/* Design System & Tokens */
:root {
  /* Default Theme (Light Fallback) */
  --bg-color: #f4f5f8;
  --text-color: #1a1a1c;
  --hint-color: #7b7b80;
  --link-color: #e4002b;
  --brand-color: #e4002b;
  --brand-color-hover: #b80020;
  --secondary-bg-color: #ffffff;
  
  --card-bg: rgba(255, 255, 255, 0.8);
  --card-border: rgba(0, 0, 0, 0.06);
  --card-shadow: 0 4px 18px rgba(0, 0, 0, 0.03);
  --glass-bg: rgba(255, 255, 255, 0.75);
  --glass-border: rgba(0, 0, 0, 0.08);
  
  --font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --border-radius-lg: 20px;
  --border-radius-md: 14px;
  --border-radius-sm: 8px;
  --transition-normal: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-bounce: 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

/* Dark Theme Override */
html.dark, :root[theme="dark"] {
  --bg-color: #0f0f11;
  --text-color: #f1f1f5;
  --hint-color: #8c8c93;
  --secondary-bg-color: #18181c;
  
  --card-bg: rgba(24, 24, 28, 0.85);
  --card-border: rgba(255, 255, 255, 0.05);
  --card-shadow: 0 4px 18px rgba(0, 0, 0, 0.25);
  --glass-bg: rgba(24, 24, 28, 0.8);
  --glass-border: rgba(255, 255, 255, 0.06);
}

/* Map Telegram System Colors if present */
:root {
  --theme-bg: var(--tg-theme-bg-color, var(--bg-color));
  --theme-text: var(--tg-theme-text-color, var(--text-color));
  --theme-hint: var(--tg-theme-hint-color, var(--hint-color));
  --theme-link: var(--tg-theme-link-color, var(--link-color));
  --theme-btn: var(--tg-theme-button-color, var(--brand-color));
  --theme-btn-text: var(--tg-theme-button-text-color, #ffffff);
  --theme-sec-bg: var(--tg-theme-secondary-bg-color, var(--secondary-bg-color));
}

/* Global Reset */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  -webkit-tap-highlight-color: transparent;
}

body {
  font-family: var(--font-family);
  background-color: var(--theme-bg);
  color: var(--theme-text);
  overflow-x: hidden;
  line-height: 1.4;
  padding-bottom: 90px; /* Leave space for sticky checkout footer */
}

/* Typography Customization */
h1, h2, h3, .brand-kfc {
  font-family: 'Outfit', var(--font-family);
  font-weight: 700;
}

/* App Layout */
#app {
  max-width: 600px;
  margin: 0 auto;
  min-height: 100vh;
  position: relative;
}

/* App Header styling */
.app-header {
  background: linear-gradient(135deg, #161618 0%, var(--brand-color) 100%);
  color: #ffffff;
  padding: 24px 18px 28px 18px;
  border-bottom-left-radius: 28px;
  border-bottom-right-radius: 28px;
  box-shadow: 0 8px 24px rgba(228, 0, 43, 0.15);
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 16px;
}

.user-profile {
  display: flex;
  align-items: center;
  gap: 12px;
}

.user-avatar {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background-color: rgba(255, 255, 255, 0.2);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 600;
  font-size: 1.1rem;
  border: 2px solid rgba(255, 255, 255, 0.4);
  text-transform: uppercase;
}

.user-info h2 {
  font-size: 1.05rem;
  margin-bottom: 4px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 170px;
}

.user-meta {
  display: flex;
  gap: 6px;
}

.platoon-badge, .balance-badge {
  font-size: 0.75rem;
  padding: 3px 8px;
  border-radius: var(--border-radius-sm);
  font-weight: 600;
  backdrop-filter: blur(4px);
}

.platoon-badge {
  background-color: rgba(255, 255, 255, 0.15);
  border: 1px solid rgba(255, 255, 255, 0.1);
}

.balance-badge {
  background-color: rgba(255, 255, 255, 0.25);
  border: 1px solid rgba(255, 255, 255, 0.15);
}

.brand-logo {
  text-align: right;
  display: flex;
  flex-direction: column;
}

.brand-kfc {
  font-size: 1.5rem;
  letter-spacing: 1px;
  line-height: 1.1;
  text-shadow: 1px 1px 3px rgba(0,0,0,0.2);
}

