/* ==========================================================================
   HEADER.CSS
   Encabezado fijo con logo, navegación por anclas y CTA de WhatsApp.
   ========================================================================== */

.header {
  position: fixed;
  inset-inline: 0;
  top: 0;
  z-index: 50;
  background: rgba(247, 248, 250, 0.9);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid transparent;
  transition: border-color var(--transition-base), background-color var(--transition-base);
}

/* Clase que agrega main.js cuando el usuario scrollea, para separar
   visualmente el header del contenido */
.header--scrolled {
  border-bottom-color: var(--color-line);
  background: rgba(247, 248, 250, 0.98);
}

.header__bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  padding-block: 0.85rem;
}

.header__brand {
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

.header__logo {
  height: 40px;
  width: auto;
}

.header__brand-text {
  display: flex;
  flex-direction: column;
  line-height: 1.1;
}

.header__brand-name {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.05rem;
  color: var(--color-navy);
}

.header__brand-tag {
  font-size: 0.7rem;
  letter-spacing: 0.04em;
  color: var(--color-slate);
}

.header__nav {
  display: flex;
  align-items: center;
  gap: var(--space-4);
}

.header__nav-list {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.header__nav-list a {
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--color-navy-ink);
  padding-block: 0.3rem;
  border-bottom: 2px solid transparent;
  transition: border-color var(--transition-fast), color var(--transition-fast);
}

.header__nav-list a:hover {
  color: var(--color-blue);
  border-bottom-color: var(--color-blue);
}

.header__cta {
  flex-shrink: 0;
}

/* Botón hamburguesa: sólo visible en mobile (ver responsive.css) */
.header__toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 34px;
  height: 34px;
}

.header__toggle span {
  display: block;
  height: 2px;
  background: var(--color-navy);
  border-radius: 2px;
  transition: transform var(--transition-base), opacity var(--transition-base);
}

.header--open .header__toggle span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.header--open .header__toggle span:nth-child(2) {
  opacity: 0;
}

.header--open .header__toggle span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}