/* ==========================================================================
   DESIGN SYSTEM & MODERN CORE STYLESHEET — CÀ PHÊ MUỐI ANH BẾU
   Style: Luxury Dark-Mode Glassmorphism & High Contrast Coffee Aesthetic
   ========================================================================== */

/* --------------------------------------------------------------------------
   1. MODERN THEME TOKENS
   -------------------------------------------------------------------------- */
:root {
  /* Dynamic Color Palette - Ultra Modern Dark Coffee & Cream Gold */
  --primary-coffee: #1a0f0a;       /* Nâu hạt Espresso cực tối cao cấp */
  --primary-coffee-light: #2c1a12;
  --accent-gold: #e59866;          /* Vàng hổ phách ánh kim */
  --accent-gold-gradient: linear-gradient(135deg, #e59866 0%, #d35400 100%);
  --accent-cream: #f9f3ea;         /* Kem béo mịn màng */
  --accent-cream-glow: rgba(249, 243, 234, 0.08);
  
  --text-main: #2b1810;            
  --text-muted: #7a685d;           
  --text-light: #ffffff;           
  
  --bg-main: #f5efe6;              /* Nền màu giấy Kraft sang trọng */
  --bg-card: #ffffff;              
  --bg-glass: rgba(255, 255, 255, 0.75);
  
  --border-color: rgba(61, 35, 20, 0.1);
  --border-glow: rgba(229, 152, 102, 0.3);
  
  --shadow-sm: 0 4px 10px rgba(26, 15, 10, 0.04);
  --shadow-md: 0 10px 30px rgba(26, 15, 10, 0.08);
  --shadow-hover: 0 20px 40px rgba(26, 15, 10, 0.15);
  
  --radius-sm: 12px;
  --radius-md: 20px;
  --radius-lg: 32px;
  
  --font-family: 'Outfit', 'Inter', system-ui, -apple-system, sans-serif;
  --transition-normal: all 0.35s cubic-bezier(0.16, 1, 0.3, 1);
}

/* --------------------------------------------------------------------------
   2. RESET & BASE STYLES
   -------------------------------------------------------------------------- */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: var(--font-family);
  background-color: var(--bg-main);
  color: var(--text-main);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

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

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

button, input, textarea, select {
  font-family: inherit;
  font-size: inherit;
}

.container {
  width: 100%;
  max-width: 1240px;
  margin: 0 auto;
  padding: 0 24px;
}

/* --------------------------------------------------------------------------
   3. MODERN FLOATING HEADER & NAVIGATION
   -------------------------------------------------------------------------- */
.site-header {
  position: fixed;
  top: 20px;
  left: 50%;
  transform: translateX(-50%);
  width: calc(100% - 48px);
  max-width: 1240px;
  z-index: 1000;
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(16px) saturate(180%);
  -webkit-backdrop-filter: blur(16px) saturate(180%);
  border: 1px solid rgba(255, 255, 255, 0.6);
  border-radius: 40px;
  box-shadow: 0 8px 32px rgba(31, 38, 135, 0.07);
  transition: var(--transition-normal);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
  padding: 0 24px;
}

/* Logo thương hiệu hiện đại */
.brand-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 1.35rem;
  font-weight: 800;
  color: var(--primary-coffee);
  letter-spacing: -0.5px;
}

.brand-logo .logo-img {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  object-fit: cover;
  box-shadow: 0 4px 12px rgba(0,0,0,0.15);
  border: 2px solid var(--accent-gold);
  transition: transform 0.3s ease;
}

.brand-logo:hover .logo-img {
  transform: rotate(10deg) scale(1.05);
}

/* Nav links pill style */
.main-nav {
  display: flex;
  align-items: center;
  gap: 8px;
  background: rgba(61, 35, 20, 0.04);
  padding: 6px;
  border-radius: 30px;
}

.nav-link {
  font-weight: 600;
  font-size: 0.95rem;
  color: var(--text-muted);
  padding: 8px 18px;
  border-radius: 20px;
  transition: var(--transition-normal);
}

.nav-link:hover {
  color: var(--primary-coffee);
}

.nav-link.active {
  background-color: var(--primary-coffee);
  color: #ffffff !important;
  box-shadow: 0 4px 12px rgba(26, 15, 10, 0.2);
}

.mobile-toggle {
  display: none;
  background: none;
  border: none;
  font-size: 1.6rem;
  color: var(--primary-coffee);
  cursor: pointer;
}

/* --------------------------------------------------------------------------
   4. MODERN BUTTONS & BADGES
   -------------------------------------------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 14px 32px;
  font-weight: 700;
  font-size: 0.95rem;
  border-radius: 40px;
  cursor: pointer;
  border: none;
  transition: var(--transition-normal);
  letter-spacing: 0.2px;
}

