diff --git a/asciinema/compose.yaml b/asciinema/compose.yaml
index a4e74c3..7e68922 100644
--- a/asciinema/compose.yaml
+++ b/asciinema/compose.yaml
@@ -8,6 +8,7 @@ services:
     volumes:
       - asciinema_data:/var/opt/asciinema
       - ./custom.exs:/opt/app/etc/custom.exs:ro
+      - ./theme:/opt/app/etc/theme:ro
     environment:
       SECRET_KEY_BASE: ${ASCIINEMA_SECRET_KEY}
       URL_HOST: ${ASCIINEMA_TRAEFIK_HOST}
diff --git a/asciinema/custom.exs b/asciinema/custom.exs
index dd1b726..a1cc669 100644
--- a/asciinema/custom.exs
+++ b/asciinema/custom.exs
@@ -15,3 +15,58 @@ config :asciinema, Asciinema.Emails.Mailer,
     verify: :verify_none,
     versions: [:"tlsv1.2", :"tlsv1.3"]
   ]
+
+# Custom theme configuration - inject custom CSS and favicon
+defmodule AsciinemaWeb.CustomThemePlug do
+  @moduledoc """
+  Plug to inject custom CSS and favicon into HTML responses
+  """
+  import Plug.Conn
+
+  def init(opts), do: opts
+
+  def call(conn, _opts) do
+    register_before_send(conn, fn conn ->
+      if html_response?(conn) do
+        inject_custom_theme(conn)
+      else
+        conn
+      end
+    end)
+  end
+
+  defp html_response?(conn) do
+    case get_resp_header(conn, "content-type") do
+      [content_type | _] -> String.contains?(content_type, "text/html")
+      [] -> false
+    end
+  end
+
+  defp inject_custom_theme(conn) do
+    custom_head = """
+    <link rel="stylesheet" href="/theme/custom.css">
+    <link rel="icon" type="image/svg+xml" href="/theme/favicon.svg">
+    """
+
+    case conn.resp_body do
+      body when is_binary(body) ->
+        new_body = String.replace(body, "</head>", "#{custom_head}</head>")
+        %{conn | resp_body: new_body}
+      _ ->
+        conn
+    end
+  end
+end
+
+# Configure Phoenix endpoint to serve custom theme files
+config :asciinema, AsciinemaWeb.Endpoint,
+  # Serve theme files from /opt/app/etc/theme
+  static_dirs: %{
+    at: "/theme",
+    from: "/opt/app/etc/theme",
+    gzip: false
+  }
+
+# Inject the custom theme Plug into the endpoint
+config :asciinema, AsciinemaWeb.Endpoint,
+  plug: AsciinemaWeb.CustomThemePlug
diff --git a/asciinema/theme/custom.css b/asciinema/theme/custom.css
new file mode 100644
index 0000000..9d092f1
--- /dev/null
+++ b/asciinema/theme/custom.css
@@ -0,0 +1,278 @@
+/* Pivoine Rose Custom Theme for Asciinema Server */
+/* Primary Color: #CE275B (Pivoine Rose) */
+/* Background: Gray tones */
+
+:root {
+  --pivoine-rose: #CE275B;
+  --pivoine-rose-dark: #A61E47;
+  --pivoine-rose-light: #E63368;
+  --gray-50: #FAFAFA;
+  --gray-100: #F5F5F5;
+  --gray-200: #EEEEEE;
+  --gray-300: #E0E0E0;
+  --gray-400: #BDBDBD;
+  --gray-500: #9E9E9E;
+  --gray-600: #757575;
+  --gray-700: #616161;
+  --gray-800: #424242;
+  --gray-900: #212121;
+}
+
+/* Override Bootstrap primary color */
+.btn-primary,
+.badge-primary,
+.bg-primary,
+.text-primary,
+a.text-primary:hover,
+a.text-primary:focus {
+  background-color: var(--pivoine-rose) !important;
+  border-color: var(--pivoine-rose) !important;
+  color: white !important;
+}
+
+.btn-primary:hover,
+.btn-primary:focus,
+.btn-primary:active {
+  background-color: var(--pivoine-rose-dark) !important;
+  border-color: var(--pivoine-rose-dark) !important;
+}
+
+/* Links */
+a {
+  color: var(--pivoine-rose);
+}
+
+a:hover,
+a:focus {
+  color: var(--pivoine-rose-dark);
+}
+
+/* Body and backgrounds */
+body {
+  background-color: var(--gray-100);
+  color: var(--gray-900);
+}
+
+/* Header/Navbar */
+.navbar {
+  background-color: var(--gray-800) !important;
+  border-bottom: 3px solid var(--pivoine-rose);
+}
+
+.navbar-dark .navbar-brand {
+  color: var(--pivoine-rose) !important;
+  font-weight: 600;
+}
+
+.navbar-dark .navbar-brand:hover {
+  color: var(--pivoine-rose-light) !important;
+}
+
+.navbar-dark .navbar-nav .nav-link {
+  color: var(--gray-200) !important;
+}
+
+.navbar-dark .navbar-nav .nav-link:hover {
+  color: var(--pivoine-rose) !important;
+}
+
+/* Cards and containers */
+.card,
+.list-group-item {
+  background-color: white;
+  border-color: var(--gray-300);
+  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
+}
+
+.card-header,
+.list-group-item.active {
+  background-color: var(--gray-800);
+  border-color: var(--gray-700);
+  color: white;
+}
+
+/* Main content area */
+.container,
+.container-fluid {
+  background-color: var(--gray-50);
+  padding: 2rem 1rem;
+}
+
+main {
+  background-color: white;
+  border-radius: 4px;
+  padding: 2rem;
+  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
