/* Header: sticky top bar, language switcher, WhatsApp CTA, mobile menu. */
#header {
  --header-h: 84px;
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--header-h);
  color: var(--grafite);
  transition: transform .45s var(--ease);
}
/* Background lives on a pseudo layer so backdrop-filter does not trap the fixed menu. */
#header::before {
  content: "";
  position: absolute;
  inset: 0;
  background: color-mix(in srgb, var(--creme) 0%, transparent);
  border-bottom: 1px solid transparent;
  transition: background .35s var(--ease), border-color .35s var(--ease), box-shadow .35s var(--ease);
  pointer-events: none;
}
#header.is-scrolled::before {
  background: color-mix(in srgb, var(--creme) 86%, transparent);
  -webkit-backdrop-filter: saturate(1.4) blur(14px);
  backdrop-filter: saturate(1.4) blur(14px);
  border-bottom-color: color-mix(in srgb, var(--caramelo-profundo) 12%, transparent);
  box-shadow: 0 10px 30px -22px color-mix(in srgb, var(--caramelo-profundo) 45%, transparent);
}
#header.is-hidden { transform: translateY(-100%); }
/* Back at the very top: drop the bar instantly so it never lingers half-faded. */
#header:not(.is-scrolled)::before { transition: none; }
#header.is-open::before { background: var(--creme); border-bottom-color: color-mix(in srgb, var(--caramelo-profundo) 12%, transparent); }

html.header-lock, html.header-lock body { overflow: hidden; }

.header-skip {
  position: absolute;
  left: 16px;
  top: 12px;
  z-index: 3;
  padding: 10px 16px;
  border-radius: 999px;
  background: var(--grafite);
  color: var(--branco);
  font-size: var(--fs-small);
  font-weight: 500;
  text-decoration: none;
  opacity: 0;
  pointer-events: none;
  transform: translateY(-8px);
  transition: opacity .2s var(--ease), transform .25s var(--ease);
}
.header-skip:focus { opacity: 1; pointer-events: auto; transform: none; }

.header-inner {
  position: relative;
  z-index: 2;
  height: 100%;
  display: flex;
  align-items: center;
  gap: 32px;
}

/* Brand */
.header-brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  flex: none;
  text-decoration: none;
  color: var(--grafite);
  border-radius: 10px;
}
.header-logo {
  display: block;
  width: auto;
  height: 30px;
}

/* Desktop nav */
.header-nav { margin-left: auto; }
.header-links {
  display: flex;
  align-items: center;
  gap: 4px;
  margin: 0;
  padding: 0;
  list-style: none;
}
.header-link {
  position: relative;
  display: inline-flex;
  align-items: center;
  height: 44px;
  padding: 0 14px;
  font-size: 15px;
  font-weight: 400;
  color: var(--grafite);
  text-decoration: none;
  border-radius: 999px;
  transition: color .25s var(--ease), background .25s var(--ease);
}
.header-link::after {
  content: "";
  position: absolute;
  left: 14px;
  right: 14px;
  bottom: 8px;
  height: 1.5px;
  background: var(--caramelo);
  transform: scaleX(0);
  transform-origin: right;
  transition: transform .4s var(--ease);
}
.header-link:hover { color: var(--caramelo-profundo); }
.header-link:hover::after,
.header-link.is-current::after { transform: scaleX(1); transform-origin: left; }
.header-link.is-current { color: var(--caramelo-profundo); font-weight: 500; }

/* Actions */
.header-actions {
  display: flex;
  align-items: center;
  gap: 12px;
  flex: none;
}

/* Language segmented control */
.header-lang {
  position: relative;
  display: inline-flex;
  padding: 3px;
  border-radius: 999px;
  background: color-mix(in srgb, var(--caramelo-claro) 55%, transparent);
  box-shadow: inset 0 0 0 1px color-mix(in srgb, var(--caramelo-profundo) 10%, transparent);
}
.header-lang-pill {
  position: absolute;
  top: 3px;
  bottom: 3px;
  left: 0;
  width: 0;
  border-radius: 999px;
  background: var(--branco);
  box-shadow: 0 1px 2px color-mix(in srgb, var(--grafite) 12%, transparent), 0 4px 10px -4px color-mix(in srgb, var(--caramelo-profundo) 35%, transparent);
  opacity: 0;
}
.header-lang.is-ready .header-lang-pill {
  opacity: 1;
  transition: transform .45s var(--ease), width .45s var(--ease);
}
.header-lang-btn {
  position: relative;
  z-index: 1;
  min-width: 40px;
  height: 34px;
  padding: 0 10px;
  border: 0;
  border-radius: 999px;
  background: transparent;
  font: 500 12.5px/1 var(--font);
  letter-spacing: .08em;
  color: var(--grafite-claro);
  cursor: pointer;
  transition: color .25s var(--ease);
}
.header-lang-btn:hover { color: var(--grafite); }
.header-lang-btn.is-active { color: var(--grafite); font-weight: 600; }
.header-lang:not(.is-ready) .header-lang-btn.is-active { background: var(--branco); }

