how-it-works{
      font-family: 'Open Sans Condensed', sans-serif;
    color: #aaa;
    text-align: center;
   
    padding-top: 90px;
    font-weight: bold;
    background-color: #eee;
    height: 140px;
    font-size: 23px;
    
}
#how-it-works .container my-3 py-5 text-center
{
    background-color: aliceblue;
}

.how-it-works hr{
    width: 20%;
    margin-top: 25px;
    color: deepskyblue;
       
}
#how-it-works .col h4{
    color: gray;
}
*{
    margin: 0;
    padding: 0;
    text-decoration: none;
}
h1{
    font-size: 36px;
    font-weight: bold;
}
#how-it-works img{
    margin-top: -30px;
    margin-bottom: 30px;
}
#how-it-works .col-l{
    background-color: aliceblue;
}
#how-it-works{
    background-color: whitesmoke;
  
}
#how-it-works  p{
    font-weight: 100;
    padding-top: 40px;

}

.card-body one p{
    color: deepskyblue;
    font-size: 51px;
    border: 1px;
    border-color: white;
    background-color: whitesmoke;
    border-radius: 50%;
    width: 40%;
    height: 80px;
    line-height: 0%;
    box-shadow: 0 10px 10px rgba(0,0,0,.5);
    text-align: center;
    display: inline-block;
    margin-top: -30px;
        
    
        
}
.card-body{
    
    width: 100%;

  
}
.card-body p{
    line-height: 1.6;
    
}
.card{
    width: 100%;
    margin-top: 30px;
    background-color: aliceblue;
}
.card-body h4{
    color: aliceblue;
    padding-top: 10px;
    width: 100%;
    text-align: center;
    display: inline-block;
    margin-bottom: -20px;
    font-weight: bold;
    font-size: 32px;
}

.card-body p{
    color: whitesmoke;
    width: 100%;

    font-size: 17px;
    padding-top: -30px;
    
    
}
.col h4{
    margin-bottom: -53px;
}
.col h1{
    font-size: 54px;
    color: deepskyblue;;
}
.card-body w p {
    font-size: 19;
   margin-top: 12px;
  
}
.too-busy{
   
    line-height: 33px;
    letter-spacing: 3.7;
    margin: 70px;
    font-size: 25px;
    color: deepskyblue;
    }
.too-busy too p{
    font-weight: 69;
    font-family: serif;
    line-height: 1.5;
}
.too-busy write-up p{
    width: 50%;
    font-size: 17px;
    color: grey;
  line-height: 29px;
}
@media(max-width: 500px){
    .too-busy{
        padding: 90px;
       width: 100%;
        display: inline;
     
        margin: 0px;
     
        
    }
    .too-busy write-up p{
        width: 100%;
    }
}

bu button{
   
    background-color: dodgerblue;
    color: #fff;
    border-radius: 5px;
    height: 55px;
    width: 233px;
    margin-top: 30px;
    cursor: pointer;
    margin-bottom: 134PX;
    
}
button p{
   font-size: 30px; 
    padding-top: 4px;
}
#myDIV{
    display: none;
}
form{
  width: 400px ;
    height: 730px;
  
    
 }
@media(max-width: 500px){
    #myDIV form{
        width: 280px;
      
    }
}
<iframe src='https://webchat.botframework.com/embed/infobot2-bot?s=YOUR_SECRET_HERE'  style='min-width: 400px; width: 100%; min-height: 500px;'></iframe>