:root {
  --bg: #FFFFFF; --bg-subtle: #F8FAFC; --bg-panel: #FFFFFF;
  --ink: #0F172A; --ink-muted: #475569; --ink-soft: #64748B; --ink-fade: #94A3B8;
  --border: #E2E8F0; --border-strong: #CBD5E1;
  --accent-red: #DC2626; --accent-red-soft: #FEF2F2;
  --success: #16A34A; --success-bg: #DCFCE7;
  --warning: #EA580C; --warning-bg: #FEF3C7;
  --info: #2563EB; --info-bg: #DBEAFE;
  --sidebar-bg: #0F172A;
  --safe-bottom: env(safe-area-inset-bottom, 0px);
}
* { box-sizing: border-box; margin: 0; padding: 0; -webkit-tap-highlight-color: transparent; }
html { -webkit-text-size-adjust: 100%; }
body { font-family: 'Geist', -apple-system, sans-serif; background: var(--bg-subtle); color: var(--ink); font-size: 14px; line-height: 1.5; -webkit-font-smoothing: antialiased; }
body.no-scroll { overflow: hidden; }
a { color: inherit; text-decoration: none; }
code { font-family: ui-monospace, SFMono-Regular, Consolas, monospace; font-size: 12px; background: var(--bg-subtle); padding: 2px 6px; border-radius: 4px; }
input, select, textarea, button { font-family: inherit; }
input[type="text"], input[type="email"], input[type="search"], input[type="password"], input[type="number"], input[type="url"], select, textarea {
  font-size: 14px; background: var(--bg); border: 1px solid var(--border); border-radius: 6px; padding: 10px 12px; color: var(--ink); outline: none; transition: border-color .15s; width: 100%; -webkit-appearance: none;
}
@media (max-width: 768px) {
  input[type="text"], input[type="email"], input[type="search"], input[type="password"], input[type="number"], input[type="url"], select, textarea { font-size: 16px; }
}
input:focus, select:focus, textarea:focus { border-color: var(--ink); }
.btn-primary { background: var(--ink); color: var(--bg); padding: 10px 16px; border: none; border-radius: 6px; cursor: pointer; font-size: 13px; font-weight: 500; display: inline-flex; align-items: center; gap: 6px; min-height: 40px; }
.btn-primary:hover { background: #1E293B; }
.btn-primary i { font-size: 16px; }
.btn-secondary { background: var(--bg); color: var(--ink); padding: 10px 16px; border: 1px solid var(--border-strong); border-radius: 6px; cursor: pointer; font-size: 13px; font-weight: 500; display: inline-flex; align-items: center; gap: 6px; min-height: 40px; }
.btn-secondary:hover { border-color: var(--ink); }
.btn-secondary i { font-size: 16px; }

/* Login */
.login-body { min-height: 100vh; background: linear-gradient(135deg, #0F172A 0%, #1E293B 100%); display: flex; align-items: center; justify-content: center; padding: 20px; }
.login-card { background: var(--bg); border-radius: 12px; padding: 36px 32px; width: 100%; max-width: 400px; box-shadow: 0 25px 50px -12px rgba(0,0,0,.4); }
.login-logo { display: flex; align-items: center; gap: 10px; font-size: 22px; font-weight: 500; margin-bottom: 6px; }
.login-logo .logo-mark { background: var(--ink); color: var(--bg); padding: 5px 10px; border-radius: 6px; font-size: 14px; font-weight: 600; }
.login-subtitle { font-size: 12px; color: var(--ink-soft); letter-spacing: .1em; text-transform: uppercase; margin-bottom: 28px; }
.login-card label { display: block; font-size: 12px; font-weight: 500; margin-bottom: 6px; color: var(--ink-muted); }
.login-card input { margin-bottom: 14px; padding: 12px 14px; }
.login-card .btn-primary { width: 100%; padding: 13px; justify-content: center; margin-top: 8px; min-height: 46px; }
.login-error { background: var(--accent-red-soft); color: var(--accent-red); padding: 10px 14px; border-radius: 6px; font-size: 13px; margin-bottom: 14px; display: flex; align-items: center; gap: 8px; border: 1px solid #FCA5A5; }
.login-error i { font-size: 18px; }
.login-hint { margin-top: 20px; padding: 12px 14px; background: var(--bg-subtle); border-radius: 6px; font-size: 12px; color: var(--ink-muted); line-height: 1.7; }
.login-hint code { background: var(--bg); padding: 1px 6px; border-radius: 3px; }

