/* ==========================================================================
   Layout CSS - Estructura, Grid/Flexbox, Header Isleño, Dock Móvil y Simulador
   ========================================================================== */

/* Contenedor Estructural de la SPA (Sticky Footer garantizado) */
.app-layout {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  width: 100%;
  flex: 1 0 auto;
}

/* Contenedores centrados con padding responsivo */
.header-wrapper {
  position: sticky;
  top: 0;
  z-index: 100;
  padding: 0.75rem 1rem 0.5rem;
  width: 100%;
  max-width: 1360px;
  margin: 0 auto;
}

.content-container,
.footer-container {
  width: 100%;
  max-width: 1360px;
  margin: 0 auto;
  padding: 0 1.25rem;
}

/* --------------------------------------------------------------------------
   Header Isleño Flotante (Redondeado y Moderno)
   -------------------------------------------------------------------------- */
.app-header {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-pill);
  box-shadow: var(--shadow-md);
  padding: 0.55rem 1.25rem;
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  transition: background-color var(--transition-normal), border-color var(--transition-normal);
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  text-decoration: none;
  flex-shrink: 0;
}

.brand-icon-wrapper {
  width: 34px;
  height: 34px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent-primary), #7C2D12);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #FFFFFF;
  flex-shrink: 0;
  box-shadow: var(--shadow-sm);
}

[data-theme="dark"] .brand-icon-wrapper {
  background: linear-gradient(135deg, var(--accent-primary), #B45309);
  color: #0C0E12;
}

.brand-icon-wrapper svg {
  width: 18px;
  height: 18px;
}

.brand-text {
  display: flex;
  flex-direction: column;
}

.brand-title {
  font-size: 1.15rem;
  color: var(--text-primary);
  margin: 0;
  line-height: 1.15;
}

.brand-subtitle {
  font-size: 0.7rem;
  color: var(--text-muted);
  letter-spacing: 0.03em;
  text-transform: uppercase;
  font-weight: 600;
  margin: 0;
}

/* Navegación Desktop Isleña */
.desktop-nav {
  display: none;
}

@media (min-width: 860px) {
  .desktop-nav {
    display: flex;
    align-items: center;
    gap: 0.25rem;
    list-style: none;
    background-color: var(--bg-surface-alt);
    padding: 0.25rem;
    border-radius: var(--radius-pill);
    border: 1px solid var(--border-subtle);
  }

  .desktop-nav .nav-link {
    padding: 0.4rem 0.9rem;
    border-radius: var(--radius-pill);
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.85rem;
    font-weight: 500;
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    transition: all var(--transition-fast);
  }

  .desktop-nav .nav-link svg {
    width: 15px;
    height: 15px;
  }

  .desktop-nav .nav-link:hover {
    color: var(--text-primary);
  }

  .desktop-nav .nav-link.active {
    background-color: var(--bg-surface);
    color: var(--accent-primary);
    font-weight: 600;
    box-shadow: var(--shadow-sm);
  }
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  flex-shrink: 0;
}

/* --------------------------------------------------------------------------
   Navbar Inferior Móvil (Dock Flotante Redondeado)
   -------------------------------------------------------------------------- */
.mobile-bottom-nav {
  position: fixed;
  bottom: 1rem;
  left: 50%;
  transform: translateX(-50%);
  width: calc(100% - 1.5rem);
  max-width: 420px;
  background-color: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-pill);
  padding: 0.35rem 0.6rem;
  box-shadow: var(--shadow-lg);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-around;
  list-style: none;
  transition: background-color var(--transition-normal), border-color var(--transition-normal);
}

@media (min-width: 860px) {
  .mobile-bottom-nav {
    display: none;
  }
}

.mobile-nav-link {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.15rem;
  padding: 0.4rem 0.65rem;
  border-radius: var(--radius-pill);
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.675rem;
  font-weight: 500;
  transition: all var(--transition-fast);
}

