/* ---------- Reset & Variables (Tết Gold-Red palette from QH88 logo) ---------- */
:root {
  --c-bg: #1a0d1f;            /* dark plum (warmer than navy) */
  --c-bg-2: #2a1424;          /* burgundy-plum for sections */
  --c-bg-3: #3b1818;          /* deep burgundy for accent sections */
  --c-card: #2d1a26;          /* warm card */
  --c-card-hover: #3a2230;    /* card hover */
  --c-border: #4a2d3a;        /* warm border */
  --c-border-gold: #6b4a2a;   /* subtle gold border */

  --c-text: #fff4e0;          /* cream white */
  --c-text-bright: #ffffff;
  --c-text-mute: #c9a89a;     /* warm muted (was cool gray) */
  --c-text-dim: #8a6b5e;

  --c-gold: #f0b428;           /* vibrant gold from logo */
  --c-gold-light: #ffd966;    /* bright gold highlight */
  --c-gold-bright: #fff4d4;   /* metallic sheen */
  --c-gold-dark: #c8941f;     /* gold gradient end */
  --c-gold-deep: #8b6914;     /* deepest gold for stroke */

  --c-red: #dc2626;            /* lucky Tết red */
  --c-red-bright: #ef4444;
  --c-red-deep: #991b1b;

  --c-green: #16a34a;
  --c-blue: #3b82f6;

  --r-sm: 8px;
  --r-md: 14px;
  --r-lg: 22px;

  --shadow-card: 0 6px 32px rgba(0,0,0,0.45);
  --shadow-gold: 0 8px 28px rgba(240,180,40,0.42), 0 2px 8px rgba(220,38,38,0.2);
  --shadow-gold-strong: 0 12px 40px rgba(240,180,40,0.55), 0 4px 12px rgba(220,38,38,0.3);
  --shadow-red: 0 8px 28px rgba(220,38,38,0.4);

  --grad-gold: linear-gradient(135deg, #fff4d4 0%, #ffd966 30%, #f0b428 55%, #c8941f 80%, #8b6914 100%);
  --grad-gold-button: linear-gradient(180deg, #ffd966 0%, #f0b428 50%, #c8941f 100%);
  --grad-red: linear-gradient(135deg, #ef4444 0%, #dc2626 50%, #991b1b 100%);
  --grad-bg: linear-gradient(180deg, #1a0d1f 0%, #2a1424 100%);
  --grad-section: linear-gradient(135deg, #2a1424 0%, #1a0d1f 50%, #2a1424 100%);

  --t-fast: 0.18s ease;
  --t-med: 0.32s ease;
  --font-body: 'Be Vietnam Pro', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-display: 'Playfair Display', Georgia, serif;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font-body);
  background: var(--grad-bg);
  background-attachment: fixed;
  color: var(--c-text);
  line-height: 1.65;
  font-size: 16px;
  overflow-x: hidden;
  position: relative;
}
/* Subtle gold particle backdrop */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  background-image:
    radial-gradient(circle at 15% 25%, rgba(240,180,40,0.06) 0%, transparent 35%),
    radial-gradient(circle at 85% 75%, rgba(220,38,38,0.05) 0%, transparent 40%),
    radial-gradient(circle at 50% 50%, rgba(240,180,40,0.03) 0%, transparent 50%);
  pointer-events: none;
  z-index: 0;
}
main { position: relative; z-index: 1; }
a { color: var(--c-gold-light); text-decoration: none; transition: color var(--t-fast); }
a:hover { color: var(--c-gold-bright); }
img { max-width: 100%; height: auto; display: block; }
.container { max-width: 1240px; margin: 0 auto; padding: 0 24px; }

