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

table, th, td {
  border: 1px solid black;
}

header {
   background-color: black;
}

.ulmenu {
  background-color: rgb(20, 20, 20);
  text-align: center;
  padding:20px 20px 20px 20px;
  margin: auto;
}

.amenu {
  color: ghostwhite;
  font-size: 24px;
  font-family: 'Liberation Sans', Verdana, Geneva, Tahoma, sans-serif;
  margin-right: 10px;
  margin-left: 10px;
  text-decoration: none;
}

body {
  background-color: rgb(230, 230, 230);
  margin: 0;
  padding:0;
  padding-bottom: 300px;
}

main {
  margin: 0 auto;
  max-width: 1000px;
}

article {
  font-size: 24px;
  font-family: 'Noto Serif', 'Palatino Linotype', Palatino, serif;
  margin-left: 7%;
  margin-right: 7%;
  line-height: 1.5em;
}

@media (max-width: 700px) {
  article {
    margin-left: 5%;
    margin-right: 5%;
  }
}

h1, h2, h3, h4, h5, h6 {
  font-family:  Roboto, 'Noto Sans', Verdana, sans-serif;
}

h5 {
  font-size: 24px;
}

h4 {
  font-size: 26px;
}

h3 {
  font-size: 28px;
}

h2 {
  font-size: 30px;
}

h1 {
  font-size: 30px;
}

iframe {
  display:block;
  margin:auto;
}

.source {
	font-size: 0.8em;
  
}

.ulcontents {
  text-align: left;
  width: 40%;
  position:relative;
  left: 25%;
}

@media (max-width: 700px) {
  .ulcontents {
    text-align: left;
    width: 70%;
    position:relative;
    left: 10%;
  }
}

ul li {
  margin-bottom: 10px;
}

a {
  color: rgb(60, 0, 0);
}

a:hover {
  color: rgb(190, 0, 0);
  text-decoration: underline;
}

details { 
  margin: 1rem 0; 
}

summary {
   cursor: pointer; font-weight: 600;
   text-decoration: underline; 
}