/* ==========================================================================
   LIEN DONG COFFEE - Design System & Master Stylesheet
   Tagline: "TỪ NÔNG TRẠI ĐẾN LY CÀ PHÊ"
   Aesthetics: Premium, Authentic, Organic/Natural, Farm-to-Cup
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Be+Vietnam+Pro:ital,wght@0,300;0,400;0,500;0,600;0,700;1,400&family=Lora:ital,wght@0,500;0,600;0,700;1,400&display=swap');

:root {
  /* Color Palette */
  --clr-farm-green: #1b3b2b;
  --clr-farm-green-dark: #11261b;
  --clr-farm-green-light: #2c5943;
  --clr-coffee-dark: #2c1d11;
  --clr-coffee-medium: #4a3424;
  --clr-cream-bg: #f9f6f0;
  --clr-cream-card: #f3ece1;
  --clr-cream-light: #fcfbfa;
  --clr-accent-bronze: #c07736;
  --clr-accent-hover: #a56126;
  --clr-text-main: #2b2623;
  --clr-text-muted: #665d56;
  --clr-border: #e3d9cc;
  --clr-white: #ffffff;
  
  /* Fonts - Premium Vietnamese Typography System */
  --font-heading: 'Lora', 'Georgia', serif;
  --font-body: 'Be Vietnam Pro', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;

  
  /* Shadows & Radius */
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --shadow-sm: 0 4px 12px rgba(44, 29, 17, 0.04);
  --shadow-md: 0 8px 24px rgba(44, 29, 17, 0.08);
  --shadow-lg: 0 16px 40px rgba(27, 59, 43, 0.12);
  --transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
}

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

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

body {
  font-family: var(--font-body);
  background-color: var(--clr-cream-bg);
  color: var(--clr-text-main);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

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

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

ul {
  list-style: none;
}

/* Typography Utilities */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  color: var(--clr-coffee-dark);
  font-weight: 700;
  line-height: 1.25;
  margin-bottom: 0.75rem;
}

.text-green { color: var(--clr-farm-green); }
.text-bronze { color: var(--clr-accent-bronze); }
.text-muted { color: var(--clr-text-muted); }
.text-center { text-align: center; }

.section-tag {
  display: inline-block;
  font-size: 0.825rem;
  font-weight: 700;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--clr-accent-bronze);
  margin-bottom: 0.75rem;
}

.section-title {
  font-size: 2.25rem;
  margin-bottom: 1rem;
}

@media (min-width: 768px) {
  .section-title { font-size: 2.75rem; }
}

.section-desc {
  font-size: 1.1rem;
  color: var(--clr-text-muted);
  max-width: 720px;
  margin: 0 auto 2.5rem auto;
}

/* Container */
.container {
  width: 100%;
  max-width: 1240px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* Header & Navigation */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background-color: rgba(249, 246, 240, 0.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--clr-border);
  transition: var(--transition);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 80px;
}

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

.brand-name {
  font-family: var(--font-heading);
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: 1px;
  color: var(--clr-farm-green);
}

.brand-tagline {
  font-size: 0.65rem;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--clr-accent-bronze);
  font-weight: 600;
  margin-top: -3px;
}

.nav-menu {
  display: none;
  align-items: center;
  gap: 1.75rem;
}

@media (min-width: 992px) {
  .nav-menu { display: flex; }
}

.nav-link {
  font-size: 0.925rem;
  font-weight: 600;
  color: var(--clr-text-main);
  position: relative;
}

.nav-link:hover, .nav-link.active {
  color: var(--clr-farm-green);
}

.nav-link.active::after {
  content: '';
  position: absolute;
  bottom: -6px;
  left: 0;
  width: 100%;
  height: 2px;
  background-color: var(--clr-accent-bronze);
}

.header-cta {
  display: none;
  align-items: center;
  gap: 1rem;
}

@media (min-width: 768px) {
  .header-cta { display: flex; }
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.75rem 1.6rem;
  font-size: 0.9rem;
  font-weight: 700;
  letter-spacing: 0.5px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  border: 2px solid transparent;
  transition: var(--transition);
}

