/* =========================================================================
   Layout — shell de la aplicación y sidebar.
   - Escritorio: sidebar fijo persistente, con colapso manual (clase
     .sidebar-collapsed en #appLayout) persistido en localStorage.
   - Tablet (<=1024px): sidebar off-canvas con overlay, controlado por
     layout.js (clase .sidebar-open).
   ========================================================================= */

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

/* -------------------------------- Sidebar -------------------------------- */
.app-sidebar {
  position: fixed;
  top: 0;
  left: 0;
  z-index: var(--z-sidebar);
  display: flex;
  flex-direction: column;
  width: var(--sidebar-width);
  height: 100vh;
  color: var(--gray-0);
  background: var(--gray-900);
  transition: transform 0.2s ease;
}

.sidebar-brand {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  width: 100%;
  min-width: 0;
  padding: var(--space-3) var(--space-3);
  color: var(--gray-0);
  text-decoration: none;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  overflow: hidden;
}

.logo-sidebar {
  display: block;
  width: 40px;
  height: 40px;
  flex-shrink: 0;
  object-fit: contain;
  border-radius: var(--radius-md);
}

.sidebar-brand .brand-text {
  min-width: 0;
  color: var(--gray-0);
  font-size: var(--text-sm);
  font-weight: 650;
  line-height: 1.2;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.sidebar-nav {
  flex: 1;
  padding: var(--space-3) var(--space-3);
  overflow-y: auto;
}

.sidebar-nav ul {
  display: flex;
  flex-direction: column;
  gap: 2px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.sidebar-section-title {
  margin: var(--space-4) var(--space-3) var(--space-1);
  color: rgba(255, 255, 255, 0.42);
  font-size: var(--text-xs);
  font-weight: 650;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.nav-link {
  position: relative;
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-3);
  color: rgba(255, 255, 255, 0.78);
  font-size: var(--text-sm);
  font-weight: 500;
  text-decoration: none;
  border-radius: var(--radius-md);
  transition: background-color 0.15s ease, color 0.15s ease;
}

.nav-link:hover {
  color: var(--gray-0);
  background: rgba(255, 255, 255, 0.08);
}

.nav-link:active {
  background: rgba(255, 255, 255, 0.12);
}

/* Estado activo: fondo blanco con texto negro. */
.nav-link.active {
  color: var(--gray-900);
  font-weight: 600;
  background: var(--gray-0);
}

.nav-icon {
  width: 16px;
  height: 16px;
  flex-shrink: 0;
}

.sidebar-footer {
  padding: var(--space-3) var(--space-4);
  color: var(--gray-0);
  border-top: 1px solid rgba(255, 255, 255, 0.08);
}

.sidebar-user-name {
  font-weight: 600;
  font-size: var(--text-sm);
}

.sidebar-user-role {
  color: rgba(255, 255, 255, 0.55);
  font-size: var(--text-xs);
}

.sidebar-footer-link,
.sidebar-reset-link {
  display: inline-block;
  margin-top: var(--space-2);
  color: rgba(255, 255, 255, 0.55);
  font-size: var(--text-xs);
  text-decoration: underline;
  background: none;
  border: 0;
  padding: 0;
}

.sidebar-footer-link:hover,
.sidebar-reset-link:hover {
  color: var(--gray-0);
}

/* ------------------------------ Contenido -------------------------------- */
.app-main {
  flex: 1;
  min-width: 0;
  margin-left: var(--sidebar-width);
  padding: var(--space-5) var(--space-5);
  transition: margin-left 0.2s ease;
}

/* --------------------------- Botón hamburguesa --------------------------- */
.sidebar-toggle {
  position: fixed;
  top: var(--space-4);
  left: var(--space-4);
  z-index: var(--z-toggle);
  display: none;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  padding: 0;
  color: var(--gray-900);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
}

.sidebar-toggle:hover {
  background: var(--surface-subtle);
}

.sidebar-toggle svg {
  width: 20px;
  height: 20px;
}

/* -------------------------------- Overlay -------------------------------- */
.sidebar-overlay {
  position: fixed;
  inset: 0;
  z-index: var(--z-overlay);
  background: rgba(0, 0, 0, 0.45);
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.2s ease, visibility 0.2s ease;
}

/* ------------------- Colapso manual en escritorio ------------------------ */
.app-layout.sidebar-collapsed .app-sidebar {
  transform: translateX(-100%);
}

.app-layout.sidebar-collapsed .app-main {
  margin-left: 0;
}

/* ------------------- Tablet: off-canvas con overlay ---------------------- */
@media (max-width: 1024px) {
  .app-sidebar {
    transform: translateX(-100%);
    box-shadow: var(--shadow-lg);
  }

  .sidebar-toggle {
    display: inline-flex;
  }

  .app-layout.sidebar-open .sidebar-toggle {
    display: none;
  }

  .app-main {
    margin-left: 0;
    padding: var(--space-6) var(--space-4) var(--space-4);
  }

  .app-layout.sidebar-open .app-sidebar {
    transform: translateX(0);
  }

  .app-layout.sidebar-open .sidebar-overlay {
    opacity: 1;
    visibility: visible;
  }
}

@media (max-width: 480px) {
  .app-main {
    padding: var(--space-5) var(--space-3) var(--space-3);
  }

  .logo-sidebar {
    width: 36px;
    height: 36px;
  }
}