/* ===========================================================
   Cabeçalho fixo + navegação responsiva
   =========================================================== */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  transition:
    background-color 0.25s ease,
    box-shadow 0.25s ease,
    backdrop-filter 0.25s ease;
  background: linear-gradient(
    to bottom,
    rgba(20, 18, 16, 0.55),
    rgba(20, 18, 16, 0)
  );
}
.site-header.is-scrolled {
  background: rgba(255, 255, 255, 0.92);
  box-shadow: 0 1px 0 rgba(0, 0, 0, 0.07);
  backdrop-filter: saturate(1.4) blur(12px);
}
.site-header.is-scrolled.menu-open {
  backdrop-filter: none;
  transition: auto;
}
.site-header__bar {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 24px;
  height: var(--header-h);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

/* Logo */
.brand {
  display: flex;
  align-items: center;
  gap: 11px;
  text-decoration: none;
  color: #fff;
  transition: color 0.25s ease;
}
.site-header.is-scrolled .brand,
.site-header.is-scrolled .nav__link,
.site-header.is-scrolled .nav__btn {
  color: var(--ink);
}
.brand__mark {
  width: 34px;
  height: 34px;
  border-radius: 9px;
  background: var(--brand);
  display: flex;
  align-items: center;
  justify-content: center;
  flex: none;
}
.brand__mark span {
  display: block;
  width: 13px;
  height: 13px;
  border: 3px solid #fff;
  border-radius: 50%;
}
.brand__name {
  display: flex;
  flex-direction: column;
  line-height: 1.05;
}
.brand__name b {
  font-weight: 800;
  font-size: 15px;
  letter-spacing: 0.06em;
}
.brand__name small {
  font-weight: 500;
  font-size: 9.5px;
  letter-spacing: 0.16em;
  opacity: 0.7;
  white-space: nowrap;
}

/* Navegação desktop */
.nav {
  display: flex;
  align-items: center;
  gap: 4px;
}
.nav__item {
  position: relative;
}
.nav__link,
.nav__btn {
  display: flex;
  align-items: center;
  gap: 6px;
  background: none;
  border: none;
  cursor: pointer;
  font-family: inherit;
  font-weight: 600;
  font-size: 14px;
  letter-spacing: 0.02em;
  color: #fff;
  text-decoration: none;
  padding: 10px 14px;
  border-radius: 10px;
}
.nav__caret {
  display: block;
  width: 6px;
  height: 6px;
  border-right: 2px solid currentColor;
  border-bottom: 2px solid currentColor;
  transform: rotate(45deg);
  margin-top: -3px;
  opacity: 0.7;
}
.nav__cta {
  margin-left: 10px;
}

/* Dropdown */
.nav__menu {
  position: absolute;
  top: 100%;
  left: 0;
  min-width: 208px;
  padding: 8px;
  background: #fff;
  border-radius: 14px;
  box-shadow: var(--shadow-pop);
  border: 1px solid rgba(0, 0, 0, 0.06);
  display: flex;
  flex-direction: column;
}
.nav__menu a {
  padding: 11px 14px;
  border-radius: 9px;
  text-decoration: none;
  color: #3a3631;
  font-weight: 500;
  font-size: 14px;
  background: none;
  border: none;
  cursor: pointer;
  text-align: left;
  font-family: inherit;
}
.nav__menu a:hover {
  background: var(--bg);
  color: var(--brand);
}

/* Botão hambúrguer */
.nav-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
  color: #fff;
}
.site-header.is-scrolled .nav-toggle {
  color: var(--ink);
}
.nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: currentColor;
  border-radius: 2px;
}
.nav-toggle span + span {
  margin-top: 6px;
}

/* Menu mobile em tela cheia */
.mobile-menu {
  position: fixed;
  inset: 0;
  z-index: 1100;
  background: var(--charcoal);
  color: #fff;
  display: flex;
  flex-direction: column;
  padding: 20px 24px 40px;
  transform: translateY(-100%);
  opacity: 0;
  pointer-events: none;
  transition:
    transform 0.32s cubic-bezier(0.4, 0, 0.2, 1),
    opacity 0.32s ease;
}
.mobile-menu.is-open {
  transform: translateY(0);
  opacity: 1;
  pointer-events: auto;
}
.mobile-menu__top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 52px;
}
.mobile-menu__close {
  background: none;
  border: none;
  cursor: pointer;
  color: #fff;
  font-size: 30px;
  line-height: 1;
  padding: 4px 8px;
}
.mobile-menu__group {
  margin-top: 18px;
  display: flex;
  flex-direction: column;
}
.mobile-menu__label {
  font-size: 12px;
  letter-spacing: 0.18em;
  color: #8a847a;
  font-weight: 600;
  padding: 18px 4px 8px;
}
.mobile-menu__link {
  padding: 14px 4px;
  font-size: 20px;
  font-weight: 600;
  color: #fff;
  text-decoration: none;
  background: none;
  border: none;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  text-align: left;
  cursor: pointer;
  font-family: inherit;
}
.mobile-menu__cta {
  margin-top: auto;
  text-align: center;
}

@media (max-width: 920px) {
  .nav {
    display: none;
  }
  .nav-toggle {
    display: block;
  }
}