;
+  height: 100%;
+}
+.admin-body {
+  display: flex;
+  min-height: 100vh;
+  background: var(--bg);
+  color: var(--text-body);
+  font-family: var(--font-ui);
+  font-size: 14px;
+  line-height: 1.5;
+  -webkit-font-smoothing: antialiased;
+}
+
+/* ---- sidebar ---- */
+.adm-sidebar {
+  width: 220px;
+  flex-shrink: 0;
+  display: flex;
+  flex-direction: column;
+  background: var(--surface);
+  border-right: 1px solid var(--border);
+  position: fixed;
+  top: 0; left: 0; bottom: 0;
+  z-index: 100;
+  overflow-y: auto;
+}
+.adm-sidebar__logo {
+  padding: 20px 16px 16px;
+  border-bottom: 1px solid var(--border);
+  display: flex;
+  flex-direction: column;
+  gap: 2px;
+}
+.adm-sidebar__wordmark {
+  font-size: 13px;
+  font-weight: 700;
+  color: var(--text-strong);
+  letter-spacing: -.01em;
+}
+.adm-sidebar__tag {
+  font-size: 10px;
+  font-weight: 600;
+  letter-spacing: .06em;
+  text-transform: uppercase;
+  color: var(--accent);
+  background: var(--accent-chip);
+  border: 1px solid var(--accent-chip-bd);
+  border-radius: 4px;
+  padding: 1px 5px;
+  display: inline-block;
+  width: fit-content;
+}
+.adm-nav {
+  flex: 1;
+  padding: 12px 8px;
+  display: flex;
+  flex-direction: column;
+  gap: 2px;
+}
+.adm-nav__section {
+  font-size: 10px;
+  font-weight: 600;
+  letter-spacing: .07em;
+  text-transform: uppercase;
+  color: var(--faintest);
+  padding: 12px 8px 4px;
+}
+.adm-nav__link {
+  display: flex;
+  align-items: center;
+  gap: 8px;
+  padding: 7px 10px;
+  border-radius: var(--r-pill);
+  color: var(--text-2);
+  text-decoration: none;
+  font-size: 13px;
+  font-weight: 500;
+  transition: background .12s, color .12s;
+}
+.adm-nav__link:hover {
+  background: var(--surface-raised);
+  color: var(--text);
+}
+.adm-nav__link.is-active {
+  background: var(--accent-chip);
+  color: var(--accent);
+  font-weight: 600;
+}
+.adm-nav__icon {
+  width: 16px;
+  height: 16px;
+  flex-shrink: 0;
+  opacity: .7;
+}
+.adm-nav__link.is-active .adm-nav__icon { opacity: 1; }
+/* ---- main content ---- */
+.adm-main {
+  margin-left: 220px;
+  flex: 1;
+  min-width: 0;
+  display: flex;
+  flex-direction: column;
+}
+
+/* ---- header ---- */
+.adm-header {
+  height: 60px;
+  border-bottom: 1px solid var(--border);
+  display: flex;
+  align-items: center;
+  justify-content: space-between;
+  padding: 0 28px;
+  gap: 16px;
+  background: var(--surface);
+  position: sticky;
+  top: 0;
+  z-index: 50;
+}
+.adm-header__left {
+  display: flex;
+  align-items: center;
+  min-width: 0;
+}
+.adm-header__title {
+  font-size: 16px;
+  font-weight: 700;
+  color: var(--text-strong);
+  letter-spacing: -.01em;
+  margin: 0;
+  white-space: nowrap;
+  overflow: hidden;
+  text-overflow: ellipsis;
+}
+.adm-header__breadcrumb {
+  display: flex;
+  align-items: center;
+  gap: 8px;
+  font-size: 13px;
+  min-width: 0;
+}
+.adm-header__breadcrumb a {
+  color: var(--faintest);
+  text-decoration: none;
+  font-weight: 500;
+  transition: color .12s;
+  white-space: nowrap;
+}
+.adm-header__breadcrumb a:hover { color: var(--accent); }
+.adm-header__sep { color: var(--border-strong); flex-shrink: 0; }
+.adm-header__title.adm-header__breadcrumb-end {
+  font-size: 14px;
+  font-weight: 600;
+  color: var(--text-strong);
+  white-space: nowrap;
+  overflow: hidden;
+  text-overflow: ellipsis;
+}
+/* breadcrumb leaf node */
+.adm-header__breadcrumb .adm-header__title {
+  font-size: 14px;
+  font-weight: 600;
+  color: var(--text-strong);
+  white-space: nowrap;
+  overflow: hidden;
+  text-overflow: ellipsis;
+  margin: 0;
+}
+.adm-header__right {
+  display: flex;
+  align-items: center;
+  gap: 14px;
+  flex-shrink: 0;
+}
+.adm-header__user {
+  display: flex;
+  align-items: center;
+  gap: 5px;
+  font-size: 12px;
+  color: var(--faintest);
+  font-family: var(--font-mono);
+  max-width: 200px;
+  overflow: hidden;
+  text-overflow: ellipsis;
+  white-space: nowrap;
+}
+.adm-header__back {
+  display: inline-flex;
+  align-items: center;
+  gap: 5px;
+  font-size: 12px;
+  font-weight: 500;
+  color: var(--text-2);
+  text-decoration: none;
+  border: 1px solid var(--border-strong);
+  border-radius: var(--r-pill);
+  padding: 4px 10px;
+  transition: border-color .12s, color .12s, background .12s;
+  white-space: nowrap;
+}
+.adm-header__back:hover {
+  color: var(--text-strong);
+  border-color: var(--border-hi);
+  background: var(--surface-raised);
+}
+.adm-content {
+  padding: 28px;
+  max-width: 1200px;
+}
+
+/* ---- flash messages ---- */
+.adm-flash-stack {
+  padding: 0 28px 0;
+  display: flex;
+  flex-direction: column;
+  gap: 8px;
+  margin-top: 16px;
+}
+.adm-flash {
+  padding: 10px 14px;
+  border-radius: var(--r-sm);
+  font-size: 13px;
+}
+.adm-flash.success { background: var(--pos-tint); color: var(--pos); border: 1px solid var(--pos-tint-bd); }
+.adm-flash.error   { background: var(--neg-tint); color: var(--neg); border: 1px solid var(--neg-tint-bd); }
+.adm-flash.info    { background: var(--accent-tint); color: var(--accent); border: 1px solid var(--accent-chip-bd); }
+
+/* ---- stat sections ---- */
+.adm-stat-section {
+  margin-bottom: 24px;
+}
+.adm-stat-section__label {
+  font-size: 10px;
+  font-weight: 700;
+  letter-spacing: .08em;
+  text-transform: uppercase;
+  color: var(--faintest);
+  margin-bottom: 10px;
+  padding-left: 2px;
+}
+.adm-stat-section__grid {
+  display: grid;
+  grid-template-columns: repeat(auto-fill, minmax(170px, 1fr));
+  gap: 10px;
+}
+
+/* ---- stat grid (legacy, still used on other pages) ---- */
+.adm-stat-grid {
+  display: grid;
+  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
+  gap: 12px;
+  margin-bottom: 28px;
+}
+.adm-stat {
+  background: var(--surface);
+  border: 1px solid var(--border);
+  border-radius: var(--r-md);
+  padding: 16px 18px;
+}
+.adm-stat--accent {
+  border-left: 3px solid var(--accent);
+  padding-left: 15px;
+  background: var(--accent-tint);
+}
+.adm-stat--pos {
+  border-left: 3px solid var(--pos);
+  padding-left: 15px;
+  background: var(--pos-tint);
+}
+.adm-stat--warn {
+  border-left: 3px solid var(--warn);
+  padding-left: 15px;
+  background: var(--warn-tint);
+}
+.adm-stat__label {
+  font-size: 11px;
+  font-weight: 600;
+  letter-spacing: .05em;
+  text-transform: uppercase;
+  color: var(--faintest);
+  margin-bottom: 6px;
+}
+.adm-stat__val {
+  font-size: 28px;
+  font-weight: 700;
+  color: var(--text-strong);
+  line-height: 1;
+}
+.adm-stat__sub {
+  font-size: 11px;
+  color: var(--faintest);
+  margin-top: 4px;
+}
+.adm-stat__sub b { color: var(--text-2); }
+
+/* ---- section heading ---- */
+.adm-section {
+  margin-bottom: 28px;
+}
+.adm-section__head {
+  display: flex;
+  align-items: center;
+  justify-content: space-between;
+  margin-bottom: 12px;
+  gap: 12px;
+}
+.adm-section__title {
+  font-size: 13px;
+  font-weight: 600;
+  color: var(--text-strong);
+}
+
+/* ---- table ---- */
+.adm-table-wrap {
+  overflow-x: auto;
+  border: 1px solid var(--border);
+  border-radius: var(--r-md);
+  background: var(--surface);
+}
+.adm-table {
+  width: 100%;
+  border-collapse: collapse;
+  font-size: 13px;
+}
+.adm-table th {
+  padding: 9px 14px;
+  text-align: left;
+  font-size: 11px;
+  font-weight: 600;
+  letter-spacing: .04em;
+  text-transform: uppercase;
+  color: var(--faintest);
+  border-bottom: 1px solid var(--border);
+  white-space: nowrap;
+  background: var(--surface-head);
+}
+.adm-table td {
+  padding: 10px 14px;
+  border-bottom: 1px solid var(--divider);
+  color: var(--text-2);
+  vertical-align: middle;
+}
+.adm-table tr:last-child td { border-bottom: none; }
+.adm-table tr:hover td { background: var(--surface-raised); }
