/* ============================================
   Restaurant Order System - Mobile First CSS
   Theme: Dark Luxury (Black & Gold)
   ============================================ */

@import url("https://fonts.googleapis.com/css2?family=Noto+Sans+TC:wght@300;400;500;700&display=swap");

/* --- CSS Variables --- */
:root {
  --color-bg: #0d0d0d;
  --color-bg-card: #1a1a1a;
  --color-bg-elevated: #242424;
  --color-bg-overlay: rgba(0, 0, 0, 0.85);
  --color-gold: #c9a96e;
  --color-gold-light: #e0c992;
  --color-gold-dark: #a6884f;
  --color-text: #f0ece4;
  --color-text-secondary: #a8a29e;
  --color-text-muted: #6b6560;
  --color-border: #2a2520;
  --color-success: #4ade80;
  --color-error: #f87171;
  --color-surcharge: #e0c992;
  --font-family: "Noto Sans TC", -apple-system, BlinkMacSystemFont, sans-serif;
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-full: 9999px;
  --shadow-card: 0 2px 8px rgba(0, 0, 0, 0.4);
  --shadow-elevated: 0 8px 32px rgba(0, 0, 0, 0.6);
  --transition-fast: 0.2s ease;
  --transition-normal: 0.3s ease;
  --safe-bottom: 100px;
}

/* --- Reset & Base --- */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-family);
  background-color: var(--color-bg);
  color: var(--color-text);
  line-height: 1.6;
  min-height: 100vh;
  overflow-x: hidden;
  padding-bottom: var(--safe-bottom);
  -webkit-font-smoothing: antialiased;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
  color: inherit;
}

/* --- Header --- */
.order-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: linear-gradient(
    180deg,
    var(--color-bg) 0%,
    rgba(13, 13, 13, 0.95) 100%
  );
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  padding: 16px 16px 12px;
  border-bottom: 1px solid var(--color-border);
}

.header-brand {
  text-align: center;
  margin-bottom: 8px;
}

.header-brand h1 {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-gold);
  letter-spacing: 2px;
}

.header-brand .brand-sub {
  font-size: 0.7rem;
  color: var(--color-text-secondary);
  letter-spacing: 4px;
  text-transform: uppercase;
  margin-top: 2px;
}

.table-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--color-bg-elevated);
  border: 1px solid var(--color-gold-dark);
  border-radius: var(--radius-full);
  padding: 4px 14px;
  font-size: 0.8rem;
  color: var(--color-gold-light);
  margin: 0 auto;
}

.table-badge .table-number {
  font-weight: 700;
  font-size: 0.9rem;
}

.header-info {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 8px;
}

/* --- Category Tabs --- */
.category-tabs {
  position: sticky;
  top: 88px;
  z-index: 90;
  background: var(--color-bg);
  padding: 12px 0;
  border-bottom: 1px solid var(--color-border);
}

.category-tabs-inner {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  padding: 0 16px;
  scrollbar-width: none;
  -ms-overflow-style: none;
  scroll-snap-type: x mandatory;
}

.category-tabs-inner::-webkit-scrollbar {
  display: none;
}

.category-tab {
  flex-shrink: 0;
  padding: 8px 16px;
  border-radius: var(--radius-full);
  font-size: 0.85rem;
  font-weight: 500;
  white-space: nowrap;
  color: var(--color-text-secondary);
  background: var(--color-bg-card);
  border: 1px solid transparent;
  transition: all var(--transition-fast);
  scroll-snap-align: start;
}

.category-tab:active {
  transform: scale(0.95);
}

.category-tab.active {
  color: var(--color-bg);
  background: var(--color-gold);
  border-color: var(--color-gold);
  font-weight: 700;
}

.category-tab .tab-emoji {
  margin-right: 4px;
}

/* --- Menu Section --- */
.menu-container {
  padding: 16px;
}

.menu-section {
  margin-bottom: 24px;
}

.menu-section.hidden {
  display: none;
}

.section-title {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--color-gold);
  margin-bottom: 12px;
  padding-left: 4px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.section-title .emoji {
  font-size: 1.2rem;
}

/* --- Menu Item Card --- */
.menu-item {
  display: flex;
  gap: 12px;
  background: var(--color-bg-card);
  border-radius: var(--radius-md);
  padding: 12px;
  margin-bottom: 10px;
  border: 1px solid var(--color-border);
  transition: border-color var(--transition-fast);
}

.menu-item.in-cart {
  border-color: var(--color-gold-dark);
}

.menu-item-image {
  width: 80px;
  height: 80px;
  flex-shrink: 0;
  border-radius: var(--radius-sm);
  background: var(--color-bg-elevated);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2rem;
  overflow: hidden;
}