.btn-primary {
  background: var(--primary-coffee);
  color: var(--accent-cream);
  box-shadow: 0 8px 20px rgba(26, 15, 10, 0.2);
}

.btn-primary:hover {
  background: #2d180f;
  transform: translateY(-3px) scale(1.02);
  box-shadow: 0 14px 28px rgba(26, 15, 10, 0.3);
}

.btn-accent {
  background: var(--accent-gold-gradient);
  color: #ffffff;
  box-shadow: 0 8px 20px rgba(211, 84, 0, 0.25);
}

.btn-accent:hover {
  transform: translateY(-3px) scale(1.02);
  box-shadow: 0 14px 28px rgba(211, 84, 0, 0.35);
}

.btn-outline {
  background: transparent;
  color: var(--primary-coffee);
  border: 2px solid var(--primary-coffee);
}

.btn-outline:hover {
  background: var(--primary-coffee);
  color: #ffffff;
  transform: translateY(-3px);
}

.badge {
  display: inline-block;
  padding: 6px 14px;
  font-size: 0.75rem;
  font-weight: 800;
  text-transform: uppercase;
  border-radius: 30px;
  letter-spacing: 0.8px;
}

.badge-best-seller {
  background: linear-gradient(135deg, #fff3e0, #ffe0b2);
  color: #e65100;
  border: 1px solid rgba(230, 81, 0, 0.2);
}

.badge-new {
  background: linear-gradient(135deg, #e3f2fd, #bbdefb);
  color: #1565c0;
}

/* --------------------------------------------------------------------------
   5. MODERN CARD GRID & GLASSMORPHISM
   -------------------------------------------------------------------------- */
.section-header {
  text-align: center;
  max-width: 650px;
  margin: 0 auto 60px auto;
}

.section-subtitle {
  color: var(--accent-gold);
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 2px;
  font-size: 0.85rem;
  margin-bottom: 12px;
  display: block;
}

.section-title {
  font-size: 2.6rem;
  font-weight: 800;
  color: var(--primary-coffee);
  line-height: 1.25;
  letter-spacing: -0.8px;
}

.section-description {
  color: var(--text-muted);
  margin-top: 14px;
  font-size: 1.1rem;
}

.menu-item-card {
  background: var(--bg-card);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border-color);
  transition: var(--transition-normal);
  display: flex;
  flex-direction: column;
}

.menu-item-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-hover);
  border-color: var(--border-glow);
}

.card-img-wrapper {
  position: relative;
  height: 220px;
  overflow: hidden;
}

.card-img-wrapper img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

.menu-item-card:hover .card-img-wrapper img {
  transform: scale(1.08);
}

.card-badge {
  position: absolute;
  top: 16px;
  right: 16px;
  z-index: 2;
}

.card-content {
  padding: 24px;
  display: flex;
  flex-direction: column;
  flex-grow: 1;
}

.item-title {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--primary-coffee);
  line-height: 1.3;
}

.item-price {
  font-size: 1.3rem;
  font-weight: 800;
  color: #d35400;
}

.item-desc {
  color: var(--text-muted);
  font-size: 0.92rem;
  margin: 12px 0 20px 0;
  line-height: 1.6;
  flex-grow: 1;
}

/* --------------------------------------------------------------------------
   6. SKELETON & FALLBACK
   -------------------------------------------------------------------------- */
.skeleton-card {
  background: #ffffff;
  border-radius: var(--radius-md);
  padding: 24px;
  border: 1px solid var(--border-color);
}

.skeleton-box {
  background: linear-gradient(90deg, #efe6db 25%, #f7f1e9 50%, #efe6db 75%);
  background-size: 200% 100%;
  animation: skeleton-loading 1.5s infinite;
  border-radius: 8px;
}

@keyframes skeleton-loading {
  0% { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}

/* --------------------------------------------------------------------------
   7. FOOTER STYLES
   -------------------------------------------------------------------------- */
.site-footer {
  background-color: var(--primary-coffee);
  color: var(--accent-cream);
  padding: 80px 0 40px 0;
  margin-top: 100px;
  border-top-left-radius: 40px;
  border-top-right-radius: 40px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.5fr;
  gap: 50px;
  margin-bottom: 60px;
}

.footer-brand p {
  color: rgba(249, 243, 234, 0.7);
  margin-top: 18px;
  font-size: 0.95rem;
  line-height: 1.7;
}

.footer-col h4 {
  color: #ffffff;
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 24px;
  letter-spacing: 0.5px;
}

