/* Base reset */
body {
  font-family: Arial, sans-serif;
  margin: 0;
  padding: 20px;
  background-color: #f3f7fb;
  color: #333;
}

/* Header styling */
header {
  text-align: center;
  margin-bottom: 20px;
}
.header-logo {
  width: 60px;
  vertical-align: middle;
}
header h1 {
  margin: 10px 0 5px;
}
header p {
  font-size: 0.95rem;
  color: #555;
}

/* Chat display box */
.chat-box {
  max-height: 400px;
  overflow-y: auto;
  background: #fff;
  border-radius: 8px;
  padding: 10px;
  border: 1px solid #ccc;
  margin-bottom: 15px;
}

/* Message styling */
.message {
  margin: 6px 0;
  padding: 8px 12px;
  border-radius: 15px;
  max-width: 70%;
}
.message.user {
  background-color: #d1e7ff;
  align-self: flex-end;
  margin-left: auto;
}
.message.bot {
  background-color: #e4e4e4;
  align-self: flex-start;
  margin-right: auto;
}

/* Button styling */
.choice-btn, #send-btn {
  background-color: #0366d6;
  color: white;
  border: none;
  border-radius: 6px;
  padding: 8px 14px;
  font-size: 14px;
  cursor: pointer;
  transition: background-color 0.3s ease;
}
.choice-btn:hover, #send-btn:hover {
  background-color: #024b9b;
}
.choice-btn:disabled {
  background-color: #ccc;
  cursor: not-allowed;
}

/* Input area */
#input-area {
  display: flex;
  gap: 10px;
}
#user-input {
  flex-grow: 1;
  padding: 8px;
  border-radius: 6px;
  border: 1px solid #ccc;
}

/* Button container layouts */
#question-buttons,
#course-buttons {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 10px;
}