body {
    font-family: 'Poppins', sans-serif;
    background: #EDF2F4;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    margin: 0;
  }
  
  .login-container {
    background: #fff;
    padding: 30px;
    border-radius: 12px;
    box-shadow: 0 8px 16px rgba(0,0,0,0.1);
    width: 300px;
    text-align: center;
  }
  
  .login-container h2 {
    margin-bottom: 20px;
    color: #2B2D42;
  }
  
  input {
    width: 100%;
    padding: 12px;
    margin-bottom: 15px;
    border: 1px solid #ccc;
    border-radius: 6px;
  }
  
  button {
    width: 100%;
    padding: 12px;
    background-color: #EF233C;
    color: #fff;
    border: none;
    border-radius: 6px;
    font-weight: 600;
    cursor: pointer;
  }
  
  button:hover {
    background-color: #D90429;
  }
  
  .error {
    color: red;
    font-size: 14px;
  }
  .dashboard-container {
    padding: 30px;
    max-width: 800px;
    margin: auto;
    background-color: #fff;
    margin-top: 50px;
    border-radius: 10px;
    box-shadow: 0 4px 8px rgba(0,0,0,0.05);
  }
  
  .header {
    text-align: center;
    margin-bottom: 30px;
  }
  
  .dashboard-cards {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 20px;
  }
  
  .card {
    padding: 20px;
    background-color: #2B2D42;
    color: #fff;
    border-radius: 10px;
    text-align: center;
    text-decoration: none;
    font-size: 18px;
    width: 150px;
    box-shadow: 0 6px 10px rgba(0,0,0,0.1);
    transition: 0.3s;
  }
  
  .card:hover {
    background-color: #EF233C;
  }
  .billing-container {
    max-width: 800px;
    margin: 40px auto;
    background: #fff;
    padding: 30px;
    border-radius: 12px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.05);
  }
  
  .billing-form {
    display: flex;
    gap: 10px;
    margin-bottom: 20px;
  }
  
  .billing-form input {
    flex: 1;
  }
  
  .billing-table {
    width: 100%;
    border-collapse: collapse;
    margin-bottom: 20px;
  }
  
  .billing-table th, .billing-table td {
    padding: 10px;
    border: 1px solid #ccc;
    text-align: center;
  }
  
  .billing-summary {
    text-align: right;
    font-size: 18px;
  }
  .inventory-container {
    max-width: 900px;
    margin: 40px auto;
    background: #fff;
    padding: 30px;
    border-radius: 12px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.05);
  }
  
  .inventory-container h2 {
    text-align: center;
    margin-bottom: 20px;
  }
  
  #productForm {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-bottom: 30px;
  }
  
  #productForm input {
    flex: 1 1 150px;
  }
  
  .inventory-table {
    width: 100%;
    border-collapse: collapse;
  }
  
  .inventory-table th,
  .inventory-table td {
    padding: 10px;
    border: 1px solid #ccc;
    text-align: center;
  }
  .report-container {
    max-width: 900px;
    margin: 40px auto;
    background: #fff;
    padding: 30px;
    border-radius: 12px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.05);
  }
  
  .report-filter {
    display: flex;
    gap: 10px;
    margin-bottom: 20px;
  }
  
  .report-table {
    width: 100%;
    border-collapse: collapse;
    margin-bottom: 20px;
  }
  
  .report-table th, .report-table td {
    padding: 10px;
    border: 1px solid #ccc;
    text-align: center;
  }
  
  .report-summary {
    text-align: right;
    font-size: 18px;
  }
  .settings-container {
    max-width: 600px;
    margin: 40px auto;
    background: #fff;
    padding: 30px;
    border-radius: 12px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.05);
  }
  
  #settingsForm {
    display: flex;
    flex-direction: column;
    gap: 12px;
  }
  .topnav {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background-color: #2B2D42;
    z-index: 1000;
    padding: 10px 20px;
    display: flex;
    align-items: center;
    gap: 15px;
  }
  body {
    padding-top: 60px; /* push content down to avoid hiding under nav */
  }