* {
  color: #444;
  font-family: arial, tahoma, verdana;
}
html,
body {
  height: 100%;
  margin: 0;
}
.full-height {
  height: 100%;
}
a.menu-link {
  text-decoration: none;
  display: block;
}
a.menu-link.active,
a.menu-link:hover {
  color: blue;
}
ul,
#menu {
  list-style-type: none;
}
#menu {
  margin: 0;
  padding: 0;
}
#menu > li,
#menu .nested > li {
  margin: 0;
}
#menu > li {
  padding: 2px;
}
#menu > li a {
  margin: 2px auto;
  padding: 3px 5px;
  border: solid thin #ccc;
  border-radius: 5px;
  font-size: 14px;
}
#menu .caret {
  cursor: pointer;
  -webkit-user-select: none; /* Safari 3.1+ */
  -moz-user-select: none; /* Firefox 2+ */
  -ms-user-select: none; /* IE 10+ */
  user-select: none;
  font-size: 14px;
}
#menu .caret::before {
  content: "\25B6";
  color: #444;
  display: inline-block;
  margin-right: 6px;
}
#menu .caret-down::before {
  -ms-transform: rotate(90deg); /* IE 9 */
  -webkit-transform: rotate(90deg); /* Safari */
  transform: rotate(90deg);
  color: crimson;
}
#menu .caret-down,
#menu .caret:hover,
#menu .caret:hover::before {
  color: crimson;
  transition-duration: 300ms;
}
#menu .nested {
  display: none;
  padding-left: 3px;
}
#menu .active {
  display: block;
}
.container {
  display: flex;
}
.menu-container {
  max-width: 320px;
  min-width: 180px;
  display: flex;
  border: solid thin #ccc;
  border-radius: 3px;
  margin: 5px;
  padding: 5px;
  overflow: auto;
}
.page-content {
  margin: 5px;
  padding: 5px;
  width: 100%;
  display: flex;
  border: solid thin #ccc;
  border-radius: 3px;
  max-width: 768px;
}
img {
  max-width: 100%;
}