export async function loadArena() {
  const ui = document.querySelector(".building-ui");

  ui.innerHTML = `
<div id="arena-ui">

  <!-- Modus-Auswahl -->
  <div id="arena-mode-screen">
    <div class="arena-title">⚔️ Kampfarena</div>
    <p class="arena-subtitle">Wähle deinen Kampfmodus</p>
    <div class="arena-modes">
      <div class="arena-mode-card" data-mode="1v1">
        <div class="arena-mode-icon">🗡️</div>
        <div class="arena-mode-label">1v1</div>
        <div class="arena-mode-desc">Einzelkampf – Beweis deine Stärke im Duell</div>
      </div>
      <div class="arena-mode-card" data-mode="2v2">
        <div class="arena-mode-icon">⚔️</div>
        <div class="arena-mode-label">2v2</div>
        <div class="arena-mode-desc">Verbünde dich mit einem Kameraden im Kampf</div>
      </div>
      <div class="arena-mode-card" data-mode="4v4">
        <div class="arena-mode-icon">🛡️</div>
        <div class="arena-mode-label">4v4</div>
        <div class="arena-mode-desc">Schlachtruf – Führe deine Truppe zum Sieg</div>
      </div>
    </div>
    <div id="arena-queue-status" style="display:none;"></div>
  </div>

  <!-- 2v2 Lobby-Screen -->
  <div id="arena-2v2-screen" style="display:none;">
    <div class="arena-lobby-header">
      <button class="arena-back-btn" data-back="2v2">← Zurück</button>
      <div class="arena-title" style="margin:0;">⚔️ 2v2 Team-Lobby</div>
    </div>
    <div id="arena-2v2-error" style="display:none;"></div>
    <div id="arena-2v2-team-panel" style="display:none;">
      <div class="arena-team-box">
        <div class="arena-team-title">Dein Team (2v2)</div>
        <div id="arena-2v2-team-players"></div>
        <div id="arena-2v2-team-actions"></div>
      </div>
      <div id="arena-2v2-team-status"></div>
    </div>
    <div id="arena-2v2-lobby-section">
      <div class="arena-lobby-actions">
        <button class="arena-btn-create" data-create="2v2">＋ Eigenes Team erstellen</button>
      </div>
      <div class="arena-lobby-title">Offene Teams</div>
      <div id="arena-2v2-lobby-list"><div class="arena-lobby-empty">Keine offenen Teams vorhanden.</div></div>
    </div>
  </div>

  <!-- 4v4 Lobby-Screen -->
  <div id="arena-4v4-screen" style="display:none;">
    <div class="arena-lobby-header">
      <button class="arena-back-btn" data-back="4v4">← Zurück</button>
      <div class="arena-title" style="margin:0;">🛡️ 4v4 Team-Lobby</div>
    </div>
    <div id="arena-4v4-error" style="display:none;"></div>
    <div id="arena-4v4-team-panel" style="display:none;">
      <div class="arena-team-box">
        <div class="arena-team-title">Dein Team (4v4)</div>
        <div id="arena-4v4-team-players"></div>
        <div id="arena-4v4-team-actions"></div>
      </div>
      <div id="arena-4v4-team-status"></div>
    </div>
    <div id="arena-4v4-lobby-section">
      <div class="arena-lobby-actions">
        <button class="arena-btn-create" data-create="4v4">＋ Eigenes Team erstellen</button>
      </div>
      <div class="arena-lobby-title">Offene Teams</div>
      <div id="arena-4v4-lobby-list"><div class="arena-lobby-empty">Keine offenen Teams vorhanden.</div></div>
    </div>
  </div>

</div>
`;

  injectArenaStyles();
  initArenaModes();
}

/* ── Styles ─────────────────────────────────────────────────────────────────── */
function injectArenaStyles() {
  if (document.getElementById("arena-popup-styles")) return;
  const style = document.createElement("style");
  style.id = "arena-popup-styles";
  style.textContent = `
    @keyframes arenaFadeIn  { from { opacity:0; } to { opacity:1; } }
    @keyframes arenaScaleIn { from { transform:scale(0.94); opacity:0; } to { transform:scale(1); opacity:1; } }
    @keyframes pulse        { 0%,100%{opacity:1;} 50%{opacity:0.5;} }