+.adm-table a { color: var(--accent); text-decoration: none; }
+.adm-table a:hover { text-decoration: underline; }
+.adm-table .adm-mono { font-family: var(--font-mono); font-size: 12px; }
+.adm-table .cell-muted { color: var(--faintest); }
+
+/* ---- pill badges ---- */
+.adm-pill {
+  display: inline-block;
+  font-size: 10px;
+  font-weight: 600;
+  letter-spacing: .04em;
+  text-transform: uppercase;
+  padding: 2px 7px;
+  border-radius: 99px;
+  white-space: nowrap;
+}
+.adm-pill--active  { background: var(--pos-tint);     color: var(--pos);    border: 1px solid var(--pos-tint-bd); }
+.adm-pill--disabled{ background: var(--neg-tint);     color: var(--neg);    border: 1px solid var(--neg-tint-bd); }
+.adm-pill--admin   { background: var(--accent-chip);  color: var(--accent); border: 1px solid var(--accent-chip-bd); }
+.adm-pill--open    { background: var(--warn-tint);    color: var(--warn);   border: 1px solid var(--warn-tint-bd); }
+.adm-pill--public  { background: var(--pos-tint);     color: var(--pos);    border: 1px solid var(--pos-tint-bd); }
+.adm-pill--private { background: var(--surface-raised); color: var(--faintest); border: 1px solid var(--border); }
+.adm-pill--owner   { background: var(--accent-chip);  color: var(--accent); border: 1px solid var(--accent-chip-bd); }
+.adm-pill--manager { background: var(--warn-tint);    color: var(--warn);   border: 1px solid var(--warn-tint-bd); }
+.adm-pill--viewer  { background: var(--surface-raised); color: var(--faintest); border: 1px solid var(--border); }
+.adm-pill--archived{ background: var(--surface-raised); color: var(--faintest-2); border: 1px solid var(--border); }
+
+/* ---- search bar ---- */
+.adm-search {
+  display: flex;
+  gap: 8px;
+  margin-bottom: 16px;
+}
+.adm-search input {
+  flex: 1;
+  min-width: 0;
+  padding: 8px 12px;
+  background: var(--field);
+  border: 1px solid var(--border-strong);
+  border-radius: var(--r-sm);
+  color: var(--text);
+  font-size: 13px;
+  font-family: inherit;
+}
+.adm-search input:focus {
+  outline: none;
+  border-color: var(--accent);
+}
+
+/* ---- buttons ---- */
+.adm-btn {
+  display: inline-flex;
+  align-items: center;
+  gap: 6px;
+  padding: 7px 14px;
+  border-radius: var(--r-sm);
+  font-size: 12px;
+  font-weight: 600;
+  font-family: inherit;
+  cursor: pointer;
+  border: 1px solid transparent;
+  text-decoration: none;
+  transition: opacity .12s, background .12s;
+  white-space: nowrap;
+}
+.adm-btn:hover { opacity: .85; }
+.adm-btn--primary { background: var(--accent); color: var(--accent-ink); }
+.adm-btn--ghost   { background: transparent; color: var(--text-2); border-color: var(--border-strong); }
+.adm-btn--ghost:hover { background: var(--surface-raised); opacity: 1; }
+.adm-btn--danger  { background: var(--neg-tint); color: var(--neg); border-color: var(--neg-tint-bd); }
+.adm-btn--warn    { background: var(--warn-tint); color: var(--warn); border-color: var(--warn-tint-bd); }
+.adm-btn--sm { padding: 4px 10px; font-size: 11px; }
+
+/* ---- card ---- */
+.adm-card {
+  background: var(--surface);
+  border: 1px solid var(--border);
+  border-radius: var(--r-md);
+  padding: 20px;
+  margin-bottom: 20px;
+}
+.adm-card__title {
+  font-size: 13px;
+  font-weight: 600;
+  color: var(--text-strong);
+  margin-bottom: 14px;
+  padding-bottom: 10px;
+  border-bottom: 1px solid var(--border);
+}
+.adm-kv { display: grid; gap: 8px; }
+.adm-kv-row {
+  display: grid;
+  grid-template-columns: 140px 1fr;
+  gap: 12px;
+  font-size: 13px;
+}
+.adm-kv-row dt { color: var(--faintest); font-size: 12px; }
+.adm-kv-row dd { margin: 0; color: var(--text-2); word-break: break-all; }
+.adm-kv-row dd b { color: var(--text-strong); font-weight: 600; }
+
+/* ---- action group ---- */
+.adm-actions {
+  display: flex;
+  flex-wrap: wrap;
+  gap: 8px;
+  align-items: center;
+}
+
+/* ---- reset link box ---- */
+.adm-reset-box {
+  margin-top: 12px;
+  padding: 12px 14px;
+  background: var(--warn-tint);
+  border: 1px solid var(--warn-tint-bd);
+  border-radius: var(--r-sm);
+}
+.adm-reset-box__label {
+  font-size: 11px;
+  font-weight: 600;
+  color: var(--warn);
+  letter-spacing: .04em;
+  text-transform: uppercase;
+  margin-bottom: 6px;
+}
+.adm-reset-box__url {
+  font-family: var(--font-mono);
+  font-size: 11px;
+  color: var(--text-2);
+  word-break: break-all;
+  user-select: all;
+}
+
+/* ---- pagination ---- */
+.adm-pagination {
+  display: flex;
+  align-items: center;
+  gap: 6px;
+  margin-top: 16px;
+  font-size: 12px;
+  color: var(--faintest);
+}
+.adm-pagination a {
+  padding: 4px 10px;
+  border: 1px solid var(--border-strong);
+  border-radius: var(--r-pill);
+  color: var(--text-2);
+  text-decoration: none;
+}
+.adm-pagination a:hover { background: var(--surface-raised); }
+.adm-pagination span { padding: 4px 10px; color: var(--faintest); }
+
+/* ---- inline form ---- */
+.adm-inline-form { display: inline; }
+.adm-pass-form {
+  display: flex;
+  gap: 8px;
+  align-items: flex-end;
+  margin-top: 8px;
+}
+.adm-pass-form input {
+  padding: 6px 10px;
+  background: var(--field);
+  border: 1px solid var(--border-strong);
+  border-radius: var(--r-sm);
+  color: var(--text);
+  font-size: 12px;
+  font-family: inherit;
+  min-width: 220px;
+}
+.adm-pass-form input:focus { outline: none; border-color: var(--accent); }
+
+/* ---- chart layout ---- */
+.adm-chart-row {
+  display: grid;
+  grid-template-columns: 1fr 1fr;
+  gap: 16px;
+  margin-bottom: 28px;
+}
+@media (max-width: 768px) {
+  .adm-chart-row { grid-template-columns: 1fr; }
+}
+.adm-chart-card {
+  background: var(--surface);
+  border: 1px solid var(--border);
+  border-radius: var(--r-md);
+  padding: 16px 18px 14px;
+}
+.adm-chart-card__head {
+  display: flex;
+  align-items: flex-start;
+  justify-content: space-between;
+  gap: 12px;
+  margin-bottom: 14px;
+}
+.adm-chart-card__title {
+  font-size: 12px;
+  font-weight: 700;
+  color: var(--text-strong);
+  text-transform: uppercase;
+  letter-spacing: .05em;
+  line-height: 1.2;
+}
+.adm-chart-card__sub {
+  font-size: 11px;
+  color: var(--faintest);
+  margin-top: 3px;
+}
+.adm-chart-card__meta {
+  font-size: 11px;
+  color: var(--faintest);
+  white-space: nowrap;
+  margin-top: 2px;
+}
+.adm-chart-card__meta b { color: var(--text-2); }
diff --git a/boker/static/css/style.css b/boker/static/css/style.css
index 6d36ff5..bc6975b 100644
--- a/boker/static/css/style.css
+++ b/boker/static/css/style.css
@@ -597,6 +597,13 @@ h3 {
   outline: none;
   appearance: none;
 }
+.form-card select {
+  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='11' height='7' viewBox='0 0 11 7'%3E%3Cpath d='M1 1l4.5 4.5L10 1' stroke='%2366646f' stroke-width='1.5' fill='none' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
+  background-repeat: no-repeat;
+  background-position: right 12px center;
+  padding-right: 34px;
+  cursor: pointer;
+}
 .form-card input:focus, .form-card select:focus, .form-card textarea:focus {
   border-color: var(--accent-chip-bd);
   box-shadow: 0 0 0 3px var(--accent-a22);
diff --git a/boker/static/css/tokens.css b/boker/static/css/tokens.css
index 00e4681..f434282 100644
--- a/boker/static/css/tokens.css
+++ b/boker/static/css/tokens.css
@@ -78,6 +78,12 @@
   --w-admin:1580px;
   --gutter: clamp(16px, 4vw, 40px);
 
+  /* ---- typography ---- */
+  --font-ui:      Aptos, Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
+  --font-display: var(--font-ui);
+  --font-mono:    ui-monospace, "SFMono-Regular", "Cascadia Mono", "Roboto Mono", "Liberation Mono", monospace;
+  --font-money:   var(--font-ui);
+
   /* ---- Chart.js backward compat (read as raw strings by JS) ---- */
