:root {
    --primary: #4f46e5;
    --primary-dark: #3730a3;
    --accent: #0891b2;
    --success: #059669;
    --warning: #d97706;
    --danger: #dc2626;
    --bg: #f5f7fb;
    --panel: #ffffff;
    --panel-2: #f8fafc;
    --text: #0f172a;
    --muted: #64748b;
    --line: #e2e8f0;
    --shadow: 0 12px 30px rgba(15, 23, 42, .08);
    --sidebar: 270px;
    --radius: 8px;
}

* { box-sizing: border-box; }
html, body { margin: 0; min-height: 100%; font-family: Inter, Segoe UI, Arial, sans-serif; color: var(--text); background: var(--bg); }
a { color: inherit; text-decoration: none; }

.app-shell { min-height: 100vh; display: flex; }
.sidebar { width: var(--sidebar); min-height: 100vh; position: fixed; inset: 0 auto 0 0; z-index: 30; background: var(--panel); border-right: 1px solid var(--line); overflow-y: auto; }
.sidebar-backdrop { display: none; }
.brand-block { height: 74px; display: flex; align-items: center; gap: 12px; padding: 18px 20px; border-bottom: 1px solid var(--line); }
.brand-mark { width: 40px; height: 40px; border-radius: 8px; display: grid; place-items: center; color: #fff; font-weight: 800; background: linear-gradient(135deg, var(--primary), var(--accent)); }
.brand-copy { min-width: 0; }
.brand-name { font-weight: 800; font-size: 18px; }
.brand-name span { color: var(--primary); }
.brand-caption { color: var(--muted); font-size: 12px; margin-top: 2px; }
.icon-button.menu-close { display: none; margin-left: auto; }
.nav { padding: 12px 10px 22px; }
.nav-groups, .nav-group-items { list-style: none; margin: 0; padding: 0; }
.nav-groups { display: grid; gap: 8px; }
.nav-group { border-radius: 8px; }
.nav-group-toggle { width: 100%; min-height: 42px; display: flex; align-items: center; justify-content: space-between; gap: 10px; padding: 10px 12px; border: 0; border-radius: 8px; background: transparent; color: #64748b; font: inherit; font-size: 12px; font-weight: 800; letter-spacing: .04em; text-transform: uppercase; cursor: pointer; }
.nav-group-toggle > span { min-width: 0; display: flex; align-items: center; gap: 10px; }
.nav-group-toggle > span i { width: 18px; text-align: center; font-size: 14px; }
.nav-group-toggle:hover { background: var(--panel-2); color: var(--text); }
.nav-group-arrow { flex: 0 0 auto; font-size: 11px; transition: transform .18s ease; }
.nav-group.open .nav-group-arrow { transform: rotate(180deg); }
.nav-group-items { display: none; margin: 3px 0 4px 20px; padding: 4px 0 4px 8px; border-left: 1px solid var(--line); }
.nav-group.open .nav-group-items { display: grid; gap: 3px; }
.nav-item { min-height: 38px; display: flex; align-items: center; gap: 12px; padding: 9px 10px; border-radius: 8px; color: #475569; font-size: 14px; font-weight: 600; }
.nav-item i { width: 18px; text-align: center; }
.nav-item:hover { background: var(--panel-2); color: var(--text); }
.nav-item.active { color: #fff; background: linear-gradient(135deg, var(--primary), var(--primary-dark)); box-shadow: 0 8px 18px rgba(79, 70, 229, .25); }
.nav-item.nav-logout { margin-top: 6px; color: #fff; background: #dc2626; border: 1px solid rgba(248, 113, 113, .38); }
.nav-item.nav-logout:hover { color: #0f172a !important; background: #fca5a5; border-color: rgba(248, 113, 113, .82); }