.menu-item-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.menu-item-info {
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.menu-item-name {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--color-text);
  line-height: 1.3;
}

.menu-item-desc {
  font-size: 0.75rem;
  color: var(--color-text-secondary);
  line-height: 1.4;
  margin-top: 2px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.menu-item-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: 8px;
}

.menu-item-price {
  font-size: 0.85rem;
  font-weight: 700;
}

.price-included {
  color: var(--color-success);
}

.price-surcharge {
  color: var(--color-surcharge);
}

/* --- Quantity Controls --- */
.qty-controls {
  display: flex;
  align-items: center;
  gap: 2px;
}

.qty-btn {
  width: 32px;
  height: 32px;
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  font-weight: 700;
  transition: all var(--transition-fast);
}

.qty-btn:active {
  transform: scale(0.9);
}

.qty-btn-minus {
  background: var(--color-bg-elevated);
  color: var(--color-text-secondary);
  border: 1px solid var(--color-border);
}

.qty-btn-plus {
  background: var(--color-gold);
  color: var(--color-bg);
}

.qty-btn-plus:active {
  background: var(--color-gold-light);
}

.qty-btn.disabled {
  opacity: 0.3;
  pointer-events: none;
}

.qty-value {
  width: 28px;
  text-align: center;
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--color-gold-light);
}

.qty-add-btn {
  padding: 6px 16px;
  border-radius: var(--radius-full);
  background: var(--color-gold);
  color: var(--color-bg);
  font-size: 0.8rem;
  font-weight: 700;
  transition: all var(--transition-fast);
}

.qty-add-btn:active {
  transform: scale(0.95);
  background: var(--color-gold-light);
}

/* --- Bottom Cart Bar --- */
.cart-bar {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 200;
  background: linear-gradient(
    180deg,
    rgba(13, 13, 13, 0) 0%,
    var(--color-bg) 20%
  );
  padding: 20px 16px 16px;
  pointer-events: none;
}

.cart-bar-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: var(--color-gold);
  border-radius: var(--radius-lg);
  padding: 14px 20px;
  pointer-events: auto;
  box-shadow: var(--shadow-elevated);
  transition:
    transform var(--transition-normal),
    opacity var(--transition-normal);
  cursor: pointer;
}

.cart-bar.empty .cart-bar-inner {
  transform: translateY(120%);
  opacity: 0;
  pointer-events: none;
}

.cart-bar-left {
  display: flex;
  align-items: center;
  gap: 10px;
}

.cart-icon-wrap {
  position: relative;
  font-size: 1.3rem;
}

.cart-badge {
  position: absolute;
  top: -6px;
  right: -8px;
  background: var(--color-error);
  color: #fff;
  font-size: 0.65rem;
  font-weight: 700;
  width: 18px;
  height: 18px;
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  line-height: 1;
}

.cart-bar-text {
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--color-bg);
}

.cart-bar-total {
  font-size: 1rem;
  font-weight: 700;
  color: var(--color-bg);
}

/* --- Cart Drawer --- */
.cart-overlay {
  position: fixed;
  inset: 0;
  z-index: 300;
  background: var(--color-bg-overlay);
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-normal);
}

.cart-overlay.open {
  opacity: 1;
  visibility: visible;
}

.cart-drawer {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 310;
  background: var(--color-bg-card);
  border-radius: var(--radius-lg) var(--radius-lg) 0 0;
  max-height: 85vh;
  display: flex;
  flex-direction: column;
  transform: translateY(100%);
  transition: transform var(--transition-normal) cubic-bezier(0.32, 0.72, 0, 1);
}

.cart-drawer.open {
  transform: translateY(0);
}

.cart-drawer-handle {
  width: 36px;
  height: 4px;
  background: var(--color-text-muted);
  border-radius: var(--radius-full);
  margin: 10px auto;
  flex-shrink: 0;
}

.cart-drawer-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 8px 20px 16px;
  border-bottom: 1px solid var(--color-border);
  flex-shrink: 0;
}

.cart-drawer-title {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--color-gold);
}

.cart-clear-btn {
  font-size: 0.8rem;
  color: var(--color-text-muted);
  padding: 4px 8px;
}

.cart-drawer-body {
  flex: 1;
  overflow-y: auto;
  padding: 16px 20px;
  overscroll-behavior: contain;
}

.cart-empty-msg {
  text-align: center;
  padding: 40px 0;
  color: var(--color-text-muted);
  font-size: 0.9rem;
}

.cart-empty-msg .empty-icon {
  font-size: 2.5rem;
  margin-bottom: 12px;
}

/* --- Cart Item --- */
.cart-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 0;
  border-bottom: 1px solid var(--color-border);
}

