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

html {
    min-height: 100%;
}

#wrapper {
    max-width: 542px;
    margin: 16px auto;
    border: 1px solid #231f20;
    background-color: #fff;
    overflow: hidden;
    color: #231f20;
    font-family: 'Roboto', sans-serif;
    font-size: 16px;
    line-height: 21px;
    text-align: center;
    font-weight: 400;
    position: relative;
}

article {
    padding: 10px 16px 8px;
    position: relative;
}

footer {
    padding: 6px 16px 6px 8px;
    background: #464646;
    color: #fff;
    display: flex;
    align-items: center;
    font-size: 14px;
    gap: 16px;
    justify-content: space-between;
}

.qrcode {
    position: absolute;
    bottom: 16px;
    right: 16px;
    z-index: 1;
}

article p {
    margin: 0 0 16px;
}

.margin-bottom {
    margin: 0 0 10px;
}

.margin {
    margin: 0;
}

h1 {
    font-size: 20px;
    line-height: 26px;
    font-weight: 700;
    margin: 0 0 16px;
}

h1 span {
    display: block;
    font-weight: 400;
}

a {
    color: inherit;
    white-space: nowrap;
    text-decoration: none;
}

img {
    max-width: 100%;
    vertical-align: middle;
}

@media all and (max-width: 540px) {
    #wrapper {
        border: none;
        margin: 0 auto;
    }

    article {
        padding: 16px;
    }

    footer {
        flex-direction: column;
        padding: 16px;
    }

    .qrcode {
        position: static;
        display: flex;
        justify-content: center;
        margin: 16px 0 0;
    }

    span {
        white-space: nowrap;
    }

    br {
        display: none;
    }
}