.promo {
        position: fixed;
        bottom: 40px;
        right: 40px;
        width: 70px;
        height: 70px;
        border-radius: 35px;
        background-color: #00f870;
        display: flex;
        justify-content: center;
        align-items: center;
        cursor: pointer;
        z-index: 1000000;
        transform: scale(1);
        animation: pulse 2s infinite;
    }
    @keyframes pulse {
        0% {
            transform: scale(0.9);
            box-shadow: 0 0 0 0 rgba(0, 0, 0, 0.7);
        }
        70% {
            transform: scale(1.15);
            box-shadow: 0 0 0 10px rgba(0, 0, 0, 0);
        }
        100% {
            transform: scale(0.9);
            box-shadow: 0 0 0 0 rgba(0, 0, 0, 0);
        }
    }