:root {
    --primary-color: #4e73df;
    --primary-color-dark: #2e59d9;
    --secondary-color: #5a5c69;
    --success-color: #1cc88a;
    --danger-color: #e74a3b;
    --warning-color: #f6c23e;
    --info-color: #36b9cc;
    --light-color: #f8f9fc;
    --dark-color: #5a5c69;
    --sidebar-width: 250px;
    --border-radius: 0.35rem;
    --transition-speed: 0.3s;
    --box-shadow: 0 0.15rem 1.75rem 0 rgba(58, 59, 69, 0.15);
    --box-shadow-sm: 0 0.125rem 0.25rem 0 rgba(58, 59, 69, 0.2);
}

body {
    font-family: 'Prompt', sans-serif;
    background-color: #f8f9fc;
    overflow-x: hidden;
    color: #5a5c69;
}

/* Sidebar Styles */
.sidebar {
    position: fixed;
    left: 0;
    top: 0;
    bottom: 0;
    width: var(--sidebar-width);
    background: linear-gradient(180deg, #4e73df 10%, #224abe 100%);
    color: white;
    padding: 1rem;
    transition: all var(--transition-speed) ease;
    z-index: 1000;
    box-shadow: 0 0.15rem 1.75rem 0 rgba(58, 59, 69, 0.15);
}

.sidebar .logo-container {
    text-align: center;
    padding: 1rem 0;
    border-bottom: 1px solid rgba(255,255,255,0.15);
    margin-bottom: 1rem;
}

.sidebar .logo {
    max-height: 60px !important;
    width: auto;
    margin-bottom: 0.5rem;
    filter: drop-shadow(0px 2px 4px rgba(0,0,0,0.2));
}

.sidebar .nav-link {
    color: rgba(255,255,255,0.8);
    padding: 0.8rem 1rem;
    border-radius: var(--border-radius);
    margin-bottom: 0.3rem;
    transition: all var(--transition-speed) ease;
    font-weight: 500;
}

.sidebar .nav-link:hover, 
.sidebar .nav-link.active {
    color: white;
    background: rgba(255,255,255,0.15);
}

.sidebar .nav-link i {
    margin-right: 0.8rem;
    width: 20px;
    text-align: center;
    opacity: 0.8;
}

.sidebar .nav-link:hover i,
.sidebar .nav-link.active i {
    opacity: 1;
}

/* Sidebar Toggle Button */
.sidebar-toggle {
    position: relative;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background-color: var(--primary-color);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    border: none;
    box-shadow: 0 2px 5px rgba(0,0,0,0.2);
    transition: all var(--transition-speed) ease;
}

.sidebar-toggle:hover {
    background-color: var(--primary-color-dark);
    transform: scale(1.05);
}

.sidebar-close {
    position: absolute;
    top: 10px;
    right: 10px;
    width: 30px;
    height: 30px;
    border-radius: 50%;
    background-color: rgba(255, 255, 255, 0.2);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    border: none;
    cursor: pointer;
    font-size: 18px;
    transition: all var(--transition-speed) ease;
    display: none;
}

.sidebar-close:hover {
    background-color: rgba(255, 255, 255, 0.3);
}

/* Main Content Styles */
.main-content {
    margin-left: var(--sidebar-width);
    min-height: 100vh;
    background: #f8f9fc;
    padding: 1.5rem;
    padding-top: 70px;
    transition: margin var(--transition-speed) ease;
}

/* Top Navigation */
.top-navbar {
    position: fixed;
    top: 0;
    right: 0;
    left: var(--sidebar-width);
    z-index: 990;
    transition: left var(--transition-speed) ease;
}

/* Card Styles */
.card {
    border: none;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    transition: all var(--transition-speed) ease;
    overflow: hidden;
    margin-bottom: 1.5rem;
}

.card-header {
    background-color: #f8f9fc;
    border-bottom: 1px solid #e3e6f0;
    padding: 1rem 1.25rem;
}

.card-header h6 {
    font-weight: 700;
    text-transform: uppercase;
    margin: 0;
    color: var(--primary-color);
}

.card-body {
    padding: 1.25rem;
}

/* Button Styles */
.btn {
    border-radius: var(--border-radius);
    padding: 0.375rem 0.75rem;
    font-weight: 500;
    transition: all var(--transition-speed) ease;
}

