* {
    box-sizing: border-box;
    margin: 0px;
    padding: 0px;
}

html {
    min-height: 100%;
}

#wrapper {
    max-width: 800px;
    background: #111;
    border: 1px solid #000;
    font-family: 'Roboto', sans-serif;
    font-size: 13px;
    line-height: 18px;
    text-align: left;
    margin: 12px auto;
    padding: 0px;
    overflow: hidden;
    position: relative;
    color: #fff;
}

#anzeige_div {
    padding: 20px;
}

#header {
    padding: 20px;
    background: #fff;
}

.center-button {
    display: flex;
    flex-direction: column;
    align-items: flex-end;
    justify-content: flex-end;
}

.button {
    display: block;
    width: 120px;
    background: #009fdf;
    margin: 20px 0;
    height: 40px;
    line-height: 40px;
    text-align: center;
    font-weight: 700;
    border-radius: 10px;
}

#footer {
    margin: 20px 0 0;
}

h1 {
    font-size: 20px;
    margin: 16px 0;
    line-height: 23px;
}

p {
    margin-bottom: 16px;
}

p:last-child {
    margin-bottom: 0px;
}

a {
    color: #fff;
    text-decoration: none;
}

img {
    max-width: 100%;
}

ul {
    margin: 0 0 20px 35px;
}

ul li {
    list-style: none;
    text-indent: -15px;
}

ul li:before {
    font-size: 20px;
    margin-right: 15px;
    position: relative;
    top: 1px;
    float: left;
    content: "\2022";
}

.center {
    text-align: center;
}

.social {
    display: flex;
    justify-content: flex-end;
    align-items: center;
    gap: 2px;
}

@media screen and (max-width: 800px) {
    #wrapper {
        width: 100%;
        border: none;
        margin: 0px;
    }

    #anzeige_div {
        padding: 10px;
    }

    #anzeige_div br {
        display: none;
    }

    #header {
        text-align: center;
    }

    .center-button,
    .social {
        justify-content: center;
        align-items: center;
    }

    #footer br {
        display: block;
    }
}