body {
  width: 50%;
  margin: 0 auto;
  background: #151515;
  font-family: "Space Mono", monospace;
  font-size: 19px;
  color: #fff;
  line-height: 2;
  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;
}