styles.css

@import url(https://fonts.googleapis.com/css?family=Montserrat);
@import url(https://cdn.jsdelivr.net/npm/bootstrap@4.4.1/dist/css/bootstrap.min.css);

:root {
    --loader-color: #005e54;
}

html, body, .full-height, .chat-container, div#messagesContainer {
  height: 100%;
}

div#recordingControls {
  min-height: 55px;
}

div.wave {
   display:flex;
  justify-content:center;
  align-items:center;
  margin-right: -48px;
}

.wave ul {
  /* background: rgba(0, 0, 0, 0.8);*/
  width:200px;
  height:45px;
  display:flex;
  justify-content:center;
  align-items:center;
  padding:0;
  margin:0;
  transition:ease 0.2s;
  position:relative;
}

.wave ul li{
  list-style:none;
  height:20px;
  width:4px;
  border-radius:10px;
  background: var(--loader-color);
  margin:0 3px;
  padding:0;
  animation-name: wave4;
  animation-duration: 0.3s;
  animation-iteration-count: infinite;
  animation-direction: alternate;
  transition:ease 0.2s;
}

.wave ul li:nth-child(2) {
    animation-name: wave2;
    animation-delay:0.2s;
}
.wave ul li:nth-child(3) {
    animation-name: wave3;
  animation-delay:0.23s;
  animation-duration: 0.4s;
}
.wave ul li:nth-child(4) {
    animation-name: wave4;
    animation-delay:0.1s;
  animation-duration: 0.3s;
}
.wave ul li:nth-child(5) {
  animation-delay:0.5s;
}
.wave ul li:nth-child(6) {
    animation-name: wave2;
  animation-duration: 0.5s;
}
.wave ul li:nth-child(8) {
    animation-name: wave4;
  animation-delay:0.4s;
  animation-duration: 0.25s;
}
.wave ul li:nth-child(9) {
    animation-name: wave3;
  animation-delay:0.15s;
}
.wave ul li:nth-child(10) {
  animation-delay:0.5s;
}
.wave ul li:nth-child(11) {
    animation-name: wave2;
  animation-duration: 0.5s;
}
.wave ul li:nth-child(12) {
    animation-name: wave3;
  animation-delay:0.4s;
  animation-duration: 0.25s;
}
.wave ul li:nth-child(13) {
    animation-name: wave4;
  animation-delay:0.15s;
}
.wave ul li:nth-child(14) {
    animation-name: wave4;

  animation-duration: 0.5s;
}
.wave ul li:nth-child(15) {
    animation-name: wave4;
  animation-delay:0.1s;
  animation-duration: 0.5s;
}

@keyframes wave1 {
    from {transform:scaleY(1);}
    to {transform:scaleY(0.5);}
}
@keyframes wave2 {
    from {transform:scaleY(0.3);}
    to {transform:scaleY(0.6);}
}
@keyframes wave3 {
    from {transform:scaleY(0.6);}
    to {transform:scaleY(0.8);}
}
@keyframes wave4 {
    from {transform:scaleY(0.2);}
    to {transform:scaleY(0.5);}
}

.user-bar {
  height: 55px;
  background: #005e54;
  color: #fff;
  padding: 0 8px;
  font-size: 24px;
  position: relative;
  z-index: 1;
}

.user-bar:after {
  content: "";
  display: table;
  clear: both;
}

.user-bar div {
  float: left;
  transform: translateY(-50%);
  position: relative;
  top: 50%;
}

.user-bar .actions {
  float: right;
  margin: 0 0 0 20px;
}

.user-bar .actions.more {
  margin: 0 12px 0 32px;
}

.user-bar .actions.attachment {
  margin: 0 0 0 30px;
}

.user-bar .actions.attachment i {
  display: block;
  transform: rotate(-45deg);
}

.user-bar .avatar {
  margin: 0 0 0 5px;
  width: 36px;
  height: 36px;
}

.user-bar .avatar img {
  border-radius: 50%;
  box-shadow: 0 1px 0 rgba(255, 255, 255, 0.1);
  display: block;
  width: 100%;
}

.user-bar .name {
  font-size: 17px;
  font-weight: 600;
  text-overflow: ellipsis;
  letter-spacing: 0.3px;
  margin: 0 0 0 8px;
  overflow: hidden;
  white-space: nowrap;
  width: 110px;
}

.user-bar .status {
  display: block;
  font-size: 13px;
  font-weight: 400;
  letter-spacing: 0;
}

