How to make a speech bubble with CSS?

Issue

Is it possible to style the following HTML structure to the image shown below with CSS only?

<div class="xyz-dialog">
 <div class="title"><span> Tip Title</span></div>
 <div class="body"> <span>Description</span></div>
</div>

Required design:

Solution

1. You can do it as below if we can add a container div in the HTML:

.container{
  background: gray;
  padding: 16px 10px;
  width:max-content;
}
.xyz-dialog {
  background: white;
  padding: 1rem;
  border-radius: 8px;
  position: relative;
  width: 300px;
}

.xyz-dialog::after {
  content: "";
  width: 0;
  height: 0;
  border-left: 10px solid transparent;
  border-right: 10px solid transparent;
  border-top: 10px solid white;
  position: absolute;
  top: 100%;
}
.body {
  margin-top:8px;
  color: gray;
  font-size: 15px
}

<div class= "container">
  <div class="xyz-dialog">
  <div class="title"><span> Tip Title</span></div>
  <div class="body"> <span>Description</span></div>
</div>

2. You can do it as below if we cannot touch the HTML structure:

.xyz-dialog {
  padding: 1rem;
  border-radius: 8px;
  position: relative;
  width: 300px;
}

.xyz-dialog::after {
  content: "";
  width: 0;
  height: 0;
  border-left: 10px solid transparent;
  border-right: 10px solid transparent;
  border-top: 10px solid white;
  position: absolute;
  top: calc(100% -1rem);
  left: 2rem;
}
.xyz-dialog::before {
  content: "";
  width: 100%;
  height: 100%;
  position: absolute;
  top: 0;
  left: 0;
  background: gray;
  z-index: -1;
}
.title {
  padding: 1rem;
  background: white;
  border-radius: 10px 10px 0 0;
  margin: 0 0 -5px 0;
}

.body {
  color: gray;
  font-size: 15px;
  background: white;
  margin: 0;
  padding: 1rem;
  border-radius: 0 0 10px 10px;
}

<div class="xyz-dialog">
  <div class="title"><span> Tip Title</span></div>
  <div class="body"> <span>Description</span></div>
</div>

Answered By - yousoumar