diff --git a/lib/towerops_web/components/consent_prompt.ex b/lib/towerops_web/components/consent_prompt.ex
index 6b622e86..0fb05279 100644
--- a/lib/towerops_web/components/consent_prompt.ex
+++ b/lib/towerops_web/components/consent_prompt.ex
@@ -25,7 +25,7 @@ defmodule ToweropsWeb.Components.ConsentPrompt do
       >
         <div class="flex min-h-screen items-center justify-center p-4">
           <!-- Backdrop -->
-          <div class="fixed inset-0 bg-gray-500 bg-opacity-75 transition-opacity"></div>
+          <div class="fixed inset-0 bg-gray-500 dark:bg-gray-900 bg-opacity-75 dark:bg-opacity-80 transition-opacity"></div>
           
     <!-- Modal panel -->
           <div class="relative transform overflow-hidden rounded-lg bg-white dark:bg-gray-800 px-4 pb-4 pt-5 text-left shadow-xl transition-all sm:my-8 sm:w-full sm:max-w-lg sm:p-6">
diff --git a/lib/towerops_web/components/layouts.ex b/lib/towerops_web/components/layouts.ex
index 95363d02..34b4a6b9 100644
--- a/lib/towerops_web/components/layouts.ex
+++ b/lib/towerops_web/components/layouts.ex
@@ -154,7 +154,7 @@ defmodule ToweropsWeb.Layouts do
               <.link
                 href={~p"/admin/impersonate"}
                 method="delete"
-                class="px-3 py-1 bg-white text-yellow-900 hover:bg-yellow-50 rounded font-medium text-sm"
+                class="px-3 py-1 bg-white dark:bg-gray-900 text-yellow-900 dark:text-yellow-200 hover:bg-yellow-50 dark:hover:bg-gray-800 rounded font-medium text-sm"
               >
                 Exit
               </.link>
diff --git a/lib/towerops_web/components/marketing_layouts.ex b/lib/towerops_web/components/marketing_layouts.ex
index ae28d68e..1a30a03b 100644
--- a/lib/towerops_web/components/marketing_layouts.ex
+++ b/lib/towerops_web/components/marketing_layouts.ex
@@ -30,7 +30,7 @@ defmodule ToweropsWeb.MarketingLayouts do
     assigns = Map.put(assigns, :requires_cookie_consent, requires_cookie_consent)
 
     ~H"""
-    <div class="bg-white">
+    <div class="bg-white dark:bg-gray-900">
       <header class="py-10">
         <div class="mx-auto max-w-7xl px-4 sm:px-6 lg:px-8">
           <nav class="relative z-50 flex justify-between">
diff --git a/lib/towerops_web/controllers/error_html/404.html.heex b/lib/towerops_web/controllers/error_html/404.html.heex
index 69233a7a..1067aa9d 100644
--- a/lib/towerops_web/controllers/error_html/404.html.heex
+++ b/lib/towerops_web/controllers/error_html/404.html.heex
@@ -6,7 +6,7 @@
     <title>{t("404 - Page Not Found")}</title>
     <link phx-track-static rel="stylesheet" href="/assets/css/app.css" />
   </head>
-  <body class="bg-white">
+  <body class="bg-white dark:bg-gray-900">
     <div class="min-h-screen flex flex-col items-center justify-center px-4 sm:px-6 lg:px-8">
       <div class="max-w-2xl w-full text-center">
         <!-- Logo -->
diff --git a/lib/towerops_web/controllers/error_html/500.html.heex b/lib/towerops_web/controllers/error_html/500.html.heex
index cf059885..cc0d24be 100644
--- a/lib/towerops_web/controllers/error_html/500.html.heex
+++ b/lib/towerops_web/controllers/error_html/500.html.heex
@@ -6,7 +6,7 @@
     <title>{t("500 - Server Error")}</title>
     <link phx-track-static rel="stylesheet" href="/assets/css/app.css" />
   </head>
-  <body class="bg-white">
+  <body class="bg-white dark:bg-gray-900">
     <div class="min-h-screen flex flex-col items-center justify-center px-4 sm:px-6 lg:px-8">
       <div class="max-w-2xl w-full text-center">
         <!-- Logo -->
diff --git a/lib/towerops_web/controllers/page_html/home.html.heex b/lib/towerops_web/controllers/page_html/home.html.heex
index 3869647c..c66e4cb3 100644
--- a/lib/towerops_web/controllers/page_html/home.html.heex
+++ b/lib/towerops_web/controllers/page_html/home.html.heex
@@ -248,7 +248,7 @@
             Your dashboard lights up with subscriber impact, revenue at risk, device health,
             and site status. Help desk gets subscriber trace. NOC gets alert triage. Everyone wins.
           </p>
-          <div class="mt-6 rounded-lg border-2 border-blue-200 bg-white p-4">
+          <div class="mt-6 rounded-lg border-2 border-blue-200 dark:border-blue-800 bg-white dark:bg-white/5 p-4">
             <div class="flex items-center gap-2">
               <.icon name="hero-chart-bar" class="h-5 w-5 text-blue-600" />
               <span class="text-sm font-medium text-slate-900">Impact Dashboard</span>
@@ -317,7 +317,7 @@
         </p>
       </div>
       <div class="mt-16 mx-auto max-w-xl">
-        <div class="rounded-2xl bg-white p-8 shadow-lg ring-2 ring-blue-600 text-center">
+        <div class="rounded-2xl bg-white dark:bg-gray-900 p-8 shadow-lg dark:shadow-gray-900/50 ring-2 ring-blue-600 text-center">
           <div class="mt-2">
             <span class="text-5xl font-bold text-slate-900">$3</span>
             <span class="text-lg text-slate-500">/device/month</span>
@@ -436,7 +436,7 @@
         </p>
         <.link
           navigate={~p"/users/register"}
-          class="group inline-flex items-center justify-center rounded-full py-3 px-6 text-sm font-semibold focus-visible:outline-2 focus-visible:outline-offset-2 mt-10 bg-white text-slate-900 hover:bg-blue-50 active:bg-blue-200 active:text-slate-600 focus-visible:outline-white"
+          class="group inline-flex items-center justify-center rounded-full py-3 px-6 text-sm font-semibold focus-visible:outline-2 focus-visible:outline-offset-2 mt-10 bg-white dark:bg-gray-100 text-slate-900 hover:bg-blue-50 dark:hover:bg-white active:bg-blue-200 active:text-slate-600 focus-visible:outline-white"
         >
           Start monitoring free →
         </.link>
diff --git a/lib/towerops_web/live/alert_live/index.html.heex b/lib/towerops_web/live/alert_live/index.html.heex
index f1efd2d7..88625c29 100644
--- a/lib/towerops_web/live/alert_live/index.html.heex
+++ b/lib/towerops_web/live/alert_live/index.html.heex
@@ -424,7 +424,7 @@
                                   )}
                                 </span>
                                 <%= if alert.acknowledged_by do %>
-                                  <span class="text-gray-500">
+                                  <span class="text-gray-500 dark:text-gray-400">
                                     by {alert.acknowledged_by.email}
                                   </span>
                                 <% end %>
diff --git a/lib/towerops_web/live/check_live/form_component.ex b/lib/towerops_web/live/check_live/form_component.ex
index 9e3e16a9..4f22e081 100644
--- a/lib/towerops_web/live/check_live/form_component.ex
+++ b/lib/towerops_web/live/check_live/form_component.ex
@@ -8,7 +8,7 @@ defmodule ToweropsWeb.CheckLive.FormComponent do
   def render(assigns) do
     ~H"""
     <div class="relative z-50">
-      <div class="fixed inset-0 bg-gray-500 bg-opacity-75 transition-opacity"></div>
+      <div class="fixed inset-0 bg-gray-500 dark:bg-gray-900 bg-opacity-75 dark:bg-opacity-80 transition-opacity"></div>
 
       <div class="fixed inset-0 z-10 overflow-y-auto">
         <div class="flex min-h-full items-end justify-center p-4 text-center sm:items-center sm:p-0">
diff --git a/lib/towerops_web/live/dashboard_live.html.heex b/lib/towerops_web/live/dashboard_live.html.heex
index 18561933..0fa22d60 100644
--- a/lib/towerops_web/live/dashboard_live.html.heex
+++ b/lib/towerops_web/live/dashboard_live.html.heex
@@ -645,7 +645,7 @@
                   "critical" -> "text-red-600 dark:text-red-400"
                   "warning" -> "text-yellow-600 dark:text-yellow-400"
                   "info" -> "text-blue-600 dark:text-blue-400"
-                  _ -> "text-gray-500"
+                  _ -> "text-gray-500 dark:text-gray-400"
                 end
               ]}>
                 {case insight.urgency do
diff --git a/lib/towerops_web/live/device_live/show.html.heex b/lib/towerops_web/live/device_live/show.html.heex
index 97738f1a..d05e2ff1 100644
--- a/lib/towerops_web/live/device_live/show.html.heex
+++ b/lib/towerops_web/live/device_live/show.html.heex
@@ -576,7 +576,7 @@
                   >
                     <div class="absolute inset-0 flex items-center justify-center" data-loading>
                       <div class="flex flex-col items-center gap-2">
