@import "https://cdnjs.cloudflare.com/ajax/libs/normalize/8.0.0/normalize.min.css";
@import url('https://fonts.googleapis.com/css?family=Orbitron');

* {
  box-sizing: border-box;
}

body {
  font-family: OpenSans, Noto, Arial, Helvetica, sans-serif;
  color: #2f2e2b;
  text-align: center;
  background: hsl(234, 15%, 14%);
}

.v-align-row {
  display: flex;
  justify-content: space-around;
  align-content: center;
  align-items: center;
  flex-flow: row wrap;
}

.v-align-column {
  display: flex;
  justify-content: flex-start;
  align-content: center;
  align-items: center;
  flex-flow: column wrap;
}

.txt-shadow-subtle {
  text-shadow: 0 1px 3px rgba(0,0,0,.1);
}

a, a:visited, a:active, a:hover {
  color: inherit;
  text-decoration: none;
  text-decoration: underline;
  transition: all 160ms ease-out;
}

a:hover, a:active {
  font-weight: bold;
}

hr {
  display: block;
  width: 70%;
  min-width: 300px;
  margin: 1em auto;
  outline: 0;
  border: 0;
  border-bottom: 1px solid #1f4860;
}

footer {
  position: absolute;
  text-align: center;
  bottom: 0;
  left: 0;
  width: 100%;
  padding: .5em;
  color: #5a5a69;
}


.hero {
  justify-content: center;
  overflow: hidden;
  margin: 0 0 1em 0;
  padding: 1em;
  width: 100%;
  height: auto;
  color: #fff;
  font-family: 'Orbitron', sans-serif;
  font-size: 1.5rem;
}

.hero > h1 {
  display: inline-block;
  margin: .1em .5em;
}

.converter {
  margin: 1em auto;
  min-height: 300px;
}

.conversion-types {
  margin: 1em auto;
  padding: 1em;
  width: calc(100% - 1em);
  max-width: 380px;
  -webkit-user-select: none;
  -moz-user-select: none;
  user-select: none;
  overflow: hidden;
  background: #fff;
  border-radius: 4px;
  transition: all 120ms ease-out;
}

.conversion-types:hover {
  border-radius: 4px;
}

.conversion-types > .active-type {
  display: block;
  width: 100%;
  margin: 5px auto;
  text-align: center;
}

.conversion-types .type-selector {
  justify-content: center;
  width: auto;
  height: 0;
  opacity: 0;
  margin: 0 auto;
  -webkit-transform: scale(0);
  -moz-transform: scale(0);
  transform: scale(0);
  -webkit-pointer-events: none;
  -moz-pointer-events: none;
  pointer-events: none;
  transition: all 140ms ease-out, opacity 200ms ease-out;
}

.conversion-types:hover .type-selector {
  height: 360px;
  opacity: 1;
  -webkit-transform: scale(1);
  -moz-transform: scale(1);
  transform: scale(1);
  -webkit-pointer-events: all;
  -moz-pointer-events: all;
  pointer-events: all;
  margin: 5px auto;
}

.conversion-types .type-selector > span {
  padding: 6px 8px;
  margin: 4px;
  font-size: 1.06em;
  border-radius: 2px;
  border: 1px solid rgba(0,0,0,.07);
  cursor: pointer;
  background: #fff;
  transition: all 120ms ease-out;
}

.conversion-types .type-selector > span.active {
  border: 1px solid hsl(46, 72%, 66%);
}

.conversion-inputs {
  width: 100%;
  margin: 1em auto;
}

.conversion-inputs > * {
  display: inline-block;
  border: 0;
  vertical-align: middle;
}

.conversion-inputs input {
  display: inline-block;
  text-align: center;
  padding: 8px 4px;
  margin: 0 5px;
  border: 0;
  outline: 0;
  width: 240px;
  font-size: 1.1em;
  border-radius: 2px 2px 0 0;
}

.conversion-inputs .equals {
  display: inline-block;
  font-size: 2em;
  margin: 1em;
  color: #fff;
}

.unitA, .unitB {
  padding: 1em 1em 3em 1em;
}

.unit-picker {
  position: absolute;
  display: block;
  overflow: hidden;
  margin: 0 5px 0 5px;
  padding: 0;
  height: auto;
  width: 240px;
  background: #fff;
  border-radius: 0 0 2px 2px;
  -webkit-user-select: none;
  -moz-user-select: none;
  user-select: none;
}

.unit-picker:hover {
  z-index: 2;
}

.unit-picker > span {
  position: relative;
  display: block;
  opacity: 0;
  height: 0;
  margin: 0 auto;
  padding: 0;
  width: 100%;
  cursor: pointer;
  -webkit-pointer-events: none;
  -moz-pointer-events: none;
  pointer-events: none;
  transition: all 120ms ease-out;
}

.unit-picker > span.active, .unit-picker:hover > span {
  height: 30px;
  line-height: 30px;
  opacity: 1;
  -webkit-pointer-events: all;
  -moz-pointer-events: all;
  pointer-events: all;
}

.unit-picker > span:hover {
  background: hsl(0, 0%, 88%);
}
.unit-picker > span.active {
  background: hsl(0, 0%, 95%);
}

@media all and (max-width: 640px) {
  .conversion-inputs .equals {
    display: block;
    margin: 10px auto;
    width: 100%;
  }
}