body {
    margin: 0 auto;
}

.odkaz_img {
    display: block;
}


@media (max-width: 640px) {
    .odkaz_img {
        display: none;
    }

    .odkaz_img_mobil_do640 {
        display: block;
        width: 100%;
        float: left;
    }

    .odkaz_img_mobil_do640_blackline {
        display: block;
        border-bottom: 29px solid #000;
        margin-left: 69px;
        margin-right: 69px;
        float: center;
    }

    .odkaz_img_mobil_do640_blackline_thin {
        display: block;
        border-bottom: 2px solid #000;
        margin-left: 89px;
        margin-right: 89px;
        float: center;
    }

    .reg {
        font-family: Raleway;
        font-size: 24px;
        font-style: normal;
        font-variant: normal;
        font-weight: 900;
        line-height: 26px;
        margin-top: 36px;
    }

    .contact_us {
        font-family: Raleway;
        font-size: 13px;
        font-style: normal;
        font-variant: normal;
        font-weight: 300;
        line-height: 26px;
        margin-left: 89px;
        margin-right: 89px;
        margin-top: 9px;
    }

    .contact_us_mail {
        margin-left: 89px;
        margin-right: 89px;
        margin-top: 4px;
        text-decoration: none;
        background-image: url(../images/mail_button.svg);
        background-color: white;
        widows: 120px;
        height: 26px;
        background-repeat: no-repeat;
    }

    .use_button {
        margin-left: 89px;
        margin-right: 89px;
        margin-top: 8px;
        text-decoration: none;
        background-image: url(../images/use_button.svg);
        background-color: white;
        widows: 120px;
        height: 69px;
        background-repeat: no-repeat;
    }

    .control_button {
        margin-left: 89px;
        margin-right: 89px;
        margin-top: 16px;
        text-decoration: none;
        background-image: url(../images/control_button.svg);
        background-color: white;
        widows: 120px;
        height: 69px;
        background-repeat: no-repeat;
    }

    .google_play {
        background-size: cover;
        max-width: 42%;
        margin-top: 0px;
        text-decoration: none;
        background-image: url(../images/google-play-badge.svg);
        background-color: white;
        background-repeat: no-repeat;

    }

    .h3 {
        font-family: Raleway;
        font-size: 14px;
        font-style: normal;
        font-variant: normal;
        font-weight: 300;
        line-height: 15px;
    }
}

@media (min-width: 640px) {
    .odkaz_img_mobil_do640 {
        display: none;
    }
}