    #arena-queue-status {
      margin-top:18px; padding:12px 20px; border-radius:10px;
      background:rgba(255,215,80,0.08); border:1px solid rgba(255,215,80,0.3);
      color:#dceb15; font-family:"Cinzel",serif; font-size:13px;
      letter-spacing:1px; text-align:center; animation:pulse 2s ease-in-out infinite;
    }
    #arena-queue-status .qs-cancel {
      display:inline-block; margin-top:8px; font-size:11px;
      color:rgba(255,100,100,0.8); cursor:pointer; text-decoration:underline; animation:none;
    }
    #arena-queue-status .qs-cancel:hover { color:#e74c3c; }

    #arena-2v2-error, #arena-4v4-error {
      padding:10px 14px; border-radius:8px; margin-bottom:8px;
      background:rgba(231,76,60,0.12); border:1px solid rgba(231,76,60,0.4);
      color:#e74c3c; font-family:"Cinzel",serif; font-size:12px; text-align:center;
    }

    #arena-backdrop { position:fixed; inset:0; background:rgba(0,0,0,0.82); backdrop-filter:blur(5px); z-index:9998; animation:arenaFadeIn 0.25s ease; }
    #arena-popup {
      position:fixed; inset:50px; z-index:9999; display:flex; flex-direction:column;
      border-radius:14px; overflow:hidden;
      box-shadow: 0 0 0 1px rgba(255,215,80,0.35), 0 30px 90px rgba(0,0,0,0.85);
      animation:arenaScaleIn 0.28s cubic-bezier(0.22,1,0.36,1);
    }
    #arena-popup-titlebar {
      display:flex; align-items:center; justify-content:space-between;
      background:rgba(10,8,5,0.95); border-bottom:1px solid rgba(255,215,80,0.3);
      padding:0 16px; height:42px; flex-shrink:0;
    }
    #arena-popup-titlebar .ap-title { font-family:"Cinzel",serif; font-size:13px; letter-spacing:4px; color:rgba(255,215,80,0.85); text-transform:uppercase; }
    #arena-popup-titlebar .ap-url   { font-size:11px; color:rgba(255,255,255,0.22); }
    #arena-popup iframe { flex:1; border:none; width:100%; display:block; }

    #match-found-overlay {
      position:fixed; inset:0; z-index:10000; background:rgba(0,0,0,0.9);
      display:flex; flex-direction:column; align-items:center; justify-content:center;
      animation:arenaFadeIn 0.3s ease;
    }
    #match-found-overlay .mfo-title { font-family:"Cinzel",serif; font-size:36px; color:#ffd750; text-shadow:0 0 30px rgba(255,215,80,0.6); letter-spacing:6px; margin-bottom:12px; }
    #match-found-overlay .mfo-vs    { font-family:"Cinzel",serif; font-size:18px; color:rgba(255,255,255,0.75); letter-spacing:3px; }
    #match-found-overlay .mfo-bar   { width:300px; height:4px; background:rgba(255,215,80,0.2); border-radius:2px; margin-top:24px; overflow:hidden; }
    #match-found-overlay .mfo-bar-fill { height:100%; background:#ffd750; width:0%; border-radius:2px; transition:width 1.5s ease; }

    .arena-mode-card.searching { opacity:0.6; pointer-events:none; border-color:rgba(255,215,80,0.5)!important; }

    #arena-2v2-screen, #arena-4v4-screen {
      flex-direction:column; gap:14px; padding:16px; height:100%; overflow-y:auto;
    }
    .arena-lobby-header { display:flex; align-items:center; gap:16px; }
    .arena-back-btn {
      background:none; border:1px solid rgba(255,200,80,0.3); color:#c8960c;
      font-family:"Cinzel",serif; font-size:12px; padding:4px 12px; border-radius:4px; cursor:pointer;
    }
    .arena-back-btn:hover { background:rgba(200,150,12,0.15); }
    .arena-lobby-actions { display:flex; gap:10px; margin-bottom:4px; }
    .arena-btn-create {
      background:linear-gradient(#4a3018,#2a1a08); border:2px solid #8b6a3c; border-radius:7px;
      color:#f0d9a6; font-family:"Cinzel",serif; font-size:12px; padding:8px 16px; cursor:pointer; transition:0.2s;
    }
    .arena-btn-create:hover { border-color:#f0d060; }
    .arena-lobby-title { font-family:"Cinzel",serif; font-size:13px; color:#a08060; letter-spacing:1px; margin-bottom:6px; }
    .arena-lobby-empty { font-family:"Cinzel",serif; font-size:12px; color:#606060; padding:12px 0; }
    .arena-lobby-row {
      display:flex; align-items:center; justify-content:space-between;
      background:linear-gradient(#2a1a08,#1a0f04); border:1px solid #6b4b2a;
      border-radius:8px; padding:10px 14px; margin-bottom:6px;
    }
    .arena-lobby-row-info { display:flex; align-items:center; gap:12px; }
    .arena-lobby-leader { font-family:"Cinzel",serif; font-size:13px; color:#f0d9a6; }
    .arena-lobby-level  { font-size:11px; color:#a08060; }
    .arena-lobby-count  { font-size:11px; color:#6a9a4a; }
    .arena-btn-join {
      background:linear-gradient(#1a4a18,#0f2a0e); border:2px solid #4a8a3c; border-radius:6px;
      color:#a0e090; font-family:"Cinzel",serif; font-size:11px; padding:5px 12px; cursor:pointer; transition:0.2s;
    }
    .arena-btn-join:hover { border-color:#8ae060; color:#c0f0a0; }