-                        <div class="h-8 w-8 animate-spin rounded-full border-2 border-gray-200 border-t-blue-500">
+                        <div class="h-8 w-8 animate-spin rounded-full border-2 border-gray-200 dark:border-gray-700 border-t-blue-500">
                         </div>
                         <span class="text-xs text-gray-400">{t("Loading chart...")}</span>
                       </div>
@@ -612,7 +612,7 @@
                   >
                     <div class="absolute inset-0 flex items-center justify-center" data-loading>
                       <div class="flex flex-col items-center gap-2">
-                        <div class="h-8 w-8 animate-spin rounded-full border-2 border-gray-200 border-t-blue-500">
+                        <div class="h-8 w-8 animate-spin rounded-full border-2 border-gray-200 dark:border-gray-700 border-t-blue-500">
                         </div>
                         <span class="text-xs text-gray-400">{t("Loading chart...")}</span>
                       </div>
diff --git a/lib/towerops_web/live/maintenance_live/form.ex b/lib/towerops_web/live/maintenance_live/form.ex
new file mode 100644
index 00000000..2597882f
--- /dev/null
+++ b/lib/towerops_web/live/maintenance_live/form.ex
@@ -0,0 +1,116 @@
+defmodule ToweropsWeb.MaintenanceLive.Form do
+  use ToweropsWeb, :live_view
+
+  alias Towerops.Maintenance
+  alias Towerops.Maintenance.MaintenanceWindow
+
+  @impl true
+  def mount(_params, _session, socket) do
+    org_id = socket.assigns.current_scope.organization.id
+    sites = Towerops.Sites.list_organization_sites(org_id)
+    devices = Towerops.Devices.list_organization_devices(org_id)
+
+    {:ok,
+     socket
+     |> assign(:sites, sites)
+     |> assign(:devices, devices)
+     |> assign(:timezone, socket.assigns.current_scope.timezone)}
+  end
+
+  @impl true
+  def handle_params(params, _url, socket) do
+    case socket.assigns.live_action do
+      :new ->
+        changeset = MaintenanceWindow.changeset(%MaintenanceWindow{suppress_alerts: true}, %{})
+
+        {:noreply,
+         socket
+         |> assign(:page_title, t("New Maintenance Window"))
+         |> assign(:window, %MaintenanceWindow{suppress_alerts: true, recurring: false})
+         |> assign(:changeset, changeset)
+         |> assign(:scope_type, "org")}
+
+      :edit ->
+        window = Maintenance.get_window!(params["id"])
+
+        scope_type =
+          cond do
+            window.device_id -> "device"
+            window.site_id -> "site"
+            true -> "org"
+          end
+
+        changeset = MaintenanceWindow.changeset(window, %{})
+
+        {:noreply,
+         socket
+         |> assign(:page_title, t("Edit Maintenance Window"))
+         |> assign(:window, window)
+         |> assign(:changeset, changeset)
+         |> assign(:scope_type, scope_type)}
+    end
+  end
+
+  @impl true
+  def handle_event("validate", %{"maintenance_window" => params}, socket) do
+    changeset =
+      socket.assigns.window
+      |> MaintenanceWindow.changeset(params)
+      |> Map.put(:action, :validate)
+
+    {:noreply, assign(socket, :changeset, changeset)}
+  end
+
+  def handle_event("change_scope", %{"scope_type" => scope_type}, socket) do
+    {:noreply, assign(socket, :scope_type, scope_type)}
+  end
+
+  def handle_event("save", %{"maintenance_window" => params}, socket) do
+    scope = socket.assigns.current_scope
+
+    params =
+      params
+      |> Map.put("organization_id", scope.organization.id)
+      |> Map.put("created_by_id", scope.user.id)
+      |> maybe_clear_scope(socket.assigns.scope_type)
+
+    case socket.assigns.live_action do
+      :new -> save_window(socket, :create, params)
+      :edit -> save_window(socket, :update, params)
+    end
+  end
+
+  defp maybe_clear_scope(params, "org"), do: Map.merge(params, %{"site_id" => nil, "device_id" => nil})
+  defp maybe_clear_scope(params, "site"), do: Map.put(params, "device_id", nil)
+  defp maybe_clear_scope(params, _), do: params
+
+  defp format_datetime_local(nil), do: ""
+  defp format_datetime_local(%DateTime{} = dt), do: Calendar.strftime(dt, "%Y-%m-%dT%H:%M")
+  defp format_datetime_local(_), do: ""
+
+  defp save_window(socket, :create, params) do
+    case Maintenance.create_window(params) do
+      {:ok, window} ->
+        {:noreply,
+         socket
+         |> put_flash(:info, t("Maintenance window created"))
+         |> push_navigate(to: ~p"/maintenance/#{window.id}")}
+
+      {:error, changeset} ->
+        {:noreply, assign(socket, :changeset, changeset)}
+    end
+  end
+
+  defp save_window(socket, :update, params) do
+    case Maintenance.update_window(socket.assigns.window, params) do
+      {:ok, window} ->
+        {:noreply,
+         socket
+         |> put_flash(:info, t("Maintenance window updated"))
+         |> push_navigate(to: ~p"/maintenance/#{window.id}")}
+
+      {:error, changeset} ->
+        {:noreply, assign(socket, :changeset, changeset)}
+    end
+  end
+end
diff --git a/lib/towerops_web/live/maintenance_live/form.html.heex b/lib/towerops_web/live/maintenance_live/form.html.heex
new file mode 100644
index 00000000..20f59b3d
--- /dev/null
+++ b/lib/towerops_web/live/maintenance_live/form.html.heex
@@ -0,0 +1,211 @@
+<Layouts.authenticated
+  flash={@flash}
+  current_scope={@current_scope}
+  active_page="maintenance"
+>
+  <div class="mb-6">
+    <.link
+      navigate={~p"/maintenance"}
+      class="inline-flex items-center gap-1 text-sm text-gray-500 hover:text-gray-700 dark:text-gray-400 dark:hover:text-gray-200"
+    >
+      <.icon name="hero-arrow-left" class="h-4 w-4" />
+      {t("Back to Maintenance Windows")}
+    </.link>
+  </div>
+
+  <h1 class="text-xl font-bold text-gray-900 dark:text-white mb-6">{@page_title}</h1>
+
+  <div class="rounded-lg border border-gray-200 dark:border-white/10 bg-white dark:bg-gray-900 p-6">
+    <.form
+      for={@changeset}
+      phx-change="validate"
+      phx-submit="save"
+      id="maintenance-form"
+    >
+      <div class="space-y-6">
+        <%!-- Name --%>
+        <div>
+          <label for="maintenance_window_name" class="block text-sm font-medium text-gray-700 dark:text-gray-300 mb-1">
+            {t("Name")} <span class="text-red-500">*</span>
+          </label>
+          <input
+            type="text"
+            name="maintenance_window[name]"
+            id="maintenance_window_name"
+            value={Ecto.Changeset.get_field(@changeset, :name) || ""}
+            required
+            class="block w-full rounded-lg border border-gray-300 bg-white px-3 py-2 text-sm text-gray-900 placeholder-gray-400 focus:border-blue-500 focus:ring-blue-500 dark:border-white/10 dark:bg-gray-800 dark:text-white dark:placeholder-gray-500"
+            placeholder={t("e.g., Tower firmware upgrade")}
+          />
+          <%= for {msg, _} <- (@changeset.errors[:name] || []) do %><p class="mt-1 text-sm text-red-600 dark:text-red-400">{msg}</p><% end %>
+        </div>
+
+        <%!-- Reason --%>
+        <div>
+          <label for="maintenance_window_reason" class="block text-sm font-medium text-gray-700 dark:text-gray-300 mb-1">
+            {t("Reason")}
+          </label>
+          <textarea
+            name="maintenance_window[reason]"
+            id="maintenance_window_reason"
+            rows="3"
+            class="block w-full rounded-lg border border-gray-300 bg-white px-3 py-2 text-sm text-gray-900 placeholder-gray-400 focus:border-blue-500 focus:ring-blue-500 dark:border-white/10 dark:bg-gray-800 dark:text-white dark:placeholder-gray-500"
+            placeholder={t("Optional description of the maintenance work")}
+          >{Ecto.Changeset.get_field(@changeset, :reason) || ""}</textarea>
+        </div>
+
+        <%!-- Scope --%>
+        <div>
+          <label class="block text-sm font-medium text-gray-700 dark:text-gray-300 mb-2">{t("Scope")}</label>
+          <div class="flex items-center gap-4 mb-3">
+            <%= for {label, value} <- [{t("Org-wide"), "org"}, {t("Site"), "site"}, {t("Device"), "device"}] do %>
+              <label class="inline-flex items-center gap-2 cursor-pointer">
+                <input
+                  type="radio"
+                  name="scope_type"