.main { margin-left: var(--sidebar); width: calc(100% - var(--sidebar)); min-height: 100vh; }
.topbar { height: 74px; display: flex; align-items: center; justify-content: space-between; gap: 20px; background: var(--panel); border-bottom: 1px solid var(--line); padding: 0 26px; position: sticky; top: 0; z-index: 10; }
.topbar-left { min-width: 0; display: flex; align-items: center; gap: 12px; }
.topbar-title { min-width: 0; }
.topbar-title h1, .topbar-title p { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.topbar h1 { margin: 0; font-size: 22px; line-height: 1.15; }
.topbar p { margin: 4px 0 0; color: var(--muted); font-size: 13px; }
.content { padding: 24px; }
.user-block { display: flex; align-items: center; gap: 10px; }
.user-avatar { width: 38px; height: 38px; border-radius: 999px; display: grid; place-items: center; color: #fff; background: linear-gradient(135deg, var(--primary), var(--accent)); font-weight: 800; font-size: 13px; }
.user-meta { display: grid; gap: 2px; font-size: 13px; }
.user-meta a:hover { color: var(--primary); }
.user-meta span { color: var(--muted); font-size: 11px; }
.icon-button { width: 38px; height: 38px; border-radius: 8px; display: inline-grid; place-items: center; color: #475569; background: var(--panel-2); border: 1px solid var(--line); }
.icon-button:hover { color: var(--primary); border-color: #c7d2fe; }
.menu-toggle { display: none; }
.theme-toggle { flex: 0 0 auto; }
.bottom-nav { display: none; }

.login-page { min-height: 100vh; display: grid; grid-template-columns: minmax(420px, 520px) 1fr; background: #0f172a; }
.login-panel { background: #fff; padding: 56px 52px; display: flex; flex-direction: column; justify-content: center; }
.login-art { position: relative; overflow: hidden; background: radial-gradient(circle at 25% 25%, rgba(8,145,178,.35), transparent 28%), linear-gradient(135deg, #111827, #312e81); color: #fff; padding: 56px; display: flex; flex-direction: column; justify-content: flex-end; }
.login-art h1 { max-width: 680px; font-size: 54px; line-height: 1.02; margin: 0 0 18px; letter-spacing: 0; }
.login-art p { max-width: 620px; color: #cbd5e1; font-size: 18px; line-height: 1.7; margin: 0; }
.login-card h2 { margin: 0 0 8px; font-size: 28px; }
.login-card .hint { color: var(--muted); margin-bottom: 26px; line-height: 1.55; }

.grid { display: grid; gap: 16px; }
.grid.stats { grid-template-columns: repeat(4, minmax(180px, 1fr)); margin-bottom: 22px; }
.stat-card, .card { background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius); box-shadow: 0 1px 2px rgba(15, 23, 42, .04); }
.stat-card { padding: 18px; display: flex; gap: 14px; align-items: flex-start; }
.stat-icon { width: 46px; height: 46px; border-radius: 8px; display: grid; place-items: center; font-size: 18px; background: #eef2ff; color: var(--primary); }
.stat-card:nth-child(2) .stat-icon { background: #ecfeff; color: var(--accent); }
.stat-card:nth-child(3) .stat-icon { background: #ecfdf5; color: var(--success); }
.stat-card:nth-child(4) .stat-icon { background: #fff7ed; color: var(--warning); }
.stat-label { color: var(--muted); font-size: 12px; font-weight: 700; text-transform: uppercase; letter-spacing: .04em; }
.stat-value { font-size: 24px; font-weight: 800; margin-top: 4px; }
.card { padding: 20px; }
.card-header { display: flex; align-items: center; justify-content: space-between; gap: 12px; margin-bottom: 16px; }
.card-title { margin: 0; font-size: 16px; }
.toolbar { display: flex; flex-wrap: wrap; gap: 10px; align-items: center; margin-bottom: 16px; }
.toolbar .grow { flex: 1; }

.form-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 16px; }
.form-grid.three { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.form-group { display: grid; gap: 6px; margin-bottom: 14px; }
.form-label { color: #475569; font-size: 13px; font-weight: 700; }
.form-control, input[type=text], input[type=password], input[type=number], select, textarea { width: 100%; min-height: 40px; padding: 9px 12px; border: 1px solid var(--line); border-radius: 8px; background: #fff; color: var(--text); font: inherit; }
textarea { min-height: 88px; resize: vertical; }
.form-control:focus, input:focus, select:focus, textarea:focus { outline: none; border-color: var(--primary); box-shadow: 0 0 0 3px rgba(79, 70, 229, .12); }
.toggle-line { min-height: 40px; display: flex; align-items: center; gap: 10px; color: #475569; font-weight: 700; }
.toggle-line input { width: 18px; height: 18px; }

