:root {
    /* Brand colors */
    --brand-primary: #FFD700;
    --brand-dark: #0F172A;
    --brand-accent: #D4AF37;

    /* Functional colors */
    --color-success: #22C55E;
    --color-warning: #F59E0B;
    --color-danger: #EF4444;
    --color-info: #3B82F6;

    /* Typography */
    --font-heading: 'Noto Serif TC', 'Microsoft JhengHei', serif;
    --font-body: 'Noto Sans TC', 'Microsoft JhengHei', sans-serif;
    --font-mono: 'Courier New', monospace;

    /* Spacing scale */
    --space-xs: 4px;
    --space-sm: 8px;
    --space-md: 16px;
    --space-lg: 24px;
    --space-xl: 32px;
    --space-2xl: 48px;

    /* Border radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --radius-full: 9999px;

    /* Shadows */
    --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
    --shadow-md: 0 4px 6px rgba(0,0,0,0.1);
    --shadow-lg: 0 10px 15px rgba(0,0,0,0.1);
    --shadow-xl: 0 20px 25px rgba(0,0,0,0.15);

    /* Transitions */
    --transition-fast: 100ms ease;
    --transition-normal: 200ms ease;
    --transition-slow: 300ms ease;

    /* Z-index scale */
    --z-dropdown: 10;
    --z-sticky: 20;
    --z-fixed: 30;
    --z-modal-backdrop: 40;
    --z-modal: 50;
    --z-toast: 60;

    /* Surface defaults (dark - kiosk default) */
    --surface-bg: #050505;
    --surface-card: rgba(255, 255, 255, 0.08);
    --surface-card-hover: rgba(255, 255, 255, 0.12);
    --text-primary: #F8FAFC;
    --text-secondary: #94A3B8;
    --text-muted: #64748B;
    --border-color: rgba(255, 255, 255, 0.1);
}

/* Admin theme override */
[data-portal="admin"] {
    /* 商務藍主題 */
    --surface-bg: #f4f6fb;
    --surface-card: #ffffff;
    --surface-card-hover: #eef2ff;
    --text-primary: #0f172a;
    --text-secondary: #475569;
    --text-muted: #94a3b8;
    --border-color: #e2e8f0;
    --brand-primary: #1d4ed8;
    --brand-dark: #111827;
    --brand-accent: #0ea5e9;
}

[data-portal="admin"] body {
    background: var(--surface-bg);
}

[data-portal="admin"] .card {
    border-radius: 14px;
    border: 1px solid var(--border-color);
    box-shadow: 0 10px 30px rgba(31, 45, 90, 0.08);
}
[data-portal="admin"] .card-header {
    background: #fff;
    border-bottom: 1px solid var(--border-color);
}
[data-portal="admin"] .card-footer {
    background: #fff;
    border-top: 1px solid var(--border-color);
}

[data-portal="admin"] .btn {
    border-radius: 999px;
    font-weight: 600;
    padding: 10px 16px;
}
[data-portal="admin"] .btn-primary {
    background: var(--brand-primary);
    border-color: var(--brand-primary);
    color: #fff;
}
[data-portal="admin"] .btn-primary:hover,
[data-portal="admin"] .btn-primary:focus {
    background: #1e40af;
    border-color: #1e40af;
}
[data-portal="admin"] .btn-outline-primary {
    color: var(--brand-primary);
    border-color: var(--brand-primary);
}
[data-portal="admin"] .btn-outline-primary:hover,
[data-portal="admin"] .btn-outline-primary:focus {
    background: var(--brand-primary);
    color: #fff;
}

[data-portal="admin"] .badge.bg-primary,
[data-portal="admin"] .badge-primary {
    background: var(--brand-primary);
    color: #fff;
}
[data-portal="admin"] .badge.bg-secondary,
[data-portal="admin"] .badge-secondary {
    background: var(--brand-accent);
    color: #fff;
}

[data-portal="admin"] .table {
    border-color: var(--border-color);
}
[data-portal="admin"] .table-striped tbody tr:nth-of-type(odd) {
    background-color: rgba(148, 163, 184, 0.08);
}
[data-portal="admin"] .table thead {
    position: sticky;
    top: 0;
    background: #f8fafc;
    z-index: 2;
    box-shadow: inset 0 -1px 0 var(--border-color);
}
[data-portal="admin"] .table > :not(caption) > * > * {
    padding: 0.75rem 1rem;
    vertical-align: middle;
}

[data-portal="admin"] .form-control,
[data-portal="admin"] .form-select {
    border-radius: 10px;
    border-color: var(--border-color);
}
[data-portal="admin"] .form-control:focus,
[data-portal="admin"] .form-select:focus {
    border-color: var(--brand-primary);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.15);
}

/* Store theme override */
[data-portal="store"] {
    --surface-bg: #F8FAFC;
    --surface-card: #FFFFFF;
    --surface-card-hover: #ECFDF5;
    --text-primary: #0F172A;
    --text-secondary: #475569;
    --text-muted: #94A3B8;
    --border-color: #E2E8F0;
    --brand-primary: #10B981;
}

/* Dark Theme */
[data-theme="dark"] {
  --surface-bg: #1E293B;
  --surface-card: #334155;
  --text-primary: #F1F5F9;
  --text-secondary: #94A3B8;
  --text-muted: #64748B;
  --border-color: #475569;
  --background-color: #0F172A;
  --shadow-sm: 0 1px 2px rgba(0,0,0,0.3);
  --shadow-md: 0 4px 6px rgba(0,0,0,0.4);
}

