/* ==========================================================================
   SylhetBites - Ultra-Premium Production Stylesheet
   Author: Rizwan Rahim Chowdhury
   Version: 1.0.0
   Description: World-class, mobile-first, highly optimized CSS for Cloudflare Pages.
   Features: Glassmorphism, CSS Variables, Dark Mode, App-like UI, Fluid Typography.
   ========================================================================== */

/* --- 1. CSS Variables & Theme Configuration --- */
:root {
  /* Color Palette - Inspired by premium food apps (Foodpanda/Apple) */
  --color-primary: #d70f64;       /* Foodpanda vibrant pink/red */
  --color-primary-hover: #b90c55;
  --color-primary-light: rgba(215, 15, 100, 0.08);
  --color-secondary: #0f172a;     /* Deep elegant dark */
  --color-accent: #f59e0b;        /* Warm gold for ratings/badges */
  --color-success: #10b981;
  
  /* Light Theme Defaults */
  --bg-main: #fcfcfd;
  --bg-surface: #ffffff;
  --bg-glass: rgba(255, 255, 255, 0.85);
  --text-main: #111827;
  --text-muted: #6b7280;
  --border-color: #e5e7eb;
  
  /* Shadows - Soft, Apple-like elevation */
  --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.02);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.05);
  --shadow-lg: 0 12px 24px rgba(0, 0, 0, 0.08);
  --shadow-hover: 0 20px 40px rgba(0, 0, 0, 0.12);
  
  /* Typography */
  --font-sans: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  
  /* Border Radius - Modern rounded UI */
  --radius-sm: 8px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --radius-pill: 9999px;
  
  /* Spacing & Layout */
  --space-xs: 4px;
  --space-sm: 8px;
  --space-md: 16px;
  --space-lg: 24px;
  --space-xl: 40px;
  --space-2xl: 64px;
  --max-width: 1200px;
  
  /* Transitions */
  --transition-fast: 0.15s ease;
  --transition-normal: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-bounce: 0.5s cubic-bezier(0.34, 1.56, 0.64, 1);
}

/* --- Dark Mode Auto-Switch --- */
@media (prefers-color-scheme: dark) {
  :root {
    --bg-main: #0b0f19;
    --bg-surface: #131b2c;
    --bg-glass: rgba(11, 15, 25, 0.85);
    --text-main: #f8fafc;
    --text-muted: #94a3b8;
    --border-color: #1e293b;
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.2);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 12px 24px rgba(0, 0, 0, 0.4);
    --shadow-hover: 0 20px 40px rgba(0, 0, 0, 0.5);
    --color-primary-light: rgba(215, 15, 100, 0.15);
  }
}

/* --- 2. CSS Reset & Base Styles --- */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-family: var(--font-sans);
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  background-color: var(--bg-main);
  color: var(--text-main);
  line-height: 1.5;
}

body {
  overflow-x: hidden;
}

a {
  text-decoration: none;
  color: inherit;
  transition: var(--transition-normal);
}

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

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

button:focus-visible, a:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 4px;
}

/* --- 3. Layout Utilities --- */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-md);
}

@media (min-width: 768px) {
  .container { padding: 0 var(--space-lg); }
}

@media (min-width: 1024px) {
  .container { padding: 0 var(--space-xl); }
}

/* --- 4. Animations --- */
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes float {
  0% { transform: translateY(0px); }
  50% { transform: translateY(-10px); }
  100% { transform: translateY(0px); }
}

/* --- 5. Components --- */

/* Navbar (Glassmorphism) */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  background: var(--bg-glass);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-color);
  z-index: 1000;
  transition: var(--transition-normal);
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-md);
}

.brand {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-main);
  letter-spacing: -0.5px;
}

.nav-logo {
  height: 40px;
  width: 40px;
  object-fit: contain;
}

.nav-links {
  display: none; /* Mobile first: hidden by default */
  list-style: none;
  gap: var(--space-lg);
}
.nav-links.active {
  display: flex;
  flex-direction: column;
  position: absolute;
  top: 72px;
  left: 0;
  width: 100%;
  background: var(--bg-surface);
  padding: 20px;
  gap: 16px;
  box-shadow: var(--shadow-lg);
  z-index: 999;
}
.nav-links a {
  font-weight: 500;
  color: var(--text-muted);
  font-size: 0.95rem;
  position: relative;
}

.nav-links a:hover, .nav-links a.active {
  color: var(--color-primary);
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0%;
  height: 2px;
  background-color: var(--color-primary);
  transition: var(--transition-normal);
  border-radius: var(--radius-pill);
}

