body, html {
  margin: 0;
  padding: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", "Apple Color Emoji", "Segoe UI Emoji";
  color: #111;
}
.container {
  max-width: 720px;
  margin: 40px auto;
  padding: 0 16px;
}
input[type="url"], input[type="text"] {
  width: 100%;
  padding: 12px 14px;
  border: 1px solid #ddd;
  border-radius: 8px;
  margin-right: 10px;
  box-sizing: border-box;
}
button {
  padding: 12px 16px;
  border-radius: 8px;
  border: 1px solid #111;
  background: #111;
  color: #fff;
  cursor: pointer;
}
.result {
  margin-top: 24px;
  background: #fafafa;
  border: 1px solid #eee;
  padding: 16px;
  border-radius: 8px;
}
.hidden { display: none !important; }

.chat-body { background: #f7f7f7; }
.chat-container {
  width: 380px;
  height: 540px;
  margin: 10px auto;
  background: #fff;
  border: 1px solid #eee;
  border-radius: 10px;
  display: flex;
  flex-direction: column;
}
.chat-messages {
  flex: 1;
  padding: 12px;
  overflow-y: auto;
}
.chat-form {
  display: flex;
  gap: 8px;
  padding: 10px;
  border-top: 1px solid #eee;
}
.msg {
  padding: 8px 10px;
  margin: 6px 0;
  border-radius: 8px;
  max-width: 90%;
  white-space: pre-wrap;
}
.msg.user { background: #e6f0ff; align-self: flex-end; }
.msg.assistant { background: #f2f2f2; align-self: flex-start; }
.msg.system { background: #fffbe6; align-self: center; }

.progress {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-top: 16px;
  padding: 12px 14px;
  border: 1px solid #eee;
  border-radius: 8px;
  background: #fafafa;
}
.spinner {
  width: 16px;
  height: 16px;
  border: 2px solid #ddd;
  border-top-color: #111;
  border-radius: 50%;
  animation: spin 0.9s linear infinite;
}
.progress-text {
  font-size: 14px;
  color: #333;
}
@keyframes spin {
  to { transform: rotate(360deg); }
}