:root {
  --ys-red: #d61f26;
  --ys-red-dark: #b0191f;
  --ys-red-light: #e63946;
  --ys-black: #111214;
  --ys-dark-gray: #1a1b1e;
  --ys-medium-gray: #2a2b2e;
  --ys-light-gray: #f5f6f8;
  --ys-white: #ffffff;
  
  --ys-border: rgba(255, 255, 255, 0.10);
  --ys-border-light: rgba(255, 255, 255, 0.15);
  --ys-border-focus: rgba(214, 31, 38, 0.5);
  
  --shadow: 0 4px 12px rgba(0, 0, 0, 0.25);
  --shadow-large: 0 8px 24px rgba(0, 0, 0, 0.3);
  
  --font: system-ui, -apple-system, 'Segoe UI', Roboto, Arial, sans-serif;
  --font-size-xs: 12px;
  --font-size-sm: 13px;
  --font-size-base: 14px;
  --font-size-lg: 16px;
  --font-size-xl: 18px;
  --font-size-2xl: 26px;
  
  --spacing-xs: 4px;
  --spacing-sm: 8px;
  --spacing-md: 12px;
  --spacing-lg: 16px;
  --spacing-xl: 20px;
  
  --radius-sm: 14px;
  --radius-md: 16px;
  --radius-lg: 18px;
  
  --transition-fast: 150ms ease;
  --transition-base: 250ms ease;
}

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

html, body {
  height: 100%;
  -webkit-tap-highlight-color: transparent;
}

body {
  font-family: var(--font);
  font-size: var(--font-size-base);
  line-height: 1.5;
  background: var(--ys-black);
  color: var(--ys-white);
  height: 100vh;
  overflow: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Utility classes */
.hidden {
  display: none !important;
}

.visually-hidden {
  position: absolute !important;
  width: 1px !important;
  height: 1px !important;
  padding: 0 !important;
  margin: -1px !important;
  overflow: hidden !important;
  clip: rect(0, 0, 0, 0) !important;
  white-space: nowrap !important;
  border: 0 !important;
}

/* Loading states */
.loading {
  opacity: 0.7;
  cursor: progress !important;
  pointer-events: none;
}

/* Error and status states */
.error {
  color: var(--ys-red);
  font-weight: 800;
}

.success {
  color: #2ecc71;
}

.warning {
  color: #f1c40f;
}

/* Focus management */
:focus-visible {
  outline: 2px solid var(--ys-border-focus);
  outline-offset: 2px;
}

/* Disabled states */
:disabled,
[disabled] {
  opacity: 0.5;
  cursor: not-allowed !important;
  pointer-events: none;
}

/* Scrollbar styling */
::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}

::-webkit-scrollbar-track {
  background: rgba(0, 0, 0, 0.2);
  border-radius: 4px;
}

::-webkit-scrollbar-thumb {
  background: rgba(255, 255, 255, 0.15);
  border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
  background: rgba(255, 255, 255, 0.25);
}

/* Kiosk layout */
.kiosk-shell {
  height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--spacing-xl);
}

.card {
  background: var(--ys-dark-gray);
  border: 1px solid var(--ys-border);
  box-shadow: var(--shadow);
  border-radius: var(--radius-lg);
}

/* Buttons */
.btn {
  border: 0;
  background: var(--ys-red);
  color: var(--ys-white);
  padding: var(--spacing-lg) var(--spacing-xl);
  border-radius: var(--radius-md);
  font-weight: 700;
  font-size: var(--font-size-xl);
  cursor: pointer;
  box-shadow: var(--shadow);
  transition: all var(--transition-fast);
  min-height: 56px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  text-decoration: none;
  position: relative;
  overflow: hidden;
  white-space: nowrap;
  text-overflow: ellipsis;
  
  /* AUDIT FIX: User selection disabled for touch */
  user-select: none;
  -webkit-user-select: none;
  -webkit-touch-callout: none;
}

.btn:hover:not(:disabled) {
  background: var(--ys-red-light);
  transform: translateY(-1px);
}