   --text-muted: #bcbac6;
   --line: #26262f;
diff --git a/boker/templates/admin/base.html b/boker/templates/admin/base.html
new file mode 100644
index 0000000..1c0cd90
--- /dev/null
+++ b/boker/templates/admin/base.html
@@ -0,0 +1,95 @@
+<!doctype html>
+<html lang="en" class="admin-html">
+<head>
+    <meta charset="utf-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1">
+    <title>{% block title %}Admin{% endblock %} · boker admin</title>
+    <link rel="icon" href="{{ url_for('static', filename='favicon.svg') }}" type="image/svg+xml">
+    <link rel="stylesheet" href="{{ url_for('static', filename='css/tokens.css') }}">
+    <link rel="stylesheet" href="{{ url_for('static', filename='css/admin.css') }}">
+    <meta name="robots" content="noindex,nofollow">
+</head>
+<body class="admin-body">
+
+<aside class="adm-sidebar">
+    <div class="adm-sidebar__logo">
+        <span class="adm-sidebar__wordmark">myboker.org</span>
+        <span class="adm-sidebar__tag">Admin</span>
+    </div>
+
+    <nav class="adm-nav">
+        <span class="adm-nav__section">Overview</span>
+        <a class="adm-nav__link {{ 'is-active' if request.endpoint == 'site_admin.dashboard' }}"
+           href="{{ url_for('site_admin.dashboard') }}">
+            <svg class="adm-nav__icon" viewBox="0 0 16 16" fill="none" stroke="currentColor" stroke-width="1.5">
+                <rect x="1" y="1" width="6" height="6" rx="1.5"/>
+                <rect x="9" y="1" width="6" height="6" rx="1.5"/>
+                <rect x="1" y="9" width="6" height="6" rx="1.5"/>
+                <rect x="9" y="9" width="6" height="6" rx="1.5"/>
+            </svg>
+            Dashboard
+        </a>
+
+        <span class="adm-nav__section">Manage</span>
+        <a class="adm-nav__link {{ 'is-active' if request.endpoint and request.endpoint.startswith('site_admin.user') }}"
+           href="{{ url_for('site_admin.users') }}">
+            <svg class="adm-nav__icon" viewBox="0 0 16 16" fill="none" stroke="currentColor" stroke-width="1.5">
+                <circle cx="8" cy="5" r="3"/>
+                <path d="M2 14c0-3.314 2.686-5 6-5s6 1.686 6 5" stroke-linecap="round"/>
+            </svg>
+            Users
+        </a>
+        <a class="adm-nav__link {{ 'is-active' if request.endpoint and request.endpoint.startswith('site_admin.league') }}"
+           href="{{ url_for('site_admin.leagues') }}">
+            <svg class="adm-nav__icon" viewBox="0 0 16 16" fill="none" stroke="currentColor" stroke-width="1.5">
+                <circle cx="8" cy="8" r="6.5"/>
+                <path d="M5 8h6M8 5v6"/>
+            </svg>
+            Leagues
+        </a>
+    </nav>
+</aside>
+
+<div class="adm-main">
+    <header class="adm-header">
+        <div class="adm-header__left">
+            {% block breadcrumb %}
+            <h1 class="adm-header__title">{% block page_title %}{% endblock %}</h1>
+            {% endblock %}
+        </div>
+        <div class="adm-header__right">
+            <span class="adm-header__user">
+                <svg width="13" height="13" viewBox="0 0 16 16" fill="none" stroke="currentColor" stroke-width="1.5" style="opacity:.5">
+                    <circle cx="8" cy="5" r="3"/>
+                    <path d="M2 14c0-3.314 2.686-5 6-5s6 1.686 6 5" stroke-linecap="round"/>
+                </svg>
+                {{ current_user_id }}
+            </span>
+            <a class="adm-header__back" href="{{ url_for('public.home') }}">
+                <svg width="13" height="13" viewBox="0 0 16 16" fill="none" stroke="currentColor" stroke-width="1.5">
+                    <path d="M10 3L5 8l5 5" stroke-linecap="round" stroke-linejoin="round"/>
+                </svg>
+                Back to site
+            </a>
+        </div>
+    </header>
+
+    {% with messages = get_flashed_messages(with_categories=true) %}
+        {% if messages %}
+            <div class="adm-flash-stack">
+                {% for category, message in messages %}
+                    <div class="adm-flash {{ category }}">{{ message }}</div>
+                {% endfor %}
+            </div>
+        {% endif %}
+    {% endwith %}
+
+    <div class="adm-content">
+        {% block content %}{% endblock %}
+    </div>
+</div>
+
+<script src="https://cdn.jsdelivr.net/npm/chart.js"></script>
+{% block extra_scripts %}{% endblock %}
+</body>
+</html>
diff --git a/boker/templates/admin/dashboard.html b/boker/templates/admin/dashboard.html
new file mode 100644
index 0000000..1cb2d71
--- /dev/null
+++ b/boker/templates/admin/dashboard.html
@@ -0,0 +1,269 @@
+{% extends "admin/base.html" %}
+{% block title %}Dashboard{% endblock %}
+{% block page_title %}Dashboard{% endblock %}
+
+{% block content %}
+
+<div class="adm-stat-section">
+    <div class="adm-stat-section__label">Users</div>
+    <div class="adm-stat-section__grid">
+        <div class="adm-stat">
+            <div class="adm-stat__label">Total users</div>
+            <div class="adm-stat__val">{{ stats.total_users }}</div>
+            <div class="adm-stat__sub"><b>{{ stats.new_users_7d }}</b> new this week · <b>{{ stats.new_users_30d }}</b> this month</div>
+        </div>
+        <div class="adm-stat">
+            <div class="adm-stat__label">Active accounts</div>
+            <div class="adm-stat__val">{{ stats.active_users }}</div>
+            <div class="adm-stat__sub"><b>{{ stats.disabled_users }}</b> disabled · <b>{{ stats.admin_count }}</b> admin{% if stats.admin_count != 1 %}s{% endif %}</div>
+        </div>
+        <div class="adm-stat adm-stat--accent">
+            <div class="adm-stat__label">Daily active</div>
+            <div class="adm-stat__val">{{ stats.dau }}</div>
+            <div class="adm-stat__sub">logged in today</div>
+        </div>
+        <div class="adm-stat adm-stat--accent">
+            <div class="adm-stat__label">Weekly active</div>
+            <div class="adm-stat__val">{{ stats.wau }}</div>
+            <div class="adm-stat__sub">past 7 days</div>
+        </div>
+        <div class="adm-stat adm-stat--accent">
+            <div class="adm-stat__label">Monthly active</div>
+            <div class="adm-stat__val">{{ stats.mau }}</div>
+            <div class="adm-stat__sub">past 30 days</div>
+        </div>
+    </div>
+</div>
+
+<div class="adm-stat-section">
+    <div class="adm-stat-section__label">Leagues</div>
+    <div class="adm-stat-section__grid">
+        <div class="adm-stat adm-stat--pos">
+            <div class="adm-stat__label">Active leagues</div>
+            <div class="adm-stat__val">{{ stats.active_leagues }}</div>
+            <div class="adm-stat__sub"><b>{{ stats.public_leagues }}</b> public · <b>{{ stats.new_leagues_30d }}</b> new this month</div>
+        </div>
+        <div class="adm-stat adm-stat--pos">
+            <div class="adm-stat__label">Avg sessions / league</div>
+            <div class="adm-stat__val">{{ stats.avg_sessions_per_league }}</div>
+            <div class="adm-stat__sub">across all leagues</div>
+        </div>
+        <div class="adm-stat adm-stat--pos">
+            <div class="adm-stat__label">Avg buyin / league</div>
+            <div class="adm-stat__val">{{ stats.avg_buyin_cents | money }}</div>
+            <div class="adm-stat__sub">total buyins per league</div>
+        </div>
+    </div>
+</div>
+
+<div class="adm-stat-section">
+    <div class="adm-stat-section__label">Activity</div>
+    <div class="adm-stat-section__grid">
+        <div class="adm-stat adm-stat--warn">
+            <div class="adm-stat__label">Sessions</div>
+            <div class="adm-stat__val">{{ stats.total_sessions }}</div>
