/* ==========================================================================
   VnBusiness Interactive Longform Stylesheet
   Theme: #E31B21 (Accent Red) & #F5EBE1 (Gentle Warm Cream)
   Font: 'Encode Sans', sans-serif
   ========================================================================== */

/* --- Design Tokens --- */
:root {
  --color-red: #E31B21;
  --color-red-hover: #b81217;
  --color-red-light: rgba(227, 27, 33, 0.08);
  --color-red-border: rgba(227, 27, 33, 0.22);
  --color-red-glow: rgba(227, 27, 33, 0.25);

  --color-bg-cream: #F5EBE1;
  --color-bg-cream-tint: #FAF5F0;
  --color-bg-cream-dark: #E6D8CA;
  --color-card-white: #FFFFFF;

  --color-text-main: #201C19;
  --color-text-prose: #2C2622;
  --color-text-secondary: #5A5047;
  --color-text-muted: #8C8075;

  --font-family: 'Encode Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-size-prose: 19px;
  --line-height-prose: 1.88;

  --prose-width: 760px;
  --breakout-width: 1160px;

  --radius-xs: 4px;
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 22px;

  --shadow-subtle: 0 4px 20px rgba(45, 33, 24, 0.05);
  --shadow-elevated: 0 12px 36px rgba(45, 33, 24, 0.08);
  --shadow-red: 0 8px 24px rgba(227, 27, 33, 0.16);
}

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

html {
  font-family: var(--font-family);
  font-size: var(--font-size-prose);
  color: var(--color-text-main);
  background-color: var(--color-bg-cream);
  scroll-behavior: smooth;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

body {
  background-color: var(--color-bg-cream);
  color: var(--color-text-main);
  line-height: var(--line-height-prose);
  overflow-x: hidden;
  position: relative;
  min-height: 100vh;
}

::selection {
  background-color: var(--color-red);
  color: #fff;
}

.container {
  width: 100%;
  max-width: var(--breakout-width);
  margin-left: auto;
  margin-right: auto;
  padding-left: 24px;
  padding-right: 24px;
}

/* --- Reading Progress Bar --- */
.reading-progress-bar-container {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background-color: rgba(227, 27, 33, 0.15);
  z-index: 1000;
}

.reading-progress-bar {
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, #E31B21, #FF565C);
  box-shadow: 0 0 10px rgba(227, 27, 33, 0.6);
  transition: width 0.1s linear;
}

/* --- VnBusiness Header --- */
.vnb-header {
  position: sticky;
  top: 0;
  background-color: rgba(245, 235, 225, 0.96);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(227, 27, 33, 0.16);
  z-index: 900;
  box-shadow: 0 2px 14px rgba(45, 33, 24, 0.04);
}

.header-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 12px;
  padding-bottom: 12px;
}

.header-left {
  display: flex;
  align-items: center;
  gap: 12px;
}

.vnb-logo {
  text-decoration: none;
  display: flex;
  align-items: baseline;
  gap: 3px;
}

.logo-vn {
  color: var(--color-red);
  font-size: 27px;
  font-weight: 900;
  letter-spacing: -0.04em;
}

.logo-biz {
  color: var(--color-text-main);
  font-size: 25px;
  font-weight: 800;
  letter-spacing: -0.02em;
}

.logo-badge {
  font-size: 9px;
  font-weight: 800;
  letter-spacing: 0.14em;
  color: var(--color-red);
  margin-left: 8px;
  padding: 2px 6px;
  border: 1px solid var(--color-red);
  border-radius: var(--radius-xs);
  align-self: center;
}

/* Header Tools */
.header-tools {
  display: flex;
  align-items: center;
  gap: 12px;
}

.reading-time-tag {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 14px;
  font-weight: 700;
  color: var(--color-text-secondary);
  background: rgba(255, 255, 255, 0.7);
  padding: 5px 12px;
  border-radius: var(--radius-md);
  border: 1px solid rgba(0, 0, 0, 0.06);
}

.reading-time-tag svg {
  color: var(--color-red);
}

.font-size-adjuster {
  display: flex;
  align-items: center;
  background: rgba(255, 255, 255, 0.7);
  border-radius: var(--radius-md);
  padding: 3px;
  border: 1px solid rgba(0, 0, 0, 0.06);
}

