html {
  font-family: "Open Sans", "Canva Sans", "Noto Sans Variable", Noto Sans, -apple-system, BlinkMacSystemFont, Segoe UI, Helvetica, Arial, sans-serif;
  font-size: 14pt;

  min-height: 500px;

  background-color: #020204;

  /* create some white dots in the background */
  box-shadow: 1px 1px 2px;
}

/* use a mask to apply a repeated radial gradiant as soft white dots in the background */
html::before {
  position: absolute;
  top: 0;
  right: 0;
  bottom: 0;
  left: 0;
  /*background: radial-gradient(rgba(255, 255, 255, 0.1), transparent) 0 0/0.2em 0.2em space;*/
  -webkit-mask: var(--mask);
  mask: var(--mask);
  content: "";
}

body {
  max-width: 1280px;
  margin: auto;
  background: #f2f2f2;
}

.center {
  /*display: flex;*/
  justify-content: center;
}

header {
  
  text-align: center;
  margin: 0 20%;
  display: flex;
  align-items: center;
  justify-content: center
}

header h1 {
  width: 80%;
}

header img {
  max-height: 150px;
  max-width: 150px;
}

#site-logo {
  flex-basis: 40%;
  position: relative;
  z-index: -1;
}

/******** navigation ******************/

nav {
  background: rgba(28, 40, 56, 0.7);
  border-radius: 5px;
  border: 2px solid;
  /*rgba(28, 40, 56, 0.5);*/
  padding: 20px;
  position: sticky;
}

ul {
  list-style-type: none;
  margin: 0;
  padding: 0;
  overflow: hidden;
  /*background-color: rgba(28, 40, 56, 0.5);*/
  position: -webkit-sticky;
  /* Safari */
  position: sticky;
  top: 0;
  width: 100%;
}

li {
  float: left;
}

li a {
  display: block;
  color: white;
  text-align: center;
  padding: 14px 16px;
  text-decoration: none;
}

/* Change the link color to #111 (black) on hover */
li a:hover {
  background-color: #333;
}

.active {
  background-color: white;
  color: rgb(83, 123, 172);
}

/******** footer ************************/

footer {
  background: rgba(108, 108, 109, 0.7);
  border-radius: 5px;
  border: 2px solid;
  /*rgba(28, 40, 56, 0.5);*/
  padding: 20px;
  color: #000;
}

footer a {
  display: inline;
  color: white;
  text-align: center;
  padding: 14px 16px;
  text-decoration: none;
}

footer a:hover {
  background-color: rgba(28, 40, 56, 0.7);
}

/******** main content ******************/
main {
  padding: 1em;
}

/******** tables within the side ********/

/* Add a gray right border to all list items, except the last item (last-child) */
li {
  border-right: 1px solid #bbb;
}

li:last-child {
  border-right: none;
}

tr:nth-child(even) {
  background-color: #f2f2f2;
}

th,
td {
  padding: 15px;
  text-align: left;
}

th {
  background-color: #537bac;
  color: white;
}

img {
  max-width: 100%;
  height: auto;
}