/* ==========================================================================
   Cabeçalho, navegação e drawer mobile
   O logotipo AgroTerra é preto sobre fundo claro; para preservar as cores
   originais da marca ele fica sempre sobre uma placa clara (nunca é
   recolorido, invertido ou substituído por texto).
   ========================================================================== */

.header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: var(--z-header);
  padding-top: var(--safe-t);
  transition:
    background-color var(--d-base) var(--e-out),
    box-shadow var(--d-base) var(--e-out),
    transform var(--d-base) var(--e-out);
}

.header::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(to bottom, rgba(12, 12, 9, .62), rgba(12, 12, 9, 0));
  opacity: 1;
  transition: opacity var(--d-base) var(--e-out);
  pointer-events: none;
}

.header.is-stuck {
  background: rgba(233, 233, 230, .90);
  box-shadow: 0 1px 0 var(--line), 0 12px 30px -22px rgba(20, 20, 15, .5);
}

@supports (backdrop-filter: blur(14px)) or (-webkit-backdrop-filter: blur(14px)) {
  .header.is-stuck {
    background: rgba(233, 233, 230, .74);
    -webkit-backdrop-filter: saturate(150%) blur(16px);
    backdrop-filter: saturate(150%) blur(16px);
  }
}

.header.is-stuck::before { opacity: 0; }

/* Esconde ao rolar para baixo, revela ao subir */
.header.is-hidden { transform: translate3d(0, calc(-100% * var(--motion)), 0); }

.header__inner {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--sp-4);
  height: var(--header-h);
}

/* ---- Placa do logotipo ---- */
.brandmark {
  display: inline-flex;
  align-items: center;
  flex: none;
  padding: 0.55rem 0.9rem;
  background: var(--bone);
  border-radius: var(--r-md);
  box-shadow: 0 2px 10px -4px rgba(20, 20, 15, .35);
  transition: box-shadow var(--d-base) var(--e-out), transform var(--d-base) var(--e-out);
}

.brandmark:hover { transform: translateY(calc(-1px * var(--motion))); box-shadow: var(--sh-md); }

.brandmark img {
  width: auto;
  height: 32px;
}

.header.is-stuck .brandmark { box-shadow: none; background: transparent; padding-inline: 0; }

@media (min-width: 900px) {
  .brandmark img { height: 40px; }
}

/* ---- Navegação desktop ---- */
.nav { display: none; }

@media (min-width: 1040px) {
  .nav {
    display: flex;
    align-items: center;
    gap: clamp(0.4rem, 1.2vw, 1.1rem);
  }
}

.nav__link {
  position: relative;
  padding: 0.55rem 0.2rem;
  font-size: var(--fs-sm);
  font-weight: 500;
  color: var(--tx-on-dark);
  white-space: nowrap;
  transition: color var(--d-fast) var(--e-out);
}

.nav__link::after {
  content: "";
  position: absolute;
  left: 0; right: 0; bottom: 0.1rem;
  height: 2px;
  background: var(--clay);
  transform: scaleX(0);
  transform-origin: right center;
  transition: transform var(--d-base) var(--e-out);
}

.nav__link:hover::after,
.nav__link[aria-current="true"]::after { transform: scaleX(1); transform-origin: left center; }

.header.is-stuck .nav__link { color: var(--tx); }
.header.is-stuck .nav__link:hover,
.header.is-stuck .nav__link[aria-current="true"] { color: var(--tx-strong); }
.header.is-stuck .nav__link::after { background: var(--terra); }

.header__actions { display: flex; align-items: center; gap: var(--sp-3); }
.header__cta { display: none; }

@media (min-width: 760px) { .header__cta { display: inline-flex; } }

/* ---- Botão hambúrguer ---- */
.burger {
  position: relative;
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
  width: 48px; height: 48px;
  flex: none;
  border-radius: var(--r-md);
  border: 1px solid rgba(243, 240, 232, .3);
  transition: border-color var(--d-base) var(--e-out), background-color var(--d-base) var(--e-out);
}

