/* Popup Open button */
.open-button {
    color: #FFF;
    background: #0066CC;
    padding: 10px;
    text-decoration: none;
    border: 1px solid #0157ad;
    border-radius: 3px;
}

    .open-button:hover {
        background: #01478e;
    }

.popup {
    position: relative;
    top: 0px;
    left: 0px;
    background: rgba(0,0,0,0.75);
    width: 100%;
    height: 100%;
    display: none;
}

/* Popup inner div */
.popup-content {
    width: 500px;
    margin: 0 auto;
    box-sizing: border-box;
    padding: 40px;
    margin-top: 20px;
    box-shadow: 0px 2px 6px rgba(0,0,0,1);
    border-radius: 3px;
    background: #fff;
    position: relative;
}

/* Popup close button */
.close-button {
    width: 25px;
    height: 25px;
    position: absolute;
    top: -10px;
    right: -10px;
    border-radius: 20px;
    background: rgba(0,0,0,0.8);
    font-size: 20px;
    text-align: center;
    color: #fff;
    text-decoration: none;
}

    .close-button:hover {
        background: rgba(0,0,0,1);
    }

@media screen and (max-width: 720px) {
    .popup-content {
        width: 90%;
    }
}

.container {
    position: relative;
}