demo: layout fixes, sticky removal, style overrides, css-like rendering improvements

examples/dock/styles.glts

@@ -0,0 +1,56 @@
+$dock-bg   = #2c2c2e
+$icon-bg   = #3a3a3c
+$text      = #ffffff
+$accent    = #0a84ff
+
+Window {
+    background: #1c1c1e
+    height: 100vh
+}
+
+Panel {
+    background: transparent
+    border-width: 0px
+    padding: 0px
+    gap: 0px
+    direction: vertical
+}
+
+.wallpaper {
+    width: fill
+    height: fill
+}
+
+.dock-outer {
+    position: fixed
+    bottom: 12px
+    width: 50%
+    direction: horizontal
+    content-align: center
+    align-items: center
+}
+
+.dock {
+    direction: horizontal
+    gap: 6px
+    background: $dock-bg
+    padding: 8px 14px
+    border-radius: 16px
+    border-width: 1px
+    border-color: #444
+}
+
+.dock-icon {
+    background: $icon-bg
+    color: $text
+    font-size: 13px
+    font-weight: 600
+    padding: 6px 10px
+    border-width: 0px
+    border-radius: 8px
+}
+
+.dock-icon:hover {
+    background: $accent
+    color: #fff
+}