body {
  font-family: sans-serif;
}

h1 {
  font-size: 1.5em;
  margin: 0 0.5em 0 0.5em;
}

#dangumi {
  writing-mode: vertical-rl;
  -webkit-writing-mode: vertical-rl;
  -ms-writing-mode: tb-rl;
  width: calc(95vw - (100vw - 100%));
  height: auto;
  padding: 20px;
  columns: 15em;
  column-gap: 20px;
  column-rule: 1px dashed darkgray;
}

@-moz-document url-prefix() {
  #dangumi {
    width: auto;
    float: right;
  }
}

[contenteditable] {
  user-select: text;
  -webkit-user-select: text;
}
[contenteditable]:focus {
  outline: solid 0px;
}