html {
    margin: 0px;
    padding: 0px;
}
body {
    background-color: black;
    color: white;
    font-family: "Helvetica Neue", Helvetica, Arial, sans-serif;
    font-size: 18px;
}
article {
    max-width: 100%;
    margin: 0;
    padding: 0;
}
h1 {
    color: red;
    text-align: center;
    font-size: 2.5em;
}
h2 {
    color: orange;
    text-align: center;
    font-size: 1.8em;
}
h3 {
    color: yellow;
    font-size: 1.3em;
}
b {
    color: yellow;
}
img {
    max-width: 100%;
}
i {
    color: gray;
}
li {
    padding-bottom: 0.5em;
}
a {
    /*padding: 0;*/
    /*margin: 0;*/
    color: yellow;
}
a:hover {
    color: orange;
}
.wrapper {
    background-color: #222;
    width: 1024px;
    max-width: 92%;
    min-height: 80%;
    /*    position: relative;
    top: 1em;*/
    margin: 0 auto;
    margin-bottom: 50px;
    padding: 30px;
    /*    padding-top: 30px;
    padding-bottom: 30px;*/
}
.go_top {
    float: right;
    color: yellow;
}
.qr {
    width: 30%;
    float: right;
    margin: 0;
    margin-left: 2%;
    margin-bottom: 2%; 
    text-align: center;
}
.qr a {
    color: orange;
}
.qr a:hover {
    color: red;
}
@media (max-width: 800px) {
    .wrapper {
        max-width: 95%;
        padding: 10px;
    }
    .qr {
        width: 100%;
        max-width: 400px;
        float: none;
        margin: 10px auto;
    }
    h1 {
        font-size: 2em;
    }
    h2 {
        color: orange;
        text-align: center;
        font-size: 1.5em;
    }
    h3 {
        color: yellow;
        font-size: 1.2em;
    }
}
.z {
    text-decoration: line-through;
}