html, body, main {
  height: 100%;
}

#side-panel {
  position: fixed;
  width: 20em;
  height: 100%;
}

#content {
  margin-left: 20em;
}

.example-def {
  display: none;
}

.persona-icon {
  font-size: 2em;
  background-color: #ccc;
  color: #000;
  padding: 0.3em;
  border-radius: 50%;
}

.persona-container, .persona-container-right {
  text-align: center;
}

.persona-container-right {
  text-align: center;
  display: flex;
  flex-direction: column;
}

.persona-label {
  padding-top: 0.5em;
  font-size: 0.7em;;
  text-align: center;
  font-weight: bold;
}

.chat-row, .com-row {
  display: flex;
  padding: 1em 3em;
  max-width: 60em;
  margin: 0 auto;
}

.chat-msg, .chat-msg-right {
  flex-grow: 1;
}

.chat-cloud {
  background-color: #e7e7e7;
  padding: 0.5em;
  border-radius: 0.5em;
}

.chat-msg {
  margin-left: 20px;
  margin-right: 20%;
}

.chat-msg-right {
  margin-right: 20px;
  margin-left: 20%;
}


.com-arrow {
  display: flex;
  flex-direction: row;
  text-align: center;
  margin: 1.2em 2em;
  width: 100%;
  border-top: 0.8em solid #0d6efd;
}

.com-msg {
  flex-grow: 1;
}

.com-arrow-head:last-of-type::before {
  content: "";
  position: relative;
  height: 0;
  width: 0;
  display: inline-block;
  border-top: 1em solid transparent;
  border-bottom: 1em solid transparent;
  border-left: 1em solid #0d6efd;
  top: -1.375em;
  right: -0.5em;
}

.com-arrow-head:first-of-type::after {
  content: "";
  position: relative;
  height: 0;
  width: 0;
  display: inline-block;
  border-top: 1em solid transparent;
  border-bottom: 1em solid transparent;
  border-right: 1em solid #0d6efd;
  top: -1.375em;
  left: -0.5em;
}

.ellipsis-text {
  text-overflow: ellipsis; 
  overflow: hidden; 
  max-width: 25em; 
  display: inline-block; 
  white-space: nowrap; 
  text-align: left;
}

h2.example-chapter {
  font-size: 1.2em;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  margin-top: 3em;
}

h2.example-chapter::before,
h2.example-chapter::after {
  content: '';
  flex: 1;
  height: 1px;
  background: #aaa;
  margin: 0 10px;
}

.upper-case {
  text-transform: uppercase;
}