.brand-delivery {
  font-size: 0.65rem;
  text-transform: uppercase;
  letter-spacing: 2px;
  opacity: 0.9;
}

/* Platoon Input Banner */
.platoon-prompt-banner {
  margin: 0 16px 16px 16px;
  background-color: rgba(228, 0, 43, 0.08);
  border: 1.5px dashed var(--brand-color);
  border-radius: var(--border-radius-md);
  padding: 14px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  animation: fadeIn 0.4s ease;
}

.prompt-content {
  display: flex;
  align-items: center;
  gap: 8px;
}

.prompt-text {
  font-size: 0.85rem;
  font-weight: 500;
}

.prompt-input-group {
  display: flex;
  gap: 8px;
}

.prompt-input-group input {
  flex: 1;
  background-color: var(--theme-sec-bg);
  border: 1px solid var(--card-border);
  color: var(--theme-text);
  padding: 8px 12px;
  border-radius: var(--border-radius-sm);
  outline: none;
  font-size: 0.85rem;
}

.prompt-input-group button {
  background-color: var(--brand-color);
  color: #ffffff;
  border: none;
  padding: 8px 16px;
  border-radius: var(--border-radius-sm);
  font-weight: 600;
  cursor: pointer;
  font-size: 0.85rem;
}

.prompt-input-group button:hover {
  background-color: var(--brand-color-hover);
}

/* Main Container */
.menu-container {
  padding: 0 16px;
}

.section-title {
  font-size: 1.15rem;
  margin-bottom: 12px;
  opacity: 0.9;
  letter-spacing: 0.5px;
}

/* Product Grid */
.product-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
}

/* Product Card */
.product-card {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--border-radius-lg);
  padding: 10px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  box-shadow: var(--card-shadow);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
  backdrop-filter: blur(8px);
}

.product-card:hover {
  transform: translateY(-2px);
}

.product-img-wrapper {
  width: 100%;
  aspect-ratio: 1.1;
  border-radius: var(--border-radius-md);
  overflow: hidden;
  margin-bottom: 8px;
  background-color: rgba(0, 0, 0, 0.03);
}

.product-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.3s ease;
}

.product-card:hover .product-img {
  transform: scale(1.05);
}

.product-name {
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: 8px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  height: 2.4em;
  color: var(--theme-text);
}

.product-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: 4px;
}

.product-price {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--theme-text);
}

/* Button & Counter Interactions */
.card-action {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: flex-end;
}

.btn-add {
  background-color: var(--brand-color);
  color: #ffffff;
  border: none;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  font-size: 1.15rem;
  font-weight: 600;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  box-shadow: 0 4px 10px rgba(228, 0, 43, 0.2);
  transition: var(--transition-bounce);
}

.btn-add:hover {
  background-color: var(--brand-color-hover);
  transform: scale(1.08);
}

.counter-container {
  display: flex;
  align-items: center;
  background-color: rgba(228, 0, 43, 0.08);
  border: 1px solid rgba(228, 0, 43, 0.15);
  border-radius: 30px;
  padding: 2px;
  gap: 10px;
  animation: popIn 0.25s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.btn-qty {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  border: none;
  font-weight: 700;
  font-size: 0.95rem;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: var(--transition-normal);
}

.btn-qty.minus {
  background-color: transparent;
  color: var(--brand-color);
}

.btn-qty.plus {
  background-color: var(--brand-color);
  color: #ffffff;
  box-shadow: 0 2px 6px rgba(228, 0, 43, 0.15);
}

.qty-val {
  font-size: 0.85rem;
  font-weight: 700;
  min-width: 14px;
  text-align: center;
}

/* Fallback Checkout Footer (Browser Testing) */
.fallback-checkout-bar {
  position: fixed;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 100%;
  max-width: 600px;
  background: var(--glass-bg);
  border-top: 1px solid var(--glass-border);
  box-shadow: 0 -8px 30px rgba(0, 0, 0, 0.06);
  backdrop-filter: blur(15px);
  padding: 16px 20px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  z-index: 100;
  animation: slideUp 0.3s ease;
}