/* ---------- Header ---------- */
.site-header {
  background: rgba(26, 13, 31, 0.88);
  backdrop-filter: blur(14px) saturate(140%);
  border-bottom: 1px solid transparent;
  border-image: linear-gradient(90deg, transparent 0%, rgba(240,180,40,0.4) 30%, rgba(220,38,38,0.3) 50%, rgba(240,180,40,0.4) 70%, transparent 100%) 1;
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: 0 1px 0 rgba(240,180,40,0.15), 0 4px 20px rgba(0,0,0,0.3);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 24px;
  gap: 32px;
}
.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
}
.brand-logo-img {
  height: 48px;
  width: auto;
  display: block;
  filter: drop-shadow(0 2px 6px rgba(0,0,0,0.4));
  transition: transform var(--t-fast);
}
.brand:hover .brand-logo-img {
  transform: scale(1.04);
}
.brand-accent { color: var(--c-gold); }
.nav-main {
  display: flex;
  align-items: center;
  gap: 28px;
  flex: 1;
  justify-content: center;
}
.nav-main a {
  color: var(--c-text);
  font-weight: 600;
  font-size: 15px;
  position: relative;
  padding: 8px 2px;
  letter-spacing: 0.2px;
  transition: color var(--t-fast);
}
.nav-main a:hover { color: var(--c-gold-light); text-shadow: 0 0 12px rgba(240,180,40,0.5); }
.nav-main a::after {
  content: '';
  position: absolute;
  left: 0; bottom: 0;
  width: 0; height: 2px;
  background: var(--grad-gold);
  border-radius: 2px;
  box-shadow: 0 0 8px rgba(240,180,40,0.6);
  transition: width var(--t-med);
}
.nav-main a:hover::after { width: 100%; }
.btn-cta {
  background: var(--grad-gold-button);
  color: #1a0d1f !important;
  padding: 12px 24px;
  border-radius: var(--r-md);
  font-weight: 800;
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: 0.8px;
  box-shadow: var(--shadow-gold), inset 0 1px 0 rgba(255,255,255,0.45), inset 0 -2px 0 rgba(139,105,20,0.4);
  transition: transform var(--t-fast), box-shadow var(--t-fast), filter var(--t-fast);
  border: 1px solid rgba(255,244,212,0.4);
  text-shadow: 0 1px 0 rgba(255,255,255,0.3);
}
.btn-cta:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-gold-strong), inset 0 1px 0 rgba(255,255,255,0.55);
  color: #1a0d1f !important;
  filter: brightness(1.08);
}
.nav-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  flex-direction: column;
  gap: 5px;
  padding: 6px;
}
.nav-toggle span {
  width: 26px;
  height: 2px;
  background: var(--c-text);
  border-radius: 2px;
  transition: all var(--t-fast);
}

