body {
  font-family: "Apple SD Gothic Neo", sans-serif;
  background: #f0f8ff;
  padding: 30px;
}
.container {
  max-width: 500px;
  margin: auto;
  background: white;
  padding: 30px;
  border-radius: 10px;
  box-shadow: 0 0 10px rgba(0,0,0,0.1);
}
input {
  width: 100%;
  padding: 10px;
  margin: 8px 0 16px;
  border: 1px solid #ccc;
  border-radius: 5px;
}
.result {
  font-size: 1.2em;
  margin-top: 10px;
  font-weight: bold;
  color: #2d6a4f;
}
.note {
  margin-top: 20px;
  font-size: 0.95em;
  color: #444;
  background: #e8f5e9;
  padding: 10px;
  border-left: 5px solid #4caf50;
}