/* ============================================
   ERP数据管理平台 - 全局样式
   配色：蓝色系
   ============================================ */

/* ---------- CSS Variables ---------- */
:root {
    /* 主色 - 蓝色渐变系 */
    --primary: #535FE8;
    --primary-light: #7681F8;
    --primary-dark: #3A44B0;
    --primary-50: #f0f1fe;
    --primary-100: #e0e2fd;
    --primary-200: #c2c7fb;
    --primary-gradient: #535FE8;

    /* 功能色 */
    --success: #10b981;
    --success-bg: #ecfdf5;
    --warning: #f59e0b;
    --warning-bg: #fffbeb;
    --danger: #ef4444;
    --danger-bg: #fef2f2;
    --info: #3b82f6;
    --info-bg: #eff6ff;

    /* 中性色 */
    --gray-50: #f9fafb;
    --gray-100: #f3f4f6;
    --gray-200: #e5e7eb;
    --gray-300: #d1d5db;
    --gray-400: #9ca3af;
    --gray-500: #6b7280;
    --gray-600: #4b5563;
    --gray-700: #374151;
    --gray-800: #1f2937;
    --gray-900: #111827;

    /* 布局 */
    --sidebar-width: 240px;
    --sidebar-collapsed: 64px;
    --header-height: 60px;
    --radius: 12px;
    --radius-sm: 8px;
    --radius-lg: 16px;
    --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
    --shadow: 0 1px 3px rgba(0,0,0,0.1), 0 1px 2px rgba(0,0,0,0.06);
    --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.1), 0 2px 4px -1px rgba(0,0,0,0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.1), 0 4px 6px -2px rgba(0,0,0,0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0,0,0,0.1), 0 10px 10px -5px rgba(0,0,0,0.04);
    --transition: all 0.2s ease;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
    background: var(--gray-50);
    color: var(--gray-800);
    line-height: 1.6;
    overflow: hidden;
    height: 100vh;
}

a { text-decoration: none; color: inherit; }
button { cursor: pointer; border: none; background: none; font: inherit; }
input, select, textarea { font: inherit; }

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

/* ---------- Sidebar ---------- */
.sidebar {
    width: var(--sidebar-width);
    background: #fff;
    border-right: 1px solid var(--gray-200);
    display: flex;
    flex-direction: column;
    transition: width 0.3s ease;
    position: relative;
    z-index: 100;
}

.sidebar-header {
    padding: 20px;
    display: flex;
    align-items: center;
    gap: 12px;
    border-bottom: 1px solid var(--gray-100);
}

.sidebar-logo {
    width: 36px;
    height: 36px;
    background: var(--primary-gradient);
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-weight: 700;
    font-size: 14px;
    flex-shrink: 0;
}

.sidebar-title {
    font-size: 16px;
    font-weight: 700;
    color: var(--gray-900);
    white-space: nowrap;
}

.sidebar-nav {
    flex: 1;
    overflow-y: auto;
    padding: 12px 8px;
}

.nav-section {
    margin-bottom: 8px;
}

.nav-section-title {
    font-size: 11px;
    font-weight: 600;
    color: var(--gray-400);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    padding: 8px 12px 4px;
}

.nav-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 12px;
    border-radius: var(--radius-sm);
    color: var(--gray-600);
    font-size: 14px;
    font-weight: 500;
    transition: var(--transition);
    cursor: pointer;
    margin-bottom: 2px;
}

.nav-item:hover {
    background: var(--primary-50);
    color: var(--primary);
}

.nav-item.active {
    background: var(--primary);
    color: #fff;
    box-shadow: 0 2px 8px rgba(124, 58, 237, 0.3);
}

.nav-item .icon {
    width: 20px;
    height: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.nav-item .badge {
    margin-left: auto;
    background: var(--danger);
    color: #fff;
    font-size: 11px;
    font-weight: 600;
    padding: 1px 6px;
    border-radius: 10px;
}

