/**
 * Admin Dashboard Styles
 */

/* ===== Main Layout ===== */
.admin-main {
    max-width: 1400px;
    margin: 0 auto;
    padding: var(--spacing-6);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-6);
}

/* ===== Stats Grid ===== */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-4);
}

.stat-card {
    background: var(--color-white);
    border: 1px solid var(--color-gray-200);
    border-radius: var(--radius-xl);
    padding: var(--spacing-5);
    display: flex;
    align-items: center;
    gap: var(--spacing-4);
    transition: box-shadow var(--transition-normal);
}

.stat-card:hover {
    box-shadow: var(--shadow-md);
}

.stat-icon {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.stat-icon-total {
    background: #dbeafe;
    color: #2563eb;
}

.stat-icon-paid {
    background: #d1fae5;
    color: #059669;
}

.stat-icon-pending {
    background: #fef3c7;
    color: #d97706;
}

.stat-icon-amount {
    background: #ede9fe;
    color: #7c3aed;
}

.stat-info {
    display: flex;
    flex-direction: column;
}

.stat-value {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    color: var(--color-gray-900);
    line-height: 1.2;
}

.stat-label {
    font-size: var(--font-size-sm);
    color: var(--color-gray-500);
}

/* ===== Filters Bar ===== */
.filters-bar {
    background: var(--color-white);
    border: 1px solid var(--color-gray-200);
    border-radius: var(--radius-xl);
    padding: var(--spacing-4) var(--spacing-5);
    display: flex;
    align-items: center;
    gap: var(--spacing-4);
    flex-wrap: wrap;
}

.search-box {
    display: flex;
    align-items: center;
    gap: var(--spacing-2);
    background: var(--color-gray-50);
    border: 1px solid var(--color-gray-300);
    border-radius: var(--radius-md);
    padding: var(--spacing-2) var(--spacing-3);
    flex: 1;
    min-width: 250px;
}

.search-box svg {
    color: var(--color-gray-400);
    flex-shrink: 0;
}

.search-box input {
    border: none;
    background: transparent;
    outline: none;
    width: 100%;
    font-family: var(--font-family);
    font-size: var(--font-size-sm);
    color: var(--color-gray-700);
}

.filter-group {
    display: flex;
    align-items: center;
    gap: var(--spacing-2);
    flex-wrap: wrap;
}

.filter-group select,
.filter-group input[type="date"] {
    padding: var(--spacing-2) var(--spacing-3);
    font-size: var(--font-size-sm);
    border: 1px solid var(--color-gray-300);
    border-radius: var(--radius-md);
    background: var(--color-white);
    font-family: var(--font-family);
    color: var(--color-gray-700);
}

/* ===== Invoices Table ===== */
.invoices-table-container {
    background: var(--color-white);
    border: 1px solid var(--color-gray-200);
    border-radius: var(--radius-xl);
    overflow: hidden;
}

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

.invoices-table thead th {
    background: var(--color-gray-50);
    color: var(--color-gray-600);
    font-size: var(--font-size-xs);
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    padding: var(--spacing-3) var(--spacing-4);
    text-align: right;
    border-bottom: 1px solid var(--color-gray-200);
    white-space: nowrap;
}

.invoices-table tbody td {
    padding: var(--spacing-3) var(--spacing-4);
    font-size: var(--font-size-sm);
    color: var(--color-gray-700);
    border-bottom: 1px solid var(--color-gray-100);
    vertical-align: middle;
}

.invoices-table tbody tr {
    transition: background-color var(--transition-fast);
}

.invoices-table tbody tr:hover {
    background-color: var(--color-gray-50);
}

.invoices-table tbody tr:last-child td {
    border-bottom: none;
}

.invoices-table .loading-row td,
.invoices-table .empty-row td {
    text-align: center;
    padding: 60px var(--spacing-4);
    color: var(--color-gray-400);
    font-size: var(--font-size-base);
}

/* Status select dropdown */
.status-select {
    padding: 4px 8px;
    font-size: var(--font-size-xs);
    font-weight: 600;
    border-radius: 9999px;
    border: 1px solid transparent;
    cursor: pointer;
    font-family: var(--font-family);
    appearance: none;
    -webkit-appearance: none;
    text-align: center;
    min-width: 90px;
}

.status-select.status-draft {
    background: #f3f4f6;
    color: #6b7280;
    border-color: #e5e7eb;
}

.status-select.status-sent {
    background: #dbeafe;
    color: #2563eb;
    border-color: #bfdbfe;
}

.status-select.status-paid {
    background: #d1fae5;
    color: #059669;
    border-color: #a7f3d0;
}

.status-select.status-overdue {
    background: #fee2e2;
    color: #dc2626;
    border-color: #fecaca;
}

.status-select.status-cancelled {
    background: #fef3c7;
    color: #d97706;
    border-color: #fde68a;
}

.status-select:focus {
    outline: none;
    box-shadow: 0 0 0 2px var(--color-primary-light);
}

/* Invoice number link */
.invoice-number-link {
    color: var(--color-primary);
    font-weight: 600;
    cursor: pointer;
    text-decoration: none;
}

.invoice-number-link:hover {
    text-decoration: underline;
}

/* Amount column */
.amount-cell {
    font-weight: 600;
    color: var(--color-gray-900);
    white-space: nowrap;
}

/* Status badges */
.status-badge {
    display: inline-block;
    padding: 3px 10px;
    font-size: var(--font-size-xs);
    font-weight: 600;
    border-radius: 9999px;
    white-space: nowrap;
}