.btn-primary {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
}

.btn-primary:hover, 
.btn-primary:focus {
    background-color: var(--primary-color-dark);
    border-color: var(--primary-color-dark);
    box-shadow: 0 0 0 0.2rem rgba(78, 115, 223, 0.25);
}

.btn-success {
    background-color: var(--success-color);
    border-color: var(--success-color);
}

.btn-danger {
    background-color: var(--danger-color);
    border-color: var(--danger-color);
}

.btn-warning {
    background-color: var(--warning-color);
    border-color: var(--warning-color);
}

.btn-info {
    background-color: var(--info-color);
    border-color: var(--info-color);
}

/* Table Styles */
.table {
    color: #5a5c69;
    margin-bottom: 0;
}

.table thead th {
    background-color: #f8f9fc;
    border-bottom: 2px solid #e3e6f0;
    font-weight: 700;
    text-transform: uppercase;
    font-size: 0.8rem;
    color: #4e73df;
    padding: 1rem;
}

.table td {
    vertical-align: middle;
    padding: 0.75rem 1rem;
    border-color: #e3e6f0;
}

/* Receipt Specific Styles */
.receipt-container {
    max-width: 800px;
    margin: 2rem auto;
    background: white;
    padding: 2rem;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    transition: all var(--transition-speed) ease;
}

.receipt-header {
    text-align: center;
    margin-bottom: 1.5rem;
    padding-bottom: 1rem;
    border-bottom: 1px dashed #e3e6f0;
}

.receipt-header h4 {
    color: #4e73df;
    font-weight: 700;
    margin-bottom: 0.5rem;
}

.receipt-items {
    margin-bottom: 1.5rem;
}

.receipt-items .table {
    border-radius: var(--border-radius);
    overflow: hidden;
}

.receipt-footer {
    text-align: center;
    font-size: 0.9rem;
    color: #6c757d;
    margin-top: 2rem;
    padding-top: 1rem;
    border-top: 1px dashed #e3e6f0;
}

/* Form Styles */
.form-control {
    border-radius: var(--border-radius);
    border: 1px solid #d1d3e2;
    padding: 0.375rem 0.75rem;
    font-size: 1rem;
    color: #6e707e;
}

.form-control:focus {
    border-color: #bac8f3;
    box-shadow: 0 0 0 0.2rem rgba(78, 115, 223, 0.25);
    color: #6e707e;
}

/* POS Specific Styles */
.pos-container {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 1.5rem;
    height: calc(100vh - 100px);
}

.products-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
    gap: 1rem;
    padding: 1rem;
    background: white;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    overflow-y: auto;
}

.product-card {
    cursor: pointer;
    text-align: center;
    padding: 1rem;
    border-radius: var(--border-radius);
    background: white;
    box-shadow: var(--box-shadow-sm);
    transition: all var(--transition-speed) ease;
    border: 1px solid #e3e6f0;
}

.product-card:hover {
    transform: translateY(-3px);
    box-shadow: var(--box-shadow);
    border-color: #bac8f3;
}

.product-card .product-price {
    color: var(--primary-color);
    font-weight: 700;
}

.product-card .product-stock {
    font-size: 0.8rem;
    color: #858796;
}

.cart-container {
    background: white;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    padding: 1rem;
    display: flex;
    flex-direction: column;
    height: 100%;
}

.cart-header {
    padding-bottom: 1rem;
    border-bottom: 1px solid #e3e6f0;
    margin-bottom: 1rem;
}

.cart-items {
    flex-grow: 1;
    overflow-y: auto;
    padding-right: 0.5rem;
}

.cart-item {
    padding: 0.75rem 0;
    border-bottom: 1px solid #e3e6f0;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.cart-item-info {
    flex-grow: 1;
}

.cart-item-name {
    font-weight: 500;
    margin-bottom: 0.25rem;
}

.cart-item-price {
    font-size: 0.9rem;
    color: #858796;
}

.cart-item-quantity {
    display: flex;
    align-items: center;
}

.cart-item-quantity button {
    width: 28px;
    height: 28px;
    padding: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--border-radius);
}

.cart-item-quantity input {
    width: 40px;
    text-align: center;
    border: 1px solid #d1d3e2;
    border-radius: var(--border-radius);
    margin: 0 0.25rem;
}

.cart-total {
    border-top: 1px solid #e3e6f0;
    padding-top: 1rem;
    margin-top: 1rem;
}