+                  value={value}
+                  checked={@scope_type == value}
+                  phx-click="change_scope"
+                  phx-value-scope_type={value}
+                  class="text-blue-600 focus:ring-blue-500 dark:bg-gray-800 dark:border-white/10"
+                />
+                <span class="text-sm text-gray-700 dark:text-gray-300">{label}</span>
+              </label>
+            <% end %>
+          </div>
+
+          <%= if @scope_type == "site" do %>
+            <select
+              name="maintenance_window[site_id]"
+              class="block w-full rounded-lg border border-gray-300 bg-white px-3 py-2 text-sm text-gray-900 focus:border-blue-500 focus:ring-blue-500 dark:border-white/10 dark:bg-gray-800 dark:text-white"
+            >
+              <option value="">{t("Select a site...")}</option>
+              <%= for site <- @sites do %>
+                <option value={site.id} selected={Ecto.Changeset.get_field(@changeset, :site_id) == site.id}>
+                  {site.name}
+                </option>
+              <% end %>
+            </select>
+          <% end %>
+
+          <%= if @scope_type == "device" do %>
+            <select
+              name="maintenance_window[device_id]"
+              class="block w-full rounded-lg border border-gray-300 bg-white px-3 py-2 text-sm text-gray-900 focus:border-blue-500 focus:ring-blue-500 dark:border-white/10 dark:bg-gray-800 dark:text-white"
+            >
+              <option value="">{t("Select a device...")}</option>
+              <%= for device <- @devices do %>
+                <option value={device.id} selected={Ecto.Changeset.get_field(@changeset, :device_id) == device.id}>
+                  {device.name}
+                </option>
+              <% end %>
+            </select>
+          <% end %>
+        </div>
+
+        <%!-- Time Range --%>
+        <div class="grid grid-cols-1 sm:grid-cols-2 gap-4">
+          <div>
+            <label for="maintenance_window_starts_at" class="block text-sm font-medium text-gray-700 dark:text-gray-300 mb-1">
+              {t("Starts At")} <span class="text-red-500">*</span>
+            </label>
+            <input
+              type="datetime-local"
+              name="maintenance_window[starts_at]"
+              id="maintenance_window_starts_at"
+              value={format_datetime_local(Ecto.Changeset.get_field(@changeset, :starts_at))}
+              required
+              class="block w-full rounded-lg border border-gray-300 bg-white px-3 py-2 text-sm text-gray-900 focus:border-blue-500 focus:ring-blue-500 dark:border-white/10 dark:bg-gray-800 dark:text-white"
+            />
+            <%= for {msg, _} <- (@changeset.errors[:starts_at] || []) do %><p class="mt-1 text-sm text-red-600 dark:text-red-400">{msg}</p><% end %>
+          </div>
+          <div>
+            <label for="maintenance_window_ends_at" class="block text-sm font-medium text-gray-700 dark:text-gray-300 mb-1">
+              {t("Ends At")} <span class="text-red-500">*</span>
+            </label>
+            <input
+              type="datetime-local"
+              name="maintenance_window[ends_at]"
+              id="maintenance_window_ends_at"
+              value={format_datetime_local(Ecto.Changeset.get_field(@changeset, :ends_at))}
+              required
+              class="block w-full rounded-lg border border-gray-300 bg-white px-3 py-2 text-sm text-gray-900 focus:border-blue-500 focus:ring-blue-500 dark:border-white/10 dark:bg-gray-800 dark:text-white"
+            />
+            <%= for {msg, _} <- (@changeset.errors[:ends_at] || []) do %><p class="mt-1 text-sm text-red-600 dark:text-red-400">{msg}</p><% end %>
+          </div>
+        </div>
+
+        <%!-- Suppress Alerts --%>
+        <div>
+          <label class="inline-flex items-center gap-2 cursor-pointer">
+            <input
+              type="hidden"
+              name="maintenance_window[suppress_alerts]"
+              value="false"
+            />
+            <input
+              type="checkbox"
+              name="maintenance_window[suppress_alerts]"
+              value="true"
+              checked={Ecto.Changeset.get_field(@changeset, :suppress_alerts) == true}
+              class="rounded border-gray-300 text-blue-600 focus:ring-blue-500 dark:bg-gray-800 dark:border-white/10"
+            />
+            <span class="text-sm text-gray-700 dark:text-gray-300">{t("Suppress alerts during this window")}</span>
+          </label>
+        </div>
+
+        <%!-- Recurring --%>
+        <div>
+          <label class="inline-flex items-center gap-2 cursor-pointer">
+            <input
+              type="hidden"
+              name="maintenance_window[recurring]"
+              value="false"
+            />
+            <input
+              type="checkbox"
+              name="maintenance_window[recurring]"
+              value="true"
+              checked={Ecto.Changeset.get_field(@changeset, :recurring) == true}
+              class="rounded border-gray-300 text-blue-600 focus:ring-blue-500 dark:bg-gray-800 dark:border-white/10"
+            />
+            <span class="text-sm text-gray-700 dark:text-gray-300">{t("Recurring")}</span>
+          </label>
+        </div>
+
+        <%!-- Recurrence Rule (shown when recurring) --%>
+        <%= if Ecto.Changeset.get_field(@changeset, :recurring) == true do %>
+          <div>
+            <label for="maintenance_window_recurrence_rule" class="block text-sm font-medium text-gray-700 dark:text-gray-300 mb-1">
+              {t("Recurrence Rule")}
+            </label>
+            <input
+              type="text"
+              name="maintenance_window[recurrence_rule]"
+              id="maintenance_window_recurrence_rule"
+              value={Ecto.Changeset.get_field(@changeset, :recurrence_rule) || ""}
+              class="block w-full rounded-lg border border-gray-300 bg-white px-3 py-2 text-sm text-gray-900 placeholder-gray-400 focus:border-blue-500 focus:ring-blue-500 dark:border-white/10 dark:bg-gray-800 dark:text-white dark:placeholder-gray-500"
+              placeholder={t("e.g., FREQ=WEEKLY;BYDAY=SU")}
+            />
+          </div>
+        <% end %>
+
+        <%!-- Submit --%>
+        <div class="flex items-center justify-end gap-3 pt-4 border-t border-gray-200 dark:border-white/10">
+          <.link
+            navigate={~p"/maintenance"}
+            class="rounded-lg px-4 py-2 text-sm font-medium text-gray-700 hover:bg-gray-100 dark:text-gray-300 dark:hover:bg-gray-800 transition-colors"
+          >
+            {t("Cancel")}
+          </.link>
+          <button
+            type="submit"
+            class="rounded-lg bg-blue-600 px-4 py-2 text-sm font-semibold text-white hover:bg-blue-500 transition-colors"
+          >
+            {t("Save")}
+          </button>
+        </div>
+      </div>
+    </.form>
+  </div>
+</Layouts.authenticated>
diff --git a/lib/towerops_web/live/maintenance_live/index.ex b/lib/towerops_web/live/maintenance_live/index.ex
new file mode 100644
index 00000000..8c31a17b
--- /dev/null
+++ b/lib/towerops_web/live/maintenance_live/index.ex
@@ -0,0 +1,66 @@
+defmodule ToweropsWeb.MaintenanceLive.Index do
+  use ToweropsWeb, :live_view
+
+  alias Towerops.Maintenance
+
+  @impl true
+  def mount(_params, _session, socket) do
+    organization = socket.assigns.current_scope.organization
+
+    {:ok,
+     socket
+     |> assign(:page_title, t("Maintenance Windows"))
+     |> assign(:filter, "all")
+     |> assign(:timezone, socket.assigns.current_scope.timezone)
+     |> load_windows(organization.id)}
+  end
+
+  @impl true
+  def handle_params(params, _url, socket) do
+    filter = Map.get(params, "filter", "all")
+
+    {:noreply,
+     socket
+     |> assign(:filter, filter)
+     |> load_windows(socket.assigns.current_scope.organization.id)}
+  end
+
+  defp load_windows(socket, org_id) do
+    filter_atom =
+      case socket.assigns.filter do
+        "active" -> :active
+        "upcoming" -> :upcoming
+        "past" -> :past
+        _ -> nil
+      end
+
+    opts = if filter_atom, do: [filter: filter_atom], else: []
+    windows = Maintenance.list_windows(org_id, opts)