.btn-primary {
  background-color: var(--clr-farm-green);
  color: var(--clr-white);
}

.btn-primary:hover {
  background-color: var(--clr-farm-green-dark);
}

.btn-accent {
  background-color: var(--clr-accent-bronze);
  color: var(--clr-white);
}

.btn-accent:hover {
  background-color: var(--clr-accent-hover);
}

.btn-outline {
  border-color: var(--clr-farm-green);
  color: var(--clr-farm-green);
  background-color: transparent;
}

.btn-outline:hover {
  background-color: var(--clr-farm-green);
  color: var(--clr-white);
}

.btn-outline-white {
  border-color: var(--clr-white);
  color: var(--clr-white);
  background-color: transparent;
}

.btn-outline-white:hover {
  background-color: var(--clr-white);
  color: var(--clr-coffee-dark);
}

.btn-sm {
  padding: 0.5rem 1.1rem;
  font-size: 0.825rem;
}

/* Hamburger Menu Toggle */
.mobile-toggle {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  width: 28px;
  height: 20px;
  background: none;
  border: none;
  cursor: pointer;
}

@media (min-width: 992px) {
  .mobile-toggle { display: none; }
}

.mobile-toggle span {
  width: 100%;
  height: 2.5px;
  background-color: var(--clr-farm-green);
  border-radius: 2px;
  transition: var(--transition);
}

/* Mobile Drawer */
.mobile-drawer {
  position: fixed;
  top: 0;
  right: -100%;
  width: 85%;
  max-width: 380px;
  height: 100vh;
  background-color: var(--clr-cream-bg);
  box-shadow: -5px 0 25px rgba(0,0,0,0.15);
  z-index: 1100;
  padding: 2.5rem 2rem;
  display: flex;
  flex-direction: column;
  transition: right 0.35s ease-in-out;
}

.mobile-drawer.open {
  right: 0;
}

.mobile-drawer-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 2rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--clr-border);
}

.close-drawer {
  background: none;
  border: none;
  font-size: 1.75rem;
  color: var(--clr-coffee-dark);
  cursor: pointer;
}

.mobile-nav-links {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
  margin-bottom: 2rem;
}

.mobile-nav-link {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--clr-coffee-dark);
}

.drawer-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.5);
  z-index: 1050;
  opacity: 0;
  visibility: hidden;
  transition: var(--transition);
}

.drawer-backdrop.show {
  opacity: 1;
  visibility: visible;
}

/* Hero Section */
.hero-section {
  position: relative;
  min-height: 85vh;
  display: flex;
  align-items: center;
  background-size: cover;
  background-position: center;
  color: var(--clr-white);
  padding: 5rem 0;
}

.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(27, 59, 43, 0.82) 0%, rgba(44, 29, 17, 0.88) 100%);
}

.hero-content {
  position: relative;
  z-index: 2;
  max-width: 800px;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.4rem 1rem;
  background: rgba(255, 255, 255, 0.15);
  backdrop-filter: blur(8px);
  border: 1px solid rgba(255, 255, 255, 0.3);
  border-radius: 50px;
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: 1.5rem;
}

.hero-title {
  color: var(--clr-white);
  font-size: 2.5rem;
  line-height: 1.2;
  margin-bottom: 1.5rem;
}

@media (min-width: 768px) {
  .hero-title { font-size: 3.75rem; }
}

.hero-subtitle {
  font-size: 1.15rem;
  line-height: 1.7;
  color: rgba(255, 255, 255, 0.9);
  margin-bottom: 2.25rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
}

/* Statistics Grid Section */
.stats-section {
  margin-top: -4rem;
  position: relative;
  z-index: 10;
  margin-bottom: 4rem;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1rem;
  background: var(--clr-white);
  padding: 2rem;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--clr-border);
}

@media (min-width: 768px) {
  .stats-grid {
    grid-template-columns: repeat(4, 1fr);
    padding: 2.5rem 2rem;
  }
}

