Replace button-styled trigger with plain text + dashed underline.
Dialog positions as a popover hanging below the backlog name instead
of a centered modal. Transparent backdrop, click-outside-to-close.

diff --git a/src/bin/ranger/commands/serve.rs b/src/bin/ranger/commands/serve.rs
index b719374..6134b28 100644
--- a/src/bin/ranger/commands/serve.rs
+++ b/src/bin/ranger/commands/serve.rs
@@ -148,9 +148,22 @@ async fn render_board(state: &AppState, backlog_name: &str) -> color_eyre::Resul
                     h1 {
                         "ranger" span.sep { "›" }
                         @if backlog_names.len() > 1 {
-                            select.backlog-select onchange="window.location.href='/b/'+this.value" {
-                                @for name in &backlog_names {
-                                    option value=(name) selected[name == backlog_name] { (name) }
+                            span.backlog-picker {
+                                button.backlog-trigger onclick="document.getElementById('backlog-dialog').show()" {
+                                    (backlog_name)
+                                    span.backlog-caret { "▾" }
+                                }
+                                dialog #backlog-dialog {
+                                    ul.backlog-list {
+                                        @for name in &backlog_names {
+                                            li {
+                                                a.backlog-option class=@if name == backlog_name { "active" }
+                                                  href=(format!("/b/{name}")) {
+                                                    (name)
+                                                }
+                                            }
+                                        }
+                                    }
                                 }
                             }
                         } @else {
@@ -278,6 +291,13 @@ fn keyboard_nav_script() -> Markup {
         script {
             (PreEscaped(r#"
             (function() {
+                // Close backlog popover on outside click
+                document.addEventListener('click', function(e) {
+                    var dialog = document.getElementById('backlog-dialog');
+                    if (dialog && dialog.open && !dialog.contains(e.target) && !e.target.closest('.backlog-trigger')) {
+                        dialog.close();
+                    }
+                });
                 function getFocusables() {
                     return Array.from(document.querySelectorAll(
                         'details.task > summary, div.task'
diff --git a/static/style.css b/static/style.css
index dac912e..4bd7aec 100644
--- a/static/style.css
+++ b/static/style.css
@@ -94,26 +94,81 @@ header h1 .sep {
 }
 
 /* === Backlog selector === */
-.backlog-select {
-  font-family: var(--font-sans);
-  font-size: var(--step-0);
-  font-weight: 600;
-  color: var(--color-text-header);
-  background: rgba(255, 255, 255, 0.1);
-  border: 1px solid rgba(255, 255, 255, 0.2);
-  border-radius: 4px;
-  padding: 2px 6px;
+.backlog-picker {
+  position: relative;
+  display: inline-block;
+}
+
+.backlog-trigger {
+  font-family: inherit;
+  font-size: inherit;
+  font-weight: inherit;
+  color: inherit;
+  background: none;
+  border: none;
   cursor: pointer;
-  outline: none;
+  padding: 0;
+  border-bottom: 1px dashed rgba(255, 255, 255, 0.3);
 }
 
-.backlog-select:hover {
-  background: rgba(255, 255, 255, 0.15);
+.backlog-trigger:hover {
+  border-bottom-color: rgba(255, 255, 255, 0.6);
 }
 
-.backlog-select option {
-  color: #333;
-  background: #fff;
+.backlog-caret {
+  font-size: 0.6em;
+  opacity: 0.4;
+  margin-left: 2px;
+}
+
+/* === Backlog popover === */
+dialog {
+  border: none;
+  border-radius: 6px;
+  padding: 0;
+  background: #2e3036;
+  color: var(--color-text);
+  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.4);
+  min-width: 180px;
+  margin: 0;
+  position: absolute;
+  top: 100%;
+  left: 0;
+  margin-top: 6px;
+}
+
+dialog::backdrop {
+  background: transparent;
+}
+
+dialog[open] {
+  display: block;
+}
+
+.dialog-header {
+  display: none;
+}
+
+.backlog-list {
+  list-style: none;
+  padding: 4px;
+}
+
+.backlog-option {
+  display: block;
+  padding: 6px 12px;
+  color: var(--color-text);
+  text-decoration: none;
+  border-radius: 4px;
+  font-size: var(--step-0);
+}
+
+.backlog-option:hover {
+  background: rgba(255, 255, 255, 0.1);
+}
+
+.backlog-option.active {
+  color: var(--color-accent);
 }
 
 header .counts {