+    assign(socket, :windows, windows)
+  end
+
+  defp status_for(window) do
+    now = DateTime.utc_now()
+
+    cond do
+      DateTime.compare(window.starts_at, now) == :gt -> :upcoming
+      DateTime.compare(window.ends_at, now) == :lt -> :past
+      true -> :active
+    end
+  end
+
+  defp scope_label(window) do
+    cond do
+      window.device -> "Device: #{window.device.name}"
+      window.site -> "Site: #{window.site.name}"
+      true -> "Org-wide"
+    end
+  end
+
+  defp format_datetime(dt, timezone) do
+    case DateTime.shift_zone(dt, timezone) do
+      {:ok, local} -> Calendar.strftime(local, "%b %d, %Y %I:%M %p")
+      _ -> Calendar.strftime(dt, "%b %d, %Y %I:%M %p UTC")
+    end
+  end
+end
diff --git a/lib/towerops_web/live/maintenance_live/index.html.heex b/lib/towerops_web/live/maintenance_live/index.html.heex
new file mode 100644
index 00000000..34331381
--- /dev/null
+++ b/lib/towerops_web/live/maintenance_live/index.html.heex
@@ -0,0 +1,118 @@
+<Layouts.authenticated
+  flash={@flash}
+  current_scope={@current_scope}
+  active_page="maintenance"
+>
+  <div class="flex items-center justify-between mb-6">
+    <h1 class="text-xl font-bold text-gray-900 dark:text-white">{t("Maintenance Windows")}</h1>
+    <.link
+      navigate={~p"/maintenance/new"}
+      class="inline-flex items-center gap-2 rounded-lg bg-blue-600 px-4 py-2 text-sm font-semibold text-white hover:bg-blue-500 transition-colors"
+    >
+      <.icon name="hero-plus" class="h-4 w-4" />
+      {t("New Window")}
+    </.link>
+  </div>
+
+  <%!-- Filter tabs --%>
+  <div class="flex items-center gap-2 mb-4 flex-wrap">
+    <.link
+      patch={~p"/maintenance?filter=all"}
+      class={[
+        "inline-flex items-center px-3 py-1.5 rounded-full text-xs font-medium transition-colors",
+        @filter == "all" && "bg-gray-900 text-white dark:bg-white dark:text-gray-900",
+        @filter != "all" && "bg-gray-100 text-gray-700 hover:bg-gray-200 dark:bg-gray-800 dark:text-gray-300 dark:hover:bg-gray-700"
+      ]}
+    >
+      {t("All")}
+    </.link>
+    <.link
+      patch={~p"/maintenance?filter=active"}
+      class={[
+        "inline-flex items-center px-3 py-1.5 rounded-full text-xs font-medium transition-colors",
+        @filter == "active" && "bg-gray-900 text-white dark:bg-white dark:text-gray-900",
+        @filter != "active" && "bg-gray-100 text-gray-700 hover:bg-gray-200 dark:bg-gray-800 dark:text-gray-300 dark:hover:bg-gray-700"
+      ]}
+    >
+      {t("Active")}
+    </.link>
+    <.link
+      patch={~p"/maintenance?filter=upcoming"}
+      class={[
+        "inline-flex items-center px-3 py-1.5 rounded-full text-xs font-medium transition-colors",
+        @filter == "upcoming" && "bg-gray-900 text-white dark:bg-white dark:text-gray-900",
+        @filter != "upcoming" && "bg-gray-100 text-gray-700 hover:bg-gray-200 dark:bg-gray-800 dark:text-gray-300 dark:hover:bg-gray-700"
+      ]}
+    >
+      {t("Upcoming")}
+    </.link>
+    <.link
+      patch={~p"/maintenance?filter=past"}
+      class={[
+        "inline-flex items-center px-3 py-1.5 rounded-full text-xs font-medium transition-colors",
+        @filter == "past" && "bg-gray-900 text-white dark:bg-white dark:text-gray-900",
+        @filter != "past" && "bg-gray-100 text-gray-700 hover:bg-gray-200 dark:bg-gray-800 dark:text-gray-300 dark:hover:bg-gray-700"
+      ]}
+    >
+      {t("Past")}
+    </.link>
+  </div>
+
+  <%= if Enum.empty?(@windows) do %>
+    <div class="flex items-center justify-center py-16">
+      <div class="text-center">
+        <.icon name="hero-wrench-screwdriver" class="h-12 w-12 text-gray-300 dark:text-gray-600 mx-auto mb-4" />
+        <h3 class="text-lg font-semibold text-gray-700 dark:text-gray-300">{t("No maintenance windows")}</h3>
+        <p class="mt-2 text-sm text-gray-500 dark:text-gray-400">
+          {t("Schedule maintenance to suppress alerts during planned work.")}
+        </p>
+      </div>
+    </div>
+  <% else %>
+    <div class="overflow-hidden rounded-lg border border-gray-200 dark:border-white/10">
+      <table class="min-w-full divide-y divide-gray-200 dark:divide-white/10">
+        <thead class="bg-gray-50 dark:bg-gray-800/50">
+          <tr>
+            <th class="px-4 py-3 text-left text-xs font-semibold uppercase tracking-wider text-gray-500 dark:text-gray-400">{t("Name")}</th>
+            <th class="px-4 py-3 text-left text-xs font-semibold uppercase tracking-wider text-gray-500 dark:text-gray-400">{t("Scope")}</th>
+            <th class="px-4 py-3 text-left text-xs font-semibold uppercase tracking-wider text-gray-500 dark:text-gray-400">{t("Time Range")}</th>
+            <th class="px-4 py-3 text-left text-xs font-semibold uppercase tracking-wider text-gray-500 dark:text-gray-400">{t("Status")}</th>
+            <th class="px-4 py-3 text-left text-xs font-semibold uppercase tracking-wider text-gray-500 dark:text-gray-400">{t("Created By")}</th>
+          </tr>
+        </thead>
+        <tbody class="divide-y divide-gray-100 dark:divide-white/5 bg-white dark:bg-gray-900">
+          <%= for window <- @windows do %>
+            <tr
+              class="hover:bg-gray-50 dark:hover:bg-gray-800/30 transition-colors cursor-pointer"
+              phx-click={JS.navigate(~p"/maintenance/#{window.id}")}
+            >
+              <td class="px-4 py-3 text-sm font-medium text-gray-900 dark:text-white">
+                {window.name}
+              </td>
+              <td class="px-4 py-3 text-sm text-gray-600 dark:text-gray-400">
+                {scope_label(window)}
+              </td>
+              <td class="px-4 py-3 text-sm text-gray-600 dark:text-gray-400 whitespace-nowrap">
+                {format_datetime(window.starts_at, @timezone)} — {format_datetime(window.ends_at, @timezone)}
+              </td>
+              <td class="px-4 py-3">
+                <% status = status_for(window) %>
+                <span class={[
+                  "inline-flex items-center px-2 py-0.5 rounded-full text-xs font-medium",
+                  status == :active && "bg-green-100 text-green-800 dark:bg-green-900/40 dark:text-green-300",
+                  status == :upcoming && "bg-blue-100 text-blue-800 dark:bg-blue-900/40 dark:text-blue-300",
+                  status == :past && "bg-gray-100 text-gray-600 dark:bg-gray-800 dark:text-gray-400"
+                ]}>
+                  {status |> to_string() |> String.capitalize()}
+                </span>
+              </td>
+              <td class="px-4 py-3 text-sm text-gray-600 dark:text-gray-400">
+                {if window.created_by, do: window.created_by.email, else: "—"}
+              </td>
+            </tr>
+          <% end %>
+        </tbody>
+      </table>
+    </div>
+  <% end %>
+</Layouts.authenticated>
diff --git a/lib/towerops_web/live/maintenance_live/show.ex b/lib/towerops_web/live/maintenance_live/show.ex
new file mode 100644
index 00000000..59b869bc
--- /dev/null
+++ b/lib/towerops_web/live/maintenance_live/show.ex
@@ -0,0 +1,56 @@
+defmodule ToweropsWeb.MaintenanceLive.Show do
+  use ToweropsWeb, :live_view
+
+  alias Towerops.Maintenance
+
+  @impl true
+  def mount(%{"id" => id}, _session, socket) do
+    window = Maintenance.get_window!(id)
+    timezone = socket.assigns.current_scope.timezone
+
+    {:ok,
+     socket
+     |> assign(:page_title, window.name)
+     |> assign(:window, window)
+     |> assign(:timezone, timezone)}
+  end
+
+  @impl true
+  def handle_event("delete", _params, socket) do
+    case Maintenance.delete_window(socket.assigns.window) do
+      {:ok, _} ->
+        {:noreply,
+         socket
+         |> put_flash(:info, t("Maintenance window deleted"))
+         |> push_navigate(to: ~p"/maintenance")}
+
+      {:error, _} ->
+        {:noreply, put_flash(socket, :error, t("Unable to delete maintenance window"))}
+    end
+  end
+
+  defp status_for(window) do
+    now = DateTime.utc_now()
+
+    cond do
+      DateTime.compare(window.starts_at, now) == :gt -> :upcoming
+      DateTime.compare(window.ends_at, now) == :lt -> :past
+      true -> :active
+    end
+  end
+
+  defp scope_label(window) do
+    cond do
+      window.device -> "Device: #{window.device.name}"
