/* ==========================================================================
   Header — nav flutuante dividida em duas pilulas
   ========================================================================== */

.site-header {
  position: fixed;
  inset: 0 0 auto;
  z-index: var(--z-header);
  padding-block: var(--shell-pad);
  pointer-events: none;
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
}

.site-header__inner > * {
  pointer-events: auto;
}

/* Com o menu aberto o header sobe acima do overlay: o "X" de fechar
   precisa continuar nitido e clicavel. */
body[data-scroll-locked] .site-header {
  z-index: calc(var(--z-overlay) + 1);
}

/* Condensa e ganha vidro ao sair do topo. */
.site-header.is-stuck .pill {
  background: var(--surface-glass);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  backdrop-filter: saturate(180%) blur(20px);
  box-shadow: var(--shadow-md);
}

/* Entrada. */
.site-header .pill {
  opacity: 0;
  animation: drop-in var(--dur-slow) var(--ease-out) forwards;
}

.site-header__group--left .pill {
  animation-delay: 120ms;
}

.site-header__group--right .pill {
  animation-delay: 220ms;
}

/* --------------------------------------------------------------------------
   Links de navegacao
   -------------------------------------------------------------------------- */
.nav-link {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: 0.375rem;
  padding: 0.625rem 0.875rem;
  border-radius: var(--radius-pill);
  font-size: var(--fs-sm);
  font-weight: 500;
  line-height: 1;
  color: var(--ink-70);
  white-space: nowrap;
  transition:
    color var(--dur-fast) var(--ease-out),
    background-color var(--dur-fast) var(--ease-out);
}

.nav-link:hover,
.nav-link[aria-expanded="true"] {
  color: var(--ink);
  background: var(--surface-sunken);
}

.nav-link[aria-current="page"] {
  color: var(--ink);
  font-weight: 700;
}

.nav-link__caret {
  width: 0.5rem;
  height: 0.5rem;
  opacity: 0.5;
  transition: transform var(--dur-base) var(--ease-out);
}

.nav-link__caret path {
  stroke: currentColor;
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.nav-link[aria-expanded="true"] .nav-link__caret {
  transform: rotate(180deg);
}

/* --------------------------------------------------------------------------
   Dropdown de servicos
   -------------------------------------------------------------------------- */
.nav-item {
  position: relative;
}

.nav-menu {
  position: absolute;
  top: calc(100% + 0.75rem);
  left: 0;
  width: min(28rem, calc(100vw - 2 * var(--shell-pad)));
  padding: 0.5rem;
  border-radius: 1.125rem;
  background: var(--surface);
  border: 1px solid var(--line);
  box-shadow: var(--shadow-lg);
  opacity: 0;
  visibility: hidden;
  transform: translate3d(0, -0.5rem, 0) scale(0.98);
  transform-origin: top left;
  transition:
    opacity var(--dur-base) var(--ease-out),
    transform var(--dur-base) var(--ease-out),
    visibility var(--dur-base);
}

/* Submenu institucional: lista curta, largura menor. */
.nav-menu--sm {
  width: min(20rem, calc(100vw - 2 * var(--shell-pad)));
}

/* Na pilula da direita o painel ancora pela borda direita, senao ele
   escaparia da janela nos itens mais proximos do canto. */
.site-header__group--right .nav-menu {
  left: auto;
  right: 0;
  transform-origin: top right;
}

.nav-item.is-open .nav-menu {
  opacity: 1;
  visibility: visible;
  transform: translate3d(0, 0, 0) scale(1);
}

/* Abertura por hover como camada base: o menu funciona sem JavaScript. */
@media (hover: hover) {
  .nav-item:hover .nav-menu,
  .nav-item:focus-within .nav-menu {
    opacity: 1;
    visibility: visible;
    transform: translate3d(0, 0, 0) scale(1);
  }
}

.nav-menu__link {
  display: block;
  padding: 0.75rem 0.875rem;
  border-radius: 0.75rem;
  transition: background-color var(--dur-fast) var(--ease-out);
}

.nav-menu__link:hover {
  background: var(--surface-sunken);
}

.nav-menu__label {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  font-size: var(--fs-sm);
  font-weight: 700;
  line-height: 1.3;
  color: var(--ink);
}

.nav-menu__arrow {
  width: 0.75rem;
  height: 0.75rem;
  flex: none;
  opacity: 0;
  transform: translateX(-0.25rem);
  transition:
    opacity var(--dur-base) var(--ease-out),
    transform var(--dur-base) var(--ease-out);
}

