/* ============================================
   智慧新零售云POS综合管理平台 - 公共样式
   Version: 1.0
   ============================================ */

/* --- CSS Variables --- */
:root {
    --primary-green: #52c41a;
    --primary-green-hover: #73d13d;
    --primary-green-active: #389e0d;
    --primary-green-light: #f6ffed;
    --primary-green-border: #b7eb8f;
    --auxiliary-blue: #1890ff;
    --auxiliary-blue-hover: #40a9ff;
    --auxiliary-blue-active: #096dd9;
    --auxiliary-blue-light: #e6f7ff;
    --auxiliary-blue-border: #91d5ff;

    --menu-bg: #001529;
    --menu-dark-bg: #000c17;
    --menu-text: #ffffffb3;
    --menu-text-active: #ffffff;
    --menu-item-hover-bg: #ffffff1a;
    --menu-item-active-bg: var(--primary-green);

    --header-bg: #ffffff;
    --header-height: 56px;
    --header-shadow: 0 1px 4px rgba(0, 0, 0, 0.08);

    --footer-bg: #f0f2f5;
    --footer-height: 32px;
    --footer-text: #8c8c8c;

    --body-bg: #f0f2f5;
    --card-bg: #ffffff;
    --card-shadow: 0 2px 8px rgba(0, 0, 0, 0.06);
    --card-radius: 6px;

    --text-primary: #262626;
    --text-secondary: #595959;
    --text-tertiary: #8c8c8c;
    --text-disabled: #bfbfbf;

    --border-color: #e8e8e8;
    --border-color-light: #f0f0f0;
    --divider-color: #f0f0f0;

    --success-color: #52c41a;
    --success-bg: #f6ffed;
    --success-border: #b7eb8f;
    --warning-color: #faad14;
    --warning-bg: #fffbe6;
    --warning-border: #ffe58f;
    --error-color: #ff4d4f;
    --error-bg: #fff2f0;
    --error-border: #ffccc7;
    --info-color: #1890ff;
    --info-bg: #e6f7ff;
    --info-border: #91d5ff;

    --sidebar-width: 220px;
    --sidebar-collapsed-width: 64px;

    --font-family: 'Microsoft YaHei', 'PingFang SC', 'Helvetica Neue', Arial, sans-serif;
    --font-size-base: 14px;
    --font-size-sm: 12px;
    --font-size-lg: 16px;
    --font-size-xl: 20px;
    --font-size-xxl: 24px;

    --transition-duration: 0.3s;
    --z-dropdown: 100;
    --z-modal: 1000;
    --z-toast: 2000;
}

/* --- Reset & Base --- */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    font-size: var(--font-size-base);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-family);
    color: var(--text-primary);
    background-color: var(--body-bg);
    line-height: 1.6;
    min-height: 100vh;
}

a {
    color: var(--auxiliary-blue);
    text-decoration: none;
    transition: color var(--transition-duration);
}
a:hover {
    color: var(--auxiliary-blue-hover);
}

ul, ol {
    list-style: none;
}

img {
    max-width: 100%;
    vertical-align: middle;
}

input, select, textarea, button {
    font-family: inherit;
    font-size: inherit;
    outline: none;
}

/* --- Layout --- */
.pos-layout {
    display: flex;
    min-height: 100vh;
}

.pos-sidebar {
    width: var(--sidebar-width);
    background: var(--menu-bg);
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    z-index: 50;
    overflow-y: auto;
    overflow-x: hidden;
    transition: width var(--transition-duration);
}

.pos-sidebar::-webkit-scrollbar {
    width: 4px;
}
.pos-sidebar::-webkit-scrollbar-thumb {
    background: rgba(255,255,255,0.2);
    border-radius: 2px;
}

.pos-main-wrapper {
    flex: 1;
    margin-left: var(--sidebar-width);
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    transition: margin-left var(--transition-duration);
}

.pos-header {
    height: var(--header-height);
    background: var(--header-bg);
    box-shadow: var(--header-shadow);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 24px;
    position: sticky;
    top: 0;
    z-index: 40;
}

.pos-content {
    flex: 1;
    padding: 24px;
    min-height: calc(100vh - var(--header-height) - var(--footer-height));
}

.pos-footer {
    height: var(--footer-height);
    background: var(--footer-bg);
    border-top: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    padding: 0 24px;
    font-size: var(--font-size-sm);
    color: var(--footer-text);
}