/* Mobile admin top bar */
.admin-mobile-bar { display: none; background: var(--sidebar-bg); color: var(--bg); padding: 12px 16px; position: sticky; top: 0; z-index: 50; align-items: center; gap: 12px; }
.admin-mobile-bar-btn { background: transparent; border: none; color: var(--bg); width: 36px; height: 36px; display: flex; align-items: center; justify-content: center; cursor: pointer; border-radius: 6px; }
.admin-mobile-bar-btn:hover { background: rgba(255,255,255,.1); }
.admin-mobile-bar-btn i { font-size: 22px; }
.admin-mobile-bar-title { flex: 1; font-size: 15px; font-weight: 500; }
.admin-mobile-bar-logo { display: flex; align-items: center; gap: 8px; font-size: 15px; font-weight: 500; }
.admin-mobile-bar-logo .logo-mark { background: var(--bg); color: var(--ink); padding: 3px 7px; border-radius: 4px; font-size: 12px; font-weight: 600; }

/* Admin layout */
.admin-body { background: var(--bg-subtle); padding-left: 240px; min-height: 100vh; }
.admin-sidebar { position: fixed; top: 0; left: 0; bottom: 0; width: 240px; background: var(--sidebar-bg); color: rgba(255,255,255,.8); padding: 24px 0; display: flex; flex-direction: column; z-index: 100; }
.admin-sidebar-overlay { display: none; position: fixed; inset: 0; background: rgba(0,0,0,.5); z-index: 99; opacity: 0; pointer-events: none; transition: opacity .2s; }
.admin-sidebar-overlay.open { opacity: 1; pointer-events: auto; }
.admin-logo { display: flex; align-items: center; gap: 10px; padding: 0 24px 24px; font-size: 18px; font-weight: 500; color: var(--bg); border-bottom: 1px solid rgba(255,255,255,.08); }
.admin-logo .logo-mark { background: var(--bg); color: var(--ink); padding: 4px 9px; border-radius: 5px; font-size: 13px; font-weight: 600; }
.admin-section-label { font-size: 10px; letter-spacing: .14em; text-transform: uppercase; color: rgba(255,255,255,.4); padding: 18px 24px 8px; font-weight: 500; }
.admin-nav { display: flex; flex-direction: column; }
.admin-nav-item { display: flex; align-items: center; gap: 10px; padding: 11px 24px; font-size: 14px; color: rgba(255,255,255,.7); cursor: pointer; transition: all .15s; min-height: 44px; }
.admin-nav-item:hover { color: var(--bg); background: rgba(255,255,255,.04); }
.admin-nav-item.active { color: var(--bg); background: rgba(255,255,255,.08); border-right: 2px solid #DC2626; }
.admin-nav-item i { font-size: 18px; }
.admin-sidebar-footer { margin-top: auto; padding: 16px 24px; border-top: 1px solid rgba(255,255,255,.08); }
.admin-user { display: flex; align-items: center; gap: 10px; }
.admin-user-avatar { width: 36px; height: 36px; background: var(--accent-red); color: var(--bg); border-radius: 50%; display: flex; align-items: center; justify-content: center; font-weight: 600; font-size: 14px; flex-shrink: 0; }
.admin-user-name { font-size: 13px; color: var(--bg); margin-bottom: 2px; }
.admin-user .admin-link { font-size: 11px; color: rgba(255,255,255,.5); cursor: pointer; }
.admin-user .admin-link:hover { color: var(--bg); }
.admin-main { padding: 28px 32px 60px; max-width: 1400px; }
.admin-link { color: #2563EB; cursor: pointer; font-size: 13px; }
.admin-link:hover { text-decoration: underline; }

/* Flash messages */
.flash { padding: 12px 16px; border-radius: 6px; margin-bottom: 20px; font-size: 13px; display: flex; align-items: center; gap: 8px; }
.flash-success { background: var(--success-bg); color: #14532D; border: 1px solid #86EFAC; }
.flash-error { background: var(--accent-red-soft); color: #7F1D1D; border: 1px solid #FCA5A5; }
.flash i { font-size: 18px; }

