diff --git a/public/admin.css b/public/admin.css
index a80738b..51149cf 100644
--- a/public/admin.css
+++ b/public/admin.css
@@ -1328,6 +1328,16 @@ label { display: grid; gap: 6px; color: var(--muted); font-size: 13px; }
   padding: 0;
   accent-color: var(--brand);
 }
+.seconds-field {
+  display: grid;
+  grid-template-columns: minmax(0, 1fr) auto;
+  gap: 7px;
+  align-items: center;
+}
+.seconds-field span {
+  color: var(--muted);
+  font-size: 12px;
+}
 pre {
   white-space: pre-wrap;
   overflow: auto;
diff --git a/public/admin.html b/public/admin.html
index 74f9edd..4851305 100644
--- a/public/admin.html
+++ b/public/admin.html
@@ -181,6 +181,20 @@
           </section>
           <section class="settings-tab-panel" data-settings-panel="admin">
             <div class="admin-preferences">
+              <fieldset class="effect-settings presence-settings">
+                <legend>Signalizace navstevniku</legend>
+                <p class="ai-help">Zelena znamena aktivni. Po necinosti se prepne na oranzovou a po dalsim limitu na sedou.</p>
+                <div class="settings-top-row">
+                  <label>Zelena do
+                    <span class="seconds-field"><input id="presenceActiveSeconds" type="number" min="10" max="3600" step="5"><span>s</span></span>
+                  </label>
+                  <label>Seda po
+                    <span class="seconds-field"><input id="presenceOfflineSeconds" type="number" min="20" max="7200" step="5"><span>s</span></span>
+                  </label>
+                </div>
+                <small id="presenceStatus" class="full-row">Oranzova je cas mezi zelenou a sedou.</small>
+                <button id="savePresenceSettings" class="full-row" type="button">Ulozit signalizaci</button>
+              </fieldset>
               <fieldset class="effect-settings sound-settings">
                 <legend>BO zvuk</legend>
                 <label class="setting-switch full-row">Zvuk notifikaci <input id="adminSoundToggleSettings" type="checkbox"></label>
diff --git a/public/admin.js b/public/admin.js
index ee7c079..80a8904 100644
--- a/public/admin.js
+++ b/public/admin.js
@@ -71,6 +71,9 @@ $("#logoutButton").addEventListener("click", async () => {
 
 $("#settingsButton").addEventListener("click", () => $("#settingsPanel").classList.toggle("hidden"));
 $("#closeSettingsButton").addEventListener("click", () => $("#settingsPanel").classList.add("hidden"));
+$("#presenceActiveSeconds").addEventListener("input", markPresenceSettingsDirty);
+$("#presenceOfflineSeconds").addEventListener("input", markPresenceSettingsDirty);
+$("#savePresenceSettings").addEventListener("click", savePresenceSettings);
 $("#adminSoundToggle").addEventListener("click", () => {
   setAdminSoundMuted(!state.soundMuted);
 });
@@ -522,6 +525,7 @@ function renderSite() {
     ? `Klic ulozeny (${s.translations.openaiApiKeyMasked || "sk-..."})`
     : "Klic neni ulozeny. Bez nej AI preklady nepobezi.";
   renderModelOptions(s.translations?.model || "gpt-5-mini");
+  renderPresenceSettings(s.adminPresence || {});
   renderTelegramSettings(s.telegram || {});
 }
 
@@ -757,6 +761,52 @@ function setOpenAiStatus(message) {
   $("#openaiApiKeyStatus").textContent = message;
 }
 
