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

/* === CSS Variables - Calm & Professional === */
:root {
    --primary: #5B7C99;
    --primary-light: #7B9BB8;
    --primary-dark: #3F5A72;

    --secondary: #8B9DC3;
    --accent-blue: #6C8EAD;
    --accent-green: #7FA99B;
    --accent-purple: #9B8FB9;
    --accent-orange: #C4A57B;

    --gray-50: #FAFBFC;
    --gray-100: #F5F7FA;
    --gray-200: #E4E7EB;
    --gray-300: #CBD2D9;
    --gray-400: #9AA5B1;
    --gray-500: #7B8794;
    --gray-600: #616E7C;
    --gray-700: #52606D;
    --gray-800: #3E4C59;
    --gray-900: #323F4B;

    --white: #FFFFFF;
    --success: #7FA99B;
    --warning: #C4A57B;
    --danger: #C17B7B;
    --info: #6C8EAD;

    --sidebar-width: 260px;
    --header-height: 80px;

    --shadow-xs: 0 1px 2px 0 rgba(0, 0, 0, 0.03);
    --shadow-sm: 0 1px 3px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.08);

    --transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    --radius-sm: 6px;
    --radius-md: 8px;
    --radius-lg: 12px;
}

/* === Base === */
body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Noto Sans KR', Roboto, sans-serif;
    background: var(--gray-100);
    color: var(--gray-800);
    line-height: 1.6;
    font-size: 14px;
}

/* === Sidebar === */
.sidebar {
    position: fixed;
    left: 0;
    top: 0;
    width: var(--sidebar-width);
    height: 100vh;
    background: var(--white);
    border-right: 1px solid var(--gray-200);
    display: flex;
    flex-direction: column;
    z-index: 100;
}

.sidebar-header {
    padding: 24px 20px;
    border-bottom: 1px solid var(--gray-200);
}

.sidebar-header h1 {
    font-size: 18px;
    font-weight: 600;
    color: var(--gray-800);
    display: flex;
    align-items: center;
    gap: 10px;
}

.sidebar-header i {
    color: var(--primary);
    font-size: 20px;
}

.sidebar-nav {
    flex: 1;
    padding: 20px 0;
    overflow-y: auto;
}

.nav-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 20px;
    margin: 2px 12px;
    color: var(--gray-600);
    text-decoration: none;
    border-radius: var(--radius-md);
    transition: var(--transition);
    font-size: 14px;
    font-weight: 500;
}

.nav-item i {
    width: 20px;
    font-size: 16px;
}

.nav-item:hover {
    background: var(--gray-100);
    color: var(--gray-800);
}

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

.sidebar-footer {
    padding: 20px;
    border-top: 1px solid var(--gray-200);
}

.user-info {
    display: flex;
    align-items: center;
    gap: 10px;
    color: var(--gray-600);
    font-size: 13px;
}

.user-info i {
    font-size: 20px;
}

/* === Main Content === */
.main-content {
    margin-left: var(--sidebar-width);
    min-height: 100vh;
}

.sidebar-toggle {
    display: none;
    border: 1px solid var(--gray-300);
    background: var(--white);
    color: var(--gray-700);
    border-radius: var(--radius-md);
    padding: 8px 12px;
    cursor: pointer;
    align-items: center;
    justify-content: center;
    font-size: 16px;
}

.sidebar-toggle i {
    pointer-events: none;
}

.sidebar-backdrop {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.35);
    z-index: 90;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
}

.sidebar-backdrop.active {
    opacity: 1;
    visibility: visible;
}

body.sidebar-locked {
    overflow: hidden;
}

.page-header {
    background: var(--white);
    padding: 24px 32px;
    border-bottom: 1px solid var(--gray-200);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.header-left h2 {
    font-size: 24px;
    font-weight: 600;
    color: var(--gray-900);
    margin-bottom: 4px;
}

.page-description {
    font-size: 13px;
    color: var(--gray-500);
}

.header-right {
    display: flex;
    gap: 12px;
}

/* === Content Wrapper === */
.content-wrapper {
    padding: 32px;
    max-width: 1600px;
}

