/* ==========================================================================
   Base Styles & CSS Variables
   ========================================================================== */
   :root {
    --primary-color: #0056b3;
    --primary-hover: #004494;
    --bg-color: #f4f7f6;
    --text-main: #333333;
    --text-muted: #666666;
    --white: #ffffff;
    --danger-bg: #ffebee;
    --danger-text: #c62828;
    --border-color: #dddddd;
    --border-radius: 8px;
    --transition-speed: 0.3s;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

body.login-body {
    background-color: var(--bg-color);
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    padding: 20px;
}

/* ==========================================================================
   Login Container Styling
   ========================================================================== */
.login-container {
    background-color: var(--white);
    width: 100%;
    max-width: 400px;
    padding: 40px 30px;
    border-radius: var(--border-radius);
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.05);
}

.login-header {
    text-align: center;
    margin-bottom: 30px;
}

.login-header h2 {
    color: var(--text-main);
    font-size: 24px;
    margin-bottom: 5px;
}

.login-header p {
    color: var(--text-muted);
    font-size: 14px;
}

/* ==========================================================================
   Form Elements
   ========================================================================== */
.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    color: var(--text-main);
    font-size: 14px;
    font-weight: 500;
}

.form-group input {
    width: 100%;
    padding: 12px 15px;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    font-size: 15px;
    transition: border-color var(--transition-speed);
}

.form-group input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 2px rgba(0, 86, 179, 0.1);
}

/* ==========================================================================
   Buttons & Alerts
   ========================================================================== */
.btn {
    width: 100%;
    padding: 12px;
    border: none;
    border-radius: var(--border-radius);
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: background-color var(--transition-speed);
}

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

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

.alert {
    padding: 12px 15px;
    border-radius: var(--border-radius);
    margin-bottom: 20px;
    font-size: 14px;
    text-align: center;
}

.alert-danger {
    background-color: var(--danger-bg);
    color: var(--danger-text);
    border: 1px solid #ffcdd2;
}

/* ==========================================================================
   Footer
   ========================================================================== */
.login-footer {
    margin-top: 30px;
    text-align: center;
    font-size: 12px;
    color: var(--text-muted);
}

/* ==========================================================================
   Import Google Fonts (Inter) - Added 800 (Extra Bold)
   ========================================================================== */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800&display=swap');

/* ==========================================================================
   Modern CSS Variables
   ========================================================================== */
:root {
    --primary-color: #4f46e5; /* Modern Indigo */
    --primary-hover: #4338ca;
    --primary-light: #e0e7ff;
    
    --sidebar-bg: #0f172a; /* Slate 900 */
    --sidebar-hover: #1e293b; /* Slate 800 */
    --sidebar-text: #94a3b8; /* Slate 400 */
    --sidebar-active-text: #ffffff;
    
    --bg-color: #f8fafc; /* Very soft slate */
    --card-bg: #ffffff;
    --text-main: #0f172a;
    --text-muted: #64748b;
    
    --danger-color: #ef4444;
    --danger-bg: #fef2f2;
    --danger-text: #b91c1c;
    
    --border-color: #e2e8f0;
    --border-radius-lg: 16px;
    --border-radius-md: 10px;
    --border-radius-sm: 8px;
    
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-hover: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ==========================================================================
   Base Reset
   ========================================================================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    /* Default font weight set to Medium (500) for bolder base text */
    font-family: 'Inter', sans-serif;
    font-weight: 500; 
}

/* Custom Scrollbar */
::-webkit-scrollbar {
    width: 8px;
}
::-webkit-scrollbar-track {
    background: var(--bg-color); 
}
::-webkit-scrollbar-thumb {
    background: #cbd5e1; 
    border-radius: 10px;
}
::-webkit-scrollbar-thumb:hover {
    background: #94a3b8; 
}

/* ==========================================================================
   1. Login Page Styling
   ========================================================================== */
body.login-body {
    background-color: var(--bg-color);
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    padding: 20px;
    color: var(--text-main);
}