+      window.site -> "Site: #{window.site.name}"
+      true -> "Org-wide"
+    end
+  end
+
+  defp format_datetime(dt, timezone) do
+    case DateTime.shift_zone(dt, timezone) do
+      {:ok, local} -> Calendar.strftime(local, "%b %d, %Y %I:%M %p")
+      _ -> Calendar.strftime(dt, "%b %d, %Y %I:%M %p UTC")
+    end
+  end
+end
diff --git a/lib/towerops_web/live/maintenance_live/show.html.heex b/lib/towerops_web/live/maintenance_live/show.html.heex
new file mode 100644
index 00000000..22491e9e
--- /dev/null
+++ b/lib/towerops_web/live/maintenance_live/show.html.heex
@@ -0,0 +1,122 @@
+<Layouts.authenticated
+  flash={@flash}
+  current_scope={@current_scope}
+  active_page="maintenance"
+>
+  <div class="mb-6">
+    <.link
+      navigate={~p"/maintenance"}
+      class="inline-flex items-center gap-1 text-sm text-gray-500 hover:text-gray-700 dark:text-gray-400 dark:hover:text-gray-200"
+    >
+      <.icon name="hero-arrow-left" class="h-4 w-4" />
+      {t("Back to Maintenance Windows")}
+    </.link>
+  </div>
+
+  <% status = status_for(@window) %>
+
+  <%!-- Active banner --%>
+  <%= if status == :active do %>
+    <div class="mb-6 rounded-lg bg-green-50 dark:bg-green-900/20 border border-green-200 dark:border-green-800 p-4">
+      <div class="flex items-center gap-3">
+        <.icon name="hero-wrench-screwdriver" class="h-6 w-6 text-green-600 dark:text-green-400" />
+        <div>
+          <h3 class="text-sm font-semibold text-green-800 dark:text-green-300">{t("Currently Active")}</h3>
+          <p class="text-sm text-green-700 dark:text-green-400">{t("This maintenance window is currently in effect. Alerts are being suppressed.")}</p>
+        </div>
+      </div>
+    </div>
+  <% end %>
+
+  <div class="flex items-start justify-between mb-6">
+    <div>
+      <h1 class="text-2xl font-bold text-gray-900 dark:text-white">{@window.name}</h1>
+      <span class={[
+        "inline-flex items-center px-2 py-0.5 rounded-full text-xs font-medium mt-2",
+        status == :active && "bg-green-100 text-green-800 dark:bg-green-900/40 dark:text-green-300",
+        status == :upcoming && "bg-blue-100 text-blue-800 dark:bg-blue-900/40 dark:text-blue-300",
+        status == :past && "bg-gray-100 text-gray-600 dark:bg-gray-800 dark:text-gray-400"
+      ]}>
+        {status |> to_string() |> String.capitalize()}
+      </span>
+    </div>
+    <div class="flex items-center gap-2">
+      <.link
+        navigate={~p"/maintenance/#{@window.id}/edit"}
+        class="inline-flex items-center gap-2 rounded-lg bg-gray-100 px-4 py-2 text-sm font-medium text-gray-700 hover:bg-gray-200 dark:bg-gray-800 dark:text-gray-300 dark:hover:bg-gray-700 transition-colors"
+      >
+        <.icon name="hero-pencil" class="h-4 w-4" />
+        {t("Edit")}
+      </.link>
+      <button
+        type="button"
+        phx-click="delete"
+        data-confirm={t("Are you sure you want to delete this maintenance window?")}
+        class="inline-flex items-center gap-2 rounded-lg bg-red-100 px-4 py-2 text-sm font-medium text-red-700 hover:bg-red-200 dark:bg-red-900/30 dark:text-red-300 dark:hover:bg-red-900/50 transition-colors"
+      >
+        <.icon name="hero-trash" class="h-4 w-4" />
+        {t("Delete")}
+      </button>
+    </div>
+  </div>
+
+  <div class="rounded-lg border border-gray-200 dark:border-white/10 bg-white dark:bg-gray-900 divide-y divide-gray-200 dark:divide-white/10">
+    <%!-- Reason --%>
+    <%= if @window.reason do %>
+      <div class="px-6 py-4">
+        <dt class="text-xs font-semibold uppercase tracking-wider text-gray-500 dark:text-gray-400 mb-1">{t("Reason")}</dt>
+        <dd class="text-sm text-gray-900 dark:text-white whitespace-pre-wrap">{@window.reason}</dd>
+      </div>
+    <% end %>
+
+    <%!-- Scope --%>
+    <div class="px-6 py-4">
+      <dt class="text-xs font-semibold uppercase tracking-wider text-gray-500 dark:text-gray-400 mb-1">{t("Scope")}</dt>
+      <dd class="text-sm text-gray-900 dark:text-white">{scope_label(@window)}</dd>
+    </div>
+
+    <%!-- Time Range --%>
+    <div class="px-6 py-4">
+      <dt class="text-xs font-semibold uppercase tracking-wider text-gray-500 dark:text-gray-400 mb-1">{t("Time Range")}</dt>
+      <dd class="text-sm text-gray-900 dark:text-white">
+        {format_datetime(@window.starts_at, @timezone)} — {format_datetime(@window.ends_at, @timezone)}
+      </dd>
+    </div>
+
+    <%!-- Recurring --%>
+    <div class="px-6 py-4">
+      <dt class="text-xs font-semibold uppercase tracking-wider text-gray-500 dark:text-gray-400 mb-1">{t("Recurring")}</dt>
+      <dd class="text-sm text-gray-900 dark:text-white">
+        <%= if @window.recurring do %>
+          {t("Yes")} — {@window.recurrence_rule || t("No rule specified")}
+        <% else %>
+          {t("No")}
+        <% end %>
+      </dd>
+    </div>
+
+    <%!-- Suppress Alerts --%>
+    <div class="px-6 py-4">
+      <dt class="text-xs font-semibold uppercase tracking-wider text-gray-500 dark:text-gray-400 mb-1">{t("Suppress Alerts")}</dt>
+      <dd class="text-sm text-gray-900 dark:text-white">
+        <%= if @window.suppress_alerts do %>
+          <span class="inline-flex items-center gap-1 text-green-700 dark:text-green-400">
+            <.icon name="hero-check-circle" class="h-4 w-4" /> {t("Yes")}
+          </span>
+        <% else %>
+          <span class="inline-flex items-center gap-1 text-gray-500 dark:text-gray-400">
+            <.icon name="hero-x-circle" class="h-4 w-4" /> {t("No")}
+          </span>
+        <% end %>
+      </dd>
+    </div>
+
+    <%!-- Created By --%>
+    <div class="px-6 py-4">
+      <dt class="text-xs font-semibold uppercase tracking-wider text-gray-500 dark:text-gray-400 mb-1">{t("Created By")}</dt>
+      <dd class="text-sm text-gray-900 dark:text-white">
+        {if @window.created_by, do: @window.created_by.email, else: "—"}
+      </dd>
+    </div>
+  </div>
+</Layouts.authenticated>
diff --git a/lib/towerops_web/live/onboarding_live.ex b/lib/towerops_web/live/onboarding_live.ex
new file mode 100644
index 00000000..26909c1c
--- /dev/null
+++ b/lib/towerops_web/live/onboarding_live.ex
@@ -0,0 +1,251 @@
+defmodule ToweropsWeb.OnboardingLive do
+  @moduledoc false
+  use ToweropsWeb, :live_view
+
+  alias Towerops.Agents
+  alias Towerops.Integrations
+  alias Towerops.Integrations.Integration
+  alias Towerops.Organizations
+  alias Towerops.Sites
+
+  @steps [:snmp, :site, :billing, :agent]
+
+  @billing_providers [
+    %{id: "gaiia", name: "Gaiia", icon: "hero-user-group"},
+    %{id: "sonar", name: "Sonar", icon: "hero-currency-dollar"},
+    %{id: "splynx", name: "Splynx", icon: "hero-banknotes"},
+    %{id: "visp", name: "VISP", icon: "hero-cloud"}
+  ]
+
+  @impl true
+  def mount(_params, _session, socket) do
+    organization = socket.assigns.current_scope.organization
+    changeset = Organizations.change_organization(organization)
+
+    site_changeset = Sites.change_site(%Towerops.Sites.Site{}, %{})
+
+    {:ok,
+     socket
+     |> assign(:page_title, t("Setup"))
+     |> assign(:organization, organization)
+     |> assign(:step, :snmp)
+     |> assign(:steps, @steps)
+     |> assign(:form, to_form(changeset))
+     |> assign(:site_form, to_form(site_changeset, as: "site"))
+     |> assign(:billing_providers, @billing_providers)
+     |> assign(:selected_provider, nil)
+     |> assign(:integration_form, nil)
+     |> assign(:agent_token, nil)
+     |> assign(:agent_token_value, nil)}
+  end
+
+  @impl true
+  def handle_params(_params, _url, socket) do
+    {:noreply, socket}
+  end
+
+  # SNMP step events
+
+  @impl true
+  def handle_event("validate_snmp", %{"organization" => params}, socket) do
+    changeset =
+      socket.assigns.organization
+      |> Organizations.change_organization(params)
+      |> Map.put(:action, :validate)
+
+    {:noreply, assign(socket, :form, to_form(changeset))}
+  end
+
+  @impl true
+  def handle_event("save_snmp", %{"organization" => params}, socket) do
+    case Organizations.update_organization(socket.assigns.organization, params) do
+      {:ok, organization} ->
+        {:noreply,
+         socket
+         |> assign(:organization, organization)
+         |> put_flash(:info, t("SNMP configuration saved"))