/* === Buttons === */
.btn-primary,
.btn-secondary,
.btn-icon,
.btn-text {
    padding: 10px 18px;
    border: none;
    border-radius: var(--radius-md);
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

.btn-primary.is-disabled,
.btn-secondary.is-disabled,
.btn-icon.is-disabled,
.btn-text.is-disabled,
button.is-disabled {
    opacity: 0.5;
    cursor: not-allowed;
    pointer-events: none;
    box-shadow: none;
    transform: none;
}

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

.btn-primary:hover {
    background: var(--primary-dark);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.btn-secondary {
    background: var(--white);
    color: var(--gray-700);
    border: 1px solid var(--gray-300);
}

.btn-secondary:hover {
    background: var(--gray-50);
    border-color: var(--gray-400);
}

.btn-icon {
    background: var(--white);
    color: var(--gray-600);
    border: 1px solid var(--gray-300);
    padding: 10px 12px;
}

.btn-icon:hover {
    background: var(--gray-50);
    color: var(--gray-800);
}

.btn-text {
    background: transparent;
    color: var(--primary);
    padding: 8px 12px;
}

.btn-text:hover {
    background: var(--gray-100);
}

/* === Filter Sections === */
.filter-compact {
    background: var(--white);
    padding: 20px 24px;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    margin-bottom: 24px;
    display: flex;
    align-items: center;
    gap: 16px;
}

.filter-panel {
    background: var(--white);
    padding: 24px;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    margin-bottom: 24px;
}

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

.filter-header h3 {
    font-size: 16px;
    font-weight: 600;
    color: var(--gray-800);
    display: flex;
    align-items: center;
    gap: 8px;
}

.filter-header i {
    color: var(--primary);
}

.filter-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 16px;
    margin-bottom: 20px;
}

.filter-group {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.filter-group label {
    font-size: 13px;
    font-weight: 500;
    color: var(--gray-700);
}

.filter-separator {
    color: var(--gray-400);
    padding: 0 8px;
    align-self: center;
}

.form-input {
    padding: 9px 12px;
    border: 1px solid var(--gray-300);
    border-radius: var(--radius-sm);
    font-size: 14px;
    transition: var(--transition);
    background: var(--white);
    color: var(--gray-800);
}

.form-input:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(91, 124, 153, 0.1);
}

.filter-actions {
    display: flex;
    justify-content: flex-end;
    gap: 12px;
}

/* === Metrics Grid === */
.metrics-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 20px;
    margin-bottom: 32px;
}

.metric-card {
    background: var(--white);
    padding: 24px;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    display: flex;
    align-items: center;
    gap: 20px;
    transition: var(--transition);
}

.metric-card:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}

.metric-icon {
    width: 56px;
    height: 56px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    flex-shrink: 0;
}

.metric-icon.bg-blue {
    background: linear-gradient(135deg, rgba(108, 142, 173, 0.1), rgba(108, 142, 173, 0.2));
    color: var(--accent-blue);
}

.metric-icon.bg-green {
    background: linear-gradient(135deg, rgba(127, 169, 155, 0.1), rgba(127, 169, 155, 0.2));
    color: var(--accent-green);
}

.metric-icon.bg-purple {
    background: linear-gradient(135deg, rgba(155, 143, 185, 0.1), rgba(155, 143, 185, 0.2));
    color: var(--accent-purple);
}

.metric-icon.bg-orange {
    background: linear-gradient(135deg, rgba(196, 165, 123, 0.1), rgba(196, 165, 123, 0.2));
    color: var(--accent-orange);
}

.metric-content {
    flex: 1;
}

.metric-label {
    font-size: 13px;
    color: var(--gray-500);
    margin-bottom: 4px;
}

.metric-value {
    font-size: 26px;
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: 4px;
}

