/* ==========================================================================
   DESIGN TOKENS & PREMIUM CONFIGURATION (Style: nguyenphivan.com / fs.blog)
   ========================================================================== */
:root {
  /* Premium Modern Editorial Palette */
  --color-primary: #2C3E2B;       /* Xanh lá rừng thông đậm - Nông nghiệp & Bền vững */
  --color-primary-light: #3D593C; /* Xanh lá sáng hơn cho hover */
  --color-secondary: #D35400;     /* Cam đất nung / Cam hạt cà phê chín */
  --color-secondary-light: #E67E22; /* Cam sáng hơn cho hover */
  --color-accent: #8D7663;        /* Warm Sand / Cát ấm */
  --color-accent-light: #FAF9F6;  /* Tông nền phụ ngà ấm */
  
  --color-bg-main: #FAF9F6;       /* Trắng ngà ấm áp/vải thô - thân thiện với mắt */
  --color-bg-card: #FFFFFF;       /* Nền trắng cho các thẻ nổi bật */
  --color-bg-section: #F3EFE9;    /* Tông xám ngà dịu nhẹ làm nền đệm */
  --color-bg-ticker: #EBE4D8;     /* Màu cho thanh bảng giá */
  
  --color-text-primary: #1C241D;  /* Xanh lá cây đen cực sẫm - sang trọng và dễ đọc */
  --color-text-muted: #566056;    /* Xám thông nhạt cho mô tả */
  --color-text-light: #FAF9F6;    /* Chữ sáng trên nền tối */
  
  --color-border: #E3DDD4;        /* Đường viền ấm nhạt */
  --color-border-hover: #C9BFAF;  /* Đường viền sẫm màu khi di chuột */
  
  /* Gradients chuyên nghiệp */
  --gradient-primary: linear-gradient(135deg, #2C3E2B 0%, #1A281A 100%);
  --gradient-secondary: linear-gradient(135deg, #D35400 0%, #E67E22 100%);
  --gradient-accent: linear-gradient(135deg, #2C3E2B 0%, #D35400 100%);
  --gradient-soft: linear-gradient(180deg, #FAF9F6 0%, #F3EFE9 100%);
  
  --font-sans: "Inter", "Roboto", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --font-serif: var(--font-sans);
  
  --transition-smooth: all 0.35s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-fast: all 0.2s ease;
  
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 16px;
  --radius-pill: 9999px;
  
  --max-width: 1140px;
  --shadow-premium: 0 10px 30px -10px rgba(44, 62, 43, 0.05), 0 1px 3px rgba(44, 62, 43, 0.01);
  --shadow-hover: 0 20px 40px -15px rgba(211, 84, 0, 0.12), 0 1px 5px rgba(211, 84, 0, 0.02);
}

/* ==========================================================================
   BILINGUAL MECHANISM (I18N)
   ========================================================================== */
html[data-lang="vi"] [data-en]:not([data-vi]) { display: none !important; }
html[data-lang="en"] [data-vi]:not([data-en]) { display: none !important; }

/* Placeholder updates for bilingual translation */
html[data-lang="vi"] input::placeholder { content: attr(data-vi-placeholder); }
html[data-lang="en"] input::placeholder { content: attr(data-en-placeholder); }

/* ==========================================================================
   RESET & FOUNDATIONS
   ========================================================================== */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  background-color: var(--color-bg-main);
}

body {
  font-family: var(--font-sans);
  color: var(--color-text-muted);
  background-color: var(--color-bg-main);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

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

a:hover {
  color: var(--color-primary);
}

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

h1, h2, h3, h4 {
  font-family: var(--font-serif);
  color: var(--color-text-primary);
  font-weight: 700;
  line-height: 1.3;
}

/* ==========================================================================
   REUSABLE UTILITIES & BUTTONS
   ========================================================================== */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

.section-label {
  font-family: var(--font-sans);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--color-secondary);
  margin-bottom: 12px;
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.section-label::before {
  content: "";
  display: block;
  width: 16px;
  height: 2px;
  background-color: var(--color-secondary);
}

.section-title {
  font-size: clamp(1.75rem, 4vw, 2.35rem);
  margin-bottom: 16px;
  font-weight: 700;
  color: var(--color-primary);
  letter-spacing: -0.01em;
}

.section-desc {
  font-size: 1rem;
  color: var(--color-text-muted);
  max-width: 700px;
  margin-bottom: 40px;
}

.section-header {
  margin-bottom: 40px;
}

.section-header.center {
  text-align: center;
}

.section-header.center .section-desc {
  margin-left: auto;
  margin-right: auto;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 24px;
  border-radius: var(--radius-md);
  font-size: 0.875rem;
  font-weight: 600;
  cursor: pointer;
  border: none;
  transition: var(--transition-smooth);
}