+            <div class="adm-stat__sub"><b>{{ stats.open_sessions }}</b> currently open</div>
+        </div>
+        <div class="adm-stat adm-stat--warn">
+            <div class="adm-stat__label">Ledger events</div>
+            <div class="adm-stat__val">{{ stats.total_events }}</div>
+            <div class="adm-stat__sub">across all leagues</div>
+        </div>
+    </div>
+</div>
+
+<div class="adm-chart-row">
+    <div class="adm-chart-card">
+        <div class="adm-chart-card__head">
+            <div>
+                <div class="adm-chart-card__title">User activity</div>
+                <div class="adm-chart-card__sub">Logins &amp; new signups — last 30 days</div>
+            </div>
+            <span class="adm-chart-card__meta">DAU <b>{{ stats.dau }}</b> · MAU <b>{{ stats.mau }}</b></span>
+        </div>
+        <canvas id="userActivityChart" height="110"></canvas>
+    </div>
+    <div class="adm-chart-card">
+        <div class="adm-chart-card__head">
+            <div>
+                <div class="adm-chart-card__title">Session frequency</div>
+                <div class="adm-chart-card__sub">Sessions played per day — last 30 days</div>
+            </div>
+            <span class="adm-chart-card__meta">Total <b>{{ stats.total_sessions }}</b></span>
+        </div>
+        <canvas id="sessionActivityChart" height="110"></canvas>
+    </div>
+</div>
+
+<div class="adm-section">
+    <div class="adm-section__head">
+        <span class="adm-section__title">Recent sign-ups</span>
+        <a class="adm-btn adm-btn--ghost adm-btn--sm" href="{{ url_for('site_admin.users') }}">View all users</a>
+    </div>
+    {% if recent_users %}
+    <div class="adm-table-wrap">
+        <table class="adm-table">
+            <thead>
+                <tr>
+                    <th>Email</th>
+                    <th>Joined</th>
+                    <th>Status</th>
+                </tr>
+            </thead>
+            <tbody>
+                {% for user in recent_users %}
+                <tr>
+                    <td><a href="{{ url_for('site_admin.user_detail', user_id=user.id) }}">{{ user.email }}</a>{% if user.is_site_admin %} <span class="adm-pill adm-pill--admin">admin</span>{% endif %}</td>
+                    <td class="cell-muted">{{ user.created_at.strftime('%b %d, %Y') }}</td>
+                    <td>
+                        {% if user.disabled_at %}
+                            <span class="adm-pill adm-pill--disabled">Disabled</span>
+                        {% else %}
+                            <span class="adm-pill adm-pill--active">Active</span>
+                        {% endif %}
+                    </td>
+                </tr>
+                {% endfor %}
+            </tbody>
+        </table>
+    </div>
+    {% else %}
+    <p style="color:var(--faintest);font-size:13px;">No users yet.</p>
+    {% endif %}
+</div>
+
+<div class="adm-section">
+    <div class="adm-section__head">
+        <span class="adm-section__title">Recently created leagues</span>
+        <a class="adm-btn adm-btn--ghost adm-btn--sm" href="{{ url_for('site_admin.leagues') }}">View all leagues</a>
+    </div>
+    {% if recent_leagues %}
+    <div class="adm-table-wrap">
+        <table class="adm-table">
+            <thead>
+                <tr>
+                    <th>Name</th>
+                    <th>Owner</th>
+                    <th>Visibility</th>
+                    <th>Created</th>
+                </tr>
+            </thead>
+            <tbody>
+                {% for league in recent_leagues %}
+                <tr>
+                    <td><a href="{{ url_for('site_admin.league_detail', league_id=league.id) }}">{{ league.name }}</a>{% if league.archived_at %} <span class="adm-pill adm-pill--archived">archived</span>{% endif %}</td>
+                    <td>
+                        {% set owner = owners_by_id.get(league.created_by_user_id) %}
+                        {% if owner %}
+                            <a href="{{ url_for('site_admin.user_detail', user_id=owner.id) }}">{{ owner.email }}</a>
+                        {% else %}
+                            <span class="cell-muted">—</span>
+                        {% endif %}
+                    </td>
+                    <td>
+                        {% if league.visibility == 'public' %}
+                            <span class="adm-pill adm-pill--public">Public</span>
+                        {% else %}
+                            <span class="adm-pill adm-pill--private">Private</span>
+                        {% endif %}
+                    </td>
+                    <td class="cell-muted">{{ league.created_at.strftime('%b %d, %Y') }}</td>
+                </tr>
+                {% endfor %}
+            </tbody>
+        </table>
+    </div>
+    {% else %}
+    <p style="color:var(--faintest);font-size:13px;">No leagues yet.</p>
+    {% endif %}
+</div>
+
+{% endblock %}
+
+{% block extra_scripts %}
+<script>
+(function() {
+    var d = {{ chart_data | safe }};
+    var style = getComputedStyle(document.documentElement);
+    var accent = style.getPropertyValue('--accent').trim() || '#9b8cf0';
+    var pos    = style.getPropertyValue('--pos').trim()    || '#6fc093';
+    var warn   = style.getPropertyValue('--warn').trim()   || '#e0b15c';
+    var faint  = style.getPropertyValue('--faintest').trim() || '#66646f';
+    var border = style.getPropertyValue('--border').trim() || '#26262f';
+
+    Chart.defaults.color = faint;
+    Chart.defaults.font.family = 'inherit';
+    Chart.defaults.font.size = 11;
+
+    new Chart(document.getElementById('userActivityChart'), {
+        type: 'line',
+        data: {
+            labels: d.labels,
+            datasets: [
+                {
+                    label: 'Active users',
+                    data: d.logins,
+                    borderColor: accent,
+                    backgroundColor: accent + '18',
+                    fill: true,
+                    tension: 0.35,
+                    pointRadius: 0,
+                    pointHoverRadius: 4,
+                    borderWidth: 2,
+                },
+                {
+                    label: 'New signups',
+                    data: d.signups,
+                    borderColor: pos,
+                    backgroundColor: 'transparent',
+                    fill: false,
+                    tension: 0.35,
+                    pointRadius: 0,
+                    pointHoverRadius: 4,
+                    borderWidth: 1.5,
+                    borderDash: [5, 3],
+                }
+            ]
+        },
+        options: {
+            responsive: true,
+            interaction: { mode: 'index', intersect: false },
+            plugins: {
+                legend: { position: 'top', labels: { boxWidth: 10, boxHeight: 10, padding: 14, usePointStyle: true } }
+            },
+            scales: {
+                x: { grid: { display: false }, ticks: { maxTicksLimit: 7, color: faint } },
+                y: { beginAtZero: true, grid: { color: border }, ticks: { precision: 0, color: faint } }
+            }
+        }
+    });
+
+    new Chart(document.getElementById('sessionActivityChart'), {
+        type: 'bar',
+        data: {
+            labels: d.labels,
+            datasets: [{
+                label: 'Sessions',
+                data: d.sessions,
+                backgroundColor: warn + '55',
+                borderColor: warn + 'bb',
+                borderWidth: 1,
+                borderRadius: 3,
+                borderSkipped: false,
+            }]
+        },
+        options: {
+            responsive: true,