.metric-change {
    font-size: 12px;
    color: var(--gray-500);
}

/* === Summary Stats === */
.summary-stats {
    display: flex;
    gap: 20px;
    background: var(--white);
    padding: 20px 24px;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    margin-bottom: 24px;
}

.stat-item {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.stat-item:not(:last-child) {
    border-right: 1px solid var(--gray-200);
}

.stat-label {
    font-size: 12px;
    color: var(--gray-500);
    font-weight: 500;
}

.stat-value {
    font-size: 22px;
    font-weight: 700;
    color: var(--gray-800);
}

.stat-item.positive .stat-value {
    color: var(--success);
}

.stat-item.negative .stat-value {
    color: var(--danger);
}

/* === Card === */
.card {
    background: var(--white);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    margin-bottom: 24px;
    overflow: hidden;
}

.card-header {
    padding: 20px 24px;
    border-bottom: 1px solid var(--gray-200);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.card-header h3 {
    font-size: 16px;
    font-weight: 600;
    color: var(--gray-800);
}

.link {
    color: var(--primary);
    text-decoration: none;
    font-size: 13px;
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 6px;
    transition: var(--transition);
}

.link:hover {
    color: var(--primary-dark);
}

/* === Charts === */
.charts-section {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 24px;
    margin-bottom: 32px;
}

.charts-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 24px;
    margin-bottom: 32px;
}

.chart-card {
    background: var(--white);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    overflow: hidden;
}

.chart-card.full-width {
    grid-column: 1 / -1;
}

.chart-content {
    padding: 24px;
}

.chart-legend {
    display: flex;
    gap: 16px;
    font-size: 12px;
}

/* === Tables === */
.table-wrapper {
    overflow-x: auto;
}

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

.data-table thead {
    background: var(--gray-50);
    border-bottom: 1px solid var(--gray-200);
}

.data-table th {
    padding: 12px 16px;
    text-align: left;
    font-size: 13px;
    font-weight: 600;
    color: var(--gray-700);
    white-space: nowrap;
}

.data-table tbody tr {
    border-bottom: 1px solid var(--gray-200);
    transition: var(--transition);
}

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

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

.data-table td {
    padding: 14px 16px;
    font-size: 13px;
    color: var(--gray-700);
    max-width: 0;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.empty-state {
    text-align: center;
    padding: 60px 20px;
    color: var(--gray-400);
}

.empty-state i {
    font-size: 40px;
    margin-bottom: 12px;
    display: block;
    opacity: 0.4;
}

.empty-state p {
    font-size: 14px;
}

/* === Table Footer === */
.table-footer {
    padding: 16px 24px;
    border-top: 1px solid var(--gray-200);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.page-info {
    font-size: 13px;
    color: var(--gray-500);
}

/* === Pagination === */
.pagination {
    display: flex;
    gap: 6px;
}

.pagination button {
    padding: 6px 12px;
    border: 1px solid var(--gray-300);
    background: var(--white);
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: var(--transition);
    font-size: 13px;
    color: var(--gray-700);
    min-width: 36px;
}

.pagination button:hover:not(:disabled) {
    background: var(--primary);
    color: var(--white);
    border-color: var(--primary);
}

.pagination button:disabled {
    opacity: 0.4;
    cursor: not-allowed;
}

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

/* === Status Badges === */
.badge {
    display: inline-block;
    padding: 4px 10px;
    border-radius: 12px;
    font-size: 12px;
    font-weight: 500;
    white-space: nowrap;
}

.badge-success {
    background: rgba(127, 169, 155, 0.12);
    color: var(--success);
}

.badge-warning {
    background: rgba(196, 165, 123, 0.12);
    color: var(--warning);
}

.badge-info {
    background: rgba(108, 142, 173, 0.12);
    color: var(--info);
}

.badge-danger {
    background: rgba(193, 123, 123, 0.12);
    color: var(--danger);
}

.badge-gray {
    background: var(--gray-100);
    color: var(--gray-600);
}

/* === Loading Overlay === */
.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(255, 255, 255, 0.9);
    display: none;
    justify-content: center;
    align-items: center;
    flex-direction: column;
    gap: 16px;
    z-index: 9999;
}