/* Page header */
.admin-page-header { display: flex; justify-content: space-between; align-items: flex-start; margin-bottom: 22px; gap: 16px; flex-wrap: wrap; }
.admin-page-header h1 { font-size: 22px; font-weight: 500; letter-spacing: -.01em; margin-bottom: 4px; }
.admin-page-header p { font-size: 13px; color: var(--ink-soft); }

/* Panels */
.admin-panel { background: var(--bg-panel); border-radius: 10px; border: 1px solid var(--border); padding: 20px; margin-bottom: 16px; }
.admin-panel-header { display: flex; justify-content: space-between; align-items: center; padding-bottom: 14px; margin-bottom: 14px; border-bottom: 1px solid var(--border); gap: 8px; flex-wrap: wrap; }
.admin-panel-header h2 { font-size: 15px; font-weight: 500; }
.admin-panel h2 { font-size: 16px; font-weight: 500; }
.admin-panel h3 { font-size: 14px; font-weight: 500; }

/* Stats */
.stats-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 12px; margin-bottom: 22px; }
.stat-card { background: var(--bg-panel); border: 1px solid var(--border); border-radius: 10px; padding: 16px; display: flex; gap: 12px; align-items: flex-start; }
.stat-icon { width: 40px; height: 40px; border-radius: 8px; display: flex; align-items: center; justify-content: center; flex-shrink: 0; }
.stat-icon i { font-size: 20px; }
.stat-num { font-size: 22px; font-weight: 500; letter-spacing: -.01em; line-height: 1; margin-bottom: 4px; }
.stat-label { font-size: 12px; color: var(--ink-muted); margin-bottom: 2px; }
.stat-detail { font-size: 11px; color: var(--ink-fade); }

/* Grid layout */
.admin-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
@media (max-width: 1100px) { .admin-grid { grid-template-columns: 1fr; } }

/* Tables */
.admin-table-wrap { overflow-x: auto; -webkit-overflow-scrolling: touch; margin: 0 -20px; padding: 0 20px; }
.admin-table { width: 100%; border-collapse: collapse; font-size: 13px; min-width: 600px; }
.admin-table th { text-align: left; padding: 10px 12px; font-size: 11px; font-weight: 500; letter-spacing: .05em; text-transform: uppercase; color: var(--ink-soft); border-bottom: 1px solid var(--border); white-space: nowrap; }
.admin-table td { padding: 12px; border-bottom: 1px solid var(--border); vertical-align: middle; }
.admin-table tr:last-child td { border-bottom: none; }
.admin-table tr:hover td { background: rgba(15,23,42,.015); }
.admin-table .product-name-link { font-weight: 500; color: var(--ink); display: block; }
.admin-table .product-name-link:hover { color: var(--accent-red); }

/* Filter bar */
.filter-bar { display: flex; justify-content: space-between; align-items: center; padding-bottom: 16px; margin-bottom: 16px; border-bottom: 1px solid var(--border); gap: 12px; flex-wrap: wrap; }
.filter-tabs { display: flex; gap: 4px; flex-wrap: wrap; }
.filter-tab { padding: 7px 12px; font-size: 13px; color: var(--ink-muted); border-radius: 6px; cursor: pointer; display: inline-flex; align-items: center; gap: 6px; min-height: 32px; }
.filter-tab:hover { background: var(--bg-subtle); }
.filter-tab.active { background: var(--ink); color: var(--bg); }
.filter-tab .ct { background: rgba(255,255,255,.15); font-size: 10px; padding: 1px 6px; border-radius: 8px; }
.filter-tab:not(.active) .ct { background: var(--bg-subtle); color: var(--ink-soft); }
.filter-controls { display: flex; gap: 8px; align-items: center; flex-wrap: wrap; }
.filter-controls input, .filter-controls select { width: auto; padding: 8px 10px; font-size: 13px; min-width: 140px; }

