* {
  box-sizing: border-box;
}

body {
  background-color: #f1f1f1;
  padding-left: 20px;
  font-family: Arial;
}

/* Center website */
.main {
  max-width: 1000px;
  margin: auto;
}

h1 {
  font-size: 50px;
  word-break: break-all;
}

.row {
  margin: 10px -16px;
}

/* Add padding BETWEEN each column */
.row,
.row > .column {
  padding: 8px;
}

/* Create three equal columns that floats next to each other */
.column {
  float: left;
  width: 50%;
  display: none; /* Hide all elements by default */
}



@media only screen and (max-width: 700px) {
    .column {
        width: 50%;
        margin: 6px 0;
    }
}

@media only screen and (max-width: 500px) {
    .column {
        width: 100%;
    }
}

/* Clear floats after rows */ 
.row:after {
  content: "";
  display: table;
  clear: both;
}

/* Content */
.content {
  background-color: white;
  padding: 5px;
}

/* The "show" class is added to the filtered elements */
.show {
  display: block;
}

/* Style the buttons */
.btn {
  border: none;
  outline: none;
  padding: 12px 16px;
  background-color: white;
  cursor: pointer;
}

.btn:hover {
  background-color: #ddd;
}

.btn.active {
  background-color: #666;
  color: white;
}

h1 {
    display: block;
    font-size: 2em;
    margin-block-start: 0.33em;
    margin-block-end: 0.33em;
    margin-inline-start: 0px;
    margin-inline-end: 0px;
    font-weight: bold;
}

h2 {
    display: block;
    font-size: 1em;
    margin-block-start: 0.33em;
    margin-block-end: 0.33em;
    margin-inline-start: 0px;
    margin-inline-end: 0px;
    font-weight: bold;
}

a:link {
    color: orange;
}

a:visited {
    color: orange;
}

a:hover {
    color: purple;
}

a:focus {
    color: green;
}

a:active {
    color: red;
}