/* ================================================
   HEADER — Navegação fixa
   ================================================ */

.header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  padding: var(--space-lg) 0;
  z-index: var(--z-sticky);
  transition: all var(--transition-base);
}

.header--scrolled {
  padding: var(--space-md) 0;
  background: rgba(10, 10, 10, 0.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--color-border);
}

.header__nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

/* ── Logo ────────────────────────────────────── */
.header__logo {
  display: flex;
  align-items: center;
  transition: opacity var(--transition-fast);
}

.header__logo-img {
  height: 70px;
  width: auto;
  object-fit: contain;
}

.header__logo:hover {
  opacity: 0.7;
}

/* ── Menu ────────────────────────────────────── */
.header__menu {
  display: flex;
  align-items: center;
  gap: var(--space-xl);
}

.header__link {
  font-size: var(--fs-sm);
  font-weight: var(--fw-medium);
  color: var(--color-text-secondary);
  letter-spacing: var(--ls-wide);
  position: relative;
  padding: var(--space-xs) 0;
  transition: color var(--transition-fast);
}

.header__link::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 1px;
  background: var(--color-white);
  transition: width var(--transition-base);
}

.header__link:hover,
.header__link--active {
  color: var(--color-text-primary);
}

.header__link:hover::after,
.header__link--active::after {
  width: 100%;
}

.header__link--cta {
  padding: 0.5rem 1.25rem;
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-sm);
  color: var(--color-text-primary);
}

.header__link--cta::after {
  display: none;
}

.header__link--cta:hover {
  background: var(--color-white);
  color: var(--color-black);
  border-color: var(--color-white);
}

/* ── Hamburger ───────────────────────────────── */
.header__hamburger {
  display: none;
  flex-direction: column;
  gap: 6px;
  width: 28px;
  padding: 4px 0;
}

.header__hamburger span {
  display: block;
  width: 100%;
  height: 1.5px;
  background: var(--color-text-primary);
  border-radius: var(--radius-full);
  transition: all var(--transition-base);
  transform-origin: center;
}

.header__hamburger--active span:nth-child(1) {
  transform: translateY(7.5px) rotate(45deg);
}

.header__hamburger--active span:nth-child(2) {
  opacity: 0;
  transform: scaleX(0);
}

.header__hamburger--active span:nth-child(3) {
  transform: translateY(-7.5px) rotate(-45deg);
}