/* Badges */
.badge { display: inline-flex; align-items: center; padding: 2px 8px; font-size: 11px; font-weight: 500; border-radius: 12px; line-height: 1.4; }
.badge-default { background: var(--bg-subtle); color: var(--ink-muted); }
.badge-success { background: var(--success-bg); color: #14532D; }
.badge-warning { background: var(--warning-bg); color: var(--warning); }
.badge-error { background: var(--accent-red-soft); color: var(--accent-red); }
.badge-info { background: var(--info-bg); color: var(--info); }
.mini-badge { display: inline-block; font-size: 9px; font-weight: 500; padding: 1px 6px; border-radius: 8px; margin-right: 4px; margin-top: 4px; }
.mini-badge-green { background: var(--success-bg); color: #14532D; }
.mini-badge-yellow { background: var(--warning-bg); color: var(--warning); }
.mini-badge-blue { background: var(--info-bg); color: var(--info); }

/* Product table */
.product-thumb-mini { width: 40px; height: 40px; background: var(--bg-subtle); border-radius: 6px; display: flex; align-items: center; justify-content: center; color: var(--ink-fade); overflow: hidden; flex-shrink: 0; }
.product-thumb-mini img { width: 100%; height: 100%; object-fit: contain; padding: 4px; }
.product-thumb-mini i { font-size: 18px; }
.product-meta-line { font-size: 11px; color: var(--ink-soft); margin-top: 2px; }
.inline-stock-form { display: flex; align-items: center; gap: 8px; }
.stock-input { width: 60px; padding: 5px 6px; font-size: 12px; text-align: center; }
.toggle-btn { width: 38px; height: 22px; border: none; border-radius: 12px; background: var(--border-strong); position: relative; cursor: pointer; padding: 0; flex-shrink: 0; }
.toggle-btn.on { background: var(--success); }
.toggle-btn span { position: absolute; top: 2px; left: 2px; width: 18px; height: 18px; background: white; border-radius: 50%; transition: transform .15s; }
.toggle-btn.on span { transform: translateX(16px); }
.actions-cell { white-space: nowrap; }
.actions-cell .icon-btn { display: inline-flex; align-items: center; justify-content: center; width: 32px; height: 32px; border: 1px solid var(--border); border-radius: 6px; background: var(--bg); color: var(--ink-muted); cursor: pointer; margin: 0 1px; }
.actions-cell .icon-btn:hover { border-color: var(--ink); color: var(--ink); }
.actions-cell .icon-btn.danger:hover { border-color: var(--accent-red); color: var(--accent-red); background: var(--accent-red-soft); }
.actions-cell .icon-btn i { font-size: 14px; }

/* Empty state */
.empty-state { text-align: center; padding: 40px 20px; color: var(--ink-soft); }
.empty-state i { font-size: 40px; color: var(--success); margin-bottom: 12px; }
.empty-state p { font-size: 14px; margin-bottom: 8px; }

/* Quick actions */
.quick-actions { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 10px; }
.quick-action-card { background: var(--bg-subtle); border: 1px solid var(--border); border-radius: 8px; padding: 16px; display: flex; align-items: center; gap: 12px; cursor: pointer; transition: all .15s; color: var(--ink); min-height: 60px; }
.quick-action-card:hover { border-color: var(--ink); transform: translateY(-1px); }
.quick-action-card i { font-size: 22px; color: var(--accent-red); }

/* Product edit form */
.product-edit-form { background: transparent; }
.form-layout { display: grid; grid-template-columns: 1fr 320px; gap: 16px; }
.form-main { display: flex; flex-direction: column; gap: 16px; }
.form-sidebar { display: flex; flex-direction: column; gap: 16px; position: sticky; top: 20px; align-self: flex-start; }
.form-section { background: var(--bg-panel); border: 1px solid var(--border); border-radius: 10px; padding: 18px; }
.form-section h3 { font-size: 14px; font-weight: 500; margin-bottom: 6px; }
.form-section .section-help { font-size: 12px; color: var(--ink-soft); margin-bottom: 14px; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.form-group { margin-bottom: 14px; }
.form-group:last-child { margin-bottom: 0; }
.form-group label { display: block; font-size: 12px; font-weight: 500; color: var(--ink-muted); margin-bottom: 5px; }
.form-group label small { color: var(--ink-fade); font-weight: 400; }
.form-group small { font-size: 11px; color: var(--ink-fade); display: block; margin-top: 4px; }
.form-group .mono { font-family: ui-monospace, SFMono-Regular, monospace; font-size: 12px; }
.form-group code { font-size: 11px; }
.checkbox-label { display: flex; align-items: center; gap: 8px; font-size: 13px; color: var(--ink); cursor: pointer; padding: 6px 0; min-height: 32px; }
.checkbox-label input { width: auto; accent-color: var(--ink); }
.form-actions { display: flex; flex-direction: column; gap: 8px; }
.form-actions .btn-primary, .form-actions .btn-secondary { width: 100%; justify-content: center; padding: 12px; min-height: 44px; }
.settings-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.settings-grid .form-group.full { grid-column: 1 / -1; }