/* --- Sidebar Menu --- */
.sidebar-logo {
    height: 56px;
    display: flex;
    align-items: center;
    padding: 0 16px;
    background: var(--menu-dark-bg);
    border-bottom: 1px solid rgba(255,255,255,0.05);
}

.sidebar-logo .logo-icon {
    width: 32px;
    height: 32px;
    background: var(--primary-green);
    border-radius: 6px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-weight: bold;
    font-size: 16px;
    margin-right: 10px;
    flex-shrink: 0;
}

.sidebar-logo .logo-text {
    color: #fff;
    font-size: 15px;
    font-weight: 600;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.sidebar-menu {
    padding: 8px 0;
}

.menu-group {
    margin-bottom: 2px;
}

.menu-parent {
    display: flex;
    align-items: center;
    padding: 10px 24px;
    color: var(--menu-text);
    cursor: pointer;
    transition: all var(--transition-duration);
    font-size: 14px;
    user-select: none;
    position: relative;
}

.menu-parent:hover {
    color: var(--menu-text-active);
    background: var(--menu-item-hover-bg);
}

.menu-parent.active {
    color: var(--menu-text-active);
    background: var(--menu-item-active-bg);
}

.menu-parent .menu-icon {
    width: 20px;
    margin-right: 10px;
    text-align: center;
    font-size: 16px;
    flex-shrink: 0;
}

.menu-parent .menu-title {
    flex: 1;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.menu-parent .menu-arrow {
    font-size: 12px;
    transition: transform var(--transition-duration);
}

.menu-parent.expanded .menu-arrow {
    transform: rotate(90deg);
}

.menu-children {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
    background: rgba(0,0,0,0.15);
}

.menu-children.open {
    max-height: 500px;
}

.menu-child {
    display: block;
    padding: 9px 24px 9px 54px;
    color: var(--menu-text);
    cursor: pointer;
    transition: all var(--transition-duration);
    font-size: 13px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.menu-child:hover {
    color: var(--menu-text-active);
    background: var(--menu-item-hover-bg);
}

.menu-child.active {
    color: var(--menu-text-active);
    background: var(--primary-green);
}

/* --- Header --- */
.header-left {
    display: flex;
    align-items: center;
    gap: 16px;
}

.header-breadcrumb {
    display: flex;
    align-items: center;
    font-size: var(--font-size-sm);
    color: var(--text-tertiary);
}

.header-breadcrumb span {
    margin: 0 6px;
    color: var(--text-disabled);
}

.header-breadcrumb a {
    color: var(--text-secondary);
}

.header-right {
    display: flex;
    align-items: center;
    gap: 16px;
}

.header-action {
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 6px;
    cursor: pointer;
    color: var(--text-secondary);
    transition: all var(--transition-duration);
    position: relative;
    font-size: 18px;
    background: none;
    border: none;
}

.header-action:hover {
    background: var(--body-bg);
    color: var(--text-primary);
}

.header-action .badge {
    position: absolute;
    top: 4px;
    right: 2px;
    min-width: 18px;
    height: 18px;
    background: var(--error-color);
    color: #fff;
    font-size: 11px;
    border-radius: 9px;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0 4px;
    line-height: 1;
}

.header-user {
    display: flex;
    align-items: center;
    gap: 8px;
    cursor: pointer;
    padding: 4px 8px;
    border-radius: 6px;
    transition: background var(--transition-duration);
}

.header-user:hover {
    background: var(--body-bg);
}

.header-user .user-avatar {
    width: 30px;
    height: 30px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary-green), var(--auxiliary-blue));
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-size: 14px;
    font-weight: 600;
}

.header-user .user-name {
    font-size: 14px;
    color: var(--text-primary);
}

/* --- Cards --- */
.pos-card {
    background: var(--card-bg);
    border-radius: var(--card-radius);
    box-shadow: var(--card-shadow);
    overflow: hidden;
}

.pos-card .card-header {
    padding: 16px 20px;
    border-bottom: 1px solid var(--border-color-light);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.pos-card .card-header .card-title {
    font-size: 16px;
    font-weight: 600;
    color: var(--text-primary);
}

.pos-card .card-body {
    padding: 20px;
}

/* --- Stat Cards --- */
.stat-cards {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 16px;
    margin-bottom: 24px;
}