/* WhatsApp CTA */
.header-cta {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  height: 46px;
  padding: 0 18px 0 6px;
  border-radius: 999px;
  background: var(--caramelo-profundo);
  color: var(--branco);
  font: 500 15px/1 var(--font);
  text-decoration: none;
  white-space: nowrap;
  transition: background .3s var(--ease), transform .3s var(--ease), box-shadow .3s var(--ease);
  box-shadow: 0 8px 20px -12px color-mix(in srgb, var(--caramelo-profundo) 90%, transparent);
}
.header-cta-icon {
  display: grid;
  place-items: center;
  width: 34px;
  height: 34px;
  border-radius: 50%;
  background: color-mix(in srgb, var(--branco) 16%, transparent);
  transition: background .3s var(--ease);
}
.header-cta-arrow { margin-left: -2px; transition: transform .35s var(--ease); }
.header-cta-label { display: inline-block; text-align: center; }
.header-cta:hover { background: var(--grafite); box-shadow: 0 10px 24px -12px color-mix(in srgb, var(--grafite) 80%, transparent); }
.header-cta:hover .header-cta-icon { background: var(--caramelo); }
.header-cta:hover .header-cta-arrow { transform: translateX(3px); }
.header-cta:active { transform: scale(.98); }

/* Hamburger */
.header-toggle {
  display: none;
  font-family: inherit;
  place-items: center;
  width: 46px;
  height: 46px;
  padding: 0;
  border: 0;
  border-radius: 50%;
  background: transparent;
  color: var(--grafite);
  cursor: pointer;
  box-shadow: inset 0 0 0 1px color-mix(in srgb, var(--grafite) 16%, transparent);
  transition: background .25s var(--ease);
}
.header-toggle:hover { background: color-mix(in srgb, var(--caramelo-claro) 50%, transparent); }
.header-toggle-lines { position: relative; display: block; width: 18px; height: 10px; }
.header-toggle-lines span {
  position: absolute;
  left: 0;
  width: 100%;
  height: 1.6px;
  border-radius: 2px;
  background: currentColor;
  transition: transform .4s var(--ease), top .4s var(--ease);
}
.header-toggle-lines span:first-child { top: 0; }
.header-toggle-lines span:last-child { top: 8.4px; }
#header.is-open .header-toggle-lines span:first-child { top: 4.2px; transform: rotate(45deg); }
#header.is-open .header-toggle-lines span:last-child { top: 4.2px; transform: rotate(-45deg); }

/* Mobile menu panel */
.header-menu {
  position: fixed;
  top: var(--header-h);
  left: 0;
  right: 0;
  height: calc(100dvh - var(--header-h));
  z-index: 1;
  overflow-y: auto;
  overscroll-behavior: contain;
  background: var(--creme);
  opacity: 0;
  visibility: hidden;
  transition: opacity .35s var(--ease), visibility 0s linear .35s;
}
#header.is-open .header-menu { opacity: 1; visibility: visible; transition: opacity .35s var(--ease); }
.header-menu-inner {
  min-height: 100%;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 28px;
  padding-top: 8px;
  padding-bottom: calc(28px + env(safe-area-inset-bottom));
}
.header-menu-links { margin: 0; padding: 0; list-style: none; }
.header-menu-links li {
  border-bottom: 1px solid color-mix(in srgb, var(--caramelo-profundo) 14%, transparent);
  opacity: 0;
  transform: translateY(14px);
  transition: opacity .5s var(--ease), transform .5s var(--ease);
  transition-delay: calc(.04s + var(--i) * .045s);
}
#header.is-open .header-menu-links li { opacity: 1; transform: none; }
.header-menu-links a {
  display: flex;
  align-items: baseline;
  gap: 16px;
  padding: 12px 0 11px;
  font-size: clamp(24px, 3.6vh, 30px);
  font-weight: 300;
  letter-spacing: -0.025em;
  line-height: 1.1;
  color: var(--grafite);
  text-decoration: none;
}
.header-menu-links a:active { color: var(--caramelo-profundo); }
.header-menu-num {
  min-width: 22px;
  font-size: 12px;
  font-weight: 500;
  letter-spacing: .06em;
  color: var(--caramelo-profundo);
  transform: translateY(-3px);
}
.header-menu-foot {
  display: flex;
  flex-direction: column;
  gap: 14px;
  opacity: 0;
  transform: translateY(14px);
  transition: opacity .5s var(--ease) .3s, transform .5s var(--ease) .3s;
}
#header.is-open .header-menu-foot { opacity: 1; transform: none; }
.header-menu-lang { display: flex; align-items: center; justify-content: space-between; }
.header-menu-label {
  font-size: var(--fs-eyebrow);
  font-weight: 600;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--caramelo-profundo);
}
.header-lang--lg .header-lang-btn { min-width: 52px; height: 40px; font-size: 13.5px; }
.header-menu-cta { justify-content: center; width: 100%; min-height: 56px; font-size: 17px; }
.header-menu-note {
  font-size: var(--fs-small);
  line-height: 1.5;
  color: var(--grafite-claro);
  text-align: center;
}

/* Tablet / mobile */
@media (max-width: 1240px) {
  .header-link { padding: 0 11px; }
  .header-link::after { left: 11px; right: 11px; }
}
@media (max-width: 1100px) {
  .header-nav, .header-actions > .header-lang { display: none; }
  .header-actions { margin-left: auto; }
  .header-toggle { display: grid; }
}
@media (max-width: 640px) {
  #header { --header-h: 68px; }
  .header-inner { gap: 12px; }
  .header-logo { height: 26px; }
  .header-actions { gap: 8px; }
  .header-cta { width: 46px; padding: 0; justify-content: center; }
  .header-cta-icon { width: auto; height: auto; background: none; }
  .header-cta-icon svg { width: 21px; height: 21px; }
  .header-cta-label, .header-cta-arrow { display: none; }
}

@media (prefers-reduced-motion: reduce) {
  #header, #header::before, .header-menu, .header-menu-links li, .header-menu-foot, .header-lang-pill { transition: none !important; }
}