.font-btn {
  background: transparent;
  border: none;
  font-family: var(--font-family);
  font-size: 13px;
  font-weight: 700;
  color: var(--color-text-secondary);
  padding: 4px 10px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all 0.2s ease;
}

.font-btn:hover {
  color: var(--color-red);
}

.font-btn.active {
  background-color: var(--color-red);
  color: #fff;
}

.btn-share {
  display: flex;
  align-items: center;
  gap: 6px;
  background: rgba(255, 255, 255, 0.85);
  border: 1px solid var(--color-red-border);
  color: var(--color-text-main);
  font-family: var(--font-family);
  font-size: 14px;
  font-weight: 700;
  padding: 6px 14px;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all 0.2s ease;
}

.btn-share:hover {
  background: var(--color-red);
  color: #fff;
  border-color: var(--color-red);
}

.btn-share svg {
  color: var(--color-red);
}

.btn-share:hover svg {
  color: #fff;
}

/* Quick Table of Contents Bar */
.sub-nav-bar {
  background: rgba(246, 237, 227, 0.95);
  border-top: 1px solid rgba(227, 27, 33, 0.08);
  padding: 7px 0;
}

.sub-nav-inner {
  display: flex;
  align-items: center;
  gap: 18px;
  overflow-x: auto;
  white-space: nowrap;
  scrollbar-width: none;
}
.sub-nav-inner::-webkit-scrollbar {
  display: none;
}

.sub-nav-title {
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.08em;
  color: var(--color-red);
}

.sub-nav-links {
  display: flex;
  align-items: center;
  gap: 14px;
  list-style: none;
}

.nav-link {
  text-decoration: none;
  font-size: 14px;
  font-weight: 600;
  color: var(--color-text-secondary);
  padding: 4px 12px;
  border-radius: var(--radius-sm);
  transition: all 0.2s ease;
  display: flex;
  align-items: center;
  gap: 6px;
}

.nav-num {
  font-weight: 800;
  color: var(--color-red);
}

.nav-link:hover,
.nav-link.active {
  color: var(--color-red);
  background: rgba(227, 27, 33, 0.08);
}

/* ==========================================================================
   HERO / TITLE & SAPO SECTION (Hiện đại, ấn tượng, cao cấp)
   ========================================================================== */
.hero-cover {
  position: relative;
  padding-top: 56px;
  padding-bottom: 40px;
  overflow: hidden;
}

.hero-ambient-glow {
  position: absolute;
  top: -100px;
  left: 50%;
  transform: translateX(-50%);
  width: 800px;
  height: 400px;
  background: radial-gradient(ellipse, rgba(227, 27, 33, 0.08) 0%, rgba(245, 235, 225, 0) 70%);
  pointer-events: none;
}

.hero-container {
  max-width: 960px;
}

.hero-tag-wrapper {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 24px;
  flex-wrap: wrap;
}

.hero-pill-category {
  background: var(--color-red);
  color: #fff;
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.08em;
  padding: 5px 12px;
  border-radius: var(--radius-xs);
  box-shadow: 0 2px 8px var(--color-red-glow);
}

.hero-pill-issue {
  font-size: 13px;
  font-weight: 700;
  color: var(--color-text-secondary);
  letter-spacing: 0.05em;
}

/* Impressive Main Headline */
.headline-block {
  position: relative;
  margin-bottom: 28px;
  padding-left: 20px;
}

.headline-accent-bar {
  position: absolute;
  top: 6px;
  bottom: 6px;
  left: 0;
  width: 6px;
  background: linear-gradient(180deg, var(--color-red) 0%, #FF686D 100%);
  border-radius: 3px;
}

.main-headline {
  font-size: clamp(32px, 4.8vw, 54px);
  font-weight: 900;
  line-height: 1.22;
  letter-spacing: -0.035em;
  color: var(--color-text-main);
}

/* Byline Strip */
.hero-byline-strip {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-bottom: 24px;
  border-bottom: 2px solid rgba(227, 27, 33, 0.16);
  margin-bottom: 36px;
  flex-wrap: wrap;
  gap: 16px;
}