.nav-links a:hover::after, .nav-links a.active::after {
  width: 100%;
}

.nav-cta-btn {
  display: none;
  background-color: var(--color-primary);
  color: #ffffff !important;
  padding: 10px 24px;
  border-radius: var(--radius-pill);
  font-weight: 600;
  font-size: 0.95rem;
  box-shadow: 0 4px 14px rgba(215, 15, 100, 0.3);
  transition: var(--transition-normal);
}

.nav-cta-btn:hover {
  background-color: var(--color-primary-hover);
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(215, 15, 100, 0.4);
}

/* Mobile Menu Button */
.mobile-menu-btn {
  display: flex;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 5px;
}

.mobile-menu-btn span {
  display: block;
  width: 24px;
  height: 2px;
  background-color: var(--text-main);
  border-radius: var(--radius-pill);
  transition: var(--transition-normal);
}

/* Hero Section */
.hero-section {
  padding-top: 104px; /* Account for sticky nav */
  padding-bottom: var(--space-2xl);
  position: relative;
  overflow: hidden;
}

.bg-watermark {
  position: absolute;
  top: -10%;
  right: -5%;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, var(--color-primary-light) 0%, transparent 70%);
  border-radius: 50%;
  z-index: -1;
  filter: blur(40px);
}

.hero-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-xl);
  align-items: center;
  animation: fadeInUp 0.8s ease-out;
}

.product-image-container {
  position: relative;
  width: 100%;
  max-width: 500px;
  margin: 0 auto;
}

.main-product-img {
  width: 100%;
  height: auto;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-hover);
  animation: float 6s ease-in-out infinite;
  object-fit: cover;
}

.promo-badge {
  position: absolute;
  top: -20px;
  right: -20px;
  width: 100px;
  filter: drop-shadow(0 4px 8px rgba(0,0,0,0.15));
  animation: float 4s ease-in-out infinite reverse;
}

.product-info {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

.rating {
  font-size: 0.9rem;
  color: var(--color-accent);
  display: flex;
  align-items: center;
  gap: var(--space-xs);
  font-weight: 600;
}

.rating-text {
  color: var(--text-muted);
  font-weight: 400;
}

.product-title {
  font-size: clamp(2rem, 5vw, 3.5rem);
  line-height: 1.1;
  font-weight: 800;
  letter-spacing: -1px;
  color: var(--text-main);
}

.product-desc {
  font-size: 1.1rem;
  color: var(--text-muted);
  line-height: 1.6;
  max-width: 90%;
}

.price-box {
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: var(--space-lg);
  box-shadow: var(--shadow-md);
  margin-top: var(--space-sm);
  position: relative;
  overflow: hidden;
}

.price-box::before {
  content: '';
  position: absolute;
  top: 0; left: 0; width: 4px; height: 100%;
  background: var(--color-primary);
}

.pack-size {
  display: block;
  font-weight: 600;
  font-size: 1.1rem;
  margin-bottom: var(--space-xs);
  color: var(--text-main);
}

.prices {
  display: flex;
  align-items: baseline;
  gap: var(--space-sm);
  margin-bottom: var(--space-xs);
}

.current-price {
  font-size: 2rem;
  font-weight: 800;
  color: var(--color-primary);
}

.regular-price {
  font-size: 1.2rem;
  color: var(--text-muted);
  text-decoration: line-through;
}

.save-badge {
  display: inline-block;
  background: var(--color-success);
  color: white;
  padding: 4px 12px;
  border-radius: var(--radius-pill);
  font-size: 0.85rem;
  font-weight: 700;
  margin-bottom: var(--space-sm);
}

.delivery-note {
  font-size: 0.85rem;
  color: var(--text-muted);
  font-style: italic;
}

.hero-cta-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-hover) 100%);
  color: #ffffff !important;
  padding: 16px 32px;
  border-radius: var(--radius-pill);
  font-size: 1.1rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  box-shadow: 0 8px 24px rgba(215, 15, 100, 0.4);
  transition: var(--transition-bounce);
  margin-top: var(--space-sm);
  width: 100%;
  max-width: 350px;
}

.hero-cta-btn:hover {
  transform: translateY(-4px) scale(1.02);
  box-shadow: 0 12px 32px rgba(215, 15, 100, 0.5);
}

/* Menu Section */
.menu-section {
  padding: var(--space-2xl) var(--space-md);
}

.section-header {
  text-align: center;
  margin-bottom: var(--space-xl);
}

.section-header h2 {
  font-size: clamp(2rem, 4vw, 2.5rem);
  font-weight: 800;
  letter-spacing: -0.5px;
  margin-bottom: var(--space-sm);
}

.section-header p {
  color: var(--text-muted);
  font-size: 1.1rem;
  margin-bottom: var(--space-md);
}

.restaurant-info {
  display: flex;
  justify-content: center;
  gap: var(--space-lg);
  flex-wrap: wrap;
  font-size: 0.9rem;
  background: var(--color-primary-light);
  padding: 12px 24px;
  border-radius: var(--radius-pill);
  display: inline-flex;
  color: var(--text-main);
  font-weight: 500;
}

