#tool-area {
  padding: 24px;
  font-size: 1rem;
}
#message {
  display: none;
  position: absolute;
  top: 45%;
  left: calc(50% - 128px);
  width: 256px;
  background-color: gray;
  color: white;
  padding: 8px 16px;
  text-align: center;
  font-weight: bold;
  font-size: 1.2rem;
  border-radius: 12px;
}
#input-area {
  width: 100%;
}
.midashi::before {
  content: '◆';
}
label {
  margin-right: 24px;
}
#length {
  height: 1.3rem;
  font-size: 1rem;
  width: 2.5rem;
  margin-left: 8px;
}
textarea {
  resize: none;
  width:300px;
  height: 1.3rem;
  font-size: 0.8rem;
  border-radius: 4px;
  padding: 3px 10px 0 10px;
}
input[type=checkbox] {
  transform: scale(1.5);
  margin-right: 8px;
}
.box {
  margin-left: 32px;
}
#btn {
  display: block;
  height: 40px;
  width: 160px;
  margin: 16px auto;
  font-size: 1.2rem;
}
#output-area textarea {
  height: 1.8rem;
  font-size: 1rem;
  line-height: 1.4rem;
  width:488px;
}
#output-area li {
  margin: 12px 0;
}
#output-area li button {
  margin-left: 12px;
  padding: 0 6px;
  height: 34px;
  font-size: 0.7rem;
}