/* ============================================================
   CABECERA ESTÁNDAR RESPONSIVA FIJATE.COM PARA HERRAMIENTAS
   Desktop & Mobile: Estilos globales unificados
   ============================================================ */

/* Reglas base desktop */
.app-header {
  background: var(--bg-card, #131b2e);
  border-bottom: 1px solid var(--border-color, #1e293b);
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(12px);
  width: 100%;
}

.header-container {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0.75rem 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  box-sizing: border-box;
}

.header-left {
  display: flex;
  align-items: center;
  gap: 1.25rem;
  min-width: 0;
}

.btn-back-tools {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 0.85rem;
  background: var(--bg-input, #0f172a);
  border: 1px solid var(--border-color, #1e293b);
  border-radius: var(--radius-sm, 6px);
  color: var(--text-main, #f8fafc);
  text-decoration: none;
  font-size: 0.875rem;
  font-weight: 500;
  transition: all 0.2s ease;
  white-space: nowrap;
  flex-shrink: 0;
}

.btn-back-tools:hover {
  background: var(--bg-card-header, #19243d);
  border-color: var(--primary-color, #6366f1);
  color: var(--primary-color, #6366f1);
}

.brand-area {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  min-width: 0;
}

.brand-logo-box {
  width: 40px;
  height: 40px;
  min-width: 40px;
  background: var(--primary-light, rgba(99, 102, 241, 0.15));
  border: 1px solid var(--primary-color, #6366f1);
  border-radius: var(--radius-md, 10px);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary-color, #6366f1);
  flex-shrink: 0;
}

.brand-logo-box svg {
  width: 22px;
  height: 22px;
}

.brand-info {
  display: flex;
  flex-direction: column;
  min-width: 0;
  justify-content: center;
}

.brand-title,
h1.brand-title,
h2.brand-title {
  font-family: var(--font-heading, 'Outfit', sans-serif);
  font-size: 1.15rem;
  font-weight: 700;
  line-height: 1.25;
  color: var(--text-main, #f8fafc);
  margin: 0;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.brand-subtitle,
span.brand-subtitle {
  font-size: 0.8rem;
  color: var(--text-muted, #94a3b8);
  text-transform: none !important;
  letter-spacing: 0.02em;
  line-height: 1.35;
  margin-top: 2px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex-shrink: 0;
}

.btn-icon {
  background: var(--bg-input, #0f172a);
  border: 1px solid var(--border-color, #1e293b);
  color: var(--text-main, #f8fafc);
  width: 38px;
  height: 38px;
  border-radius: var(--radius-sm, 6px);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all 0.2s ease;
}

.btn-icon:hover {
  background: var(--bg-card-header, #19243d);
  border-color: var(--primary-color, #6366f1);
  color: var(--primary-color, #6366f1);
}

/* ============================================================
   Mobile: Dispositivos de hasta 640px
   ============================================================ */
@media (max-width: 640px) {
  .app-header {
    padding: 0 !important;
    position: sticky !important;
    top: 0 !important;
    z-index: 100 !important;
  }

  .header-container {
    display: grid !important;
    grid-template-columns: 1fr auto !important;
    grid-template-rows: auto auto !important;
    grid-template-areas: 
      "nav actions"
      "brand brand" !important;
    row-gap: 0.65rem !important;
    column-gap: 0.5rem !important;
    padding: 0.65rem 0.85rem !important;
    align-items: center !important;
    width: 100% !important;
    box-sizing: border-box !important;
  }

  .header-left {
    display: contents !important;
  }

  .btn-back-tools {
    grid-area: nav !important;
    justify-self: start !important;
    padding: 0.35rem 0.65rem !important;
    font-size: 0.8rem !important;
    height: auto !important;
    display: inline-flex !important;
    align-items: center !important;
    gap: 0.35rem !important;
    white-space: nowrap !important;
  }

  .header-actions {
    grid-area: actions !important;
    justify-self: end !important;
    display: flex !important;
    align-items: center !important;
    gap: 0.5rem !important;
  }

  .brand-area {
    grid-area: brand !important;
    width: 100% !important;
    display: flex !important;
    align-items: center !important;
    gap: 0.65rem !important;
    min-width: 0 !important;
  }

  .brand-logo-box {
    width: 36px !important;
    height: 36px !important;
    min-width: 36px !important;
    flex-shrink: 0 !important;
  }

  .brand-logo-box svg {
    width: 20px !important;
    height: 20px !important;
  }

  .brand-info {
    flex: 1 1 auto !important;
    min-width: 0 !important;
    display: flex !important;
    flex-direction: column !important;
    justify-content: center !important;
    overflow: hidden !important;
  }

  .brand-title,
  h1.brand-title,
  h2.brand-title {
    font-size: 0.98rem !important;
    line-height: 1.25 !important;
    margin: 0 !important;
    word-break: normal !important;
    overflow-wrap: break-word !important;
  }

  .brand-subtitle,
  span.brand-subtitle {
    font-size: 0.72rem !important;
    line-height: 1.35 !important;
    display: block !important;
    margin-top: 2px !important;
    word-break: normal !important;
    overflow-wrap: break-word !important;
    text-transform: none !important;
  }
}

/* Pantallas extra compactas (<= 360px) */
@media (max-width: 360px) {
  .header-container {
    padding: 0.5rem 0.65rem !important;
    row-gap: 0.5rem !important;
  }

  .brand-title,
  h1.brand-title,
  h2.brand-title {
    font-size: 0.92rem !important;
  }

  .brand-subtitle,
  span.brand-subtitle {
    font-size: 0.68rem !important;
  }
}

/* Ocultar cabecera al imprimir */
@media print {
  .app-header {
    display: none !important;
  }
}