html {
    margin:    0 auto;
    max-width: 900px;
}

table {
  cellspacing: 20px;
  width: 100%;
}

body {
  min-height: 100vh;
  margin-left: 20px;
  margin-right: 20px;
  background-color: var(--bg);
  color: var(--text);
}

header {
  min-height: 30px;
  margin-top:20px; 
}

footer {
  min-height: 40px;
}

body {
  display: flex;
  flex-direction: column;
}

main {
  flex: 1;
}

html * {
  font-family: monospace;
}

.footer-text {
  font-size: 8px;
  /* padding: 0;
  margin: 2px; */
}

.centering-div{
  display: block;
  margin-left: auto;
  margin-right: auto;
  width:48px;
}

.nav-ul {
  display: inline;
}

.nav-li {
  float: left;
  list-style-type: none;
  margin-right: 16px;
  padding: 0; 
}

:root {
  --text: #000;
  --bg: #fff;
  --blinkercol: #000
}

@media (prefers-color-scheme: dark) {
  :root {
    --text: #fff;
    --bg: #000;
    --blinkercol: #0f0
  }
}

a:link {
  color:var(--text);
}

a:visited {
  color:var(--text);
}

a:hover {
  color:#115511;
}

a:active {
  color:#00FF00;
}

.fig-cap {
  text-align: center;
}