.btn:active:not(:disabled) {
  background: var(--ys-red-dark);
  transform: translateY(0);
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.btn.secondary {
  background: transparent;
  border: 1px solid var(--ys-border);
}

.btn.secondary:hover:not(:disabled) {
  background: rgba(255, 255, 255, 0.05);
}

.btn.ghost {
  background: transparent;
  border: 1px dashed var(--ys-border);
}

.btn.ghost:hover:not(:disabled) {
  background: rgba(255, 255, 255, 0.03);
}

/* Logo and branding */
.logo-block {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-lg);
}

.logo {
  width: 120px;
  height: 120px;
  border-radius: 999px;
  object-fit: contain;
  background: #000;
  padding: var(--spacing-sm);
  border: 1px solid var(--ys-border);
  display: block;
}

.brand {
  font-size: var(--font-size-2xl);
  font-weight: 900;
  text-align: center;
}

.since {
  font-size: var(--font-size-sm);
  opacity: 0.85;
  text-align: center;
}

/* Welcome screen */
.welcome-box {
  width: min(520px, 92vw);
  padding: var(--spacing-xl);
  text-align: center;
}

.welcome-actions {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
  margin-top: var(--spacing-md);
}

.note {
  margin-top: var(--spacing-sm);
  font-size: var(--font-size-sm);
  opacity: 0.85;
}

.badge {
  display: inline-block;
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: 999px;
  border: 1px solid var(--ys-border);
  font-size: var(--font-size-xs);
  opacity: 0.9;
  background: rgba(255, 255, 255, 0.05);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 100%;
}

/* Menu layout */
.menu-layout {
  height: 100vh;
  display: grid;
  grid-template-columns: 240px 1fr 320px;
  gap: var(--spacing-md);
  padding: var(--spacing-md);
}

@media (max-width: 1024px) {
  .menu-layout {
    grid-template-columns: 200px 1fr 280px;
  }
}

/* Sidebar */
.sidebar,
.cart-panel,
.main-panel {
  border-radius: var(--radius-lg);
  border: 1px solid var(--ys-border);
  background: var(--ys-dark-gray);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  min-width: 0; /* Prevent flex overflow */
}

.sidebar-head,
.cart-head {
  padding: var(--spacing-md);
  border-bottom: 1px solid var(--ys-border);
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  flex-shrink: 0;
}

.sidebar-head img {
  width: 44px;
  height: 44px;
  border-radius: 999px;
  background: #000;
  padding: 6px;
  border: 1px solid var(--ys-border);
  flex-shrink: 0;
  display: block;
}

.sidebar-title {
  font-weight: 900;
  font-size: var(--font-size-lg);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.sidebar-sub {
  font-size: var(--font-size-xs);
  opacity: 0.85;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.sidebar-list {
  padding: var(--spacing-sm);
  overflow: auto;
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
  flex: 1;
}

.cat-btn {
  width: 100%;
  text-align: left;
  padding: var(--spacing-md);
  border-radius: var(--radius-sm);
  border: 1px solid var(--ys-border);
  background: transparent;
  color: var(--ys-white);
  cursor: pointer;
  font-weight: 700;
  min-height: 48px;
  transition: all var(--transition-fast);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  user-select: none;
  -webkit-user-select: none;
  -webkit-touch-callout: none;
}

.cat-btn:hover:not(.active) {
  background: rgba(255, 255, 255, 0.05);
}

.cat-btn.active {
  background: rgba(214, 31, 38, 0.15);
  border-color: rgba(214, 31, 38, 0.5);
}

/* Main panel */
.main-panel {
  overflow: hidden;
}

.item-grid {
  padding: var(--spacing-md);
  overflow: auto;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: var(--spacing-md);
  flex: 1;
  align-content: start;
}

.item-card {
  padding: var(--spacing-md);
  border-radius: var(--radius-lg);
  border: 1px solid var(--ys-border);
  background: #141518;
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
  height: 100%;
  min-height: 180px;
}