.btn--primary {
  background: var(--gradient-secondary);
  color: #fff;
}

.btn--primary:hover {
  background: linear-gradient(135deg, var(--color-secondary-light) 0%, var(--color-secondary) 100%);
  transform: translateY(-2px);
  box-shadow: 0 6px 16px rgba(211, 84, 0, 0.35);
}

.btn--outline {
  background-color: transparent;
  color: var(--color-text-primary);
  border: 1.5px solid var(--color-primary);
}

.btn--outline:hover {
  background: var(--gradient-primary);
  color: #fff;
  border-color: var(--color-primary);
  transform: translateY(-2px);
  box-shadow: 0 6px 16px rgba(44, 62, 43, 0.25);
}

.tag {
  display: inline-block;
  padding: 4px 12px;
  border-radius: var(--radius-pill);
  font-size: 0.7rem;
  font-weight: 600;
  background-color: var(--color-bg-section);
  color: var(--color-text-muted);
}

.tag--accent {
  background-color: rgba(200, 90, 23, 0.08);
  color: var(--color-secondary);
}

.tag--blue {
  background-color: rgba(44, 62, 43, 0.08);
  color: var(--color-primary);
}

/* ==========================================================================
   HEADER & NAVIGATION
   ========================================================================== */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 100;
  background-color: rgba(252, 250, 247, 0.9);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
  transition: var(--transition-smooth);
}

.site-header.scrolled {
  background-color: rgba(252, 250, 247, 0.98);
  box-shadow: 0 4px 20px rgba(44, 62, 43, 0.04);
}

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

.nav-logo {
  display: flex;
  flex-direction: column;
  text-decoration: none;
}

.nav-logo__name {
  font-family: var(--font-serif);
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-primary);
  letter-spacing: -0.01em;
}

.nav-logo__sub {
  font-size: 0.65rem;
  color: var(--color-accent);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  font-weight: 700;
  margin-top: 2px;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 4px;
}

.nav-links a {
  color: var(--color-text-muted);
  font-size: 0.875rem;
  font-weight: 600;
  padding: 8px 16px;
  border-radius: var(--radius-pill);
  transition: var(--transition-fast);
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--color-primary);
  background-color: rgba(44, 62, 43, 0.05);
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 16px;
}

.lang-toggle {
  display: flex;
  background-color: rgba(44, 62, 43, 0.04);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-pill);
  padding: 2px;
}

.lang-btn {
  background: none;
  border: none;
  color: var(--color-text-muted);
  font-size: 0.725rem;
  font-weight: 700;
  padding: 4px 10px;
  border-radius: var(--radius-pill);
  cursor: pointer;
  transition: var(--transition-fast);
}

.lang-btn.active {
  background-color: var(--color-secondary);
  color: #fff;
}

.nav-hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
}

.nav-hamburger span {
  display: block;
  width: 22px;
  height: 2px;
  background-color: var(--color-primary);
  transition: var(--transition-smooth);
}

/* Hamburger animations */
.nav-hamburger.open span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
.nav-hamburger.open span:nth-child(2) {
  opacity: 0;
}
.nav-hamburger.open span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* Mobile Menu */
.mobile-menu {
  display: none;
  flex-direction: column;
  background-color: var(--color-bg-main);
  border-bottom: 1px solid var(--color-border);
  padding: 20px 24px;
  gap: 16px;
}

.mobile-menu a {
  font-size: 0.95rem;
  color: var(--color-text-primary);
  font-weight: 600;
  padding: 8px 0;
  border-bottom: 1px solid var(--color-border);
}

.mobile-menu a:last-child {
  border-bottom: none;
}

/* ==========================================================================
   TICKER WIDGET SECTION
   ========================================================================== */
.ticker-bar {
  margin-top: 80px; /* Offset fixed header */
  background-color: var(--color-bg-ticker);
  border-bottom: 1px solid var(--color-border);
  padding: 8px 0;
  overflow: hidden;
}

.ticker-container {
  display: flex;
  align-items: center;
  justify-content: flex-start;
  gap: 40px;
  overflow-x: auto;
  white-space: nowrap;
  scrollbar-width: none;
}

.ticker-container::-webkit-scrollbar {
  display: none;
}

.ticker-item {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.775rem;
  font-weight: 500;
}