.loading-overlay.active {
    display: flex;
}

.spinner {
    width: 40px;
    height: 40px;
    border: 3px solid var(--gray-200);
    border-top-color: var(--primary);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

.loading-overlay p {
    color: var(--gray-600);
    font-size: 14px;
    font-weight: 500;
}

/* === Toast Notification === */
.toast {
    position: fixed;
    bottom: 24px;
    right: 24px;
    background: var(--gray-900);
    color: var(--white);
    padding: 14px 20px;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    font-size: 14px;
    opacity: 0;
    transform: translateY(100px);
    transition: var(--transition);
    z-index: 10000;
}

.toast.show {
    opacity: 1;
    transform: translateY(0);
}

/* === Analytics Section === */
.analytics-section {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(500px, 1fr));
    gap: 24px;
    margin-bottom: 32px;
}

/* === Activity Section === */
.activity-section {
    margin-bottom: 32px;
}

/* === Responsive === */
@media (max-width: 1024px) {
    .sidebar {
        transform: translateX(-100%);
        transition: var(--transition);
    }

    body.sidebar-open .sidebar {
        transform: translateX(0);
        box-shadow: var(--shadow-lg);
    }

    .main-content {
        margin-left: 0;
    }

    .sidebar-toggle {
        display: inline-flex;
    }

    .page-header {
        width: 100%;
        gap: 16px;
    }

    body.sidebar-open .sidebar-backdrop {
        opacity: 1;
        visibility: visible;
    }

    .content-wrapper {
        padding: 20px;
    }

    .charts-section,
    .charts-grid,
    .analytics-section {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .page-header {
        padding: 20px;
        flex-direction: column;
        align-items: flex-start;
        gap: 16px;
    }

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

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

    .summary-stats {
        flex-direction: column;
    }

    .stat-item:not(:last-child) {
        border-right: none;
        border-bottom: 1px solid var(--gray-200);
        padding-bottom: 12px;
    }

    .table-footer {
        flex-direction: column;
        gap: 16px;
        align-items: flex-start;
    }
}

/* === Modal Styles === */
.modal {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    overflow: auto;
    background-color: rgba(0, 0, 0, 0.5);
    animation: fadeIn 0.2s ease-in-out;
}

.modal.active {
    display: flex;
    justify-content: center;
    align-items: center;
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

.modal-content {
    background-color: var(--white);
    margin: auto;
    padding: 0;
    border-radius: var(--radius-lg);
    width: 90%;
    max-width: 900px;
    max-height: 85vh;
    overflow: hidden;
    box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    animation: slideDown 0.3s ease-in-out;
    display: flex;
    flex-direction: column;
}

@keyframes slideDown {
    from {
        transform: translateY(-50px);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 24px;
    border-bottom: 1px solid var(--gray-200);
    background: var(--gray-50);
}

.modal-header h2 {
    font-size: 18px;
    font-weight: 600;
    color: var(--gray-800);
    display: flex;
    align-items: center;
    gap: 10px;
}

.modal-header h2 i {
    color: var(--primary);
}

.modal-close {
    background: none;
    border: none;
    font-size: 24px;
    color: var(--gray-500);
    cursor: pointer;
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-sm);
    transition: var(--transition);
}

.modal-close:hover {
    background: var(--gray-200);
    color: var(--gray-700);
}

.modal-body {
    padding: 24px;
    overflow-y: auto;
    flex: 1;
}

.order-info-section {
    margin-bottom: 24px;
    padding: 16px;
    background: var(--gray-50);
    border-radius: var(--radius-md);
    border: 1px solid var(--gray-200);
}

.order-info-section h3 {
    font-size: 15px;
    font-weight: 600;
    color: var(--gray-800);
    margin-bottom: 12px;
}

.info-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 12px;
}

.info-item {
    display: flex;
    gap: 8px;
    align-items: center;
}

.info-item .label {
    font-weight: 600;
    color: var(--gray-700);
    min-width: 80px;
}