.header.is-stuck .burger { border-color: var(--line-strong); }

@media (min-width: 1040px) { .burger { display: none; } }

.burger__bar {
  display: block;
  width: 20px; height: 2px;
  background: var(--tx-on-dark);
  border-radius: 2px;
  transition: transform var(--d-base) var(--e-out), opacity var(--d-fast) var(--e-out), background-color var(--d-base) var(--e-out);
}

.header.is-stuck .burger__bar { background: var(--ink); }

.burger[aria-expanded="true"] .burger__bar { background: var(--ink); }
.burger[aria-expanded="true"] .burger__bar:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.burger[aria-expanded="true"] .burger__bar:nth-child(2) { opacity: 0; transform: scaleX(0); }
.burger[aria-expanded="true"] .burger__bar:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ==========================================================================
   Drawer mobile
   ========================================================================== */

.drawer {
  position: fixed;
  inset: 0;
  z-index: var(--z-drawer);
  display: grid;
  grid-template-rows: auto 1fr auto;
  background: var(--bone);
  padding:
    calc(var(--safe-t) + 1rem)
    max(var(--gutter), var(--safe-r))
    calc(var(--safe-b) + 1.5rem)
    max(var(--gutter), var(--safe-l));
  visibility: hidden;
  opacity: 0;
  transform: translate3d(0, calc(-2% * var(--motion)), 0);
  transition:
    opacity var(--d-base) var(--e-out),
    transform var(--d-base) var(--e-out),
    visibility 0s linear var(--d-base);
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
  overscroll-behavior: contain;
}

.drawer.is-open {
  visibility: visible;
  opacity: 1;
  transform: none;
  transition-delay: 0s;
}

@media (min-width: 1040px) { .drawer { display: none; } }

.drawer__top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 48px;
  margin-bottom: var(--sp-7);
}

.drawer__close {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 48px; height: 48px;
  border: 1px solid var(--line-strong);
  border-radius: var(--r-md);
  color: var(--ink);
  transition: background-color var(--d-fast) var(--e-out), color var(--d-fast) var(--e-out);
}

.drawer__close:hover { background: var(--ink); color: var(--bone); }

.drawer__nav {
  display: grid;
  gap: 0.15rem;
  align-content: start;
}

.drawer__link {
  display: flex;
  align-items: baseline;
  gap: 1rem;
  padding: 0.75rem 0;
  border-bottom: 1px solid var(--line);
  font-family: var(--ff-display);
  font-size: clamp(1.6rem, 1.15rem + 2.4vw, 2.4rem);
  font-weight: 700;
  letter-spacing: var(--tr-head);
  color: var(--tx-strong);
  opacity: 0;
  transform: translate3d(0, calc(16px * var(--motion)), 0);
  transition: opacity 420ms var(--e-soft), transform 420ms var(--e-soft), color var(--d-fast) var(--e-out);
}

.drawer.is-open .drawer__link {
  opacity: 1;
  transform: none;
  transition-delay: calc(90ms + var(--i, 0) * 55ms);
}

.drawer__link:hover { color: var(--terra); }

.drawer__link span {
  font-family: var(--ff-mono);
  font-size: 0.7rem;
  color: var(--tx-faint);
  letter-spacing: 0.1em;
}

.drawer__foot {
  display: grid;
  gap: var(--sp-4);
  padding-top: var(--sp-6);
}

.drawer__contact {
  display: grid;
  gap: 0.35rem;
  font-size: var(--fs-sm);
  color: var(--tx-mute);
}

.drawer__contact strong {
  font-family: var(--ff-display);
  font-size: var(--fs-h4);
  color: var(--tx-strong);
  letter-spacing: var(--tr-head);
}

.drawer__contact span:last-child {
  font-size: var(--fs-sm);
  color: var(--tx-mute);
  line-height: 1.5;
}