/* ============================================================
   HEADER
   ============================================================ */
.site-header {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  transition: background .4s var(--ease), box-shadow .4s var(--ease), border-color .4s;
  border-bottom: 1px solid transparent;
}
.site-header.is-scrolled {
  background: rgba(255,255,255,.86);
  backdrop-filter: saturate(160%) blur(14px);
  border-bottom-color: var(--line);
  box-shadow: 0 6px 24px -18px rgba(8,21,64,.5);
}
.nav {
  display: flex; align-items: center; justify-content: space-between;
  height: 76px;
}
.brand { display: flex; align-items: center; gap: .7rem; }
.brand__logo { height: 22px; width: auto; }
.brand__logo--dark { display: none; }
.brand__tag {
  display:block; font-family: var(--font-mono); font-size: .58rem;
  letter-spacing: .22em; color: var(--slate-400); text-transform: uppercase;
  margin-top: 5px;
}
/* Default header sits over a dark hero: light (white) wordmark. Once scrolled,
   the header goes translucent-white, so swap to the dark wordmark for contrast. */
.site-header.is-scrolled .brand__logo--light { display: none; }
.site-header.is-scrolled .brand__logo--dark { display: block; }
.site-header.is-over-hero:not(.is-scrolled) .brand__tag { color: rgba(220,232,252,.7); }
.site-header.is-over-hero:not(.is-scrolled) .nav__link { color: rgba(233,240,252,.9); }
.site-header.is-over-hero:not(.is-scrolled) .nav__link:hover,
.site-header.is-over-hero:not(.is-scrolled) .nav__link.is-active { color: #fff; }
.site-header.is-over-hero:not(.is-scrolled) .nav-toggle span { background: #fff; }
@media (max-width: 900px){
  .site-header.is-over-hero:not(.is-scrolled) .nav__link { color: var(--slate-700); }
  .site-header.is-over-hero:not(.is-scrolled) .nav__link:hover,
  .site-header.is-over-hero:not(.is-scrolled) .nav__link.is-active { color: var(--blue-700); }
}

.nav__menu { display: flex; align-items: center; gap: 2rem; }
.nav__link {
  font-weight: 500; font-size: .96rem; color: var(--slate-700);
  position: relative; padding: .4rem 0;
  transition: color .25s;
}
.nav__link::after {
  content:""; position:absolute; left:0; bottom:-2px; height:2px; width:100%;
  background: var(--yellow); transform: scaleX(0); transform-origin: left;
  transition: transform .3s var(--ease);
}
.nav__link:hover, .nav__link.is-active { color: var(--blue-700); }
.nav__link:hover::after, .nav__link.is-active::after { transform: scaleX(1); }
.nav__actions { display: flex; align-items: center; gap: 1rem; }

.nav-toggle { display: none; width: 44px; height: 44px; flex-direction: column; gap: 5px; align-items: center; justify-content: center; }
.nav-toggle span { width: 24px; height: 2px; background: var(--ink); transition: .3s var(--ease); border-radius: 2px; }
.nav-toggle.is-open span:nth-child(1){ transform: translateY(7px) rotate(45deg); }
.nav-toggle.is-open span:nth-child(2){ opacity: 0; }
.nav-toggle.is-open span:nth-child(3){ transform: translateY(-7px) rotate(-45deg); }

.nav__menu-cta { display: none; }
.nav__backdrop {
  display: none;
}

@media (max-width: 900px) {
  .nav__menu {
    position: fixed; inset: 76px 0 auto 0;
    flex-direction: column; align-items: flex-start; gap: 0;
    background: #fff; padding: .5rem var(--gutter) calc(1.6rem + env(safe-area-inset-bottom));
    border-bottom-left-radius: 22px; border-bottom-right-radius: 22px;
    box-shadow: var(--shadow-lg);
    transform: translateY(-120%); transition: transform .45s var(--ease);
    height: auto; max-height: calc(100svh - 76px); overflow-y: auto;
    z-index: 96;
  }
  .nav__menu.is-open { transform: translateY(0); }
  .nav__link { width: 100%; padding: 1.05rem 0; border-bottom: 1px solid var(--slate-100); font-size: 1.15rem; }
  .nav__actions .btn { display: none; }
  .nav-toggle { display: flex; }

  /* CTA + WhatsApp embutidos no drawer mobile — a versão desktop some junto com .nav__actions .btn */
  .nav__menu-cta {
    display: flex; flex-direction: column; gap: .8rem;
    width: 100%; margin-top: 1.1rem; padding-top: 1.2rem;
    border-top: 1px solid var(--slate-100);
  }
  .nav__menu-wa {
    display: flex; align-items: center; justify-content: center; gap: .6rem;
    width: 100%; padding: 1rem 1.2rem; border-radius: 100px;
    background: var(--blue-50); color: var(--blue-700);
    font-weight: 600; font-size: .95rem;
  }
  .nav__menu-wa svg { width: 20px; height: 20px; flex: none; }

  /* Backdrop: escurece o conteúdo atrás do drawer, fecha ao tocar fora */
  .nav__backdrop {
    display: block; position: fixed; inset: 0; z-index: 95;
    background: rgba(8,21,64,.45); backdrop-filter: blur(2px);
    opacity: 0; pointer-events: none; transition: opacity .35s var(--ease);
  }
  .nav__backdrop.is-open { opacity: 1; pointer-events: auto; }
}

body.nav-open { overflow: hidden; }