.checkout-info {
  display: flex;
  flex-direction: column;
}

.checkout-count {
  font-size: 0.75rem;
  color: var(--theme-hint);
}

.checkout-total {
  font-size: 1.15rem;
  font-weight: 700;
}

.fallback-order-btn {
  background-color: var(--theme-btn);
  color: var(--theme-btn-text);
  border: none;
  padding: 12px 24px;
  border-radius: var(--border-radius-md);
  font-weight: 700;
  font-size: 0.95rem;
  cursor: pointer;
  box-shadow: 0 4px 14px rgba(228, 0, 43, 0.2);
  transition: var(--transition-normal);
}

.fallback-order-btn:hover {
  transform: translateY(-1px);
  box-shadow: 0 6px 20px rgba(228, 0, 43, 0.3);
}

/* Toast Notifications */
.toast-container {
  position: fixed;
  top: 20px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 1000;
  display: flex;
  flex-direction: column;
  gap: 8px;
  width: 90%;
  max-width: 320px;
  pointer-events: none;
}

.toast {
  background: rgba(30, 30, 32, 0.9);
  color: #ffffff;
  padding: 12px 18px;
  border-radius: var(--border-radius-md);
  font-size: 0.85rem;
  font-weight: 500;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.15);
  display: flex;
  justify-content: space-between;
  align-items: center;
  backdrop-filter: blur(4px);
  animation: slideInDown 0.3s var(--transition-bounce);
  pointer-events: auto;
}

.toast.error {
  border-left: 4px solid var(--brand-color);
}

.toast.success {
  border-left: 4px solid #34c759;
}

/* Skeletons loader styling */
.skeleton-card {
  background-color: var(--theme-sec-bg);
  border-radius: var(--border-radius-lg);
  border: 1px solid var(--card-border);
  padding: 10px;
  height: 220px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  position: relative;
  overflow: hidden;
}

.skeleton-card::after {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.08), transparent);
  animation: shimmer 1.5s infinite;
}

.skeleton-img {
  width: 100%;
  aspect-ratio: 1.1;
  border-radius: var(--border-radius-md);
  background-color: rgba(120, 120, 120, 0.1);
}

.skeleton-title {
  height: 14px;
  border-radius: 4px;
  width: 70%;
  background-color: rgba(120, 120, 120, 0.1);
}

.skeleton-price {
  height: 14px;
  border-radius: 4px;
  width: 40%;
  background-color: rgba(120, 120, 120, 0.1);
}

/* Animations */
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(6px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes popIn {
  from { transform: scale(0.85); opacity: 0; }
  to { transform: scale(1); opacity: 1; }
}

@keyframes slideUp {
  from { transform: translate(-50%, 100%); }
  to { transform: translate(-50%, 0); }
}

@keyframes slideInDown {
  from { transform: translateY(-40px); opacity: 0; }
  to { transform: translateY(0); opacity: 1; }
}

@keyframes shimmer {
  0% { transform: translateX(-100%); }
  100% { transform: translateX(100%); }
}

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

/* Auth Error Screen Overlay */
.auth-error-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: var(--theme-bg);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 30px;
  text-align: center;
  z-index: 10000;
  animation: fadeIn 0.4s ease-out;
}

.auth-error-card {
  background: var(--theme-sec-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--border-radius-lg);
  padding: 32px 24px;
  max-width: 400px;
  box-shadow: var(--card-shadow);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
  animation: popIn 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.auth-error-icon {
  font-size: 48px;
  background: rgba(228, 0, 43, 0.1);
  color: var(--brand-color);
  width: 80px;
  height: 80px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 8px;
}

.auth-error-title {
  font-size: 20px;
  color: var(--theme-text);
  margin-bottom: 4px;
}

.auth-error-desc {
  font-size: 14px;
  color: var(--theme-hint);
  line-height: 1.5;
}

.auth-error-btn {
  margin-top: 8px;
  background-color: var(--brand-color);
  color: #ffffff;
  border: none;
  padding: 12px 24px;
  font-weight: 600;
  border-radius: var(--border-radius-md);
  cursor: pointer;
  transition: var(--transition-normal);
  font-size: 14px;
}

.auth-error-btn:hover {
  background-color: var(--brand-color-hover);
}