.calculator {
      background: rgba(255, 255, 255, 0.05);
      padding: 20px;
      border-radius: 16px;
      width: 700px;
      box-shadow: 0 4px 20px rgba(0,0,0,0.3);
    }
    .header-controls {
      display: flex;
      justify-content: space-between;
      margin-bottom: 20px;
    }
    .cal-row {
      display: flex;
      justify-content: space-between;
      align-items: center;
      background: rgba(255,255,255,0.1);
      padding: 10px;
      border-radius: 12px;
      margin-bottom: 10px;
    }
    .cal-row .label {
      display: flex;
      align-items: center;
      gap: 10px;
    }
    /* Toggle button */
    .switch {
      position: relative;
      display: inline-block;
      width: 50px;
      height: 24px;
    }
    .switch input {
      opacity: 0;
      width: 0;
      height: 0;
    }
    .slider {
      position: absolute;
      cursor: pointer;
      top: 0;
      left: 0;
      right: 0;
      bottom: 0;
      background-color: #555;
      transition: .3s;
      border-radius: 34px;
    }
    .slider:before {
      position: absolute;
      content: "";
      height: 16px;
      width: 16px;
      left: 4px;
      bottom: 4px;
      background-color: white;
      transition: .3s;
      border-radius: 50%;
    }
    input:checked + .slider {
      background-color: #06b6d4;
    }
    input:checked + .slider:before {
      transform: translateX(26px);
    }
    .totals {
      border-top: 1px solid rgba(255,255,255,0.2);
      margin-top: 20px;
      padding-top: 15px;
      display: flex;
      justify-content: space-between;
      font-weight: bold;
      font-size: 18px;
    }