.login-container {
    background-color: var(--card-bg);
    width: 100%;
    max-width: 420px;
    padding: 40px 35px;
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-md);
    border: 1px solid var(--border-color);
}

.login-header {
    text-align: center;
    margin-bottom: 35px;
}

.login-header h2 {
    color: var(--text-main);
    font-size: 26px;
    font-weight: 800; /* Extra Bold */
    margin-bottom: 8px;
    letter-spacing: -0.5px;
}

.login-header p {
    color: var(--text-muted);
    font-size: 15px;
    font-weight: 600; /* Semi Bold */
}

.form-group {
    margin-bottom: 22px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    color: var(--text-main);
    font-size: 14px;
    font-weight: 700; /* Bold */
}

.form-group input {
    width: 100%;
    padding: 14px 16px;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-sm);
    font-size: 15px;
    font-weight: 600; /* Semi Bold Input Text */
    transition: var(--transition);
    background-color: var(--bg-color);
}

.form-group input:focus {
    outline: none;
    border-color: var(--primary-color);
    background-color: var(--card-bg);
    box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.15);
}

.btn {
    width: 100%;
    padding: 14px;
    border: none;
    border-radius: var(--border-radius-sm);
    font-size: 16px;
    font-weight: 700; /* Bold Button Text */
    cursor: pointer;
    transition: var(--transition);
}

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

.btn-primary:hover {
    background-color: var(--primary-hover);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.alert {
    padding: 14px 16px;
    border-radius: var(--border-radius-sm);
    margin-bottom: 25px;
    font-size: 14px;
    font-weight: 600;
    text-align: center;
}

.alert-danger {
    background-color: var(--danger-bg);
    color: var(--danger-text);
    border: 1px solid #fca5a5;
}

.login-footer {
    margin-top: 30px;
    text-align: center;
    font-size: 13px;
    color: var(--text-muted);
    font-weight: 600;
}

/* ==========================================================================
   2. Admin Panel Layout (Dashboard)
   ========================================================================== */
.admin-body {
    background-color: var(--bg-color);
    color: var(--text-main);
}

.admin-wrapper {
    display: flex;
    min-height: 100vh;
}

/* --- Sidebar (Premium Dark Theme) --- */
.admin-sidebar {
    width: 260px;
    background-color: var(--sidebar-bg);
    display: flex;
    flex-direction: column;
    box-shadow: 4px 0 10px rgba(0, 0, 0, 0.05);
    z-index: 100;
}

.sidebar-logo {
    padding: 25px 20px;
    text-align: center;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.sidebar-logo h2 {
    color: #ffffff;
    font-size: 24px;
    font-weight: 800; /* Extra Bold */
    letter-spacing: 0.5px;
    margin-bottom: 5px;
}

.sidebar-logo p {
    font-size: 13px;
    color: var(--primary-color);
    font-weight: 700; /* Bold */
    text-transform: uppercase;
    letter-spacing: 1px;
}

.sidebar-menu {
    list-style: none;
    padding: 20px 15px;
    flex: 1;
}

.sidebar-menu li {
    margin-bottom: 5px;
}

.sidebar-menu li a {
    display: flex;
    align-items: center;
    padding: 12px 15px;
    color: var(--sidebar-text);
    text-decoration: none;
    font-size: 15px;
    font-weight: 600; /* Semi Bold */
    border-radius: var(--border-radius-md);
    transition: var(--transition);
}

.sidebar-menu li a:hover, 
.sidebar-menu li a.active {
    background-color: var(--sidebar-hover);
    color: var(--sidebar-active-text);
    font-weight: 700; /* Bold on hover/active */
    transform: translateX(5px);
}

.sidebar-menu li a.logout-btn {
    color: #f87171;
    margin-top: 30px;
    border: 1px solid rgba(239, 68, 68, 0.2);
    font-weight: 700;
}

.sidebar-menu li a.logout-btn:hover {
    background-color: rgba(239, 68, 68, 0.1);
    color: var(--danger-color);
    transform: translateY(-2px);
    box-shadow: var(--shadow-sm);
}

/* --- Main Content & Topbar --- */
.admin-main-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow-x: hidden;
}

