/* ============================================================
   Design System — Apple-like glass minimal, #EA4F4F accent
   ============================================================ */

:root {
  --c-primary: #EA4F4F;
  --c-primary-light: #FF6B6B;
  --c-primary-dark: #C73E3E;
  --c-primary-soft: rgba(234, 79, 79, 0.08);
  --c-primary-tint: rgba(234, 79, 79, 0.14);

  --c-bg: #F4F4F6;
  --c-bg-gradient: linear-gradient(180deg, #FAFAFB 0%, #EFF0F3 100%);
  --c-surface: rgba(255, 255, 255, 0.72);
  --c-surface-strong: rgba(255, 255, 255, 0.92);
  --c-border: rgba(0, 0, 0, 0.06);
  --c-border-strong: rgba(0, 0, 0, 0.1);

  --c-text: #1D1D1F;
  --c-text-secondary: #6E6E73;
  --c-text-tertiary: #A1A1A6;

  --c-success: #34C759;
  --c-warning: #FF9F0A;
  --c-danger: #EA4F4F;
  --c-info: #007AFF;

  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.04);
  --shadow: 0 4px 16px rgba(0, 0, 0, 0.06), 0 1px 3px rgba(0, 0, 0, 0.04);
  --shadow-lg: 0 12px 40px rgba(0, 0, 0, 0.08), 0 2px 6px rgba(0, 0, 0, 0.04);
  --shadow-primary: 0 8px 24px rgba(234, 79, 79, 0.24);

  --radius-sm: 8px;
  --radius: 12px;
  --radius-lg: 16px;
  --radius-xl: 20px;

  --blur: blur(24px) saturate(180%);
  --t: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html, body {
  font-family: -apple-system, BlinkMacSystemFont, 'SF Pro Display', 'Inter',
    'Segoe UI', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  font-size: 14px;
  color: var(--c-text);
  background: var(--c-bg-gradient);
  -webkit-font-smoothing: antialiased;
  min-height: 100vh;
}

body::before {
  content: '';
  position: fixed;
  inset: 0;
  z-index: -1;
  background:
    radial-gradient(circle at 20% 10%, rgba(234, 79, 79, 0.08), transparent 50%),
    radial-gradient(circle at 80% 90%, rgba(0, 122, 255, 0.06), transparent 50%);
  pointer-events: none;
}

a { color: var(--c-primary); text-decoration: none; }
a:hover { color: var(--c-primary-dark); }

button, input, select, textarea {
  font-family: inherit;
  font-size: inherit;
  color: inherit;
}

/* ============================================================
   Layout — Sidebar + Topbar + Main
   ============================================================ */

.app-shell {
  display: grid;
  grid-template-columns: 248px 1fr;
  min-height: 100vh;
  transition: grid-template-columns var(--t);
}

.app-shell.collapsed { grid-template-columns: 72px 1fr; }

.sidebar {
  background: var(--c-surface);
  backdrop-filter: var(--blur);
  -webkit-backdrop-filter: var(--blur);
  border-right: 1px solid var(--c-border);
  padding: 18px 12px;
  display: flex;
  flex-direction: column;
  gap: 4px;
  position: sticky;
  top: 0;
  height: 100vh;
  overflow-y: auto;
}

.sidebar-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 10px 18px 10px;
  border-bottom: 1px solid var(--c-border);
  margin-bottom: 12px;
}

.brand-logo {
  width: 32px; height: 32px;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--c-primary), var(--c-primary-light));
  display: grid;
  place-items: center;
  color: white;
  font-weight: 700;
  font-size: 14px;
  letter-spacing: -0.5px;
  flex-shrink: 0;
  box-shadow: var(--shadow-primary);
}

.brand-text {
  font-size: 15px;
  font-weight: 600;
  color: var(--c-text);
  white-space: nowrap;
  overflow: hidden;
}

.collapsed .brand-text,
.collapsed .nav-label,
.collapsed .nav-group-title { display: none; }

.app-shell.collapsed .brand-sub { display: none; }

.collapsed .sidebar-brand { justify-content: center; padding-bottom: 12px; }
.collapsed .nav-item { justify-content: center; padding: 10px; }

