/* ============================================================
   header.css — Header inteligente estilo "placa de fachada"
   ============================================================ */

.site-header {
  position: fixed;
  inset-block-start: 0;
  inset-inline: 0;
  z-index: var(--z-header);
  height: var(--header-h);
  display: flex;
  align-items: center;
  background-color: rgba(250, 248, 245, 0.85);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid transparent;
  transition: height var(--dur-base) var(--ease-out),
    box-shadow var(--dur-base) var(--ease-out),
    background-color var(--dur-base) var(--ease-out),
    border-color var(--dur-base) var(--ease-out),
    transform var(--dur-slow) var(--ease-out);
  will-change: transform;
}

/* Estado ao rolar: encolhe + sombra + fundo mais sólido */
.site-header.is-scrolled {
  height: var(--header-h-scrolled);
  background-color: rgba(250, 248, 245, 0.92);
  box-shadow: var(--shadow-header);
  border-bottom-color: var(--line);
}

/* Header inteligente: esconde ao descer, reaparece ao subir */
.site-header.is-hidden {
  transform: translateY(-100%);
}

.header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  width: 100%;
}

/* ---------- Marca (logo estilo placa) ---------- */
.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
}

.brand__logo {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-pill);
  object-fit: cover;
  box-shadow: var(--shadow-soft);
}

.brand__text {
  display: flex;
  flex-direction: column;
  line-height: 1.1;
}

.brand__name {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 18px;
  color: var(--teal-deep);
  letter-spacing: 0.01em;
}

.brand__place {
  font-family: var(--font-body);
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: var(--tracking-eyebrow);
  color: var(--ink-soft);
  white-space: nowrap;
}

/* ---------- Navegação desktop ---------- */
.nav {
  display: flex;
  align-items: center;
  gap: clamp(20px, 2.4vw, 36px);
}

.nav__list {
  display: flex;
  align-items: center;
  gap: clamp(14px, 1.8vw, 28px);
  flex-shrink: 0;
}

.nav__link {
  position: relative;
  display: inline-block;
  font-size: 15px;
  font-weight: 500;
  color: var(--ink);
  padding-block: 4px;
  /* impede que rótulos como "O problema" quebrem em duas linhas */
  white-space: nowrap;
  transition: color var(--dur-base) var(--ease-out);
}

.nav__link::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -2px;
  width: 100%;
  height: 2px;
  background: var(--teal-base);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--dur-base) var(--ease-out);
}

.nav__link:hover,
.nav__link.is-active {
  color: var(--teal-deep);
}

.nav__link:hover::after,
.nav__link.is-active::after {
  transform: scaleX(1);
}

.header__cta {
  display: inline-flex;
  flex-shrink: 0;
}

/* Botão do header um pouco mais compacto para caber com folga */
.header__cta .btn {
  padding: 12px 22px;
  font-size: 15px;
  white-space: nowrap;
}

/* ---------- Botão hambúrguer ---------- */
.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  border-radius: var(--radius-sm);
}

.nav-toggle__bar {
  display: block;
  width: 24px;
  height: 2px;
  margin-inline: auto;
  background-color: var(--ink);
  border-radius: 2px;
  transition: transform var(--dur-base) var(--ease-out),
    opacity var(--dur-base) var(--ease-out);
}

.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

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

.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* ---------- Menu mobile (drawer) ---------- */
.nav-backdrop {
  position: fixed;
  inset: 0;
  z-index: var(--z-header);
  background: rgba(20, 37, 43, 0.4);
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--dur-base) var(--ease-out),
    visibility var(--dur-base) var(--ease-out);
}

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