+            interaction: { mode: 'index', intersect: false },
+            plugins: {
+                legend: { position: 'top', labels: { boxWidth: 10, boxHeight: 10, padding: 14, usePointStyle: true } }
+            },
+            scales: {
+                x: { grid: { display: false }, ticks: { maxTicksLimit: 7, color: faint } },
+                y: { beginAtZero: true, grid: { color: border }, ticks: { precision: 0, color: faint } }
+            }
+        }
+    });
+})();
+</script>
+{% endblock %}
diff --git a/boker/templates/admin/league_detail.html b/boker/templates/admin/league_detail.html
new file mode 100644
index 0000000..0aadc9d
--- /dev/null
+++ b/boker/templates/admin/league_detail.html
@@ -0,0 +1,209 @@
+{% extends "admin/base.html" %}
+{% block title %}{{ league.name }}{% endblock %}
+
+{% block breadcrumb %}
+    <div class="adm-header__breadcrumb">
+        <a href="{{ url_for('site_admin.leagues') }}">Leagues</a>
+        <span class="adm-header__sep">/</span>
+        <span class="adm-header__title">{{ league.name }}</span>
+    </div>
+{% endblock %}
+
+{% block content %}
+
+<div class="adm-card">
+    <div class="adm-card__title">League info</div>
+    <dl class="adm-kv">
+        <div class="adm-kv-row">
+            <dt>Name</dt>
+            <dd><b>{{ league.name }}</b></dd>
+        </div>
+        <div class="adm-kv-row">
+            <dt>League ID</dt>
+            <dd class="adm-mono">{{ league.id }}</dd>
+        </div>
+        <div class="adm-kv-row">
+            <dt>Slug / key</dt>
+            <dd class="adm-mono">{{ league.slug }}-{{ league.public_key }}</dd>
+        </div>
+        {% if league.description %}
+        <div class="adm-kv-row">
+            <dt>Description</dt>
+            <dd>{{ league.description }}</dd>
+        </div>
+        {% endif %}
+        <div class="adm-kv-row">
+            <dt>Visibility</dt>
+            <dd>
+                {% if league.visibility == 'public' %}
+                    <span class="adm-pill adm-pill--public">Public</span>
+                {% else %}
+                    <span class="adm-pill adm-pill--private">Private</span>
+                {% endif %}
+            </dd>
+        </div>
+        <div class="adm-kv-row">
+            <dt>Owner</dt>
+            <dd>
+                {% if owner %}
+                    <a href="{{ url_for('site_admin.user_detail', user_id=owner.id) }}">{{ owner.email }}</a>
+                {% else %}
+                    <span style="color:var(--faintest)">Unknown</span>
+                {% endif %}
+            </dd>
+        </div>
+        <div class="adm-kv-row">
+            <dt>Created</dt>
+            <dd>{{ league.created_at.strftime('%b %d, %Y at %H:%M UTC') }}</dd>
+        </div>
+        <div class="adm-kv-row">
+            <dt>Status</dt>
+            <dd>
+                {% if league.archived_at %}
+                    <span class="adm-pill adm-pill--archived">Archived</span>
+                    <span style="color:var(--faintest);font-size:12px;margin-left:6px;">{{ league.archived_at.strftime('%b %d, %Y') }}</span>
+                {% else %}
+                    <span class="adm-pill adm-pill--active">Active</span>
+                {% endif %}
+            </dd>
+        </div>
+    </dl>
+</div>
+
+<div class="adm-stat-grid" style="margin-bottom:20px;">
+    <div class="adm-stat">
+        <div class="adm-stat__label">Members</div>
+        <div class="adm-stat__val">{{ memberships | length }}</div>
+    </div>
+    <div class="adm-stat">
+        <div class="adm-stat__label">Players</div>
+        <div class="adm-stat__val">{{ player_count }}</div>
+        <div class="adm-stat__sub">added to this league</div>
+    </div>
+    <div class="adm-stat">
+        <div class="adm-stat__label">Sessions</div>
+        <div class="adm-stat__val">{{ session_count }}</div>
+        <div class="adm-stat__sub"><b>{{ open_sessions }}</b> open</div>
+    </div>
+    <div class="adm-stat">
+        <div class="adm-stat__label">Ledger events</div>
+        <div class="adm-stat__val">{{ event_count }}</div>
+    </div>
+</div>
+
+{% if not league.archived_at %}
+<div style="margin-bottom:20px;">
+    <a class="adm-btn adm-btn--ghost" href="{{ url_for('leagues.dashboard', league_ref=league.url_ref) }}" target="_blank">
+        View league →
+    </a>
+</div>
+{% endif %}
+
+{% if memberships %}
+<div class="adm-card">
+    <div class="adm-card__title">Members ({{ memberships | length }})</div>
+    <div class="adm-table-wrap" style="border:none;border-radius:0;margin:0 -20px -20px;">
+        <table class="adm-table">
+            <thead>
+                <tr>
+                    <th>User</th>
+                    <th>Role</th>
+                    <th>Joined league</th>
+                </tr>
+            </thead>
+            <tbody>
+                {% for membership, user in memberships %}
+                <tr>
+                    <td>
+                        <a href="{{ url_for('site_admin.user_detail', user_id=user.id) }}">{{ user.email }}</a>
+                        {% if user.is_site_admin %}<span class="adm-pill adm-pill--admin" style="margin-left:4px;">admin</span>{% endif %}
+                        {% if user.disabled_at %}<span class="adm-pill adm-pill--disabled" style="margin-left:4px;">disabled</span>{% endif %}
+                    </td>
+                    <td><span class="adm-pill adm-pill--{{ membership.role }}">{{ membership.role }}</span></td>
+                    <td class="cell-muted">{{ membership.created_at.strftime('%b %d, %Y') }}</td>
+                </tr>
+                {% endfor %}
+            </tbody>
+        </table>
+    </div>
+</div>
+{% endif %}
+
+<div class="adm-card">
+    <div class="adm-card__title">Admin actions</div>
+
+    <div style="margin-bottom:20px;">
+        <div style="font-size:12px;font-weight:600;color:var(--faintest);text-transform:uppercase;letter-spacing:.05em;margin-bottom:10px;">Send invite</div>
+        <form method="post" action="{{ url_for('site_admin.admin_invite_member', league_id=league.id) }}" style="display:flex;gap:8px;flex-wrap:wrap;align-items:flex-end;">
+            <input type="hidden" name="csrf_token" value="{{ csrf_token() }}">
+            <div style="display:flex;flex-direction:column;gap:4px;flex:1;min-width:180px;">
+                <label style="font-size:11px;color:var(--faintest);">Email</label>
+                <input type="email" name="email" placeholder="user@example.com" required
+                       style="padding:6px 10px;background:var(--field);border:1px solid var(--border-strong);border-radius:var(--r-sm);color:var(--text);font-size:12px;font-family:inherit;">
+            </div>
+            <div style="display:flex;flex-direction:column;gap:4px;">
+                <label style="font-size:11px;color:var(--faintest);">Role</label>
+                <select name="role" style="padding:6px 10px;background:var(--field);border:1px solid var(--border-strong);border-radius:var(--r-sm);color:var(--text);font-size:12px;font-family:inherit;">
+                    <option value="manager">Manager</option>
+                    <option value="viewer">Viewer</option>
+                </select>
+            </div>
+            <button class="adm-btn adm-btn--primary adm-btn--sm" type="submit">Send invite</button>
+        </form>
+    </div>
+
+    {% set has_non_owners = [] %}
+    {% for membership, user in memberships %}{% if membership.role != 'owner' %}{% set _ = has_non_owners.append(1) %}{% endif %}{% endfor %}
+    {% if has_non_owners %}
+    <div style="margin-bottom:20px;border-top:1px solid var(--border);padding-top:16px;">