.nav-menu__arrow path {
  stroke: var(--brand);
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.nav-menu__link:hover .nav-menu__arrow {
  opacity: 1;
  transform: translateX(0);
}

.nav-menu__summary {
  margin-top: 0.125rem;
  font-size: var(--fs-micro);
  line-height: 1.45;
  color: var(--ink-50);
}

/* --------------------------------------------------------------------------
   Botao hamburguer
   -------------------------------------------------------------------------- */
.burger {
  width: 2.5rem;
  height: 2.5rem;
  flex: none;
  display: grid;
  place-items: center;
  border-radius: var(--radius-pill);
  transition: background-color var(--dur-fast) var(--ease-out);
}

.burger:hover {
  background: var(--surface-sunken);
}

.burger__box {
  display: grid;
  gap: 0.3125rem;
  width: 1.0625rem;
}

.burger__bar {
  height: 1.5px;
  border-radius: 2px;
  background: var(--ink);
  transition: transform var(--dur-base) var(--ease-out), opacity var(--dur-fast) var(--ease-out);
}

.burger[aria-expanded="true"] .burger__bar:nth-child(1) {
  transform: translateY(3.25px) rotate(45deg);
}

.burger[aria-expanded="true"] .burger__bar:nth-child(2) {
  opacity: 0;
}

.burger[aria-expanded="true"] .burger__bar:nth-child(3) {
  transform: translateY(-3.25px) rotate(-45deg);
}

/* --------------------------------------------------------------------------
   Menu mobile em folha
   -------------------------------------------------------------------------- */
.sheet {
  position: fixed;
  inset: 0;
  z-index: var(--z-overlay);
  display: grid;
  align-items: start;
  padding: calc(var(--header-h) + 2 * var(--shell-pad)) var(--shell-pad) var(--shell-pad);
  background: rgba(16, 16, 18, 0.28);
  -webkit-backdrop-filter: blur(6px);
  backdrop-filter: blur(6px);
  opacity: 0;
  visibility: hidden;
  transition:
    opacity var(--dur-base) var(--ease-out),
    visibility var(--dur-base);
}

.sheet.is-open {
  opacity: 1;
  visibility: visible;
}

.sheet__panel {
  max-height: 100%;
  overflow-y: auto;
  overscroll-behavior: contain;
  padding: 1.25rem;
  border-radius: var(--radius-card);
  background: var(--surface);
  box-shadow: var(--shadow-lg);
  transform: translate3d(0, -1rem, 0);
  transition: transform var(--dur-slow) var(--ease-out);
}

.sheet.is-open .sheet__panel {
  transform: translate3d(0, 0, 0);
}

.sheet__list {
  display: grid;
  gap: 0.125rem;
}

.sheet__item {
  opacity: 0;
}

.sheet.is-open .sheet__item {
  animation: rise-in var(--dur-slow) var(--ease-out) forwards;
  animation-delay: calc(80ms + var(--i, 0) * 45ms);
}

.sheet__link {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.75rem 0.25rem;
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.2;
  border-bottom: 1px solid var(--line);
}

.sheet__index {
  font-family: var(--font-sans);
  font-size: var(--fs-micro);
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--ink-50);
}

.sheet__sublist {
  display: grid;
  gap: 0.125rem;
  padding: 0.5rem 0 0.25rem 0.25rem;
}

.sheet__sublink {
  display: block;
  padding: 0.4375rem 0;
  font-size: var(--fs-sm);
  font-weight: 500;
  color: var(--ink-50);
  transition: color var(--dur-fast) var(--ease-out);
}

.sheet__sublink:hover {
  color: var(--brand-strong);
}

.sheet__footer {
  display: grid;
  gap: 1rem;
  margin-top: 1.5rem;
}

.sheet__contact {
  display: grid;
  gap: 0.25rem;
  font-size: var(--fs-sm);
  color: var(--ink-70);
}

.sheet__contact a:hover {
  color: var(--brand-strong);
}

/* --------------------------------------------------------------------------
   Alternancia mobile / desktop
   -------------------------------------------------------------------------- */
.site-header__desktop {
  display: none;
}

.nav-list {
  display: flex;
  align-items: center;
  gap: 0.125rem;
}

@media (min-width: 64rem) {
  .site-header__desktop {
    display: block;
  }

  .site-header__mobile {
    display: none;
  }

  .sheet {
    display: none;
  }
}