.byline-left {
  display: flex;
  align-items: center;
  gap: 12px;
}

.author-badge-circle {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--color-red), #9C0B10);
  color: #fff;
  font-weight: 800;
  font-size: 15px;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 12px var(--color-red-glow);
}

.author-info-group {
  display: flex;
  flex-direction: column;
}

.author-label {
  font-size: 11px;
  font-weight: 800;
  color: var(--color-text-muted);
  letter-spacing: 0.08em;
}

.author-name-text {
  font-size: 17px;
  font-weight: 800;
  color: var(--color-red);
}

.media-stamp {
  font-size: 13px;
  font-weight: 800;
  color: var(--color-text-secondary);
  background: rgba(255, 255, 255, 0.8);
  padding: 6px 14px;
  border-radius: var(--radius-sm);
  border: 1px solid rgba(227, 27, 33, 0.15);
}

/* Sapo Spotlight Card (Nguyên văn) */
.sapo-spotlight-card {
  position: relative;
  background: #FFFFFF;
  border-radius: var(--radius-md);
  padding: 34px 38px;
  box-shadow: var(--shadow-elevated);
  border: 1px solid rgba(227, 27, 33, 0.14);
  border-left: 6px solid var(--color-red);
  margin-bottom: 20px;
}

.sapo-quote-mark {
  position: absolute;
  top: 10px;
  right: 24px;
  font-size: 80px;
  line-height: 1;
  font-family: Georgia, serif;
  color: rgba(227, 27, 33, 0.12);
  pointer-events: none;
}

.sapo-primary-lead {
  font-size: clamp(21px, 2.4vw, 25px);
  line-height: 1.58;
  font-weight: 700;
  color: #1A1614;
  margin-bottom: 18px;
}

.sapo-accent-separator {
  width: 60px;
  height: 3px;
  background-color: var(--color-red);
  border-radius: 2px;
  margin-bottom: 18px;
}

.sapo-secondary-lead {
  font-size: clamp(18px, 2vw, 21px);
  line-height: 1.68;
  color: #4A4139;
}

/* ==========================================================================
   PROSE READING MEASURE & CHAPTER STRUCTURE
   ========================================================================== */
.longform-content-wrap {
  max-width: 100%;
  padding-bottom: 80px;
}

.story-chapter {
  margin-bottom: 50px;
}

.chapter-number-flag {
  margin-bottom: 12px;
  display: flex;
}

.flag-text {
  background: var(--color-red);
  color: #fff;
  font-size: 12px;
  font-weight: 900;
  letter-spacing: 0.12em;
  padding: 4px 10px;
  border-radius: var(--radius-xs);
}

.chapter-title {
  font-size: clamp(26px, 3.4vw, 36px);
  font-weight: 900;
  line-height: 1.3;
  letter-spacing: -0.02em;
  color: var(--color-text-main);
  margin-bottom: 28px;
  position: relative;
  padding-bottom: 16px;
}

.chapter-title::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 50px;
  height: 4px;
  background-color: var(--color-red);
  border-radius: 2px;
}

/* Reading column bounded at 760px for optimal eye movement */
.prose-column {
  max-width: var(--prose-width);
  margin-left: auto;
  margin-right: auto;
  color: var(--color-text-prose);
  font-size: var(--font-size-prose);
  line-height: var(--line-height-prose);
}

.prose-column p {
  margin-bottom: 24px;
}

.dropcap-paragraph::first-letter {
  font-size: 54px;
  line-height: 0.85;
  font-weight: 900;
  float: left;
  margin-right: 12px;
  margin-top: 5px;
  color: var(--color-red);
}

/* Author Sign Box */
.article-signature-box {
  margin-top: 32px;
  padding-top: 20px;
  border-top: 1px dashed rgba(227, 27, 33, 0.35);
  text-align: right;
}

.author-sign-name {
  font-size: 20px;
  font-weight: 900;
  color: var(--color-red);
  letter-spacing: 0.05em;
}

/* Transition Ornament */
.story-divider-ornament {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  margin: 48px auto;
  max-width: 360px;
}

.ornament-track {
  flex-grow: 1;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(227, 27, 33, 0.35), transparent);
}

.ornament-gem {
  width: 8px;
  height: 8px;
  background-color: var(--color-red);
  transform: rotate(45deg);
}

