body {
  font-family: "Helvetica Neue", Helvetica, sans-serif;
  font-size: 13px;
  width: 100%;
  height: 100%;;
  margin: 0;
}

html {
  width: 100%;
  height: 100%;;
}
#buffer {
  line-height: 20px;
}

.msg {
  overflow: auto;
  padding: 20px;
}

.buttons {
  position: absolute;
  bottom: 0;
  display: flex;
  align-items: center;
  justify-content: flex-start;
  height: 50px;
}
button {
  margin-left: 20px;
}