/* Cabeçalho escuro e fixo: barra arredondada alinhada às bordas da hero. */
.nav{position:sticky;top:8px;z-index:40;display:flex;align-items:center;justify-content:space-between;gap:16px;margin:8px 0 12px;padding:10px 16px;border-radius:20px;background:var(--hero-bg);color:var(--hero-ink);border:1px solid rgba(255,255,255,.14);box-shadow:0 8px 24px rgba(10,10,10,.22)}
.brand{display:inline-flex;align-items:center;gap:12px;min-height:var(--touch-min);padding:0 4px;border-radius:var(--r-md);text-decoration:none;color:var(--hero-ink)}
.brand img{display:block;width:auto}
.brand__igma{height:29px;filter:brightness(0) invert(1)} /* logotipo oficial é escuro (#211E1E): vira branco por CSS, sem alterar o arquivo */
.brand__blip{height:26px}
.brand__plus{font-size:20px;line-height:1;font-weight:500}
.nav :focus-visible{outline-color:#fff}
.nav-links{display:flex;gap:4px;align-items:center;margin-left:auto;margin-right:8px}
.nav-links a{white-space:nowrap;color:var(--hero-ink);text-decoration:none;font-size:15px;font-weight:500;padding:10px 14px;border-radius:var(--r-md);min-height:var(--touch-min);display:inline-flex;align-items:center}
.nav-links a:hover{background:rgba(255,255,255,.1)}
.nav .btn-o{color:#fff;border-color:rgba(255,255,255,.55)}
.nav .btn-o:hover{border-color:#fff;background:rgba(255,255,255,.08)}
.menu{display:none}
.menu summary{list-style:none;cursor:pointer;min-height:var(--touch-min);padding:0 16px;display:inline-flex;align-items:center;border:1.5px solid rgba(255,255,255,.55);border-radius:var(--r-md);font-weight:600;font-size:14px;color:#fff}
.menu summary::-webkit-details-marker{display:none}
.menu[open] summary{border-color:#fff;background:rgba(255,255,255,.08)}
.menu nav{position:absolute;right:0;top:calc(100% + 8px);z-index:20;background:var(--hero-bg);border:1px solid rgba(255,255,255,.2);border-radius:var(--r-lg);padding:8px;display:grid;min-width:220px;box-shadow:0 12px 32px rgba(0,0,0,.35)}
.menu nav a{padding:12px 14px;border-radius:var(--r-md);color:var(--hero-ink);text-decoration:none;font-weight:500;min-height:var(--touch-min);display:flex;align-items:center}
.menu nav a:hover{background:rgba(255,255,255,.1)}
@media (max-width:1180px){.nav-links a{padding:10px 10px}.nav-links{margin-right:4px}.nav{gap:12px}}
@media (max-width:1000px){
  .nav-links{display:none}
  .menu{display:block;margin-left:auto}
  .nav .btn{display:none}
}
@media (max-width:560px){.nav{padding:8px 12px;border-radius:16px}.brand{gap:8px;padding:0}.brand__igma{height:24px}.brand__blip{height:20px}.brand__plus{font-size:16px}}
/* 320 px: logos e botão Menu cabem dentro da barra */
@media (max-width:380px){.nav{gap:8px;padding:8px 10px}.brand{gap:6px}.brand__igma{height:20px}.brand__blip{height:17px}.brand__plus{font-size:14px}.menu summary{padding:0 12px}}