+         |> assign(:step, :site)}
+
+      {:error, changeset} ->
+        {:noreply, assign(socket, :form, to_form(changeset))}
+    end
+  end
+
+  # Site step events
+
+  @impl true
+  def handle_event("validate_site", %{"site" => params}, socket) do
+    changeset =
+      %Towerops.Sites.Site{}
+      |> Sites.change_site(params)
+      |> Map.put(:action, :validate)
+
+    {:noreply, assign(socket, :site_form, to_form(changeset, as: "site"))}
+  end
+
+  @impl true
+  def handle_event("save_site", %{"site" => params}, socket) do
+    org = socket.assigns.organization
+    attrs = Map.put(params, "organization_id", org.id)
+
+    case Sites.create_site(attrs) do
+      {:ok, _site} ->
+        # Enable sites on the org if not already
+        unless org.use_sites do
+          Organizations.update_organization(org, %{use_sites: true})
+        end
+
+        {:noreply,
+         socket
+         |> put_flash(:info, t("Site created"))
+         |> assign(:step, :billing)}
+
+      {:error, changeset} ->
+        {:noreply, assign(socket, :site_form, to_form(changeset, as: "site"))}
+    end
+  end
+
+  # Billing step events
+
+  @impl true
+  def handle_event("select_provider", %{"provider" => provider}, socket) do
+    form =
+      %Integration{}
+      |> Integrations.change_integration(%{provider: provider})
+      |> to_form()
+
+    {:noreply,
+     socket
+     |> assign(:selected_provider, provider)
+     |> assign(:integration_form, form)}
+  end
+
+  @impl true
+  def handle_event("validate_integration", %{"integration" => params}, socket) do
+    changeset =
+      %Integration{}
+      |> Integrations.change_integration(normalize_integration_params(params, socket.assigns.selected_provider))
+      |> Map.put(:action, :validate)
+
+    {:noreply, assign(socket, :integration_form, to_form(changeset))}
+  end
+
+  @impl true
+  def handle_event("save_integration", %{"integration" => params}, socket) do
+    org = socket.assigns.organization
+    provider = socket.assigns.selected_provider
+    attrs = normalize_integration_params(params, provider) |> Map.put(:provider, provider) |> Map.put(:enabled, true)
+
+    case Integrations.create_integration(org.id, attrs) do
+      {:ok, _integration} ->
+        {:noreply,
+         socket
+         |> put_flash(:info, t("Integration saved"))
+         |> assign(:step, :agent)
+         |> load_agent_token()}
+
+      {:error, changeset} ->
+        {:noreply, assign(socket, :integration_form, to_form(changeset))}
+    end
+  end
+
+  # Navigation events
+
+  @impl true
+  def handle_event("skip", _params, socket) do
+    next = next_step(socket.assigns.step)
+
+    socket =
+      if next == :done do
+        complete_onboarding(socket)
+      else
+        socket = assign(socket, :step, next)
+        if next == :agent, do: load_agent_token(socket), else: socket
+      end
+
+    {:noreply, socket}
+  end
+
+  @impl true
+  def handle_event("finish", _params, socket) do
+    {:noreply, complete_onboarding(socket)}
+  end
+
+  @impl true
+  def handle_event("go_to_step", %{"step" => step}, socket) do
+    step = String.to_existing_atom(step)
+
+    socket =
+      if step == :agent do
+        socket |> assign(:step, step) |> load_agent_token()
+      else
+        assign(socket, :step, step)
+      end
+
+    {:noreply, socket}
+  end
+
+  # Private helpers
+
+  defp next_step(:snmp), do: :site
+  defp next_step(:site), do: :billing
+  defp next_step(:billing), do: :agent
+  defp next_step(:agent), do: :done
+
+  defp step_index(:snmp), do: 0
+  defp step_index(:site), do: 1
+  defp step_index(:billing), do: 2
+  defp step_index(:agent), do: 3
+
+  defp step_label(:snmp), do: t("SNMP")
+  defp step_label(:site), do: t("Site")
+  defp step_label(:billing), do: t("Billing")
+  defp step_label(:agent), do: t("Agent")
+
+  defp complete_onboarding(socket) do
+    org = socket.assigns.organization
+    Organizations.update_organization(org, %{onboarding_completed: true})
+
+    socket
+    |> put_flash(:info, t("Setup complete"))
+    |> push_navigate(to: ~p"/dashboard")
+  end
+
+  defp load_agent_token(socket) do
+    org = socket.assigns.organization
+    tokens = Agents.list_organization_agent_tokens(org.id)
+
+    case tokens do
+      [token | _] ->
+        assign(socket, agent_token: token, agent_token_value: nil)
+
+      [] ->
+        case Agents.create_agent_token(org.id, "Default Agent") do
+          {:ok, token, token_value} ->
+            assign(socket, agent_token: token, agent_token_value: token_value)
+
+          {:error, _} ->
+            assign(socket, agent_token: nil, agent_token_value: nil)
+        end
+    end
+  end
+
+  defp normalize_integration_params(params, "sonar") do
+    %{credentials: %{
+      "instance_url" => String.trim(Map.get(params, "instance_url", "")),
+      "api_token" => Map.get(params, "api_token", "")
+    }}
+  end
+
+  defp normalize_integration_params(params, "splynx") do
+    %{credentials: %{
+      "instance_url" => String.trim(Map.get(params, "instance_url", "")),
+      "api_key" => Map.get(params, "api_key", ""),
+      "api_secret" => Map.get(params, "api_secret", "")
+    }}
+  end
+
+  defp normalize_integration_params(params, _provider) do
+    %{credentials: %{"api_key" => Map.get(params, "api_key", "")}}
+  end
+end
diff --git a/lib/towerops_web/live/onboarding_live.html.heex b/lib/towerops_web/live/onboarding_live.html.heex
new file mode 100644
index 00000000..d9df6bee
--- /dev/null
+++ b/lib/towerops_web/live/onboarding_live.html.heex
@@ -0,0 +1,309 @@
+<Layouts.authenticated
+  flash={@flash}
+  current_scope={@current_scope}
+>
+  <div class="max-w-2xl mx-auto py-8">
+    <%!-- Step indicator --%>
+    <nav class="mb-8">
+      <ol class="flex items-center gap-2">
+        <%= for step <- @steps do %>
+          <li class="flex items-center gap-2">
+            <button
+              phx-click="go_to_step"
+              phx-value-step={step}
+              class={[
+                "flex items-center gap-1.5 text-sm font-medium px-2 py-1 rounded transition",
+                if(step == @step,
+                  do: "text-indigo-600 dark:text-indigo-400 bg-indigo-50 dark:bg-indigo-900/30",
+                  else: if(step_index(step) < step_index(@step),
+                    do: "text-gray-600 dark:text-gray-300 hover:text-gray-900 dark:hover:text-white",
+                    else: "text-gray-400 dark:text-gray-500"
+                  )
+                )
+              ]}
+            >
+              <span class={[
+                "flex items-center justify-center w-5 h-5 rounded-full text-xs font-bold",
+                if(step == @step,
+                  do: "bg-indigo-600 text-white dark:bg-indigo-500",
+                  else: if(step_index(step) < step_index(@step),
+                    do: "bg-gray-400 dark:bg-gray-500 text-white",
+                    else: "bg-gray-200 dark:bg-gray-700 text-gray-500 dark:text-gray-400"
+                  )
+                )
+              ]}>
+                <%= if step_index(step) < step_index(@step) do %>
+                  <.icon name="hero-check-mini" class="h-3 w-3" />
+                <% else %>
+                  {step_index(step) + 1}
+                <% end %>
+              </span>
+              {step_label(step)}
+            </button>
+            <%= if step != List.last(@steps) do %>
+              <.icon name="hero-chevron-right-mini" class="h-4 w-4 text-gray-300 dark:text-gray-600" />
+            <% end %>
+          </li>
+        <% end %>
+      </ol>
+    </nav>
+
+    <%!-- Step content --%>
+    <div class="bg-white dark:bg-white/5 rounded-lg border border-gray-200 dark:border-white/10 p-6">
+      <%= case @step do %>
+        <% :snmp -> %>
+          <h2 class="text-lg font-semibold text-gray-900 dark:text-white mb-1">
+            {t("SNMP Configuration")}
+          </h2>
+          <p class="text-sm text-gray-500 dark:text-gray-400 mb-6">
+            {t("Set organization-wide SNMP defaults. Can be overridden per-site or per-device.")}
+          </p>
+
+          <.form for={@form} phx-change="validate_snmp" phx-submit="save_snmp">
+            <div class="space-y-4">
+              <.input