.ticker-symbol {
  color: var(--color-text-muted);
  font-weight: 600;
}

.ticker-price {
  font-family: monospace;
  font-weight: 700;
}

.ticker-price.up {
  color: #1B8C46;
}

.ticker-price.down {
  color: #D33A2C;
}

/* ==========================================================================
   HERO SECTION
   ========================================================================== */
.hero {
  position: relative;
  padding: 60px 0;
  min-height: calc(100vh - 120px);
  display: flex;
  align-items: center;
  overflow: hidden;
}

.hero-grid-pattern {
  position: absolute;
  inset: 0;
  background-image: 
    linear-gradient(rgba(200, 90, 23, 0.02) 1px, transparent 1px),
    linear-gradient(90deg, rgba(200, 90, 23, 0.02) 1px, transparent 1px);
  background-size: 40px 40px;
  pointer-events: none;
}

.hero__inner {
  position: relative;
  z-index: 2;
}

.hero__grid {
  display: grid;
  grid-template-columns: 1.25fr 0.75fr;
  gap: 60px;
  align-items: center;
}

.hero__eyebrow {
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--color-secondary);
  letter-spacing: 0.15em;
  margin-bottom: 16px;
}

.hero__title {
  font-size: clamp(2rem, 5vw, 3rem);
  line-height: 1.2;
  letter-spacing: -0.015em;
  margin-bottom: 20px;
}

.hero__title .accent {
  color: var(--color-secondary);
}

.hero__desc {
  font-size: 1.05rem;
  color: var(--color-text-muted);
  max-width: 580px;
  margin-bottom: 32px;
}

/* Subscription Box inside Hero */
.newsletter-box {
  background-color: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-top: 3px solid var(--color-secondary);
  padding: 28px;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-premium);
  max-width: 580px;
}

.newsletter-title {
  font-size: 1.15rem;
  margin-bottom: 6px;
}

.newsletter-desc {
  font-size: 0.85rem;
  color: var(--color-text-muted);
  margin-bottom: 16px;
}

.newsletter-form {
  display: flex;
  gap: 10px;
}

.newsletter-input {
  flex: 1;
  background-color: var(--color-bg-main);
  border: 1px solid var(--color-border);
  padding: 12px 18px;
  border-radius: var(--radius-md);
  color: var(--color-text-primary);
  font-size: 0.875rem;
  transition: var(--transition-fast);
}

.newsletter-input:focus {
  outline: none;
  border-color: var(--color-secondary);
  background-color: #fff;
}

/* Portrait Visuals */
.hero__visual {
  display: flex;
  justify-content: center;
  align-items: center;
}

.portrait-wrapper {
  position: relative;
  width: 100%;
  max-width: 360px;
}

.portrait-wrapper::before {
  content: "";
  position: absolute;
  inset: 12px -12px -12px 12px;
  background-color: var(--color-bg-section);
  border-radius: var(--radius-lg);
  pointer-events: none;
  z-index: 1;
  border: 1px solid var(--color-border);
}

.portrait-img {
  width: 100%;
  aspect-ratio: 1;
  object-fit: cover;
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  position: relative;
  z-index: 2;
  box-shadow: var(--shadow-premium);
}

.portrait-badge {
  position: absolute;
  bottom: -10px;
  left: -20px;
  background-color: var(--color-primary);
  border: 1px solid rgba(255, 255, 255, 0.05);
  padding: 12px 20px;
  border-radius: var(--radius-md);
  box-shadow: 0 8px 24px rgba(44, 62, 43, 0.15);
  z-index: 3;
  text-align: center;
  line-height: 1.25;
}

.portrait-badge strong {
  display: block;
  font-size: 1.25rem;
  color: var(--color-secondary);
  font-weight: 800;
}

.portrait-badge span {
  font-size: 0.65rem;
  color: var(--color-text-light);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* ==========================================================================
   ABOUT & BIO SECTION
   ========================================================================== */
.about {
  padding: 80px 0;
  background-color: var(--color-bg-section);
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}

.about__grid {
  display: grid;
  grid-template-columns: 0.95fr 1.05fr;
  gap: 50px;
  align-items: center;
}

.about__quote-box {
  background-color: var(--color-bg-card);
  border: 1px solid var(--color-border);
  padding: 40px;
  border-radius: var(--radius-lg);
  position: relative;
  box-shadow: var(--shadow-premium);
}

.quote-icon {
  position: absolute;
  top: 0px;
  left: 20px;
  font-size: 5rem;
  font-family: var(--font-serif);
  color: rgba(200, 90, 23, 0.08);
  line-height: 1;
}

.quote-text {
  font-size: 1.15rem;
  font-style: italic;
  font-weight: 400;
  line-height: 1.6;
  margin-bottom: 20px;
  position: relative;
  z-index: 2;
  color: var(--color-text-primary);
}