.btn { min-height: 40px; display: inline-flex; align-items: center; justify-content: center; gap: 8px; padding: 9px 16px; border: 1px solid transparent; border-radius: 8px; font-weight: 700; font-size: 14px; cursor: pointer; }
.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-dark); }
.btn-secondary { background: var(--panel-2); color: var(--text); border-color: var(--line); }
.btn-danger { background: var(--danger); color: #fff; }
.btn-sm { min-height: 32px; padding: 6px 10px; font-size: 12px; }
.actions { display: flex; gap: 8px; flex-wrap: wrap; }

.table-wrap { width: 100%; overflow-x: auto; border: 1px solid var(--line); border-radius: 8px; }
.data-table { width: 100%; border-collapse: collapse; background: #fff; }
.data-table th, .data-table td { padding: 12px 14px; border-bottom: 1px solid var(--line); text-align: left; vertical-align: middle; font-size: 14px; }
.data-table th { color: #64748b; font-size: 12px; text-transform: uppercase; letter-spacing: .04em; background: #f8fafc; }
.data-table tr:last-child td { border-bottom: 0; }
.data-table tr:hover td { background: #fbfdff; }
.text-right { text-align: right !important; }
.text-center { text-align: center !important; }
.muted { color: var(--muted); }
.badge { display: inline-flex; align-items: center; min-height: 24px; padding: 3px 10px; border-radius: 999px; font-size: 12px; font-weight: 700; background: #f1f5f9; color: #475569; }
.badge.success { background: #ecfdf5; color: var(--success); }
.badge.warning { background: #fff7ed; color: var(--warning); }
.badge.danger { background: #fef2f2; color: var(--danger); }
.badge.info { background: #eef2ff; color: var(--primary); }
.message { padding: 12px 14px; border-radius: 8px; margin-bottom: 16px; border: 1px solid var(--line); background: #f8fafc; color: #475569; }
.message.error { background: #fef2f2; border-color: #fecaca; color: #991b1b; }
.message.success { background: #ecfdf5; border-color: #bbf7d0; color: #065f46; }
.empty { padding: 34px 20px; text-align: center; color: var(--muted); }

.pos-layout { display: grid; grid-template-columns: minmax(0, 1fr) 420px; gap: 18px; align-items: start; }
.pos-products { display: grid; grid-template-columns: repeat(auto-fill, minmax(180px, 1fr)); gap: 12px; }
.pos-product { border: 1px solid var(--line); border-radius: 8px; background: #fff; padding: 14px; display: grid; gap: 8px; min-height: 150px; }
.pos-product strong { line-height: 1.25; }
.pos-product .price { font-size: 18px; font-weight: 800; color: var(--primary); }
.pos-product .stock { color: var(--muted); font-size: 12px; }
.pos-cart-total { display: grid; gap: 8px; margin-top: 16px; padding: 14px; border-radius: 8px; background: var(--panel-2); }
.total-row { display: flex; justify-content: space-between; gap: 12px; }
.total-row.grand { padding-top: 10px; border-top: 1px solid var(--line); font-size: 20px; font-weight: 800; }
.payment-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 10px; margin-top: 14px; }
.payment-grid .btn { width: 100%; }
.compact-table th, .compact-table td { padding: 9px 10px; font-size: 13px; }
.quick-action-grid { display: grid; grid-template-columns: repeat(6, minmax(120px, 1fr)); gap: 12px; }
.quick-action { min-height: 104px; border: 1px solid var(--line); border-radius: 8px; background: var(--panel-2); padding: 14px; display: grid; align-content: start; gap: 8px; }
.quick-action:hover { border-color: #c7d2fe; background: #fff; box-shadow: 0 8px 18px rgba(15, 23, 42, .06); }
.quick-action i { width: 38px; height: 38px; border-radius: 8px; display: grid; place-items: center; background: #eef2ff; color: var(--primary); font-size: 16px; }
.quick-action span { font-weight: 800; line-height: 1.25; }
.quick-action small { color: var(--muted); line-height: 1.35; }

