.popup-flotante {
    position: fixed;
    bottom: 24px;
    right: 24px;
    width: 320px;

    background: linear-gradient(135deg, #111827, #1f2937);
    color: #f9fafb;

    font-family: "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    font-size: 14px;
    line-height: 1.5;

    padding: 18px 20px;
    border-radius: 12px;

    box-shadow: 0 10px 30px rgba(0,0,0,.45);
    z-index: 9999;
}

/* Título */
.popup-flotante h6 {
    margin: 0 0 8px;
    font-size: 16px;
    font-weight: 600;
    color: #e5e7eb;
}

/* Texto */
.popup-flotante p {
    margin: 0;
    font-size: 13.5px;
    color: #d1d5db;
}

/* Botón cerrar */
.popup-close {
    position: absolute;
    top: 8px;
    right: 10px;

    background: transparent;
    border: none;

    font-size: 22px;
    line-height: 1;
    color: #9ca3af;

    cursor: pointer;
    transition: color .2s ease;
}

.popup-close:hover {
    color: #ffffff;
}

@media (max-width: 576px) {
    .popup-flotante {
        width: calc(100% - 32px);
        right: 16px;
        left: 16px;
        bottom: 16px;
        border-radius: 10px;
        font-size: 14px;
    }

    .popup-flotante h6 {
        font-size: 15px;
    }

    .popup-close {
        top: 6px;
        right: 8px;
        font-size: 24px;
    }
}