.row {
  display: -ms-flexbox;
  display: flex;
  -ms-flex-wrap: wrap;
  flex-wrap: wrap;
  margin-right: -15px;
  margin-left: -15px;
}

.col-sm-6 {
  -ms-flex: 0 0 50%;
  flex: 0 0 50%;
  max-width: 50%;
  position: relative;
  width: 100%;
  padding: 15px;
}

.card {
  position: relative;
  display: -ms-flexbox;
  display: flex;
  -ms-flex-direction: column;
  flex-direction: column;
  min-width: 0;
  word-wrap: break-word;
  background-color: #fff;
  background-clip: border-box;
  border: 1px solid rgba(0,0,0,.125);
  border-radius: .25rem;
  height: 360px;
}

.card:hover{ /* when mouse hover over pricing table */
  transform: scale(1.05);
  transition: all .5s;
  z-index: 100;
  box-shadow: 0 0 10px gray;
}

.card-body {
  -ms-flex: 1 1 auto;
  flex: 1 1 auto;
  padding: 1.25rem;
}

.btn {
  display: inline-block;
  font-weight: 400;
  color: #212529;
  text-align: center;
  vertical-align: middle;
  -webkit-user-select: none;
  -moz-user-select: none;
  -ms-user-select: none;
  user-select: none;
  background-color: transparent;
  border: 1px solid transparent;
  padding: .375rem .75rem;
  font-size: 1rem;
  line-height: 1.5;
  border-radius: .25rem;
  transition: color .15s ease-in-out,background-color .15s ease-in-out,border-color .15s ease-in-out,box-shadow .15s ease-in-out;
}

.btn-primary {
  color: #fff;
  background-color: #007bff;
  border-color: #007bff;
}

.text-muted {
  color: #6c757d!important;
  margin-top: 0;
}