/* TABLET breakpoint */
@media (max-width: 1024px) {
  .admin-main { padding: 24px 24px 60px; }
  .filter-bar { flex-direction: column; align-items: stretch; }
  .filter-controls { width: 100%; }
  .filter-controls input, .filter-controls select { flex: 1; min-width: 0; }
}

/* MOBILE breakpoint */
@media (max-width: 900px) {
  .admin-body { padding-left: 0; }
  .admin-mobile-bar { display: flex; }
  .admin-sidebar { transform: translateX(-100%); transition: transform .25s; width: 280px; max-width: 85vw; }
  .admin-sidebar.open { transform: translateX(0); box-shadow: 4px 0 24px rgba(0,0,0,.2); }
  .admin-main { padding: 20px 16px 60px; }
  .admin-page-header h1 { font-size: 20px; }
  .form-layout { grid-template-columns: 1fr; }
  .form-sidebar { position: static; }
  .settings-grid { grid-template-columns: 1fr; }
  .form-row { grid-template-columns: 1fr; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .stat-card { padding: 14px; }
  .stat-num { font-size: 19px; }
  .admin-panel { padding: 16px; }
  .filter-tabs { width: 100%; overflow-x: auto; -webkit-overflow-scrolling: touch; flex-wrap: nowrap; padding-bottom: 4px; }
  .filter-tab { flex-shrink: 0; }
  .quick-actions { grid-template-columns: 1fr; }
  .admin-table-wrap { margin: 0 -16px; padding: 0 16px; }
}

/* SMALL MOBILE */
@media (max-width: 480px) {
  .login-card { padding: 28px 22px; }
  .stats-grid { grid-template-columns: 1fr; }
  .form-section { padding: 14px; }
}

/* Image upload */
.image-upload-zone { display: flex; align-items: center; gap: 12px; flex-wrap: wrap; padding: 14px; background: var(--bg-subtle); border: 1px dashed var(--border-strong); border-radius: 8px; margin-bottom: 10px; }
.image-upload-zone.dragover { border-color: var(--ink); background: #EFF6FF; }
.image-upload-hint { font-size: 12px; color: var(--ink-soft); flex: 1; min-width: 200px; }
.image-upload-status { font-size: 12px; font-weight: 500; }
.image-upload-status.success { color: var(--success); }
.image-upload-status.error { color: var(--accent-red); }
.image-upload-status.loading { color: var(--ink-muted); }
.image-preview-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(80px, 1fr)); gap: 8px; margin-bottom: 10px; max-width: 100%; }
.image-preview-item { aspect-ratio: 1; background: var(--bg); border: 1px solid var(--border); border-radius: 6px; position: relative; overflow: hidden; }
.image-preview-item img { width: 100%; height: 100%; object-fit: contain; padding: 4px; }
.image-preview-item .remove { position: absolute; top: 4px; right: 4px; background: rgba(15,23,42,.9); color: white; border: none; width: 22px; height: 22px; border-radius: 50%; cursor: pointer; display: flex; align-items: center; justify-content: center; opacity: 0; transition: opacity .15s; }
.image-preview-item:hover .remove { opacity: 1; }
.image-preview-item .remove i { font-size: 14px; }
.image-preview-item.primary::before { content: "Main"; position: absolute; top: 4px; left: 4px; background: var(--ink); color: white; font-size: 9px; padding: 2px 5px; border-radius: 3px; font-weight: 500; }