.barcode-layout { display: grid; grid-template-columns: minmax(340px, 460px) minmax(0, 1fr); gap: 18px; align-items: start; }
.barcode-controls { display: grid; gap: 16px; }
.barcode-product-table { max-height: 430px; overflow: auto; }
.barcode-copy-input { width: 76px !important; min-height: 34px !important; padding: 6px 8px !important; }
.barcode-spec-row { display: grid; grid-template-columns: repeat(4, minmax(130px, 1fr)); gap: 10px; margin-bottom: 14px; }
.barcode-spec-row div { border: 1px solid var(--line); border-radius: 8px; background: var(--panel-2); padding: 10px 12px; display: grid; gap: 3px; }
.barcode-spec-row strong { font-size: 11px; color: var(--muted); text-transform: uppercase; letter-spacing: .04em; }
.barcode-spec-row span { font-size: 13px; font-weight: 800; color: var(--text); }
.barcode-preview-shell { overflow: auto; border: 1px solid var(--line); border-radius: 8px; background: #eef2f7; padding: 18px; }
.barcode-empty-preview i { display: block; font-size: 40px; margin-bottom: 10px; color: #cbd5e1; }
.barcode-page { width: 210mm; min-width: 210mm; height: 297mm; margin: 0 auto 18px; padding: 12mm 5mm; background: #fff; display: grid; grid-template-columns: repeat(5, 40mm); grid-template-rows: repeat(13, 21mm); box-shadow: var(--shadow); }
.barcode-sticker { width: 40mm; height: 21mm; padding: 1.2mm 1.5mm; border: 1px dashed #cbd5e1; color: #000; background: #fff; overflow: hidden; display: flex; flex-direction: column; justify-content: space-between; page-break-inside: avoid; }
.barcode-sticker-empty { border-color: transparent; }
.barcode-sticker-company { height: 3.1mm; font-size: 6.2pt; line-height: 1; font-weight: 800; text-transform: uppercase; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; border-bottom: .3mm solid #111; padding-bottom: .7mm; }
.barcode-sticker-product { min-height: 4.6mm; max-height: 4.6mm; margin-top: .7mm; font-size: 6.5pt; line-height: 1.15; font-weight: 700; overflow: hidden; }
.barcode-svg-wrap { height: 6.5mm; display: flex; align-items: center; justify-content: center; margin: .3mm 0; }
.barcode-svg { width: 100%; height: 6.1mm; fill: #000; display: block; }
.barcode-sticker-footer { display: flex; justify-content: space-between; align-items: flex-end; gap: 2mm; border-top: .3mm solid #111; padding-top: .5mm; }
.barcode-sticker-code { min-width: 0; max-width: 22mm; font: 5.5pt "Courier New", monospace; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.barcode-sticker-price { font-size: 7.2pt; line-height: 1; font-weight: 900; text-align: right; white-space: nowrap; }
.barcode-sticker-price span { display: block; font-size: 4.8pt; font-weight: 800; }

.settings-layout { display: grid; grid-template-columns: minmax(0, 1.25fr) minmax(320px, .75fr); gap: 18px; align-items: start; }
.business-preview { border: 1px solid var(--line); border-radius: 8px; background: #fff; padding: 20px; }
.business-preview-logo { width: 48px; height: 48px; border-radius: 8px; display: grid; place-items: center; color: #fff; background: linear-gradient(135deg, var(--primary), var(--accent)); font-weight: 900; margin-bottom: 14px; }
.business-preview h3 { margin: 0 0 8px; font-size: 20px; }
.business-preview p { margin: 0 0 16px; color: var(--muted); line-height: 1.55; }
.business-preview-grid { display: grid; gap: 10px; }
.business-preview-grid div { border-top: 1px solid var(--line); padding-top: 10px; display: grid; gap: 3px; }
.business-preview-grid span { color: var(--muted); font-size: 11px; text-transform: uppercase; letter-spacing: .04em; font-weight: 800; }
.business-preview-grid strong { font-size: 13px; overflow-wrap: anywhere; }
.profile-layout { display: grid; grid-template-columns: minmax(0, 1.3fr) minmax(300px, .7fr); gap: 18px; align-items: start; }
.profile-summary { display: grid; gap: 10px; }
.profile-summary-avatar { width: 62px; height: 62px; border-radius: 999px; display: grid; place-items: center; color: #fff; background: linear-gradient(135deg, var(--primary), var(--accent)); font-size: 20px; font-weight: 900; }
.profile-summary h2 { margin: 4px 0 0; font-size: 22px; }
.profile-summary p { margin: 0 0 10px; color: var(--muted); overflow-wrap: anywhere; }
.profile-summary-grid { display: grid; gap: 10px; }
.profile-summary-grid div { border-top: 1px solid var(--line); padding-top: 10px; display: grid; gap: 3px; }
.profile-summary-grid span { color: var(--muted); font-size: 11px; text-transform: uppercase; letter-spacing: .04em; font-weight: 800; }
.profile-summary-grid strong { font-size: 13px; overflow-wrap: anywhere; }
.report-controls, .report-output { break-inside: avoid; }

