.inventory-page {
  padding: 30px;
    padding-top: 85px;
    background: #f4f4f7;
    min-height: 100vh;
  }
  
  /* HEADER */
  .page-header h2 {
    font-size: 26px;
    color: purple;
  }
  
  .page-header p {
    color: #666;
    margin-bottom: 20px;
  }
  
  /* SUMMARY */
  .inventory-summary {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
    gap: 15px;
    margin-bottom: 30px;
  }
  
  .summary-card {
    background: #fff;
    padding: 20px;
    border-radius: 14px;
    box-shadow: 0 5px 20px rgba(0,0,0,0.08);
  }
  
  .summary-card h3 {
    font-size: 28px;
    color: purple;
  }
  
  .summary-card span {
    color: #666;
  }
  
  .summary-card.danger h3 {
    color: #d00000;
  }
  
  /* INVENTORY LIST */
  .inventory-section {
    background: #fff;
    padding: 20px;
    border-radius: 14px;
    margin-bottom: 30px;
  }
  
  .inventory-item {
    display: flex;
    justify-content: space-between;
    border-bottom: 1px solid #eee;
    padding: 15px 0;
  }
  
  .inventory-item:last-child {
    border-bottom: none;
  }
  
  .stats span {
    display: block;
    font-size: 14px;
  }
  
  .available {
    color: green;
  }
  
  .out {
    color: #c2410c;
  }
  
  /* CALCULATOR */
  .calculator-section {
    background: #fff;
    padding: 20px;
    border-radius: 14px;
  }
  
  .calculator-section label {
    display: block;
    margin-bottom: 15px;
  }
  
  .calculator-section input,
  .calculator-section select {
    width: 100%;
    padding: 10px;
    border-radius: 10px;
    border: 1px solid #ccc;
  }
  
  .calculator-section button {
    width: 100%;
    padding: 12px;
    background: purple;
    color: #fff;
    border: none;
    border-radius: 12px;
    font-size: 16px;
    cursor: pointer;
  }
  
  .calc-result {
    margin-top: 15px;
    font-weight: 600;
  }
  
  /* FOOTER */
  .inventory-footer {
    text-align: center;
    margin-top: 40px;
    color: #777;
  }
  
  /* RESPONSIVE */
  @media (max-width: 600px) {
    .inventory-item {
      flex-direction: column;
      gap: 10px;
      padding:20px 0;
    }
  
  }