/* ============================================================================
   app.css - Sistema de diseño del Sistema de Cobros (v2)
   Reemplaza Tailwind CDN. Un solo archivo, cacheable, consistente en todo el
   sistema. Estructura: variables > base > layout > componentes > utilidades.
   ============================================================================ */

:root {
  /* Paleta */
  --c-primario: #4f46e5;
  --c-primario-osc: #4338ca;
  --c-primario-suave: #eef2ff;
  --c-exito: #059669;
  --c-exito-suave: #ecfdf5;
  --c-peligro: #dc2626;
  --c-peligro-suave: #fef2f2;
  --c-alerta: #d97706;
  --c-alerta-suave: #fffbeb;
  --c-info: #0284c7;
  --c-info-suave: #f0f9ff;

  /* Neutros */
  --c-fondo: #f3f4f6;
  --c-superficie: #ffffff;
  --c-borde: #e5e7eb;
  --c-texto: #111827;
  --c-texto-2: #4b5563;
  --c-texto-3: #9ca3af;

  /* Sidebar */
  --sb-fondo: #111827;
  --sb-fondo-hover: #1f2937;
  --sb-texto: #d1d5db;
  --sb-activo: #4f46e5;
  --sb-ancho: 250px;

  --radio: 10px;
  --radio-sm: 7px;
  --sombra: 0 1px 3px rgba(17, 24, 39, .07), 0 1px 2px rgba(17, 24, 39, .04);
  --sombra-md: 0 6px 16px rgba(17, 24, 39, .10);
  --fuente: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
}

*, *::before, *::after { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  font-family: var(--fuente);
  font-size: 14.5px;
  line-height: 1.55;
  color: var(--c-texto);
  background: var(--c-fondo);
}

h1, h2, h3, h4 { margin: 0 0 .5rem; line-height: 1.25; }
p { margin: 0 0 .75rem; }
a { color: var(--c-primario); text-decoration: none; }
a:hover { text-decoration: underline; }
img { max-width: 100%; }

/* ============================== LAYOUT ==================================== */

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

/* --- Sidebar --- */
.sidebar {
  position: fixed;
  inset: 0 auto 0 0;
  width: var(--sb-ancho);
  background: var(--sb-fondo);
  color: var(--sb-texto);
  display: flex;
  flex-direction: column;
  z-index: 50;
  transition: transform .25s ease;
}

.sidebar-marca {
  display: flex;
  align-items: center;
  gap: .75rem;
  padding: 1.1rem 1.25rem;
  border-bottom: 1px solid rgba(255, 255, 255, .08);
}

.sidebar-marca .logo {
  width: 38px; height: 38px;
  border-radius: 9px;
  background: var(--c-primario);
  display: flex; align-items: center; justify-content: center;
  color: #fff; font-size: 1.1rem;
  flex-shrink: 0;
}

.sidebar-marca strong { color: #fff; display: block; font-size: .95rem; line-height: 1.2; }
.sidebar-marca small { color: var(--c-texto-3); font-size: .72rem; }

.sidebar-nav { flex: 1; overflow-y: auto; padding: .9rem .7rem; }

.sidebar-nav .grupo {
  font-size: .68rem;
  text-transform: uppercase;
  letter-spacing: .08em;
  color: #6b7280;
  padding: .9rem .6rem .35rem;
}

.sidebar-nav a {
  display: flex;
  align-items: center;
  gap: .7rem;
  padding: .58rem .75rem;
  margin-bottom: 2px;
  border-radius: var(--radio-sm);
  color: var(--sb-texto);
  font-weight: 500;
  font-size: .875rem;
}

.sidebar-nav a i { width: 1.15rem; text-align: center; font-size: .95rem; opacity: .85; }
.sidebar-nav a:hover { background: var(--sb-fondo-hover); color: #fff; text-decoration: none; }
.sidebar-nav a.activo { background: var(--sb-activo); color: #fff; }

.sidebar-pie {
  padding: .9rem 1rem;
  border-top: 1px solid rgba(255, 255, 255, .08);
}

.sidebar-usuario { display: flex; align-items: center; gap: .65rem; margin-bottom: .6rem; }
.sidebar-usuario .avatar {
  width: 36px; height: 36px; border-radius: 50%;
  background: var(--sb-fondo-hover);
  display: flex; align-items: center; justify-content: center;
  color: #fff; font-weight: 600; font-size: .85rem;
  flex-shrink: 0;
}
.sidebar-usuario .nombre { color: #fff; font-size: .82rem; font-weight: 600; line-height: 1.2; }
.sidebar-usuario .rol { color: var(--c-texto-3); font-size: .7rem; }

