/* =============================================
   HEADER.CSS — Navegação desktop + mobile
   ============================================= */

.site-header {
  position: sticky;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background-color: var(--color-white);
  height: 72px;
  display: flex;
  align-items: center;
  transition: box-shadow var(--transition-fast);
}

.site-header.scrolled {
  box-shadow: var(--shadow-nav);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--container-px);
}

/* Logo */
.header-logo {
  display: flex;
  align-items: center;
  flex-shrink: 0;
}

.header-logo img {
  height: 44px;
  width: auto;
}

/* Nav links */
.header-nav {
  display: flex;
  align-items: center;
  gap: 36px;
}

.header-nav__link {
  font-size: 15px;
  font-weight: 500;
  color: var(--color-text-muted);
  transition: color var(--transition-fast);
  position: relative;
  padding-bottom: 2px;
}

.header-nav__link::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  right: 0;
  height: 2px;
  background-color: var(--color-primary);
  border-radius: 2px;
  transform: scaleX(0);
  transition: transform var(--transition-fast);
}

.header-nav__link:hover,
.header-nav__link.active {
  color: var(--color-primary);
}

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

/* CTA */
.header-cta {
  flex-shrink: 0;
}

/* Hamburger */
.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 8px;
  border-radius: var(--radius-sm);
  transition: background var(--transition-fast);
}

.hamburger:hover {
  background-color: var(--color-surface);
}

.hamburger span {
  display: block;
  width: 24px;
  height: 2px;
  background-color: var(--color-text);
  border-radius: 2px;
  transition: all var(--transition-fast);
}

.hamburger.open span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
.hamburger.open span:nth-child(2) {
  opacity: 0;
  transform: scaleX(0);
}
.hamburger.open span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* Mobile menu */
.mobile-menu {
  display: none;
  position: fixed;
  top: 72px;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: var(--color-white);
  z-index: 999;
  flex-direction: column;
  padding: 32px var(--container-px);
  gap: 8px;
  overflow-y: auto;
  border-top: 1px solid var(--color-border);
}

.mobile-menu.open {
  display: flex;
}

.mobile-menu__link {
  display: block;
  padding: 14px 0;
  font-size: 18px;
  font-weight: 500;
  color: var(--color-text);
  border-bottom: 1px solid var(--color-surface);
  transition: color var(--transition-fast);
}

.mobile-menu__link:hover,
.mobile-menu__link.active {
  color: var(--color-primary);
}

.mobile-menu__cta {
  margin-top: 24px;
  width: 100%;
  text-align: center;
}

/* =============================================
   RESPONSIVE
   ============================================= */

@media (max-width: 900px) {
  .header-nav,
  .header-cta {
    display: none;
  }

  .hamburger {
    display: flex;
  }

  .header-logo img {
    height: 36px;
  }
}