.nav-group {
  display: flex;
  flex-direction: column;
  gap: 2px;
  margin-top: 16px;
}

.nav-group-title {
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--c-text-tertiary);
  padding: 0 10px 6px 10px;
}

.nav-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 9px 10px;
  border-radius: var(--radius);
  color: var(--c-text-secondary);
  font-size: 13.5px;
  font-weight: 500;
  cursor: pointer;
  transition: background var(--t), color var(--t), transform var(--t);
  position: relative;
}

.nav-item:hover {
  background: var(--c-primary-soft);
  color: var(--c-text);
}

.nav-item.active {
  background: var(--c-primary);
  color: white;
  box-shadow: var(--shadow-primary);
}

.nav-item.active:hover {
  background: var(--c-primary-dark);
  color: white;
}

.nav-icon {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
  display: grid;
  place-items: center;
}

.nav-icon svg { width: 18px; height: 18px; stroke-width: 2; }

.nav-label { flex: 1; white-space: nowrap; overflow: hidden; }

.nav-badge {
  background: var(--c-primary);
  color: white;
  font-size: 10px;
  font-weight: 700;
  padding: 2px 7px;
  border-radius: 10px;
  min-width: 18px;
  text-align: center;
}

.nav-item.active .nav-badge { background: rgba(255, 255, 255, 0.25); }

.sidebar-footer {
  margin-top: auto;
  padding-top: 12px;
  border-top: 1px solid var(--c-border);
}

/* Main column */

.main-col {
  display: flex;
  flex-direction: column;
  min-width: 0;
}

.topbar {
  height: 64px;
  background: var(--c-surface);
  backdrop-filter: var(--blur);
  -webkit-backdrop-filter: var(--blur);
  border-bottom: 1px solid var(--c-border);
  display: flex;
  align-items: center;
  padding: 0 28px;
  gap: 16px;
  position: sticky;
  top: 0;
  z-index: 50;
}

.topbar-toggle {
  background: transparent;
  border: none;
  width: 32px;
  height: 32px;
  border-radius: 8px;
  cursor: pointer;
  display: grid;
  place-items: center;
  color: var(--c-text-secondary);
  transition: background var(--t);
}

.topbar-toggle:hover { background: var(--c-primary-soft); color: var(--c-text); }

.breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  color: var(--c-text-secondary);
  flex: 1;
}

.breadcrumb .crumb-current {
  color: var(--c-text);
  font-weight: 600;
}

.breadcrumb .sep { opacity: 0.4; }

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

.lang-toggle {
  display: flex;
  background: var(--c-primary-soft);
  border-radius: 10px;
  padding: 3px;
  gap: 2px;
}

.lang-btn {
  background: transparent;
  border: none;
  padding: 5px 12px;
  font-size: 12px;
  font-weight: 600;
  color: var(--c-text-secondary);
  border-radius: 8px;
  cursor: pointer;
  transition: background var(--t), color var(--t);
}

.lang-btn.active {
  background: white;
  color: var(--c-primary);
  box-shadow: var(--shadow-sm);
}

.user-chip {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 6px 12px 6px 6px;
  background: var(--c-surface-strong);
  border-radius: 999px;
  border: 1px solid var(--c-border);
  cursor: pointer;
  position: relative;
}

.user-avatar {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--c-primary), var(--c-primary-light));
  color: white;
  display: grid;
  place-items: center;
  font-size: 12px;
  font-weight: 700;
}

.user-name {
  font-size: 13px;
  font-weight: 500;
  color: var(--c-text);
}

.user-menu {
  position: absolute;
  top: calc(100% + 8px);
  right: 0;
  min-width: 180px;
  background: var(--c-surface-strong);
  backdrop-filter: var(--blur);
  border: 1px solid var(--c-border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-lg);
  padding: 6px;
  display: none;
  z-index: 100;
}

.user-chip.open .user-menu { display: block; }

.user-menu a {
  display: block;
  padding: 9px 12px;
  border-radius: 8px;
  font-size: 13px;
  color: var(--c-text);
  transition: background var(--t);
}