@media print {
    .sidebar, .topbar, .report-controls .actions, .icon-button { display: none !important; }
    .main { margin-left: 0 !important; width: 100% !important; }
    .content { padding: 12mm !important; }
    .card { box-shadow: none !important; }
}

@media (max-width: 980px) {
    body { padding-bottom: calc(78px + env(safe-area-inset-bottom)); }
    body.sidebar-open { overflow: hidden; }
    .sidebar { display: block; width: min(86vw, 320px); max-width: 320px; height: 100vh; min-height: 100vh; transform: translateX(-105%); transition: transform .22s ease; z-index: 1100; box-shadow: 20px 0 44px rgba(0, 0, 0, .34); }
    body.sidebar-open .sidebar { transform: translateX(0); }
    .sidebar-backdrop { position: fixed; inset: 0; z-index: 1090; padding: 0; border: 0; background: rgba(2, 6, 23, .64); backdrop-filter: blur(2px); }
    body.sidebar-open .sidebar-backdrop { display: block; }
    .menu-toggle, .icon-button.menu-close { display: inline-grid; }
    .app-shell { display: block; }
    .main { width: 100%; margin-left: 0; }
    .grid.stats { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .login-page { grid-template-columns: 1fr; }
    .login-art { display: none; }
    .barcode-layout { grid-template-columns: 1fr; }
    .barcode-spec-row { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .settings-layout { grid-template-columns: 1fr; }
    .profile-layout { grid-template-columns: 1fr; }
    .quick-action-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
    .bottom-nav { position: fixed; left: 0; right: 0; bottom: 0; z-index: 1000; height: 66px; padding: 7px max(10px, env(safe-area-inset-left)) calc(7px + env(safe-area-inset-bottom)) max(10px, env(safe-area-inset-right)); display: grid; grid-template-columns: repeat(5, minmax(0, 1fr)); gap: 6px; background: rgba(255, 255, 255, .96); border-top: 1px solid var(--line); box-shadow: 0 -10px 30px rgba(15, 23, 42, .12); backdrop-filter: blur(14px); }
    .bottom-nav-item { min-width: 0; min-height: 52px; border-radius: 8px; display: grid; place-items: center; align-content: center; gap: 3px; color: #475569; font-size: 11px; font-weight: 800; }
    .bottom-nav-item i { font-size: 17px; }
    .bottom-nav-item span { display: block; max-width: 100%; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
    .bottom-nav-item.active { color: #fff; background: linear-gradient(135deg, var(--primary), var(--primary-dark)); box-shadow: 0 8px 18px rgba(79, 70, 229, .22); }
}

@media (max-width: 640px) {
    .topbar { height: 64px; align-items: center; padding: 10px 12px; flex-direction: row; gap: 10px; }
    .topbar-left { flex: 1 1 auto; gap: 10px; }
    .topbar h1 { font-size: 18px; }
    .topbar p { font-size: 11px; }
    .user-block { flex: 0 0 auto; width: auto; justify-content: flex-end; gap: 8px; }
    .user-meta { display: none; }
    .user-avatar { width: 34px; height: 34px; }
    .icon-button { width: 36px; height: 36px; }
    .content { padding: 14px; }
    .grid.stats, .form-grid, .form-grid.three { grid-template-columns: 1fr; }
    .login-panel { padding: 34px 22px; }
    .pos-layout { grid-template-columns: 1fr; }
    .card { padding: 16px; }
    .card-header { align-items: flex-start; flex-direction: column; }
    .toolbar .grow { flex-basis: 100%; }
    .quick-action-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .quick-action { min-height: 98px; padding: 12px; }
    .stat-card { padding: 15px; }
    .stat-value { font-size: 22px; }
}