    .arena-team-box { background:linear-gradient(#2a1a08,#1a0f04); border:2px solid #6b4b2a; border-radius:10px; padding:14px; }
    .arena-team-title { font-family:"Cinzel",serif; font-size:13px; color:#f0d060; letter-spacing:2px; margin-bottom:10px; }
    .arena-team-player {
      display:flex; align-items:center; gap:10px; padding:7px 10px;
      border:1px solid #3a2810; border-radius:6px; margin-bottom:5px; background:rgba(255,255,255,0.03);
    }
    .arena-team-player.ready { border-color:#4a8a3c; background:rgba(74,138,60,0.1); }
    .arena-team-player-name   { font-family:"Cinzel",serif; font-size:12px; color:#f0d9a6; flex:1; }
    .arena-team-player-level  { font-size:11px; color:#a08060; }
    .arena-team-player-status { font-size:11px; }
    .arena-waiting-partner    { font-family:"Cinzel",serif; font-size:11px; color:#a08060; text-align:center; padding:8px; animation:pulse 2s ease-in-out infinite; }
    .arena-btn-ready {
      width:100%; margin-top:10px; background:linear-gradient(#1a4a18,#0f2a0e); border:2px solid #4a8a3c;
      border-radius:8px; color:#a0e090; font-family:"Cinzel",serif; font-size:14px; padding:10px; cursor:pointer; transition:0.2s;
    }
    .arena-btn-ready:hover:not([disabled]) { border-color:#8ae060; background:linear-gradient(#2a6a28,#1a3a18); }
    .arena-btn-ready.active { border-color:#8ae060; color:#c0f0a0; cursor:default; }
    .arena-searching-box {
      font-family:"Cinzel",serif; font-size:12px; color:#dceb15; text-align:center;
      padding:10px; border:1px solid rgba(255,215,80,0.3); border-radius:8px; margin-top:8px;
      animation:pulse 2s ease-in-out infinite;
    }
    .arena-team-slots {
      font-family:"Cinzel",serif; font-size:11px; color:#a08060;
      text-align:center; padding:4px 0 8px;
    }
  `;
  document.head.appendChild(style);
}

/* ── Socket ─────────────────────────────────────────────────────────────────── */
function getSocket() { return window._socket || null; }

/* ── State ──────────────────────────────────────────────────────────────────── */
let myArenaData   = null;
let my2v2TeamId   = null;
let my4v4TeamId   = null;

/* ── Modus-Klicks ───────────────────────────────────────────────────────────── */
function initArenaModes() {
  document.querySelectorAll(".arena-mode-card").forEach(card => {
    card.addEventListener("click", () => {
      const mode = card.dataset.mode;
      if (mode === "1v1")      handle1v1Click(card);
      else if (mode === "2v2") openTeamLobby("2v2");
      else if (mode === "4v4") openTeamLobby("4v4");
    });
  });

  /* Zurück-Buttons */
  document.addEventListener("click", e => {
    const btn = e.target.closest(".arena-back-btn");
    if (!btn) return;
    const mode = btn.dataset.back;
    if (!mode) return;
    leaveTeam(mode);
    document.getElementById(`arena-${mode}-screen`).style.display = "none";
    document.getElementById("arena-mode-screen").style.display    = "";
    if (mode === "2v2") my2v2TeamId = null;
    if (mode === "4v4") my4v4TeamId = null;
  });

