:root {
    --primary-color: #28b485;
    --primary-light: #60d394;
    --primary-dark: #1e9e6d;
    --secondary-color: #f4a261;
    --bg-color: #f8f9fa;
    --surface-color: #ffffff;
    --text-color: #343a40;
    --light-text-color: #6c757d;
    --white-color: #fff;
    --danger-color: #e76f51;
    --border-color: #dee2e6;
    --shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 8px 25px rgba(0, 0, 0, 0.1);
    --border-radius: 12px;
    --warning-color: #ff9800;
  }

  * { box-sizing: border-box; }

  body {
    margin: 0;
    font-family: 'Poppins', sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    font-weight: 400;
  }

  header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 12px 24px;
    background: var(--surface-color);
    box-shadow: var(--shadow);
    flex-shrink: 0;
    z-index: 100;
  }
  header .logo-title { display: flex; align-items: center; gap: 15px; }
  .logo-placeholder {
    height: 50px;
    width: 50px;
    background: linear-gradient(45deg, #28b485, #60d394);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: bold;
  }
  header h1 {
    color: var(--primary-color);
    font-size: 1.8rem;
    font-weight: 600;
    margin: 0;
  }
  header .header-actions { display: flex; flex-wrap: wrap; gap: 10px; }

  main { flex: 1; display: flex; overflow: hidden; }

  aside {
    width: 240px;
    background: var(--surface-color);
    padding: 20px;
    flex-shrink: 0;
    border-right: 1px solid var(--border-color);
    overflow-y: auto;
  }

  .btn.icon-only {
padding: 10px;
border-radius: 50%;
width: 42px;
height: 42px;
justify-content: center;
}
.btn.icon-only svg {
width: 20px;
height: 20px;
}


  .products {
    flex: 1;
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
    gap: 25px;
    padding: 25px;
    overflow-y: auto;
    align-content: flex-start;
  }

  .product {
    background: var(--surface-color);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    transition: all 0.3s ease;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    cursor: pointer;
    position: relative;
  }
  .product:hover { transform: translateY(-5px); box-shadow: var(--shadow-lg); }
  .product img {
    width: 100%;
    height: 160px;
    object-fit: cover;
    background-color: #e9ecef;
  }
  .product-info { padding: 15px; flex-grow: 1; }
  .product h3 { margin: 0 0 5px 0; font-size: 1.1rem; font-weight: 600; }
  .product p { margin: 0; color: var(--light-text-color); font-size: 0.9rem; }
  .product .buttons {
    padding: 0 15px 15px 15px;
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
  }

  .cart {
    width: 380px;
    background: var(--surface-color);
    padding: 20px;
    border-left: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    flex-shrink: 0;
  }
  .cart h2 {
    text-align: center;
    margin-top: 0;
    font-weight: 600;
    color: var(--primary-dark);
    border-bottom: 2px solid var(--primary-color);
    padding-bottom: 10px;
    margin-bottom: 10px;
  }
  .cart-items-container { flex-grow: 1; overflow-y: auto; padding-right: 10px; }
  .cart-item {
    padding: 10px;
    margin-bottom: 10px;
    border-radius: 8px;
    border: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.95rem;
  }
  .cart-item-details { display: flex; flex-direction: column; }
  .cart-item-name { font-weight: 500;}
  .cart-item-subtotal { font-size: 0.8rem; color: var(--light-text-color); }
  .cart-item-actions button {
    background: none;
    border: 1px solid var(--border-color);
    border-radius: 5px;
    width: 28px;
    height: 28px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
  }
  .cart-footer { padding-top: 15px; border-top: 1px solid var(--border-color); }
  .total, .payment-section label {
    font-size: 1.3rem;
    font-weight: 600;
    color: var(--primary-dark);
  }

  /* Buttons and Inputs */
  .btn {
    padding: 10px 18px;
    border-radius: 8px;
    border: none;
    font-weight: 500;
    font-family: 'Poppins', sans-serif;
    cursor: pointer;
    transition: all 0.2s ease;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-size: 0.9rem;
  }
  .btn-primary { background-color: var(--primary-color); color: var(--white-color); }
  .btn-primary:hover { background-color: var(--primary-dark); }
  .btn-secondary { background-color: var(--secondary-color); color: var(--white-color); }
  .btn-secondary:hover { background-color: #d18241; }
  .btn-danger { background-color: var(--danger-color); color: var(--white-color); }
  .btn-danger:hover { background-color: #c95433; }
  .btn-outline { background-color: transparent; border: 1px solid var(--border-color); color: var(--text-color); }
  .btn-outline:hover { background-color: var(--bg-color); border-color: var(--primary-color); }
  .btn.active {
      background-color: var(--primary-color);
      color: var(--white-color);
      border-color: var(--primary-color);
  }
  .btn-full { width: 100%; justify-content: center; }
  .btn-sm { padding: 8px 12px; font-size: 0.8rem; }
  .btn svg { width: 16px; height: 16px; }

  input[type="number"],
  input[type="password"],
  input[type="text"],
  input[type="date"] {
    font-size: 1rem;
    width: 100%;
    border-radius: 8px;
    padding: 8px 12px;
    border: 1px solid var(--border-color);
    transition: border-color 0.2s ease;
    font-family: 'Poppins', sans-serif;
  }
  input:focus {
    outline: none;
    border-color: var(--primary-color);
  }

