* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: #f5f6fa;
    color: #333;
}

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 20px;
}

/* Header Styles */
.header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 20px 30px;
    border-radius: 10px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    margin-bottom: 20px;
}

.header-left h1 {
    font-size: 28px;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 10px;
}

.header-left h1 i {
    font-size: 24px;
}

.subtitle {
    font-size: 14px;
    opacity: 0.9;
    margin-top: 5px;
}

.header-right {
    display: flex;
    align-items: center;
    gap: 20px;
}

.date-time {
    display: flex;
    flex-direction: column;
    align-items: flex-end;
}

.date-time span {
    font-size: 14px;
    opacity: 0.9;
}

.user-info {
    display: flex;
    align-items: center;
    gap: 10px;
    background: rgba(255, 255, 255, 0.1);
    padding: 10px 15px;
    border-radius: 20px;
}

/* Navigation Styles */
.nav {
    background: white;
    padding: 10px;
    border-radius: 10px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    margin-bottom: 20px;
}

.nav-links {
    display: flex;
    gap: 5px;
    flex-wrap: wrap;
}

.nav-link {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 12px 16px;
    color: #666;
    text-decoration: none;
    border-radius: 8px;
    transition: all 0.3s ease;
    font-weight: 500;
}

.nav-link:hover {
    background: #f0f0f0;
    color: #333;
}

.nav-link.active {
    background: #667eea;
    color: white;
}

/* Main Content Styles */
.main-content {
    background: white;
    border-radius: 10px;
    padding: 20px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.content-section {
    display: none;
}

.content-section.active {
    display: block;
}

/* Dashboard Styles */
.dashboard-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
    margin-bottom: 30px;
}

.dashboard-card {
    display: flex;
    align-items: center;
    gap: 15px;
    padding: 20px;
    background: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    color: white;
    border-radius: 10px;
    transition: transform 0.3s ease;
}

.dashboard-card:hover {
    transform: translateY(-5px);
}

.card-icon {
    font-size: 36px;
    opacity: 0.9;
}

.card-content h3 {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 5px;
}

.metric-value {
    font-size: 28px;
    font-weight: 700;
    margin-bottom: 3px;
}

.metric-sub {
    font-size: 12px;
    opacity: 0.9;
}

.dashboard-charts {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 20px;
}

.chart-card {
    padding: 20px;
}

.chart-card h3 {
    margin-bottom: 15px;
    font-size: 18px;
    color: #333;
}

.top-selling-list {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.top-selling-item {
    display: flex;
    justify-content: space-between;
    padding: 10px;
    background: #f8f9fa;
    border-radius: 8px;
}

/* POS Styles */
.pos-container {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 20px;
}

.pos-search {
    display: flex;
    gap: 10px;
    margin-bottom: 20px;
}

.pos-search input {
    flex: 1;
    padding: 12px;
    border: 2px solid #e0e0e0;
    border-radius: 8px;
    font-size: 16px;
    transition: border-color 0.3s ease;
}

.pos-search input:focus {
    outline: none;
    border-color: #667eea;
}

.pos-search button {
    padding: 12px 20px;
    background: #667eea;
    color: white;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    font-size: 16px;
    transition: background 0.3s ease;
}

.pos-search button:hover {
    background: #5a6fd8;
}

.medicine-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: 15px;
}

.medicine-card {
    background: white;
    border: 1px solid #e0e0e0;
    border-radius: 10px;
    padding: 15px;
    transition: all 0.3s ease;
    cursor: pointer;
}

.medicine-card:hover {
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
    transform: translateY(-2px);
}

.medicine-card h4 {
    font-size: 16px;
    margin-bottom: 5px;
    color: #333;
}

.medicine-brand {
    font-size: 12px;
    color: #666;
    margin-bottom: 10px;
}

.medicine-price {
    font-size: 18px;
    font-weight: 700;
    color: #667eea;
    margin-bottom: 10px;
}

.medicine-stock {
    font-size: 12px;
    padding: 4px 8px;
    border-radius: 15px;
    display: inline-block;
}

.stock-in {
    background: #d4edda;
    color: #155724;
}

.stock-low {
    background: #fff3cd;
    color: #856404;
}

.stock-out {
    background: #f8d7da;
    color: #721c24;
}

/* Cart Styles */
.cart-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
    padding-bottom: 15px;
    border-bottom: 2px solid #f0f0f0;
}