.conversation {
  flex-grow: 1;
  position: relative;
  background: #efe7dd;
  z-index: 0;
  max-height: calc(100% - 55px);
}

.conversation ::-webkit-scrollbar {
  transition: all .5s;
  width: 5px;
  height: 1px;
  z-index: 10;
}

.conversation ::-webkit-scrollbar-track {
  background: transparent;
}

.conversation ::-webkit-scrollbar-thumb {
  background: #b3ada7;
}

.conversation .conversation-container {
  overflow-x: hidden;
  padding: 0 16px;
  margin-bottom: 5px;
  height: calc(100% - 93px);
  min-height: 100px;
}
.message {
  color: #000;
  clear: both;
  line-height: 18px;
  font-size: 15px;
  padding: 8px;
  position: relative;
  margin: 8px 0;
  max-width: 85%;
  word-wrap: break-word;
  z-index: -1;
}

.message:after {
  position: absolute;
  content: "";
  width: 0;
  height: 0;
  border-style: solid;
}
.message:first-child {
  margin: 16px 0 8px;
}

.message.received {
  background: #fff;
  border-radius: 0px 5px 5px 5px;
  float: left;
}

.message.received:after {
  border-width: 0px 10px 10px 0;
  border-color: transparent #fff transparent transparent;
  top: 0;
  left: -10px;
}

.message.sent {
  background: #e1ffc7;
  border-radius: 5px 0px 5px 5px;
  float: right;
}

.message.sent:after {
  border-width: 0px 0 10px 10px;
  border-color: transparent transparent transparent #e1ffc7;
  top: 0;
  right: -10px;
}

.conversation-compose {
  display: flex;
  flex-direction: row;
  align-items: flex-end;
  overflow: hidden;
  height: 50px;
  width: 100%;
  z-index: 2;
}

.conversation-compose div:not(.processing),
.conversation-compose input {
  background: #fff;
  height: 100%;
}
.conversation-compose .emoji {
  display: flex;
  align-items: center;
  justify-content: center;
  background: white;
  border-radius: 5px 0 0 5px;
  flex: 0 0 auto;
  margin-left: 8px;
  width: 48px;
}

.conversation-compose .input-msg {
  border: 0;
  flex: 1 1 auto;
  font-size: 16px;
  margin: 0;
  outline: none;
  min-width: 50px;
}

.conversation-compose .photo {
  flex: 0 0 auto;
  border-radius: 0 0 5px 0;
  text-align: center;
  position: relative;
  width: 48px;
}

.conversation-compose .photo:after {
  border-width: 0px 0 10px 10px;
  border-color: transparent transparent transparent #fff;
  border-style: solid;
  position: absolute;
  width: 0;
  height: 0;
  content: "";
  top: 0;
  right: -10px;
}

.conversation-compose .photo i {
  display: block;
  color: #7d8488;
  font-size: 24px;
  transform: translate(-50%, -50%);
  position: relative;
  top: 50%;
  left: 50%;
}

.conversation-compose .send {
  background: transparent !important;
  border: 0;
  cursor: pointer;
  flex: 0 0 auto;
  margin-left: 8px;
  margin-right: 8px;
  padding: 0;
  position: relative;
  outline: none;
}

.conversation-compose .send .circle {
  border-radius: 50%;
  color: #fff;
  position: relative;
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.conversation-compose .send .circle.start {
  background: #008a7c;
}
.conversation-compose .send .circle.stop {
  background: #fb283b;
}

.conversation-compose .send .circle.wait {
  background: gray;
}

.conversation-compose .send .circle i {
  font-size: 24px;
}

.conversation .status {
  display: flex;
  justify-content: center;
  font-size: 13px;
  height: 30px;
}

.conversation .status div {
  background-color: white;
  border-radius: 5px;
  margin: 5px;
  padding: 0 5px;
}
/* HTML: <div class="loader"></div> */
.processing {
  width: 120px;
  height: 20px;
  margin-top: 7px;
  margin-right: -48px;
  -webkit-mask: linear-gradient(90deg,#000 70%,#0000 0) left/20% 100%;
  background:
          linear-gradient(var(--loader-color) 0 0) left -25% top 0 /20% 100% no-repeat
          #ddd;
  animation: l7 1s infinite steps(6);
}
@keyframes l7 {
  100% {background-position: right -25% top 0}
}


.chat-container {
  display: flex;
  flex-direction: column;
}