  /* Panel Styles */
  .panel {
    padding: 30px 40px;
    background: var(--bg-color);
    height: calc(100vh - 78px);
    overflow-y: auto;
    width: 100%;
  }
  .panel-header {
      display: flex;
      justify-content: space-between;
      align-items: center;
      margin-bottom: 20px;
      padding-bottom: 15px;
      border-bottom: 1px solid var(--border-color);
  }
  .panel-header h2 { margin: 0; font-weight: 600; }
  .card {
      background: var(--surface-color);
      padding: 25px;
      margin-bottom: 25px;
      border-radius: var(--border-radius);
      box-shadow: var(--shadow);
  }
  .card h3 {
      margin-top: 0;
      color: var(--primary-dark);
      border-bottom: 1px solid var(--border-color);
      padding-bottom: 10px;
      margin-bottom: 20px;
      font-weight: 600;
  }
  .grid-layout {
      display: grid;
      grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
      gap: 25px;
  }
  .form-group {
    margin-bottom: 15px;
  }
  .form-group label {
    display: block;
    margin-bottom: 5px;
    font-weight: 500;
  }
  .inventory-item label {
      font-weight: 500;
      margin-bottom: 8px;
      display: block;
  }
  .inventory-item span {
      font-size: 0.9rem;
      color: var(--light-text-color);
      display: block;
      margin-top: 8px;
  }
  .sale-record, .expense-record {
      background: var(--surface-color);
      padding: 15px;
      margin-bottom: 15px;
      border-left: 5px solid var(--primary-light);
      border-radius: 8px;
      box-shadow: var(--shadow);
      display: flex;
      justify-content: space-between;
      align-items: center;
  }
  .expense-record { border-left-color: var(--secondary-color); }

  /* Modal Styles */
  .modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.7);
    z-index: 1000;
    justify-content: center;
    align-items: center;
  }
  .modal-content {
    background: white;
    padding: 30px;
    border-radius: 12px;
    width: 90%;
    max-width: 500px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.3);
  }
  .modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
  }
  .modal-header h3 {
    margin: 0;
    color: var(--primary-dark);
  }
  .close-modal {
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--light-text-color);
  }

  /* Log Styles */
  .log-item {
      background-color: #f8f9fa;
      border: 1px solid var(--border-color);
      border-radius: 8px;
      padding: 15px;
      margin-bottom: 10px;
      display: flex;
      justify-content: space-between;
      align-items: center;
  }
  .log-item strong {
      display: block;
      margin-bottom: 5px;
      color: var(--primary-dark);
  }
  .log-item ul { margin: 0; padding-left: 20px; }
  .log-actions { display: flex; gap: 10px; }

  /* Date filter */
  .date-filter {
    display: flex;
    gap: 10px;
    margin-bottom: 20px;
    align-items: center;
    flex-wrap: wrap;
  }
  .date-filter label { font-weight: 500; }
  .date-filter input, .date-filter select {
    padding: 8px 12px;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    font-family: 'Poppins', sans-serif;
  }
  .date-filter button { padding: 8px 16px; }

  /* Manager mode indicator */
  .manager-indicator {
    background: var(--danger-color);
    color: white;
    padding: 2px 8px;
    border-radius: 4px;
    font-size: 0.8rem;
    margin-left: 10px;
  }

  /* Notification */
  .notification {
    position: fixed;
    top: 20px;
    right: 20px;
    padding: 15px 20px;
    border-radius: 8px;
    color: white;
    background: var(--primary-color);
    box-shadow: var(--shadow-lg);
    z-index: 2000;
    transform: translateX(150%);
    transition: transform 0.3s ease;
  }

  .notification.show { transform: translateX(0); }
  .notification.error { background: var(--danger-color); }
  .notification.warning { background: var(--warning-color); }