.item-name {
  font-weight: 900;
  font-size: 15px;
  line-height: 1.3;
  overflow: hidden;
  text-overflow: ellipsis;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  min-height: 2.6em;
}

.item-desc {
  font-size: var(--font-size-xs);
  opacity: 0.85;
  flex: 1;
  overflow: hidden;
  text-overflow: ellipsis;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  min-height: 3.9em;
}

.item-foot {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--spacing-sm);
  flex-shrink: 0;
}

.price {
  font-weight: 900;
  font-size: var(--font-size-lg);
  white-space: nowrap;
}

.add-btn {
  padding: var(--spacing-sm) var(--spacing-md);
  border-radius: var(--radius-sm);
  border: 0;
  background: var(--ys-red);
  color: #fff;
  font-weight: 900;
  cursor: pointer;
  min-height: 40px;
  min-width: 80px;
  transition: all var(--transition-fast);
  white-space: nowrap;
  user-select: none;
  -webkit-user-select: none;
}

.add-btn:hover:not(:disabled) {
  background: var(--ys-red-light);
}

.add-btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

/* Cart */
.cart-body {
  padding: var(--spacing-md);
  overflow: auto;
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
  flex: 1;
}

.cart-item {
  border: 1px solid var(--ys-border);
  border-radius: var(--radius-md);
  padding: var(--spacing-sm);
  background: #141518;
}

.cart-row {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: var(--spacing-sm);
}

.cart-name {
  font-weight: 900;
  font-size: var(--font-size-sm);
  flex: 1;
  overflow: hidden;
  text-overflow: ellipsis;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
}

.cart-meta {
  font-size: var(--font-size-xs);
  opacity: 0.85;
  margin-top: var(--spacing-xs);
  overflow: hidden;
  text-overflow: ellipsis;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
}

.qty-row {
  margin-top: var(--spacing-sm);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--spacing-sm);
}

.qty-btn {
  width: 38px;
  height: 38px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--ys-border);
  background: transparent;
  color: #fff;
  font-weight: 900;
  cursor: pointer;
  font-size: var(--font-size-lg);
  transition: all var(--transition-fast);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  user-select: none;
  -webkit-user-select: none;
}

.qty-btn:hover:not(:disabled) {
  background: rgba(255, 255, 255, 0.05);
}

.qty-btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.qty {
  font-weight: 900;
  font-size: var(--font-size-lg);
  min-width: 24px;
  text-align: center;
}

.total-box {
  padding: var(--spacing-md);
  border-top: 1px solid var(--ys-border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-shrink: 0;
}

.total-label {
  opacity: 0.85;
  font-size: var(--font-size-lg);
}

.total-val {
  font-weight: 900;
  font-size: var(--font-size-xl);
  white-space: nowrap;
}

.cart-actions {
  padding: var(--spacing-md);
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
  border-top: 1px solid var(--ys-border);
  flex-shrink: 0;
}

/* Form elements */
.textarea {
  width: 100%;
  min-height: 70px;
  padding: var(--spacing-sm) var(--spacing-md);
  border-radius: var(--radius-sm);
  border: 1px solid var(--ys-border);
  background: #0f1012;
  color: #fff;
  resize: vertical;
  font-family: var(--font);
  font-size: var(--font-size-base);
  transition: border-color var(--transition-fast);
}

.textarea:focus {
  border-color: var(--ys-border-focus);
}

.field {
  width: 100%;
  padding: var(--spacing-md);
  border-radius: var(--radius-sm);
  border: 1px solid var(--ys-border);
  background: #0f1012;
  color: #fff;
  font-size: 15px;
  font-family: var(--font);
  transition: border-color var(--transition-fast);
}

.field:focus {
  border-color: var(--ys-border-focus);
}

/* Modals */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.75);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--spacing-lg);
  z-index: 1000;
  backdrop-filter: blur(2px);
}

.modal {
  width: min(520px, 92vw);
  padding: var(--spacing-lg);
  max-height: 90vh;
  overflow-y: auto;
}