.user-menu a:hover { background: var(--c-primary-soft); }

/* Main content */

.main {
  padding: 28px;
  flex: 1;
  min-width: 0;
}

.page-header {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 20px;
  margin-bottom: 24px;
  flex-wrap: wrap;
}

.page-title {
  font-size: 28px;
  font-weight: 700;
  letter-spacing: -0.4px;
  color: var(--c-text);
}

.page-subtitle {
  font-size: 14px;
  color: var(--c-text-secondary);
  margin-top: 4px;
}

.page-actions { display: flex; gap: 8px; flex-wrap: wrap; }

/* ============================================================
   Cards — Floating glass
   ============================================================ */

.card {
  background: var(--c-surface);
  backdrop-filter: var(--blur);
  -webkit-backdrop-filter: var(--blur);
  border: 1px solid var(--c-border);
  border-radius: var(--radius-lg);
  padding: 22px;
  box-shadow: var(--shadow);
  transition: transform var(--t), box-shadow var(--t);
}

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

.card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 16px;
  gap: 12px;
}

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

.card-subtitle {
  font-size: 12px;
  color: var(--c-text-secondary);
  margin-top: 2px;
}

/* Stat cards */

.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 14px;
  margin-bottom: 24px;
}

.stat-card {
  background: var(--c-surface);
  backdrop-filter: var(--blur);
  -webkit-backdrop-filter: var(--blur);
  border: 1px solid var(--c-border);
  border-radius: var(--radius-lg);
  padding: 18px 20px;
  box-shadow: var(--shadow);
  position: relative;
  overflow: hidden;
  transition: transform var(--t), box-shadow var(--t);
}

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

.stat-card .stat-label {
  font-size: 12px;
  font-weight: 500;
  color: var(--c-text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.stat-card .stat-value {
  font-size: 30px;
  font-weight: 700;
  letter-spacing: -0.5px;
  color: var(--c-text);
  margin-top: 8px;
  line-height: 1.1;
}

.stat-card .stat-icon {
  position: absolute;
  top: 16px;
  right: 16px;
  width: 36px;
  height: 36px;
  border-radius: 10px;
  background: var(--c-primary-soft);
  color: var(--c-primary);
  display: grid;
  place-items: center;
}

.stat-card .stat-icon svg { width: 18px; height: 18px; }

.stat-card .stat-trend {
  font-size: 12px;
  color: var(--c-text-secondary);
  margin-top: 6px;
}

.stat-card.accent {
  background: linear-gradient(135deg, var(--c-primary), var(--c-primary-light));
  border-color: transparent;
  color: white;
}

.stat-card.accent .stat-label,
.stat-card.accent .stat-value,
.stat-card.accent .stat-trend { color: white; }

.stat-card.accent .stat-icon {
  background: rgba(255, 255, 255, 0.2);
  color: white;
}

/* ============================================================
   Buttons
   ============================================================ */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 9px 16px;
  font-size: 13px;
  font-weight: 600;
  font-family: inherit;
  border: none;
  border-radius: var(--radius-sm);
  cursor: pointer;
  text-decoration: none;
  transition: background var(--t), transform var(--t), box-shadow var(--t);
  white-space: nowrap;
}

.btn:hover { transform: translateY(-1px); }
.btn:active { transform: translateY(0); }

.btn-primary { background: var(--c-primary); color: white; }
.btn-primary:hover { background: var(--c-primary-dark); color: white; box-shadow: var(--shadow-primary); }

.btn-secondary {
  background: var(--c-surface-strong);
  color: var(--c-text);
  border: 1px solid var(--c-border-strong);
}
.btn-secondary:hover { background: white; }

.btn-ghost {
  background: transparent;
  color: var(--c-text-secondary);
}
.btn-ghost:hover { background: var(--c-primary-soft); color: var(--c-text); }

.btn-danger { background: var(--c-danger); color: white; }
.btn-danger:hover { background: var(--c-primary-dark); color: white; }

