body {
  font-family: "Helvetica Neue", Helvetica, Arial, sans-serif;
  margin: 0;
  padding: 0;
  background: #fdfdfd;
  color: #333;
}
.container {
  max-width: 600px;
  margin: 2rem auto;
  padding: 2rem;
  background: #fff;
  border-radius: 12px;
  box-shadow: 0 0 16px rgba(0, 0, 0, 0.06);
}
h1 {
  font-size: 1.6rem;
  margin-bottom: 1.5rem;
  text-align: center;
  color: #444;
}
label {
  font-size: 0.95rem;
  font-weight: bold;
  display: block;
  margin-top: 1.5rem;
  margin-bottom: 0.4rem;
}
.input-row {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}
.input-row input {
  width: 4rem;
  padding: 0.4rem;
  font-size: 1rem;
  text-align: center;
}
.input-row button {
  font-size: 1.2rem;
  width: 2.5rem;
  height: 2.5rem;
  text-align: center;
  background: #eee;
  border: none;
  border-radius: 6px;
  cursor: pointer;
}
.input-row button:hover {
  background: #ccc;
}
.radio-group {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-bottom: 0.5rem;
}
.radio-group label {
  font-weight: normal;
  background: #f4f4f4;
  padding: 0.4rem 0.8rem;
  border-radius: 6px;
  cursor: pointer;
}
.radio-group input {
  margin-right: 0.4rem;
}
.output-section {
  margin-top: 2rem;
}
.output-section h2 {
  font-size: 1.2rem;
  margin-bottom: 0.6rem;
  color: #222;
}
#summary div {
  margin-bottom: 0.3rem;
  font-size: 0.95rem;
}
#summary div:last-child {
  margin-top: 0.5rem;
  color: #555;
  font-style: italic;
}
#steps {
  list-style: none;
  padding: 0;
  margin: 0;
}
.step-header {
  display: flex;
  justify-content: space-between;
  font-weight: bold;
  background: #f0f0f0;
  padding: 0.5rem 0;
}
.step-row {
  display: flex;
  justify-content: space-between;
  padding: 0.5rem 0;
  border-bottom: 1px solid #ddd;
}
.step-row span {
  width: 33%;
  text-align: center;
}


/* 抽出ステップヘッダの列を中央揃え */
.step-header span {
  width: 33%;
  text-align: center;
}