.pulse-button {
    width: 45px;
    height: 45px;
    border: none;
    box-shadow: 0 0 0 0 rgba(227, 0, 15, 0.7);
    border-radius: 10px;
    cursor: pointer;
    -webkit-animation: pulse 1.25s infinite cubic-bezier(0.66, 0, 0, 1);
    -moz-animation: pulse 1.25s infinite cubic-bezier(0.66, 0, 0, 1);
    -ms-animation: pulse 1.25s infinite cubic-bezier(0.66, 0, 0, 1);
    animation: pulse 1.25s infinite cubic-bezier(0.66, 0, 0, 1);
    background-color: #e3000f;
    position: absolute;
    margin: auto;
    top: 0;
    right: 0;
    bottom: 0;
    left: 0;
    color: #fff;
    display: flex;
    justify-content: center;
    align-items: center;
    padding-left: 2px;
    z-index: 2;
}

.pulse-button:hover {
    -webkit-animation: none;
    -moz-animation: none;
    -ms-animation: none;
    animation: none;
}

@-webkit-keyframes pulse {
    to {
        box-shadow: 0 0 0 45px rgba(232, 76, 61, 0);
    }
}

@-moz-keyframes pulse {
    to {
        box-shadow: 0 0 0 45px rgba(232, 76, 61, 0);
    }
}

@-ms-keyframes pulse {
    to {
        box-shadow: 0 0 0 45px rgba(232, 76, 61, 0);
    }
}

@keyframes pulse {
    to {
        box-shadow: 0 0 0 45px rgba(232, 76, 61, 0);
    }
}