+        <div style="font-size:12px;font-weight:600;color:var(--faintest);text-transform:uppercase;letter-spacing:.05em;margin-bottom:10px;">Remove member</div>
+        <div class="adm-table-wrap" style="border:none;border-radius:0;margin:0;">
+            <table class="adm-table">
+                <thead>
+                    <tr><th>User</th><th>Role</th><th></th></tr>
+                </thead>
+                <tbody>
+                    {% for membership, user in memberships %}
+                    {% if membership.role != 'owner' %}
+                    <tr>
+                        <td><a href="{{ url_for('site_admin.user_detail', user_id=user.id) }}">{{ user.email }}</a></td>
+                        <td><span class="adm-pill adm-pill--{{ membership.role }}">{{ membership.role }}</span></td>
+                        <td>
+                            <form method="post" action="{{ url_for('site_admin.admin_remove_member', league_id=league.id, user_id=user.id) }}" style="margin:0;display:inline;">
+                                <input type="hidden" name="csrf_token" value="{{ csrf_token() }}">
+                                <button class="adm-btn adm-btn--danger adm-btn--sm" type="submit">Remove</button>
+                            </form>
+                        </td>
+                    </tr>
+                    {% endif %}
+                    {% endfor %}
+                </tbody>
+            </table>
+        </div>
+    </div>
+    {% endif %}
+
+    {% set has_managers = [] %}
+    {% for membership, user in memberships %}{% if membership.role == 'manager' %}{% set _ = has_managers.append((membership, user)) %}{% endif %}{% endfor %}
+    {% if has_managers %}
+    <div style="border-top:1px solid var(--border);padding-top:16px;">
+        <div style="font-size:12px;font-weight:600;color:var(--faintest);text-transform:uppercase;letter-spacing:.05em;margin-bottom:10px;">Transfer ownership</div>
+        <form method="post" action="{{ url_for('site_admin.admin_transfer_ownership', league_id=league.id) }}" style="display:flex;gap:8px;flex-wrap:wrap;align-items:flex-end;">
+            <input type="hidden" name="csrf_token" value="{{ csrf_token() }}">
+            <div style="display:flex;flex-direction:column;gap:4px;flex:1;min-width:180px;">
+                <label style="font-size:11px;color:var(--faintest);">New owner</label>
+                <select name="new_owner_user_id" style="padding:6px 10px;background:var(--field);border:1px solid var(--border-strong);border-radius:var(--r-sm);color:var(--text);font-size:12px;font-family:inherit;">
+                    {% for membership, user in memberships %}
+                    {% if membership.role == 'manager' %}
+                    <option value="{{ user.id }}">{{ user.email }}</option>
+                    {% endif %}
+                    {% endfor %}
+                </select>
+            </div>
+            <button class="adm-btn adm-btn--warn adm-btn--sm" type="submit">Transfer ownership</button>
+        </form>
+    </div>
+    {% endif %}
+</div>
+
+{% endblock %}
diff --git a/boker/templates/admin/leagues.html b/boker/templates/admin/leagues.html
new file mode 100644
index 0000000..b4a8f75
--- /dev/null
+++ b/boker/templates/admin/leagues.html
@@ -0,0 +1,90 @@
+{% extends "admin/base.html" %}
+{% block title %}Leagues{% endblock %}
+{% block page_title %}Leagues <span style="color:var(--faintest);font-weight:400;font-size:12px;margin-left:6px;">{{ total }}</span>{% endblock %}
+
+{% block content %}
+
+<form class="adm-search" method="get">
+    <input type="search" name="q" value="{{ search }}" placeholder="Search by name or owner email…" autofocus>
+    <select name="visibility" style="padding:8px 10px;background:var(--field);border:1px solid var(--border-strong);border-radius:var(--r-sm);color:var(--text);font-size:13px;font-family:inherit;">
+        <option value="" {% if not visibility %}selected{% endif %}>All visibility</option>
+        <option value="public" {% if visibility == 'public' %}selected{% endif %}>Public</option>
+        <option value="private" {% if visibility == 'private' %}selected{% endif %}>Private</option>
+    </select>
+    <label style="display:flex;align-items:center;gap:6px;font-size:13px;color:var(--text-2);white-space:nowrap;">
+        <input type="checkbox" name="archived" value="1" {% if show_archived %}checked{% endif %}> Show archived
+    </label>
+    <button class="adm-btn adm-btn--primary" type="submit">Filter</button>
+    {% if search or visibility or show_archived %}
+        <a class="adm-btn adm-btn--ghost" href="{{ url_for('site_admin.leagues') }}">Clear</a>
+    {% endif %}
+</form>
+
+{% if leagues %}
+<div class="adm-table-wrap">
+    <table class="adm-table">
+        <thead>
+            <tr>
+                <th>Name</th>
+                <th>Owner</th>
+                <th>Visibility</th>
+                <th>Members</th>
+                <th>Sessions</th>
+                <th>Created</th>
+                <th>Status</th>
+            </tr>
+        </thead>
+        <tbody>
+            {% for league in leagues %}
+            <tr>
+                <td><a href="{{ url_for('site_admin.league_detail', league_id=league.id) }}">{{ league.name }}</a></td>
+                <td>
+                    {% set owner = owners_by_id.get(league.created_by_user_id) %}
+                    {% if owner %}
+                        <a href="{{ url_for('site_admin.user_detail', user_id=owner.id) }}">{{ owner.email }}</a>
+                    {% else %}
+                        <span class="cell-muted">—</span>
+                    {% endif %}
+                </td>
+                <td>
+                    {% if league.visibility == 'public' %}
+                        <span class="adm-pill adm-pill--public">Public</span>
+                    {% else %}
+                        <span class="adm-pill adm-pill--private">Private</span>
+                    {% endif %}
+                </td>
+                <td class="cell-muted">{{ member_counts.get(league.id, 0) }}</td>
+                <td class="cell-muted">{{ session_counts.get(league.id, 0) }}</td>
+                <td class="cell-muted">{{ league.created_at.strftime('%b %d, %Y') }}</td>
+                <td>
+                    {% if league.archived_at %}
+                        <span class="adm-pill adm-pill--archived">Archived</span>
+                    {% else %}
+                        <span class="adm-pill adm-pill--active">Active</span>
+                    {% endif %}
+                </td>
+            </tr>
+            {% endfor %}
+        </tbody>
+    </table>
+</div>
+
+{% if total_pages > 1 %}
+<div class="adm-pagination">
+    {% if page > 1 %}
+        <a href="{{ url_for('site_admin.leagues', q=search, visibility=visibility, archived='1' if show_archived else '', page=page-1) }}">← Prev</a>
+    {% endif %}
+    <span>Page {{ page }} of {{ total_pages }}</span>
+    {% if page < total_pages %}
+        <a href="{{ url_for('site_admin.leagues', q=search, visibility=visibility, archived='1' if show_archived else '', page=page+1) }}">Next →</a>
+    {% endif %}
+</div>
+{% endif %}
+
+{% else %}
+<p style="color:var(--faintest);font-size:13px;">
+    {% if search or visibility %}No leagues matching those filters.{% else %}No leagues yet.{% endif %}
+</p>
+{% endif %}
+
+{% endblock %}
diff --git a/boker/templates/admin/user_detail.html b/boker/templates/admin/user_detail.html
new file mode 100644
index 0000000..95c27eb
--- /dev/null
+++ b/boker/templates/admin/user_detail.html
@@ -0,0 +1,168 @@
+{% extends "admin/base.html" %}