.cart-header h3 {
    font-size: 20px;
    color: #333;
}

.cart-actions {
    display: flex;
    gap: 10px;
}

.btn-primary,
.btn-secondary,
.btn-success {
    padding: 10px 15px;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    font-size: 14px;
    font-weight: 600;
    transition: all 0.3s ease;
}

.btn-primary {
    background: #667eea;
    color: white;
}

.btn-primary:hover {
    background: #5a6fd8;
}

.btn-secondary {
    background: #6c757d;
    color: white;
}

.btn-secondary:hover {
    background: #5a6268;
}

.btn-success {
    background: #28a745;
    color: white;
}

.btn-success:hover {
    background: #218838;
}

.cart-items {
    background: #f8f9fa;
    border-radius: 8px;
    padding: 15px;
    margin-bottom: 20px;
    max-height: 300px;
    overflow-y: auto;
}

.cart-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 10px;
    background: white;
    margin-bottom: 10px;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
}

.cart-item-info {
    display: flex;
    flex-direction: column;
}

.cart-item-name {
    font-weight: 600;
    margin-bottom: 3px;
}

.cart-item-details {
    font-size: 12px;
    color: #666;
}

.cart-item-controls {
    display: flex;
    align-items: center;
    gap: 10px;
}

.quantity-controls {
    display: flex;
    align-items: center;
    border: 1px solid #ddd;
    border-radius: 6px;
    overflow: hidden;
}

.quantity-btn {
    background: #f0f0f0;
    border: none;
    padding: 5px 10px;
    cursor: pointer;
    font-size: 14px;
}

.quantity-input {
    width: 50px;
    text-align: center;
    border: none;
    outline: none;
    font-size: 14px;
}

.cart-item-price {
    font-weight: 700;
    color: #667eea;
}

.cart-item-remove {
    background: #dc3545;
    color: white;
    border: none;
    padding: 5px 10px;
    border-radius: 6px;
    cursor: pointer;
    font-size: 12px;
}

.cart-summary {
    background: white;
    border-radius: 8px;
    padding: 15px;
    margin-bottom: 20px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
}

.summary-row {
    display: flex;
    justify-content: space-between;
    padding: 8px 0;
    border-bottom: 1px solid #f0f0f0;
    font-size: 14px;
}

.summary-row.total {
    font-weight: 700;
    font-size: 16px;
    color: #333;
    border-bottom: none;
}

.payment-section {
    background: white;
    border-radius: 8px;
    padding: 15px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
}

.payment-method,
.payment-input {
    margin-bottom: 15px;
}

.payment-method label,
.payment-input label {
    display: block;
    font-size: 14px;
    margin-bottom: 5px;
    color: #333;
}

.payment-method select,
.payment-input input {
    width: 100%;
    padding: 10px;
    border: 1px solid #ddd;
    border-radius: 6px;
    font-size: 14px;
    outline: none;
}

.change-display {
    display: flex;
    justify-content: space-between;
    margin-top: 10px;
    font-size: 14px;
    font-weight: 600;
}

/* Inventory Styles */
.section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
}

.section-header h2 {
    font-size: 24px;
    color: #333;
}

.inventory-actions {
    display: flex;
    gap: 10px;
}

.inventory-filters {
    display: flex;
    gap: 10px;
    margin-bottom: 20px;
}

.inventory-filters input,
.inventory-filters select {
    padding: 10px;
    border: 1px solid #ddd;
    border-radius: 6px;
    font-size: 14px;
    outline: none;
}

.inventory-table table {
    width: 100%;
    border-collapse: collapse;
    background: white;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
}

.inventory-table th,
.inventory-table td {
    padding: 12px;
    text-align: left;
    border-bottom: 1px solid #f0f0f0;
    font-size: 14px;
}

.inventory-table th {
    background: #f8f9fa;
    font-weight: 600;
    color: #333;
}

.inventory-table tr:hover {
    background: #f8f9fa;
}

.action-buttons {
    display: flex;
    gap: 5px;
}

.action-btn {
    padding: 6px 10px;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: 12px;
    transition: all 0.3s ease;
}

.edit-btn {
    background: #007bff;
    color: white;
}

.edit-btn:hover {
    background: #0056b3;
}

.delete-btn {
    background: #dc3545;
    color: white;
}

.delete-btn:hover {
    background: #c82333;
}

/* Modal Styles */
.modal {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(2px);
}