.admin-topbar {
    background-color: var(--card-bg);
    padding: 18px 35px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    box-shadow: var(--shadow-sm);
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 90;
}

.topbar-title h3 {
    color: var(--text-main);
    font-size: 19px;
    font-weight: 800; /* Extra Bold */
}

.user-profile {
    display: flex;
    align-items: center;
    gap: 10px;
    background: var(--primary-light);
    padding: 8px 18px;
    border-radius: 20px;
}

.user-profile span {
    font-weight: 700; /* Bold */
    font-size: 14px;
    color: var(--primary-color);
}

.content-wrapper {
    padding: 35px;
    flex: 1;
}

/* --- Dashboard Stats Cards (Glass/Soft UI) --- */
.dashboard-header {
    margin-bottom: 30px;
}

.dashboard-header h2 {
    color: var(--text-main);
    font-size: 28px;
    font-weight: 800; /* Extra Bold */
    margin-bottom: 6px;
    letter-spacing: -0.5px;
}

.dashboard-header p {
    color: var(--text-muted);
    font-size: 16px;
    font-weight: 500;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 25px;
}

.stat-card {
    background-color: var(--card-bg);
    padding: 25px 30px;
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-md);
    border: 1px solid var(--border-color);
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.stat-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 100%;
    background-color: var(--primary-color);
    border-radius: var(--border-radius-lg) 0 0 var(--border-radius-lg);
}

.stat-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-hover);
}

.stat-card.alert-card::before {
    background-color: var(--danger-color);
}

.stat-card h3 {
    font-size: 14px;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 1.2px;
    font-weight: 700; /* Bold */
    margin-bottom: 12px;
}

.stat-card .stat-value {
    font-size: 34px;
    font-weight: 800; /* Extra Bold */
    color: var(--text-main);
}

/* --- Responsive Design Enhancements --- */
@media (max-width: 768px) {
    .admin-wrapper {
        flex-direction: column;
    }
    
    .admin-sidebar {
        width: 100%;
        height: auto;
        box-shadow: none;
    }
    
    .sidebar-menu {
        display: flex;
        overflow-x: auto;
        padding: 10px;
        white-space: nowrap;
        gap: 10px;
    }
    
    .sidebar-menu li {
        margin-bottom: 0;
    }
    
    .sidebar-menu li a:hover {
        transform: translateY(-2px);
    }
    
    .admin-topbar {
        padding: 15px 20px;
    }
    
    .content-wrapper {
        padding: 20px;
    }
}

/* ==========================================================================
   Forms, Tables, and Badges (Appended to style.css)
   ========================================================================== */

/* Buttons Enhancement */
.btn-secondary {
    background-color: #e2e8f0;
    color: var(--text-main);
}
.btn-secondary:hover {
    background-color: #cbd5e1;
}
.btn-sm {
    padding: 6px 12px;
    font-size: 13px;
    border-radius: var(--border-radius-sm);
    border: none;
    cursor: pointer;
    font-weight: 600;
    transition: var(--transition);
}
.btn-danger {
    background-color: var(--danger-bg);
    color: var(--danger-text);
}
.btn-danger:hover {
    background-color: var(--danger-color);
    color: #fff;
}

/* Form Grid */
.form-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
}

/* Success Alert */
.alert-success {
    background-color: #f0fdf4;
    color: #166534;
    border: 1px solid #bbf7d0;
}

/* Data Table Styling */
.table-responsive {
    overflow-x: auto;
    width: 100%;
}
.data-table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 10px;
    min-width: 800px; /* Forces scroll on very small mobile screens */
}
.data-table th, .data-table td {
    padding: 15px;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
    font-size: 14px;
}
.data-table th {
    background-color: var(--bg-color);
    color: var(--text-muted);
    font-weight: 700;
    text-transform: uppercase;
    font-size: 12px;
    letter-spacing: 0.5px;
}
.data-table tbody tr {
    transition: var(--transition);
}
.data-table tbody tr:hover {
    background-color: #f8fafc;
}