@media (max-width: 420px) {
    .topbar p { display: none; }
}

/* Black theme */
:root {
    --primary: #7c3aed;
    --primary-dark: #5b21b6;
    --accent: #06b6d4;
    --success: #22c55e;
    --warning: #f59e0b;
    --danger: #ef4444;
    --bg: #05070b;
    --panel: #0b0f17;
    --panel-2: #111827;
    --text: #f8fafc;
    --muted: #94a3b8;
    --line: #1f2937;
    --shadow: 0 18px 44px rgba(0, 0, 0, .42);
}

html, body { background: radial-gradient(circle at top left, rgba(124, 58, 237, .18), transparent 28%), var(--bg); color: var(--text); }
.sidebar, .topbar, .stat-card, .card { background: rgba(11, 15, 23, .96); border-color: var(--line); box-shadow: 0 1px 0 rgba(255, 255, 255, .03), var(--shadow); }
.sidebar { box-shadow: 14px 0 36px rgba(0, 0, 0, .28); }
.brand-block, .topbar { border-color: var(--line); }
.brand-caption, .topbar p, .muted, .user-meta span { color: var(--muted); }
.nav-section, .nav-group-toggle { color: #94a3b8; }
.nav-group-toggle:hover { background: #111827; color: #fff; }
.nav-group-items { border-color: #253044; }
.nav-item { color: #cbd5e1; }
.nav-item:hover { background: #111827; color: #fff; }
.nav-item.active { background: linear-gradient(135deg, #7c3aed, #0891b2); box-shadow: 0 10px 24px rgba(124, 58, 237, .32); }
.brand-mark, .user-avatar, .business-preview-logo, .profile-summary-avatar { background: linear-gradient(135deg, #7c3aed, #06b6d4); }
.icon-button { color: #cbd5e1; background: #111827; border-color: var(--line); }
.icon-button:hover { color: #fff; border-color: #334155; background: #172033; }
.stat-icon, .quick-action i { background: rgba(124, 58, 237, .18); color: #a78bfa; }
.stat-card:nth-child(2) .stat-icon { background: rgba(6, 182, 212, .15); color: #22d3ee; }
.stat-card:nth-child(3) .stat-icon { background: rgba(34, 197, 94, .14); color: #4ade80; }
.stat-card:nth-child(4) .stat-icon { background: rgba(245, 158, 11, .14); color: #fbbf24; }
.stat-label { color: #9ca3af; }
.stat-value { color: #fff; }
.form-label { color: #d1d5db; }
.form-control, input[type=text], input[type=password], input[type=number], select, textarea { background: #070b12; border-color: #253044; color: var(--text); }
.form-control::placeholder, input::placeholder, textarea::placeholder { color: #64748b; }
.form-control:focus, input:focus, select:focus, textarea:focus { border-color: #7c3aed; box-shadow: 0 0 0 3px rgba(124, 58, 237, .22); }
.btn-secondary { background: #111827; color: #e5e7eb; border-color: #253044; }
.btn-secondary:hover { background: #172033; border-color: #334155; }
.btn-primary { background: #7c3aed; color: #fff; }
.btn-primary:hover { background: #6d28d9; }
.table-wrap { border-color: var(--line); background: #070b12; }
.data-table { background: #070b12; color: var(--text); }
.data-table th { background: #0f172a; color: #94a3b8; border-color: var(--line); }
.data-table td { border-color: var(--line); }
.data-table tr:hover td { background: #0b1220; }
.badge { background: #172033; color: #cbd5e1; }
.badge.success { background: rgba(34, 197, 94, .14); color: #86efac; }
.badge.warning { background: rgba(245, 158, 11, .15); color: #fcd34d; }
.badge.danger { background: rgba(239, 68, 68, .15); color: #fca5a5; }
.badge.info { background: rgba(124, 58, 237, .18); color: #c4b5fd; }
.message { background: #101827; color: #cbd5e1; border-color: #253044; }
.message.error { background: rgba(127, 29, 29, .32); border-color: rgba(248, 113, 113, .38); color: #fecaca; }
.message.success { background: rgba(20, 83, 45, .28); border-color: rgba(74, 222, 128, .34); color: #bbf7d0; }
.empty { color: var(--muted); }
.login-page { background: #05070b; }
.login-panel { background: #0b0f17; color: var(--text); }
.login-art { background: radial-gradient(circle at 25% 20%, rgba(6, 182, 212, .22), transparent 30%), linear-gradient(135deg, #05070b, #111827); }
.login-card .hint, .login-art p { color: var(--muted); }
.toggle-line { color: #d1d5db; }
.pos-product, .quick-action, .business-preview { background: #070b12; border-color: var(--line); }
.quick-action:hover, .pos-product:hover { background: #0b1220; border-color: #334155; }
.pos-cart-total, .barcode-spec-row div { background: #111827; }
.payment-grid .btn { border-color: #253044; }
.business-preview-grid div, .profile-summary-grid div { border-color: var(--line); }
.barcode-preview-shell { background: #111827; border-color: var(--line); }
.bottom-nav { background: rgba(11, 15, 23, .96); border-color: #253044; box-shadow: 0 -14px 34px rgba(0, 0, 0, .45); }
.bottom-nav-item { color: #cbd5e1; }
.bottom-nav-item.active { background: linear-gradient(135deg, #7c3aed, #0891b2); color: #fff; }