.stat-item {
  text-align: center;
  padding: 1rem;
  border-right: 1px dashed var(--clr-border);
}

.stat-item:last-child {
  border-right: none;
}

.stat-number {
  font-family: var(--font-heading);
  font-size: 2.25rem;
  font-weight: 700;
  color: var(--clr-farm-green);
  line-height: 1.1;
  margin-bottom: 0.35rem;
}

.stat-label {
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  color: var(--clr-accent-bronze);
}

.stat-sub {
  font-size: 0.8rem;
  color: var(--clr-text-muted);
  margin-top: 0.25rem;
}

/* Sections Global Layout */
.py-section {
  padding: 5rem 0;
}

.bg-cream-card {
  background-color: var(--clr-cream-card);
}

.bg-farm-green {
  background-color: var(--clr-farm-green);
  color: var(--clr-white);
}

.bg-farm-green h2, .bg-farm-green h3 {
  color: var(--clr-white);
}

/* Timeline Components (01 - 05) */
.timeline-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
}

@media (min-width: 768px) {
  .timeline-grid {
    grid-template-columns: repeat(5, 1fr);
    gap: 1rem;
  }
}

.timeline-card {
  background: var(--clr-white);
  padding: 1.75rem 1.25rem;
  border-radius: var(--radius-md);
  border: 1px solid var(--clr-border);
  box-shadow: var(--shadow-sm);
  position: relative;
  transition: var(--transition);
}

.timeline-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-md);
  border-color: var(--clr-accent-bronze);
}

.timeline-number {
  font-family: var(--font-heading);
  font-size: 2rem;
  font-weight: 700;
  color: var(--clr-accent-bronze);
  line-height: 1;
  margin-bottom: 0.75rem;
}

.timeline-title {
  font-size: 1.1rem;
  color: var(--clr-farm-green);
  margin-bottom: 0.5rem;
}

.timeline-desc {
  font-size: 0.875rem;
  color: var(--clr-text-muted);
  line-height: 1.5;
}

/* USP Cards */
.usp-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
}

@media (min-width: 768px) {
  .usp-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 992px) {
  .usp-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}

.usp-card {
  background: var(--clr-white);
  padding: 2rem 1.5rem;
  border-radius: var(--radius-md);
  border: 1px solid var(--clr-border);
  box-shadow: var(--shadow-sm);
  text-align: center;
  transition: var(--transition);
}

.usp-card:hover {
  transform: translateY(-5px);
  border-color: var(--clr-farm-green);
  box-shadow: var(--shadow-md);
}

.usp-icon {
  width: 60px;
  height: 60px;
  background: var(--clr-cream-card);
  color: var(--clr-farm-green);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 1.25rem auto;
  font-size: 1.5rem;
}

.usp-title {
  font-size: 1.15rem;
  margin-bottom: 0.75rem;
}

/* Story Section */
.story-wrapper {
  display: grid;
  grid-template-columns: 1fr;
  gap: 3rem;
  align-items: center;
}

@media (min-width: 992px) {
  .story-wrapper {
    grid-template-columns: 1fr 1fr;
  }
}

.story-image-box {
  position: relative;
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
}

.story-image-box img {
  width: 100%;
  height: 480px;
  object-fit: cover;
  transition: transform 0.6s ease;
}

.story-image-box:hover img {
  transform: scale(1.03);
}

.story-pillar-badge {
  display: flex;
  gap: 1rem;
  margin: 1.5rem 0;
}

.pillar-item {
  padding: 0.5rem 1rem;
  background: var(--clr-cream-card);
  border-radius: var(--radius-sm);
  font-weight: 700;
  font-size: 0.9rem;
  color: var(--clr-farm-green);
  border: 1px solid var(--clr-border);
}

/* Product Cards Grid */
.products-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
}

@media (min-width: 768px) {
  .products-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 992px) {
  .products-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}

.product-card {
  background: var(--clr-white);
  border-radius: var(--radius-md);
  border: 1px solid var(--clr-border);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  transition: var(--transition);
}