.stat-card {
    background: var(--card-bg);
    border-radius: var(--card-radius);
    box-shadow: var(--card-shadow);
    padding: 20px;
    display: flex;
    align-items: center;
    gap: 16px;
    transition: transform var(--transition-duration), box-shadow var(--transition-duration);
}

.stat-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 16px rgba(0,0,0,0.1);
}

.stat-card .stat-icon {
    width: 52px;
    height: 52px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    flex-shrink: 0;
}

.stat-card .stat-icon.green {
    background: var(--success-bg);
    color: var(--success-color);
}

.stat-card .stat-icon.blue {
    background: var(--info-bg);
    color: var(--info-color);
}

.stat-card .stat-icon.orange {
    background: var(--warning-bg);
    color: var(--warning-color);
}

.stat-card .stat-icon.red {
    background: var(--error-bg);
    color: var(--error-color);
}

.stat-card .stat-info {
    flex: 1;
    min-width: 0;
}

.stat-card .stat-label {
    font-size: 13px;
    color: var(--text-tertiary);
    margin-bottom: 4px;
}

.stat-card .stat-value {
    font-size: 22px;
    font-weight: 700;
    color: var(--text-primary);
    line-height: 1.3;
}

.stat-card .stat-trend {
    font-size: 12px;
    margin-top: 4px;
    display: flex;
    align-items: center;
    gap: 2px;
}

.stat-card .stat-trend.up {
    color: var(--success-color);
}

.stat-card .stat-trend.down {
    color: var(--error-color);
}

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

.pos-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 14px;
}

.pos-table thead th {
    background: #fafafa;
    padding: 12px 16px;
    text-align: left;
    font-weight: 600;
    color: var(--text-primary);
    border-bottom: 1px solid var(--border-color);
    white-space: nowrap;
}

.pos-table tbody td {
    padding: 12px 16px;
    border-bottom: 1px solid var(--border-color-light);
    color: var(--text-secondary);
}

.pos-table tbody tr:hover {
    background: #fafafa;
}

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

/* --- Buttons --- */
.pos-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    padding: 6px 16px;
    border-radius: 4px;
    font-size: 14px;
    cursor: pointer;
    transition: all var(--transition-duration);
    border: 1px solid transparent;
    white-space: nowrap;
    user-select: none;
    line-height: 1.5;
}

.pos-btn-primary {
    background: var(--primary-green);
    color: #fff;
    border-color: var(--primary-green);
}
.pos-btn-primary:hover {
    background: var(--primary-green-hover);
    border-color: var(--primary-green-hover);
}
.pos-btn-primary:active {
    background: var(--primary-green-active);
    border-color: var(--primary-green-active);
}

.pos-btn-secondary {
    background: var(--auxiliary-blue);
    color: #fff;
    border-color: var(--auxiliary-blue);
}
.pos-btn-secondary:hover {
    background: var(--auxiliary-blue-hover);
    border-color: var(--auxiliary-blue-hover);
}
.pos-btn-secondary:active {
    background: var(--auxiliary-blue-active);
    border-color: var(--auxiliary-blue-active);
}

.pos-btn-default {
    background: #fff;
    color: var(--text-primary);
    border-color: var(--border-color);
}
.pos-btn-default:hover {
    color: var(--primary-green);
    border-color: var(--primary-green);
}

.pos-btn-danger {
    background: var(--error-color);
    color: #fff;
    border-color: var(--error-color);
}
.pos-btn-danger:hover {
    background: #ff7875;
    border-color: #ff7875;
}

.pos-btn-sm {
    padding: 2px 10px;
    font-size: 12px;
}

.pos-btn-lg {
    padding: 8px 24px;
    font-size: 16px;
}

.pos-btn[disabled] {
    opacity: 0.6;
    cursor: not-allowed;
}

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

.pos-form-label {
    display: block;
    margin-bottom: 6px;
    font-size: 14px;
    color: var(--text-primary);
    font-weight: 500;
}

.pos-form-label .required {
    color: var(--error-color);
    margin-right: 4px;
}

.pos-input {
    width: 100%;
    height: 36px;
    padding: 0 12px;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    font-size: 14px;
    color: var(--text-primary);
    background: #fff;
    transition: border-color var(--transition-duration), box-shadow var(--transition-duration);
}

