/* =====================================================================
   TPV SUPERMERCADO — Hoja de estilos principal
   Diseño propio, moderno y responsive. Sin frameworks externos.
   ===================================================================== */

/* ---- Variables de tema ---- */
:root {
  --color-primario: #2563eb;
  --color-primario-osc: #1d4ed8;
  --color-primario-claro: #dbeafe;
  --color-exito: #16a34a;
  --color-exito-claro: #dcfce7;
  --color-peligro: #dc2626;
  --color-peligro-claro: #fee2e2;
  --color-aviso: #d97706;
  --color-aviso-claro: #fef3c7;

  --gris-900: #0f172a;
  --gris-800: #1e293b;
  --gris-700: #334155;
  --gris-600: #475569;
  --gris-500: #64748b;
  --gris-400: #94a3b8;
  --gris-300: #cbd5e1;
  --gris-200: #e2e8f0;
  --gris-100: #f1f5f9;
  --gris-50:  #f8fafc;
  --blanco:   #ffffff;

  --sombra-sm: 0 1px 2px rgba(15, 23, 42, .06);
  --sombra:    0 1px 3px rgba(15, 23, 42, .1), 0 1px 2px rgba(15, 23, 42, .06);
  --sombra-md: 0 4px 6px -1px rgba(15, 23, 42, .1), 0 2px 4px -2px rgba(15, 23, 42, .1);
  --sombra-lg: 0 10px 15px -3px rgba(15, 23, 42, .1), 0 4px 6px -4px rgba(15, 23, 42, .1);

  --radio: 10px;
  --radio-sm: 6px;
  --radio-lg: 16px;

  --ancho-sidebar: 256px;
  --fuente: 'Segoe UI', system-ui, -apple-system, 'Helvetica Neue', Arial, sans-serif;
}

/* ---- Reset ---- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { font-size: 16px; }
body {
  font-family: var(--fuente);
  color: var(--gris-800);
  background: var(--gris-100);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
button, input, select, textarea { font-family: inherit; font-size: 1rem; }

/* =====================================================================
   LOGIN
   ===================================================================== */
.login-wrap {
  min-height: 100vh;
  display: grid;
  place-items: center;
  background: linear-gradient(135deg, #1e3a8a 0%, #2563eb 55%, #3b82f6 100%);
  padding: 1.5rem;
}
.login-card {
  width: 100%;
  max-width: 410px;
  background: var(--blanco);
  border-radius: var(--radio-lg);
  box-shadow: var(--sombra-lg);
  padding: 2.5rem 2.25rem;
}
.login-logo {
  width: 60px; height: 60px;
  margin: 0 auto 1rem;
  background: var(--color-primario);
  color: #fff;
  border-radius: 16px;
  display: grid; place-items: center;
  font-size: 1.9rem;
}
.login-card h1 { text-align: center; font-size: 1.4rem; color: var(--gris-900); }
.login-card .sub { text-align: center; color: var(--gris-500); margin-bottom: 1.75rem; font-size: .9rem; }

/* =====================================================================
   ESTRUCTURA APP (sidebar + contenido)
   ===================================================================== */
.app { display: flex; min-height: 100vh; }

.sidebar {
  width: var(--ancho-sidebar);
  background: var(--gris-900);
  color: var(--gris-300);
  display: flex;
  flex-direction: column;
  position: fixed;
  inset: 0 auto 0 0;
  z-index: 40;
  transition: transform .25s ease;
}
.sidebar-marca {
  padding: 1.25rem 1.5rem;
  display: flex; align-items: center; gap: .65rem;
  color: #fff; font-weight: 700; font-size: 1.1rem;
  border-bottom: 1px solid var(--gris-800);
}
.sidebar-marca .icono {
  width: 34px; height: 34px; border-radius: 9px;
  background: var(--color-primario);
  display: grid; place-items: center; font-size: 1.1rem;
}
.sidebar-nav { padding: 1rem .75rem; overflow-y: auto; flex: 1; }
.sidebar-nav .grupo {
  font-size: .72rem; text-transform: uppercase; letter-spacing: .05em;
  color: var(--gris-500); margin: 1rem .75rem .4rem;
}
.sidebar-nav a {
  display: flex; align-items: center; gap: .75rem;
  padding: .6rem .75rem; border-radius: var(--radio-sm);
  color: var(--gris-300); font-size: .92rem; margin-bottom: 2px;
  transition: background .15s, color .15s;
}
.sidebar-nav a:hover { background: var(--gris-800); color: #fff; }
.sidebar-nav a.activo { background: var(--color-primario); color: #fff; }
.sidebar-nav a .ico { width: 20px; text-align: center; font-size: 1.05rem; }