.quote-author {
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--color-secondary);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.about-bio {
  color: var(--color-text-muted);
  font-size: 0.975rem;
  line-height: 1.7;
  margin-bottom: 28px;
}

.about__stats {
  display: flex;
  gap: 32px;
}

.stat {
  display: flex;
  flex-direction: column;
}

.stat__num {
  font-size: 2rem;
  font-weight: 800;
  color: var(--color-primary);
  line-height: 1;
}

.stat__num .unit {
  font-size: 0.9rem;
  color: var(--color-secondary);
  font-weight: 700;
}

.stat__label {
  font-size: 0.725rem;
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-weight: 700;
  margin-top: 6px;
}

/* ==========================================================================
   MARKET OVERVIEW SPARKLINE WIDGET
   ========================================================================== */
.market-overview {
  padding: 80px 0;
  background-color: var(--color-bg-main);
}

.market-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 24px;
}

.market-card {
  background-color: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 24px;
  display: flex;
  flex-direction: column;
  transition: var(--transition-smooth);
  box-shadow: var(--shadow-premium);
  position: relative;
}

.market-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-hover);
  border-color: var(--color-border-hover);
}

.market-card__header {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  margin-bottom: 12px;
  border-bottom: 1px solid var(--color-border);
  padding-bottom: 8px;
}

.market-card__symbol {
  font-family: var(--font-sans);
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--color-primary);
}

.market-card__name {
  font-size: 0.725rem;
  color: var(--color-text-muted);
  font-weight: 600;
}

.market-card__body {
  display: flex;
  flex-direction: column;
  margin-bottom: 8px;
}

.market-card__price {
  font-family: monospace;
  font-size: 1.65rem;
  font-weight: 700;
  color: var(--color-text-primary);
  line-height: 1.2;
}

.market-card__change {
  font-size: 0.8rem;
  font-weight: 700;
  margin-top: 4px;
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.market-card__change.up {
  color: #1B8C46;
}

.market-card__change.down {
  color: #D33A2C;
}

.market-card__chart {
  width: 100%;
  height: 50px;
  margin-top: auto;
}

.market-card__chart svg {
  width: 100%;
  height: 100%;
  overflow: visible;
}

/* ==========================================================================
   3 CORE PILLARS SECTION (Style: nguyenphivan.com)
   ========================================================================== */
.pillars {
  padding: 80px 0;
  background-color: var(--color-bg-section);
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}

.pillars-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}

.pillar-card {
  background-color: var(--color-bg-card);
  border: 1px solid var(--color-border);
  padding: 40px 32px;
  border-radius: var(--radius-lg);
  transition: var(--transition-smooth);
  display: flex;
  flex-direction: column;
  position: relative;
  overflow: hidden;
  box-shadow: var(--shadow-premium);
}

.pillar-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background-color: transparent;
  transition: var(--transition-fast);
}

.pillar-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-hover);
  border-color: var(--color-border-hover);
}

.pillar-card:hover::before {
  background-color: var(--color-secondary);
}

.pillar-icon-wrapper {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-md);
  background-color: var(--color-accent-light);
  color: var(--color-secondary);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 24px;
}

.pillar-card__title {
  font-family: var(--font-serif);
  font-size: 1.25rem;
  color: var(--color-primary);
  margin-bottom: 16px;
  font-weight: 700;
}

.pillar-card__desc {
  font-size: 0.9rem;
  color: var(--color-text-muted);
  line-height: 1.65;
  flex-grow: 1;
  margin-bottom: 24px;
}

.pillar-bullet-list {
  list-style: none;
  padding: 0;
  margin: 0;
  border-top: 1px solid var(--color-border);
  padding-top: 20px;
}

.pillar-bullet-list li {
  font-size: 0.825rem;
  color: var(--color-text-primary);
  margin-bottom: 10px;
  position: relative;
  padding-left: 16px;
  font-weight: 500;
}

.pillar-bullet-list li:last-child {
  margin-bottom: 0;
}

.pillar-bullet-list li::before {
  content: "•";
  color: var(--color-secondary);
  position: absolute;
  left: 0;
  font-weight: bold;
}

/* ==========================================================================
   ZALO COMMUNITY CALL TO ACTION
   ========================================================================== */
.zalo-cta-wrapper {
  margin: 20px 0;
}

.zalo-btn {
  background-color: #0068FF;
  color: #fff !important;
  border: 1px solid #0056D2;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 32px;
  border-radius: var(--radius-pill);
  font-weight: 700;
  font-size: 0.95rem;
  box-shadow: 0 4px 14px rgba(0, 104, 255, 0.25);
  transition: var(--transition-smooth);
  cursor: pointer;
}