+{% block title %}{{ user.email }}{% endblock %}
+
+{% block breadcrumb %}
+    <div class="adm-header__breadcrumb">
+        <a href="{{ url_for('site_admin.users') }}">Users</a>
+        <span class="adm-header__sep">/</span>
+        <span class="adm-header__title">{{ user.email }}</span>
+    </div>
+{% endblock %}
+
+{% block content %}
+
+<div class="adm-card">
+    <div class="adm-card__title">Account</div>
+    <dl class="adm-kv">
+        <div class="adm-kv-row">
+            <dt>Email</dt>
+            <dd><b>{{ user.email }}</b></dd>
+        </div>
+        <div class="adm-kv-row">
+            <dt>User ID</dt>
+            <dd class="adm-mono">{{ user.id }}</dd>
+        </div>
+        <div class="adm-kv-row">
+            <dt>Joined</dt>
+            <dd>{{ user.created_at.strftime('%b %d, %Y at %H:%M UTC') }}</dd>
+        </div>
+        <div class="adm-kv-row">
+            <dt>Last login</dt>
+            <dd>{% if user.last_login_at %}{{ user.last_login_at.strftime('%b %d, %Y at %H:%M UTC') }}{% else %}<span style="color:var(--faintest)">Never</span>{% endif %}</dd>
+        </div>
+        <div class="adm-kv-row">
+            <dt>Status</dt>
+            <dd>
+                {% if user.disabled_at %}
+                    <span class="adm-pill adm-pill--disabled">Disabled</span>
+                    <span style="color:var(--faintest);font-size:12px;margin-left:6px;">since {{ user.disabled_at.strftime('%b %d, %Y') }}</span>
+                {% else %}
+                    <span class="adm-pill adm-pill--active">Active</span>
+                {% endif %}
+            </dd>
+        </div>
+        <div class="adm-kv-row">
+            <dt>Site admin</dt>
+            <dd>
+                {% if user.is_site_admin %}
+                    <span class="adm-pill adm-pill--admin">Yes</span>
+                {% else %}
+                    <span style="color:var(--faintest)">No</span>
+                {% endif %}
+            </dd>
+        </div>
+        <div class="adm-kv-row">
+            <dt>Leagues</dt>
+            <dd>{{ memberships | length }}</dd>
+        </div>
+    </dl>
+</div>
+
+<div class="adm-card">
+    <div class="adm-card__title">Actions</div>
+
+    <div class="adm-section" style="margin-bottom:20px;">
+        <div class="adm-section__title" style="margin-bottom:8px;">Password reset</div>
+        <div class="adm-actions">
+            <form class="adm-inline-form" method="post" action="{{ url_for('site_admin.send_reset', user_id=user.id) }}">
+                <input type="hidden" name="csrf_token" value="{{ csrf_token() }}">
+                <button class="adm-btn adm-btn--ghost" type="submit"{% if user.disabled_at %} disabled title="Account is disabled"{% endif %}>
+                    Send reset email
+                </button>
+            </form>
+            <a class="adm-btn adm-btn--ghost" href="{{ url_for('site_admin.user_detail', user_id=user.id, show_reset=1) }}">
+                Generate link (no email)
+            </a>
+        </div>
+        {% if reset_url %}
+        <div class="adm-reset-box">
+            <div class="adm-reset-box__label">Reset link — valid 1 hour</div>
+            <div class="adm-reset-box__url">{{ reset_url }}</div>
+        </div>
+        {% endif %}
+    </div>
+
+    <div class="adm-section" style="margin-bottom:20px;">
+        <div class="adm-section__title" style="margin-bottom:8px;">Set password directly</div>
+        <form class="adm-pass-form" method="post" action="{{ url_for('site_admin.admin_reset_password', user_id=user.id) }}">
+            <input type="hidden" name="csrf_token" value="{{ csrf_token() }}">
+            <input type="password" name="new_password" placeholder="New password (min 8 chars)" autocomplete="new-password">
+            <button class="adm-btn adm-btn--warn" type="submit">Set password</button>
+        </form>
+    </div>
+
+    {% if not viewing_self %}
+    <div class="adm-section" style="margin-bottom:20px;">
+        <div class="adm-section__title" style="margin-bottom:8px;">Account status</div>
+        <div class="adm-actions">
+            {% if user.disabled_at %}
+            <form class="adm-inline-form" method="post" action="{{ url_for('site_admin.enable_user', user_id=user.id) }}">
+                <input type="hidden" name="csrf_token" value="{{ csrf_token() }}">
+                <button class="adm-btn adm-btn--ghost" type="submit">Enable account</button>
+            </form>
+            {% else %}
+            <form class="adm-inline-form" method="post" action="{{ url_for('site_admin.disable_user', user_id=user.id) }}">
+                <input type="hidden" name="csrf_token" value="{{ csrf_token() }}">
+                <button class="adm-btn adm-btn--danger" type="submit">Disable account</button>
+            </form>
+            {% endif %}
+        </div>
+    </div>
+
+    <div class="adm-section">
+        <div class="adm-section__title" style="margin-bottom:8px;">Admin access</div>
+        <div class="adm-actions">
+            {% if user.is_site_admin %}
+            <form class="adm-inline-form" method="post" action="{{ url_for('site_admin.revoke_admin', user_id=user.id) }}">
+                <input type="hidden" name="csrf_token" value="{{ csrf_token() }}">
+                <button class="adm-btn adm-btn--danger" type="submit">Revoke admin</button>
+            </form>
+            {% else %}
+            <form class="adm-inline-form" method="post" action="{{ url_for('site_admin.grant_admin', user_id=user.id) }}">
+                <input type="hidden" name="csrf_token" value="{{ csrf_token() }}">
+                <button class="adm-btn adm-btn--ghost" type="submit">Grant admin</button>
+            </form>
+            {% endif %}
+        </div>
+    </div>
+    {% endif %}
+</div>
+
+{% if memberships %}
+<div class="adm-card">
+    <div class="adm-card__title">League memberships ({{ memberships | length }})</div>
+    <div class="adm-table-wrap" style="border:none;border-radius:0;margin:0 -20px -20px;">
+        <table class="adm-table">
+            <thead>
+                <tr>
+                    <th>League</th>
+                    <th>Role</th>
+                    <th>Visibility</th>
+                    <th>Joined</th>
+                </tr>
+            </thead>
+            <tbody>
+                {% for membership, league in memberships %}
+                <tr>
+                    <td>
+                        <a href="{{ url_for('site_admin.league_detail', league_id=league.id) }}">{{ league.name }}</a>
+                        {% if league.archived_at %}<span class="adm-pill adm-pill--archived" style="margin-left:4px;">archived</span>{% endif %}
+                    </td>
+                    <td><span class="adm-pill adm-pill--{{ membership.role }}">{{ membership.role }}</span></td>
+                    <td>
+                        {% if league.visibility == 'public' %}
+                            <span class="adm-pill adm-pill--public">Public</span>
+                        {% else %}
+                            <span class="adm-pill adm-pill--private">Private</span>
+                        {% endif %}
+                    </td>
+                    <td class="cell-muted">{{ membership.created_at.strftime('%b %d, %Y') }}</td>
+                </tr>
+                {% endfor %}
+            </tbody>
+        </table>
+    </div>
+</div>
+{% endif %}
+
+{% endblock %}
diff --git a/boker/templates/admin/users.html b/boker/templates/admin/users.html
new file mode 100644
index 0000000..80cc6c3
--- /dev/null
+++ b/boker/templates/admin/users.html
@@ -0,0 +1,68 @@
+{% extends "admin/base.html" %}