/* ---------- Main Content ---------- */
.main-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

/* ---------- Header ---------- */
.header {
    height: var(--header-height);
    background: #fff;
    border-bottom: 1px solid var(--gray-200);
    display: flex;
    align-items: center;
    padding: 0 24px;
    gap: 16px;
    flex-shrink: 0;
}

.header-title {
    font-size: 18px;
    font-weight: 700;
    color: var(--gray-900);
}

.header-search {
    flex: 1;
    max-width: 400px;
    margin-left: auto;
    position: relative;
}

.header-search input {
    width: 100%;
    height: 38px;
    border: 1px solid var(--gray-200);
    border-radius: 20px;
    padding: 0 16px 0 38px;
    background: var(--gray-50);
    color: var(--gray-700);
    transition: var(--transition);
    font-size: 14px;
}

.header-search input:focus {
    outline: none;
    border-color: var(--primary-light);
    background: #fff;
    box-shadow: 0 0 0 3px rgba(124, 58, 237, 0.1);
}

.header-search .search-icon {
    position: absolute;
    left: 12px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--gray-400);
}

.header-actions {
    display: flex;
    align-items: center;
    gap: 8px;
}

.header-btn {
    width: 38px;
    height: 38px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--gray-500);
    transition: var(--transition);
    position: relative;
}

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

.header-btn .dot {
    position: absolute;
    top: 8px;
    right: 8px;
    width: 8px;
    height: 8px;
    background: var(--danger);
    border-radius: 50%;
    border: 2px solid #fff;
}

.user-avatar {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: var(--primary-gradient);
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-weight: 600;
    font-size: 14px;
    cursor: pointer;
}

/* ---------- Content Area ---------- */
.content-area {
    flex: 1;
    overflow-y: auto;
    padding: 24px;
}

/* ---------- Page Sections ---------- */
.page-section {
    display: none;
}

.page-section.active {
    display: block;
}

/* ---------- Dashboard Cards ---------- */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 20px;
    margin-bottom: 24px;
}

.stat-card {
    background: #fff;
    border-radius: var(--radius);
    padding: 20px 24px;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--gray-100);
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

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

.stat-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
}

.stat-card.purple::before { background: var(--primary-gradient); }
.stat-card.green::before { background: #10b981; }
.stat-card.blue::before { background: #3b82f6; }
.stat-card.orange::before { background: #f59e0b; }

.stat-card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 12px;
}

.stat-card-icon {
    width: 44px;
    height: 44px;
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
}

.stat-card.purple .stat-card-icon { background: var(--primary-100); color: var(--primary); }
.stat-card.green .stat-card-icon { background: var(--success-bg); color: var(--success); }
.stat-card.blue .stat-card-icon { background: var(--info-bg); color: var(--info); }
.stat-card.orange .stat-card-icon { background: var(--warning-bg); color: var(--warning); }

.stat-card-trend {
    font-size: 12px;
    font-weight: 600;
    padding: 2px 8px;
    border-radius: 12px;
}

.stat-card-trend.up { background: var(--success-bg); color: var(--success); }
.stat-card-trend.down { background: var(--danger-bg); color: var(--danger); }

.stat-card-value {
    font-size: 28px;
    font-weight: 800;
    color: var(--gray-900);
    line-height: 1.2;
    margin-bottom: 4px;
}

.stat-card-label {
    font-size: 13px;
    color: var(--gray-500);
}

/* ---------- Card Container ---------- */
.card {
    background: #fff;
    border-radius: var(--radius);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--gray-100);
    overflow: hidden;
}

.card-header {
    padding: 16px 24px;
    border-bottom: 1px solid var(--gray-100);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.card-title {
    font-size: 16px;
    font-weight: 700;
    color: var(--gray-900);
}

.card-body {
    padding: 24px;
}

/* ---------- Toolbar ---------- */
.toolbar {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 20px;
    flex-wrap: wrap;
}

