:root {
    --bg: #f5f6f8;
    --panel: #ffffff;
    --text: #1d2733;
    --muted: #667085;
    --line: #d7dce5;
    --accent: #0f766e;
    --accent-bg: #e9fbf8;
    --warn: #b42318;
    --warn-bg: #fef2f2;
    --primary: #2563eb;
    --primary-bg: #eff6ff;
    --class: #1d4ed8;
    --class-bg: #eff6ff;
    --category: #0e7490;
    --category-bg: #ecfeff;
    --series: #7e22ce;
    --series-bg: #f5f3ff;
    --model: #be123c;
    --model-bg: #fff1f2;
    --size: #15803d;
    --size-bg: #f0fdf4;
    --fabric: #b45309;
    --fabric-bg: #fff7ed;
    --shape: #475569;
    --shape-bg: #f8fafc;
    --personnel: #0f766e;
    --personnel-bg: #e9fbf8;
    --platform: #4338ca;
    --platform-bg: #eef2ff;
    --store: #059669;
    --store-bg: #ecfdf5;
    --radius: 10px;
    --shadow: 0 4px 16px rgba(29, 54, 38, 0.08);
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.5;
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

/* Flash */
.flash {
    padding: 12px 16px;
    border-radius: var(--radius);
    margin-bottom: 16px;
}
.flash-success { background: var(--accent-bg); color: var(--accent); }
.flash-error { background: var(--warn-bg); color: var(--warn); }
.flash-info { background: var(--primary-bg); color: var(--primary); }

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    padding: 8px 16px;
    border: 1px solid transparent;
    border-radius: 6px;
    font-size: 14px;
    cursor: pointer;
    background: var(--panel);
    color: var(--text);
    border-color: var(--line);
}
.btn:hover { background: #f8fafc; }
.btn-primary { background: var(--accent); color: #fff; border-color: var(--accent); }
.btn-primary:hover { background: #115e59; }
.btn-danger { background: var(--warn); color: #fff; border-color: var(--warn); }
.btn-sm { padding: 4px 10px; font-size: 13px; }
.btn.is-disabled, .btn:disabled { opacity: 0.5; cursor: not-allowed; }

/* Forms */
label { display: block; margin-bottom: 12px; }
label span { display: block; margin-bottom: 4px; font-size: 14px; color: var(--muted); }
input[type="text"], input[type="password"], input[type="number"], input[type="date"], select, textarea {
    width: 100%;
    padding: 8px 12px;
    border: 1px solid var(--line);
    border-radius: 6px;
    font-size: 14px;
    background: var(--panel);
}
input:focus, select:focus, textarea:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 3px rgba(15, 118, 110, 0.1);
}

/* Nav */
.main-nav {
    position: sticky;
    top: 0;
    z-index: 100;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    padding: 0 24px;
    height: 56px;
    background: var(--panel);
    border-bottom: 1px solid var(--line);
    box-shadow: var(--shadow);
}
.nav-brand a { font-weight: 700; font-size: 18px; color: var(--text); }
.nav-menu { display: flex; gap: 8px; list-style: none; margin: 0; padding: 0; }
.nav-menu a {
    display: block;
    padding: 8px 12px;
    border-radius: 6px;
    color: var(--muted);
    font-size: 14px;
}
.nav-menu a:hover { background: var(--bg); color: var(--text); text-decoration: none; }
.nav-user { display: flex; align-items: center; gap: 12px; font-size: 14px; color: var(--muted); }

.page-content { padding: 24px; max-width: 1600px; margin: 0 auto; }

/* Login */
.login-wrapper {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 24px;
}
.login-card {
    width: 100%;
    max-width: 400px;
    background: var(--panel);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 32px;
}
.login-card h1 { margin: 0 0 4px; font-size: 22px; }
.login-subtitle { margin: 0 0 24px; color: var(--muted); }
.login-form button { width: 100%; margin-top: 8px; }
.login-hint { margin: 16px 0 0; font-size: 13px; color: var(--muted); }

/* Page header */
.page-header { margin-bottom: 20px; }
.page-header h1 { margin: 0 0 6px; font-size: 22px; }
.page-header p { margin: 0; color: var(--muted); font-size: 14px; }

/* Cards */
.cards {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
    gap: 12px;
    margin-bottom: 16px;
}
.card {
    background: var(--panel);
    border-radius: var(--radius);
    padding: 16px;
    box-shadow: var(--shadow);
}
.card small { display: block; color: var(--muted); font-size: 12px; margin-bottom: 4px; }
.card strong { display: block; font-size: 24px; color: var(--accent); }

/* Searchbar */
.searchbar {
    display: flex;
    gap: 8px;
    margin-bottom: 16px;
}
.searchbar input {
    flex: 1;
    max-width: 480px;
}

/* Store match summary */
.store-match-summary {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 8px;
    margin-bottom: 16px;
    padding: 12px;
    background: var(--panel);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
}
.store-match-summary-title {
    font-weight: 600;
    font-size: 14px;
    margin-right: 8px;
}
.store-match-chip {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 6px 12px;
    border-radius: 20px;
    border: 1px solid var(--line);
    background: var(--panel);
    cursor: pointer;
    font-size: 13px;
}
.store-match-chip:hover { background: #f8fafc; }
.store-match-chip.active { background: var(--accent-bg); border-color: var(--accent); color: var(--accent); }
.store-match-count { font-weight: 700; }

