/* =====================================================
   COMPONENTE: HEADER
   Estructura principal del header sticky y brand/logo
   ===================================================== */

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-light);
  box-shadow: var(--shadow-xs);
  transition: var(--transition-base);
}

.site-header.scrolled {
  background: rgba(255, 255, 255, 0.98);
  box-shadow: var(--shadow-sm);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 20px;
}

/* =====================================================
   MARCA / LOGO
   ===================================================== */
.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  transition: var(--transition-transform);
}

.brand:hover {
  transform: translateY(-2px);
}

.brand-logo {
  width: 45px;
  height: 45px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-md);
  overflow: hidden;
  background: var(--bg-light);
}

.brand-logo img {
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.brand-title {
  font-weight: 900;
  font-size: 1.25rem;
  letter-spacing: 0.5px;
  color: var(--primary);
}

/* =====================================================
   BURGER BUTTON
   ===================================================== */
.burger {
  display: inline-flex;
  background: transparent;
  border: 2px solid var(--primary);
  color: var(--primary);
  font-size: 1.5rem;
  padding: 8px 12px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: var(--transition-base);
  position: relative;
  overflow: hidden;
  z-index: 1;
}

/* Efecto de fondo animado */
.burger::before {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--primary);
  transform: translateY(100%);
  transition: var(--transition-base);
  z-index: -1;
}

.burger:hover::before {
  transform: translateY(0);
}

.burger:hover {
  color: var(--white);
  transform: rotate(90deg);
  box-shadow: var(--shadow-md);
}

/* Click feedback */
.burger:active {
  transform: rotate(90deg) scale(0.95);
}

/* Cuando el menú está abierto */
.burger.open {
  background: var(--primary);
  color: var(--white);
  transform: rotate(90deg);
}

/* Focus state para accesibilidad */
.burger:focus-visible {
  outline: 3px solid var(--ring);
  outline-offset: 2px;
}

/* =====================================================
   RESPONSIVE
   ===================================================== */
@media (max-width: 768px) {
  .header-inner {
    padding: 10px 15px;
  }

  .brand {
    gap: 8px;
  }

  .brand-title {
    font-size: 1.1rem;
  }

  .brand-logo {
    width: 38px;
    height: 38px;
  }

  .burger {
    padding: 6px 10px;
    font-size: 1.3rem;
  }
}

@media (max-width: 480px) {
  .brand-title {
    font-size: 1rem;
  }
  
  .brand-logo {
    width: 35px;
    height: 35px;
  }
}