/* コストシミュレーター */
#cost-simulator {
  padding: 120px 0;
  text-align: center;
  position: relative;
  overflow: hidden;
  background-color: #ffffff;
  width:100%;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='100' height='100' viewBox='0 0 100 100'%3E%3Cg fill-rule='evenodd'%3E%3Cg fill='%236cc376' fill-opacity='0.15'%3E%3Cpath opacity='.5' d='M96 95h4v1h-4v4h-1v-4h-9v4h-1v-4h-9v4h-1v-4h-9v4h-1v-4h-9v4h-1v-4h-9v4h-1v-4h-9v4h-1v-4h-9v4h-1v-4h-9v4h-1v-4H0v-1h15v-9H0v-1h15v-9H0v-1h15v-9H0v-1h15v-9H0v-1h15v-9H0v-1h15v-9H0v-1h15v-9H0v-1h15v-9H0v-1h15V0h1v15h9V0h1v15h9V0h1v15h9V0h1v15h9V0h1v15h9V0h1v15h9V0h1v15h9V0h1v15h9V0h1v15h4v1h-4v9h4v1h-4v9h4v1h-4v9h4v1h-4v9h4v1h-4v9h4v1h-4v9h4v1h-4v9h4v1h-4v9zm-1 0v-9h-9v9h9zm-10 0v-9h-9v9h9zm-10 0v-9h-9v9h9zm-10 0v-9h-9v9h9zm-10 0v-9h-9v9h9zm-10 0v-9h-9v9h9zm-10 0v-9h-9v9h9zm-10 0v-9h-9v9h9zm-9-10h9v-9h-9v9zm10 0h9v-9h-9v9zm10 0h9v-9h-9v9zm10 0h9v-9h-9v9zm10 0h9v-9h-9v9zm10 0h9v-9h-9v9zm10 0h9v-9h-9v9zm10 0h9v-9h-9v9zm9-10v-9h-9v9h9zm-10 0v-9h-9v9h9zm-10 0v-9h-9v9h9zm-10 0v-9h-9v9h9zm-10 0v-9h-9v9h9zm-10 0v-9h-9v9h9zm-10 0v-9h-9v9h9zm-10 0v-9h-9v9h9zm-9-10h9v-9h-9v9zm10 0h9v-9h-9v9zm10 0h9v-9h-9v9zm10 0h9v-9h-9v9zm10 0h9v-9h-9v9zm10 0h9v-9h-9v9zm10 0h9v-9h-9v9zm10 0h9v-9h-9v9zm9-10v-9h-9v9h9zm-10 0v-9h-9v9h9zm-10 0v-9h-9v9h9zm-10 0v-9h-9v9h9zm-10 0v-9h-9v9h9zm-10 0v-9h-9v9h9zm-10 0v-9h-9v9h9zm-10 0v-9h-9v9h9zm-9-10h9v-9h-9v9zm10 0h9v-9h-9v9zm10 0h9v-9h-9v9zm10 0h9v-9h-9v9zm10 0h9v-9h-9v9zm10 0h9v-9h-9v9zm10 0h9v-9h-9v9zm10 0h9v-9h-9v9zm9-10v-9h-9v9h9zm-10 0v-9h-9v9h9zm-10 0v-9h-9v9h9zm-10 0v-9h-9v9h9zm-10 0v-9h-9v9h9zm-10 0v-9h-9v9h9zm-10 0v-9h-9v9h9zm-10 0v-9h-9v9h9zm-9-10h9v-9h-9v9zm10 0h9v-9h-9v9zm10 0h9v-9h-9v9zm10 0h9v-9h-9v9zm10 0h9v-9h-9v9zm10 0h9v-9h-9v9zm10 0h9v-9h-9v9zm10 0h9v-9h-9v9z'/%3E%3Cpath d='M6 5V0H5v5H0v1h5v94h1V6h94V5H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
}

#cost-simulator::before {
  content: "";
  position: absolute;
  top: 0;
  left: -50%;
  width: 200%;
  height: 100%;
  border-radius: 50% 50% 0 0;
  z-index: 0;
}

#cost-title {
  font-size: 32px;
  margin-bottom: 50px;
}

#cost-calculator {
  max-width: 800px;
  margin: 0 auto;
  position: relative;
  z-index: 1;
  background: rgba(255, 255, 255, 0.9);
  padding: 40px;
  border-radius: 20px;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
}

.cost-input-row {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: 15px;
  margin-bottom: 30px;
  font-size: 20px;
}

.cost-input-group {
  display: flex;
  align-items: center;
  gap: 10px;
}

.cost-select-container {
  display: flex;
  align-items: center;
  gap: 5px;
}

.cost-label {
  font-weight: 500;
  color: #333;
}

.cost-select {
  font-size: 24px;
  font-weight: bold;
  padding: 10px 15px;
  border: 3px solid #ddd;
  border-radius: 10px;
  background: white;
  color: #333;
  min-width: 80px;
  text-align: center;
  cursor: pointer;
  transition: all 0.3s ease;
}

.cost-select:hover {
  border-color: #5bb2c0;
  transform: scale(1.05);
}

.cost-select:focus {
  outline: none;
  border-color: #02e6ff;
  box-shadow: 0 0 10px rgba(2, 230, 255, 0.3);
}

.cost-unit {
  font-weight: 500;
  color: #333;
}

.cost-multiply {
  font-size: 28px;
  font-weight: bold;
  color: #666;
  margin: 0 10px;
}

#cost-result {
  margin: 40px 0 60px 0;
  font-size: 24px;
  font-weight: bold;
}

#cost-calculation {
  color: #333;
}

#monthly-savings {
  font-size: 36px;
  background-image: linear-gradient(145deg, #6b5aff, #ff6b9d);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  font-weight: 900;
}

/* レスポンシブ対応 */
@media (max-width: 768px) {
  #cost-simulator {
    padding: 60px 20px;
  }

  #cost-title {
    font-size: 22px;
    margin-bottom: 60px;
  }

  #cost-calculator {
    padding: 30px 20px;
  }

  .cost-input-row {
    font-size: 16px;
    flex-direction: column;
    align-items: center;
    text-align: center;
    gap: 15px;
  }

  /* 各入力グループを縦並びにする */
  .cost-input-group {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
  }

  .cost-label {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 10px;
  }

  /* 選択肢と単位のコンテナ */
  .cost-select-container {
    display: flex;
    align-items: center;
    gap: 8px;
  }

  .cost-select {
    font-size: 20px;
    margin: 0;
  }

  .cost-unit {
    font-size: 16px;
    white-space: nowrap;
  }

  .cost-multiply {
    font-size: 24px;
    margin: 5px 0;
  }

  #cost-result {
    font-size: 18px;
  }

  #monthly-savings {
    font-size: 28px;
  }
}

@media (max-width: 480px) {
  .cost-input-row {
    font-size: 14px;
  }

  .cost-select {
    font-size: 18px;
  }

  #cost-result {
    font-size: 16px;
  }

  #monthly-savings {
    font-size: 24px;
  }
}