.product-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-md);
  border-color: var(--clr-accent-bronze);
}

.product-img-box {
  position: relative;
  height: 260px;
  background: var(--clr-cream-bg);
  overflow: hidden;
}

.product-img-box img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
}

.product-card:hover .product-img-box img {
  transform: scale(1.06);
}

.product-tag {
  position: absolute;
  top: 12px;
  left: 12px;
  background: var(--clr-farm-green);
  color: var(--clr-white);
  font-size: 0.75rem;
  font-weight: 700;
  padding: 0.3rem 0.75rem;
  border-radius: 30px;
}

.product-body {
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  flex-grow: 1;
}

.product-title {
  font-size: 1.35rem;
  margin-bottom: 0.5rem;
}

.product-desc {
  font-size: 0.875rem;
  color: var(--clr-text-muted);
  margin-bottom: 1rem;
  flex-grow: 1;
}

.taste-meters {
  margin: 1rem 0;
  padding: 0.75rem 0;
  border-top: 1px dashed var(--clr-border);
  border-bottom: 1px dashed var(--clr-border);
}

.meter-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.775rem;
  margin-bottom: 0.35rem;
}

.meter-bar {
  width: 60%;
  height: 6px;
  background: var(--clr-cream-card);
  border-radius: 3px;
  overflow: hidden;
}

.meter-fill {
  height: 100%;
  background: var(--clr-accent-bronze);
  border-radius: 3px;
}

/* B2B Banner */
.b2b-banner {
  background: linear-gradient(135deg, var(--clr-farm-green-dark) 0%, var(--clr-farm-green) 100%);
  color: var(--clr-white);
  border-radius: var(--radius-lg);
  padding: 3.5rem 2rem;
  text-align: center;
  box-shadow: var(--shadow-lg);
}

.b2b-banner h2 {
  color: var(--clr-white);
  margin-bottom: 1rem;
}

.b2b-banner p {
  color: rgba(255, 255, 255, 0.9);
  max-width: 700px;
  margin: 0 auto 2rem auto;
  font-size: 1.1rem;
}

.b2b-actions {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 1rem;
}

/* Forms & Inputs */
.form-group {
  margin-bottom: 1.25rem;
  text-align: left;
}

.form-label {
  display: block;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--clr-coffee-dark);
  margin-bottom: 0.4rem;
}

.form-control {
  width: 100%;
  padding: 0.8rem 1rem;
  font-size: 0.95rem;
  font-family: var(--font-body);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-sm);
  background-color: var(--clr-white);
  color: var(--clr-text-main);
  transition: var(--transition);
}

.form-control:focus {
  outline: none;
  border-color: var(--clr-farm-green);
  box-shadow: 0 0 0 3px rgba(27, 59, 43, 0.12);
}

textarea.form-control {
  resize: vertical;
  min-height: 110px;
}

/* Modal Dialog */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.65);
  backdrop-filter: blur(4px);
  z-index: 2000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1.5rem;
  opacity: 0;
  visibility: hidden;
  transition: var(--transition);
}

.modal-overlay.active {
  opacity: 1;
  visibility: visible;
}

.modal-card {
  background: var(--clr-white);
  border-radius: var(--radius-md);
  width: 100%;
  max-width: 750px;
  max-height: 90vh;
  overflow-y: auto;
  padding: 2.5rem 2rem;
  position: relative;
  box-shadow: var(--shadow-lg);
}

.modal-close {
  position: absolute;
  top: 1.25rem;
  right: 1.25rem;
  background: var(--clr-cream-card);
  border: none;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  font-size: 1.25rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition);
}

.modal-close:hover {
  background: var(--clr-farm-green);
  color: var(--clr-white);
}

/* Tree Hotspot Interactive Nodes */
.tree-hotspot-node {
  background: rgba(27, 59, 43, 0.9);
  color: #fff;
  border: 2px solid var(--clr-accent-gold);
  border-radius: 20px;
  padding: 0.35rem 0.85rem;
  font-size: 0.8rem;
  font-weight: 700;
  cursor: pointer;
  transition: var(--transition-base);
  box-shadow: 0 4px 12px rgba(0,0,0,0.3);
  z-index: 10;
}