/* ---------- Hero ---------- */
.hero {
  position: relative;
  min-height: 620px;
  display: flex;
  align-items: center;
  overflow: hidden;
}
.hero-bg {
  position: absolute;
  inset: 0;
  background-size: cover;
  background-position: center;
  filter: brightness(0.55) saturate(1.15);
  transform: scale(1.05);
}
.hero-overlay {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse at 70% 30%, rgba(240,180,40,0.25) 0%, transparent 55%),
    radial-gradient(ellipse at 20% 80%, rgba(220,38,38,0.2) 0%, transparent 50%),
    linear-gradient(135deg, rgba(26,13,31,0.88) 0%, rgba(26,13,31,0.45) 55%, rgba(59,24,24,0.55) 100%);
}
.hero-inner {
  position: relative;
  z-index: 2;
  padding: 80px 24px;
  max-width: 920px;
}
.hero-eyebrow {
  display: inline-block;
  background: linear-gradient(135deg, rgba(240,180,40,0.18) 0%, rgba(220,38,38,0.12) 100%);
  color: var(--c-gold-light);
  padding: 9px 20px;
  border-radius: 100px;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.8px;
  text-transform: uppercase;
  margin-bottom: 24px;
  border: 1px solid rgba(240,180,40,0.45);
  box-shadow: 0 0 24px rgba(240,180,40,0.18), inset 0 1px 0 rgba(255,244,212,0.15);
  text-shadow: 0 0 12px rgba(240,180,40,0.4);
}
.hero-title {
  font-family: var(--font-display);
  font-size: clamp(34px, 5.6vw, 68px);
  font-weight: 900;
  line-height: 1.06;
  margin-bottom: 24px;
  letter-spacing: -1.5px;
  color: var(--c-text-bright);
  text-shadow: 0 4px 24px rgba(0,0,0,0.6), 0 1px 0 rgba(255,255,255,0.1);
}
.hero-title .brand-accent {
  background: var(--grad-gold);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  filter: drop-shadow(0 2px 12px rgba(240,180,40,0.6));
}
.hero-sub {
  font-size: clamp(16px, 2vw, 19px);
  color: var(--c-text);
  opacity: 0.92;
  margin-bottom: 36px;
  max-width: 720px;
  text-shadow: 0 2px 12px rgba(0,0,0,0.5);
}
.hero-ctas {
  display: flex;
  gap: 16px;
  margin-bottom: 56px;
  flex-wrap: wrap;
}
.btn-primary {
  background: var(--grad-gold-button);
  color: #1a0d1f !important;
  padding: 17px 34px;
  border-radius: var(--r-md);
  font-weight: 800;
  font-size: 15px;
  letter-spacing: 0.5px;
  display: inline-block;
  border: 1px solid rgba(255,244,212,0.5);
  box-shadow: var(--shadow-gold), inset 0 1px 0 rgba(255,255,255,0.5), inset 0 -2px 0 rgba(139,105,20,0.35);
  transition: all var(--t-fast);
  position: relative;
  overflow: hidden;
  text-shadow: 0 1px 0 rgba(255,255,255,0.3);
}
.btn-primary::before {
  content: '';
  position: absolute;
  top: 0; left: -100%;
  width: 100%; height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.45), transparent);
  transition: left 0.6s ease;
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-gold-strong), inset 0 1px 0 rgba(255,255,255,0.55);
  color: #1a0d1f !important;
  filter: brightness(1.08);
}
.btn-primary:hover::before { left: 100%; }
.btn-secondary {
  background: rgba(255, 244, 224, 0.06);
  color: var(--c-gold-light) !important;
  padding: 17px 34px;
  border-radius: var(--r-md);
  font-weight: 700;
  font-size: 15px;
  letter-spacing: 0.5px;
  display: inline-block;
  border: 1.5px solid rgba(240, 180, 40, 0.4);
  backdrop-filter: blur(12px);
  transition: all var(--t-fast);
}
.btn-secondary:hover {
  background: rgba(240, 180, 40, 0.15);
  border-color: var(--c-gold);
  color: var(--c-gold-bright) !important;
  box-shadow: 0 0 24px rgba(240,180,40,0.3);
}
.btn-lg { padding: 18px 40px; font-size: 16px; }
.btn-block { display: block; text-align: center; }
.hero-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 22px;
  max-width: 760px;
}
.stat {
  background: linear-gradient(180deg, rgba(45, 26, 38, 0.7) 0%, rgba(26, 13, 31, 0.7) 100%);
  border: 1px solid rgba(240, 180, 40, 0.25);
  border-radius: var(--r-md);
  padding: 20px 14px;
  text-align: center;
  backdrop-filter: blur(10px);
  position: relative;
  overflow: hidden;
  transition: all var(--t-med);
}
.stat::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(240,180,40,0.6), transparent);
}
.stat:hover {
  border-color: rgba(240, 180, 40, 0.55);
  transform: translateY(-3px);
  box-shadow: 0 12px 28px rgba(0,0,0,0.4), 0 0 24px rgba(240,180,40,0.2);
}
.stat strong {
  display: block;
  font-size: clamp(20px, 2.6vw, 28px);
  background: var(--grad-gold);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  font-weight: 900;
  margin-bottom: 6px;
  letter-spacing: -0.5px;
  filter: drop-shadow(0 2px 6px rgba(240,180,40,0.3));
}
.stat span {
  font-size: 13px;
  color: var(--c-text);
  opacity: 0.85;
  font-weight: 500;
}