  /* Reports Panel Specifics */
  .reports-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 30px;
  }
  .report-card {
      background: var(--surface-color);
      padding: 25px;
      border-radius: var(--border-radius);
      box-shadow: var(--shadow);
  }
  .report-card h3 {
      margin-top: 0;
      color: var(--primary-dark);
      border-bottom: 1px solid var(--border-color);
      padding-bottom: 10px;
      margin-bottom: 20px;
      font-weight: 600;
  }
  .top-product-list {
      list-style: none;
      padding: 0;
  }
  .top-product-list li {
      margin-bottom: 8px;
      font-size: 1rem;
  }
  .top-product-list span {
      font-weight: 600;
      color: var(--primary-dark);
  }
  .category-legend ul {
      list-style: none;
      padding: 0;
  }
  .category-legend li {
      display: flex;
      align-items: center;
      margin-bottom: 8px;
  }
  .legend-color-box {
      width: 16px;
      height: 16px;
      margin-right: 10px;
      border-radius: 4px;
  }
  
  /* Profit Summary */
  .profit-summary {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
    margin-top: 20px;
  }
  .profit-item {
    background: var(--surface-color);
    padding: 20px;
    border-radius: var(--border-radius);
    text-align: center;
    box-shadow: var(--shadow);
  }
  .profit-item h3 {
    margin-top: 0;
    color: var(--light-text-color);
    font-size: 1rem;
  }
  .profit-item p {
    font-size: 1.5rem;
    font-weight: 700;
    margin: 10px 0 0;
  }
  .positive { color: var(--primary-color); }
  .negative { color: var(--danger-color); }

  /* --- Touchscreen Optimizations & Virtual Keypad --- */
  .touch-optimized .btn {
    padding: 15px 24px;
    font-size: 1.1rem;
  }
  .touch-optimized .product {
    min-width: 280px; /* Larger product cards */
  }
  .touch-optimized input,
  .touch-optimized .cart-item,
  .touch-optimized aside .btn {
    padding-top: 15px;
    padding-bottom: 15px;
    font-size: 1.1rem;
  }

  /* Virtual Keypad Styles */
  .keypad-content {
    background: var(--surface-color);
    padding: 20px;
    border-radius: var(--border-radius);
    width: 90%;
    max-width: 360px;
    box-shadow: var(--shadow-lg);
    display: flex;
    flex-direction: column;
    gap: 15px;
  }
  .keypad-display {
    background: var(--bg-color);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 15px;
    text-align: right;
    font-size: 1.8rem;
    font-weight: 600;
    min-height: 60px;
    overflow-x: auto;
  }
  .keypad-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 10px;
  }
  .keypad-btn {
    padding: 20px;
    font-size: 1.5rem;
    font-weight: 500;
    border-radius: 8px;
    border: 1px solid var(--border-color);
    background: var(--surface-color);
    cursor: pointer;
    transition: background-color 0.2s;
  }
  .keypad-btn:active {
    background-color: var(--bg-color);
  }
  .keypad-btn-util {
    background-color: #e9ecef;
  }
  .keypad-btn-ok {
    grid-column: span 3;
    background-color: var(--primary-color);
    color: var(--white-color);
    border-color: var(--primary-color);
  }
  .keypad-btn-ok:active {
    background-color: var(--primary-dark);
  }

  @media (max-width: 992px) {
      .reports-grid { grid-template-columns: 1fr; }
  }
  @media (max-width: 768px) {
      main { flex-direction: column; }
      aside { width: 100%; border-right: none; border-bottom: 1px solid var(--border-color); overflow-y: visible; }
      .cart { width: 100%; border-left: none; }
      header .header-actions { justify-content: flex-end; }
      header h1 { font-size: 1.4rem; }

      .online-btn {
  border: none;
  background: none;
  cursor: pointer;
  padding: 6px;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}
.online-btn:hover {
  transform: scale(1.1);
  box-shadow: 0 0 8px rgba(0,0,0,0.2);
}
.online-btn.selected {
  border: 2px solid #28b485;
  border-radius: 8px;
}

  }

  /* Add this to the existing styles */
#categoryPieChart {
  width: 100% !important;
  height: 100% !important;
  display: block;
}

.legend-item {
  padding: 8px;
  border-radius: 8px;
  background-color: #f8f9fa;
  margin-bottom: 10px;
}

@media (max-width: 768px) {
  .report-card {
      min-width: 100%;
  }
  #categoryPieChart {
      max-height: 250px;
  }
}

.chart-container {
    position: relative;
    height: 300px;
    width: 100%;
  }
  
  .doughnut-center-text {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    text-align: center;
    font-weight: bold;
  }
  
  .doughnut-total {
    font-size: 1.5rem;
    color: var(--primary-dark);
  }
  
  .doughnut-label {
    font-size: 0.9rem;
    color: var(--light-text-color);
  }
  
  /* Improved top products list */
  .top-product-item {
    display: flex;
    justify-content: space-between;
    padding: 8px 0;
    border-bottom: 1px solid var(--border-color);
  }
  
  .product-rank {
    width: 24px;
    height: 24px;
    background-color: var(--primary-light);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
    margin-right: 10px;
  }
  
  .top-product-details {
    flex-grow: 1;
  }
  
  .product-sales-count {
    font-weight: 600;
    color: var(--primary-dark);
  }