.footer-links {
  list-style: none;
}

.footer-links li {
  margin-bottom: 14px;
}

.footer-links a {
  color: rgba(249, 243, 234, 0.7);
}

.footer-links a:hover {
  color: var(--accent-gold);
  padding-left: 6px;
}

.footer-bottom {
  border-top: 1px solid rgba(249, 243, 234, 0.12);
  padding-top: 30px;
  text-align: center;
  color: rgba(249, 243, 234, 0.5);
  font-size: 0.9rem;
}

/* --------------------------------------------------------------------------
   8. RESPONSIVE BREAKPOINTS
   -------------------------------------------------------------------------- */
@media (max-width: 992px) {
  .site-header {
    top: 12px;
    width: calc(100% - 24px);
  }
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 768px) {
  .mobile-toggle {
    display: block;
  }

  .main-nav {
    position: absolute;
    top: 80px;
    left: 0;
    width: 100%;
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(20px);
    flex-direction: column;
    padding: 24px;
    gap: 12px;
    border-radius: var(--radius-md);
    box-shadow: 0 20px 40px rgba(0,0,0,0.15);
    display: none;
  }

  .main-nav.active {
    display: flex;
  }

  .footer-grid {
    grid-template-columns: 1fr;
  }

  .section-title {
    font-size: 2rem;
  }
}

/* --------------------------------------------------------------------------
   9. MODERN ANIMATIONS & MICRO-INTERACTIONS (FEAT: ANIMATION SYSTEM)
   -------------------------------------------------------------------------- */

/* Trạng thái Header thu gọn khi cuộn trang */
.site-header.scrolled {
  top: 10px;
  background: rgba(255, 255, 255, 0.95);
  box-shadow: 0 12px 40px rgba(26, 15, 10, 0.12);
  border-color: rgba(229, 152, 102, 0.4);
}

.site-header.scrolled .header-inner {
  height: 58px;
}

/* Keyframes Chuyển Động */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes zoomIn {
  from {
    opacity: 0;
    transform: scale(0.92);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}

@keyframes floatSmooth {
  0%, 100% {
    transform: translateY(0) rotate(0deg);
  }
  50% {
    transform: translateY(-8px) rotate(1deg);
  }
}

@keyframes amberPulse {
  0%, 100% {
    box-shadow: 0 8px 20px rgba(211, 84, 0, 0.25);
  }
  50% {
    box-shadow: 0 14px 30px rgba(211, 84, 0, 0.45);
  }
}

@keyframes shimmerSweep {
  0% {
    background-position: -200% 0;
  }
  100% {
    background-position: 200% 0;
  }
}

/* Scroll Reveal Classes (Sử dụng với IntersectionObserver) */
.reveal-on-scroll {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.7s cubic-bezier(0.16, 1, 0.3, 1), transform 0.7s cubic-bezier(0.16, 1, 0.3, 1);
  will-change: opacity, transform;
}

.reveal-on-scroll.zoom-in {
  transform: scale(0.93);
}

.reveal-on-scroll.revealed {
  opacity: 1;
  transform: translateY(0) scale(1);
}

/* Stagger Delays cho danh sách thẻ */
.stagger-1 { transition-delay: 0.1s; }
.stagger-2 { transition-delay: 0.2s; }
.stagger-3 { transition-delay: 0.3s; }
.stagger-4 { transition-delay: 0.4s; }

/* Hiệu ứng Nâng Thẻ & Viền Hổ Phách Phát Sáng */
.amber-glow-card {
  transition: transform 0.4s cubic-bezier(0.16, 1, 0.3, 1), box-shadow 0.4s ease, border-color 0.4s ease;
}

.amber-glow-card:hover {
  transform: translateY(-8px) scale(1.01);
  border-color: rgba(211, 84, 0, 0.5) !important;
  box-shadow: 0 20px 45px rgba(211, 84, 0, 0.18) !important;
}

/* Floating Animation cho Hero Badge */
.floating-badge {
  animation: floatSmooth 4s ease-in-out infinite;
}

/* Button Micro-Interactions */
.btn-accent {
  animation: amberPulse 3s infinite;
}

.btn-accent:hover {
  animation: none;
}

/* Subtle Link Underline Animated Effect */
.nav-link {
  position: relative;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 4px;
  left: 50%;
  width: 0;
  height: 2px;
  background: var(--accent-gold);
  transition: width 0.3s ease, left 0.3s ease;
  border-radius: 2px;
}

.nav-link:hover::after {
  width: 60%;
  left: 20%;
}

.nav-link.active::after {
  display: none;
}