.zalo-btn:hover {
  background-color: #0056D2;
  border-color: #004BB8;
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(0, 104, 255, 0.4);
}

/* ==========================================================================
   SERVICES SECTION
   ========================================================================== */
.services {
  padding: 80px 0;
  background-color: var(--color-bg-section);
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}

.services__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.service-card {
  background-color: var(--color-bg-card);
  border: 1px solid var(--color-border);
  padding: 36px 32px;
  border-radius: var(--radius-lg);
  transition: var(--transition-smooth);
  box-shadow: var(--shadow-premium);
}

.service-card:hover {
  transform: translateY(-6px);
  border-color: var(--color-secondary);
  box-shadow: var(--shadow-hover);
}

.service-card__icon {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-md);
  background-color: rgba(200, 90, 23, 0.08);
  color: var(--color-secondary);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
}

.service-card__title {
  font-size: 1.2rem;
  margin-bottom: 12px;
  color: var(--color-primary);
}

.service-card__desc {
  color: var(--color-text-muted);
  font-size: 0.875rem;
  line-height: 1.6;
}

/* ==========================================================================
   BLOG / INSIGHTS SECTION
   ========================================================================== */
.blog {
  padding: 80px 0;
  background-color: var(--color-bg-main);
}

.blog__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.blog-card {
  background-color: var(--color-bg-card);
  border: 1px solid var(--color-border);
  padding: 24px;
  border-radius: var(--radius-lg);
  transition: var(--transition-smooth);
  display: flex;
  flex-direction: column;
  box-shadow: var(--shadow-premium);
  overflow: hidden;
}

.blog-card:hover {
  border-color: var(--color-secondary);
  box-shadow: var(--shadow-hover);
  transform: translateY(-6px);
}

.blog-card__image-container {
  width: 100%;
  aspect-ratio: 16 / 10;
  border-radius: var(--radius-md);
  overflow: hidden;
  margin-bottom: 20px;
  border: 1px solid var(--color-border);
}

.blog-card__image {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: var(--transition-smooth);
}

.blog-card:hover .blog-card__image {
  transform: scale(1.04);
}

.blog-card__meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 16px;
}

.blog-card__date {
  font-size: 0.75rem;
  color: var(--color-text-muted);
  font-weight: 600;
}

.blog-card__tags {
  display: flex;
  gap: 6px;
}

.blog-card__title {
  font-size: 1.15rem;
  line-height: 1.45;
  margin-bottom: 12px;
  font-weight: 700;
}

.blog-card__title a {
  color: var(--color-text-primary);
  transition: var(--transition-fast);
}

.blog-card__title a:hover {
  color: var(--color-secondary);
}

.blog-card__desc {
  color: var(--color-text-muted);
  font-size: 0.875rem;
  line-height: 1.6;
  margin-bottom: 20px;
  flex-grow: 1;
}

.blog-card__link {
  font-size: 0.875rem;
  font-weight: 700;
  color: var(--color-secondary);
  display: inline-flex;
  align-items: center;
  transition: var(--transition-fast);
}

.blog-card__link:hover {
  transform: translateX(4px);
  color: var(--color-primary);
}

/* ==========================================================================
   PORTFOLIO & ECOSYSTEM
   ========================================================================== */
.portfolio {
  padding: 80px 0;
  background-color: var(--color-bg-section);
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}

.portfolio__grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 32px;
}

.portfolio-card {
  background-color: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: var(--transition-smooth);
  box-shadow: var(--shadow-premium);
}

.portfolio-card:hover {
  transform: translateY(-4px);
  border-color: var(--color-secondary);
  box-shadow: var(--shadow-hover);
}

.portfolio-card__thumb {
  height: 180px;
  display: flex;
  align-items: center;
  justify-content: center;
  background-size: cover;
  background-position: center;
  border-bottom: 1px solid var(--color-border);
}

.portfolio-card__body {
  padding: 28px;
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.portfolio-card__tags {
  display: flex;
  gap: 8px;
}

.portfolio-card__title {
  font-size: 1.25rem;
  color: var(--color-text-primary);
}

.portfolio-card__desc {
  color: var(--color-text-muted);
  font-size: 0.875rem;
  line-height: 1.6;
  flex: 1;
}

.portfolio-card__body .btn {
  align-self: flex-start;
  margin-top: 8px;
}

/* ==========================================================================
   CONTACT SECTION
   ========================================================================== */
.contact {
  padding: 80px 0;
  background-color: var(--color-bg-main);
}

