/* style.css */
:root {
    --primary: #667eea;
    --secondary: #764ba2;
    --success: #10b981;
    --danger: #ef4444;
    --warning: #f59e0b;
    --info: #3b82f6;
    --light: #f8fafc;
    --dark: #1e293b;
    --gray: #64748b;
}

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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: #f1f5f9;
    color: var(--dark);
}

/* Header */
.header {
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    color: white;
    padding: 15px 0;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 20px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
}

.logo h1 {
    font-size: 24px;
    font-weight: 600;
}

.user-info {
    display: flex;
    align-items: center;
    gap: 15px;
}

/* Sidebar */
.sidebar {
    background: white;
    min-height: calc(100vh - 70px);
    box-shadow: 2px 0 5px rgba(0,0,0,0.1);
    width: 250px;
    position: fixed;
}

.nav-menu {
    padding: 20px 0;
}

.nav-item {
    list-style: none;
}

.nav-link {
    display: flex;
    align-items: center;
    padding: 12px 20px;
    color: var(--dark);
    text-decoration: none;
    transition: all 0.3s;
    gap: 10px;
}

.nav-link:hover {
    background: var(--light);
    color: var(--primary);
}

.nav-link.active {
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    color: white;
}

/* Main Content */
.main-content {
    margin-left: 250px;
    padding: 20px;
}

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

/* Cards */
.card {
    background: white;
    border-radius: 10px;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
    margin-bottom: 20px;
    overflow: hidden;
}

.card-header {
    padding: 20px;
    border-bottom: 1px solid #e2e8f0;
    background: var(--light);
}

.card-body {
    padding: 20px;
}

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

.stat-card {
    background: white;
    border-radius: 10px;
    padding: 20px;
    display: flex;
    align-items: center;
    gap: 20px;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
    transition: transform 0.3s;
}

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

.stat-icon {
    width: 60px;
    height: 60px;
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
}

.stat-info h3 {
    font-size: 14px;
    color: var(--gray);
    margin-bottom: 5px;
}

.stat-value {
    font-size: 24px;
    font-weight: 600;
}

.bg-primary { background: #dbeafe; color: var(--primary); }
.bg-success { background: #d1fae5; color: var(--success); }
.bg-warning { background: #fef3c7; color: var(--warning); }
.bg-danger { background: #fee2e2; color: var(--danger); }
.bg-info { background: #dbeafe; color: var(--info); }

/* Tables */
.table {
    width: 100%;
    border-collapse: collapse;
}

.table th {
    background: var(--light);
    padding: 12px;
    text-align: left;
    font-weight: 600;
    border-bottom: 2px solid #e2e8f0;
}

.table td {
    padding: 12px;
    border-bottom: 1px solid #e2e8f0;
}

.table tr:hover {
    background: var(--light);
}

/* Forms */
.form-control {
    width: 100%;
    padding: 10px 15px;
    border: 2px solid #e2e8f0;
    border-radius: 8px;
    font-size: 16px;
    transition: border 0.3s;
}

.form-control:focus {
    border-color: var(--primary);
    outline: none;
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 5px;
    font-weight: 500;
}

/* Buttons */
.btn {
    padding: 10px 20px;
    border: none;
    border-radius: 8px;
    font-size: 16px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    color: white;
}

.btn-primary:hover {
    opacity: 0.9;
    transform: translateY(-2px);
}

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

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

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

.btn-block {
    width: 100%;
}

/* POS Specific */
.pos-container {
    padding: 0;
}

.product-card {
    background: white;
    border-radius: 8px;
    overflow: hidden;
    cursor: pointer;
    transition: all 0.3s;
    border: 1px solid #e2e8f0;
}

.product-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 20px rgba(0,0,0,0.1);
}

.product-image {
    height: 120px;
    background: var(--light);
    display: flex;
    align-items: center;
    justify-content: center;
}

.product-image img {
    max-width: 100%;
    max-height: 100%;
    object-fit: cover;
}

.no-image {
    font-size: 48px;
    color: var(--gray);
}

.product-info {
    padding: 10px;
}

.product-info h6 {
    margin-bottom: 5px;
    font-size: 14px;
}

.product-info .price {
    color: var(--success);
    font-weight: 600;
    font-size: 16px;
}

/* Cart */
.cart-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 10px 0;
    border-bottom: 1px solid #e2e8f0;
}

.cart-item-info h6 {
    margin-bottom: 5px;
}

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

.quantity-controls {
    display: flex;
    align-items: center;
    gap: 5px;
}

.btn-qty {
    width: 25px;
    height: 25px;
    border-radius: 50%;
    border: 1px solid #e2e8f0;
    background: white;
    cursor: pointer;
}

.btn-remove {
    color: var(--danger);
    background: none;
    border: none;
    font-size: 20px;
    cursor: pointer;
}

.cart-summary {
    margin-top: 20px;
    padding-top: 20px;
    border-top: 2px solid #e2e8f0;
}

.cart-summary .row {
    margin-bottom: 10px;
}

.total-row {
    margin-top: 10px;
    padding-top: 10px;
    border-top: 1px solid #e2e8f0;
    font-size: 18px;
}

/* Login Page */
.login-page {
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

.login-container {
    width: 100%;
    max-width: 400px;
}

.login-box {
    background: white;
    border-radius: 15px;
    padding: 40px;
    box-shadow: 0 20px 60px rgba(0,0,0,0.3);
}

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

.login-footer {
    text-align: center;
    margin-top: 20px;
    color: var(--gray);
    font-size: 14px;
}

/* Responsive */
@media (max-width: 768px) {
    .sidebar {
        width: 0;
        display: none;
    }
    
    .main-content {
        margin-left: 0;
    }
    
    .stats-grid {
        grid-template-columns: 1fr;
    }
    
    .header-content {
        flex-direction: column;
        gap: 10px;
    }
}

/* Badges */
.badge {
    padding: 4px 8px;
    border-radius: 4px;
    font-size: 12px;
    font-weight: 500;
}

.badge-success {
    background: var(--success);
    color: white;
}

.badge-warning {
    background: var(--warning);
    color: white;
}

.badge-danger {
    background: var(--danger);
    color: white;
}

/* Alerts */
.alert {
    padding: 15px;
    border-radius: 8px;
    margin-bottom: 20px;
}

.alert-success {
    background: #d1fae5;
    color: #065f46;
    border: 1px solid #a7f3d0;
}

.alert-danger {
    background: #fee2e2;
    color: #991b1b;
    border: 1px solid #fecaca;
}

/* Grid System */
.row {
    display: flex;
    flex-wrap: wrap;
    margin: 0 -10px;
}

.col-md-3, .col-md-4, .col-md-6, .col-md-8 {
    padding: 0 10px;
}

.col-md-3 { width: 25%; }
.col-md-4 { width: 33.33%; }
.col-md-6 { width: 50%; }
.col-md-8 { width: 66.66%; }

@media (max-width: 768px) {
    .col-md-3, .col-md-4, .col-md-6, .col-md-8 {
        width: 100%;
    }
}