  /* Team erstellen Buttons */
  document.addEventListener("click", e => {
    const btn = e.target.closest(".arena-btn-create");
    if (!btn) return;
    const mode = btn.dataset.create;
    if (!mode) return;
    const socket = getSocket();
    if (!socket) return showModeError(mode, "Keine Verbindung zum Server.");
    console.log(`[${mode}] Team erstellen – sende create_${mode}_team mit:`, myArenaData);
    socket.emit(`create_${mode}_team`, myArenaData);
  });
}

/* ── Team-Lobby öffnen (2v2 oder 4v4) ──────────────────────────────────────── */
async function openTeamLobby(mode) {
  const socket = getSocket();

  /* Screen sofort wechseln */
  document.getElementById("arena-mode-screen").style.display    = "none";
  document.getElementById(`arena-${mode}-screen`).style.display = "flex";

  if (!socket) {
    showModeError(mode, "Keine Verbindung zum Server. Bitte Seite neu laden.");
    return;
  }

  /* Spielerdaten laden */
  if (!myArenaData) {
    try {
      const res = await fetch("/arena/me");
      if (!res.ok) throw new Error("HTTP " + res.status);
      myArenaData = await res.json();
      console.log(`[${mode}] Spielerdaten:`, myArenaData);
    } catch (err) {
      console.error(`[${mode}] Spielerdaten Fehler:`, err);
      showModeError(mode, "Spielerdaten konnten nicht geladen werden. (Eingeloggt?)");
      return;
    }
  }

  /* Lobbyliste anfordern */
  socket.emit(`get_${mode}_lobbies`);

  /* Alte Listener entfernen */
  socket.off(`${mode}_lobbies`);
  socket.off(`${mode}_team_joined`);
  socket.off(`${mode}_team_update`);
  socket.off(`${mode}_partner_left`);
  socket.off(`${mode}_searching`);
  socket.off(`match_found_${mode}`);
  socket.off(`${mode}_error`);

  /* Listener registrieren */
  socket.on(`${mode}_lobbies`, list => renderLobbyList(list, socket, mode));

  socket.on(`${mode}_team_joined`, data => {
    if (mode === "2v2") my2v2TeamId = data.teamId;
    if (mode === "4v4") my4v4TeamId = data.teamId;
    document.getElementById(`arena-${mode}-team-panel`).style.display    = "block";
    document.getElementById(`arena-${mode}-lobby-section`).style.display = "none";
    hideModeError(mode);
  });

  socket.on(`${mode}_team_update`, data => renderTeamPanel(data, socket, mode));

  socket.on(`${mode}_partner_left`, data => {
    const status = document.getElementById(`arena-${mode}-team-status`);
    if (status) status.innerHTML = `<span style="color:#e74c3c;">⚠️ ${data.name} hat das Team verlassen.</span>`;
    const teamId = mode === "2v2" ? my2v2TeamId : my4v4TeamId;
    renderTeamPanel({ teamId, players: [{ name: myArenaData.name, level: myArenaData.level, ready: false }], count: 1, max: mode === "4v4" ? 4 : 2 }, socket, mode);
  });

  socket.on(`${mode}_searching`, () => {
    const status  = document.getElementById(`arena-${mode}-team-status`);
    const actions = document.getElementById(`arena-${mode}-team-actions`);
    if (status)  status.innerHTML  = `<div class="arena-searching-box">⏳ Suche nach Gegnerteam…</div>`;
    if (actions) actions.innerHTML = "";
  });

  socket.on(`match_found_${mode}`, data => {
    socket.off(`${mode}_lobbies`);
    socket.off(`${mode}_team_update`);
    socket.off(`${mode}_partner_left`);
    socket.off(`${mode}_searching`);

    showMatchFoundOverlay(myArenaData.name, `Team ${data.myTeam === 1 ? 2 : 1}`, () => {
      document.getElementById(`arena-${mode}-screen`).style.display = "none";
      document.getElementById("arena-mode-screen").style.display    = "";
      openArenaPopup(
        `/arena/${mode}?match=${encodeURIComponent(data.matchId)}&slot=${encodeURIComponent(data.mySlot)}`,
        data.opponents?.join(" & ") || "Gegner",
        data.matchId,
      );
    });
  });

  socket.on(`${mode}_error`, data => {
    console.warn(`[${mode}] Fehler:`, data.message);
    showModeError(mode, data.message);
  });
}