.btn-success { background: var(--c-success); color: white; }
.btn-success:hover { filter: brightness(0.92); color: white; }

.btn-warning { background: var(--c-warning); color: white; }
.btn-warning:hover { filter: brightness(0.92); color: white; }

.btn-info { background: var(--c-info); color: white; }
.btn-info:hover { filter: brightness(0.92); color: white; }

.btn-sm { padding: 6px 11px; font-size: 12px; }
.btn-lg { padding: 12px 22px; font-size: 14px; }

.btn-icon {
  width: 32px;
  height: 32px;
  padding: 0;
  border-radius: 8px;
}

.btn:disabled { opacity: 0.5; cursor: not-allowed; transform: none; }

/* ============================================================
   Forms
   ============================================================ */

.form-group { margin-bottom: 16px; }

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

.form-hint {
  font-size: 12px;
  color: var(--c-text-secondary);
  margin-top: 4px;
}

.form-input,
.form-select,
.form-textarea {
  width: 100%;
  padding: 10px 14px;
  background: var(--c-surface-strong);
  border: 1px solid var(--c-border-strong);
  border-radius: var(--radius-sm);
  font-size: 13.5px;
  color: var(--c-text);
  transition: border-color var(--t), box-shadow var(--t);
  outline: none;
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
  border-color: var(--c-primary);
  box-shadow: 0 0 0 3px var(--c-primary-tint);
}

.form-textarea {
  resize: vertical;
  font-family: inherit;
}

.form-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 12px;
}

/* ============================================================
   Tables
   ============================================================ */

.table-wrap {
  background: var(--c-surface);
  backdrop-filter: var(--blur);
  -webkit-backdrop-filter: var(--blur);
  border: 1px solid var(--c-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
  overflow: hidden;
}

.table-scroll { overflow-x: auto; }

.tbl {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
}

.tbl thead {
  background: rgba(0, 0, 0, 0.02);
}

.tbl th {
  padding: 12px 16px;
  text-align: left;
  font-weight: 600;
  color: var(--c-text-secondary);
  font-size: 11.5px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  white-space: nowrap;
  border-bottom: 1px solid var(--c-border);
}

.tbl td {
  padding: 12px 16px;
  color: var(--c-text);
  border-bottom: 1px solid var(--c-border);
  vertical-align: middle;
}

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

.tbl tbody tr:hover { background: var(--c-primary-soft); }

.tbl .num { text-align: right; font-variant-numeric: tabular-nums; }

/* ============================================================
   Badges
   ============================================================ */

.badge {
  display: inline-flex;
  align-items: center;
  padding: 3px 9px;
  font-size: 11px;
  font-weight: 600;
  border-radius: 999px;
  letter-spacing: 0.02em;
}

.badge-success { background: rgba(52, 199, 89, 0.12); color: #1F8C3A; }
.badge-warning { background: rgba(255, 159, 10, 0.14); color: #B97800; }
.badge-danger  { background: rgba(234, 79, 79, 0.12); color: var(--c-primary-dark); }
.badge-info    { background: rgba(0, 122, 255, 0.1); color: #0048A0; }
.badge-neutral { background: rgba(0, 0, 0, 0.06); color: var(--c-text-secondary); }
.badge-primary { background: var(--c-primary-tint); color: var(--c-primary-dark); }

/* ============================================================
   Flash messages
   ============================================================ */

.flash-wrap {
  position: fixed;
  top: 80px;
  right: 28px;
  z-index: 1000;
  display: flex;
  flex-direction: column;
  gap: 8px;
  max-width: 360px;
}

.flash {
  background: var(--c-surface-strong);
  backdrop-filter: var(--blur);
  border: 1px solid var(--c-border);
  border-left: 3px solid var(--c-primary);
  padding: 12px 14px;
  border-radius: var(--radius);
  box-shadow: var(--shadow-lg);
  font-size: 13px;
  color: var(--c-text);
  animation: flash-in 0.3s ease-out, flash-out 0.3s ease-in 4.7s forwards;
}

