main.css

#wrapper {
  width: 25em;
  margin: 3.3em auto;
}

body {
  font-family: Helvetica;
  background: #fff;
}

.chat ul {
  margin: 0em;
  padding: 0em;
  list-style: none;
}

.user-message {
  margin-top: 1em;
  display: inline-block;
  font-size: 14px;
  line-height: 1.5em;
  padding: 1em;
  border-radius: 2em;
  line-height: 1em;
  font-weight: 100;
  text-align: left;
  color: #999;
  border-color: rgba(153, 153, 153, 0.3);
  border-style: solid;
  border-width: .08em;
  width: 88%;
  height: 1em;
}

.user-message:hover {
  color: #ccc;
  cursor: text;
}

.message-left .message-time {
  display: block;
  font-size: 12px;
  text-align: left;
  padding-left: 1.1em;
  padding-top: 0.3em;
  color: #ccc;
  font-family: Courier;
}

.message-right .message-time {
  display: block;
  font-size: 12px;
  text-align: right;
  padding-right: 1.1em;
  padding-top: 0.3em;
  color: #ccc;
  font-family: Courier;
}

.message-left {
  text-align: left;
  margin-bottom: 1em;
}

.message-left .message-text {
  max-width: 80%;
  display: inline-block;
  background: #fff;
  padding: 1em;
  font-size: 14px;
  color: #999;
  border-radius: 2em;
  font-weight: 100;
  line-height: 1.5em;
}

.message-right {
  text-align: right;
  margin-bottom: 1em;
}

.message-right .message-text {
  line-height: 1.5em;
  display: inline-block;
  background: #5ca6fa;
  padding: 1em;
  font-size: 14px;
  color: #fff;
  border-radius: 2em;
  line-height: 1.5em;
  font-weight: 100;
  text-align: left;
}

.chat {
  border-radius: 2em;
  padding: 1.25em;
  background: #f5f7fa;
}

.chat-container {
  height: 30em;
  overflow-y: scroll;
  /* padding-right: 1em; */
}

.spinme-right {
  display: inline-block;
  padding: 15px 20px;
  font-size: 14px;
  border-radius: 30px;
  line-height: 1.25em;
  font-weight: 100;
  opacity: 0.2;
}

.spinme-left {
  display: inline-block;
  padding: 15px 20px;
  font-size: 14px;
  color: #ccc;
  border-radius: 30px;
  line-height: 1.25em;
  font-weight: 100;
  opacity: 0.2;
}

.spinner {
  margin: 0;
  width: 30px;
  text-align: center;
}

.spinner>div {
  width: 10px;
  height: 10px;
  border-radius: 100%;
  display: inline-block;
  -webkit-animation: sk-bouncedelay 1.4s infinite ease-in-out both;
  animation: sk-bouncedelay 1.4s infinite ease-in-out both;
  background: rgba(0, 0, 0, 1);
}

.spinner .bounce1 {
  -webkit-animation-delay: -0.32s;
  animation-delay: -0.32s;
}

.spinner .bounce2 {
  -webkit-animation-delay: -0.16s;
  animation-delay: -0.16s;
}

@-webkit-keyframes sk-bouncedelay {
  0%, 80%, 100% {
    -webkit-transform: scale(0)
  }
  40% {
    -webkit-transform: scale(1.0)
  }
}

@keyframes sk-bouncedelay {
  0%, 80%, 100% {
    -webkit-transform: scale(0);
    transform: scale(0);
  }
  40% {
    -webkit-transform: scale(1.0);
    transform: scale(1.0);
  }
}

@media only screen and (max-width: 600px) {
  #wrapper {
    width: 90vw !important;
    height: 60vh !important;
  }
}

/* styling for link */

a, a:visited {
  color: pink;
  text-decoration: none;
}

a:hover {
  color: lightblue;
  text-decoration: none;
}

a:active {
  color: violet;
  text-decoration: none;
}