.pos-input:hover {
    border-color: var(--primary-green);
}

.pos-input:focus {
    border-color: var(--primary-green);
    box-shadow: 0 0 0 2px rgba(82, 196, 26, 0.15);
}

.pos-input::placeholder {
    color: var(--text-disabled);
}

.pos-input-lg {
    height: 44px;
    padding: 0 16px;
    font-size: 16px;
}

.pos-select {
    width: 100%;
    height: 36px;
    padding: 0 32px 0 12px;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    font-size: 14px;
    color: var(--text-primary);
    background: #fff url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath d='M2.5 4.5L6 8l3.5-3.5' fill='none' stroke='%23bfbfbf' stroke-width='1.5' stroke-linecap='round'/%3E%3C/svg%3E") right 12px center no-repeat;
    appearance: none;
    cursor: pointer;
    transition: border-color var(--transition-duration);
}

.pos-select:focus {
    border-color: var(--primary-green);
    box-shadow: 0 0 0 2px rgba(82, 196, 26, 0.15);
}

.pos-textarea {
    width: 100%;
    min-height: 80px;
    padding: 8px 12px;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    font-size: 14px;
    color: var(--text-primary);
    background: #fff;
    resize: vertical;
    transition: border-color var(--transition-duration), box-shadow var(--transition-duration);
}

.pos-textarea:focus {
    border-color: var(--primary-green);
    box-shadow: 0 0 0 2px rgba(82, 196, 26, 0.15);
}

/* --- Checkbox --- */
.pos-checkbox {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    cursor: pointer;
    font-size: 14px;
    color: var(--text-secondary);
    user-select: none;
}

.pos-checkbox input[type="checkbox"] {
    width: 16px;
    height: 16px;
    accent-color: var(--primary-green);
    cursor: pointer;
}

/* --- Search Bar --- */
.pos-search-bar {
    display: flex;
    align-items: center;
    gap: 12px;
    flex-wrap: wrap;
}

.pos-search-bar .pos-input,
.pos-search-bar .pos-select {
    width: auto;
    min-width: 180px;
}

.pos-search-bar .search-actions {
    display: flex;
    gap: 8px;
}

/* --- Tags / Badges --- */
.pos-tag {
    display: inline-flex;
    align-items: center;
    padding: 2px 10px;
    border-radius: 4px;
    font-size: 12px;
    font-weight: 500;
    line-height: 1.8;
    white-space: nowrap;
}

.pos-tag-success {
    background: var(--success-bg);
    color: var(--success-color);
    border: 1px solid var(--success-border);
}

.pos-tag-warning {
    background: var(--warning-bg);
    color: #d48806;
    border: 1px solid var(--warning-border);
}

.pos-tag-error {
    background: var(--error-bg);
    color: var(--error-color);
    border: 1px solid var(--error-border);
}

.pos-tag-info {
    background: var(--info-bg);
    color: var(--info-color);
    border: 1px solid var(--info-border);
}

.pos-tag-default {
    background: #fafafa;
    color: var(--text-secondary);
    border: 1px solid var(--border-color);
}

/* --- Tabs --- */
.pos-tabs {
    border-bottom: 1px solid var(--border-color);
    display: flex;
    gap: 0;
}

.pos-tab {
    padding: 10px 20px;
    font-size: 14px;
    color: var(--text-secondary);
    cursor: pointer;
    border-bottom: 2px solid transparent;
    transition: all var(--transition-duration);
    background: none;
    border-top: none;
    border-left: none;
    border-right: none;
}

.pos-tab:hover {
    color: var(--primary-green);
}

.pos-tab.active {
    color: var(--primary-green);
    border-bottom-color: var(--primary-green);
    font-weight: 500;
}

/* --- Pagination --- */
.pos-pagination {
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: 8px;
    padding: 16px 0;
    font-size: 14px;
}

.pos-pagination .page-info {
    color: var(--text-tertiary);
    margin-right: 8px;
}

.pos-pagination .page-btn {
    min-width: 32px;
    height: 32px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    background: #fff;
    color: var(--text-primary);
    cursor: pointer;
    font-size: 13px;
    transition: all var(--transition-duration);
    padding: 0 6px;
}

.pos-pagination .page-btn:hover {
    color: var(--primary-green);
    border-color: var(--primary-green);
}

.pos-pagination .page-btn.active {
    background: var(--primary-green);
    color: #fff;
    border-color: var(--primary-green);
}

