/*
  https://developer.mozilla.org/en/docs/Web/CSS/box-shadow
  box-shadow: [inset?] [top] [left] [blur] [size] [color];

  Tips:
    - We're setting all the blurs to 0 since we want a solid fill.
    - Add the inset keyword so the box-shadow is on the inside of the element
    - Animating the inset shadow on hover looks like the element is filling in from whatever side you specify ([top] and [left] accept negative values to become [bottom] and [right])
    - Multiple shadows can be stacked
    - If you're animating multiple shadows, be sure to keep the same number of shadows so the animation is smooth. Otherwise, you'll get something choppy.
*/
.fill:hover,
.fill:focus {
  box-shadow: inset 0 0 0 2em var(--hover);
}

.pulse:hover,
.pulse:focus {
  -webkit-animation: pulse 1s;
          animation: pulse 1s;
  box-shadow: 0 0 0 2em rgba(255, 255, 255, 0);
}

@-webkit-keyframes pulse {
  0% {
    box-shadow: 0 0 0 0 var(--hover);
  }
}

@keyframes pulse {
  0% {
    box-shadow: 0 0 0 0 var(--hover);
  }
}
.close:hover,
.close:focus {
  box-shadow: inset -3.5em 0 0 0 var(--hover), inset 3.5em 0 0 0 var(--hover);
}

.raise:hover,
.raise:focus {
  box-shadow: 0 0.5em 0.5em -0.4em var(--hover);
  transform: translateY(-0.25em);
}

.up:hover,
.up:focus {
  box-shadow: inset 0 -3.25em 0 0 var(--hover);
}

.slide:hover,
.slide:focus {
  box-shadow: inset 6.5em 0 0 0 var(--hover);
}

.offset {
  box-shadow: 0.3em 0.3em 0 0 var(--color), inset 0.3em 0.3em 0 0 var(--color);
}
.offset:hover, .offset:focus {
  box-shadow: 0 0 0 0 var(--hover), inset 6em 3.5em 0 0 var(--hover);
}

.fill {
  --color: #a972cb;
  --hover: #cb72aa;
}

.pulse {
  --color: #ef6eae;
  --hover: #ef8f6e;
}

.close {
  --color: #ff7f82;
  --hover: #ffdc7f;
}

.raise {
  --color: #ffa260;
  --hover: #e5ff60;
}

.up {
  --color: #e4cb58;
  --hover: #94e458;
}

.slide {
  --color: #8fc866;
  --hover: #66c887;
}

.offset {
  --color: #19bc8b;
  --hover: #1973bc;
}

button {
  color: var(--color);
  transition: 0.25s;
}
button:hover, button:focus {
  border-color: var(--hover);
  color: #fff;
}

body {
  color: #fff;
  background: #17181c;
  font: 300 1em "Fira Sans", sans-serif;
  justify-content: center;
  align-content: center;
  align-items: center;
  text-align: center;
  min-height: 100vh;
  display: flex;
}

button {
  background: none;
  border: 2px solid;
  font: inherit;
  line-height: 1;
  margin: 0.5em;
  padding: 1em 2em;
}

h1 {
  font-weight: 400;
}

code {
  color: #e4cb58;
  font: inherit;
}





/* 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: 9em;
  max-width: 121em;
  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%;
  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% + 20px);
}
[tooltip][flow^="down"]::before,
[tooltip][flow^="down"]::after {
  left: 50%;
  transform: translate(-50%, .5em);
}

/* FLOW: LEFT */
[tooltip][flow^="left"]::before {
  top: 50%;
  border-right-width: 0;
  border-left-color: #333;
  left: calc(0em - 5px);
  transform: translate(-.5em, -50%);
}
[tooltip][flow^="left"]::after {
  top: 50%;
  right: calc(100% + 5px);
  transform: translate(-.5em, -50%);
}

/* FLOW: RIGHT */
[tooltip][flow^="right"]::before {
  top: 50%;
  border-left-width: 0;
  border-right-color: #333;
  right: calc(0em - 5px);
  transform: translate(.5em, -50%);
}
[tooltip][flow^="right"]::after {
  top: 50%;
  left: calc(100% + 5px);
  transform: translate(.5em, -50%);
}

/* KEYFRAMES */
@-webkit-keyframes tooltips-vert {
  to {
    opacity: .9;
    transform: translate(-50%, 0);
  }
}
@keyframes tooltips-vert {
  to {
    opacity: .9;
    transform: translate(-50%, 0);
  }
}

@-webkit-keyframes tooltips-horz {
  to {
    opacity: .9;
    transform: translate(0, -50%);
  }
}

@keyframes tooltips-horz {
  to {
    opacity: .9;
    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;
}