:root {
  --azul-oscuro: #1f2b4d;
  --azul: #2e4a9e;
  --verde: #1fa36b;
  --rojo: #d93b3b;
  --gris-fondo: #f4f6fb;
}

body {
  background-color: var(--gris-fondo);
  font-family: "Segoe UI", Roboto, Arial, sans-serif;
}

.app-navbar {
  background: linear-gradient(135deg, var(--azul-oscuro), var(--azul));
}

.card-stat {
  border: none;
  border-radius: 14px;
  box-shadow: 0 2px 10px rgba(20, 30, 60, .08);
  padding: 1.25rem;
  height: 100%;
}

.card-stat .stat-num {
  font-size: 2rem;
  font-weight: 700;
}

.icono-factura {
  font-size: 1.2rem;
  cursor: pointer;
}
.icono-factura.rojo { color: var(--rojo); }
.icono-factura.verde { color: var(--verde); }

.badge-activo { background-color: var(--verde); }
.badge-inactivo { background-color: var(--rojo); }

.login-wrapper {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--azul-oscuro), var(--azul));
  padding: 1rem;
}

.login-card {
  max-width: 420px;
  width: 100%;
  border-radius: 16px;
  border: none;
  box-shadow: 0 10px 40px rgba(0,0,0,.25);
}

.captcha-img {
  border-radius: 8px;
  border: 1px solid #dde;
  cursor: pointer;
}

@media (max-width: 576px) {
  .table-responsive-stack thead { display: none; }
  .table-responsive-stack tbody tr {
    display: block;
    margin-bottom: .75rem;
    border: 1px solid #e2e6f0;
    border-radius: 10px;
    padding: .5rem .75rem;
    background: #fff;
  }
  .table-responsive-stack tbody td {
    display: flex;
    justify-content: space-between;
    border: none;
    padding: .35rem 0;
  }
  .table-responsive-stack tbody td::before {
    content: attr(data-label);
    font-weight: 600;
    color: var(--azul-oscuro);
    margin-right: .75rem;
  }
}