* {
  font-family: sans-serif;
}

nav {
  ul {
    list-style: none;
    padding: 0;

    &>li {
      display: inline-block;
      position: relative;
      border: 1px solid transparent;

      ul {
        display: none;
        background: white;
        text-wrap: nowrap;
        border: 1px solid black;

        li {
          display: block;
          padding: 0;

          a {
            display: block;
            padding: 0.3em;
            width: 100%;
            border: 1px solid transparent;

            &:hover {
              background: #f0f0f0;
              border: 1px solid blue;
            }
          }
        }
      }

      &:hover {
        background: #f0f0f0;
        border: 1px solid black;

        &>ul {
          display: block;
          position: absolute;
        }
      }
    }
  }
}

img.full {
  max-width: 100vw;
  max-height: 100vh;
}

div.gallery {
  vertical-align: middle;

  img {
    display: inline;
    max-width: calc(100% - 1em);
    max-height: 100%;
    margin: 0.5em;
  }
}