/* --- Contenido --- */
.principal {
  flex: 1;
  margin-left: var(--sb-ancho);
  min-width: 0;
  display: flex;
  flex-direction: column;
}

.topbar {
  background: var(--c-superficie);
  border-bottom: 1px solid var(--c-borde);
  padding: .8rem 1.5rem;
  display: flex;
  align-items: center;
  gap: 1rem;
  position: sticky;
  top: 0;
  z-index: 30;
}

.topbar h1 { font-size: 1.15rem; margin: 0; }
.topbar .sub { color: var(--c-texto-3); font-size: .8rem; }
.topbar .acciones { margin-left: auto; display: flex; gap: .5rem; align-items: center; }

.btn-menu {
  display: none;
  background: none; border: none; cursor: pointer;
  font-size: 1.2rem; color: var(--c-texto-2);
  padding: .3rem .5rem;
}

.contenido { padding: 1.5rem; flex: 1; }

/* Overlay móvil */
.overlay-sidebar {
  display: none;
  position: fixed; inset: 0;
  background: rgba(17, 24, 39, .5);
  z-index: 40;
}

@media (max-width: 900px) {
  .sidebar { transform: translateX(-100%); }
  body.sidebar-abierto .sidebar { transform: translateX(0); }
  body.sidebar-abierto .overlay-sidebar { display: block; }
  .principal { margin-left: 0; }
  .btn-menu { display: block; }
  .contenido { padding: 1rem; }
}

/* ============================== COMPONENTES =============================== */

/* --- Tarjetas --- */
.card {
  background: var(--c-superficie);
  border: 1px solid var(--c-borde);
  border-radius: var(--radio);
  box-shadow: var(--sombra);
  margin-bottom: 1.25rem;
}

.card-cabecera {
  display: flex;
  align-items: center;
  gap: .75rem;
  padding: 1rem 1.25rem;
  border-bottom: 1px solid var(--c-borde);
  flex-wrap: wrap;
}

.card-cabecera h2 { font-size: 1rem; margin: 0; }
.card-cabecera .acciones { margin-left: auto; display: flex; gap: .5rem; flex-wrap: wrap; }
.card-cuerpo { padding: 1.25rem; }

/* --- Tarjetas de estadística (KPI) --- */
.grid-stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(215px, 1fr));
  gap: 1rem;
  margin-bottom: 1.25rem;
}

.stat {
  background: var(--c-superficie);
  border: 1px solid var(--c-borde);
  border-radius: var(--radio);
  box-shadow: var(--sombra);
  padding: 1.1rem 1.25rem;
  display: flex;
  align-items: center;
  gap: 1rem;
}

.stat .icono {
  width: 46px; height: 46px;
  border-radius: 12px;
  display: flex; align-items: center; justify-content: center;
  font-size: 1.15rem;
  flex-shrink: 0;
}

.stat .etiqueta { color: var(--c-texto-2); font-size: .78rem; font-weight: 500; }
.stat .valor { font-size: 1.45rem; font-weight: 700; line-height: 1.2; }
.stat .detalle { color: var(--c-texto-3); font-size: .72rem; }

.icono-primario { background: var(--c-primario-suave); color: var(--c-primario); }
.icono-exito    { background: var(--c-exito-suave);    color: var(--c-exito); }
.icono-peligro  { background: var(--c-peligro-suave);  color: var(--c-peligro); }
.icono-alerta   { background: var(--c-alerta-suave);   color: var(--c-alerta); }
.icono-info     { background: var(--c-info-suave);     color: var(--c-info); }

/* --- Botones --- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: .45rem;
  padding: .55rem 1rem;
  border-radius: var(--radio-sm);
  border: 1px solid transparent;
  font-family: inherit;
  font-size: .855rem;
  font-weight: 600;
  cursor: pointer;
  white-space: nowrap;
  transition: background .15s, border-color .15s, color .15s, box-shadow .15s;
}

.btn:hover { text-decoration: none; }
.btn:disabled { opacity: .55; cursor: not-allowed; }

.btn-primario { background: var(--c-primario); color: #fff; }
.btn-primario:hover { background: var(--c-primario-osc); color: #fff; }
.btn-exito { background: var(--c-exito); color: #fff; }
.btn-exito:hover { background: #047857; color: #fff; }
.btn-peligro { background: var(--c-peligro); color: #fff; }
.btn-peligro:hover { background: #b91c1c; color: #fff; }
.btn-secundario {
  background: var(--c-superficie);
  color: var(--c-texto-2);
  border-color: var(--c-borde);
}
.btn-secundario:hover { background: var(--c-fondo); color: var(--c-texto); }
.btn-fantasma { background: transparent; color: var(--c-texto-2); }
.btn-fantasma:hover { background: var(--c-fondo); }

