.center {
  margin: auto;
  width: 50%;
  padding: 10px;
}
h1 {
  font-family: "Helvetica", "Arial", sans-serif;
  font-size: 80px;
}
h2 {
  font-family: "Helvetica", "Arial", sans-serif;
  font-size: 40px;
}
h3 {
  font-family: "Helvetica", "Arial", sans-serif;
  font-size: 30px;
}
h4 {
  font-family: "Helvetica", "Arial", sans-serif;
  font-size: 25px;
}
p {
  font-family: "Helvetica", "Arial", sans-serif;
  font-size: 25px;
  line-height: 1.8;
}
ol {
  font-size: 20px;
  font-family: "Helvetica", "Arial", sans-serif;
}
a:hover {
  color:#3C92B7;
  text-decoration: none;
}
a:link {
  text-decoration: none;
}
code {
  color: crimson;
}
input[type=checkbox] {
  display: none;
}
.imgZoom {
  margin: 100px;
  transition: transform 0.25s ease;
  cursor: zoom-in;
}

input[type=checkbox]:checked ~ label > img {
  transform: scale(1.5);
  cursor: zoom-out;
}
.column {
  float: left;
  width: 31%;
  padding: 5px;
}
.row::after {
  content: "";
  clear: both;
  display: table;
}
.column2 {
  float: left;
  width: 45%;
  padding: 5px;
}
.row2::after {
  content: "";
  clear: both;
  display: table;
}
table, th, td {
  border: 1px solid black;
  border-collapse: collapse;
  font-family: "Helvetica", "Arial", sans-serif;
  font-size: 25px
}
th, td {
  padding: 15px;
}
.image_box {
  position:relative
}
.banner {
  width: 100%;
  display: block;
}
.banner > .banner_image {
  width: 100%;
  display: block;
}
body {
  margin: 0px
}
.bg-mask {
  background-color: #333;
  transition: 0.25s ease-in;
}

.navbar {
  position: sticky;
  top: 0;
  z-index: 1;
}
.navbar ul {
  list-style-type: none;
  margin: 0;
  padding: 0;
  overflow: hidden;
  background-color: #333;
  text-align: center;
  font-size: 30px;
  font-family: "Helvetica", "Arial", sans-serif;

}
ul {
  font-family: "Helvetica", "Arial", sans-serif;
  font-size: 25px;
}
pre {
  font-size: 20px;
}
.footer {
  background-color: #333;
  left: 0;
  bottom: 0;
  width: 100%;
  margin: 0;
  padding: 0;
  z-index: -1;
}
.footer p {
  text-align: center;
  padding: 0;
  margin: 0;
  font-size: 15px;
  color: white;
}

.navbar li {
  float: left;
}
.navbar li a {
  display: block;
  color: white;
  text-align: center;
  padding: 14px 16px;
  text-decoration: none;
}
.navbar a:hover {
  background-color: #3C92B7
}
ol {
  font-size: 25px;
}
.active {
  background-color: #3C92B7;
}
a.active {
  color: white;
}