.sidebar-pie {
  padding: 1rem; border-top: 1px solid var(--gris-800);
  display: flex; align-items: center; gap: .65rem;
}
.avatar {
  width: 38px; height: 38px; border-radius: 50%;
  background: var(--color-primario); color: #fff;
  display: grid; place-items: center; font-weight: 600;
}
.sidebar-pie .datos { font-size: .85rem; line-height: 1.2; }
.sidebar-pie .datos .rol { color: var(--gris-500); font-size: .75rem; }

/* Contenido principal */
.contenido {
  flex: 1;
  margin-left: var(--ancho-sidebar);
  display: flex; flex-direction: column;
  min-width: 0;
}
.topbar {
  height: 62px;
  background: var(--blanco);
  border-bottom: 1px solid var(--gris-200);
  display: flex; align-items: center; gap: 1rem;
  padding: 0 1.5rem;
  position: sticky; top: 0; z-index: 30;
}
.topbar h2 { font-size: 1.15rem; color: var(--gris-900); font-weight: 600; }
.btn-menu {
  display: block; background: none; border: none; cursor: pointer;
  font-size: 1.5rem; color: var(--gris-700);
}

/* Colapso del menú lateral en escritorio (botón ☰ de la barra superior) */
@media (min-width: 769px) {
  .contenido { transition: margin-left .25s ease; }
  body.sidebar-oculto .sidebar { transform: translateX(-100%); }
  body.sidebar-oculto .contenido { margin-left: 0; }
}
.topbar .crecer { flex: 1; }
.topbar .fecha { color: var(--gris-500); font-size: .85rem; }

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

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

/* Botones */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: .5rem;
  padding: .6rem 1.1rem;
  border: 1px solid transparent;
  border-radius: var(--radio-sm);
  background: var(--gris-100); color: var(--gris-800);
  font-weight: 600; font-size: .9rem; cursor: pointer;
  transition: background .15s, box-shadow .15s, transform .05s;
}
.btn:active { transform: translateY(1px); }
.btn-primario { background: var(--color-primario); color: #fff; }
.btn-primario:hover { background: var(--color-primario-osc); }
.btn-exito { background: var(--color-exito); color: #fff; }
.btn-peligro { background: var(--color-peligro); color: #fff; }
.btn-claro { background: var(--blanco); border-color: var(--gris-300); }
.btn-claro:hover { background: var(--gris-50); }
.btn-sm { padding: .4rem .7rem; font-size: .82rem; }
.btn-bloque { width: 100%; }
.btn:disabled { opacity: .55; cursor: not-allowed; }

/* Tarjetas */
.card {
  background: var(--blanco);
  border: 1px solid var(--gris-200);
  border-radius: var(--radio);
  box-shadow: var(--sombra-sm);
}
.card-cuerpo { padding: 1.25rem; }
.card-cabecera {
  padding: 1rem 1.25rem; border-bottom: 1px solid var(--gris-200);
  display: flex; align-items: center; justify-content: space-between; gap: 1rem;
}
.card-cabecera h3 { font-size: 1rem; color: var(--gris-900); }

/* KPIs del dashboard */
.kpis {
  display: grid; gap: 1rem;
  grid-template-columns: repeat(auto-fit, minmax(210px, 1fr));
  margin-bottom: 1.5rem;
}
.kpi {
  background: var(--blanco);
  border: 1px solid var(--gris-200);
  border-radius: var(--radio);
  padding: 1.25rem;
  box-shadow: var(--sombra-sm);
  display: flex; align-items: center; gap: 1rem;
}
.kpi .kpi-ico {
  width: 48px; height: 48px; border-radius: 12px;
  display: grid; place-items: center; font-size: 1.4rem; flex-shrink: 0;
}
.kpi .et { color: var(--gris-500); font-size: .82rem; }
.kpi .val { font-size: 1.5rem; font-weight: 700; color: var(--gris-900); }
.ico-azul  { background: var(--color-primario-claro); color: var(--color-primario); }
.ico-verde { background: var(--color-exito-claro); color: var(--color-exito); }
.ico-ambar { background: var(--color-aviso-claro); color: var(--color-aviso); }
.ico-rojo  { background: var(--color-peligro-claro); color: var(--color-peligro); }
.ico-gris  { background: var(--gris-200, #e2e8f0); color: var(--gris-600, #475569); }

