body {
    font-family: Arial, sans-serif;
    line-height: 1.6;
    margin: 0;
    padding: 0;
    background-color: #f4f4f4;
    color: #333;
}

.container {
    max-width: 800px;
    margin: 20px auto;
    padding: 20px;
    background-color: #fff;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

h1,
h2 {
    text-align: center;
    color: #333;
}

#main-title {
    margin-bottom: 10px;
}

#description {
    text-align: center;
    margin-bottom: 20px;
    color: #666;
}

#chatbot {
    border: 1px solid #ddd;
    border-radius: 8px;
    padding: 20px;
    margin-top: 20px;
    background-color: #f9f9f9;
}

#chat-messages {
    height: 300px;
    overflow-y: auto;
    border: 1px solid #eee;
    padding: 10px;
    margin-bottom: 10px;
    background-color: #fff;
    border-radius: 4px;
}

.message {
    margin-bottom: 10px;
    padding: 8px;
    border-radius: 5px;
}

.user-message {
    background-color: #e0f7fa;
    text-align: right;
}

.bot-message {
    background-color: #f1f8e9;
    text-align: left;
}

#chat-form {
    display: flex;
}

#chat-input {
    flex-grow: 1;
    padding: 10px;
    border: 1px solid #ddd;
    border-radius: 4px;
    margin-right: 10px;
}

#chat-form button {
    background-color: #28a745;
    color: white;
    padding: 10px 15px;
    border: none;
    border-radius: 4px;
    cursor: pointer;
}

#chat-form button:hover {
    background-color: #218838;
}

.footer {
    text-align: center;
    margin-top: 20px;
    color: #888;
    font-size: 0.9em;
}

/* BBSwithAI用スタイル */
#posts {
    margin-top: 20px;
    border-top: 1px solid #eee;
    padding-top: 10px;
}

.post {
    background-color: #f9f9f9;
    border: 1px solid #eee;
    border-radius: 5px;
    padding: 10px;
    margin-bottom: 10px;
}

.post p {
    margin: 0 0 5px 0;
    color: #555;
}

.post small {
    color: #888;
    font-size: 0.8em;
}

#postForm {
    display: flex;
    flex-direction: column;
    margin-top: 20px;
}

#postContent {
    width: 100%;
    padding: 10px;
    margin-bottom: 10px;
    border: 1px solid #ddd;
    border-radius: 4px;
    box-sizing: border-box;
}

#postForm button,
#summarizeButton,
#aiPostButton {
    background-color: #007bff;
    color: white;
    padding: 10px 15px;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: 1em;
    margin-top: 10px;
}

#postForm button:hover,
#summarizeButton:hover,
#aiPostButton:hover {
    background-color: #0056b3;
}

#summary {
    margin-top: 20px;
    padding: 10px;
    background-color: #e9ecef;
    border: 1px solid #dee2e6;
    border-radius: 4px;
    color: #333;
}

/* Blog post spacing */
article {
  margin-bottom: 3rem; /* Roughly 3 lines of space */
  padding-bottom: 1rem;
  border-bottom: 1px solid #eee;
}

/* 注意書きスタイル */
.chuigaki {
  color: #c00; /* Dark red */
  text-align: center;
  padding: 10px;
  background-color: #fdd; /* Light red */
  border: 1px solid #c00; /* Dark red */
  border-radius: 5px;
  margin: 20px auto;
  max-width: 800px;
}