+function renderPresenceSettings(settings) {
+  const normalized = normalizePresenceSettings(settings);
+  $("#presenceActiveSeconds").value = normalized.activeSeconds;
+  $("#presenceOfflineSeconds").value = normalized.offlineSeconds;
+  setPresenceStatus(`Oranzova: ${normalized.activeSeconds}-${normalized.offlineSeconds} s necinosti.`);
+}
+
+function markPresenceSettingsDirty() {
+  const normalized = normalizePresenceSettings({
+    activeSeconds: $("#presenceActiveSeconds").value,
+    offlineSeconds: $("#presenceOfflineSeconds").value
+  });
+  setPresenceStatus(`Neulozeno. Oranzova bude ${normalized.activeSeconds}-${normalized.offlineSeconds} s.`);
+}
+
+async function savePresenceSettings() {
+  if (!state.site) return;
+  const normalized = normalizePresenceSettings({
+    activeSeconds: $("#presenceActiveSeconds").value,
+    offlineSeconds: $("#presenceOfflineSeconds").value
+  });
+  setPresenceStatus("Ukladam signalizaci...");
+  const settings = structuredClone(state.site.settings);
+  settings.adminPresence = normalized;
+  await saveSite({ settings, isOnline: state.site.isOnline });
+  renderPresenceSettings(state.site.settings.adminPresence || normalized);
+  await Promise.all([loadConversations(), loadVisitors()]);
+  setPresenceStatus(`Ulozeno. Oranzova: ${normalized.activeSeconds}-${normalized.offlineSeconds} s.`);
+}
+
+function normalizePresenceSettings(value = {}) {
+  const activeSeconds = clampNumber(value.activeSeconds, 10, 3600, 30);
+  const offlineSeconds = Math.max(clampNumber(value.offlineSeconds, 20, 7200, 120), activeSeconds + 10);
+  return { activeSeconds, offlineSeconds };
+}
+
+function clampNumber(value, min, max, fallback) {
+  const number = Number(value);
+  if (!Number.isFinite(number)) return fallback;
+  return Math.min(max, Math.max(min, Math.round(number)));
+}
+
+function setPresenceStatus(message) {
+  $("#presenceStatus").textContent = message;
+}
+
 function renderTelegramSettings(settings) {
   $("#telegramEnabled").checked = Boolean(settings.enabled);
   $("#telegramOperatorName").value = settings.operatorName || "Alex";
diff --git a/server.js b/server.js
index 45844fd..091fea2 100644
--- a/server.js
+++ b/server.js
@@ -24,8 +24,6 @@ const TELEGRAM_WEBHOOK_SECRET = process.env.TELEGRAM_WEBHOOK_SECRET || "";
 const ALLOWED_IMAGE_TYPES = new Set(["image/jpeg", "image/png", "image/webp", "image/gif", "image/avif"]);
 const ALLOWED_IMAGE_EXTENSIONS = new Set([".jpg", ".jpeg", ".png", ".webp", ".gif", ".avif"]);
 const MAX_ATTACHMENT_BYTES = 3_000_000;
-const ACTIVE_VISITOR_SECONDS = 90;
-const PRESENT_VISITOR_SECONDS = 300;
 const WIDGET_COPY_FIELDS = ["title", "intro", "offlineIntro", "placeholder", "sendLabel", "dropzoneLabel", "onlineLabel", "offlineLabel", "newReplyLabel", "typingLabel", "infoTitle", "infoText", "closeLabel", "operatorReplyLabel"];
 const EUROPEAN_WIDGET_LANGUAGES = new Set([
   "sq", "be", "bs", "bg", "ca", "hr", "cs", "da", "nl", "en", "et", "fi", "fr", "de", "el",
@@ -362,6 +360,10 @@ function defaultSettings() {
       chatId: TELEGRAM_CHAT_ID,
       webhookSecret: TELEGRAM_WEBHOOK_SECRET || id("tgsec"),
       operatorName: "Alex"
+    },
+    adminPresence: {
+      activeSeconds: 30,
+      offlineSeconds: 120
     }
   };
 }
@@ -480,6 +482,7 @@ function adminBootstrap(res) {
 }
 
 function adminConversations(res) {
+  const presence = adminPresenceSettings();
   const rows = db.prepare(`
     SELECT c.*, s.site_key, vp.display_name AS visitor_display_name,
       (SELECT body FROM messages WHERE conversation_id = c.id ORDER BY id DESC LIMIT 1) AS last_body,
@@ -495,12 +498,12 @@ function adminConversations(res) {
         SELECT 1 FROM visitor_sessions vs
         WHERE vs.site_id = c.site_id
           AND vs.visitor_token = c.visitor_token
-          AND datetime(vs.last_seen_at) >= datetime('now', '-${PRESENT_VISITOR_SECONDS} seconds')
+          AND datetime(COALESCE(vs.last_activity_at, vs.last_seen_at)) >= datetime('now', '-${presence.offlineSeconds} seconds')
       ) AS visitor_online,
       COALESCE((
         SELECT CASE
-          WHEN datetime(vs.last_seen_at) < datetime('now', '-${PRESENT_VISITOR_SECONDS} seconds') THEN 'offline'
-          WHEN datetime(vs.last_activity_at) >= datetime('now', '-${ACTIVE_VISITOR_SECONDS} seconds') THEN 'active'
+          WHEN datetime(COALESCE(vs.last_activity_at, vs.last_seen_at)) < datetime('now', '-${presence.offlineSeconds} seconds') THEN 'offline'
+          WHEN datetime(vs.last_activity_at) >= datetime('now', '-${presence.activeSeconds} seconds') THEN 'active'
           ELSE 'idle'
         END
         FROM visitor_sessions vs
@@ -1472,9 +1475,28 @@ function mergeSiteSettings(currentSettings, incomingSettings) {
   delete settings.telegram.hasBotToken;
   delete settings.telegram.botTokenMasked;
   delete settings.telegram.webhookUrl;
+  settings.adminPresence = normalizeAdminPresenceSettings(settings.adminPresence || currentSettings.adminPresence || {});
   return settings;
 }
 