+}
+
+/* Buttons */
+.btn {
+  border-radius: 4px;
+  font-weight: 500;
+  transition: all 0.2s ease;
+}
+
+.btn-outline-primary {
+  color: var(--pivoine-rose);
+  border-color: var(--pivoine-rose);
+}
+
+.btn-outline-primary:hover {
+  background-color: var(--pivoine-rose);
+  border-color: var(--pivoine-rose);
+  color: white;
+}
+
+.btn-secondary {
+  background-color: var(--gray-600);
+  border-color: var(--gray-600);
+}
+
+.btn-secondary:hover {
+  background-color: var(--gray-700);
+  border-color: var(--gray-700);
+}
+
+/* Forms */
+.form-control {
+  border-color: var(--gray-300);
+  border-radius: 4px;
+}
+
+.form-control:focus {
+  border-color: var(--pivoine-rose);
+  box-shadow: 0 0 0 0.2rem rgba(206, 39, 91, 0.25);
+}
+
+/* Alerts */
+.alert-primary {
+  background-color: rgba(206, 39, 91, 0.1);
+  border-color: var(--pivoine-rose);
+  color: var(--pivoine-rose-dark);
+}
+
+/* Tables */
+.table {
+  background-color: white;
+}
+
+.table thead th {
+  background-color: var(--gray-100);
+  border-bottom: 2px solid var(--pivoine-rose);
+  color: var(--gray-800);
+}
+
+.table-striped tbody tr:nth-of-type(odd) {
+  background-color: var(--gray-50);
+}
+
+/* Pagination */
+.pagination .page-item.active .page-link {
+  background-color: var(--pivoine-rose);
+  border-color: var(--pivoine-rose);
+}
+
+.pagination .page-link {
+  color: var(--pivoine-rose);
+}
+
+.pagination .page-link:hover {
+  color: var(--pivoine-rose-dark);
+  background-color: var(--gray-100);
+}
+
+/* Player/Terminal */
+.asciinema-player-wrapper,
+.asciinema-terminal {
+  border-radius: 4px;
+  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
+}
+
+/* Footer */
+footer {
+  background-color: var(--gray-800);
+  color: var(--gray-400);
+  border-top: 3px solid var(--pivoine-rose);
+}
+
+footer a {
+  color: var(--gray-300);
+}
+
+footer a:hover {
+  color: var(--pivoine-rose);
+}
+
+/* Badges */
+.badge {
+  border-radius: 3px;
+  font-weight: 500;
+}
+
+.badge-secondary {
+  background-color: var(--gray-600);
+}
+
+/* Dropdowns */
+.dropdown-menu {
+  border-color: var(--gray-300);
+  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
+}
+
+.dropdown-item:hover,
+.dropdown-item:focus {
+  background-color: var(--gray-100);
+  color: var(--pivoine-rose);
+}
+
+/* Loading/Progress */
+.progress-bar {
+  background-color: var(--pivoine-rose);
+}
+
+/* Custom recording list */
+.recording-item {
+  transition: transform 0.2s ease, box-shadow 0.2s ease;
+}
+
+.recording-item:hover {
+  transform: translateY(-2px);
+  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
+}
+
+/* Logo styling */
+.navbar-brand svg,
+.navbar-brand img {
+  filter: brightness(0) saturate(100%) invert(28%) sepia(91%) saturate(2059%) hue-rotate(325deg) brightness(89%) contrast(92%);
+  transition: filter 0.2s ease;
+}
+
+.navbar-brand:hover svg,
+.navbar-brand:hover img {
+  filter: brightness(0) saturate(100%) invert(36%) sepia(96%) saturate(2373%) hue-rotate(329deg) brightness(96%) contrast(87%);
+}
+
+/* Responsive adjustments */
+@media (max-width: 768px) {
+  main {
+    padding: 1rem;
+  }
+
+  .container,
+  .container-fluid {
+    padding: 1rem 0.5rem;
+  }
+}
+
+/* Smooth animations */
+* {
+  transition-property: background-color, border-color, color;
+  transition-duration: 0.15s;
+  transition-timing-function: ease-in-out;
+}
+
+button,
+.btn,
+a {
+  transition-property: all;
+}
diff --git a/asciinema/theme/favicon.svg b/asciinema/theme/favicon.svg
new file mode 100644
index 0000000..2a96a8b
--- /dev/null
+++ b/asciinema/theme/favicon.svg
@@ -0,0 +1,24 @@
+<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100">
+  <!-- Placeholder Favicon - Pivoine Rose themed -->
+  <defs>
+    <linearGradient id="grad" x1="0%" y1="0%" x2="100%" y2="100%">
+      <stop offset="0%" style="stop-color:#E63368;stop-opacity:1" />
+      <stop offset="100%" style="stop-color:#CE275B;stop-opacity:1" />
+    </linearGradient>
+  </defs>
+
+  <!-- Background circle -->
+  <circle cx="50" cy="50" r="48" fill="url(#grad)" stroke="#A61E47" stroke-width="2"/>
+
+  <!-- Terminal symbol/Play button hybrid -->
+  <g fill="#FFFFFF">
+    <!-- Terminal prompt bracket -->
+    <path d="M 30 35 L 25 40 L 30 45" stroke="#FFFFFF" stroke-width="3" fill="none" stroke-linecap="round"/>
+
+    <!-- Play triangle (for asciinema recording) -->
+    <path d="M 45 35 L 45 65 L 70 50 Z" fill="#FFFFFF"/>
+  </g>
+
+  <!-- Optional dot for recording indicator -->
+  <circle cx="72" cy="30" r="6" fill="#FFFFFF" opacity="0.9"/>
+</svg>