The GanttEx stylesheet, shipped as colocated CSS (see GanttEx.ColocatedCSS).
All classes are prefixed with gx- and every color, size and radius is a
CSS custom property defined on .gx-root, so themes can be customized
without touching the markup:
.gx-root {
--gx-accent: #0ea5e9;
--gx-task: #0ea5e9;
--gx-task-progress: #0369a1;
--gx-radius: 4px;
}Dark mode is applied with theme="dark", or automatically with
theme="auto" (the default) when the user prefers a dark color scheme or
an ancestor has data-theme="dark".