.btn-sm { padding: .35rem .65rem; font-size: .78rem; }
.btn-icono {
  width: 32px; height: 32px; padding: 0;
  border-radius: var(--radio-sm);
}
.btn-bloque { width: 100%; }

/* --- Formularios --- */
.form-grupo { margin-bottom: 1rem; }

.form-etiqueta {
  display: block;
  font-size: .8rem;
  font-weight: 600;
  color: var(--c-texto-2);
  margin-bottom: .35rem;
}

.form-etiqueta .req { color: var(--c-peligro); }

.form-control, select.form-control, textarea.form-control {
  width: 100%;
  padding: .55rem .8rem;
  font-family: inherit;
  font-size: .9rem;
  color: var(--c-texto);
  background: var(--c-superficie);
  border: 1px solid var(--c-borde);
  border-radius: var(--radio-sm);
  transition: border-color .15s, box-shadow .15s;
}

.form-control:focus {
  outline: none;
  border-color: var(--c-primario);
  box-shadow: 0 0 0 3px rgba(79, 70, 229, .12);
}

.form-control.invalido { border-color: var(--c-peligro); }
.form-error { color: var(--c-peligro); font-size: .75rem; margin-top: .25rem; display: none; }
.form-error.visible { display: block; }
.form-ayuda { color: var(--c-texto-3); font-size: .75rem; margin-top: .25rem; }

textarea.form-control { resize: vertical; min-height: 70px; }

.form-fila {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(190px, 1fr));
  gap: .9rem;
}

.check {
  display: inline-flex; align-items: center; gap: .5rem;
  font-size: .85rem; cursor: pointer;
}

/* --- Tablas --- */
.tabla-envoltura { overflow-x: auto; }

.tabla { width: 100%; border-collapse: collapse; font-size: .855rem; }

.tabla th {
  text-align: left;
  padding: .65rem .9rem;
  background: #f9fafb;
  color: var(--c-texto-2);
  font-size: .72rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: .04em;
  border-bottom: 1px solid var(--c-borde);
  white-space: nowrap;
}

.tabla td {
  padding: .7rem .9rem;
  border-bottom: 1px solid var(--c-borde);
  vertical-align: middle;
}

.tabla tbody tr:hover { background: #f9fafb; }
.tabla .num { text-align: right; font-variant-numeric: tabular-nums; }
.tabla .acciones-fila { display: flex; gap: .35rem; }

/* --- Badges --- */
.badge {
  display: inline-flex;
  align-items: center;
  gap: .3rem;
  padding: .18rem .6rem;
  border-radius: 999px;
  font-size: .72rem;
  font-weight: 600;
  white-space: nowrap;
}

.badge-exito   { background: var(--c-exito-suave);   color: var(--c-exito); }
.badge-peligro { background: var(--c-peligro-suave); color: var(--c-peligro); }
.badge-alerta  { background: var(--c-alerta-suave);  color: var(--c-alerta); }
.badge-info    { background: var(--c-info-suave);    color: var(--c-info); }
.badge-neutro  { background: var(--c-fondo);         color: var(--c-texto-2); }
.badge-primario{ background: var(--c-primario-suave);color: var(--c-primario); }

/* --- Alertas --- */
.alerta {
  display: flex;
  align-items: flex-start;
  gap: .7rem;
  padding: .85rem 1.1rem;
  border-radius: var(--radio-sm);
  border: 1px solid;
  margin-bottom: 1rem;
  font-size: .875rem;
}

.alerta i { margin-top: .15rem; }
.alerta-exito   { background: var(--c-exito-suave);   border-color: #a7f3d0; color: #065f46; }
.alerta-error   { background: var(--c-peligro-suave); border-color: #fecaca; color: #991b1b; }
.alerta-alerta  { background: var(--c-alerta-suave);  border-color: #fde68a; color: #92400e; }
.alerta-info    { background: var(--c-info-suave);    border-color: #bae6fd; color: #075985; }

/* --- Modales --- */
.modal-fondo {
  position: fixed; inset: 0;
  background: rgba(17, 24, 39, .55);
  display: none;
  align-items: flex-start;
  justify-content: center;
  padding: 2.5rem 1rem;
  z-index: 100;
  overflow-y: auto;
}

