app.css

body, .ui-button, .ui-text {
  font-family: "Myriad Pro","Lucida Grande","Lucida Sans Unicode","Lucida Sans",Geneva,Verdana,sans-serif;
  color: hsl(0, 0%, 23%);
}

a, .linklike {
  color: hsl(210, 53%, 51%);
  text-decoration: underline;
  cursor: pointer;
}

.container {
  width: 40em;
  margin: 1em auto;
  position: relative;
}
video ~ .gif-maker-controls {
  opacity: 0;
  transition: opacity 0.2s, visibility 0s 0.2s;
  visibility: hidden;
}

video[src] ~ .gif-maker-controls,
.gif-maker-controls.busy {
  opacity: 1;
  visibility: visible;
  transition: opacity 0.2s, visibility 0s 0s;
}

.gif-maker-controls {
   overflow: hidden;
   height: 2.6em;
 }

.gif-maker-controls .recording {
  width: 77%;
  margin-right: 3%;
  float: left;
}

.gif-maker-controls .pause-recording {
  display: none;
  width: 20%;
  float: left;
  transition: all 0.2s, display 0s 0.21s;
}
.gif-maker-controls .recording ~ .pause-recording {
  display: block;
}

canvas {
  display: none;
}

.ui-button {
  text-decoration: none;
  border-radius: 0.1em;
  border: 0;
  width: 100%;
  cursor: pointer;
  color: #fff;
  font-size: 1em;
  line-height: 2;
  display: block;
  transition: all 0.2s;
  user-select: none;
  -moz-user-select: none;
  -webkit-user-select: none;
}

.ui-button:hover {
  background: hsla(210, 30%, 60%, 1);
}

.ui-button[disabled], .ui-button, .ui-button[disabled]:hover {
  background: hsla(0,0%, 50%, 1);
}

.ui-button[disabled].processing, .ui-button.processing {
  background-color: hsla(200, 30%, 60%, 1);
  background-image: -webkit-gradient(linear, 0 0, 100% 100%,
              color-stop(.15, rgba(255, 255, 255, .1)), color-stop(.15, transparent),
              color-stop(.5, transparent), color-stop(.5, rgba(255, 255, 255, .1)),
              color-stop(.75, rgba(255, 255, 255, .1)), color-stop(.75, transparent),
              to(transparent));
  background-image: -webkit-linear-gradient(-45deg, rgba(255, 255, 255, .1) 25%, transparent 25%,
            transparent 50%, rgba(255, 255, 255, .1) 50%, rgba(255, 255, 255, .1) 75%,
            transparent 75%, transparent);
  background-image: -moz-linear-gradient(-45deg, rgba(255, 255, 255, .1) 25%, transparent 25%,
            transparent 50%, rgba(255, 255, 255, .1) 50%, rgba(255, 255, 255, .1) 75%,
            transparent 75%, transparent);
  background-image: -ms-linear-gradient(-45deg, rgba(255, 255, 255, .1) 25%, transparent 25%,
            transparent 50%, rgba(255, 255, 255, .1) 50%, rgba(255, 255, 255, .1) 75%,
            transparent 75%, transparent);
  background-image: linear-gradient(-45deg, rgba(255, 255, 255, .1) 25%, transparent 25%,
            transparent 50%, rgba(255, 255, 255, .1) 50%, rgba(255, 255, 255, .1) 75%,
            transparent 75%, transparent);
  background-size: 1em 1em;
  background-position: 0 0;
  -webkit-animation: slide-processing-bg infinite 0.4s linear;
  -ms-animation: slide-processing-bg infinite 0.4s linear;
  -moz-animation: slide-processing-bg infinite 0.4s linear;
  animation: slide-processing-bg infinite 0.4s linear;
}