/* ── Lobby-Liste rendern ────────────────────────────────────────────────────── */
function renderLobbyList(list, socket, mode) {
  const el = document.getElementById(`arena-${mode}-lobby-list`);
  if (!el) return;
  const max = mode === "4v4" ? 4 : 2;
  if (!list.length) {
    el.innerHTML = `<div class="arena-lobby-empty">Keine offenen Teams vorhanden.</div>`;
    return;
  }
  el.innerHTML = list.map(team => `
    <div class="arena-lobby-row">
      <div class="arena-lobby-row-info">
        <span class="arena-lobby-leader">⚔️ ${team.leader}</span>
        <span class="arena-lobby-level">Lvl ${team.leaderLevel}</span>
        <span class="arena-lobby-count">${team.count}/${max} Spieler</span>
      </div>
      <button class="arena-btn-join" data-teamid="${team.teamId}">Beitreten</button>
    </div>
  `).join("");

  el.querySelectorAll(".arena-btn-join").forEach(btn => {
    btn.addEventListener("click", () => {
      socket.emit(`join_${mode}_team`, { teamId: btn.dataset.teamid, playerData: myArenaData });
    });
  });
}

/* ── Team-Panel rendern ─────────────────────────────────────────────────────── */
function renderTeamPanel(data, socket, mode) {
  const playersEl = document.getElementById(`arena-${mode}-team-players`);
  const actionsEl = document.getElementById(`arena-${mode}-team-actions`);
  if (!playersEl || !actionsEl) return;

  const max = data.max || (mode === "4v4" ? 4 : 2);
  const teamId = mode === "2v2" ? my2v2TeamId : my4v4TeamId;

  playersEl.innerHTML =
    `<div class="arena-team-slots">${data.count}/${max} Spieler</div>` +
    data.players.map(p => `
      <div class="arena-team-player ${p.ready ? "ready" : ""}">
        <span class="arena-team-player-name">${p.name}</span>
        <span class="arena-team-player-level">Lvl ${p.level}</span>
        <span class="arena-team-player-status">${p.ready ? "✅ Bereit" : "⌛ Wartet"}</span>
      </div>
    `).join("") +
    /* Leere Slots anzeigen */
    Array(max - data.count).fill(0).map(() =>
      `<div class="arena-team-player" style="opacity:0.3;">
        <span class="arena-team-player-name">— Wartet auf Spieler —</span>
      </div>`
    ).join("");

  if (data.count < max) {
    actionsEl.innerHTML = `<div class="arena-waiting-partner">Warte auf ${max - data.count} weiteren Spieler…</div>`;
  } else {
    const myEntry  = data.players.find(p => p.name === myArenaData?.name);
    const iAmReady = myEntry?.ready;
    actionsEl.innerHTML = iAmReady
      ? `<button class="arena-btn-ready active" disabled>✅ Du bist bereit</button>`
      : `<button class="arena-btn-ready" id="arena-${mode}-ready-btn">⚔️ Bereit</button>`;

    if (!iAmReady) {
      document.getElementById(`arena-${mode}-ready-btn`)?.addEventListener("click", () => {
        socket.emit(`${mode}_player_ready`, { teamId });
      });
    }
  }
}

/* ── Team verlassen ─────────────────────────────────────────────────────────── */
function leaveTeam(mode) {
  const socket = getSocket();
  if (socket) {
    socket.emit(`leave_${mode}_team`);
    socket.off(`${mode}_lobbies`);
    socket.off(`${mode}_team_joined`);
    socket.off(`${mode}_team_update`);
    socket.off(`${mode}_partner_left`);
    socket.off(`${mode}_searching`);
    socket.off(`match_found_${mode}`);
    socket.off(`${mode}_error`);
  }
}

/* ── Fehleranzeige ──────────────────────────────────────────────────────────── */
function showModeError(mode, msg) {
  const el = document.getElementById(`arena-${mode}-error`);
  if (!el) return;
  el.textContent   = "❌ " + msg;
  el.style.display = "block";
  setTimeout(() => { el.style.display = "none"; }, 4000);
}

function hideModeError(mode) {
  const el = document.getElementById(`arena-${mode}-error`);
  if (el) el.style.display = "none";
}

