body {font-family: Arial;}

.tab {
  overflow: hidden;
  border: 1px solid #ccc;
  background-color: #f1f1f1;
}

.tab button {
  background-color: inherit;
  float: left;
  border: 1px solid lightgrey;
  outline: none;
  cursor: pointer;
  padding: 14px 16px;
  transition: 0.3s;
  font-size: 17px;
  width: 50%;
}

.tab button:hover {
  background-color: #ddd;
}

.tab button.active {
  background-color: #ccc;
}

.tabcontent {
  display: none;
  padding: 10px 16px;
  border: 1px solid #ccc;
  border-top: none;
  margin-bottom: 1em;
}

img {
  border: 1px solid #F5F5F5;
  border-radius: 4px;
  padding: 5px;
  display: block;
  margin-left: auto;
  margin-right: auto;
}

img:hover {
  box-shadow: 0 0 2px 1px rgba(0, 140, 186, 0.5);
}

summary {
  cursor: pointer;
}

details {
  padding-inline-start: 1em;
  margin-bottom: 10px;
}

pre, code {
    background-color: #f8f8f8;
}

.caption {
  text-align: center;
  color: #747474;
  font-size: 12px;
  margin-top: 0.3em;
}

blockquote {
  font-size: 15px;
  border-left-width: 4px;
}