.modal h2 {
  margin: var(--spacing-xs) 0 var(--spacing-sm) 0;
  font-size: var(--font-size-xl);
  font-weight: 900;
}

.modal .row {
  display: flex;
  gap: var(--spacing-sm);
  flex-wrap: wrap;
}

.modal .row .btn {
  flex: 1;
  min-width: 160px;
}

/* PIN pad */
.pin-pad {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--spacing-sm);
  margin-top: var(--spacing-sm);
}

.pin-key {
  padding: var(--spacing-lg) 0;
  border-radius: var(--radius-md);
  border: 1px solid var(--ys-border);
  background: #0f1012;
  color: #fff;
  font-weight: 900;
  font-size: var(--font-size-xl);
  cursor: pointer;
  min-height: 56px;
  transition: all var(--transition-fast);
  display: flex;
  align-items: center;
  justify-content: center;
  
  /* AUDIT FIX: User selection disabled for touch */
  user-select: none;
  -webkit-user-select: none;
  -webkit-touch-callout: none;
}

.pin-key:hover:not(:disabled) {
  background: rgba(255, 255, 255, 0.05);
}

.pin-key:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.pin-screen {
  width: 100%;
  text-align: center;
  padding: var(--spacing-md);
  border-radius: var(--radius-sm);
  border: 1px solid var(--ys-border);
  background: #0f1012;
  font-weight: 900;
  letter-spacing: 6px;
  font-size: var(--font-size-xl);
  font-family: monospace;
  min-height: 56px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.small {
  font-size: var(--font-size-xs);
  opacity: 0.85;
}

/* Status messages */
.status-message {
  padding: 10px;
  margin-top: 10px;
  border-radius: 8px;
  font-size: 14px;
  border: 1px solid transparent;
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  min-height: 44px;
}

.status-message:empty {
  display: none;
}

.status-message.success {
  background: rgba(45, 206, 137, 0.15);
  color: #2ecc71;
  border-color: rgba(45, 206, 137, 0.3);
}

.status-message.error {
  background: rgba(231, 76, 60, 0.15);
  color: #e74c3c;
  border-color: rgba(231, 76, 60, 0.3);
}

.status-message.warning {
  background: rgba(241, 196, 15, 0.15);
  color: #f1c40f;
  border-color: rgba(241, 196, 15, 0.3);
}

.field-group {
  margin-bottom: 10px;
}

.field-group label {
  display: block;
  margin-bottom: 4px;
  font-weight: 600;
}

/* Touch device optimizations */
@media (hover: none) and (pointer: coarse) {
  .btn,
  .cat-btn,
  .add-btn,
  .pin-key,
  .qty-btn {
    min-height: 44px;
  }
  
  .btn {
    padding: var(--spacing-md) var(--spacing-lg);
  }
}

/* Responsive adjustments */
@media (max-width: 768px) {
  .menu-layout {
    grid-template-columns: 180px 1fr 280px;
    gap: 10px;
    padding: 10px;
  }
  
  .item-grid {
    grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
    gap: 10px;
    padding: 10px;
  }
  
  .btn {
    font-size: 16px;
    padding: 14px 18px;
    min-height: 52px;
  }
  
  .item-card {
    padding: 10px;
    min-height: 160px;
  }
  
  .item-name {
    font-size: 14px;
    -webkit-line-clamp: 2;
  }
  
  .item-desc {
    -webkit-line-clamp: 2;
    min-height: 2.6em;
  }
}

/* High contrast mode support */
@media (prefers-contrast: high) {
  :root {
    --ys-border: rgba(255, 255, 255, 0.5);
    --ys-border-light: rgba(255, 255, 255, 0.7);
  }
  
  .btn,
  .cat-btn,
  .add-btn,
  .pin-key,
  .qty-btn {
    border-width: 2px;
  }
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
  
  .btn,
  .cat-btn,
  .add-btn,
  .pin-key,
  .qty-btn {
    transition: none;
  }
}