*,
*::before,
*::after {
  box-sizing: border-box;
}

body {
  margin: 8px 8px 8px 210px;
  background-color: yellow;
  color: black;
  font-family: Arial, Helvetica, sans-serif;
  overflow-wrap: break-word;
}

a:link {
  color: black;
}

a:visited {
  color: #666666;
}

a:active {
  color: red;
}

a:focus-visible {
  outline: 2px solid black;
  background-color: black;
  color: yellow;
}

h1 {
  font-size: 1em;
  font-weight: bold;
  margin: 0;
}

h1.big {
  font-size: 2em;
}

h2 {
  font-size: 1.15em;
  font-weight: bold;
  margin: 0;
}

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

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  border: 0;
}

#sg-menu {
  position: fixed;
  top: 8px;
  left: 8px;
  width: 190px;
  bottom: 8px;
  overflow-y: auto;
  background-color: yellow;
  color: black;
  font-family: Arial, Helvetica, sans-serif;
  font-size: 13px;
  line-height: 1.25;
  z-index: 1000;
}

#sg-menu a:link,
#sg-menu a:visited {
  color: black;
}

#sg-menu a:hover,
#sg-menu a:focus-visible {
  background-color: black;
  color: yellow;
}

#sg-menu a:active {
  color: #666666;
}

@media (max-width: 640px) {
  body {
    margin: 8px;
  }

  #sg-menu {
    position: static;
    width: auto;
    bottom: auto;
    overflow-y: visible;
    border-bottom: 1px solid black;
    padding-bottom: 12px;
    margin-bottom: 16px;
  }
}