.container-extended {
  width:100%;
  margin-top:50px;
  margin-bottom:50px;
}

.container-extended p {
  margin-bottom:0;
}

.header-section {
  width:100%;
  margin-top:20px;
  margin-bottom:20px;
  text-align:center;
}

.header-div {
  display:inline-block;
}

.header-div::after {
  content:'';
  display:block;
  position:relative;
  width:120%;
  margin-left:-10%;
  height:3px;
  background-color:black;
  /*top:10px;*/
}

.card-div-container {
  text-align:center;
  width:100%;
}

.card-div {
  display:inline-block;
  width:calc(25% - 24px);
  margin:5px 7px;
  height:200px;
  border:1px solid black;
}