body {
  font-family: sans-serif;
  background: #f0f0f0;
  margin: 0;
  padding: 0;
}
.chat-container {
  max-width: 600px;
  margin: 50px auto;
  background: white;
  border-radius: 8px;
  padding: 16px;
  box-shadow: 0 4px 10px rgba(0,0,0,0.1);
}
.messages {
  max-height: 400px;
  overflow-y: auto;
  margin-bottom: 16px;
  display: flex;
  flex-direction: column;
}
.bubble {
  display: inline-block;
  padding: 10px 14px;
  margin: 8px 0;
  border-radius: 16px;
  max-width: 80%;
  word-break: break-word;
}
.user {
  background-color: #d1f5d3;
  align-self: flex-end;
  text-align: right;
  margin-left: auto;
}
.bot {
  background-color: #e4e4e4;
  align-self: flex-start;
  text-align: left;
  margin-right: auto;
}
.input-area {
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.input-row {
  display: flex;
  gap: 8px;
  align-items: center;
}
input[type="text"], input[type="file"], select {
  flex: 1;
  padding: 10px;
  border-radius: 8px;
  border: 1px solid #ccc;
}
button {
  padding: 10px 16px;
  border: none;
  border-radius: 8px;
  background-color: #3aa757;
  color: white;
  cursor: pointer;
  min-width: 80px;
}
button:hover {
  background-color: #318d49;
}
img.chat-img {
  max-width: 200px;
  border-radius: 12px;
}
.loading {
  font-size: 0.9em;
  color: gray;
  font-style: italic;
  margin-top: 4px;
}
label {
  min-width: 120px;
}
.notice {
  max-width: 1000px;
  margin: 50px auto;
  border-radius: 8px;
  padding: 16px;
  font-size: 0.85em;
  color: #555;
  margin-top: 40px;
  line-height: 1.6;
}