/* START TOOLTIP STYLES */
[tooltip] {
    position: relative; /* opinion 1 */
  }
  
  /* Applies to all tooltips */
  [tooltip]::before,
  [tooltip]::after {
    text-transform: none; /* opinion 2 */
    font-size: .9em; /* opinion 3 */
    line-height: 1;
    -webkit-user-select: none;
       -moz-user-select: none;
        -ms-user-select: none;
            user-select: none;
    pointer-events: none;
    position: absolute;
    display: none;
    opacity: 0;
  }
  [tooltip]::before {
    content: '';
    border: 5px solid transparent; /* opinion 4 */
    z-index: 1001; /* absurdity 1 */
  }
  [tooltip]::after {
    content: attr(tooltip); /* magic! */
    
    /* most of the rest of this is opinion */
    font-family: Helvetica, sans-serif;
    text-align: center;
    
    /* 
      Let the content set the size of the tooltips 
      but this will also keep them from being obnoxious
      */
    min-width: 3em;
    max-width: 21em;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    padding: 1ch 1.5ch;
    border-radius: .3ch;
    box-shadow: 0 1em 2em -.5em rgba(0, 0, 0, 0.35);
    background: #333;
    color: #fff;
    z-index: 1000; /* absurdity 2 */
  }
  
  /* Make the tooltips respond to hover */
  [tooltip]:hover::before,
  [tooltip]:hover::after {
    display: block;
  }
  
  /* don't show empty tooltips */
  [tooltip='']::before,
  [tooltip='']::after {
    display: none !important;
  }
  
  /* FLOW: UP */
  [tooltip]:not([flow])::before,
  [tooltip][flow^="up"]::before {
    bottom: 100%;
    border-bottom-width: 0;
    border-top-color: #333;
  }
  [tooltip]:not([flow])::after,
  [tooltip][flow^="up"]::after {
    bottom: calc(100% + 5px);
  }
  [tooltip]:not([flow])::before,
  [tooltip]:not([flow])::after,
  [tooltip][flow^="up"]::before,
  [tooltip][flow^="up"]::after {
    left: 50%;
    -webkit-transform: translate(-50%, -.5em);
            transform: translate(-50%, -.5em);
  }
  
  /* FLOW: DOWN */
  [tooltip][flow^="down"]::before {
    top: 100%;
    border-top-width: 0;
    border-bottom-color: #333;
  }
  [tooltip][flow^="down"]::after {
    top: calc(100% + 5px);
  }
  [tooltip][flow^="down"]::before,
  [tooltip][flow^="down"]::after {
    left: 50%;
    -webkit-transform: translate(-50%, .5em);
            transform: translate(-50%, .5em);
  }
  
  /* FLOW: LEFT */
  [tooltip][flow^="left"]::before {
    top: 50%;
    border-right-width: 0;
    border-left-color: #333;
    left: calc(0em - 5px);
    -webkit-transform: translate(-.5em, -50%);
            transform: translate(-.5em, -50%);
  }
  [tooltip][flow^="left"]::after {
    top: 50%;
    right: calc(100% + 5px);
    -webkit-transform: translate(-.5em, -50%);
            transform: translate(-.5em, -50%);
  }
  
  /* FLOW: RIGHT */
  [tooltip][flow^="right"]::before {
    top: 50%;
    border-left-width: 0;
    border-right-color: #333;
    right: calc(0em - 5px);
    -webkit-transform: translate(.5em, -50%);
            transform: translate(.5em, -50%);
  }
  [tooltip][flow^="right"]::after {
    top: 50%;
    left: calc(100% + 5px);
    -webkit-transform: translate(.5em, -50%);
            transform: translate(.5em, -50%);
  }
  
  /* KEYFRAMES */
  @-webkit-keyframes tooltips-vert {
    to {
      opacity: .9;
      -webkit-transform: translate(-50%, 0);
              transform: translate(-50%, 0);
    }
  }
  @keyframes tooltips-vert {
    to {
      opacity: .9;
      -webkit-transform: translate(-50%, 0);
              transform: translate(-50%, 0);
    }
  }
  
  @-webkit-keyframes tooltips-horz {
    to {
      opacity: .9;
      -webkit-transform: translate(0, -50%);
              transform: translate(0, -50%);
    }
  }
  
  @keyframes tooltips-horz {
    to {
      opacity: .9;
      -webkit-transform: translate(0, -50%);
              transform: translate(0, -50%);
    }
  }
  
  /* FX All The Things */ 
  [tooltip]:not([flow]):hover::before,
  [tooltip]:not([flow]):hover::after,
  [tooltip][flow^="up"]:hover::before,
  [tooltip][flow^="up"]:hover::after,
  [tooltip][flow^="down"]:hover::before,
  [tooltip][flow^="down"]:hover::after {
    -webkit-animation: tooltips-vert 300ms ease-out forwards;
            animation: tooltips-vert 300ms ease-out forwards;
  }
  
  [tooltip][flow^="left"]:hover::before,
  [tooltip][flow^="left"]:hover::after,
  [tooltip][flow^="right"]:hover::before,
  [tooltip][flow^="right"]:hover::after {
    -webkit-animation: tooltips-horz 300ms ease-out forwards;
            animation: tooltips-horz 300ms ease-out forwards;
  }
  
  
  
  
  
  
  
  
  
  
  /* UNRELATED to tooltips */
  body {
    margin: 0;
    min-height: 100vh;
    display: -webkit-box;
    display: -ms-flexbox;
    display: flex;
    -webkit-box-orient: vertical;
    -webkit-box-direction: normal;
        -ms-flex-direction: column;
            flex-direction: column;
    font-family: sans-serif;
    background: #ededed;
  }
  main {
    -webkit-box-flex: 1;
        -ms-flex: 1 1 100vh;
            flex: 1 1 100vh;
    display: -webkit-box;
    display: -ms-flexbox;
    display: flex;
    -webkit-box-orient: vertical;
    -webkit-box-direction: normal;
        -ms-flex-direction: column;
            flex-direction: column;
    -webkit-box-align: center;
        -ms-flex-align: center;
            align-items: center;
    -webkit-box-pack: center;
        -ms-flex-pack: center;
            justify-content: center;
  }
  aside {
    -webkit-box-flex: 0;
        -ms-flex: none;
            flex: none;
    display: -webkit-box;
    display: -ms-flexbox;
    display: flex;
    -webkit-box-align: center;
        -ms-flex-align: center;
            align-items: center;
    -webkit-box-pack: center;
        -ms-flex-pack: center;
            justify-content: center;
    background: #49b293;
    color: #fff;
    padding: 1em;
  }
  main div {
    text-align: center;
    color: #353539;
  }
  main span {
    padding: .5em 1em;
    margin: .5em;
    display: inline-block;
    background: #dedede;
  }
  
  aside a {
    color: inherit;
    text-decoration: none;
    font-weight: bold;
    display: inline-block;
    padding: .4em 1em;
  }