#contenido-principal {
    background-image: url('/frontend/img/tpvfondo.png');
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;

    padding: 40px;
    border-radius: 10px;
    min-height: 100vh;
}
#contenido-principal h1,
#contenido-principal p {
    color: white;
    text-shadow: 0 0 5px black;
}

#footer {
    position: fixed;
    bottom: 0;
    left: 260px; /* ESTE es el valor correcto */
    right: 0;
    background: rgba(0,0,0,0.7);
    color: #fff;
    padding: 10px 20px;
    font-size: 14px;
    text-align: center;
    z-index: 999;
}
/* ============================================
   CONTENEDOR DE LOS CUADROS TPV
   ============================================ */
.tpv-info-box {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;        /* CENTRADO */
    gap: 25px;
    margin-top: 80px;               /* MUCHO MÁS ABAJO */
    width: 100%;
}

/* ============================================
   CUADROS TPV ESTILO TRANSPARENTE CYBER
   ============================================ */
.tpv-item {
    background: rgba(0, 0, 0, 0.35); /* TRANSPARENTE COMO EL FONDO */
    border: 2px solid #00eaff;
    box-shadow: 0 0 12px #00eaff, inset 0 0 12px #00eaff;
    padding: 20px;
    border-radius: 12px;
    width: 260px;
    text-align: center;
    color: #fff;
    font-size: 18px;
    font-weight: bold;
    transition: 0.2s;
}

.tpv-item span {
    display: block;
    margin-top: 10px;
    font-size: 24px;
    color: #00eaff;
}

.tpv-item:hover {
    transform: scale(1.05);
    box-shadow: 0 0 18px #00eaff, inset 0 0 18px #00eaff;
}