/* ==========================================================================
   BREAKOUT LAYOUT (MỞ RỘNG SANG 2 BÊN)
   Infographic & Ảnh mở rộng 1160px, vượt khỏi cột đọc 760px
   ========================================================================== */
.bleed-wide {
  width: min(100vw - 40px, 1160px);
  position: relative;
  left: 50%;
  transform: translateX(-50%);
  margin-top: 48px;
  margin-bottom: 48px;
}

/* Figure Breakout Card (NO TEXT ON IMAGE) */
.figure-breakout {
  background: #FFFFFF;
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid rgba(227, 27, 33, 0.16);
  box-shadow: var(--shadow-elevated);
}

.figure-media-box {
  width: 100%;
  aspect-ratio: 16 / 9;
  overflow: hidden;
  background: #EAE0D6;
}

.breakout-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform 0.7s cubic-bezier(0.16, 1, 0.3, 1);
}

.figure-breakout:hover .breakout-img {
  transform: scale(1.02);
}

.figure-caption-wide {
  padding: 16px 24px;
  font-size: 18px; /* Tối thiểu 18px theo yêu cầu */
  line-height: 1.6;
  color: var(--color-text-secondary);
  background: #FAF5EF;
  border-top: 1px solid rgba(0, 0, 0, 0.06);
}

.caption-index {
  font-weight: 800;
  color: var(--color-red);
  margin-right: 6px;
}

/* ==========================================================================
   INFOGRAPHIC FRAMES (Ít chữ, giàu dữ liệu, cỡ chữ >= 18px)
   ========================================================================== */
.infographic-frame {
  background: #FFFFFF;
  border-radius: var(--radius-md);
  padding: 32px 36px;
  border: 2px solid rgba(227, 27, 33, 0.22);
  box-shadow: var(--shadow-elevated);
}

.infographic-top-header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 26px;
  padding-bottom: 14px;
  border-bottom: 1px solid rgba(227, 27, 33, 0.16);
  flex-wrap: wrap;
}

.infographic-badge {
  background: var(--color-red);
  color: #fff;
  font-size: 12px;
  font-weight: 900;
  letter-spacing: 0.1em;
  padding: 4px 10px;
  border-radius: var(--radius-xs);
}

.infographic-header-title {
  font-size: 20px; /* >= 18px */
  font-weight: 900;
  color: var(--color-text-main);
  letter-spacing: 0.02em;
}

/* --- Infographic 1: Data Metrics Grid --- */
.data-metrics-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
  margin-bottom: 26px;
}

.data-metric-card {
  background: var(--color-bg-cream-tint);
  border-radius: var(--radius-sm);
  padding: 22px 20px;
  border: 1px solid rgba(227, 27, 33, 0.14);
  position: relative;
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

.metric-top-line {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--color-red), #FF858A);
}

.metric-stat-row {
  display: flex;
  align-items: baseline;
  gap: 8px;
  margin-bottom: 8px;
}

.metric-big-num {
  font-size: clamp(38px, 4.2vw, 54px);
  font-weight: 900;
  color: var(--color-red);
  line-height: 1;
  letter-spacing: -0.03em;
}

.metric-big-unit {
  font-size: 18px; /* >= 18px */
  font-weight: 800;
  color: var(--color-text-main);
  text-transform: uppercase;
}

.metric-main-label {
  font-size: 18px; /* Tối thiểu 18px */
  font-weight: 700;
  color: var(--color-text-secondary);
  line-height: 1.45;
  margin-bottom: 14px;
  flex-grow: 1;
}

.metric-data-bar {
  width: 100%;
  height: 8px;
  background: #EAE1D7;
  border-radius: 4px;
  overflow: hidden;
}

.data-fill {
  height: 100%;
  background: #2E2926;
  border-radius: 4px;
}

.data-fill.fill-red {
  background: var(--color-red);
}

/* Structure Data Strip */
.structure-data-strip {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 14px;
  padding-top: 18px;
  border-top: 1px dashed rgba(227, 27, 33, 0.2);
}

.data-strip-item {
  background: #FFFFFF;
  border: 1px solid rgba(0, 0, 0, 0.08);
  border-radius: var(--radius-sm);
  padding: 14px 18px;
  display: flex;
  align-items: center;
  gap: 12px;
}

