body {
    width: 50%;
    margin: 0 auto;
    background: #151515;
    font-family: "Space Mono", monospace;
    font-size: 19px;
    color: #fff;
    line-height: 2.0;
    display: table;
}

html,body
{
    height: 100%;
}

html::after {
    content:'';
    position: absolute;
    top: 0;
    width:100%;
    height: 100%;
    background-image: linear-gradient(rgba(0,0,0,0.4) 1px, transparent 1px);
    background-size: 2px 2px;
    background-repeat: repeat;
    pointer-events: none;
}

@media screen and (max-width: 1300px) {
    body {
        width: 90%;
    }
}

h1 {
    font-size: 2.5em;
    margin: 0;
    padding: 0;
}

header {
    padding: 0 20px 20px 0;
    display: flex;
    align-items: center;
}

ul {
    padding-left: 0;
    margin-top: 0;
    list-style: none;
}

a {
    color: #fff;
    text-decoration: white underline 2px;
}

hr {
    height: 4px;
    background: #fff;
    opacity: 25%;
    border: none;
}

#header_block {
    margin-left: 5%;
}

#banner {
    height: auto;
    width: 35%;
}

#content {
    height: 100%;
    display: table-cell;
    vertical-align: middle;
    padding: 0;
    margin: 0;
}