.toolbar-group {
    display: flex;
    align-items: center;
    gap: 8px;
}

/* ---------- Buttons ---------- */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 8px 16px;
    border-radius: var(--radius-sm);
    font-size: 14px;
    font-weight: 500;
    transition: var(--transition);
    white-space: nowrap;
}

.btn-primary {
    background: var(--primary);
    color: #fff;
    box-shadow: 0 2px 4px rgba(124, 58, 237, 0.2);
}

.btn-primary:hover {
    background: var(--primary-dark);
    box-shadow: 0 4px 8px rgba(124, 58, 237, 0.3);
}

.btn-outline {
    border: 1px solid var(--gray-300);
    color: var(--gray-700);
    background: #fff;
}

.btn-outline:hover {
    border-color: var(--primary);
    color: var(--primary);
    background: var(--primary-50);
}

.btn-ghost {
    color: var(--gray-600);
    padding: 6px 10px;
}

.btn-ghost:hover {
    background: var(--gray-100);
    color: var(--gray-800);
}

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

.btn-danger:hover {
    background: #dc2626;
}

.btn-sm {
    padding: 5px 12px;
    font-size: 13px;
}

.btn-icon {
    width: 36px;
    height: 36px;
    padding: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-sm);
}

/* ---------- Form Elements ---------- */
.form-group {
    margin-bottom: 16px;
}

.form-label {
    display: block;
    font-size: 13px;
    font-weight: 600;
    color: var(--gray-700);
    margin-bottom: 6px;
}

.form-input {
    width: 100%;
    height: 40px;
    border: 1px solid var(--gray-300);
    border-radius: var(--radius-sm);
    padding: 0 12px;
    font-size: 14px;
    color: var(--gray-800);
    background: #fff;
    transition: var(--transition);
}

.form-input:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(124, 58, 237, 0.1);
}

.form-input::placeholder {
    color: var(--gray-400);
}

.form-select {
    width: 100%;
    height: 40px;
    border: 1px solid var(--gray-300);
    border-radius: var(--radius-sm);
    padding: 0 12px;
    font-size: 14px;
    color: var(--gray-800);
    background: #fff;
    transition: var(--transition);
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%236b7280' d='M6 8L1 3h10z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 12px center;
    padding-right: 32px;
}

.form-select:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(124, 58, 237, 0.1);
}

.form-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 16px;
}

/* ---------- Table ---------- */
.table-wrapper {
    overflow: auto;
    max-width: 100%;
    max-height: calc(100vh - 320px);
    position: relative;
}

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

.data-table.wide-data-table {
    width: max-content;
    min-width: 100%;
}

.data-table.wide-data-table th,
.data-table.wide-data-table td {
    max-width: 240px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.data-table.wide-data-table th:first-child,
.data-table.wide-data-table td:first-child {
    position: sticky;
    left: 0;
    z-index: 2;
    background: #fff;
}

.data-table.wide-data-table th:first-child {
    background: var(--gray-50);
    z-index: 3;
}

thead th {
    position: sticky;
    top: 0;
    z-index: 5;
    background: var(--gray-50);
    padding: 12px 16px;
    text-align: left;
    font-size: 12px;
    font-weight: 600;
    color: var(--gray-500);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    border-bottom: 1px solid var(--gray-200);
    white-space: nowrap;
    box-shadow: 0 1px 0 var(--gray-200);
}

.data-table.wide-data-table thead th:first-child {
    z-index: 8;
}

.data-table.wide-data-table tbody td:first-child {
    z-index: 4;
}

tbody td {
    padding: 12px 16px;
    font-size: 14px;
    color: var(--gray-700);
    border-bottom: 1px solid var(--gray-100);
    vertical-align: middle;
}

tbody tr {
    transition: var(--transition);
}

tbody tr:hover {
    background: var(--primary-50);
}

/* ---------- Tags / Badges ---------- */
.tag {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 3px 10px;
    border-radius: 12px;
    font-size: 12px;
    font-weight: 600;
}