.flash.success { border-left-color: var(--c-success); }
.flash.error,
.flash.danger  { border-left-color: var(--c-danger); }
.flash.warning { border-left-color: var(--c-warning); }
.flash.info    { border-left-color: var(--c-info); }

@keyframes flash-in {
  from { opacity: 0; transform: translateX(20px); }
  to   { opacity: 1; transform: translateX(0); }
}

@keyframes flash-out {
  to { opacity: 0; transform: translateX(20px); }
}

/* ============================================================
   Empty / Loading states
   ============================================================ */

.empty-state {
  text-align: center;
  padding: 48px 24px;
  color: var(--c-text-tertiary);
}

.empty-state-icon {
  font-size: 36px;
  margin-bottom: 8px;
  opacity: 0.5;
}

.empty-state-title {
  font-size: 15px;
  font-weight: 600;
  color: var(--c-text-secondary);
  margin-bottom: 4px;
}

.empty-state-text {
  font-size: 13px;
  color: var(--c-text-tertiary);
}

.spinner {
  width: 20px;
  height: 20px;
  border: 2px solid var(--c-border-strong);
  border-top-color: var(--c-primary);
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
  display: inline-block;
}

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

/* ============================================================
   Auth pages — Login/Register
   ============================================================ */

.auth-page {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 24px;
  background:
    radial-gradient(circle at 20% 20%, rgba(234, 79, 79, 0.12), transparent 50%),
    radial-gradient(circle at 80% 80%, rgba(255, 107, 107, 0.08), transparent 50%),
    var(--c-bg);
}

.auth-card {
  width: 100%;
  max-width: 420px;
  background: var(--c-surface-strong);
  backdrop-filter: var(--blur);
  -webkit-backdrop-filter: var(--blur);
  border: 1px solid var(--c-border);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-lg);
  padding: 36px;
}

.auth-brand {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 28px;
}

.auth-brand .brand-logo { width: 44px; height: 44px; border-radius: 12px; font-size: 18px; }

.auth-title {
  font-size: 22px;
  font-weight: 700;
  letter-spacing: -0.4px;
  color: var(--c-text);
  margin-bottom: 4px;
}

.auth-subtitle {
  font-size: 13.5px;
  color: var(--c-text-secondary);
  margin-bottom: 24px;
}

.auth-footer {
  margin-top: 20px;
  text-align: center;
  font-size: 13px;
  color: var(--c-text-secondary);
}

/* ============================================================
   Modal
   ============================================================ */

.modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.25);
  backdrop-filter: blur(8px);
  z-index: 200;
  display: none;
  align-items: center;
  justify-content: center;
  padding: 24px;
}

.modal-backdrop.open { display: flex; }

.modal {
  background: var(--c-surface-strong);
  backdrop-filter: var(--blur);
  border: 1px solid var(--c-border);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-lg);
  max-width: 500px;
  width: 100%;
  max-height: 90vh;
  overflow-y: auto;
  padding: 28px;
}

.modal-title {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 12px;
  color: var(--c-text);
}

.modal-actions {
  display: flex;
  gap: 8px;
  justify-content: flex-end;
  margin-top: 20px;
}

/* ============================================================
   Misc utilities
   ============================================================ */

.row { display: flex; gap: 12px; align-items: center; flex-wrap: wrap; }
.gap-2 { gap: 8px; } .gap-3 { gap: 12px; } .gap-4 { gap: 16px; }
.flex-1 { flex: 1; }
.text-sm { font-size: 12px; }
.text-secondary { color: var(--c-text-secondary); }
.text-right { text-align: right; }
.text-center { text-align: center; }
.muted { opacity: 0.6; }
.divider { border-top: 1px solid var(--c-border); margin: 16px 0; }
.scroll-y { overflow-y: auto; }
.hidden { display: none !important; }

/* Product grid */

.product-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 16px;
}

.product-card {
  background: var(--c-surface-strong);
  border: 1px solid var(--c-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: transform var(--t), box-shadow var(--t);
  display: flex;
  flex-direction: column;
}

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

.product-image {
  width: 100%;
  aspect-ratio: 1;
  background: rgba(0, 0, 0, 0.03);
  display: grid;
  place-items: center;
  overflow: hidden;
}

