/* ============================================================
   HEADER.CSS — Cabecera fija y navegación por anclas
   ============================================================ */

/* --- HEADER PRINCIPAL --- */
.site-header {
  position: sticky;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  height: var(--header-height);
  background: rgba(255, 255, 255, 0.90);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: var(--border-base);
  transition: box-shadow var(--transition-base), background var(--transition-base);
}

/* Sombra al hacer scroll */
.site-header.is-scrolled {
  box-shadow: var(--shadow-md);
  background: rgba(255, 255, 255, 0.97);
}

/* --- INNER LAYOUT --- */
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  gap: var(--space-6);
}

/* --- LOGO --- */
.site-logo {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  text-decoration: none;
  flex-shrink: 0;
}

.site-logo__icon {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-md);
  background: var(--color-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.site-logo__icon svg {
  width: 24px;
  height: 24px;
  color: var(--color-white);
}

.site-logo__text {
  display: flex;
  flex-direction: column;
  line-height: 1.15;
}

.site-logo__name {
  font-family: var(--font-heading);
  font-size: var(--text-md);
  font-weight: var(--weight-bold);
  color: var(--color-gray-900);
  letter-spacing: -0.02em;
}

.site-logo__tagline {
  font-size: var(--text-xs);
  color: var(--color-primary);
  font-weight: var(--weight-medium);
  letter-spacing: 0.04em;
}

/* --- NAVEGACIÓN DESKTOP --- */
.site-nav {
  display: flex;
  align-items: center;
  gap: var(--space-1);
}

.nav-link {
  font-size: var(--text-sm);
  font-weight: var(--weight-medium);
  color: var(--color-gray-600);
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-sm);
  transition: color var(--transition-fast), background var(--transition-fast);
  white-space: nowrap;
}

.nav-link:hover,
.nav-link.is-active {
  color: var(--color-primary);
  background: var(--color-primary-bg);
}

/* --- CTA HEADER --- */
.header-cta {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  flex-shrink: 0;
}

.header-phone {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-sm);
  font-weight: var(--weight-semibold);
  color: var(--color-gray-700);
  text-decoration: none;
  transition: color var(--transition-fast);
}

.header-phone:hover {
  color: var(--color-primary);
}

.header-phone svg {
  width: 16px;
  height: 16px;
  color: var(--color-primary);
}

/* --- RESPONSIVE: TABLET (≤ 900px) — Compactar nav --- */
@media (max-width: 900px) {
  .site-nav {
    gap: 0;
  }

  .nav-link {
    font-size: var(--text-xs);
    padding: var(--space-2);
  }

  .header-phone {
    display: none;
  }
}

/* --- RESPONSIVE: MÓVIL (≤ 640px) — Ocultar nav, dejar solo logo + CTA --- */
@media (max-width: 640px) {
  .site-nav {
    display: none;
  }

  .site-logo__tagline {
    display: none;
  }

  .header-cta .btn {
    font-size: var(--text-xs);
    padding: var(--space-2) var(--space-4);
  }
}

/* --- BARRA DE PROGRESO DE SCROLL --- */
.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  width: 0%;
  height: 3px;
  background: linear-gradient(90deg, var(--color-primary), var(--color-accent));
  z-index: 1001;
  transition: width 100ms linear;
  border-radius: 0 var(--radius-full) var(--radius-full) 0;
}