#text-tool {
  max-width: 720px;
  margin: 2rem auto;
  padding: 2rem;
  background: #fff;
  border-radius: 12px;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
  font-family: "Segoe UI", sans-serif;
}

#text-tool h2 {
  text-align: center;
  color: #333;
  margin-bottom: 1.5rem;
}

input[type="date"] {
  width: 100%;
  padding: 0.8rem;
  border: 1px solid #FF8A08;
  border-radius: 6px;
  font-size: 1rem;
  margin-bottom: 1rem;
}

.button-group {
  display: flex;
  gap: 0.5rem;
  justify-content: center;
  margin-bottom: 1rem;
}

.button-group button {
  background-color: #FF8A08;
  color: #fff;
  border: none;
  padding: 0.6rem 1.2rem;
  font-size: 1rem;
  border-radius: 6px;
  cursor: pointer;
}

.button-group button:hover {
  background-color: #e97706;
}

#ageResult {
  background-color: #f9f9f9;
  padding: 1rem;
  border: 1px solid #ddd;
  border-radius: 8px;
  min-height: 60px;
  font-size: 1.1rem;
}