diff --git a/ht_booking/assets/views/base.html b/ht_booking/assets/views/base.html
index da3a289..9c544c3 100644
--- a/ht_booking/assets/views/base.html
+++ b/ht_booking/assets/views/base.html
@@ -38,6 +38,21 @@
   <style>
     /* Keep buttons static — disable daisyUI's press-shrink animation. */
     .btn { --animation-btn: 0; --btn-focus-scale: 1; }
+
+    /* App-wide contrast. The daisyUI base palette is very low-contrast, so
+       panels, tables and form fields blend into the page. Tie their edges to
+       base-content so every region is easy to pick out by eye, on light and
+       dark alike. The calendar grid keeps its own stronger #cal rules. */
+    .border.border-base-300 { border-color: hsl(var(--bc) / 0.2); }
+    .navbar { border-bottom: 1px solid hsl(var(--bc) / 0.15); }
+    .input.input-bordered,
+    .select.select-bordered,
+    .textarea.textarea-bordered { border-color: hsl(var(--bc) / 0.3); }
+    .checkbox { border-color: hsl(var(--bc) / 0.3); }
+    .table thead th { background-color: hsl(var(--bc) / 0.08); }
+    .table tbody tr:not(:last-child) :where(th, td) {
+      border-bottom-color: hsl(var(--bc) / 0.18);
+    }
   </style>
   {% block head %}{% endblock head %}
 </head>
diff --git a/ht_booking/src/controllers/calendar.rs b/ht_booking/src/controllers/calendar.rs
index 3dfd478..5c6b4e2 100644
--- a/ht_booking/src/controllers/calendar.rs
+++ b/ht_booking/src/controllers/calendar.rs
@@ -93,12 +93,13 @@ pub struct CalendarPage {
     pub rows: Vec<Row>,
 }
 
-/// Resolves the UI language from the `lang` cookie (`sk` or `en`, default `en`).
+/// Resolves the UI language from the `lang` cookie. Slovak is the default;
+/// English applies only when the cookie explicitly asks for it.
 #[must_use]
 pub fn current_lang(jar: &CookieJar) -> String {
     match jar.get("lang").map(|c| c.value().to_string()) {
-        Some(ref l) if l == "sk" => "sk".to_string(),
-        _ => "en".to_string(),
+        Some(ref l) if l == "en" => "en".to_string(),
+        _ => "sk".to_string(),
     }
 }