/* ==========================================================================
   AAR OS — Layout Adaptativo MD3 (Navigation Rail / Navigation Bar)
   ========================================================================== */

.app-shell {
  display: flex;
  min-height: 100vh;
}

/* Navigation Rail (Escritorio >= 840px) */
.nav-rail {
  display: none;
  flex-direction: column;
  align-items: center;
  width: 84px;
  padding: var(--espacio-4) var(--espacio-2);
  background-color: var(--md-sys-color-surface-container);
  border-right: 1px solid var(--md-sys-color-outline-variant);
  position: fixed;
  inset: 0 auto 0 0;
  z-index: 20;
  gap: var(--espacio-3);
}

.nav-rail__marca {
  width: 48px;
  height: 48px;
  border-radius: var(--md-sys-shape-corner-large);
  background: var(--md-sys-color-primary-container);
  color: var(--md-sys-color-on-primary-container);
  display: grid;
  place-items: center;
  font-weight: 700;
  font-size: 0.95rem;
  margin-bottom: var(--espacio-4);
}

.nav-rail__lista {
  display: flex;
  flex-direction: column;
  gap: var(--espacio-3);
  width: 100%;
  flex: 1;
}

.nav-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  padding: 6px 4px;
  color: var(--md-sys-color-on-surface-variant);
  font-size: 0.75rem;
  font-weight: 500;
  border-radius: var(--md-sys-shape-corner-medium);
  transition: background-color var(--md-sys-motion-duration) var(--md-sys-motion-standard);
  cursor: pointer;
  border: none;
  background: transparent;
  width: 100%;
}

.nav-item__pildora {
  width: 56px;
  height: 32px;
  border-radius: var(--md-sys-shape-corner-full);
  display: grid;
  place-items: center;
  transition: background-color var(--md-sys-motion-duration) var(--md-sys-motion-standard);
}

.nav-item:hover .nav-item__pildora {
  background-color: var(--md-sys-color-surface-container-highest);
}

.nav-item.activo {
  color: var(--md-sys-color-on-surface);
  font-weight: 600;
}

.nav-item.activo .nav-item__pildora {
  background-color: var(--md-sys-color-secondary-container);
  color: var(--md-sys-color-on-secondary-container);
}

/* Contenido principal */
.app-contenido {
  flex: 1;
  display: flex;
  flex-direction: column;
  width: 100%;
  padding-bottom: 84px; /* Espacio para Navigation Bar móvil */
}

.top-app-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--espacio-4);
  padding: var(--espacio-3) var(--espacio-4);
  background-color: var(--md-sys-color-surface);
  border-bottom: 1px solid var(--md-sys-color-outline-variant);
  position: sticky;
  top: 0;
  z-index: 15;
}

.top-app-bar__titulo {
  margin: 0;
  font-size: 1.35rem;
  font-weight: 600;
  letter-spacing: -0.01em;
}

.top-app-bar__acciones {
  display: flex;
  align-items: center;
  gap: var(--espacio-2);
}

.contenedor-pagina {
  width: 100%;
  max-width: 1240px;
  margin: 0 auto;
  padding: var(--espacio-4);
  display: flex;
  flex-direction: column;
  gap: var(--espacio-4);
}

/* Rejillas adaptativas */
.grid-metricas {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: var(--espacio-4);
}

.grid-dos-columnas {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--espacio-4);
}

/* Navigation Bar (Móvil < 840px) */
.nav-bar {
  position: fixed;
  inset: auto 0 0 0;
  height: 76px;
  background-color: var(--md-sys-color-surface-container);
  border-top: 1px solid var(--md-sys-color-outline-variant);
  display: flex;
  justify-content: space-around;
  align-items: center;
  padding: 0 var(--espacio-2);
  z-index: 20;
}

/* Pantalla centrada para Login */
.login-contenedor {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: var(--espacio-4);
  background: radial-gradient(
    circle at top right,
    var(--md-sys-color-primary-container) 0%,
    var(--md-sys-color-surface) 55%
  );
}

.login-card {
  width: 100%;
  max-width: 420px;
}

@media (min-width: 840px) {
  .nav-rail {
    display: flex;
  }

  .nav-bar {
    display: none;
  }

  .app-contenido {
    margin-left: 84px;
    padding-bottom: var(--espacio-6);
  }

  .contenedor-pagina {
    padding: var(--espacio-6);
    gap: var(--espacio-6);
  }

  .grid-dos-columnas {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}