Let the slider controls take their colours from the slider in 1.11.3

Dots, arrows, counter and button background are style properties of the
slider ("Slider-Steuerung"), written as custom properties onto the slider and
onto the control bar the script places after it, so the script-free markers
and the scripted controls share the same colours.

Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>

src/Content/StyleCompiler.php

@@ -185,6 +185,12 @@ final class StyleCompiler
             if ('' !== $images) {
                 $rules .= sprintf('#%s img{%s}', $id, $images);
             }
+            // Slider colours: on the slider for the script-free markers, and on the control bar
+            // the script places right after it.
+            $controls = $this->declarations($values, 'controls', $device);
+            if ('' !== $controls) {
+                $rules .= sprintf('#%s,#%s + .slider-controls{%s}', $id, $id, $controls);
+            }
             $hover = is_array($values['hover'] ?? null) ? $this->declarations($values['hover'], 'self', $device) : '';
             if ('' !== $hover) {
                 $rules .= sprintf('#%s:hover,#%s:focus-within{%s}', $id, $id, $hover);