.data-strip-item.highlight-vision {
  border-color: var(--color-red);
  background: #FFF8F8;
}

.data-pill-num {
  font-size: 24px; /* >= 18px */
  font-weight: 900;
  color: var(--color-text-main);
  line-height: 1;
}

.data-pill-num.text-red {
  color: var(--color-red);
}

.data-pill-text {
  font-size: 18px; /* Tối thiểu 18px */
  font-weight: 700;
  color: var(--color-text-secondary);
  line-height: 1.4;
}

/* --- Infographic 2: Pillars Grid --- */
.pillars-data-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 18px;
}

.pillar-data-card {
  background: var(--color-bg-cream-tint);
  border-radius: var(--radius-sm);
  padding: 22px 20px;
  border: 1px solid rgba(0, 0, 0, 0.08);
  display: flex;
  flex-direction: column;
}

.pillar-data-card.highlight-law {
  background: #FFF4F4;
  border: 2px solid var(--color-red);
}

.pillar-label-code {
  font-size: 20px; /* >= 18px */
  font-weight: 900;
  color: var(--color-text-main);
  margin-bottom: 8px;
  display: block;
}

.pillar-label-code.text-red {
  color: var(--color-red);
}

.pillar-label-core {
  font-size: 18px; /* Tối thiểu 18px */
  font-weight: 600;
  color: var(--color-text-secondary);
  line-height: 1.45;
}

/* --- Infographic 3: 4 Stages Pipeline --- */
.pipeline-stages-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.stage-step-card {
  flex: 1;
  background: var(--color-bg-cream-tint);
  border-radius: var(--radius-sm);
  padding: 20px 18px;
  border: 1px solid rgba(227, 27, 33, 0.16);
  display: flex;
  flex-direction: column;
}

.stage-step-card.highlight-step {
  background: #FFF3F3;
  border-color: var(--color-red);
}

.stage-number-icon {
  width: 38px;
  height: 38px;
  border-radius: 50%;
  background: #2D2723;
  color: #fff;
  font-size: 18px; /* >= 18px */
  font-weight: 900;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 10px;
}

.stage-number-icon.bg-red {
  background: var(--color-red);
  box-shadow: 0 4px 12px var(--color-red-glow);
}

.stage-core-name {
  font-size: 19px; /* >= 18px */
  font-weight: 800;
  color: var(--color-text-main);
  margin-bottom: 6px;
  line-height: 1.35;
}

.stage-key-focus {
  font-size: 18px; /* Tối thiểu 18px */
  font-weight: 500;
  color: var(--color-text-secondary);
  line-height: 1.45;
}

.stage-step-arrow {
  font-size: 28px;
  font-weight: 900;
  color: var(--color-red);
}

/* --- Mobile Bottom Sticky Bar --- */
.mobile-bottom-bar {
  display: none;
  position: fixed;
  bottom: 0;
  left: 0;
  width: 100%;
  background: rgba(255, 255, 255, 0.98);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-top: 1px solid rgba(227, 27, 33, 0.15);
  box-shadow: 0 -4px 16px rgba(0, 0, 0, 0.08);
  z-index: 950;
  padding: 6px 12px;
}

.mobile-bottom-bar-inner {
  display: flex;
  justify-content: space-around;
  align-items: center;
}

.m-nav-item {
  text-decoration: none;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
  color: var(--color-text-secondary);
  background: none;
  border: none;
  cursor: pointer;
  font-family: var(--font-family);
  padding: 4px 8px;
  transition: color 0.2s ease;
}

.m-nav-item:hover,
.m-nav-item.active {
  color: var(--color-red);
}

.m-nav-index {
  font-size: 13px;
  font-weight: 900;
  color: var(--color-red);
}

.m-nav-title {
  font-size: 11px;
  font-weight: 700;
}

/* Floating Top Button (Desktop) */
.floating-top-button {
  position: fixed;
  bottom: 30px;
  right: 30px;
  width: 46px;
  height: 46px;
  border-radius: 50%;
  background: var(--color-red);
  color: #fff;
  border: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
  font-weight: 900;
  box-shadow: 0 4px 16px var(--color-red-glow);
  opacity: 0;
  visibility: hidden;
  transition: all 0.3s ease;
  z-index: 850;
}