.status-draft {
    background: #f3f4f6;
    color: #6b7280;
}

.status-sent {
    background: #dbeafe;
    color: #2563eb;
}

.status-paid {
    background: #d1fae5;
    color: #059669;
}

.status-overdue {
    background: #fee2e2;
    color: #dc2626;
}

.status-cancelled {
    background: #fef3c7;
    color: #d97706;
}

/* Action buttons */
.action-buttons {
    display: flex;
    gap: var(--spacing-1);
}

.btn-action {
    padding: 6px;
    background: none;
    border: 1px solid var(--color-gray-200);
    border-radius: var(--radius-sm);
    color: var(--color-gray-500);
    cursor: pointer;
    transition: all var(--transition-fast);
    display: flex;
    align-items: center;
    justify-content: center;
}

.btn-action:hover {
    background: var(--color-gray-50);
    color: var(--color-gray-700);
    border-color: var(--color-gray-300);
}

.btn-action.btn-view:hover {
    color: var(--color-primary);
    border-color: var(--color-primary);
    background: var(--color-primary-light);
}

.btn-action.btn-delete:hover {
    color: var(--color-danger);
    border-color: var(--color-danger);
    background: var(--color-danger-light);
}

/* ===== Pagination ===== */
.pagination {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-2);
}

.pagination button {
    padding: var(--spacing-2) var(--spacing-3);
    background: var(--color-white);
    border: 1px solid var(--color-gray-300);
    border-radius: var(--radius-md);
    color: var(--color-gray-700);
    font-family: var(--font-family);
    font-size: var(--font-size-sm);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.pagination button:hover:not(:disabled) {
    background: var(--color-gray-50);
    border-color: var(--color-gray-400);
}

.pagination button.active {
    background: var(--color-primary);
    color: var(--color-white);
    border-color: var(--color-primary);
}

.pagination button:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

/* ===== Modal ===== */
.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.5);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    padding: var(--spacing-6);
}

.modal-overlay.show {
    display: flex;
}

.modal {
    background: var(--color-white);
    border-radius: var(--radius-xl);
    width: 100%;
    max-width: 800px;
    max-height: 90vh;
    display: flex;
    flex-direction: column;
    box-shadow: var(--shadow-lg);
}

.modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-4) var(--spacing-6);
    border-bottom: 1px solid var(--color-gray-200);
}

.modal-header h2 {
    font-size: var(--font-size-lg);
    font-weight: 700;
    color: var(--color-gray-900);
}

.btn-close {
    background: none;
    border: none;
    color: var(--color-gray-400);
    cursor: pointer;
    padding: var(--spacing-1);
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
}

.btn-close:hover {
    color: var(--color-gray-700);
    background: var(--color-gray-100);
}

.modal-body {
    padding: var(--spacing-6);
    overflow-y: auto;
    flex: 1;
}

.modal-footer {
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: var(--spacing-3);
    padding: var(--spacing-4) var(--spacing-6);
    border-top: 1px solid var(--color-gray-200);
}

/* ===== Invoice Detail in Modal ===== */
.invoice-detail {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-5);
}

.detail-section {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-2);
}

.detail-section h3 {
    font-size: var(--font-size-sm);
    font-weight: 700;
    color: var(--color-gray-500);
    padding-bottom: var(--spacing-2);
    border-bottom: 1px solid var(--color-gray-100);
}

.detail-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-3);
}

.detail-item {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.detail-item .label {
    font-size: var(--font-size-xs);
    color: var(--color-gray-500);
}

.detail-item .value {
    font-size: var(--font-size-sm);
    font-weight: 600;
    color: var(--color-gray-800);
}

/* Items table in modal */
.detail-items-table {
    width: 100%;
    border-collapse: collapse;
    font-size: var(--font-size-sm);
}

.detail-items-table th {
    background: var(--color-gray-50);
    padding: var(--spacing-2) var(--spacing-3);
    text-align: right;
    font-weight: 600;
    color: var(--color-gray-600);
    font-size: var(--font-size-xs);
    border-bottom: 1px solid var(--color-gray-200);
}

.detail-items-table td {
    padding: var(--spacing-2) var(--spacing-3);
    border-bottom: 1px solid var(--color-gray-100);
    color: var(--color-gray-700);
}

.detail-totals {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: var(--spacing-2);
    padding-top: var(--spacing-3);
}

.detail-total-row {
    display: flex;
    justify-content: space-between;
    width: 250px;
    font-size: var(--font-size-sm);
}

.detail-total-row.grand-total {
    font-weight: 700;
    font-size: var(--font-size-base);
    padding-top: var(--spacing-2);
    border-top: 2px solid var(--color-gray-800);
    color: var(--color-primary);
}

/* Nav link styling */
.nav a.btn {
    text-decoration: none;
}

/* ===== Responsive ===== */
@media (max-width: 1024px) {
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .admin-main {
        padding: var(--spacing-4);
    }

    .stats-grid {
        grid-template-columns: 1fr;
    }

    .filters-bar {
        flex-direction: column;
        align-items: stretch;
    }

    .search-box {
        min-width: auto;
    }

    .filter-group {
        flex-direction: column;
    }

    .filter-group select,
    .filter-group input[type="date"],
    .filter-group .btn {
        width: 100%;
    }

    .invoices-table-container {
        overflow-x: auto;
    }

    .invoices-table {
        min-width: 700px;
    }

    .detail-grid {
        grid-template-columns: 1fr;
    }

    .modal {
        max-height: 95vh;
        margin: var(--spacing-2);
    }
}