/* ---------- Sections common ---------- */
section { padding: 90px 0; }
.section-head {
  text-align: center;
  max-width: 720px;
  margin: 0 auto 56px;
}
.section-head h2 {
  font-family: var(--font-display);
  font-size: clamp(30px, 4.2vw, 46px);
  font-weight: 800;
  margin-bottom: 14px;
  letter-spacing: -1px;
  color: var(--c-text-bright);
  position: relative;
  display: inline-block;
}
.section-head h2::after {
  content: '';
  display: block;
  width: 80px;
  height: 4px;
  margin: 16px auto 0;
  background: var(--grad-gold);
  border-radius: 4px;
  box-shadow: 0 2px 12px rgba(240,180,40,0.5);
}
.section-head p {
  font-size: 17px;
  color: var(--c-text);
  opacity: 0.78;
  margin-top: 8px;
}

/* ---------- Categories ---------- */
.section-categories {
  background: var(--grad-section);
  position: relative;
}
.section-categories::before, .section-categories::after {
  content: '';
  position: absolute;
  left: 0; right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(240,180,40,0.3), transparent);
}
.section-categories::before { top: 0; }
.section-categories::after { bottom: 0; }
.cat-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 20px;
}
.cat-card {
  background: linear-gradient(180deg, var(--c-card) 0%, var(--c-bg-2) 100%);
  border: 1px solid var(--c-border-gold);
  border-radius: var(--r-md);
  padding: 36px 24px;
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 14px;
  color: var(--c-text);
  transition: all var(--t-med);
  position: relative;
  overflow: hidden;
}
.cat-card::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 50% 0%, rgba(240,180,40,0.18) 0%, transparent 60%);
  opacity: 0;
  transition: opacity var(--t-med);
}
.cat-card::after {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 2px;
  background: var(--grad-gold);
  transform: scaleX(0.3);
  transform-origin: center;
  transition: transform var(--t-med);
  opacity: 0.6;
}
.cat-card:hover {
  border-color: var(--c-gold);
  transform: translateY(-8px);
  box-shadow: var(--shadow-card), 0 0 32px rgba(240,180,40,0.25);
  color: var(--c-text-bright);
}
.cat-card:hover::before { opacity: 1; }
.cat-card:hover::after { transform: scaleX(1); opacity: 1; }
.cat-icon {
  width: 72px;
  height: 72px;
  border-radius: 18px;
  background: linear-gradient(135deg, rgba(240,180,40,0.25) 0%, rgba(220,38,38,0.1) 100%);
  display: grid;
  place-items: center;
  font-size: 24px;
  font-weight: 900;
  color: var(--c-gold-light);
  border: 1.5px solid rgba(240,180,40,0.5);
  position: relative;
  z-index: 2;
  box-shadow: inset 0 2px 0 rgba(255,244,212,0.2), 0 4px 16px rgba(0,0,0,0.3);
  text-shadow: 0 2px 8px rgba(240,180,40,0.5);
  transition: transform var(--t-med);
}
.cat-card:hover .cat-icon {
  transform: scale(1.08) rotate(-3deg);
  background: linear-gradient(135deg, rgba(240,180,40,0.4) 0%, rgba(220,38,38,0.2) 100%);
  border-color: var(--c-gold);
}
.cat-card h3 {
  font-size: 19px;
  font-weight: 800;
  position: relative;
  z-index: 2;
  color: var(--c-text-bright);
  letter-spacing: 0.2px;
}
.cat-arrow {
  font-size: 24px;
  color: var(--c-gold);
  opacity: 0;
  transform: translateX(-8px);
  transition: all var(--t-med);
  position: relative;
  z-index: 2;
  filter: drop-shadow(0 2px 6px rgba(240,180,40,0.5));
}
.cat-card:hover .cat-arrow {
  opacity: 1;
  transform: translateX(0);
}