.modal-fondo.abierto { display: flex; }

.modal {
  background: var(--c-superficie);
  border-radius: var(--radio);
  box-shadow: var(--sombra-md);
  width: 100%;
  max-width: 520px;
  animation: modal-entrada .18s ease-out;
}

.modal-lg { max-width: 720px; }

@keyframes modal-entrada {
  from { opacity: 0; transform: translateY(-12px); }
  to   { opacity: 1; transform: translateY(0); }
}

.modal-cabecera {
  display: flex;
  align-items: center;
  gap: .7rem;
  padding: 1rem 1.25rem;
  border-bottom: 1px solid var(--c-borde);
}

.modal-cabecera h3 { font-size: 1rem; margin: 0; flex: 1; }
.modal-cerrar {
  background: none; border: none; cursor: pointer;
  color: var(--c-texto-3); font-size: 1.1rem;
  padding: .25rem .4rem; border-radius: var(--radio-sm);
}
.modal-cerrar:hover { background: var(--c-fondo); color: var(--c-texto); }

.modal-cuerpo { padding: 1.25rem; }
.modal-pie {
  display: flex;
  justify-content: flex-end;
  gap: .6rem;
  padding: 1rem 1.25rem;
  border-top: 1px solid var(--c-borde);
}

/* --- Toasts (notificaciones flotantes) --- */
#toasts {
  position: fixed;
  top: 1rem; right: 1rem;
  z-index: 200;
  display: flex;
  flex-direction: column;
  gap: .55rem;
  max-width: 360px;
}

.toast {
  display: flex;
  align-items: flex-start;
  gap: .6rem;
  padding: .8rem 1rem;
  background: var(--c-superficie);
  border: 1px solid var(--c-borde);
  border-left: 4px solid var(--c-info);
  border-radius: var(--radio-sm);
  box-shadow: var(--sombra-md);
  font-size: .855rem;
  animation: toast-entrada .25s ease-out;
}

.toast-exito { border-left-color: var(--c-exito); }
.toast-exito i { color: var(--c-exito); }
.toast-error { border-left-color: var(--c-peligro); }
.toast-error i { color: var(--c-peligro); }
.toast-alerta { border-left-color: var(--c-alerta); }
.toast-alerta i { color: var(--c-alerta); }

@keyframes toast-entrada {
  from { opacity: 0; transform: translateX(30px); }
  to   { opacity: 1; transform: translateX(0); }
}

.toast.saliendo { opacity: 0; transition: opacity .3s; }

/* --- Pestañas --- */
.pestanas {
  display: flex;
  gap: .25rem;
  border-bottom: 2px solid var(--c-borde);
  margin-bottom: 1.1rem;
  overflow-x: auto;
}

.pestana {
  padding: .6rem 1rem;
  font-size: .875rem;
  font-weight: 600;
  color: var(--c-texto-2);
  border: none;
  border-bottom: 2px solid transparent;
  margin-bottom: -2px;
  background: none;
  cursor: pointer;
  white-space: nowrap;
}

.pestana:hover { color: var(--c-texto); }
.pestana.activa { color: var(--c-primario); border-bottom-color: var(--c-primario); }

.panel-pestana { display: none; }
.panel-pestana.activo { display: block; }

/* --- Paginación --- */
.paginacion {
  display: flex;
  align-items: center;
  gap: .3rem;
  flex-wrap: wrap;
  padding: 1rem 1.25rem;
}

.paginacion .info { color: var(--c-texto-3); font-size: .8rem; margin-right: auto; }

.paginacion a, .paginacion span.actual {
  padding: .35rem .7rem;
  border-radius: var(--radio-sm);
  border: 1px solid var(--c-borde);
  font-size: .8rem;
  color: var(--c-texto-2);
  background: var(--c-superficie);
}

.paginacion a:hover { background: var(--c-fondo); text-decoration: none; }
.paginacion span.actual { background: var(--c-primario); border-color: var(--c-primario); color: #fff; font-weight: 600; }

/* --- Estados vacíos --- */
.estado-vacio { text-align: center; padding: 3rem 1.5rem; color: var(--c-texto-3); }
.estado-vacio .icono {
  width: 64px; height: 64px;
  margin: 0 auto 1rem;
  border-radius: 50%;
  background: var(--c-fondo);
  display: flex; align-items: center; justify-content: center;
  font-size: 1.5rem;
}
.estado-vacio h3 { color: var(--c-texto-2); font-size: .95rem; }
.estado-vacio p { font-size: .83rem; margin: 0 0 1rem; }