/* Badges for Stock Level */
.badge {
    padding: 5px 10px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 700;
    display: inline-block;
}
.badge-success {
    background-color: #dcfce7;
    color: #166534;
}
.badge-danger {
    background-color: #fee2e2;
    color: #991b1b;
}

/* ==========================================================================
   POS (Point of Sale) Styles
   ========================================================================== */
.pos-container {
    display: flex;
    gap: 20px;
    align-items: flex-start;
}

.pos-products {
    flex: 6; /* 60% width */
}

.pos-cart {
    flex: 4; /* 40% width */
    position: sticky;
    top: 90px;
}

/* Product Grid inside POS */
.product-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
    gap: 15px;
    max-height: 600px;
    overflow-y: auto;
    padding-right: 5px;
}

.product-box {
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-md);
    padding: 15px;
    cursor: pointer;
    transition: var(--transition);
    background-color: var(--bg-color);
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}

.product-box:hover {
    border-color: var(--primary-color);
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}

.p-name {
    font-size: 14px;
    font-weight: 700;
    color: var(--text-main);
    margin-bottom: 5px;
    line-height: 1.3;
}

.p-sku {
    font-size: 11px;
    color: var(--text-muted);
    margin-bottom: 10px;
}

.p-price-stock {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: auto;
}

.p-price {
    font-weight: 800;
    color: var(--primary-color);
    font-size: 15px;
}

/* Cart Summary Area */
.cart-summary {
    margin-top: 20px;
    padding-top: 20px;
    border-top: 2px dashed var(--border-color);
}

.summary-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 10px;
    font-size: 15px;
    font-weight: 600;
    color: var(--text-muted);
}

.summary-row.total-row {
    font-size: 22px;
    font-weight: 800;
    color: var(--text-main);
    margin-top: 15px;
    padding-top: 15px;
    border-top: 1px solid var(--border-color);
}

/* Responsive POS */
@media (max-width: 992px) {
    .pos-container {
        flex-direction: column;
    }
    .pos-products, .pos-cart {
        width: 100%;
        flex: none;
    }
    .pos-cart {
        position: static;
    }
}

/* ==========================================================================
   Invoice Design & Print Styles
   ========================================================================== */
.invoice-box {
    max-width: 850px;
    margin: 0 auto;
    padding: 40px;
    background: #fff;
}

.invoice-header {
    display: flex;
    justify-content: space-between;
    border-bottom: 2px solid var(--primary-color);
    padding-bottom: 20px;
}

.company-details p, .invoice-details p {
    font-size: 14px;
    color: var(--text-muted);
    margin-bottom: 4px;
}

.invoice-table th {
    background-color: var(--primary-light);
    color: var(--primary-color);
    font-size: 13px;
    border: none;
}

.invoice-table td {
    padding: 12px 15px;
}

.invoice-summary-box {
    margin-top: 30px;
    width: 350px;
    float: right;
    background-color: var(--bg-color);
    padding: 20px;
    border-radius: var(--border-radius-md);
}

.summary-line {
    display: flex;
    justify-content: space-between;
    font-size: 15px;
    font-weight: 600;
    margin-bottom: 10px;
    color: var(--text-main);
}

.grand-total {
    font-size: 20px;
    font-weight: 800;
    color: var(--primary-color);
    border-top: 2px dashed var(--border-color);
    padding-top: 15px;
    margin-top: 5px;
}

/* Clearfix for float */
.invoice-box::after {
    content: "";
    clear: both;
    display: table;
}

/* Print Specific Styles */
@media print {
    body {
        background-color: white !important;
    }
    .admin-sidebar, 
    .admin-topbar, 
    .no-print {
        display: none !important;
    }
    .admin-main-content {
        margin: 0 !important;
        padding: 0 !important;
        width: 100% !important;
    }
    .content-wrapper {
        padding: 0 !important;
    }
    .invoice-box {
        box-shadow: none !important;
        border: none !important;
        width: 100% !important;
        max-width: 100% !important;
        padding: 0 !important;
    }
    .invoice-summary-box {
        background-color: transparent !important;
    }
}