.tag-success { background: var(--success-bg); color: var(--success); }
.tag-warning { background: var(--warning-bg); color: var(--warning); }
.tag-danger { background: var(--danger-bg); color: var(--danger); }
.tag-info { background: var(--info-bg); color: var(--info); }
.tag-purple { background: var(--primary-100); color: var(--primary); }

/* ---------- Pagination ---------- */
.pagination {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 0;
}

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

.pagination-buttons {
    display: flex;
    align-items: center;
    gap: 4px;
}

.pagination-btn {
    min-width: 34px;
    height: 34px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-sm);
    font-size: 13px;
    font-weight: 500;
    color: var(--gray-600);
    border: 1px solid var(--gray-200);
    background: #fff;
    transition: var(--transition);
    padding: 0 8px;
}

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

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

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

/* ---------- Modal ---------- */
.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(4px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
}

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

.modal {
    background: #fff;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-xl);
    width: 90%;
    max-width: 600px;
    max-height: 85vh;
    display: flex;
    flex-direction: column;
    transform: scale(0.95) translateY(10px);
    transition: all 0.3s ease;
}

.modal-overlay.active .modal {
    transform: scale(1) translateY(0);
}

.modal-header {
    padding: 20px 24px;
    border-bottom: 1px solid var(--gray-100);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.modal-title {
    font-size: 18px;
    font-weight: 700;
    color: var(--gray-900);
}

.modal-close {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--gray-400);
    transition: var(--transition);
}

.modal-close:hover {
    background: var(--gray-100);
    color: var(--gray-600);
}

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

.modal-footer {
    padding: 16px 24px;
    border-top: 1px solid var(--gray-100);
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: 10px;
}

/* ---------- Filter Tags ---------- */
.filter-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 16px;
}

.filter-tag {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 5px 12px;
    background: var(--primary-50);
    color: var(--primary);
    border-radius: 16px;
    font-size: 13px;
    font-weight: 500;
    border: 1px solid var(--primary-200);
}

.filter-tag-remove {
    width: 16px;
    height: 16px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 14px;
    line-height: 1;
    cursor: pointer;
    transition: var(--transition);
}

.filter-tag-remove:hover {
    background: var(--primary-200);
}

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

.empty-state-icon {
    font-size: 48px;
    margin-bottom: 16px;
}

.empty-state-text {
    font-size: 15px;
    font-weight: 500;
}

/* ---------- Loading Spinner ---------- */
.spinner {
    width: 20px;
    height: 20px;
    border: 2px solid var(--gray-200);
    border-top-color: var(--primary);
    border-radius: 50%;
    animation: spin 0.6s linear infinite;
}

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

.loading-overlay {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 40px;
    gap: 10px;
    color: var(--gray-500);
}

/* ---------- Toast ---------- */
.toast-container {
    position: fixed;
    top: 20px;
    right: 20px;
    z-index: 2000;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.toast {
    padding: 12px 20px;
    border-radius: var(--radius-sm);
    background: #fff;
    box-shadow: var(--shadow-lg);
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 14px;
    font-weight: 500;
    animation: slideIn 0.3s ease;
    border-left: 4px solid;
}

.toast.success { border-color: var(--success); }
.toast.error { border-color: var(--danger); }
.toast.warning { border-color: var(--warning); }

@keyframes slideIn {
    from { transform: translateX(100%); opacity: 0; }
    to { transform: translateX(0); opacity: 1; }
}

/* ---------- Responsive ---------- */
@media (max-width: 768px) {
    .sidebar {
        position: fixed;
        left: -240px;
        top: 0;
        bottom: 0;
        z-index: 200;
    }
    .sidebar.open {
        left: 0;
    }
    .stats-grid {
        grid-template-columns: 1fr;
    }
    .form-row {
        grid-template-columns: 1fr;
    }
}