.cart-total-row {
    display: flex;
    justify-content: space-between;
    margin-bottom: 0.5rem;
}

.cart-total-label {
    font-weight: 500;
}

.cart-total-value {
    font-weight: 700;
}

.cart-total-value.discount {
    color: var(--danger-color);
}

.cart-total-value.grand-total {
    color: var(--primary-color);
    font-size: 1.1rem;
}

.discount-row {
    color: var(--danger-color);
    font-weight: 500;
}

/* Responsive Design */
@media (max-width: 992px) {
    .products-grid {
        grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
    }
}

@media (max-width: 768px) {
    .sidebar {
        transform: translateX(-100%);
        z-index: 9999;
    }
    
    .sidebar.active {
        transform: translateX(0);
        box-shadow: 0 0 15px rgba(0,0,0,0.3);
    }
    
    .sidebar-close {
        display: flex;
    }
    
    .main-content {
        margin-left: 0;
        padding: 1rem;
        padding-top: 70px;
        width: 100%;
    }
    
    .top-navbar {
        left: 0;
    }
    
    .main-content.active {
        margin-left: 0;
    }
    
    .pos-container {
        grid-template-columns: 1fr;
        height: auto;
        gap: 1rem;
    }
    
    .products-grid {
        height: 50vh;
        grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
    }
    
    .cart-container {
        height: auto;
        max-height: 50vh;
    }
    
    .receipt-container {
        margin: 1rem;
        padding: 1rem;
    }
}

@media (max-width: 576px) {
    .products-grid {
        grid-template-columns: repeat(auto-fill, minmax(100px, 1fr));
    }
    
    .product-card {
        padding: 0.75rem;
    }
    
    .table th, .table td {
        padding: 0.5rem;
    }
    
    .btn {
        padding: 0.25rem 0.5rem;
        font-size: 0.875rem;
    }
}

@media print {
    body {
        background-color: white;
    }
    
    .sidebar, .no-print {
        display: none !important;
    }
    
    .main-content {
        margin-left: 0;
        padding: 0;
    }
    
    .receipt-container {
        box-shadow: none;
        max-width: 100%;
        margin: 0;
        padding: 0.5rem;
        border: none;
    }
    
    .receipt-footer {
        position: fixed;
        bottom: 0;
        width: 100%;
    }
}

/* Animation Classes */
.fade-in {
    animation: fadeIn 0.3s ease-in;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.scale-in {
    animation: scaleIn 0.3s ease-out;
}

@keyframes scaleIn {
    from {
        opacity: 0;
        transform: scale(0.95);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

.slide-in-right {
    animation: slideInRight 0.3s ease-out;
}

@keyframes slideInRight {
    from {
        opacity: 0;
        transform: translateX(20px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

/* Custom Scrollbar */
::-webkit-scrollbar {
    width: 6px;
    height: 6px;
}

::-webkit-scrollbar-track {
    background: #f1f1f1;
    border-radius: 10px;
}

::-webkit-scrollbar-thumb {
    background: #4e73df;
    border-radius: 10px;
    transition: all 0.3s ease;
}

::-webkit-scrollbar-thumb:hover {
    background: #224abe;
}

/* Helper Classes */
.shadow {
    box-shadow: var(--box-shadow) !important;
}

.shadow-sm {
    box-shadow: var(--box-shadow-sm) !important;
}

.rounded {
    border-radius: var(--border-radius) !important;
}

.text-primary {
    color: var(--primary-color) !important;
}

.text-success {
    color: var(--success-color) !important;
}

.text-danger {
    color: var(--danger-color) !important;
}

.text-warning {
    color: var(--warning-color) !important;
}

.bg-primary {
    background-color: var(--primary-color) !important;
}

.bg-light {
    background-color: var(--light-color) !important;
}

.bg-success {
    background-color: var(--success-color) !important;
}

.bg-danger {
    background-color: var(--danger-color) !important;
}

.bg-warning {
    background-color: var(--warning-color) !important;
}

.border-primary {
    border-color: var(--primary-color) !important;
}

.border-light {
    border-color: #e3e6f0 !important;
}

.fw-bold {
    font-weight: 700 !important;
}

.fw-medium {
    font-weight: 500 !important;
}

.fs-sm {
    font-size: 0.875rem !important;
}

.fs-lg {
    font-size: 1.25rem !important;
}