.pos-pagination .page-btn[disabled] {
    color: var(--text-disabled);
    cursor: not-allowed;
}

/* --- Modal / Dialog --- */
.pos-modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.45);
    z-index: var(--z-modal);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-duration);
}

.pos-modal-overlay.show {
    opacity: 1;
    visibility: visible;
}

.pos-modal {
    background: #fff;
    border-radius: 8px;
    box-shadow: 0 6px 30px rgba(0,0,0,0.15);
    width: 520px;
    max-width: 90vw;
    max-height: 85vh;
    display: flex;
    flex-direction: column;
    transform: translateY(-20px);
    transition: transform var(--transition-duration);
}

.pos-modal-overlay.show .pos-modal {
    transform: translateY(0);
}

.pos-modal .modal-header {
    padding: 16px 24px;
    border-bottom: 1px solid var(--border-color-light);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.pos-modal .modal-title {
    font-size: 16px;
    font-weight: 600;
    color: var(--text-primary);
}

.pos-modal .modal-close {
    width: 28px;
    height: 28px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 4px;
    cursor: pointer;
    color: var(--text-tertiary);
    font-size: 18px;
    background: none;
    border: none;
    transition: all var(--transition-duration);
}

.pos-modal .modal-close:hover {
    background: var(--body-bg);
    color: var(--text-primary);
}

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

.pos-modal .modal-footer {
    padding: 12px 24px;
    border-top: 1px solid var(--border-color-light);
    display: flex;
    justify-content: flex-end;
    gap: 8px;
}

/* --- Status Dot --- */
.status-dot {
    display: inline-block;
    width: 8px;
    height: 8px;
    border-radius: 50%;
    margin-right: 6px;
}

.status-dot.online {
    background: var(--success-color);
    box-shadow: 0 0 4px rgba(82, 196, 26, 0.5);
}

.status-dot.offline {
    background: var(--text-disabled);
}

.status-dot.warning {
    background: var(--warning-color);
}

.status-dot.error {
    background: var(--error-color);
}

/* --- Charts (CSS Simulated) --- */
.chart-container {
    position: relative;
    width: 100%;
    padding: 16px 0;
}

/* Bar Chart */
.bar-chart {
    display: flex;
    align-items: flex-end;
    gap: 12px;
    height: 200px;
    padding: 0 8px;
}

.bar-item {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    height: 100%;
    justify-content: flex-end;
}

.bar-item .bar {
    width: 100%;
    max-width: 48px;
    border-radius: 4px 4px 0 0;
    transition: height 0.6s ease;
    position: relative;
}

.bar-item .bar.green {
    background: linear-gradient(180deg, var(--primary-green-hover), var(--primary-green));
}

.bar-item .bar.blue {
    background: linear-gradient(180deg, var(--auxiliary-blue-hover), var(--auxiliary-blue));
}

.bar-item .bar-label {
    font-size: 12px;
    color: var(--text-tertiary);
    text-align: center;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    max-width: 60px;
}

.bar-item .bar-value {
    font-size: 12px;
    color: var(--text-secondary);
    font-weight: 600;
}

/* Pie Chart (CSS) */
.pie-chart-wrapper {
    display: flex;
    align-items: center;
    gap: 24px;
    justify-content: center;
    padding: 16px 0;
}

.pie-chart {
    width: 160px;
    height: 160px;
    border-radius: 50%;
    position: relative;
}

.pie-legend {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.pie-legend-item {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 13px;
    color: var(--text-secondary);
}

.pie-legend-item .legend-dot {
    width: 12px;
    height: 12px;
    border-radius: 3px;
    flex-shrink: 0;
}

.pie-legend-item .legend-value {
    font-weight: 600;
    color: var(--text-primary);
    margin-left: 4px;
}

/* --- Progress Bar --- */
.pos-progress {
    width: 100%;
    height: 8px;
    background: var(--border-color-light);
    border-radius: 4px;
    overflow: hidden;
}

.pos-progress .progress-bar {
    height: 100%;
    border-radius: 4px;
    transition: width 0.6s ease;
}

.pos-progress .progress-bar.green {
    background: var(--primary-green);
}

.pos-progress .progress-bar.blue {
    background: var(--auxiliary-blue);
}

.pos-progress .progress-bar.orange {
    background: var(--warning-color);
}

.pos-progress .progress-bar.red {
    background: var(--error-color);
}

/* --- Empty State --- */
.pos-empty {
    text-align: center;
    padding: 48px 24px;
    color: var(--text-tertiary);
}