.floating-top-button.visible {
  opacity: 1;
  visibility: visible;
}

.floating-top-button:hover {
  background: var(--color-red-hover);
  transform: translateY(-3px);
}

/* Share Modal */
.share-modal {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 2000;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transition: all 0.25s ease;
}

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

.share-modal-backdrop {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.55);
}

.share-modal-box {
  position: relative;
  z-index: 10;
  background: #FFFFFF;
  border-radius: var(--radius-md);
  padding: 24px;
  width: 90%;
  max-width: 420px;
  box-shadow: 0 16px 40px rgba(0, 0, 0, 0.2);
}

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

.share-modal-top h3 {
  font-size: 18px;
  font-weight: 800;
}

.btn-close-modal {
  background: none;
  border: none;
  font-size: 24px;
  color: var(--color-text-muted);
  cursor: pointer;
}

.share-modal-sub {
  font-size: 13px;
  color: var(--color-text-secondary);
  margin-bottom: 18px;
  line-height: 1.45;
}

.share-buttons {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 8px;
}

.share-btn {
  padding: 8px 10px;
  border-radius: var(--radius-sm);
  font-family: var(--font-family);
  font-size: 12px;
  font-weight: 700;
  cursor: pointer;
  border: none;
  color: #fff;
}

.fb-btn { background: #1877F2; }
.zalo-btn { background: #0068FF; }
.copy-btn { background: #333333; }

.copy-success {
  margin-top: 12px;
  font-size: 12px;
  font-weight: 700;
  color: #1E824C;
  text-align: center;
}

/* Footer */
.vnb-longform-footer {
  background: #1C1917;
  color: #CFC5BC;
  padding-top: 40px;
  padding-bottom: 70px;
  border-top: 4px solid var(--color-red);
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
}

.footer-brand .logo-biz {
  color: #fff;
}

.footer-edition {
  font-size: 12px;
  color: #8C8276;
  margin-left: 8px;
}

.footer-copyright {
  font-size: 13px;
  color: #9C9186;
  max-width: 480px;
  line-height: 1.5;
}

.footer-copyright strong {
  color: #E6DDD4;
}

/* ==========================================================================
   RESPONSIVE DESIGN (Mobile, Tablet)
   ========================================================================== */

/* Tablet & Below (< 1180px) */
@media (max-width: 1180px) {
  .bleed-wide {
    width: 100%;
    left: 0;
    transform: none;
  }
}

/* Smaller Tablets (< 1024px) */
@media (max-width: 1024px) {
  .data-metrics-grid {
    grid-template-columns: 1fr;
  }

  .pipeline-stages-container {
    flex-direction: column;
    align-items: stretch;
  }

  .stage-step-arrow {
    display: none;
  }
}

/* Mobile Screens (< 768px) */
@media (max-width: 768px) {
  :root {
    --font-size-prose: 17.5px;
  }

  .container {
    padding-left: 16px;
    padding-right: 16px;
  }

  .reading-time-tag,
  .font-size-adjuster {
    display: none;
  }

  .hero-cover {
    padding-top: 32px;
    padding-bottom: 24px;
  }

  .main-headline {
    font-size: 26px;
    line-height: 1.25;
  }

  .sapo-spotlight-card {
    padding: 22px 18px;
  }

  .sapo-primary-lead {
    font-size: 18px;
  }

  .sapo-secondary-lead {
    font-size: 16px;
  }

  .chapter-title {
    font-size: 23px;
  }

  .prose-column {
    font-size: 17px;
    line-height: 1.8;
  }

  .dropcap-paragraph::first-letter {
    font-size: 42px;
  }

  .infographic-frame {
    padding: 20px 16px;
  }

  .figure-caption-wide {
    font-size: 16px;
    padding: 12px 16px;
  }

  .mobile-bottom-bar {
    display: block;
  }

  .floating-top-button {
    display: none;
  }

  .footer-inner {
    flex-direction: column;
    align-items: flex-start;
  }
}

/* Extra Small (< 480px) */
@media (max-width: 480px) {
  .logo-vn {
    font-size: 22px;
  }

  .logo-biz {
    font-size: 20px;
  }

  .btn-share .btn-share-label {
    display: none;
  }
}