.contact__grid {
  display: grid;
  grid-template-columns: 1fr;
  text-align: center;
  max-width: 600px;
  margin: 0 auto;
}

.contact__info {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 20px;
}

.contact-subtitle {
  color: var(--color-text-muted);
  font-size: 1.05rem;
}

.contact-details {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin: 12px 0;
}

.contact-item {
  font-size: 1.05rem;
  color: var(--color-text-primary);
  font-weight: 500;
}

.contact-item a {
  color: var(--color-secondary);
  font-weight: 700;
}

.social-links {
  display: flex;
  gap: 12px;
  margin-top: 12px;
}

.social-icon {
  background-color: var(--color-bg-card);
  border: 1px solid var(--color-border);
  color: var(--color-text-primary);
  padding: 10px 20px;
  border-radius: var(--radius-pill);
  font-size: 0.8rem;
  font-weight: 600;
  transition: var(--transition-smooth);
}

.social-icon:hover {
  background-color: var(--color-primary);
  color: #fff;
  border-color: var(--color-primary);
  transform: translateY(-2px);
}

/* ==========================================================================
   FOOTER
   ========================================================================== */
.footer {
  background-color: var(--color-primary);
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  padding: 28px 0;
}

.footer-container {
  text-align: center;
  font-size: 0.8rem;
  color: rgba(255, 255, 255, 0.6);
}

.footer-container span {
  color: #fff;
  font-weight: 700;
}

/* ==========================================================================
   RESPONSIVE MEDIA QUERIES
   ========================================================================== */
@media (max-width: 992px) {
  .hero__grid {
    grid-template-columns: 1fr;
    gap: 40px;
    text-align: center;
  }
  
  .hero__visual {
    order: -1;
  }
  
  .portrait-wrapper {
    margin: 0 auto;
  }
  
  .hero__desc,
  .newsletter-box {
    margin-left: auto;
    margin-right: auto;
  }
  
  .about__grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }
  
  .pillars-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .services__grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .blog__grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .nav-links {
    display: none;
  }
  
  .nav-hamburger {
    display: flex;
  }
  
  .site-header.menu-open .mobile-menu {
    display: flex;
  }
  
  .pillars-grid,
  .services__grid,
  .blog__grid,
  .portfolio__grid {
    grid-template-columns: 1fr;
  }
  
  .newsletter-form {
    flex-direction: column;
  }
  
  .portrait-badge {
    left: 0;
    right: auto;
    bottom: -10px;
  }
}

@media (max-width: 480px) {
  .about__stats {
    flex-direction: column;
    gap: 16px;
  }
}

/* ==========================================================================
   SUBPAGES GLOBAL LAYOUTS & CONTAINERS
   ========================================================================== */
.page-container {
  padding-top: 140px; /* Offset for fixed header + breathing room */
  padding-bottom: 100px;
  background-color: var(--color-bg-main);
  min-height: 80vh;
}

.page-header {
  margin-bottom: 50px;
}

.page-header.center {
  text-align: center;
}

.page-title {
  font-size: clamp(2rem, 5vw, 2.75rem);
  color: var(--color-primary);
  margin-bottom: 16px;
  font-weight: 700;
  letter-spacing: -0.015em;
}

.page-subtitle {
  font-size: 1.1rem;
  color: var(--color-text-muted);
  max-width: 760px;
  line-height: 1.7;
}

.page-header.center .page-subtitle {
  margin-left: auto;
  margin-right: auto;
}

/* ==========================================================================
   BIOGRAPHY PAGE LAYOUT (.about.html)
   ========================================================================== */
.bio-layout-grid {
  display: grid;
  grid-template-columns: 320px 1fr;
  gap: 60px;
  align-items: start;
}

.bio-sticky-card {
  position: sticky;
  top: 120px;
  background-color: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 28px;
  box-shadow: var(--shadow-premium);
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.bio-avatar-frame {
  width: 100%;
  aspect-ratio: 1;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-premium);
}

.bio-avatar-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: var(--transition-smooth);
}

.bio-avatar-frame:hover .bio-avatar-img {
  transform: scale(1.05);
}

.bio-meta-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
  padding: 20px 0;
}

.bio-meta-item {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.meta-label {
  font-size: 0.725rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-text-muted);
  font-weight: 700;
}

.meta-val {
  font-size: 0.95rem;
  color: var(--color-text-primary);
  font-weight: 600;
}

.bio-stats-cards {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
}

.bio-stat-card {
  background-color: var(--color-bg-section);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 16px;
  text-align: center;
}

