html {
  font-size: 14px;
}

@media (min-width: 768px) {
  html {
    font-size: 16px;
  }
}

.btn:focus, .btn:active:focus, .btn-link.nav-link:focus, .form-control:focus, .form-check-input:focus {
  box-shadow: 0 0 0 0.1rem white, 0 0 0 0.25rem #258cfb;
}

html {
  position: relative;
  min-height: 100%;
}

.form-floating > .form-control-plaintext::placeholder, .form-floating > .form-control::placeholder {
  color: var(--bs-secondary-color);
  text-align: end;
}

.form-floating > .form-control-plaintext:focus::placeholder, .form-floating > .form-control:focus::placeholder {
  text-align: start;
}

/* ===================== Layout con sidebar ===================== */

:root {
  --sidebar-ancho: 260px;
  --sidebar-fondo: #1f2430;
  --sidebar-texto: #c3c9d5;
  --sidebar-activo: #b71c1c;
}

body {
  margin-bottom: 0;
}

.app-sidebar {
  position: fixed;
  top: 0;
  left: 0;
  bottom: 0;
  width: var(--sidebar-ancho);
  background: var(--sidebar-fondo);
  color: var(--sidebar-texto);
  overflow-y: auto;
  z-index: 1040;
  transition: transform .2s ease-in-out;
}

.app-sidebar .sidebar-marca {
  display: flex;
  align-items: center;
  gap: .5rem;
  padding: 1rem 1.25rem;
  color: #fff;
  font-size: 1.15rem;
  font-weight: 600;
  text-decoration: none;
  border-bottom: 1px solid rgba(255, 255, 255, .08);
}

.app-sidebar .sidebar-marca:hover {
  color: #fff;
}

.app-sidebar .nav-link {
  color: var(--sidebar-texto);
  padding: .55rem 1.25rem;
  display: flex;
  align-items: center;
  gap: .6rem;
  border-left: 3px solid transparent;
}

.app-sidebar .nav-link:hover {
  color: #fff;
  background: rgba(255, 255, 255, .06);
}

/* Cabecera de cada modulo desplegable */
.app-sidebar .modulo-toggle {
  width: 100%;
  background: none;
  border: 0;
  text-align: left;
  font-size: .78rem;
  letter-spacing: .04em;
  text-transform: uppercase;
  color: #8b93a5;
  padding: .7rem 1.25rem .45rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.app-sidebar .modulo-toggle:hover {
  color: #fff;
}

.app-sidebar .modulo-toggle .chevron {
  transition: transform .15s ease-in-out;
  font-size: .7rem;
}

.app-sidebar .modulo-toggle[aria-expanded="true"] .chevron {
  transform: rotate(90deg);
}

/* Item dentro de un modulo */
.app-sidebar .submenu .nav-link {
  padding-left: 2.5rem;
  font-size: .92rem;
}

.app-sidebar .nav-link.activo {
  color: #fff;
  background: rgba(255, 255, 255, .10);
  border-left-color: var(--sidebar-activo);
  font-weight: 500;
}

.app-contenido {
  margin-left: var(--sidebar-ancho);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.app-topbar {
  background: #fff;
  border-bottom: 1px solid #dee2e6;
  padding: .6rem 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.app-main {
  flex: 1;
  padding: 1.5rem;
}

.app-footer {
  border-top: 1px solid #dee2e6;
  padding: .75rem 1.5rem;
  color: #6c757d;
  font-size: .875rem;
}

.sidebar-backdrop {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, .5);
  z-index: 1039;
}

/* --------- Responsive: el sidebar se oculta y se despliega --------- */
@media (max-width: 991.98px) {
  .app-sidebar {
    transform: translateX(-100%);
  }

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

  .app-contenido {
    margin-left: 0;
  }

  .sidebar-backdrop.visible {
    display: block;
  }
}