+function normalizeAdminPresenceSettings(value = {}) {
+  const activeSeconds = clampNumber(value.activeSeconds, 10, 3600, 30);
+  const offlineSeconds = Math.max(clampNumber(value.offlineSeconds, 20, 7200, 120), activeSeconds + 10);
+  return { activeSeconds, offlineSeconds };
+}
+
+function adminPresenceSettings() {
+  const site = getDefaultSite();
+  const settings = parseJson(site.settings_json, defaultSettings());
+  return normalizeAdminPresenceSettings(settings.adminPresence || {});
+}
+
+function clampNumber(value, min, max, fallback) {
+  const number = Number(value);
+  if (!Number.isFinite(number)) return fallback;
+  return Math.min(max, Math.max(min, Math.round(number)));
+}
+
 function normalizeWidgetLanguageSettings(value) {
   const defaults = defaultSettings().widgetLanguage;
   const settings = { ...defaults, ...(value || {}) };
@@ -1795,6 +1817,7 @@ function updateVisitorContext(conversationId, body) {
 }
 
 function currentVisitors() {
+  const presence = adminPresenceSettings();
   const rows = db.prepare(`
     SELECT vs.*, s.site_key, vp.display_name AS visitor_display_name,
       (SELECT c.public_id FROM conversations c WHERE c.site_id = vs.site_id AND c.visitor_token = vs.visitor_token ORDER BY datetime(c.last_message_at) DESC, c.id DESC LIMIT 1) AS last_conversation_id,
@@ -1802,19 +1825,19 @@ function currentVisitors() {
     FROM visitor_sessions vs
     JOIN sites s ON s.id = vs.site_id
     LEFT JOIN visitor_profiles vp ON vp.site_id = vs.site_id AND vp.visitor_token = vs.visitor_token
-    WHERE datetime(vs.last_seen_at) >= datetime('now', '-${PRESENT_VISITOR_SECONDS} seconds')
+    WHERE datetime(vs.last_seen_at) >= datetime('now', '-${presence.offlineSeconds} seconds')
     ORDER BY datetime(vs.last_seen_at) DESC
     LIMIT 100
   `).all();
-  return rows.map(formatVisitorSession);
+  return rows.map((row) => formatVisitorSession(row, presence));
 }
 
-function formatVisitorSession(row) {
+function formatVisitorSession(row, thresholds = adminPresenceSettings()) {
   const history = parseJson(row.browsing_history_json, []);
   const device = parseJson(row.device_json, {});
   const bot = botInfo(device.userAgent);
   const countryCode = row.country_code || countryFromTimezone(row.timezone) || countryFromLanguage(row.language);
-  const presence = visitorPresence(row);
+  const presence = visitorPresence(row, thresholds);
   return {
     id: row.visitor_token,
     initials: visitorInitials(row.visitor_token),
@@ -1843,11 +1866,12 @@ function formatVisitorSession(row) {
   };
 }
 
-function visitorPresence(row) {
+function visitorPresence(row, thresholds = adminPresenceSettings()) {
   const lastSeen = parseTimestampMs(row.last_seen_at);
-  if (!Number.isFinite(lastSeen) || Date.now() - lastSeen > PRESENT_VISITOR_SECONDS * 1000) return "offline";
   const lastActivity = parseTimestampMs(row.last_activity_at || row.last_seen_at);
-  return Number.isFinite(lastActivity) && Date.now() - lastActivity <= ACTIVE_VISITOR_SECONDS * 1000 ? "active" : "idle";
+  if (!Number.isFinite(lastSeen) || Date.now() - lastSeen > thresholds.offlineSeconds * 1000) return "offline";
+  if (!Number.isFinite(lastActivity) || Date.now() - lastActivity > thresholds.offlineSeconds * 1000) return "offline";
+  return Number.isFinite(lastActivity) && Date.now() - lastActivity <= thresholds.activeSeconds * 1000 ? "active" : "idle";
 }
 
 function conversationDetails(conversation) {
@@ -1981,6 +2005,7 @@ function getSiteById(id) {
 }
 
 function findConversation(publicId) {
+  const presence = adminPresenceSettings();
   return db.prepare(`
     SELECT c.*, s.site_key, vp.display_name AS visitor_display_name,
       (SELECT body FROM messages WHERE conversation_id = c.id ORDER BY id DESC LIMIT 1) AS last_body,
@@ -1996,12 +2021,12 @@ function findConversation(publicId) {
         SELECT 1 FROM visitor_sessions vs
         WHERE vs.site_id = c.site_id
           AND vs.visitor_token = c.visitor_token
-          AND datetime(vs.last_seen_at) >= datetime('now', '-${PRESENT_VISITOR_SECONDS} seconds')
+          AND datetime(COALESCE(vs.last_activity_at, vs.last_seen_at)) >= datetime('now', '-${presence.offlineSeconds} seconds')
       ) AS visitor_online,
       COALESCE((
         SELECT CASE
-          WHEN datetime(vs.last_seen_at) < datetime('now', '-${PRESENT_VISITOR_SECONDS} seconds') THEN 'offline'
-          WHEN datetime(vs.last_activity_at) >= datetime('now', '-${ACTIVE_VISITOR_SECONDS} seconds') THEN 'active'
+          WHEN datetime(COALESCE(vs.last_activity_at, vs.last_seen_at)) < datetime('now', '-${presence.offlineSeconds} seconds') THEN 'offline'
+          WHEN datetime(vs.last_activity_at) >= datetime('now', '-${presence.activeSeconds} seconds') THEN 'active'
           ELSE 'idle'
         END
         FROM visitor_sessions vs