/* Rejilla de paneles */
.rejilla { display: grid; gap: 1.5rem; }
.rejilla-2 { grid-template-columns: 2fr 1fr; }
.rejilla-3 { grid-template-columns: repeat(3, 1fr); }

/* Tablas */
.tabla-wrap { overflow-x: auto; }
table.tabla { width: 100%; border-collapse: collapse; font-size: .9rem; }
table.tabla th, table.tabla td {
  padding: .75rem 1rem; text-align: left; border-bottom: 1px solid var(--gris-200);
  white-space: nowrap;
}
table.tabla thead th {
  background: var(--gris-50); color: var(--gris-600);
  font-weight: 600; font-size: .78rem; text-transform: uppercase; letter-spacing: .03em;
}
table.tabla tbody tr:hover { background: var(--gris-50); }
table.tabla td.num, table.tabla th.num { text-align: right; }

/* Badges */
.badge {
  display: inline-block; padding: .2rem .6rem; border-radius: 999px;
  font-size: .75rem; font-weight: 600;
}
.badge-verde { background: var(--color-exito-claro); color: #15803d; }
.badge-rojo  { background: var(--color-peligro-claro); color: #b91c1c; }
.badge-ambar { background: var(--color-aviso-claro); color: #b45309; }
.badge-gris  { background: var(--gris-200); color: var(--gris-700); }
.badge-azul  { background: var(--color-primario-claro); color: var(--color-primario-osc); }

/* Cuenta atrás de caducidad (temporalizador del listado de productos) */
.cuenta-atras {
  display: inline-block; padding: .15rem .5rem; border-radius: 999px;
  font-size: .72rem; font-weight: 700; font-variant-numeric: tabular-nums;
  background: var(--gris-200); color: var(--gris-700); white-space: nowrap;
}
.cuenta-atras.cad-ok      { background: var(--color-exito-claro);   color: #15803d; }
.cuenta-atras.cad-pronto  { background: var(--color-aviso-claro);   color: #b45309; }
.cuenta-atras.cad-urgente { background: var(--color-peligro-claro); color: #b91c1c;
  animation: cadPulso 1s ease-in-out infinite; }
.cuenta-atras.cad-vencido { background: var(--gris-800); color: #fff; }
@keyframes cadPulso { 0%, 100% { opacity: 1; } 50% { opacity: .5; } }

/* Formularios */
.form-grid { display: grid; gap: 1rem; grid-template-columns: repeat(2, 1fr); }
.campo { display: flex; flex-direction: column; gap: .35rem; }
.campo.full { grid-column: 1 / -1; }
.campo label { font-size: .85rem; font-weight: 600; color: var(--gris-700); }
.campo .ayuda { font-size: .76rem; color: var(--gris-500); }
.control {
  width: 100%; padding: .6rem .8rem;
  border: 1px solid var(--gris-300); border-radius: var(--radio-sm);
  background: var(--blanco); color: var(--gris-900);
  transition: border-color .15s, box-shadow .15s;
}
.control:focus {
  outline: none; border-color: var(--color-primario);
  box-shadow: 0 0 0 3px var(--color-primario-claro);
}
textarea.control { resize: vertical; min-height: 90px; }

/* Barra de acciones */
.barra-acciones {
  display: flex; align-items: center; gap: 1rem; margin-bottom: 1.25rem;
  flex-wrap: wrap;
}
.barra-acciones .crecer { flex: 1; }
.buscador { position: relative; max-width: 360px; width: 100%; }
.buscador input { padding-left: 2.3rem; }
.buscador .lupa { position: absolute; left: .75rem; top: 50%; transform: translateY(-50%); color: var(--gris-400); }

/* Alertas / flash */
.alerta {
  padding: .85rem 1.1rem; border-radius: var(--radio-sm);
  margin-bottom: 1rem; font-size: .9rem; display: flex; align-items: center; gap: .6rem;
  border: 1px solid transparent;
}
.alerta-exito  { background: var(--color-exito-claro); color: #15803d; border-color: #bbf7d0; }
.alerta-error  { background: var(--color-peligro-claro); color: #b91c1c; border-color: #fecaca; }
.alerta-aviso  { background: var(--color-aviso-claro); color: #b45309; border-color: #fde68a; }

