.site-header {
  position: fixed;
  inset: 0 0 auto;
  z-index: 50;
  height: var(--header-h);
  background: rgba(255, 255, 255, 0);
  border-bottom: 1px solid transparent;
  transition:
    height var(--dur-2) var(--ease-out),
    background-color var(--dur-2) var(--ease-out),
    border-color var(--dur-2) var(--ease-out);
}

.site-header.is-compact {
  height: var(--header-h-compact);
  background: #fff;
  border-bottom-color: var(--line);
}

/* Sem JS não há como saber se rolou: o cabeçalho já nasce com fundo. */
html:not(.js) .site-header {
  background: #fff;
  border-bottom-color: var(--line);
}

.site-header__inner {
  display: flex;
  align-items: center;
  gap: 32px;
  height: 100%;
}

.site-header__logo {
  flex: none;
  display: block;
}

.site-header__logo img {
  width: auto;
  height: 26px;
  transition: height var(--dur-2) var(--ease-out);
}

.is-compact .site-header__logo img {
  height: 22px;
}

/* Navegação do desktop */
.site-nav {
  margin-left: auto;
}

.site-nav__list {
  display: flex;
  align-items: center;
  gap: 4px;
}

.site-nav__item {
  position: relative;
}

.site-nav__link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  height: 40px;
  padding: 0 14px;
  border-radius: 999px;
  font-size: var(--fs-14);
  font-weight: 500;
  text-decoration: none;
  color: var(--ink);
  transition: background-color var(--dur-1) var(--ease-out);
}

.site-nav__link:hover {
  background: var(--surface);
}

.site-nav__link[aria-current="page"] {
  color: var(--accent);
}

.site-nav__chevron {
  transition: transform var(--dur-2) var(--ease-out);
}

/* Painel de Serviços: abre no hover e no foco, sem depender de JS */
.nav-menu {
  position: absolute;
  top: calc(100% + 10px);
  left: -16px;
  width: 440px;
  padding: 10px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  box-shadow: 0 24px 48px -24px rgba(16, 15, 12, 0.22);
  opacity: 0;
  visibility: hidden;
  transform: translateY(-6px);
  transition:
    opacity var(--dur-2) var(--ease-out),
    transform var(--dur-2) var(--ease-out),
    visibility 0s linear var(--dur-2);
}

/* Ponte invisível para o mouse não perder o hover no vão */
.nav-menu::before {
  content: "";
  position: absolute;
  inset: -12px 0 auto;
  height: 12px;
}

.site-nav__item--menu:hover .nav-menu,
.site-nav__item--menu:focus-within .nav-menu,
.site-nav__item--menu.is-open .nav-menu {
  opacity: 1;
  visibility: visible;
  transform: none;
  transition-delay: 0s;
}

.site-nav__item--menu:hover .site-nav__chevron,
.site-nav__item--menu:focus-within .site-nav__chevron,
.site-nav__item--menu.is-open .site-nav__chevron {
  transform: rotate(180deg);
}

.site-nav__item--menu.is-closed .nav-menu {
  opacity: 0;
  visibility: hidden;
}

.nav-menu__link {
  display: grid;
  grid-template-columns: 28px 1fr;
  gap: 8px;
  padding: 12px 14px;
  border-radius: var(--radius);
  text-decoration: none;
  transition: background-color var(--dur-1) var(--ease-out);
}

.nav-menu__link:hover,
.nav-menu__link:focus-visible {
  background: var(--surface);
}

.nav-menu__num {
  padding-top: 2px;
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  color: var(--ink-3);
}

.nav-menu__text {
  display: grid;
  gap: 2px;
}

.nav-menu__text strong {
  font-size: var(--fs-14);
  font-weight: 600;
}

.nav-menu__text span {
  font-size: var(--fs-13);
  line-height: 1.45;
  color: var(--ink-2);
}

.nav-menu__all {
  display: flex;
  justify-content: space-between;
  margin-top: 6px;
  padding: 14px;
  border-top: 1px solid var(--line);
  font-size: var(--fs-13);
  font-weight: 600;
  text-decoration: none;
}

.nav-menu__all:hover {
  color: var(--accent);
}

/* Menu do celular: <details>, funciona sem JS */
.mobile-menu {
  display: none;
}

@media (max-width: 960px) {
  .site-nav,
  .site-header__cta {
    display: none;
  }

  .mobile-menu {
    display: block;
    margin-left: auto;
  }

  .site-header__logo img {
    height: 22px;
  }

  .mobile-menu__toggle {
    position: relative;
    z-index: 2;
    display: grid;
    place-items: center;
    width: 44px;
    height: 44px;
    margin-right: -10px;
    list-style: none;
    cursor: pointer;
  }

  .mobile-menu__toggle::-webkit-details-marker {
    display: none;
  }

  .mobile-menu__bars {
    display: grid;
    gap: 6px;
    width: 22px;
  }

  .mobile-menu__bars span {
    display: block;
    height: 1.5px;
    background: var(--ink);
    transition: transform var(--dur-2) var(--ease-out);
  }

  .mobile-menu[open] .mobile-menu__bars span:first-child {
    transform: translateY(3.75px) rotate(45deg);
  }

  .mobile-menu[open] .mobile-menu__bars span:last-child {
    transform: translateY(-3.75px) rotate(-45deg);
  }

  .mobile-menu__panel {
    position: fixed;
    inset: 0;
    z-index: 1;
    display: flex;
    flex-direction: column;
    padding: calc(var(--header-h) + 24px) var(--gutter) max(24px, env(safe-area-inset-bottom));
    background: #fff;
    overflow-y: auto;
  }

  .mobile-menu[open] .mobile-menu__panel {
    animation: mobile-menu-in var(--dur-2) var(--ease-out);
  }

  .mobile-menu__list > li {
    border-bottom: 1px solid var(--line);
  }

  .mobile-menu__list > li > a {
    display: block;
    padding: 18px 0;
    font-size: var(--fs-32);
    font-weight: 600;
    letter-spacing: var(--tracking-title);
    text-decoration: none;
  }

  .mobile-menu__list a[aria-current="page"] {
    color: var(--accent);
  }

  .mobile-menu__sub {
    display: grid;
    gap: 2px;
    padding-bottom: 18px;
    margin-top: -6px;
  }

  .mobile-menu__sub a {
    display: block;
    padding: 8px 0;
    font-size: var(--fs-16);
    color: var(--ink-2);
    text-decoration: none;
  }

  .mobile-menu__foot {
    display: grid;
    gap: 10px;
    margin-top: auto;
    padding-top: 32px;
  }

  .mobile-menu__foot .btn {
    --btn-h: 54px;
  }

  /* Header fica por cima do painel aberto */
  .site-header:has(.mobile-menu[open]) {
    background: #fff;
  }

  .site-header:has(.mobile-menu[open]) .site-header__logo {
    position: relative;
    z-index: 2;
  }
}

@keyframes mobile-menu-in {
  from {
    opacity: 0;
    transform: translateY(-8px);
  }
}