+{% block title %}Users{% endblock %}
+{% block page_title %}Users <span style="color:var(--faintest);font-weight:400;font-size:12px;margin-left:6px;">{{ total }}</span>{% endblock %}
+
+{% block content %}
+
+<form class="adm-search" method="get">
+    <input type="search" name="q" value="{{ search }}" placeholder="Search by email…" autofocus>
+    <button class="adm-btn adm-btn--primary" type="submit">Search</button>
+    {% if search %}<a class="adm-btn adm-btn--ghost" href="{{ url_for('site_admin.users') }}">Clear</a>{% endif %}
+</form>
+
+{% if users %}
+<div class="adm-table-wrap">
+    <table class="adm-table">
+        <thead>
+            <tr>
+                <th>Email</th>
+                <th>Joined</th>
+                <th>Last login</th>
+                <th>Leagues</th>
+                <th>Status</th>
+            </tr>
+        </thead>
+        <tbody>
+            {% for user in users %}
+            <tr>
+                <td>
+                    <a href="{{ url_for('site_admin.user_detail', user_id=user.id) }}">{{ user.email }}</a>
+                    {% if user.is_site_admin %}<span class="adm-pill adm-pill--admin" style="margin-left:4px;">admin</span>{% endif %}
+                </td>
+                <td class="cell-muted">{{ user.created_at.strftime('%b %d, %Y') }}</td>
+                <td class="cell-muted">
+                    {% if user.last_login_at %}{{ user.last_login_at.strftime('%b %d, %Y') }}{% else %}—{% endif %}
+                </td>
+                <td class="cell-muted">{{ league_counts.get(user.id, 0) }}</td>
+                <td>
+                    {% if user.disabled_at %}
+                        <span class="adm-pill adm-pill--disabled">Disabled</span>
+                    {% else %}
+                        <span class="adm-pill adm-pill--active">Active</span>
+                    {% endif %}
+                </td>
+            </tr>
+            {% endfor %}
+        </tbody>
+    </table>
+</div>
+
+{% if total_pages > 1 %}
+<div class="adm-pagination">
+    {% if page > 1 %}
+        <a href="{{ url_for('site_admin.users', q=search, page=page-1) }}">← Prev</a>
+    {% endif %}
+    <span>Page {{ page }} of {{ total_pages }}</span>
+    {% if page < total_pages %}
+        <a href="{{ url_for('site_admin.users', q=search, page=page+1) }}">Next →</a>
+    {% endif %}
+</div>
+{% endif %}
+
+{% else %}
+<p style="color:var(--faintest);font-size:13px;">
+    {% if search %}No users matching "{{ search }}".{% else %}No users yet.{% endif %}
+</p>
+{% endif %}
+
+{% endblock %}
diff --git a/boker/templates/league_settings.html b/boker/templates/league_settings.html
index 4f316fb..54ba9cd 100644
--- a/boker/templates/league_settings.html
+++ b/boker/templates/league_settings.html
@@ -64,18 +64,33 @@
                     <span>Email</span>
                     <input type="email" name="email" placeholder="friend@example.com" required>
                 </label>
-                <label style="flex:0 0 130px;">
+                <label style="flex:0 0 140px;">
                     <span>Role</span>
                     <select name="role">
                         <option value="manager">Manager</option>
                         <option value="viewer">Viewer</option>
                     </select>
                 </label>
-                <button class="btn btn--primary btn--sm" type="submit" style="flex:0 0 auto;margin-bottom:1px;">Send invite</button>
+                <button class="btn btn--primary" type="submit" style="flex:0 0 auto;">Send invite</button>
             </div>
         </form>
     </div>
 
+    {% if has_managers %}
+    <div class="panel">
+        <div class="panel__head">
+            <div>
+                <p class="kicker" style="margin:0;">Ownership</p>
+                <h2 class="panel__title">Transfer league ownership</h2>
+            </div>
+        </div>
+        <div class="panel__body">
+            <p class="muted-text">Transfer ownership of this league to one of your managers. You will become a manager and lose owner privileges.</p>
+            <button class="btn btn--ghost btn--sm" type="button" data-modal="modal-transfer" style="margin-top:8px;">Transfer ownership</button>
+        </div>
+    </div>
+    {% endif %}
+
     <div class="panel">
         <div class="panel__head">
             <div>
@@ -96,6 +111,48 @@
 
 </div>
 
+{% if has_managers %}
+<div class="modal-backdrop" id="modal-transfer" hidden>
+    <div class="modal-card">
+        <div class="modal-card__head">
+            <h2 style="font-size:18px;margin:0;">Transfer ownership</h2>
+        </div>
+        <p class="modal-card__text">
+            Select a manager to become the new owner. You will become a manager and lose owner privileges. This cannot be undone without their help.<br><br>
+            Type the league name to confirm:
+        </p>
+        <form method="post" action="{{ url_for('leagues.transfer_ownership', league_ref=league.url_ref) }}">
+            <input type="hidden" name="csrf_token" value="{{ csrf_token() }}">
+            <div style="padding:0 20px 12px;">
+                <label style="font-size:12px;color:var(--text-2);display:block;margin-bottom:4px;">New owner</label>
+                <select name="new_owner_user_id" style="width:100%;padding:8px 10px;border:1px solid var(--border-strong);border-radius:var(--r-sm);background:var(--field);color:var(--text);font-family:inherit;font-size:13px;">
+                    {% for membership, member_user in members %}
+                    {% if membership.role == 'manager' %}
+                    <option value="{{ member_user.id }}">{{ member_user.email }}</option>
+                    {% endif %}
+                    {% endfor %}
+                </select>
+            </div>
+            <div style="padding:0 20px 16px;">
+                <input
+                    class="modal-confirm-input"
+                    type="text"
+                    name="confirm_name"
+                    placeholder="{{ league.name }}"
+                    autocomplete="off"
+                    data-match="{{ league.name }}"
+                    data-target="transfer-confirm-btn"
+                >
+            </div>
+            <div class="modal-card__actions">
+                <button class="btn btn--ghost btn--sm" type="button" data-close-modal>Cancel</button>
+                <button class="btn btn--sm btn--danger" id="transfer-confirm-btn" type="submit" disabled>Transfer ownership</button>
+            </div>
+        </form>
+    </div>
+</div>
+{% endif %}
+
 <div class="modal-backdrop" id="modal-archive" hidden>
     <div class="modal-card">
         <div class="modal-card__head">
diff --git a/migrations/versions/0003_site_admin.py b/migrations/versions/0003_site_admin.py
new file mode 100644
index 0000000..06fe0ac
--- /dev/null
+++ b/migrations/versions/0003_site_admin.py
@@ -0,0 +1,32 @@
+"""add is_site_admin to users
+
+Revision ID: 0003_site_admin
+Revises: 0002_league_public_key
+Create Date: 2026-06-24
+"""
+from __future__ import annotations
+
+import sqlalchemy as sa
+from alembic import op
+
+revision = "0003_site_admin"
+down_revision = "0002_league_public_key"
+branch_labels = None
+depends_on = None
+
+
+def upgrade() -> None:
+    with op.batch_alter_table("users") as batch_op:
+        batch_op.add_column(
+            sa.Column(
+                "is_site_admin",
+                sa.Boolean(),
+                nullable=False,
+                server_default=sa.false(),
+            )
+        )
+
+
+def downgrade() -> None:
+    with op.batch_alter_table("users") as batch_op:
+        batch_op.drop_column("is_site_admin")