/* Paginación */
.paginacion { display: flex; gap: .35rem; justify-content: center; margin-top: 1.25rem; flex-wrap: wrap; }
.paginacion a, .paginacion span {
  padding: .45rem .8rem; border-radius: var(--radio-sm);
  border: 1px solid var(--gris-300); background: var(--blanco); font-size: .85rem;
}
.paginacion a:hover { background: var(--gris-50); }
.paginacion .actual { background: var(--color-primario); color: #fff; border-color: var(--color-primario); }

/* Estado vacío */
.vacio { text-align: center; padding: 3rem 1rem; color: var(--gris-500); }
.vacio .ic { font-size: 2.5rem; opacity: .4; margin-bottom: .5rem; }

/* Miniatura producto */
.thumb {
  width: 42px; height: 42px; border-radius: 8px; object-fit: cover;
  background: var(--gris-100); border: 1px solid var(--gris-200);
}
.thumb-ph { display: grid; place-items: center; color: var(--gris-400); }

/* Lista simple (dashboard) */
.lista-simple { list-style: none; }
.lista-simple li {
  display: flex; align-items: center; justify-content: space-between;
  padding: .6rem 0; border-bottom: 1px solid var(--gris-100); font-size: .9rem;
}
.lista-simple li:last-child { border-bottom: none; }
.lista-simple .sec { color: var(--gris-500); font-size: .8rem; }

/* Utilidades */
.flex { display: flex; }
.items-center { align-items: center; }
.gap { gap: .75rem; }
.mt { margin-top: 1rem; }
.mb { margin-bottom: 1rem; }
.text-muted { color: var(--gris-500); }
.text-right { text-align: right; }
.fw-bold { font-weight: 700; }
.nowrap { white-space: nowrap; }

/* Overlay para móvil */
.overlay {
  display: none; position: fixed; inset: 0; background: rgba(15,23,42,.5); z-index: 39;
}
.overlay.activo { display: block; }

/* =====================================================================
   RESPONSIVE
   ===================================================================== */
@media (max-width: 1024px) {
  .rejilla-2, .rejilla-3 { grid-template-columns: 1fr; }
}
@media (max-width: 768px) {
  .sidebar { transform: translateX(-100%); }
  .sidebar.abierto { transform: translateX(0); }
  .contenido { margin-left: 0; }
  .btn-menu { display: block; }
  .form-grid { grid-template-columns: 1fr; }
  .topbar .fecha { display: none; }
}

/* =====================================================================
   UTILIDADES ADICIONALES (módulos de administración)
   ===================================================================== */
.oculto { display: none; }
.m0 { margin: 0; }
.mb-sm { margin-bottom: .5rem; }
.items-end { align-items: flex-end; }
.texto-tenue { color: var(--gris-500); font-size: .85rem; }
.sub { color: var(--gris-500); font-size: .8rem; }
.fila-extra td { background: var(--gris-50); }
.btn-ambar { background: var(--color-aviso); color: #fff; }
.btn-ambar:hover { filter: brightness(.95); }
code { background: var(--gris-100); padding: .1rem .4rem; border-radius: 5px; font-size: .82rem; }
.card.mb { margin-bottom: 1.25rem; }
.card-cabecera h3.m0 { margin: 0; }

/* ===================================================================
 *  Utilidades añadidas (módulos Email/SMS, pagos, reportes)
 * =================================================================== */
.grid-2 { display: grid; gap: 1.5rem; grid-template-columns: 1fr 1fr; align-items: start; }
@media (max-width: 900px) { .grid-2 { grid-template-columns: 1fr; } }

.alerta-ambar { background: var(--color-aviso-claro); color: #b45309; border-color: #fde68a; }

.lista-limpia { list-style: none; margin: 0; padding: 0; }
.lista-limpia li { padding: .45rem 0; border-bottom: 1px solid var(--gris-200); font-size: .9rem; }
.lista-limpia li:last-child { border-bottom: none; }

.crecer { flex: 1; }
.items-center { align-items: center; }

/* =====================================================================
   OCULTAR MENÚ LATERAL (botón del panel de control)
   ===================================================================== */
body.sidebar-oculta .sidebar { transform: translateX(-100%); }
body.sidebar-oculta .contenido { margin-left: 0; }
@media (max-width: 768px) {
  /* En móvil el menú ya se gestiona con el botón ☰ existente */
  body.sidebar-oculta .sidebar.abierto { transform: translateX(0); }
}