/* dlang.org-flavored theme shared by the DMD explorer (index.html) and its tour (tour.html). A D-red header sits over neutral surfaces in both a light and a dark variant; subtle gradients, no colored glows. The palette mirrors dlang.org/css (maroon #b03931/#98312a, gray surfaces, blue/red/gray code). :root holds the light theme. The dark theme overrides the same tokens under [data-theme="dark"], which theme.js sets on (defaulting to the OS prefers-color-scheme, overridable by the top-bar toggle). All page chrome and code colors are tokens, so toggling re-themes both pages live. Tokens live here; page-specific layout stays in each file's own