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

:root {
    --primary-color: #1a1a1a;
    --secondary-color: #2d2d2d;
    --accent-color: #d4af37;
    --text-color: #ffffff;
    --text-secondary: #b0b0b0;
    --success-color: #4caf50;
    --warning-color: #ff9800;
    --danger-color: #f44336;
    --border-color: #3d3d3d;
}

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

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

/* Sidebar */
.sidebar {
    width: 260px;
    background: var(--secondary-color);
    padding: 20px;
    border-right: 1px solid var(--border-color);
}

.logo {
    text-align: center;
    margin-bottom: 40px;
    padding-bottom: 20px;
    border-bottom: 2px solid var(--accent-color);
}

.logo h1 {
    color: var(--accent-color);
    font-size: 28px;
    margin-bottom: 5px;
}

.logo p {
    color: var(--text-secondary);
    font-size: 14px;
}

.menu {
    display: flex;
    flex-direction: column;
    gap: 5px;
}

.menu-item {
    display: flex;
    align-items: center;
    padding: 12px 16px;
    color: var(--text-secondary);
    text-decoration: none;
    border-radius: 8px;
    transition: all 0.3s;
}

.menu-item i {
    margin-right: 12px;
    width: 20px;
}

.menu-item:hover {
    background: rgba(212, 175, 55, 0.1);
    color: var(--accent-color);
}

.menu-item.active {
    background: var(--accent-color);
    color: var(--primary-color);
    font-weight: 600;
}

/* Content */
.content {
    flex: 1;
    padding: 30px;
    overflow-y: auto;
}

.page-header {
    margin-bottom: 30px;
}

.page-header h2 {
    font-size: 32px;
    margin-bottom: 10px;
    color: var(--accent-color);
}

.page-header p {
    color: var(--text-secondary);
}

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

.stat-card {
    background: var(--secondary-color);
    padding: 25px;
    border-radius: 12px;
    border: 1px solid var(--border-color);
}

.stat-card h3 {
    color: var(--text-secondary);
    font-size: 14px;
    font-weight: 500;
    margin-bottom: 10px;
}

.stat-card .value {
    font-size: 32px;
    font-weight: 700;
    color: var(--accent-color);
    margin-bottom: 10px;
}

.stat-card .trend {
    font-size: 14px;
    display: flex;
    align-items: center;
    gap: 5px;
}

.trend.positive {
    color: var(--success-color);
}

.trend.negative {
    color: var(--danger-color);
}

/* Charts */
.charts-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 20px;
    margin-bottom: 30px;
}

.chart-card {
    background: var(--secondary-color);
    padding: 25px;
    border-radius: 12px;
    border: 1px solid var(--border-color);
}

.chart-card h3 {
    margin-bottom: 20px;
    color: var(--accent-color);
}

/* Table */
.table-container {
    background: var(--secondary-color);
    border-radius: 12px;
    border: 1px solid var(--border-color);
    overflow: hidden;
}

.table-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 25px;
    border-bottom: 1px solid var(--border-color);
}

.table-header h3 {
    color: var(--accent-color);
    font-size: 20px;
}

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

table {
    width: 100%;
    border-collapse: collapse;
}

thead {
    background: rgba(212, 175, 55, 0.1);
}

th {
    padding: 15px;
    text-align: left;
    color: var(--accent-color);
    font-weight: 600;
    font-size: 14px;
}

td {
    padding: 15px;
    border-top: 1px solid var(--border-color);
}

tbody tr:hover {
    background: rgba(212, 175, 55, 0.05);
}

/* Buttons */
.btn {
    padding: 10px 20px;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-size: 14px;
    font-weight: 500;
    transition: all 0.3s;
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

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

.btn-primary:hover {
    background: #c9a532;
    transform: translateY(-2px);
}

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

.btn-secondary:hover {
    background: #4d4d4d;
}

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

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

.btn-sm {
    padding: 6px 12px;
    font-size: 12px;
}

/* Badge */
.badge {
    display: inline-block;
    padding: 4px 12px;
    border-radius: 12px;
    font-size: 12px;
    font-weight: 500;
}

.badge-success {
    background: rgba(76, 175, 80, 0.2);
    color: var(--success-color);
}

.badge-warning {
    background: rgba(255, 152, 0, 0.2);
    color: var(--warning-color);
}

.badge-danger {
    background: rgba(244, 67, 54, 0.2);
    color: var(--danger-color);
}

.badge-info {
    background: rgba(33, 150, 243, 0.2);
    color: #2196f3;
}

/* Modal */
.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.active {
    display: flex;
}

.modal-content {
    background: var(--secondary-color);
    padding: 30px;
    border-radius: 12px;
    border: 1px solid var(--border-color);
    max-width: 600px;
    width: 90%;
    max-height: 90vh;
    overflow-y: auto;
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
}

.modal-header h3 {
    color: var(--accent-color);
    font-size: 24px;
}

.close-modal {
    background: none;
    border: none;
    color: var(--text-secondary);
    font-size: 24px;
    cursor: pointer;
}

.close-modal:hover {
    color: var(--text-color);
}

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

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

.form-control {
    width: 100%;
    padding: 12px;
    background: var(--primary-color);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    color: var(--text-color);
    font-size: 14px;
}

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

select.form-control {
    cursor: pointer;
}

.form-actions {
    display: flex;
    justify-content: flex-end;
    gap: 10px;
    margin-top: 30px;
}

/* Search */
.search-box {
    position: relative;
}

.search-box input {
    padding-left: 40px;
}

.search-box i {
    position: absolute;
    left: 12px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-secondary);
}

/* Action buttons in tables */
.action-buttons {
    display: flex;
    gap: 8px;
}

/* Cashier specific */
.cashier-grid {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 20px;
}

.product-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
    gap: 15px;
    margin-bottom: 20px;
}

.product-card {
    background: var(--secondary-color);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 15px;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s;
}

.product-card:hover {
    border-color: var(--accent-color);
    transform: translateY(-2px);
}

.cart-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 10px;
    border-bottom: 1px solid var(--border-color);
}

.cart-total {
    font-size: 24px;
    font-weight: bold;
    color: var(--accent-color);
    text-align: right;
    padding: 20px;
}

/* Responsive */
@media (max-width: 768px) {
    .sidebar {
        width: 80px;
    }
    
    .logo h1 {
        font-size: 16px;
    }
    
    .logo p,
    .menu-item span {
        display: none;
    }
    
    .cashier-grid {
        grid-template-columns: 1fr;
    }
}