/*
 * NNVV stylesheet entry point.
 *
 * Propshaft + stylesheet_link_tag :app auto-includes every .css file
 * under app/assets/stylesheets/ (including subdirs) as its own <link>
 * tag, in filesystem order. CSS custom properties resolve at use time,
 * so load order of _tokens.css vs consumers does not matter for var()
 * lookups. Regular cascade follows alphabetical file order.
 *
 * Do not add @import rules here — Propshaft does not rewrite @import
 * paths to fingerprinted URLs, so @import breaks in production.
 *
 * See docs/nnvv_prd.md §"CSS Architecture" and STYLE.md §"CSS".
 */