.tree-hotspot-node:hover,
.tree-hotspot-node.active {
  background: var(--clr-accent-bronze);
  transform: scale(1.1);
  box-shadow: 0 6px 16px rgba(0,0,0,0.4);
}


.sticky-bottom-bar {
  display: none;
}

@media (max-width: 768px) {
  .mobile-floating-bar {
    bottom: 4.5rem;
  }

  .sticky-bottom-bar {
    display: flex;
    position: fixed;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 54px;
    background: var(--clr-farm-green);
    z-index: 999;
    box-shadow: 0 -2px 10px rgba(0,0,0,0.15);
    border-top: 1px solid rgba(255,255,255,0.1);
  }

  .sticky-bottom-btn {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.4rem;
    color: var(--clr-white);
    font-weight: 700;
    font-size: 0.85rem;
    text-decoration: none;
    border: none;
    background: transparent;
    cursor: pointer;
  }

  .sticky-bottom-btn:first-child {
    border-right: 1px solid rgba(255,255,255,0.15);
    background: var(--clr-accent-bronze);
  }
}

.float-btn {
  width: 52px;
  height: 52px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--clr-white);
  box-shadow: 0 6px 18px rgba(0,0,0,0.25);
  font-size: 1.4rem;
  transition: var(--transition);
}

.float-btn-zalo {
  background-color: #0068ff;
}

.float-btn-phone {
  background-color: var(--clr-farm-green);
}

.float-btn:hover {
  transform: scale(1.1);
}

/* Back to Top Button */
.back-to-top {
  position: fixed;
  bottom: 20px;
  left: 20px;
  width: 44px;
  height: 44px;
  background: var(--clr-coffee-dark);
  color: var(--clr-white);
  border-radius: 50%;
  border: none;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transition: var(--transition);
  z-index: 980;
}

.back-to-top.show {
  opacity: 1;
  visibility: visible;
}

/* Breadcrumb */
.breadcrumb-nav {
  padding: 1.25rem 0;
  font-size: 0.875rem;
  color: var(--clr-text-muted);
}

.breadcrumb-list {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.breadcrumb-item a:hover {
  color: var(--clr-farm-green);
}

/* Footer */
.site-footer {
  background-color: var(--clr-coffee-dark);
  color: var(--clr-cream-bg);
  padding: 4rem 0 2rem 0;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2.5rem;
  margin-bottom: 3rem;
}

@media (min-width: 768px) {
  .footer-grid {
    grid-template-columns: 2fr 1fr 1.5fr;
  }
}

.footer-brand h3 {
  color: var(--clr-white);
  font-size: 1.5rem;
  margin-bottom: 0.5rem;
}

.footer-brand p {
  color: rgba(249, 246, 240, 0.75);
  font-size: 0.95rem;
}

.footer-links h4, .footer-contact h4 {
  color: var(--clr-white);
  font-size: 1.1rem;
  margin-bottom: 1.25rem;
}

.footer-menu {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.footer-menu a {
  color: rgba(249, 246, 240, 0.75);
  font-size: 0.9rem;
}

.footer-menu a:hover {
  color: var(--clr-accent-bronze);
}

.footer-bottom {
  padding-top: 2rem;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  text-align: center;
  font-size: 0.85rem;
  color: rgba(249, 246, 240, 0.5);
}

/* Toast Notification */
.toast-msg {
  position: fixed;
  bottom: 30px;
  right: 30px;
  background: var(--clr-farm-green);
  color: var(--clr-white);
  padding: 1rem 1.5rem;
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-lg);
  z-index: 3000;
  transform: translateY(100px);
  opacity: 0;
  transition: var(--transition);
}

.toast-msg.show {
  transform: translateY(0);
  opacity: 1;
}

/* Animation helpers */
.fade-up {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-up.visible {
  opacity: 1;
  transform: translateY(0);
}