body {
  margin: 0;
  background: skyblue;
}

.container {
  padding: 32px;
}

.messages {
  margin: 0;
  padding: 0;
  list-style: none;
}

.messages li {
  display: flex;
}

.messages li + li {
  margin-top: 32px;
}

li.right-side {
  flex-direction: row-reverse;
}

.pic {
  /* background: pink; */
  width: 80px;
  text-align: center;
}

.pic img {
  width: 48px;
  height: 48px;
  border-radius: 50%;
}

.text {
  background: #fff;
  border-radius: 8px;
  padding: 16px 24px;
  max-width: 60%;
  line-height: 1.8;
  position: relative;
}

.text::before {
  content: '';
  width: 0;
  height: 0;
  /* border: 8px solid #fff; */
  border: 8px solid transparent;
  position: absolute;
}

.left-side .text::before {
  top: 12px;
  left: -16px;
  border-right-color: #fff;
}

.right-side .text::before {
  top: 12px;
  right: -16px;
  border-left-color: #fff;
}