.categories {
  padding: 20px;
  width: 100%;
  max-width: 1280px;
  margin: 0 auto;
  /*display:flex; flex-flow:row wrap; justify-content:flex-start; align-items:flex-start;*/

}
.categories h2 {
  font-size: 1.5rem;
  padding-bottom: 5px;
}
.categories a {
  /*flex:1;*/
  display: inline-block;
  float: left;
  width: calc(25% - 10px);
  box-sizing: border-box;
  white-space: nowrap;
  padding: 20px 40px;
  border-radius: 4px;
  margin: 5px;
  background-color: rgba(140, 0, 255, 0.3);
}
.categories a:link,
.categories a:visited,
.categories a:hover,
.categories a:active {
  text-decoration: none;
}
.categories a:link,
.categories a:visited {
  color: #d1a0ff;
}
.categories a:hover,
.categories a:active {
  color: #fff;
  background-color: rgba(140, 0, 255, 0.5);
}
.notes {
  max-width: 960px;
  width: 100%;
  margin: 0 auto;
}
@media (max-width: 1000px) {
  .categories a {
    width: calc(33% - 10px);
  }
}
@media (max-width: 800px) {
  .categories a {
    width: calc(50% - 10px);
  }
}
@media (max-width: 550px) {
  .categories {
    padding: 20px 0;
  }
  .categories a {
    width: 100%;
    margin: 5px 0;
    border-radius: 0;
  }
}