urtc-sdk-web/examples/pureJS/css/index.css

.App {
  margin-top: 60px;
  font-family: 'Avenir', Helvetica, Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-align: center;
  color: #2c3e50;
}

.room {
  max-width: 640px;
  margin: 0 auto;
}

.room .local-stream,
.room .remote-stream {
  text-align: left;
}

.room button {
  padding: 8px 0;
  display: inline-block;
  width: 100%;
  border-radius: 6px;
  cursor: pointer;
  text-align: center;
  ;
}

.room input:visited,
.room button:focus,
.room button:visited,
.room button:hover,
.room button:active {
  outline: none;
}