+                field={@form[:snmp_version]}
+                type="select"
+                label={t("SNMP Version")}
+                options={[{"v1", "1"}, {"v2c", "2c"}, {"v3", "3"}]}
+              />
+
+              <%= if @form[:snmp_version].value in ["1", "2c"] do %>
+                <.input
+                  field={@form[:snmp_community]}
+                  type="text"
+                  label={t("Community String")}
+                  placeholder="public"
+                />
+              <% end %>
+
+              <%= if @form[:snmp_version].value == "3" do %>
+                <.input
+                  field={@form[:snmpv3_username]}
+                  type="text"
+                  label={t("Username")}
+                />
+                <.input
+                  field={@form[:snmpv3_auth_protocol]}
+                  type="select"
+                  label={t("Auth Protocol")}
+                  prompt="None"
+                  options={["MD5", "SHA", "SHA-224", "SHA-256", "SHA-384", "SHA-512"]}
+                />
+                <.input
+                  field={@form[:snmpv3_auth_password]}
+                  type="password"
+                  label={t("Auth Password")}
+                />
+                <.input
+                  field={@form[:snmpv3_priv_protocol]}
+                  type="select"
+                  label={t("Privacy Protocol")}
+                  prompt="None"
+                  options={["DES", "AES", "AES-192", "AES-256", "AES-256-C"]}
+                />
+                <.input
+                  field={@form[:snmpv3_priv_password]}
+                  type="password"
+                  label={t("Privacy Password")}
+                />
+              <% end %>
+
+              <div class="flex items-center justify-between pt-4 border-t border-gray-200 dark:border-white/10">
+                <button
+                  type="button"
+                  phx-click="skip"
+                  class="text-sm text-gray-500 dark:text-gray-400 hover:text-gray-700 dark:hover:text-gray-200"
+                >
+                  {t("Skip")}
+                </button>
+                <button
+                  type="submit"
+                  class="rounded-md bg-indigo-600 px-4 py-2 text-sm font-semibold text-white hover:bg-indigo-500 dark:bg-indigo-500 dark:hover:bg-indigo-400"
+                >
+                  {t("Save & Continue")}
+                </button>
+              </div>
+            </div>
+          </.form>
+
+        <% :site -> %>
+          <h2 class="text-lg font-semibold text-gray-900 dark:text-white mb-1">
+            {t("Add Your First Site")}
+          </h2>
+          <p class="text-sm text-gray-500 dark:text-gray-400 mb-6">
+            {t("Sites represent physical locations — tower sites, POPs, data centers, etc.")}
+          </p>
+
+          <.form for={@site_form} phx-change="validate_site" phx-submit="save_site">
+            <div class="space-y-4">
+              <.input field={@site_form[:name]} type="text" label={t("Name")} placeholder="e.g. Main Tower" required />
+              <.input field={@site_form[:address]} type="text" label={t("Address")} placeholder="123 Tower Rd" />
+              <div class="grid grid-cols-2 gap-4">
+                <.input field={@site_form[:latitude]} type="number" label={t("Latitude")} step="any" placeholder="38.8977" />
+                <.input field={@site_form[:longitude]} type="number" label={t("Longitude")} step="any" placeholder="-77.0365" />
+              </div>
+
+              <div class="flex items-center justify-between pt-4 border-t border-gray-200 dark:border-white/10">
+                <button
+                  type="button"
+                  phx-click="skip"
+                  class="text-sm text-gray-500 dark:text-gray-400 hover:text-gray-700 dark:hover:text-gray-200"
+                >
+                  {t("Skip")}
+                </button>
+                <button
+                  type="submit"
+                  class="rounded-md bg-indigo-600 px-4 py-2 text-sm font-semibold text-white hover:bg-indigo-500 dark:bg-indigo-500 dark:hover:bg-indigo-400"
+                >
+                  {t("Create Site & Continue")}
+                </button>
+              </div>
+            </div>
+          </.form>
+
+        <% :billing -> %>
+          <h2 class="text-lg font-semibold text-gray-900 dark:text-white mb-1">
+            {t("Connect a Billing Platform")}
+          </h2>
+          <p class="text-sm text-gray-500 dark:text-gray-400 mb-6">
+            {t("Optional. Sync subscriber data for outage impact analysis and inventory reconciliation.")}
+          </p>
+
+          <%= if @selected_provider == nil do %>
+            <div class="grid grid-cols-2 gap-3 mb-6">
+              <%= for provider <- @billing_providers do %>
+                <button
+                  type="button"
+                  phx-click="select_provider"
+                  phx-value-provider={provider.id}
+                  class="flex items-center gap-3 p-4 rounded-lg border border-gray-200 dark:border-white/10 hover:border-indigo-400 dark:hover:border-indigo-500 hover:bg-gray-50 dark:hover:bg-white/5 transition text-left"
+                >
+                  <.icon name={provider.icon} class="h-6 w-6 text-gray-400 dark:text-gray-500" />
+                  <span class="text-sm font-medium text-gray-900 dark:text-white">{provider.name}</span>
+                </button>
+              <% end %>
+            </div>
+          <% else %>
+            <div class="mb-4">
+              <button
+                type="button"
+                phx-click="select_provider"
+                phx-value-provider=""
+                class="text-sm text-gray-500 dark:text-gray-400 hover:text-gray-700 dark:hover:text-gray-200"
+              >
+                ← {t("Back to providers")}
+              </button>
+            </div>
+
+            <.form for={@integration_form} phx-change="validate_integration" phx-submit="save_integration">
+              <div class="space-y-4">
+                <%= case @selected_provider do %>
+                  <% "sonar" -> %>
+                    <.input name="integration[instance_url]" type="text" label={t("Instance URL")} placeholder="https://myisp.sonar.software" value="" />
+                    <.input name="integration[api_token]" type="password" label={t("API Token")} value="" />
+                  <% "splynx" -> %>
+                    <.input name="integration[instance_url]" type="text" label={t("Instance URL")} placeholder="https://myisp.splynx.app" value="" />
+                    <.input name="integration[api_key]" type="text" label={t("API Key")} value="" />
+                    <.input name="integration[api_secret]" type="password" label={t("API Secret")} value="" />
+                  <% _ -> %>
+                    <.input name="integration[api_key]" type="password" label={t("API Key")} value="" />
+                <% end %>
+
+                <div class="flex items-center justify-between pt-4 border-t border-gray-200 dark:border-white/10">
+                  <button
+                    type="button"
+                    phx-click="skip"
+                    class="text-sm text-gray-500 dark:text-gray-400 hover:text-gray-700 dark:hover:text-gray-200"
+                  >
+                    {t("Skip")}
+                  </button>
+                  <button
+                    type="submit"
+                    class="rounded-md bg-indigo-600 px-4 py-2 text-sm font-semibold text-white hover:bg-indigo-500 dark:bg-indigo-500 dark:hover:bg-indigo-400"
+                  >
+                    {t("Save & Continue")}
+                  </button>
+                </div>
+              </div>
+            </.form>
+          <% end %>
+
+          <%= if @selected_provider == nil do %>
+            <div class="flex items-center justify-between pt-4 border-t border-gray-200 dark:border-white/10">
+              <button
+                type="button"
+                phx-click="skip"
+                class="text-sm font-medium text-gray-500 dark:text-gray-400 hover:text-gray-700 dark:hover:text-gray-200"
+              >
+                {t("Skip — I'll set this up later")}