[data-theme="dark"] body {
  background-color: var(--background-color);
  color: var(--text-primary);
}

[data-theme="dark"] .card,
[data-theme="dark"] .stat-card,
[data-theme="dark"] .skeleton-card {
  background-color: var(--surface-card);
  color: var(--text-primary);
  border-color: var(--border-color);
}

[data-theme="dark"] .table {
  color: var(--text-primary);
  --bs-table-bg: transparent;
  --bs-table-striped-bg: rgba(255,255,255,0.05);
}

[data-theme="dark"] .form-control,
[data-theme="dark"] .form-select {
  background-color: var(--surface-card);
  color: var(--text-primary);
  border-color: var(--border-color);
}

[data-theme="dark"] .modal-content {
  background-color: var(--surface-card);
  color: var(--text-primary);
}

[data-theme="dark"] .alert {
  border-color: var(--border-color);
}

[data-theme="dark"] .sidebar-desktop {
  background-color: #0F172A;
}

[data-theme="dark"] .top-bar {
  background-color: var(--surface-card);
  border-bottom-color: var(--border-color);
}

[data-theme="dark"] .content-area {
  background-color: var(--background-color);
}

[data-theme="dark"] .text-muted {
  color: var(--text-muted) !important;
}

/* ============================================
   Kiosk Touch Target Standards
   ============================================
   AAA (60px): Primary action buttons, tabs, payment buttons
   AA  (44px): Secondary controls, close buttons, quantity steppers
   All kiosk interactive elements get touch-action: manipulation
   ============================================ */

/* Base: all kiosk interactive elements get touch optimization */
[data-portal="kiosk"] button,
[data-portal="kiosk"] .btn,
[data-portal="kiosk"] [role="button"],
.fullscreen-kiosk button,
.fullscreen-kiosk .btn,
.fullscreen-kiosk [role="button"],
.kiosk-shop button,
.kiosk-shop .btn,
.kiosk-shop [role="button"],
.checkout-container button,
.checkout-container .btn,
.checkout-container [role="button"] {
    touch-action: manipulation;
}

/* AAA targets (60px) - Primary actions only */
[data-portal="kiosk"] .btn,
[data-portal="kiosk"] [role="button"],
.fullscreen-kiosk .btn,
.fullscreen-kiosk [role="button"],
.fullscreen-kiosk .tab-item,
.fullscreen-kiosk .welcome-btn,
.fullscreen-kiosk .btn-checkout,
.kiosk-shop .btn,
.kiosk-shop [role="button"],
.checkout-container .btn,
.checkout-container [role="button"],
.checkout-container .payment-option {
    min-height: 60px;
    min-width: 60px;
}

/* AA targets (44px) - Secondary/compact controls */
[data-portal="kiosk"] button:not(.btn):not([role="button"]),
.fullscreen-kiosk button:not(.btn):not([role="button"]),
.kiosk-shop button:not(.btn):not([role="button"]),
.checkout-container button:not(.btn):not([role="button"]),
.btn-close-modal,
.cart-controls button,
.kiosk-qty-btn {
    min-height: 44px;
    min-width: 44px;
}

/* Touch target spacing */
[data-portal="kiosk"] .btn + .btn,
.fullscreen-kiosk .btn + .btn,
.kiosk-shop .btn + .btn,
.checkout-container .btn + .btn {
    margin-left: var(--space-sm, 8px);
}

/* Prevent accidental text selection on kiosk touch elements */
.item-card,
.welcome-btn,
.numpad-btn,
.checkout-btn,
.btn-checkout,
.member-option,
.service-card,
.branch-card,
.category-tab,
.payment-option,
.cart-bar,
.cart-summary-bar,
.tab-bar,
.tab-btn,
.tab-navigation,
.video-nav,
.video-indicator,
.btn-return,
.btn-minus,
.btn-plus,
[role="button"] {
    user-select: none;
    -webkit-user-select: none;
}

/* ============================================
   Entrance Animations
   ============================================
   Reusable fade-in-up animation for page content.
   Apply .animate-in to any element for a subtle entrance.
   Use delay variants for staggered reveals.
   ============================================ */
@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(12px); }
    to { opacity: 1; transform: translateY(0); }
}

.animate-in {
    animation: fadeInUp 0.4s ease-out both;
}

.animate-in-delay-1 { animation-delay: 0.1s; }
.animate-in-delay-2 { animation-delay: 0.2s; }
.animate-in-delay-3 { animation-delay: 0.3s; }

@media (prefers-reduced-motion: reduce) {
    .animate-in,
    .animate-in-delay-1,
    .animate-in-delay-2,
    .animate-in-delay-3 {
        animation: none;
    }
}

/* ── Network Monitor Banner (shared across kiosk views) ── */
#network-monitor-banner {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 9999;
    text-align: center;
    font-family: "Noto Sans TC", "Microsoft JhengHei", sans-serif;
    font-size: 1rem;
    font-weight: 600;
    padding: 10px 16px;
    color: #fff;
    transform: translateY(-100%);
    opacity: 0;
    pointer-events: none;
    transition: transform 0.35s ease, opacity 0.35s ease, background-color 0.3s ease;
}
@media (prefers-reduced-motion: reduce) {
    #network-monitor-banner { transition: none; }
}
#network-monitor-banner.nm-visible {
    transform: translateY(0);
    opacity: 1;
    pointer-events: auto;
}
#network-monitor-banner.nm-offline { background-color: #dc2626; }
#network-monitor-banner.nm-online  { background-color: #16a34a; }