.pos-empty .empty-icon {
    font-size: 48px;
    margin-bottom: 16px;
    opacity: 0.5;
}

.pos-empty .empty-text {
    font-size: 14px;
}

/* --- Toast / Notification --- */
.pos-toast {
    position: fixed;
    top: 24px;
    right: 24px;
    z-index: var(--z-toast);
    min-width: 300px;
    padding: 14px 20px;
    border-radius: 6px;
    box-shadow: 0 4px 16px rgba(0,0,0,0.12);
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 14px;
    transform: translateX(120%);
    transition: transform var(--transition-duration);
}

.pos-toast.show {
    transform: translateX(0);
}

.pos-toast.toast-success {
    background: #fff;
    border-left: 4px solid var(--success-color);
}

.pos-toast.toast-error {
    background: #fff;
    border-left: 4px solid var(--error-color);
}

.pos-toast.toast-warning {
    background: #fff;
    border-left: 4px solid var(--warning-color);
}

.pos-toast.toast-info {
    background: #fff;
    border-left: 4px solid var(--info-color);
}

/* --- Utility Classes --- */
.text-success { color: var(--success-color) !important; }
.text-warning { color: var(--warning-color) !important; }
.text-error { color: var(--error-color) !important; }
.text-info { color: var(--info-color) !important; }
.text-muted { color: var(--text-tertiary) !important; }
.text-center { text-align: center !important; }
.text-right { text-align: right !important; }

.mt-8 { margin-top: 8px; }
.mt-16 { margin-top: 16px; }
.mt-24 { margin-top: 24px; }
.mb-8 { margin-bottom: 8px; }
.mb-16 { margin-bottom: 16px; }
.mb-24 { margin-bottom: 24px; }
.ml-8 { margin-left: 8px; }
.mr-8 { margin-right: 8px; }

.flex { display: flex; }
.flex-center { display: flex; align-items: center; justify-content: center; }
.flex-between { display: flex; align-items: center; justify-content: space-between; }
.gap-8 { gap: 8px; }
.gap-12 { gap: 12px; }
.gap-16 { gap: 16px; }
.gap-24 { gap: 24px; }

.truncate {
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

/* --- Grid Layouts --- */
.grid-2 {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
}

.grid-3 {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
}

/* --- Responsive Design --- */
@media screen and (max-width: 1200px) {
    .stat-cards {
        grid-template-columns: repeat(2, 1fr);
    }
    .grid-2 {
        grid-template-columns: 1fr;
    }
}

@media screen and (max-width: 768px) {
    .pos-sidebar {
        transform: translateX(-100%);
    }
    .pos-sidebar.mobile-open {
        transform: translateX(0);
    }
    .pos-main-wrapper {
        margin-left: 0;
    }
    .stat-cards {
        grid-template-columns: 1fr;
    }
    .pos-content {
        padding: 16px;
    }
    .pos-header {
        padding: 0 16px;
    }
    .pos-search-bar {
        flex-direction: column;
        align-items: stretch;
    }
    .pos-search-bar .pos-input,
    .pos-search-bar .pos-select {
        width: 100%;
    }
    .bar-chart {
        gap: 6px;
    }
    .pie-chart-wrapper {
        flex-direction: column;
    }
    .pos-pagination {
        justify-content: center;
    }
}

@media screen and (max-width: 480px) {
    .pos-btn {
        padding: 4px 12px;
        font-size: 13px;
    }
    .stat-card .stat-value {
        font-size: 18px;
    }
    .pos-table {
        font-size: 12px;
    }
    .pos-table thead th,
    .pos-table tbody td {
        padding: 8px 10px;
    }
}

/* --- Scrollbar --- */
::-webkit-scrollbar {
    width: 6px;
    height: 6px;
}
::-webkit-scrollbar-track {
    background: transparent;
}
::-webkit-scrollbar-thumb {
    background: #d9d9d9;
    border-radius: 3px;
}
::-webkit-scrollbar-thumb:hover {
    background: #bfbfbf;
}

/* --- Animation --- */
@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes slideUp {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

.fade-in {
    animation: fadeIn 0.3s ease;
}

.slide-up {
    animation: slideUp 0.4s ease;
}