/* Site DTF — the Site's pages: the home, one page per product and the cart.
   They share this document, so artworks already loaded in the browser survive
   moving between them; each page has its own address, so Back, Forward, reload
   and shared links behave as in any store. nginx serves index.html for these
   addresses. Loaded in <head> so the right page is the first one painted;
   site-steps.js does the navigation. */
const PAGINAS={file:'/arquivo-por-metro', avulsa:'/artes-avulsas',
               uvfile:'/uv-arquivo-por-metro', uv:'/uv-artes-avulsas'};
const CARRINHO='/carrinho';
function paginaDe(caminho){
  caminho=caminho.replace(/\/+$/,'')||'/';
  if(caminho===CARRINHO) return {pagina:'carrinho'};
  const m=Object.keys(PAGINAS).find(k=>PAGINAS[k]===caminho);
  return m ? {pagina:'produto',modo:m} : {pagina:'inicio'};
}
// Older portal links open a quote on the home address; quotes live in the cart.
if(location.pathname==='/' && new URLSearchParams(location.search).has('quote'))
  history.replaceState(null,'',CARRINHO+location.search);
document.documentElement.dataset.rota=paginaDe(location.pathname).pagina;