.product-image img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  padding: 12px;
}

.product-image-placeholder {
  color: var(--c-text-tertiary);
  font-size: 12px;
}

.product-body { padding: 14px; display: flex; flex-direction: column; gap: 6px; flex: 1; }

.product-cat {
  font-size: 10.5px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--c-primary);
}

.product-name {
  font-size: 13.5px;
  font-weight: 600;
  color: var(--c-text);
  line-height: 1.35;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  min-height: 2.7em;
}

.product-price {
  font-size: 18px;
  font-weight: 700;
  color: var(--c-text);
  letter-spacing: -0.3px;
  margin-top: auto;
}

.price-sale {
  color: #e53935;
}

.price-original {
  font-size: 13px;
  color: var(--c-text-secondary);
  text-decoration: line-through;
  margin-bottom: 2px;
}

.discount-star {
  position: absolute;
  top: 8px;
  right: 8px;
  width: 48px;
  height: 48px;
  background: #e53935;
  color: #fff;
  font-size: 12px;
  font-weight: 800;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  box-shadow: 0 2px 8px rgba(229, 57, 53, 0.4);
  z-index: 2;
  line-height: 1;
  letter-spacing: -0.3px;
}

.grade-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 20px;
  height: 20px;
  border-radius: 4px;
  font-size: 11px;
  font-weight: 800;
  line-height: 1;
  color: #fff;
  flex-shrink: 0;
}
.grade-a { background: #43a047; }
.grade-b { background: #1e88e5; }
.grade-c { background: #fb8c00; }
.grade-d { background: #e53935; }

.product-meta {
  font-size: 11.5px;
  color: var(--c-text-secondary);
}

.product-actions {
  padding: 0 14px 14px;
}

.product-actions .btn { width: 100%; }

/* Modal dialog */
.app-dialog {
  border: none;
  border-radius: 12px;
  padding: 0;
  max-width: 420px;
  width: 90%;
  box-shadow: 0 20px 60px rgba(0,0,0,.3);
  margin: auto;
  position: fixed;
  inset: 0;
}
.app-dialog::backdrop {
  background: rgba(0,0,0,0.4);
  backdrop-filter: blur(2px);
}

/* Responsive */

@media (max-width: 900px) {
  .app-shell {
    grid-template-columns: 1fr;
  }
  .sidebar {
    position: fixed;
    left: 0; top: 0; bottom: 0;
    width: 260px;
    z-index: 1000;
    transform: translateX(-100%);
    transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  }
  .app-shell.sidebar-open .sidebar {
    transform: translateX(0);
  }
  .sidebar-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.4);
    z-index: 999;
  }
  .app-shell.sidebar-open .sidebar-overlay {
    display: block;
  }
  .app-shell.collapsed .sidebar {
    transform: translateX(-100%);
  }
  .app-shell.collapsed.sidebar-open .sidebar {
    transform: translateX(0);
  }
  .brand-text, .nav-label, .nav-group-title { display: block; }
  .sidebar-brand { justify-content: flex-start; }
  .nav-item { justify-content: flex-start; padding: 9px 10px; }
  .main { padding: 20px; }
  .page-title { font-size: 22px; }
  .product-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 10px;
  }
  .product-name { font-size: 12px; min-height: 2.4em; }
  .product-price { font-size: 15px; }
  .product-body { padding: 10px; gap: 4px; }
  .product-actions { padding: 0 10px 10px; }
  .product-image { aspect-ratio: 1; }
  .page-header { flex-direction: column; align-items: flex-start; gap: 10px; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 10px; }
  .table-scroll { overflow-x: auto; -webkit-overflow-scrolling: touch; }
}

@media (max-width: 600px) {
  .topbar { padding: 0 16px; }
  .main { padding: 16px; }
  .auth-card { padding: 24px; }
  .stats-grid { grid-template-columns: 1fr 1fr; }
  .lang-toggle { padding: 2px; }
  .lang-btn { padding: 4px 8px; font-size: 11px; }
  .user-name { display: none; }
}