/* --- Autocompletado --- */
.autocompletar { position: relative; }

.autocompletar-lista {
  position: absolute;
  top: calc(100% + 4px);
  left: 0; right: 0;
  background: var(--c-superficie);
  border: 1px solid var(--c-borde);
  border-radius: var(--radio-sm);
  box-shadow: var(--sombra-md);
  max-height: 230px;
  overflow-y: auto;
  z-index: 60;
  display: none;
}

.autocompletar-lista.abierta { display: block; }

.autocompletar-item {
  padding: .6rem .85rem;
  cursor: pointer;
  border-bottom: 1px solid var(--c-fondo);
  font-size: .855rem;
}

.autocompletar-item:hover, .autocompletar-item.marcado { background: var(--c-primario-suave); }
.autocompletar-item small { color: var(--c-texto-3); display: block; }

/* --- Carga --- */
.spinner {
  width: 18px; height: 18px;
  border: 2.5px solid rgba(255, 255, 255, .35);
  border-top-color: #fff;
  border-radius: 50%;
  animation: girar .7s linear infinite;
  display: inline-block;
}

.spinner-oscuro { border-color: var(--c-borde); border-top-color: var(--c-primario); }

@keyframes girar { to { transform: rotate(360deg); } }

/* --- Gráficos --- */
.grafico-envoltura { position: relative; height: 290px; }

/* ============================== UTILIDADES ================================ */

.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 1.25rem; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.25rem; }

@media (max-width: 1100px) { .grid-3 { grid-template-columns: 1fr; } }
@media (max-width: 900px)  { .grid-2 { grid-template-columns: 1fr; } }

.flex { display: flex; }
.items-centro { align-items: center; }
.gap-2 { gap: .5rem; }
.gap-4 { gap: 1rem; }
.mt-2 { margin-top: .5rem; }
.mt-4 { margin-top: 1rem; }
.mb-0 { margin-bottom: 0; }
.texto-2 { color: var(--c-texto-2); }
.texto-3 { color: var(--c-texto-3); }
.texto-sm { font-size: .8rem; }
.texto-xs { font-size: .72rem; }
.texto-derecha { text-align: right; }
.texto-centro { text-align: center; }
.negrita { font-weight: 700; }
.monto { font-variant-numeric: tabular-nums; font-weight: 700; }
.monto-positivo { color: var(--c-exito); }
.monto-negativo { color: var(--c-peligro); }

/* ============================== IMPRESIÓN ================================= */

/* Bloques que solo existen al imprimir (comprobantes, etiquetas). */
.solo-impresion { display: none; }

@media print {
  .sidebar, .topbar, .btn, .paginacion, .no-imprimir, #toasts { display: none !important; }
  .principal { margin-left: 0; }
  .contenido { padding: 0; }
  .card { box-shadow: none; border: 1px solid #ccc; break-inside: avoid; }
  body { background: #fff; font-size: 12px; }

  /* Modo documento: se imprime SOLO el bloque .solo-impresion.
     Se activa añadiendo la clase `modo-impresion` al <body>. */
  body.modo-impresion .app { display: none !important; }
  body.modo-impresion .solo-impresion { display: block !important; }

  @page { margin: 1cm; size: A4; }
  .etiqueta-item { break-inside: avoid; page-break-inside: avoid; }
}

/* Documento imprimible (comprobante de almacén) */
.doc { max-width: 760px; margin: 0 auto; padding: 1.5rem; color: #111827; }
.doc-cabecera { text-align: center; border-bottom: 2px solid #111827; padding-bottom: .75rem; margin-bottom: 1rem; }
.doc-cabecera h1 { font-size: 1.15rem; margin: 0; letter-spacing: .04em; }
.doc-cabecera p { font-size: .8rem; color: #4b5563; margin: .15rem 0 0; }
.doc-datos { display: grid; grid-template-columns: 1fr 1fr; gap: .3rem 1.5rem; font-size: .8rem; margin-bottom: 1rem; }
.doc-tabla { width: 100%; border-collapse: collapse; font-size: .8rem; margin-bottom: 1rem; }
.doc-tabla th, .doc-tabla td { border-bottom: 1px solid #d1d5db; padding: .35rem .5rem; text-align: left; }
.doc-tabla th { background: #f3f4f6; }
.doc-firmas { display: grid; grid-template-columns: 1fr 1fr; gap: 3rem; margin-top: 3.5rem; }
.doc-firma { text-align: center; border-top: 1.5px solid #111827; padding-top: .4rem; }
.doc-firma strong { font-size: .75rem; display: block; }
.doc-firma span { font-size: .72rem; color: #4b5563; }
.doc-pie { text-align: center; font-size: .7rem; color: #9ca3af; margin-top: 1.5rem; }