/* Keep printable barcode sheets/stickers white in the black theme. */
.barcode-page, .barcode-sticker { background: #fff; color: #000; }

html[data-theme="light"] {
    --primary: #4f46e5;
    --primary-dark: #3730a3;
    --accent: #0891b2;
    --success: #059669;
    --warning: #d97706;
    --danger: #dc2626;
    --bg: #f5f7fb;
    --panel: #ffffff;
    --panel-2: #f8fafc;
    --text: #0f172a;
    --muted: #64748b;
    --line: #e2e8f0;
    --shadow: 0 12px 30px rgba(15, 23, 42, .08);
}

html[data-theme="light"],
html[data-theme="light"] body { background: var(--bg); color: var(--text); }
html[data-theme="light"] .sidebar,
html[data-theme="light"] .topbar,
html[data-theme="light"] .stat-card,
html[data-theme="light"] .card { background: var(--panel); border-color: var(--line); box-shadow: 0 1px 2px rgba(15, 23, 42, .04); }
html[data-theme="light"] .sidebar { box-shadow: none; }
html[data-theme="light"] .brand-block,
html[data-theme="light"] .topbar { border-color: var(--line); }
html[data-theme="light"] .brand-caption,
html[data-theme="light"] .topbar p,
html[data-theme="light"] .muted,
html[data-theme="light"] .user-meta span { color: var(--muted); }
html[data-theme="light"] .nav-section,
html[data-theme="light"] .nav-group-toggle { color: #64748b; }
html[data-theme="light"] .nav-group-toggle:hover { background: var(--panel-2); color: var(--text); }
html[data-theme="light"] .nav-group-items { border-color: var(--line); }
html[data-theme="light"] .nav-item { color: #475569; }
html[data-theme="light"] .nav-item:hover { background: var(--panel-2); color: var(--text); }
html[data-theme="light"] .nav-item.active { color: #fff; background: linear-gradient(135deg, var(--primary), var(--primary-dark)); box-shadow: 0 8px 18px rgba(79, 70, 229, .25); }
html[data-theme="light"] .brand-mark,
html[data-theme="light"] .user-avatar,
html[data-theme="light"] .business-preview-logo,
html[data-theme="light"] .profile-summary-avatar { background: linear-gradient(135deg, var(--primary), var(--accent)); }
html[data-theme="light"] .icon-button { color: #475569; background: var(--panel-2); border-color: var(--line); }
html[data-theme="light"] .icon-button:hover { color: var(--primary); border-color: #c7d2fe; background: var(--panel-2); }
html[data-theme="light"] .stat-icon,
html[data-theme="light"] .quick-action i { background: #eef2ff; color: var(--primary); }
html[data-theme="light"] .stat-card:nth-child(2) .stat-icon { background: #ecfeff; color: var(--accent); }
html[data-theme="light"] .stat-card:nth-child(3) .stat-icon { background: #ecfdf5; color: var(--success); }
html[data-theme="light"] .stat-card:nth-child(4) .stat-icon { background: #fff7ed; color: var(--warning); }
html[data-theme="light"] .stat-label { color: var(--muted); }
html[data-theme="light"] .stat-value { color: var(--text); }
html[data-theme="light"] .form-label { color: #475569; }
html[data-theme="light"] .form-control,
html[data-theme="light"] input[type=text],
html[data-theme="light"] input[type=password],
html[data-theme="light"] input[type=number],
html[data-theme="light"] select,
html[data-theme="light"] textarea { background: #fff; border-color: var(--line); color: var(--text); }
html[data-theme="light"] .form-control::placeholder,