/* Range summary */
.range-summary {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 8px;
    margin-bottom: 16px;
}
.range-summary-title {
    font-weight: 600;
    font-size: 14px;
    margin-right: 8px;
}
.range-chip {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 6px 12px;
    border-radius: 20px;
    border: 1px solid #dcfce7;
    background: #f0fdf4;
    color: #15803d;
    cursor: pointer;
    font-size: 13px;
}
.range-chip:hover { background: #dcfce7; }
.range-chip.active { background: #15803d; color: #fff; border-color: #15803d; }
.range-chip strong { font-weight: 700; }

/* Filters */
.filter-panel {
    display: grid;
    grid-template-columns: 1fr auto;
    gap: 16px;
    margin-bottom: 16px;
    align-items: start;
}
.filter-left {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
    gap: 12px;
}
.filter-group {
    background: var(--panel);
    border-radius: var(--radius);
    padding: 12px;
    box-shadow: var(--shadow);
    max-height: 280px;
    overflow-y: auto;
}
.filter-group h4 { margin: 0 0 10px; font-size: 14px; color: var(--text); }
.filter-group h4 small { color: var(--muted); font-weight: normal; }
.filter-chips { display: flex; flex-wrap: wrap; gap: 6px; }
.filter-chip {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 4px 10px;
    border-radius: 16px;
    border: 1px solid var(--line);
    background: #f8fafc;
    cursor: pointer;
    font-size: 12px;
    max-width: 100%;
}
.filter-chip:hover { background: #f1f5f9; }
.filter-chip.active { background: var(--accent); color: #fff; border-color: var(--accent); }
.filter-name { white-space: nowrap; overflow: hidden; text-overflow: ellipsis; max-width: 120px; }
.filter-count { font-weight: 600; opacity: 0.8; }
.filter-toggle {
    padding: 4px 10px;
    border-radius: 16px;
    border: 1px dashed var(--line);
    background: transparent;
    cursor: pointer;
    font-size: 12px;
    color: var(--muted);
}
.filter-toggle:hover { color: var(--accent); border-color: var(--accent); }

.side-action-buttons { display: flex; flex-direction: column; gap: 8px; }

/* Toolbar */
.export-toolbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    margin-bottom: 12px;
    flex-wrap: wrap;
}
.export-actions { display: flex; gap: 8px; flex-wrap: wrap; }
.export-status { font-size: 14px; }
.zero-stock-toggle { display: inline-flex; align-items: center; gap: 6px; cursor: pointer; font-size: 14px; }

/* Tables */
.table-wrap, .table-scroll {
    background: var(--panel);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    overflow: auto;
    max-height: 70vh;
}
table {
    width: 100%;
    border-collapse: collapse;
    font-size: 13px;
    min-width: 1400px;
}
th, td {
    padding: 10px 12px;
    border-bottom: 1px solid var(--line);
    text-align: left;
    white-space: nowrap;
}
th {
    position: sticky;
    top: 0;
    background: #f8fafc;
    font-weight: 600;
    z-index: 10;
}
tbody tr:hover { background: #f8fafc; }
td.num { text-align: right; font-variant-numeric: tabular-nums; }
.text-wrap { white-space: normal; min-width: 160px; max-width: 280px; }

/* Status badges */
.status-badge {
    display: inline-block;
    padding: 2px 8px;
    border-radius: 4px;
    font-size: 12px;
}
.status-matched { background: #dcfce7; color: #15803d; }
.status-store-only { background: #ffedd5; color: #c2410c; }
.status-inventory-only { background: #e0e7ff; color: #4338ca; }

/* Pagination */
.pager {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-top: 16px;
    justify-content: center;
}
.page-text { font-size: 14px; color: var(--muted); }

/* Upload */
.upload-zone {
    border: 2px dashed var(--line);
    border-radius: var(--radius);
    padding: 48px 24px;
    text-align: center;
    background: var(--panel);
    cursor: pointer;
    transition: border-color 0.2s;
}
.upload-zone:hover, .upload-zone.dragover { border-color: var(--accent); background: var(--accent-bg); }
.upload-zone input { display: none; }
.upload-history { margin-top: 24px; }

/* Admin */
.admin-grid {
    display: grid;
    grid-template-columns: 280px 1fr;
    gap: 24px;
}
.admin-form {
    background: var(--panel);
    border-radius: var(--radius);
    padding: 20px;
    box-shadow: var(--shadow);
}
.admin-list {
    background: var(--panel);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    overflow: auto;
}
.admin-list table { min-width: unset; }

/* Modal */
.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.45);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 200;
    padding: 24px;
}
.modal-overlay.open { display: flex; }
.modal {
    background: var(--panel);
    border-radius: var(--radius);
    width: 90%;
    max-width: 900px;
    max-height: 90vh;
    overflow: auto;
    padding: 24px;
    box-shadow: 0 24px 60px rgba(0,0,0,0.2);
}
.modal-wide { max-width: 1200px; }
.modal-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 16px; }
.modal-header h2 { margin: 0; }
.modal-close { background: none; border: none; font-size: 24px; cursor: pointer; }
#trendChartWrap { height: 320px; position: relative; }

/* Misc */
.tag {
    display: inline-block;
    padding: 2px 8px;
    border-radius: 4px;
    font-size: 12px;
    background: var(--accent-bg);
    color: var(--accent);
}
.text-right { text-align: right; }
.text-muted { color: var(--muted); }
.mt-2 { margin-top: 16px; }
.mb-2 { margin-bottom: 16px; }
/* Append pagination styles */
.pagination {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    align-items: center;
}
.pagination .btn {
    min-width: 32px;
}