/* App-like scrollable filters */
.menu-filters {
  display: flex;
  gap: var(--space-sm);
  overflow-x: auto;
  padding-bottom: var(--space-md);
  margin-bottom: var(--space-lg);
  scrollbar-width: none; /* Firefox */
  -ms-overflow-style: none;  /* IE and Edge */
}

.menu-filters::-webkit-scrollbar {
  display: none; /* Chrome, Safari and Opera */
}

.filter-btn {
  padding: 10px 24px;
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-pill);
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-muted);
  white-space: nowrap;
  transition: var(--transition-normal);
  box-shadow: var(--shadow-sm);
}

.filter-btn:hover {
  background: var(--bg-main);
  color: var(--text-main);
}

.filter-btn.active {
  background: var(--text-main);
  color: var(--bg-surface);
  border-color: var(--text-main);
}

/* Menu Grid */
.menu-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: var(--space-lg);
}

/* Premium Card Design */
.menu-item {
  background: var(--bg-surface);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
  border: 1px solid var(--border-color);
  box-shadow: var(--shadow-md);
  transition: var(--transition-normal);
  display: flex;
  flex-direction: column;
  height: 100%;
  position: relative;
  overflow: hidden;
}

.menu-item:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-hover);
  border-color: var(--color-primary-light);
}

.menu-item h3 {
  font-size: 1.2rem;
  font-weight: 700;
  margin-bottom: var(--space-xs);
  color: var(--text-main);
}

.menu-item p {
  font-size: 0.9rem;
  color: var(--text-muted);
  flex-grow: 1;
  margin-bottom: var(--space-md);
  line-height: 1.5;
}

.price-wrap {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  margin-bottom: var(--space-md);
}

.price-discount {
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--text-main);
}

.price-regular {
  font-size: 0.9rem;
  color: var(--text-muted);
  text-decoration: line-through;
}

.item-order-btn {
  display: block;
  width: 100%;
  text-align: center;
  background: var(--color-primary-light);
  color: var(--color-primary) !important;
  padding: 12px;
  border-radius: var(--radius-md);
  font-weight: 700;
  transition: var(--transition-fast);
}

.menu-item:hover .item-order-btn {
  background: var(--color-primary);
  color: #ffffff !important;
}

/* --- 6. Footer --- */
.main-footer {
  background: var(--bg-surface);
  border-top: 1px solid var(--border-color);
  padding: var(--space-2xl) 0 var(--space-md);
  margin-top: var(--space-2xl);
}

.footer-top {
  display: flex;
  flex-direction: column;
  gap: var(--space-lg);
  margin-bottom: var(--space-xl);
}

.brand-footer {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.footer-brand-img {
  height: 48px;
  width: 48px;
  object-fit: contain;
}

.brand-footer h3 {
  font-size: 1.5rem;
  font-weight: 800;
  letter-spacing: -0.5px;
}

.footer-links p {
  color: var(--text-muted);
  margin-bottom: var(--space-xs);
  font-size: 0.95rem;
}

.main-footer hr {
  border: none;
  border-top: 1px solid var(--border-color);
  margin-bottom: var(--space-lg);
}

.footer-bottom {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
  text-align: center;
  font-size: 0.85rem;
  color: var(--text-muted);
}

.footer-bottom .author {
  font-weight: 600;
  color: var(--text-main);
}

.powered-by {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-xs);
  margin-top: var(--space-sm);
  background: var(--bg-main);
  padding: 8px 16px;
  border-radius: var(--radius-pill);
  border: 1px solid var(--border-color);
}

.powered-by a {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-weight: 700;
  color: var(--text-main);
}

.footer-logo {
  height: 16px;
  width: auto;
}

/* --- 7. Responsive Media Queries --- */

/* Tablet Setup */
@media (min-width: 768px) {
  .hero-grid {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-2xl);
  }

  .product-image-container {
    order: 2; /* Image on right for desktop */
  }

  .product-info {
    order: 1;
    align-items: flex-start;
  }

  .product-desc {
    max-width: 100%;
  }

  .hero-cta-btn {
    width: auto;
  }
  
  .footer-top {
    flex-direction: row;
    justify-content: space-between;
    align-items: center;
  }
  
  .footer-bottom {
    flex-direction: row;
    justify-content: space-between;
    text-align: left;
  }
  
  .powered-by {
    margin-top: 0;
  }
}

/* Desktop & App-like Navigation Setup */
@media (min-width: 1024px) {
  .mobile-menu-btn {
    display: none;
  }

  .nav-links {
    display: flex;
  }

  .nav-cta-btn {
    display: inline-block;
  }
  
  .menu-grid {
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  }
}