leon/app/css/style.css

@import url(https://fonts.googleapis.com/css?family=Open+Sans:400,600,700,800);

html, body, div, span, applet, object, iframes,
h1, h2, h3, h4, h5, h6, p, blockquote, pre,
a, abbr, acronym, address, big, cite, code,
del, dfn, em, img, ins, kbd, q, s, samp,
small, strike, sub, sup, tt, var,
u, i, center,
dl, dt, dd, ol, ul, li,
fieldset, form, label, legend,
table, caption, tbody, tfoot, thead, tr, th, td,
article, aside, canvas, details, embed,
figure, figcaption, footer, header, hgroup,
menu, nav, output, ruby, section, summary,
time, mark, audio, video {
  margin: 0;
  padding: 0;
  border: 0;
  font-size: 100%;
  font: inherit;
  vertical-align: baseline;
}

article, aside, details, figcaption, figure,
footer, header, hgroup, menu, nav, section {
  display: block;
}

blockquote, q {
  quotes: none;
}

blockquote:before, blockquote:after,
q:before, q:after {
  content: '';
  content: none;
}

table {
  border-collapse: collapse;
  border-spacing: 0;
}

* {
  box-sizing: border-box;
  outline: none;
}

a {
  color: inherit;
}

ul li {
  margin-left: 20px;
}

body {
  color: #FFF;
  background-color: #151718;
  font-family: 'Open Sans', sans-serif;
  font-weight: 400;
}
body > * {
  transition: opacity .5s;
}
body.settingup > * {
  opacity: 0;
}
body.settingup::after {
  position: absolute;
  content: '';
  width: 32px;
  height: 32px;
  background-color: #777;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  border-radius: 50%;
  animation: scaleout .6s infinite ease-in-out;
}
@keyframes scaleout {
  0% {
    transform: scale(0);
  }
  100% {
    transform: scale(1.0);
    opacity: 0;
  }
}

main {
  position: absolute;
  width: 63%;
  top: 0;
  left: 50%;
  height: 100%;
  transform: translate(-50%, 0);
}

footer {
  position: absolute;
  text-align: center;
  left: 50%;
  bottom: 0;
  transform: translate(-50%, -50%);
}

input {
  text-align: center;
  color: #FFF;
  width: 100%;
  border: none;
  border-bottom: 2px solid #FFF;
  background: none;
  font-weight: 400;
  font-size: 4em;
  padding-right: 39px;
}

small {
  color: #FFF;
  font-size: .7em;
}

.hide {
  display: none;
}

#logo {
  background: no-repeat url(../img/logo.svg);
  margin: 0 auto;
  width: 40px;
  height: 40px;
}

#feed {
  position: absolute;
  width: 100%;
  top: 10%;
  height: 50%;
  overflow-y: auto;
  border: 2px solid #FFF;
  border-radius: 12px;
}
#feed::-webkit-scrollbar {
  width: 6px;
}
#feed::-webkit-scrollbar-thumb {
  background-color: rgba(255, 255, 255, .2);
  border-radius: 12px;
}

#no-bubble {
  margin-top: 64px;
  text-align: center;
}

#is-typing {
  position: absolute;
  top: 59%;
  padding: 0 8px;
  opacity: 0;
  margin-top: 20px;
  transition: opacity .3s;
}
#is-typing.on {
  opacity: 1;
}

#is-typing .circle {
  display: inline-block;
  border-radius: 50%;
  width: 10px;
  height: 10px;
  background-color: #FFF;
  transform: scale(1);
}
#is-typing .circle:nth-child(1) {
  animation: typing .2s linear infinite alternate;
  background-color: #0071F0;
}
#is-typing .circle:nth-child(2) {
  animation: typing .2s .2s linear infinite alternate;
  background-color: #FFF;
}
#is-typing .circle:nth-child(3) {
  animation: typing .2s linear infinite alternate;
  background-color: #EC297A;
}
@keyframes typing {
  100% {
    transform: scale(1.5);
  }
}

.bubble-container {
  padding: 6px;
}
.bubble-container.me {
  text-align: right;
}
.bubble-container.leon {
  text-align: left;
}

.bubble {
  padding: 6px 12px;
  border-radius: 16px;
  display: inline-block;
  max-width: 60%;
  word-break: break-word;
  text-align: left;
  opacity: 0;
  animation: fadeIn .2s ease-in forwards;
}
#feed .me .bubble {
  background-color: #1C75DB;
  color: #FFF;
  right: 0;
}
#feed .leon .bubble {
  background-color: #EEE;
  color: #151718;
}
@keyframes fadeIn {
  100% {
    opacity: 1;
  }
}

#input-container {
  position: absolute;
  width: 100%;
  bottom: 25%;
}

#mic-container {
  position: absolute;
  right: 0;
  margin-top: 38px;
}

.italic {
  font-style: italic;
}

button {
  position: absolute;
  border: none;
  cursor: pointer;
  height: 26px;
  width: 26px;
  border-radius: 50%;
  background-color: #888;
  -webkit-mask-image: url(../img/mic.svg);
  mask-image: url(../img/mic.svg);
  transition: background-color .2s;
}
button:not(.enabled) {
  margin-left: -26px;
}
button:hover {
  background-color: #FFF;
}
button.enabled {
  background-color: #00E676;
}
button.enabled + #sonar {
  width: 26px;
  height: 26px;
  border-radius: 50%;
  opacity: .3;
  background-color: #575757;
  pointer-events: none;
  animation: sonar 1.3s linear infinite;
}
@keyframes sonar {
  25% {
    transform: scale(1.5);
  }
  50% {
    transform: scale(1.2);
  }
  60% {
    transform: scale(1.5);
  }
  75% {
    transform: scale(2);
  }
  100% {
    transform: scale(1);
  }
}