.mobile-nav-link svg {
  width: 18px;
  height: 18px;
}

.mobile-nav-link:active {
  transform: scale(0.92);
}

.mobile-nav-link.active {
  background-color: var(--accent-soft);
  color: var(--accent-primary);
  font-weight: 600;
}

/* --------------------------------------------------------------------------
   Contenido Principal y Vistas SPA
   -------------------------------------------------------------------------- */
.main-content {
  flex: 1 0 auto;
  padding: 1.5rem 0 5.5rem; /* Margen inferior para no tapar dock móvil */
}

@media (min-width: 860px) {
  .main-content {
    padding: 2rem 0 3rem;
  }
}

.view-section {
  display: none;
  animation: fadeIn 0.2s var(--ease-snappy);
}

.view-section.active {
  display: block;
}

@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(4px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.view-header {
  margin-bottom: 1.75rem;
}

.view-title {
  font-size: clamp(1.6rem, 3.5vw, 2.15rem);
  color: var(--text-primary);
  margin-bottom: 0.35rem;
}

.view-description {
  font-size: 0.95rem;
  color: var(--text-muted);
  max-width: 65ch;
}

/* --------------------------------------------------------------------------
   Pie de Página Institucional (Sticky al fondo)
   -------------------------------------------------------------------------- */
.app-footer {
  background-color: var(--bg-surface);
  border-top: 1px solid var(--border-color);
  padding: 1.5rem 0;
  margin-top: auto;
  font-size: 0.8rem;
  color: var(--text-muted);
}

.footer-container {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  align-items: center;
  text-align: center;
}

@media (min-width: 640px) {
  .footer-container {
    flex-direction: row;
    justify-content: space-between;
    text-align: left;
  }
}

/* --------------------------------------------------------------------------
   Simulador de Dispositivo Móvil (Academic Defense Showcase)
   Iframe sandbox de 390x844px para 100% de paridad con DevTools y móviles reales
   -------------------------------------------------------------------------- */
.device-simulator-overlay {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 99999;
  background-color: rgba(5, 7, 10, 0.88);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  align-items: center;
  justify-content: center;
  flex-direction: column;
  padding: 1.5rem 1rem;
  overflow-y: auto;
}

.device-simulator-overlay.active {
  display: flex;
  animation: fadeIn 0.2s var(--ease-snappy);
}

.simulator-phone-frame {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.75rem;
  position: relative;
  margin: auto;
}

.simulator-exit-btn {
  background-color: rgba(30, 35, 45, 0.95);
  color: #F8FAFC;
  border: 1px solid rgba(255, 255, 255, 0.2);
  padding: 0.45rem 1.15rem;
  border-radius: var(--radius-pill);
  font-family: var(--font-family-body);
  font-size: 0.825rem;
  font-weight: 600;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.4);
  transition: all var(--transition-fast);
}

.simulator-exit-btn:hover {
  background-color: #374151;
  color: #FFFFFF;
  transform: translateY(-1px);
}

.simulator-screen-bezel {
  width: 390px;
  height: 844px;
  background-color: #000000;
  border: 12px solid #1E232D;
  border-radius: 50px;
  box-shadow: 0 25px 60px -15px rgba(0, 0, 0, 0.9), 0 0 0 2px rgba(255, 255, 255, 0.1);
  overflow: hidden;
  position: relative;
  display: flex;
  flex-direction: column;
}

.simulator-dynamic-island {
  position: absolute;
  top: 10px;
  left: 50%;
  transform: translateX(-50%);
  width: 110px;
  height: 26px;
  background-color: #000000;
  border-radius: 20px;
  z-index: 100;
  pointer-events: none;
  box-shadow: 0 0 0 1px rgba(255, 255, 255, 0.05);
}

.simulator-iframe {
  width: 100%;
  height: 100%;
  border: none;
  background-color: var(--bg-primary);
}