.calc-tabs .nav-link {
    border-radius: 20px;
    font-weight: 600;
    padding: 8px 20px;
  }
  .calc-tabs .nav-link.active {
    background: #0d6efd;
    color: white !important;
  }

  .calculator-card {
    background: linear-gradient(180deg, #ffffff, #f9fbff);
    border-radius: 20px;
    box-shadow: 0 6px 25px rgba(0, 0, 0, 0.08);
    padding: 30px;
  }

  h4, h5, h6 { font-weight: 600; color: #0d6efd; }
  .form-label { font-weight: 500; color: #444; }
  .form-control { border-radius: 10px; border: 1px solid #ced4da; font-weight: 500; }
  .form-range { accent-color: #0d6efd; }

  .btn-primary {
    background: #0056d2;
    border: none;
    font-weight: 600;
    padding: 10px;
    border-radius: 10px;
  }
  .btn-primary:hover { background: #0041a8; }

  .result-summary { font-size: 15px; line-height: 1.6; }
  .result-summary strong { color: #222; font-weight: 600; width: 150px; display: inline-block; }
  .result-summary span { font-weight: 700; color: #0d6efd; }

  .sidebar-card {
    background: linear-gradient(135deg, #0d6efd, #20c997);
    color: white;
    border-radius: 20px;
    padding: 25px;
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.15);
    text-align: center;
  }
  .sidebar-card button {
    background: white;
    color: #0d6efd;
    font-weight: 600;
    border: none;
    border-radius: 50px;
    padding: 10px 20px;
    margin-top: 15px;
  }

  .calculator-card ul li a { font-size: 14px; color: #0d6efd; }
  .calculator-card ul li a:hover { text-decoration: underline; }

  .info-section {
    background: #fff;
    border-radius: 20px;
    padding: 35px;
    margin-top: 40px;
    box-shadow: 0 6px 25px rgba(0,0,0,0.08);
  }