.bio-stat-card h3 {
  font-size: 1.75rem;
  color: var(--color-secondary);
  font-weight: 800;
  line-height: 1;
  margin-bottom: 6px;
}

.bio-stat-card p {
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-text-muted);
}

/* Narrative Story Styling */
.bio-story-content {
  display: flex;
  flex-direction: column;
  gap: 40px;
}

.bio-large-quote {
  border-left: 4px solid var(--color-secondary);
  padding-left: 32px;
  margin: 0;
}

.bio-large-quote p {
  font-family: var(--font-serif);
  font-size: 1.35rem;
  font-style: italic;
  line-height: 1.7;
  color: var(--color-text-primary);
  margin-bottom: 16px;
}

.bio-large-quote cite {
  font-family: var(--font-sans);
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--color-secondary);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-style: normal;
}

.bio-narrative-section h2,
.bio-values-section h2 {
  font-size: 1.75rem;
  color: var(--color-primary);
  margin-bottom: 30px;
  border-bottom: 2px solid var(--color-border);
  padding-bottom: 12px;
}

.bio-timeline-step {
  display: flex;
  gap: 24px;
  margin-bottom: 32px;
}

.bio-timeline-step:last-child {
  margin-bottom: 0;
}

.step-num {
  font-family: monospace;
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-secondary);
  background-color: var(--color-accent-light);
  width: 44px;
  height: 44px;
  border-radius: var(--radius-pill);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  border: 1px solid var(--color-border);
}

.step-body h3 {
  font-size: 1.2rem;
  color: var(--color-text-primary);
  margin-bottom: 10px;
  font-weight: 700;
}

.step-body p {
  font-size: 0.95rem;
  color: var(--color-text-muted);
  line-height: 1.7;
}

.values-flex {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.value-block {
  background-color: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 28px;
  box-shadow: var(--shadow-premium);
}

.value-block h4 {
  font-family: var(--font-serif);
  font-size: 1.15rem;
  color: var(--color-secondary);
  margin-bottom: 12px;
}

.value-block p {
  font-size: 0.85rem;
  color: var(--color-text-muted);
  line-height: 1.65;
}

/* ==========================================================================
   COURSES PAGE LAYOUT (.courses.html)
   ========================================================================== */
.course-grid {
  display: grid;
  grid-template-columns: 360px 1fr;
  gap: 60px;
  align-items: start;
  margin-bottom: 60px;
}

.course-visual-card {
  background-color: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 32px;
  box-shadow: var(--shadow-premium);
  display: flex;
  flex-direction: column;
  gap: 24px;
  position: sticky;
  top: 120px;
}

.course-badge-tag {
  align-self: flex-start;
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  background-color: rgba(200, 90, 23, 0.08);
  color: var(--color-secondary);
  padding: 6px 12px;
  border-radius: var(--radius-pill);
}

.course-thumb-gradient {
  height: 180px;
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-premium);
}

.course-quick-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
  padding: 20px 0;
}

.c-stat {
  display: flex;
  flex-direction: column;
  text-align: center;
}

.c-stat__num {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--color-primary);
  line-height: 1.2;
}

.c-stat__lbl {
  font-size: 0.65rem;
  color: var(--color-text-muted);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.02em;
  margin-top: 4px;
}

.block-btn {
  width: 100%;
  text-align: center;
  padding: 12px 24px;
}

.course-intro-para {
  font-size: 1.1rem;
  line-height: 1.75;
  color: var(--color-text-muted);
  margin-bottom: 36px;
}

.course-text-info h2 {
  font-size: 2rem;
  color: var(--color-primary);
  margin-bottom: 20px;
  font-weight: 700;
}

.course-text-info h3 {
  font-size: 1.45rem;
  color: var(--color-primary);
  margin-bottom: 24px;
  border-bottom: 1px solid var(--color-border);
  padding-bottom: 10px;
}

.curriculum-steps {
  display: flex;
  flex-direction: column;
  gap: 28px;
}

.curr-step {
  display: flex;
  gap: 20px;
}

.curr-step h4 {
  font-family: monospace;
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--color-secondary);
  background-color: var(--color-accent-light);
  width: 32px;
  height: 32px;
  border-radius: var(--radius-pill);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  border: 1px solid var(--color-border);
}

.curr-step h5 {
  font-size: 1.05rem;
  color: var(--color-text-primary);
  margin-bottom: 6px;
  font-weight: 700;
}

.curr-step p {
  font-size: 0.875rem;
  color: var(--color-text-muted);
  line-height: 1.6;
}

.additional-programs {
  border-top: 1px solid var(--color-border);
  padding-top: 60px;
  margin-top: 60px;
}

