* {
  box-sizing:border-box;
}
ul.a {list-style-type: disc; padding-left: 36px;}

.b-color {  color: white;}
.g-color {  color: #696969;}

.container_pk {
  padding: 24px;
  text-align:justify;
}

.container_center {
  display: flex;
  justify-content: center;
}

.row_pk:after {
  content: "";
  display: table;
  clear: both
}

.column-66 {
  float: left;
  width: 66.66666%;
  padding: 10px;
}

.column-33 {
  float: left;
  width: 33.33333%;
  padding: 10px;
}

.large-font {
  font-size: 48px;
}

.xlarge-font {
  font-size: 64px
}

.button {
  border: none;
  color: white;
  padding: 14px 28px;
  font-size: 16px;
  cursor: pointer;
  background-color: #4CAF50;
}


@media screen and (max-width: 750px) {
  .column-66,
  .column-33 {
    width: 100%;
    text-align: justify;
  }
  img {
    margin: auto;
  }
}
.responsive {
  max-width: 100%;
  height: auto;
}