body {
  display: flex;
  flex-direction: row-reverse;
  justify-content: space-between;
}

._vn-menu-bar {
  flex: 2 2 auto;
  margin-left: 0.5rem;
  margin-right: 0.5rem;
  max-width: 75ch;
  min-width: 0;
}

main {
  flex: 3 3 auto;
  margin-left: 0.5rem;
  margin-right: 0.5rem;
  max-width: 75ch;
  min-width: 20ch;
}

._vn-menu {
  border-style: solid;
  border-width: 1px;
  position: fixed;
  right: 0;
  top: 0;
  z-index: 1;
}

._vn-menu > h2 {
  margin: 0;
  text-align: right;
}

._vn-menu-button {
  cursor: pointer;
  display: inline-block;
  font-family: monospace;
  font-size: 2rem;
  height: 2.5rem;
  line-height: 2.5rem;
  margin: 0;
  text-align: center;
  vertical-align: middle;
  width: 2.5rem;
}

._vn-menu-content {
  display: none;
  padding: 1rem;
}

._vn-menu-open ._vn-menu-content {
  display: block;
}

._vn-navigation-menu ul {
  list-style: none;
  margin: 0;
  padding-left: 1rem;
  padding-right: 1rem;
}

._vn-viewbox {
  border-style: solid;
  border-width: 1px;
  height: 0;
  left: 0;
  opacity: 0.2;
  position: absolute;
  right: 0;
  top: 0;
  z-index: -1;
}

._vn-controls-menu {
  top: 2.5rem;
}
._vn-controls-menu label {
  display: block;
}

._vn-hide {
  display: none;
}

._vn-slideshow main ._vn-slide._vn-inactive {
  display: none;
}

html,
._vn-light {
  background-color: #fafafa;
  color: #000;
}
html ._vn-menu,
._vn-light ._vn-menu {
  background-color: rgba(250, 250, 250, 0.9);
  border-color: #c0c0c0;
}
html ._vn-menu > h2:hover,
._vn-light ._vn-menu > h2:hover {
  background-color: rgba(240, 240, 240, 0.9);
}
html ._vn-menu-open,
._vn-light ._vn-menu-open {
  background-color: rgba(240, 240, 240, 0.9);
}
html ._vn-viewbox,
._vn-light ._vn-viewbox {
  background-color: #c0c0c0;
  border-color: #000;
}
html a,
._vn-light a {
  color: #0645ad;
}

@media (prefers-color-scheme: dark) {
  html {
    background-color: #000;
    color: #ddd;
  }
  html ._vn-menu {
    background-color: rgba(0, 0, 0, 0.9);
    border-color: #c0c0c0;
  }
  html ._vn-menu > h2:hover {
    background-color: rgba(40, 40, 40, 0.9);
  }
  html ._vn-menu-open {
    background-color: rgba(40, 40, 40, 0.9);
  }
  html ._vn-viewbox {
    background-color: #c0c0c0;
    border-color: #fff;
  }
  html a {
    color: #7af;
  }
}
._vn-dark {
  background-color: #000;
  color: #ddd;
}
._vn-dark ._vn-menu {
  background-color: rgba(0, 0, 0, 0.9);
  border-color: #c0c0c0;
}
._vn-dark ._vn-menu > h2:hover {
  background-color: rgba(40, 40, 40, 0.9);
}
._vn-dark ._vn-menu-open {
  background-color: rgba(40, 40, 40, 0.9);
}
._vn-dark ._vn-viewbox {
  background-color: #c0c0c0;
  border-color: #fff;
}
._vn-dark a {
  color: #7af;
}

._vn-blank {
  background-color: #000;
  visibility: hidden;
}

@media (max-width: 1080px) and (min-width: 75ch) {
  html {
    font-size: 110%;
  }
}
@media (max-width: 1080px) and (min-width: 80ch) {
  html {
    font-size: 120%;
  }
}
@media (max-width: 1080px) and (min-width: 85ch) {
  html {
    font-size: 130%;
  }
}
@media (max-width: 1080px) and (min-width: 90ch) {
  html {
    font-size: 140%;
  }
}
@media (max-width: 1080px) and (min-width: 95ch) {
  html {
    font-size: 150%;
  }
}
@media (max-width: 1080px) and (min-width: 100ch) {
  html {
    font-size: 160%;
  }
}
@media (max-width: 1080px) and (min-width: 105ch) {
  html {
    font-size: 170%;
  }
}
@media (min-width: 1081px) {
  html {
    font-size: 100%;
  }

  html:not(._vn-slideshow) ._vn-menu-bar {
    flex: 2 2 30%;
  }
  html:not(._vn-slideshow) main {
    flex: 3 3 70%;
  }
  html:not(._vn-slideshow) ._vn-navigation-menu {
    border-style: none;
    position: static;
  }
  html:not(._vn-slideshow) ._vn-navigation-menu ._vn-menu-button {
    display: none;
  }
  html:not(._vn-slideshow) ._vn-navigation-menu ._vn-menu-content {
    display: flex;
    position: fixed;
    top: 3rem;
  }
  html:not(._vn-slideshow) ._vn-controls-menu {
    top: 0;
  }
}
@media (min-width: 120ch) {
  html {
    font-size: 120%;
  }
}
@media (min-width: 140ch) {
  html {
    font-size: 140%;
  }
}
@media (min-width: 160ch) {
  html {
    font-size: 160%;
  }
}
@media (min-width: 180ch) {
  html {
    font-size: 180%;
  }
}
@media (min-width: 200ch) {
  html {
    font-size: 200%;
  }
}
@media (min-width: 220ch) {
  html {
    font-size: 220%;
  }
}
@media (min-width: 240ch) {
  html {
    font-size: 240%;
  }
}
@media (min-width: 260ch) {
  html {
    font-size: 260%;
  }
}
@media (min-width: 280ch) {
  html {
    font-size: 280%;
  }
}
@media (min-width: 300ch) {
  html {
    font-size: 300%;
  }
}