* {
  box-sizing: border-box;
}

body {
  font-family: "Hiragino Kaku Gothic ProN", "Yu Gothic", sans-serif;
  background-color: #f4f6f8;
  margin: 0;
  padding: 0;
  color: #222;
}

.container {
  max-width: 720px;
  margin: 40px auto;
  padding: 24px;
  background: #fff;
  border-radius: 8px;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
}

h1 {
  font-size: 1.5rem;
  margin-bottom: 8px;
}

.description {
  color: #555;
  margin-bottom: 20px;
}

textarea {
  width: 100%;
  padding: 12px;
  font-size: 1rem;
  border: 1px solid #ccc;
  border-radius: 6px;
  resize: vertical;
}

button {
  margin-top: 12px;
  padding: 10px 24px;
  font-size: 1rem;
  color: #fff;
  background-color: #2a6ebb;
  border: none;
  border-radius: 6px;
  cursor: pointer;
}

button:disabled {
  background-color: #9ab6d8;
  cursor: not-allowed;
}

button:hover:not(:disabled) {
  background-color: #1f5490;
}

.hidden {
  display: none;
}

#loading {
  margin-top: 16px;
  color: #555;
}

.error-box {
  margin-top: 16px;
  padding: 12px;
  background-color: #fdecea;
  color: #a94442;
  border: 1px solid #f5c6cb;
  border-radius: 6px;
  white-space: pre-wrap;
}

#result {
  margin-top: 24px;
}

.answer-card {
  padding: 14px 16px;
  margin-bottom: 12px;
  background-color: #f9fafb;
  border-left: 4px solid #2a6ebb;
  border-radius: 4px;
}

.answer-card h3 {
  margin: 0 0 6px 0;
  font-size: 1rem;
  color: #2a6ebb;
}

.answer-card p {
  margin: 0;
  line-height: 1.6;
}

#citations-list {
  padding-left: 20px;
  color: #555;
  font-size: 0.9rem;
  word-break: break-all;
}

#citations-list li {
  margin-bottom: 6px;
}