html[data-theme="light"] input::placeholder,
html[data-theme="light"] textarea::placeholder { color: #94a3b8; }
html[data-theme="light"] .form-control:focus,
html[data-theme="light"] input:focus,
html[data-theme="light"] select:focus,
html[data-theme="light"] textarea:focus { border-color: var(--primary); box-shadow: 0 0 0 3px rgba(79, 70, 229, .12); }
html[data-theme="light"] .btn-secondary { background: var(--panel-2); color: var(--text); border-color: var(--line); }
html[data-theme="light"] .btn-secondary:hover { background: #fff; border-color: #c7d2fe; }
html[data-theme="light"] .btn-primary { background: var(--primary); color: #fff; }
html[data-theme="light"] .btn-primary:hover { background: var(--primary-dark); }
html[data-theme="light"] .table-wrap { border-color: var(--line); background: #fff; }
html[data-theme="light"] .data-table { background: #fff; color: var(--text); }
html[data-theme="light"] .data-table th { background: #f8fafc; color: #64748b; border-color: var(--line); }
html[data-theme="light"] .data-table td { border-color: var(--line); }
html[data-theme="light"] .data-table tr:hover td { background: #fbfdff; }
html[data-theme="light"] .badge { background: #f1f5f9; color: #475569; }
html[data-theme="light"] .badge.success { background: #ecfdf5; color: var(--success); }
html[data-theme="light"] .badge.warning { background: #fff7ed; color: var(--warning); }
html[data-theme="light"] .badge.danger { background: #fef2f2; color: var(--danger); }
html[data-theme="light"] .badge.info { background: #eef2ff; color: var(--primary); }
html[data-theme="light"] .message { background: #f8fafc; color: #475569; border-color: var(--line); }
html[data-theme="light"] .message.error { background: #fef2f2; border-color: #fecaca; color: #991b1b; }
html[data-theme="light"] .message.success { background: #ecfdf5; border-color: #bbf7d0; color: #065f46; }
html[data-theme="light"] .login-page { background: #0f172a; }
html[data-theme="light"] .login-panel { background: #fff; color: var(--text); }
html[data-theme="light"] .login-art { background: radial-gradient(circle at 25% 25%, rgba(8,145,178,.35), transparent 28%), linear-gradient(135deg, #111827, #312e81); }
html[data-theme="light"] .login-card .hint,
html[data-theme="light"] .login-art p { color: var(--muted); }
html[data-theme="light"] .toggle-line { color: #475569; }
html[data-theme="light"] .pos-product,
html[data-theme="light"] .quick-action,
html[data-theme="light"] .business-preview { background: var(--panel-2); border-color: var(--line); }
html[data-theme="light"] .quick-action:hover,
html[data-theme="light"] .pos-product:hover { background: #fff; border-color: #c7d2fe; }
html[data-theme="light"] .pos-cart-total,
html[data-theme="light"] .barcode-spec-row div { background: var(--panel-2); }
html[data-theme="light"] .barcode-preview-shell { background: #eef2f7; border-color: var(--line); }
html[data-theme="light"] .bottom-nav { background: rgba(255, 255, 255, .96); border-color: var(--line); box-shadow: 0 -10px 30px rgba(15, 23, 42, .12); }
html[data-theme="light"] .bottom-nav-item { color: #475569; }
html[data-theme="light"] .bottom-nav-item.active { background: linear-gradient(135deg, var(--primary), var(--primary-dark)); color: #fff; }