.info-item .value {
    color: var(--gray-600);
    flex: 1;
}

.copy-btn {
    background: transparent;
    border: 1px solid transparent;
    color: var(--gray-300);
    cursor: pointer;
    padding: 2px 4px;
    border-radius: 4px;
    font-size: 11px;
    height: 20px;
    width: 20px;
    transition: var(--transition);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    opacity: 1;
}

.copy-btn:hover {
    background: rgba(91, 124, 153, 0.04);
    border-color: rgba(91, 124, 153, 0.08);
    color: var(--gray-500);
}

.copy-btn:active {
    background: rgba(91, 124, 153, 0.08);
    transform: scale(0.92);
}

.items-section h3 {
    font-size: 15px;
    font-weight: 600;
    color: var(--gray-800);
    margin-bottom: 16px;
}

/* Modal specific table styles */
.modal .table-wrapper {
    border: 1px solid var(--gray-200);
    border-radius: var(--radius-md);
    overflow: hidden;
}

.modal .data-table {
    font-size: 13px;
}

.modal .data-table th {
    background: var(--gray-50);
    font-size: 12px;
    padding: 10px 12px;
}

.modal .data-table td {
    padding: 10px 12px;
}

/* Clickable table row */
.data-table tbody tr.clickable {
    cursor: pointer;
    transition: var(--transition);
}

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

@media (max-width: 768px) {
    .modal-content {
        width: 95%;
        max-height: 90vh;
    }

    .modal-body {
        padding: 16px;
    }

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

    .modal .data-table {
        font-size: 12px;
    }

    .modal .data-table th,
    .modal .data-table td {
        padding: 8px;
    }
}

/* === Resizable Table Columns === */
.resizable-table th {
    position: relative;
    user-select: none;
}

.resize-handle {
    position: absolute;
    top: 0;
    right: 0;
    width: 8px;
    height: 100%;
    cursor: col-resize;
    z-index: 1;
    background: transparent;
}

.resize-handle:hover {
    background: rgba(91, 124, 153, 0.1);
}

.resizable-table th.resizing {
    background: var(--gray-100);
    user-select: none;
}

/* Prevent text selection during resize */
.resizable-table th.resizing * {
    pointer-events: none;
}

/* === Column Selector Modal === */
.column-selector-info {
    padding: 12px 16px;
    background: var(--gray-50);
    border-radius: var(--radius-md);
    border: 1px solid var(--gray-200);
    margin-bottom: 20px;
}

.column-selector-info p {
    margin: 0;
    font-size: 13px;
    color: var(--gray-600);
}

.column-selector-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
    gap: 12px;
    margin-bottom: 20px;
    max-height: 400px;
    overflow-y: auto;
    padding: 4px;
}

.column-checkbox {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 12px;
    border: 1px solid var(--gray-200);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: var(--transition);
    background: var(--white);
    user-select: none;
}

.column-checkbox:hover {
    background: var(--gray-50);
    border-color: var(--primary);
}

.column-checkbox input[type="checkbox"] {
    width: 18px;
    height: 18px;
    cursor: pointer;
    accent-color: var(--primary);
}

.column-checkbox span {
    font-size: 14px;
    color: var(--gray-700);
    font-weight: 500;
}

.column-checkbox input[type="checkbox"]:checked + span {
    color: var(--primary);
}

.column-selector-actions {
    display: flex;
    gap: 8px;
    padding: 16px 0;
    border-top: 1px solid var(--gray-200);
    border-bottom: 1px solid var(--gray-200);
    margin-bottom: 0;
}

.modal-footer {
    padding: 16px 24px;
    background: var(--gray-50);
    border-top: 1px solid var(--gray-200);
    display: flex;
    justify-content: flex-end;
    gap: 12px;
}

@media (max-width: 768px) {
    .column-selector-grid {
        grid-template-columns: 1fr;
    }

    .column-selector-actions {
        flex-direction: column;
    }
}