/* Shared brand layer for every page: tokens plus the "ac" site bar. Prefixed to avoid clashing with page styles. */
:root{--brand-ink:#273e35;--brand-paper:#f3f3ed;--brand-card:#fffefa;--brand-muted:#627267;--brand-accent:#2d5546;--brand-accent-soft:#456c57;--brand-rule:#dce2d7;--brand-focus:#b4773d;--brand-serif:Georgia,"Times New Roman",serif;--brand-sans:"Segoe UI",system-ui,sans-serif}
.site-bar{display:flex;justify-content:space-between;align-items:center;gap:16px 20px;flex-wrap:wrap;padding:20px clamp(20px,4vw,64px);border-bottom:1px solid var(--brand-rule);background:var(--brand-paper);color:var(--brand-ink);font:13px/1.5 var(--brand-sans)}
.site-brand{display:flex;align-items:center;gap:10px;color:var(--brand-ink);font-weight:600;font-size:15px;text-decoration:none}
.site-mark{display:grid;place-items:center;flex:none;width:35px;height:35px;border-radius:10px;background:var(--brand-accent);color:#fff;font:21px/1 var(--brand-serif)}
.site-nav{display:flex;flex-wrap:wrap;gap:8px 22px}
.site-nav a{color:var(--brand-ink);text-underline-offset:4px}
.site-nav a:hover{color:var(--brand-accent)}
.site-bar a:focus-visible{outline:3px solid var(--brand-focus);outline-offset:4px}
@media print{.site-bar{display:none}}
/* Bilingual content: both copies live in the page, only the active one shows. */
html[data-lang="en"] [lang="pt"]:not(html),html[data-lang="pt"] [lang="en"]:not(html){display:none!important}
.lang-switch{display:inline-flex;flex:none;border:1px solid var(--brand-rule);border-radius:999px;overflow:hidden;background:var(--brand-card)}
.lang-switch button{font:600 11px/1 var(--brand-sans);letter-spacing:.08em;padding:7px 11px;border:0;background:transparent;color:var(--brand-muted);cursor:pointer}
.lang-switch button[aria-pressed="true"]{background:var(--brand-accent);color:#fff}
.lang-switch button:focus-visible{outline:3px solid var(--brand-focus);outline-offset:-3px}
.site-tools{display:flex;align-items:center;flex-wrap:wrap;gap:12px 22px}
@media print{.lang-switch{display:none}}