body {
  font-family: system-ui, sans-serif;
  background: #f4f4f6;
  margin: 0;
  padding: 20px;
}

.app {
  max-width: 500px;
  margin: auto;
  background: white;
  padding: 24px;
  border-radius: 18px;
  box-shadow: 0 4px 20px #00000015;
}

h1 {
  margin-bottom: 4px;
}

.subtitle {
  color: #666;
  margin-top: 0;
  margin-bottom: 25px;
}

.row {
  display: flex;
  gap: 12px;
}

.row div {
  flex: 1;
}

label {
  display: block;
  font-weight: 600;
  margin: 15px 0 6px;
}

input, select {
  width: 100%;
  box-sizing: border-box;
  padding: 12px;
  font-size: 17px;
  border: 1px solid #ccc;
  border-radius: 10px;
}

button {
  width: 100%;
  margin-top: 25px;
  padding: 14px;
  border: 0;
  border-radius: 12px;
  font-size: 17px;
  font-weight: 700;
  cursor: pointer;
}

#result {
  margin-top: 25px;
  line-height: 1.6;
}

.answer {
  background: #f1f1f5;
  padding: 16px;
  border-radius: 12px;
}