.programs-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 32px;
  margin-top: 40px;
}

.program-card {
  background-color: var(--color-bg-card);
  border: 1px solid var(--color-border);
  padding: 40px 32px;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-premium);
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.program-card h3 {
  font-size: 1.3rem;
  color: var(--color-primary);
}

.program-card p {
  font-size: 0.9rem;
  color: var(--color-text-muted);
  line-height: 1.65;
  flex-grow: 1;
}

.program-cta, .program-status {
  align-self: flex-start;
  margin-top: 12px;
}

.status-badge {
  font-size: 0.725rem;
  font-weight: 700;
  color: var(--color-accent);
  background-color: var(--color-accent-light);
  padding: 6px 14px;
  border-radius: var(--radius-pill);
  border: 1px solid var(--color-border);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* ==========================================================================
   BLOG INDEX PAGE (.blog.html)
   ========================================================================== */
.blog-filters {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 30px;
  border-bottom: 1px solid var(--color-border);
  padding-bottom: 24px;
}

.filter-btn {
  background-color: var(--color-bg-card);
  border: 1px solid var(--color-border);
  padding: 8px 20px;
  border-radius: var(--radius-pill);
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--color-text-muted);
  cursor: pointer;
  transition: var(--transition-smooth);
}

.filter-btn:hover,
.filter-btn.active {
  background-color: var(--color-secondary);
  color: #fff;
  border-color: var(--color-secondary);
}

/* ==========================================================================
   COMMUNITY PAGE LAYOUT (.community.html)
   ========================================================================== */
.channels-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 32px;
  margin-bottom: 60px;
}

.channel-card {
  background-color: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-premium);
  display: flex;
  flex-direction: column;
}

.channel-header-visual {
  height: 140px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.channel-header-visual.yt-brand {
  background-color: #E62117;
}

.channel-header-visual.zalo-brand {
  background-color: #0068FF;
}

.channel-body {
  padding: 36px;
  flex-grow: 1;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.channel-body h2 {
  font-size: 1.45rem;
  color: var(--color-primary);
}

.channel-body p {
  font-size: 0.9rem;
  color: var(--color-text-muted);
  line-height: 1.7;
  flex-grow: 1;
}

.channel-stats {
  display: flex;
  gap: 32px;
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
  padding: 16px 0;
}

.ch-stat {
  display: flex;
  flex-direction: column;
}

.ch-stat strong {
  font-size: 1.15rem;
  color: var(--color-text-primary);
}

.ch-stat span {
  font-size: 0.65rem;
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-weight: 700;
  margin-top: 2px;
}

.community-mission {
  background-color: var(--color-bg-section);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 50px;
  margin-bottom: 60px;
  box-shadow: var(--shadow-premium);
}

.mission-text-box h2 {
  font-size: 1.65rem;
  color: var(--color-primary);
  margin-bottom: 16px;
}

.mission-text-box p {
  font-size: 1rem;
  color: var(--color-text-muted);
  line-height: 1.75;
  margin-bottom: 20px;
}

.mission-text-box p:last-child {
  margin-bottom: 0;
}

.community-rules {
  border-top: 1px solid var(--color-border);
  padding-top: 60px;
}

.rules-grid-three {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
  margin-top: 40px;
}

.rule-item {
  background-color: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 32px 28px;
  box-shadow: var(--shadow-premium);
}

.rule-item h4 {
  font-size: 1.1rem;
  color: var(--color-primary);
  margin-bottom: 12px;
}

.rule-item p {
  font-size: 0.85rem;
  color: var(--color-text-muted);
  line-height: 1.65;
}

/* ==========================================================================
   SUBPAGES RESPONSIVE BREAKPOINTS
   ========================================================================== */
@media (max-width: 992px) {
  .bio-layout-grid,
  .course-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }
  
  .bio-sticky-card,
  .course-visual-card {
    position: static;
    max-width: 500px;
    margin: 0 auto;
  }
  
  .programs-grid,
  .channels-grid {
    grid-template-columns: 1fr;
    gap: 28px;
  }
  
  .values-flex,
  .rules-grid-three {
    grid-template-columns: 1fr;
    gap: 20px;
  }
}

/* ==========================================================================
   ARTICLE BANNER STYLING FOR POSTS
   ========================================================================== */
.article-banner {
  width: 100%;
  aspect-ratio: 16 / 7;
  border-radius: var(--radius-lg);
  overflow: hidden;
  margin-top: 24px;
  margin-bottom: 40px;
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-premium);
}

.article-banner-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: var(--transition-smooth);
}

.article-banner:hover .article-banner-img {
  transform: scale(1.02);
}