body {
  font-family: system-ui, sans-serif;
  max-width: 600px;
  margin: 2rem auto;
  padding: 0 1rem;
  color: #222;
}

h1 {
  font-size: 1.4rem;
}

footer {
  margin-top: 2rem;
  padding-top: 1rem;
  border-top: 1px solid #ccc;
  font-size: 0.85rem;
  color: #666;
  text-align: center;
}

#chat-log {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  margin: 1rem 0;
}

.msg {
  padding: 0.5rem 0.75rem;
  border-radius: 0.5rem;
  max-width: 85%;
}

.msg.assistant {
  background: #eef0f3;
  align-self: flex-start;
}

.msg.user {
  background: #d6e8ff;
  align-self: flex-end;
}

#chat-form {
  display: flex;
  gap: 0.5rem;
}

#chat-input {
  flex: 1;
  padding: 0.5rem;
}

#preview {
  margin-top: 1.5rem;
  padding-top: 1rem;
  border-top: 1px solid #ccc;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

#preview label {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  font-weight: 600;
}

#preview textarea,
#preview input,
#preview select {
  font: inherit;
  padding: 0.4rem;
}

button {
  padding: 0.5rem 1rem;
  cursor: pointer;
}