@keyframes slide-processing-bg {
  0% {
    background-position: 0 0;
  }
  100% {
    background-position: 0.9em 0;
  }
}
@-webkit-keyframes slide-processing-bg {
  0% {
    background-position: 0 0;
  }
  100% {
    background-position: 0.999em 0;
  }
}
@-moz-keyframes slide-processing-bg {
  0% {
    background-position: 0 0;
  }
  100% {
    background-position: 0.999em 0;
  }
}

.ui-button[disabled] {
  cursor: no-drop;
  opacity: 1;
}

.ui-button:active {
  box-shadow: inset 0 -0.1em 1em rgba(0, 0, 1, 0.5);
}

.request-stream.clicked {
  line-height: 1;
  font-size: 0.5em;
  opacity: 0.5;
}
.request-stream.clicked:hover {
  opacity: 1;
  font-size: 1em;
  line-height: 2;
}

.request-stream.clicked.streaming {
  background-color: hsla(0, 30%, 50%, 1);
}

.ui-button.to-danger:hover {
  background-color: hsla(0, 30%, 50%, 1);
}

.ui-button.to-imgur:hover, .ui-button.to-imgur.uploaded {
  background-color: hsla(83, 68%, 45%, 1);
}

.recording-toggle {
  background: hsla(120, 25%, 50%, 1);
}

.generated-gif {
  position: relative;
  text-align: center;
}

.generated-gif .controls {
  position: absolute;
  right: 1.5em;
  top: 2.5em;
  opacity: 0;
  transition: opacity 0.2s;
}

.ui-button.control {
  padding: 0 0.7em;
  display: inline-block;
  width: auto;
}

.generated-gif:hover .controls {
  opacity: 1;
}

.separate {
  border-top: 0.1em solid hsla(0,0%, 80%, 1);
  display: block;
  padding: 2em 1em 0;
  margin: 2em -1em 0;
}

.recording-indicator {
  background: hsla(0, 50%, 50%, 0.5);
  position: absolute;
  width: 1em;
  height: 1em;
  border-radius: 50%;
  right: 0.5em;
  margin-top: 0.5em;
  opacity: 0;
  transition: opacity 0.2s;
}

.recording-indicator.on {
  opacity: 1;
}

.generated-img {
  width: 640px;
  height: 480px;
}

.square .generated-img {
  width: 250px;
  height: 250px;
}

.small .generated-img {
  width: 200px;
  height: 150px;
}

.textish-form {
  display: inline-block;
}

.ui-text {
  border: none;
  background: transparent;
  display: inline;
  font-size: 1em;
}

.faqesq {
  background: white;
  font-size: 1em;
  line-height: 1.4;
}

.faq {
  font-size: 1.1em;
}

.faqa {
  margin-left: 0;
}

.faqa + .faq {
  margin-top: 1.5em;
}

.size-setting {
  display: inline-block;
  background: hsla(0,0%, 50%, 1);
  width: 1em;
  height: 1em;
  opacity: 0.5;
  cursor: pointer;
  position: relative;
  z-index: 3;
}

.size-setting.small {
  width: 1.5em;
  height: 1em;
}

.size-setting.square {
  width: 1.7em;
  height: 1.7em;
}

.size-setting.normal {
  width: 2em;
  height: 1.5em;
}
.size-setting.full {
  width: 3em;
  height: 2.25em;
}

input[name="gif-size"] {
  display: none;
}
input[name="gif-size"]:checked + .size-setting {
  opacity: 1;
}
.size-setting:after {
  box-sizing: border-box;
  -moz-box-sizing: border-box;
  background: transparent;
  border: 0.1em solid white;
  content: "";
  display: block;
  width: 80%;
  height: 80%;
  top: 10%;
  left: 10%;
  position: relative;
}

.gif-maker-size-controls {
  opacity: 0;
  transition: opacity 0.3s;
  text-align: right;
  padding-right: 0.8em;
  padding-bottom: 0.6em;
  margin-top: -3.2em;
}

video[src]:hover ~ .gif-maker-size-controls,
.gif-maker-size-controls:hover {
  opacity: 1;
}

video[data-state] ~ .gif-maker-size-controls{
  display: none;
}