+              </button>
+            </div>
+          <% end %>
+
+        <% :agent -> %>
+          <h2 class="text-lg font-semibold text-gray-900 dark:text-white mb-1">
+            {t("Deploy Agent")}
+          </h2>
+          <p class="text-sm text-gray-500 dark:text-gray-400 mb-6">
+            {t("The TowerOps agent polls your network devices via SNMP. Deploy it on a host with network access to your infrastructure.")}
+          </p>
+
+          <%= if @agent_token do %>
+            <div class="space-y-4">
+              <%= if @agent_token_value do %>
+                <div class="rounded-md bg-amber-50 dark:bg-amber-900/20 border border-amber-200 dark:border-amber-800 p-3">
+                  <p class="text-sm text-amber-800 dark:text-amber-200">
+                    <.icon name="hero-exclamation-triangle" class="h-4 w-4 inline -mt-0.5" />
+                    {t("Save this token — it won't be shown again.")}
+                  </p>
+                  <code class="mt-2 block text-xs font-mono bg-amber-100 dark:bg-amber-900/40 rounded p-2 break-all select-all text-amber-900 dark:text-amber-100">
+                    {@agent_token_value}
+                  </code>
+                </div>
+              <% else %>
+                <div class="rounded-md bg-gray-50 dark:bg-white/5 border border-gray-200 dark:border-white/10 p-3">
+                  <p class="text-xs text-gray-500 dark:text-gray-400">
+                    {t("Agent:")} <span class="font-medium text-gray-900 dark:text-white">{@agent_token.name}</span>
+                  </p>
+                </div>
+              <% end %>
+
+              <div>
+                <h3 class="text-sm font-medium text-gray-900 dark:text-white mb-2">{t("Docker")}</h3>
+                <pre class="text-xs font-mono bg-gray-900 text-green-400 rounded-lg p-4 overflow-x-auto select-all"><code>docker run -d \
+  --name towerops-agent \
+  --restart unless-stopped \
+  -e TOWEROPS_TOKEN=<%= if @agent_token_value, do: @agent_token_value, else: "<your-token>" %> \
+  -e TOWEROPS_SERVER=<%= ToweropsWeb.Endpoint.url() %> \
+  --network host \
+  ghcr.io/towerops/agent:latest</code></pre>
+              </div>
+
+              <div>
+                <h3 class="text-sm font-medium text-gray-900 dark:text-white mb-2">{t("Systemd")}</h3>
+                <pre class="text-xs font-mono bg-gray-900 text-green-400 rounded-lg p-4 overflow-x-auto select-all"><code>curl -sSL https://install.towerops.net | \
+  TOWEROPS_TOKEN=<%= if @agent_token_value, do: @agent_token_value, else: "<your-token>" %> \
+  TOWEROPS_SERVER=<%= ToweropsWeb.Endpoint.url() %> \
+  bash</code></pre>
+              </div>
+            </div>
+          <% else %>
+            <p class="text-sm text-gray-500 dark:text-gray-400">
+              {t("Failed to create agent token. You can create one later in Settings → Agents.")}
+            </p>
+          <% end %>
+
+          <div class="flex items-center justify-end pt-6 border-t border-gray-200 dark:border-white/10 mt-6">
+            <button
+              type="button"
+              phx-click="finish"
+              class="rounded-md bg-indigo-600 px-4 py-2 text-sm font-semibold text-white hover:bg-indigo-500 dark:bg-indigo-500 dark:hover:bg-indigo-400"
+            >
+              {t("Done — Go to Dashboard")}
+            </button>
+          </div>
+      <% end %>
+    </div>
+  </div>
+</Layouts.authenticated>
diff --git a/lib/towerops_web/live/site_live/show.html.heex b/lib/towerops_web/live/site_live/show.html.heex
index e078e59c..1f90b26f 100644
--- a/lib/towerops_web/live/site_live/show.html.heex
+++ b/lib/towerops_web/live/site_live/show.html.heex
@@ -425,7 +425,7 @@
           >
             <div class="absolute inset-0 flex items-center justify-center" data-loading>
               <div class="flex flex-col items-center gap-2">
-                <div class="h-8 w-8 animate-spin rounded-full border-2 border-gray-200 border-t-blue-500">
+                <div class="h-8 w-8 animate-spin rounded-full border-2 border-gray-200 dark:border-gray-700 border-t-blue-500">
                 </div>
                 <span class="text-xs text-gray-400">{t("Loading chart...")}</span>
               </div>
diff --git a/lib/towerops_web/live/trace_live/index.ex b/lib/towerops_web/live/trace_live/index.ex
index 7890c48d..255670a3 100644
--- a/lib/towerops_web/live/trace_live/index.ex
+++ b/lib/towerops_web/live/trace_live/index.ex
@@ -157,7 +157,7 @@ defmodule ToweropsWeb.TraceLive.Index do
 
   defp device_status_color(:up), do: "text-green-600 dark:text-green-400"
   defp device_status_color(:down), do: "text-red-600 dark:text-red-400"
-  defp device_status_color(_), do: "text-gray-500"
+  defp device_status_color(_), do: "text-gray-500 dark:text-gray-400"
 
   defp format_speed(nil), do: "—"
   defp format_speed(speed) when is_number(speed) and speed >= 1000, do: "#{Float.round(speed / 1000, 1)} Gbps"
diff --git a/lib/towerops_web/live/trace_live/index.html.heex b/lib/towerops_web/live/trace_live/index.html.heex
index 1da7fd3a..5b81d2c4 100644
--- a/lib/towerops_web/live/trace_live/index.html.heex
+++ b/lib/towerops_web/live/trace_live/index.html.heex
@@ -216,7 +216,7 @@
                   <div class="text-sm text-gray-700 dark:text-gray-300">
                     {@trace.access_point.name}
                   </div>
-                  <div :if={@trace.access_point.model} class="text-xs text-gray-500">
+                  <div :if={@trace.access_point.model} class="text-xs text-gray-500 dark:text-gray-400">
                     {@trace.access_point.model}
                   </div>
                 </div>
@@ -362,7 +362,7 @@
                     >
                       <span class="text-gray-700 dark:text-gray-300 truncate">{ap.name}</span>
                       <div class="flex items-center gap-2">
-                        <span class="text-gray-500">{ap.subscriber_count || 0} subs</span>
+                        <span class="text-gray-500 dark:text-gray-400">{ap.subscriber_count || 0} subs</span>
                         <span
                           :if={ap.qoe_score}
                           class={["font-medium", score_color(ap.qoe_score)]}
@@ -446,7 +446,7 @@
                     <span class="font-medium text-gray-900 dark:text-white">
                       {Map.get(change, :changed_sections, []) |> Enum.join(", ")}
                     </span>
-                    <span class="text-xs text-gray-500">
+                    <span class="text-xs text-gray-500 dark:text-gray-400">
                       {format_relative_time(change.changed_at)}
                     </span>
                   </div>
@@ -511,7 +511,7 @@
           <div class="overflow-x-auto">
             <table class="table table-sm">
               <thead>
-                <tr class="text-xs uppercase text-gray-500">
+                <tr class="text-xs uppercase text-gray-500 dark:text-gray-400">
                   <th>Name</th>
                   <th>IP</th>
                   <th>Model</th>
diff --git a/lib/towerops_web/router.ex b/lib/towerops_web/router.ex
index 554df95a..5f966fa0 100644
--- a/lib/towerops_web/router.ex
+++ b/lib/towerops_web/router.ex
@@ -415,6 +415,12 @@ defmodule ToweropsWeb.Router do
       # Activity feed
       live "/activity", ActivityFeedLive, :index
 
+      # Maintenance windows
+      live "/maintenance", MaintenanceLive.Index, :index
+      live "/maintenance/new", MaintenanceLive.Form, :new
+      live "/maintenance/:id", MaintenanceLive.Show, :show
+      live "/maintenance/:id/edit", MaintenanceLive.Form, :edit
+
       # Changelog
       live "/changelog", ChangelogLive, :index
 
diff --git a/priv/repo/migrations/20260216160000_add_onboarding_completed_to_organizations.exs b/priv/repo/migrations/20260216160000_add_onboarding_completed_to_organizations.exs
new file mode 100644
index 00000000..cfbb39ba
--- /dev/null
+++ b/priv/repo/migrations/20260216160000_add_onboarding_completed_to_organizations.exs
@@ -0,0 +1,9 @@
+defmodule Towerops.Repo.Migrations.AddOnboardingCompletedToOrganizations do
+  use Ecto.Migration
+
+  def change do
+    alter table(:organizations) do
+      add :onboarding_completed, :boolean, default: false, null: false
+    end
+  end
+end
