/* ============================================================
   NAVIGATION — topbar, header, dropdown, mobile menu
   ============================================================ */

/* --- Topbar --- */
.topbar { background: var(--color-surface-dark); color: rgba(255,255,255,0.7); font-size: var(--fs-sm); }
.topbar__inner { display: flex; align-items: center; justify-content: space-between; gap: var(--space-6); min-height: 38px; }
.topbar__list { display: flex; align-items: center; gap: var(--space-6); flex-wrap: wrap; }
.topbar__item { display: inline-flex; align-items: center; gap: var(--space-2); }
.topbar__item svg { width: 15px; height: 15px; color: var(--color-brand); flex: none; }
.topbar__item a:hover { color: #fff; }
.topbar__cta { display: inline-flex; align-items: center; gap: var(--space-2); font-weight: 600; color: var(--color-brand); }
.topbar__cta:hover { color: #fff; }
.topbar__cta svg { width: 15px; height: 15px; flex: none; }
@media (max-width: 860px) { .topbar { display: none; } }

/* --- Header --- */
.header { position: sticky; top: 0; z-index: 100; background: #fff; border-bottom: 1px solid var(--color-border); transition: box-shadow var(--t-base); }
.header.is-stuck { box-shadow: var(--shadow); }
.header__inner { display: flex; align-items: center; justify-content: space-between; min-height: var(--header-h); gap: var(--space-8); }
.header__logo img { height: 56px; width: auto; }

/* --- Primary nav --- */
.nav { display: flex; align-items: center; gap: var(--space-2); }
.nav__link {
  position: relative; display: inline-flex; align-items: center; gap: var(--space-1);
  padding: var(--space-3) var(--space-4); font-weight: 500; font-size: var(--fs-base);
  color: var(--color-text-primary); border-radius: var(--radius-sm); transition: color var(--t-fast);
}
.nav__link:hover, .nav__link[aria-current="page"] { color: var(--color-brand-dark); }
.nav__link[aria-current="page"]::after {
  content: ""; position: absolute; left: var(--space-4); right: var(--space-4); bottom: 6px;
  height: 2px; background: var(--color-brand);
}
.nav__link svg { width: 16px; height: 16px; transition: transform var(--t-fast); }

/* --- Dropdown --- */
.has-dropdown { position: relative; }
.dropdown {
  position: absolute; top: calc(100% + 6px); left: 0; min-width: 280px;
  background: #fff; border: 1px solid var(--color-border); border-radius: var(--radius);
  box-shadow: var(--shadow-lg); padding: var(--space-3);
  opacity: 0; visibility: hidden; transform: translateY(8px);
  transition: opacity var(--t-base), transform var(--t-base), visibility var(--t-base);
}
.has-dropdown:hover .dropdown, .has-dropdown:focus-within .dropdown { opacity: 1; visibility: visible; transform: none; }
.has-dropdown:hover .nav__link svg { transform: rotate(180deg); }
.dropdown__link { display: flex; align-items: center; gap: var(--space-3); padding: var(--space-3) var(--space-4); border-radius: var(--radius-sm); font-size: var(--fs-sm); font-weight: 500; transition: background var(--t-fast), color var(--t-fast); }
.dropdown__link svg { width: 18px; height: 18px; color: var(--color-brand-dark); flex: none; }
.dropdown__link:hover { background: var(--color-surface-light); color: var(--color-brand-dark); }

/* --- Header actions --- */
.header__actions { display: flex; align-items: center; gap: var(--space-4); }
.header__social { display: flex; align-items: center; gap: var(--space-2); }
.header__social a { width: 30px; height: 30px; border-radius: var(--radius-sm); display: grid; place-items: center; color: var(--color-text-muted); transition: color var(--t-base); }
.header__social a:hover { color: var(--color-brand); }
.header__social svg { width: 15px; height: 15px; }

/* --- Burger --- */
.burger { display: none; width: 46px; height: 46px; border-radius: var(--radius-sm); position: relative; }
.burger span { position: absolute; left: 11px; right: 11px; height: 2px; background: var(--color-text-primary); transition: transform var(--t-base), opacity var(--t-base); }
.burger span:nth-child(1) { top: 16px; } .burger span:nth-child(2) { top: 22px; } .burger span:nth-child(3) { top: 28px; }
.burger[aria-expanded="true"] span:nth-child(1) { transform: translateY(6px) rotate(45deg); }
.burger[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.burger[aria-expanded="true"] span:nth-child(3) { transform: translateY(-6px) rotate(-45deg); }

/* --- Mobile menu --- */
.mobile-menu {
  position: fixed; inset: 0 0 0 auto; width: min(360px, 88vw); z-index: 200;
  background: var(--color-surface-dark); color: #fff; padding: var(--space-8) var(--space-6);
  transform: translateX(100%); transition: transform var(--t-base); overflow-y: auto;
  display: flex; flex-direction: column; gap: var(--space-2);
}
.mobile-menu.is-open { transform: none; }
.mobile-menu__head { display: flex; justify-content: space-between; align-items: center; margin-bottom: var(--space-6); }
.mobile-menu__close { width: 44px; height: 44px; color: #fff; font-size: 1.5rem; }
.mobile-menu a { display: block; padding: var(--space-4) var(--space-3); font-size: var(--fs-lg); font-weight: 500; border-radius: var(--radius-sm); border-bottom: 1px solid var(--color-border-dark); }
.mobile-menu a:hover { color: var(--color-brand); }
.mobile-menu__sub { padding-left: var(--space-4); }
.mobile-menu__sub a { font-size: var(--fs-base); color: var(--color-text-on-dark); border: 0; padding-block: var(--space-3); }
.mobile-menu .btn { margin-top: var(--space-6); }
.scrim { position: fixed; inset: 0; background: rgba(0,0,0,0.5); z-index: 150; opacity: 0; visibility: hidden; transition: opacity var(--t-base), visibility var(--t-base); }
.scrim.is-open { opacity: 1; visibility: visible; }

@media (max-width: 980px) {
  .nav, .header__actions .btn { display: none; }
  .burger { display: block; }
  /* Header móvel mais leve: apenas logo + menu hamburguer.
     Os ícones sociais saem do header (continuam no rodapé e no menu móvel),
     e o contacto direto fica garantido pela barra fixa "Ligar / Marcar". */
  .header__social { display: none; }
  .header__inner { min-height: 60px; gap: var(--space-4); }
  .header__logo img { height: 44px; }
}