/* ============================================================
   PLATAFORMA "MI MUNDO ESOTÉRICO" - APP SHELL & TAB NAVIGATION
   ============================================================ */

/* Shell Contenedor de la Aplicación */
.app-container {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  max-width: 1400px;
  margin: 0 auto;
}

/* Cabecera Fija de la App */
.app-header {
  background: rgba(20, 14, 36, 0.95);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-color);
  padding: 12px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  position: sticky;
  top: 0;
  z-index: 100;
}

.app-brand {
  display: flex;
  align-items: center;
  gap: 12px;
}

.app-logo {
  width: 42px;
  height: 42px;
  background: radial-gradient(circle, var(--color-gold) 0%, var(--color-purple-dark) 100%);
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.4rem;
  box-shadow: var(--purple-glow);
  border: 1px solid var(--color-gold);
}

.app-title {
  font-size: 1.3rem;
  font-family: var(--font-title);
  color: var(--color-gold-light);
  margin: 0;
  letter-spacing: 1px;
}

.app-user-bar {
  display: flex;
  align-items: center;
  gap: 20px;
}

.credits-badge {
  background: rgba(223, 177, 91, 0.15);
  border: 1px solid var(--color-gold);
  border-radius: var(--radius-full);
  padding: 6px 16px;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--color-gold-light);
  display: flex;
  align-items: center;
  gap: 6px;
}

.notification-btn {
  position: relative;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  color: var(--color-gold-light);
  width: 40px;
  height: 40px;
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  font-size: 1.1rem;
  transition: var(--transition);
}

.notification-btn:hover {
  background: var(--bg-card-hover);
  border-color: var(--color-gold);
}

.notification-badge-count {
  position: absolute;
  top: -4px;
  right: -4px;
  background: #ef4444;
  color: white;
  font-size: 0.7rem;
  font-weight: 800;
  width: 18px;
  height: 18px;
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
}

/* MENÚ DE NAVEGACIÓN POR PESTAÑAS */
.app-tabs-nav {
  background: rgba(12, 9, 20, 0.98);
  border-bottom: 1px solid var(--border-color);
  padding: 0 20px;
  display: flex;
  align-items: center;
  gap: 8px;
  overflow-x: auto;
  white-space: nowrap;
  scrollbar-width: thin;
  scrollbar-color: var(--color-gold) transparent;
}

.app-tabs-nav::-webkit-scrollbar {
  height: 4px;
}
.app-tabs-nav::-webkit-scrollbar-thumb {
  background: var(--color-gold);
  border-radius: var(--radius-full);
}

.tab-item {
  padding: 14px 20px;
  font-family: var(--font-title);
  font-size: 0.9rem;
  color: var(--text-muted);
  background: transparent;
  border: none;
  border-bottom: 3px solid transparent;
  cursor: pointer;
  transition: var(--transition);
  display: flex;
  align-items: center;
  gap: 8px;
  text-transform: uppercase;
  letter-spacing: 0.8px;
}

.tab-item:hover {
  color: var(--color-gold-light);
  background: rgba(223, 177, 91, 0.05);
}

.tab-item.active {
  color: var(--color-gold-light);
  border-bottom-color: var(--color-gold);
  background: rgba(223, 177, 91, 0.1);
  font-weight: 700;
  text-shadow: 0 0 10px rgba(223, 177, 91, 0.4);
}

/* ÁREA PRINCIPAL DE CONTENIDO (VIEWPORT PESTAÑAS) */
.app-viewport {
  flex: 1;
  padding: 24px;
  max-width: 1280px;
  width: 100%;
  margin: 0 auto;
}

.tab-pane {
  display: none;
  animation: fadeIn 0.35s ease-in-out;
}

.tab-pane.active {
  display: block;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

/* MODALES INTERNOS */
.modal-backdrop {
  position: fixed;
  top: 0; left: 0; right: 0; bottom: 0;
  background: rgba(8, 5, 15, 0.85);
  backdrop-filter: blur(8px);
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  opacity: 0;
  pointer-events: none;
  transition: var(--transition);
}

.modal-backdrop.active {
  opacity: 1;
  pointer-events: auto;
}

.modal-window {
  background: var(--bg-modal);
  border: 1px solid var(--color-gold);
  border-radius: var(--radius-lg);
  width: 100%;
  max-width: 650px;
  max-height: 90vh;
  overflow-y: auto;
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.8), var(--border-glow);
  padding: 30px;
  position: relative;
  transform: scale(0.92);
  transition: var(--transition);
}

.modal-backdrop.active .modal-window {
  transform: scale(1);
}

.modal-close {
  position: absolute;
  top: 20px;
  right: 20px;
  background: transparent;
  border: none;
  color: var(--text-muted);
  font-size: 1.4rem;
  cursor: pointer;
  transition: var(--transition);
}

.modal-close:hover {
  color: var(--color-gold);
}

/* Pie de página compacto */
.app-footer {
  background: rgba(12, 9, 20, 0.95);
  border-top: 1px solid var(--border-color);
  padding: 16px 24px;
  text-align: center;
  font-size: 0.85rem;
  color: var(--text-dim);
  margin-top: auto;
}

/* Adaptación Responsive */
@media (max-width: 768px) {
  .app-header {
    padding: 10px 14px;
  }
  .app-title {
    font-size: 1.1rem;
  }
  .credits-badge {
    padding: 4px 10px;
    font-size: 0.75rem;
  }
  .tab-item {
    padding: 12px 14px;
    font-size: 0.8rem;
  }
  .app-viewport {
    padding: 16px 10px;
  }
}