body {
  font-family: sans-serif;
  background-color: #f4f6f8;
  margin: 0;
  padding: 0;
}
.chat-container {
  height: calc(90vh - 70px); /* 入力欄の高さを差し引く */
  overflow-y: auto;
  padding: 1rem;
  background-color: #f8f9fa;
    }
.message {
  max-width: 80%;
  margin: 6px 0;
  padding: 8px 12px;
  border-radius: 10px;
  line-height: 1.4;
  word-break: break-word;
}

.message.user {
  background-color: #d0f0ff;
  text-align: right;
  align-self: flex-end;
}

.message.bot {
  background-color: #f0f0f0;
  text-align: left;
  align-self: flex-start;
}

.input-container {
  display: flex;
  margin-top: 20px;
  border-top: 1px solid #ccc;
  padding-top: 10px;
  background-color: #fff;
}
input[type="text"] {
  flex-grow: 1;
  padding: 10px;
  font-size: 16px;
  border: 1px solid #ccc;
  border-radius: 8px;
  margin-right: 10px;
}
button {
  padding: 10px 16px;
  font-size: 16px;
  background-color: #0d6efd;
  color: white;
  border: none;
  border-radius: 8px;
  cursor: pointer;
}
button:hover {
  background-color: #0b5ed7;
}

.bottom_navi {
    background-color: aliceblue;
    width:100%; 
    height: 70px; 
    position: absolute; 
    bottom: 0; 
    border-top-style: solid; 
    border-top-width: thin;
    padding-top: 10px;
}

#input-area {
      position: fixed;
      bottom: 0;
      left: 0;
      right: 0;
      background-color: white;
      padding: 10px;
      border-top: 1px solid #ccc;
      z-index: 1000;
    }

#userInput {
  flex: 1;
}

#input-area button {
  white-space: nowrap;
}