.modal-content {
    background-color: white;
    margin: 5% auto;
    padding: 30px;
    border-radius: 10px;
    width: 90%;
    max-width: 500px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.3);
    animation: modalSlideIn 0.3s ease;
}

@keyframes modalSlideIn {
    from {
        opacity: 0;
        transform: translateY(-50px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.modal-content h2 {
    margin-bottom: 20px;
    color: #333;
    font-size: 24px;
}

.close {
    color: #aaa;
    float: right;
    font-size: 28px;
    font-weight: bold;
    cursor: pointer;
    line-height: 1;
}

.close:hover,
.close:focus {
    color: #000;
    text-decoration: none;
    cursor: pointer;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 15px;
    margin-bottom: 15px;
}

.form-group {
    display: flex;
    flex-direction: column;
}

.form-group label {
    margin-bottom: 5px;
    font-size: 14px;
    color: #333;
    font-weight: 600;
}

.form-group input,
.form-group select,
.form-group textarea {
    padding: 10px;
    border: 1px solid #ddd;
    border-radius: 6px;
    font-size: 14px;
    outline: none;
    transition: border-color 0.3s ease;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    border-color: #667eea;
}

.form-actions {
    display: flex;
    justify-content: flex-end;
    gap: 10px;
    margin-top: 20px;
}

/* Receipt Styles */
.receipt-content {
    max-width: 600px;
}

#receipt-content {
    background: white;
    padding: 30px;
    border-radius: 10px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
}

.receipt-header {
    text-align: center;
    margin-bottom: 20px;
    padding-bottom: 15px;
    border-bottom: 2px solid #f0f0f0;
}

.receipt-header h3 {
    color: #333;
    margin-bottom: 5px;
}

.receipt-info {
    display: flex;
    justify-content: space-between;
    margin-bottom: 15px;
    font-size: 14px;
}

.receipt-items {
    width: 100%;
    border-collapse: collapse;
    margin-bottom: 15px;
}

.receipt-items th,
.receipt-items td {
    padding: 8px;
    border-bottom: 1px solid #f0f0f0;
    font-size: 14px;
}

.receipt-items th {
    background: #f8f9fa;
    font-weight: 600;
}

.receipt-total {
    margin-top: 15px;
    padding-top: 15px;
    border-top: 2px solid #f0f0f0;
    font-size: 16px;
    font-weight: 700;
}

.receipt-actions {
    display: flex;
    justify-content: center;
    gap: 15px;
    margin-top: 20px;
}

/* Responsive Design */
@media (max-width: 768px) {
    .header {
        flex-direction: column;
        gap: 15px;
        text-align: center;
    }

    .pos-container {
        grid-template-columns: 1fr;
    }

    .form-row {
        grid-template-columns: 1fr;
    }

    .nav-links {
        overflow-x: auto;
        white-space: nowrap;
    }

    .modal-content {
        width: 95%;
        margin: 10% auto;
    }
}

/* Utility Classes */
.hidden {
    display: none !important;
}

.text-center {
    text-align: center;
}

.text-right {
    text-align: right;
}

.mt-10 {
    margin-top: 10px;
}

.mt-20 {
    margin-top: 20px;
}

.mt-30 {
    margin-top: 30px;
}

.mb-10 {
    margin-bottom: 10px;
}

.mb-20 {
    margin-bottom: 20px;
}

.mb-30 {
    margin-bottom: 30px;
}

.mr-10 {
    margin-right: 10px;
}

.ml-10 {
    margin-left: 10px;
}

/* Toast Notifications */
.toast-container {
    position: fixed;
    top: 20px;
    right: 20px;
    z-index: 2000;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.toast {
    background: white;
    padding: 15px 20px;
    border-radius: 8px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
    border-left: 4px solid #28a745;
    animation: toastSlideIn 0.3s ease;
    min-width: 250px;
}

.toast.error {
    border-left-color: #dc3545;
}

.toast.warning {
    border-left-color: #ffc107;
}

@keyframes toastSlideIn {
    from {
        opacity: 0;
        transform: translateX(100px);
    }

    to {
        opacity: 1;
        transform: translateX(0);
    }
}

/* Loading Spinner */
.loading {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 3px solid #f3f3f3;
    border-top: 3px solid #667eea;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% {
        transform: rotate(0deg);
    }

    100% {
        transform: rotate(360deg);
    }
}