/* ── 1v1 ────────────────────────────────────────────────────────────────────── */
async function handle1v1Click(card) {
  const socket = getSocket();
  if (!socket) { showArenaError("Keine Verbindung zum Server."); return; }
  if (card.classList.contains("searching")) return;

  let me;
  try {
    const res = await fetch("/arena/me");
    if (!res.ok) throw new Error("Status " + res.status);
    me = await res.json();
  } catch (err) {
    showArenaError("Spielerdaten konnten nicht geladen werden.");
    return;
  }

  setCardSearching(card, true);
  showQueueStatus(me.level);
  socket.off("match_found");
  socket.off("queue_status");

  socket.on("queue_status", data => {
    if (data.status === "waiting")     showQueueStatus(me.level, data.poolSize);
    else if (data.status === "left") { setCardSearching(card, false); hideQueueStatus(); }
  });

  socket.once("match_found", data => {
    socket.off("queue_status");
    setCardSearching(card, false);
    hideQueueStatus();
    showMatchFoundOverlay(me.name, data.opponent.name, () => {
      openArenaPopup(
        `/arena/1v1?match=${encodeURIComponent(data.matchId)}&slot=${encodeURIComponent(data.mySlot)}`,
        data.opponent.name, data.matchId,
      );
    });
  });

  socket.emit("join_1v1", { id: me.id, name: me.name, level: me.level });
}

function cancelQueue(card) {
  const socket = getSocket();
  if (socket) { socket.emit("leave_1v1"); socket.off("match_found"); socket.off("queue_status"); }
  setCardSearching(card, false);
  hideQueueStatus();
}

/* ── Match-Found Splash ─────────────────────────────────────────────────────── */
function showMatchFoundOverlay(myName, opponentName, onDone) {
  if (document.getElementById("match-found-overlay")) return;
  const overlay = document.createElement("div");
  overlay.id = "match-found-overlay";
  overlay.innerHTML = `
    <div class="mfo-title">⚔️ Match gefunden!</div>
    <div class="mfo-vs">${myName} &nbsp;vs&nbsp; ${opponentName}</div>
    <div class="mfo-bar"><div class="mfo-bar-fill" id="mfBar"></div></div>
  `;
  document.body.appendChild(overlay);
  requestAnimationFrame(() => { const b = document.getElementById("mfBar"); if (b) b.style.width = "100%"; });
  setTimeout(() => { overlay.remove(); onDone(); }, 1600);
}

/* ── Popup öffnen ───────────────────────────────────────────────────────────── */
function openArenaPopup(src, opponentName, matchId) {
  document.getElementById("arena-backdrop")?.remove();
  document.getElementById("arena-popup")?.remove();

  const backdrop = document.createElement("div");
  backdrop.id = "arena-backdrop";
  const popup = document.createElement("div");
  popup.id = "arena-popup";
  popup.innerHTML = `
    <div id="arena-popup-titlebar">
      <div class="ap-left"><span class="ap-title">⚔️ Arena · vs ${opponentName}</span></div>
      <span class="ap-url">${matchId || src}</span>
    </div>
    <iframe src="${src}" allowfullscreen></iframe>
  `;
  document.body.appendChild(backdrop);
  document.body.appendChild(popup);
}

/* ── UI Hilfsfunktionen ─────────────────────────────────────────────────────── */
function setCardSearching(card, searching) {
  const label = card.querySelector(".arena-mode-label");
  const desc  = card.querySelector(".arena-mode-desc");
  if (searching) {
    card.classList.add("searching");
    label.textContent = "⏳ Suche…";
    desc.textContent  = "Warte auf passenden Gegner…";
  } else {
    card.classList.remove("searching");
    label.textContent = "1v1";
    desc.textContent  = "Einzelkampf – Beweis deine Stärke im Duell";
  }
}

function showQueueStatus(myLevel, poolSize) {
  const box = document.getElementById("arena-queue-status");
  if (!box) return;
  const pool = poolSize ? ` · ${poolSize} Spieler im Pool` : "";
  box.style.display = "block";
  box.innerHTML = `
    ⏳ Suche Gegner (Level ${Math.max(1, myLevel-5)}–${myLevel+5})${pool}
    <br><span class="qs-cancel" id="qs-cancel-btn">Suche abbrechen</span>
  `;
  document.getElementById("qs-cancel-btn")?.addEventListener("click", () => {
    const card = document.querySelector(".arena-mode-card[data-mode='1v1']");
    if (card) cancelQueue(card);
  });
}

function hideQueueStatus() {
  const box = document.getElementById("arena-queue-status");
  if (box) box.style.display = "none";
}

function showArenaError(msg) {
  const box = document.getElementById("arena-queue-status");
  if (!box) return;
  box.style.display = "block"; box.style.animation = "none";
  box.style.borderColor = "rgba(231,76,60,0.5)"; box.style.color = "#e74c3c";
  box.textContent = "❌ " + msg;
  setTimeout(() => {
    box.style.display = "none"; box.style.animation = "";
    box.style.borderColor = ""; box.style.color = "";
  }, 3000);
}