.cart-item:last-child {
  border-bottom: none;
}

.cart-item-emoji {
  font-size: 1.5rem;
  width: 40px;
  text-align: center;
  flex-shrink: 0;
}

.cart-item-info {
  flex: 1;
  min-width: 0;
}

.cart-item-name {
  font-size: 0.9rem;
  font-weight: 600;
}

.cart-item-price {
  font-size: 0.8rem;
  color: var(--color-text-secondary);
  margin-top: 2px;
}

.cart-item-qty {
  display: flex;
  align-items: center;
  gap: 2px;
  flex-shrink: 0;
}

.cart-item-qty .qty-btn {
  width: 28px;
  height: 28px;
  font-size: 0.9rem;
}

.cart-item-qty .qty-value {
  width: 24px;
  font-size: 0.85rem;
}

.cart-item-subtotal {
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--color-gold-light);
  min-width: 60px;
  text-align: right;
  flex-shrink: 0;
}

/* --- Cart Footer --- */
.cart-drawer-footer {
  padding: 16px 20px;
  border-top: 1px solid var(--color-border);
  flex-shrink: 0;
  background: var(--color-bg-card);
}

.cart-summary {
  margin-bottom: 12px;
}

.cart-summary-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.85rem;
  color: var(--color-text-secondary);
  margin-bottom: 6px;
}

.cart-summary-row.total {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--color-gold);
  padding-top: 8px;
  border-top: 1px solid var(--color-border);
  margin-top: 4px;
}

.cart-note-input {
  width: 100%;
  background: var(--color-bg-elevated);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: 10px 12px;
  font-family: var(--font-family);
  font-size: 0.85rem;
  color: var(--color-text);
  resize: none;
  margin-bottom: 12px;
  outline: none;
  transition: border-color var(--transition-fast);
}

.cart-note-input::placeholder {
  color: var(--color-text-muted);
}

.cart-note-input:focus {
  border-color: var(--color-gold-dark);
}

.submit-order-btn {
  width: 100%;
  padding: 14px;
  border-radius: var(--radius-md);
  background: var(--color-gold);
  color: var(--color-bg);
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: 1px;
  transition: all var(--transition-fast);
}

.submit-order-btn:active {
  transform: scale(0.98);
  background: var(--color-gold-light);
}

.submit-order-btn:disabled {
  opacity: 0.5;
  pointer-events: none;
}

.submit-order-btn.loading {
  pointer-events: none;
  opacity: 0.7;
}

/* --- Order Status Toast --- */
.toast {
  position: fixed;
  top: 20px;
  left: 50%;
  transform: translateX(-50%) translateY(-120%);
  z-index: 500;
  padding: 14px 24px;
  border-radius: var(--radius-md);
  font-size: 0.9rem;
  font-weight: 600;
  box-shadow: var(--shadow-elevated);
  transition: transform 0.4s cubic-bezier(0.32, 0.72, 0, 1);
  max-width: 90vw;
  text-align: center;
}

.toast.show {
  transform: translateX(-50%) translateY(0);
}

.toast.success {
  background: #166534;
  color: #bbf7d0;
  border: 1px solid #22c55e;
}

.toast.error {
  background: #7f1d1d;
  color: #fecaca;
  border: 1px solid #ef4444;
}

/* --- Order Success Overlay --- */
.order-success-overlay {
  position: fixed;
  inset: 0;
  z-index: 400;
  background: var(--color-bg-overlay);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-normal);
}

.order-success-overlay.show {
  opacity: 1;
  visibility: visible;
}

.order-success-card {
  background: var(--color-bg-card);
  border: 1px solid var(--color-gold-dark);
  border-radius: var(--radius-lg);
  padding: 40px 32px;
  text-align: center;
  max-width: 320px;
  width: 90%;
  transform: scale(0.9);
  transition: transform var(--transition-normal);
}

.order-success-overlay.show .order-success-card {
  transform: scale(1);
}

.success-icon {
  font-size: 3rem;
  margin-bottom: 16px;
}

.success-title {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--color-gold);
  margin-bottom: 8px;
}

.success-message {
  font-size: 0.85rem;
  color: var(--color-text-secondary);
  line-height: 1.6;
  margin-bottom: 20px;
}

.success-order-id {
  font-size: 0.8rem;
  color: var(--color-text-muted);
  background: var(--color-bg-elevated);
  padding: 8px 16px;
  border-radius: var(--radius-sm);
  margin-bottom: 20px;
  display: inline-block;
}

