* {
  box-sizing: border-box;
}
#boxdetailbooking {
    width:100%; 
    margin-left: auto;
    margin-right: auto;
    margin-top:55px;
    background-color: #000000;
    opacity: 0.8;
    padding-top: 15px;
    padding-bottom: 25px;
    padding-left: 30px;
    padding-right: 30px;    
    box-shadow: rgba(0, 0, 0, 0.35) 0px 5px 15px;
    border-radius: 15px;
    color: #FFFFFF;
    font-size: 18px;
}

#boxdetailkiri {
    float: left;
    width: 60%;
    padding-left: 30px;
}

#boxdetailkanan {
    float: right;
    width: 40%;
}

#stepbystepbox {
    margin-top: 50px;
    margin-bottom: 50px;

    width:100%; 
    margin-left: auto;
    margin-right: auto;

    opacity: 0.8;
    padding-top: 15px;
    padding-bottom: 25px;
    padding-left: 30px;
    padding-right: 30px;    

    color: #FFFFFF;
    font-size: 25px;    
    
}