.success-close-btn {
  padding: 12px 32px;
  border-radius: var(--radius-md);
  background: var(--color-gold);
  color: var(--color-bg);
  font-size: 0.9rem;
  font-weight: 700;
}

/* --- Loading Spinner --- */
.spinner {
  display: inline-block;
  width: 18px;
  height: 18px;
  border: 2px solid transparent;
  border-top-color: currentColor;
  border-radius: 50%;
  animation: spin 0.6s linear infinite;
  vertical-align: middle;
  margin-right: 6px;
}

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

/* --- Add-to-cart animation --- */
@keyframes pop {
  0% {
    transform: scale(1);
  }
  50% {
    transform: scale(1.2);
  }
  100% {
    transform: scale(1);
  }
}

.cart-badge.pop {
  animation: pop 0.3s ease;
}

/* --- Scrollbar styling --- */
.cart-drawer-body::-webkit-scrollbar {
  width: 4px;
}

.cart-drawer-body::-webkit-scrollbar-track {
  background: transparent;
}

.cart-drawer-body::-webkit-scrollbar-thumb {
  background: var(--color-text-muted);
  border-radius: var(--radius-full);
}

/* ============================================
   Breakpoint: 480px (Large Phones)
   ============================================ */
@media (min-width: 480px) {
  .menu-container {
    padding: 20px 24px;
  }

  .menu-item {
    padding: 14px;
    gap: 14px;
  }

  .menu-item-image {
    width: 90px;
    height: 90px;
  }

  .menu-item-name {
    font-size: 1rem;
  }

  .menu-item-desc {
    font-size: 0.8rem;
  }

  .cart-bar {
    padding: 20px 24px 16px;
  }
}

/* ============================================
   Breakpoint: 768px (Tablet)
   ============================================ */
@media (min-width: 768px) {
  .order-header {
    padding: 20px 32px 14px;
  }

  .header-brand h1 {
    font-size: 1.5rem;
    letter-spacing: 4px;
  }

  .header-brand .brand-sub {
    font-size: 0.8rem;
  }

  .category-tabs {
    top: 98px;
  }

  .category-tabs-inner {
    padding: 0 32px;
    justify-content: center;
  }

  .category-tab {
    padding: 10px 24px;
    font-size: 0.9rem;
  }

  .menu-container {
    padding: 24px 32px;
    max-width: 720px;
    margin: 0 auto;
  }

  .menu-item {
    padding: 16px;
    gap: 16px;
  }

  .menu-item-image {
    width: 100px;
    height: 100px;
  }

  .menu-item-name {
    font-size: 1.05rem;
  }

  .cart-bar {
    padding: 20px 32px 20px;
  }

  .cart-bar-inner {
    max-width: 500px;
    margin: 0 auto;
    padding: 16px 24px;
  }

  .cart-drawer {
    max-width: 480px;
    left: auto;
    right: 0;
    max-height: 100vh;
    border-radius: var(--radius-lg) 0 0 0;
    top: 0;
  }

  .cart-overlay.open + .cart-drawer.open {
    transform: translateX(0);
  }

  .cart-drawer-body {
    padding: 20px 24px;
  }
}

/* ============================================
   Breakpoint: 1024px (Desktop)
   ============================================ */
@media (min-width: 1024px) {
  .header-brand h1 {
    font-size: 1.6rem;
    letter-spacing: 6px;
  }

  .menu-container {
    max-width: 800px;
    padding: 32px;
  }

  .menu-item {
    padding: 18px;
    transition:
      border-color var(--transition-fast),
      box-shadow var(--transition-fast);
  }

  .menu-item:hover {
    border-color: var(--color-gold-dark);
    box-shadow: 0 4px 16px rgba(201, 169, 110, 0.1);
  }

  .menu-item-image {
    width: 110px;
    height: 110px;
  }

  .menu-item-name {
    font-size: 1.1rem;
  }

  .menu-item-desc {
    font-size: 0.85rem;
    -webkit-line-clamp: 3;
  }

  .qty-btn {
    width: 36px;
    height: 36px;
    transition: background var(--transition-fast);
  }

  .qty-btn-minus:hover {
    background: var(--color-border);
  }

  .qty-btn-plus:hover {
    background: var(--color-gold-light);
  }

  .cart-bar-inner {
    max-width: 560px;
    border-radius: var(--radius-lg);
    transition: transform var(--transition-fast);
  }

  .cart-bar-inner:hover {
    transform: translateY(-2px);
  }

  .cart-drawer {
    max-width: 420px;
  }

  .submit-order-btn {
    transition:
      background var(--transition-fast),
      transform var(--transition-fast);
  }

  .submit-order-btn:hover {
    background: var(--color-gold-light);
  }
}