/* ---------- Article cards ---------- */
.art-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(330px, 1fr));
  gap: 28px;
}
.art-card {
  background: linear-gradient(180deg, var(--c-card) 0%, var(--c-bg-2) 100%);
  border: 1px solid var(--c-border);
  border-radius: var(--r-md);
  overflow: hidden;
  transition: all var(--t-med);
  display: flex;
  flex-direction: column;
  position: relative;
}
.art-card::before {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: var(--r-md);
  padding: 1px;
  background: linear-gradient(135deg, transparent 30%, rgba(240,180,40,0.4) 50%, transparent 70%);
  -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  -webkit-mask-composite: xor;
  mask-composite: exclude;
  opacity: 0;
  transition: opacity var(--t-med);
  pointer-events: none;
}
.art-card:hover {
  border-color: var(--c-gold);
  transform: translateY(-6px);
  box-shadow: var(--shadow-card), 0 0 28px rgba(240,180,40,0.18);
}
.art-card:hover::before { opacity: 1; }
.art-thumb {
  position: relative;
  display: block;
  aspect-ratio: 16/10;
  overflow: hidden;
}
.art-thumb picture {
  display: block;
  width: 100%;
  height: 100%;
}
.art-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
  display: block;
}
.art-card:hover .art-thumb img { transform: scale(1.06); }
.art-cat {
  position: absolute;
  top: 14px;
  left: 14px;
  background: var(--grad-gold-button);
  color: #1a0d1f;
  padding: 7px 14px;
  border-radius: 100px;
  font-size: 11px;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.6px;
  box-shadow: 0 4px 12px rgba(0,0,0,0.4), inset 0 1px 0 rgba(255,255,255,0.4);
  border: 1px solid rgba(255,244,212,0.3);
  text-shadow: 0 1px 0 rgba(255,255,255,0.25);
}
.art-body {
  padding: 24px;
  flex: 1;
  display: flex;
  flex-direction: column;
}
.art-body h3 {
  font-size: 19px;
  font-weight: 800;
  line-height: 1.4;
  margin-bottom: 12px;
  letter-spacing: -0.2px;
}
.art-body h3 a { color: var(--c-text-bright); transition: color var(--t-fast); }
.art-body h3 a:hover { color: var(--c-gold-light); }
.art-body p {
  color: var(--c-text);
  opacity: 0.78;
  font-size: 14.5px;
  margin-bottom: 18px;
  flex: 1;
}
.art-link {
  font-weight: 700;
  font-size: 14px;
  color: var(--c-gold-light);
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: gap var(--t-fast);
}
.art-link:hover { gap: 12px; color: var(--c-gold-bright); }

/* ---------- Banner section ---------- */
.section-banner {
  background:
    radial-gradient(ellipse at 80% 50%, rgba(240,180,40,0.18) 0%, transparent 55%),
    radial-gradient(ellipse at 20% 50%, rgba(220,38,38,0.15) 0%, transparent 50%),
    linear-gradient(135deg, #3b1818 0%, #2a1424 50%, #1a0d1f 100%);
  border-top: 1px solid rgba(240,180,40,0.2);
  border-bottom: 1px solid rgba(240,180,40,0.2);
  position: relative;
  overflow: hidden;
}
.section-banner::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image: radial-gradient(circle at 1px 1px, rgba(240,180,40,0.08) 1px, transparent 0);
  background-size: 28px 28px;
  pointer-events: none;
  opacity: 0.6;
}
.banner-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 40px;
  flex-wrap: wrap;
}
.banner-text h2 {
  font-family: var(--font-display);
  font-size: clamp(24px, 3vw, 36px);
  font-weight: 800;
  margin-bottom: 10px;
}
.banner-text p {
  color: var(--c-text-mute);
  max-width: 640px;
  font-size: 16px;
}

/* ---------- Single article ---------- */
.single-hero {
  position: relative;
  min-height: 480px;
  display: flex;
  align-items: flex-end;
  overflow: hidden;
}
.single-hero-img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: brightness(0.45);
}
.single-hero-overlay {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse at 70% 20%, rgba(240,180,40,0.18) 0%, transparent 55%),
    linear-gradient(180deg, rgba(26,13,31,0.55) 0%, rgba(26,13,31,0.96) 100%);
}
.single-hero-text {
  position: relative;
  z-index: 2;
  padding: 80px 24px 60px;
}
.breadcrumb {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 13px;
  color: var(--c-text-mute);
  margin-bottom: 20px;
}
.breadcrumb a { color: var(--c-text-mute); }
.breadcrumb a:hover { color: var(--c-gold); }
.single-cat {
  display: inline-block;
  background: var(--grad-gold-button);
  color: #1a0d1f;
  padding: 7px 16px;
  border-radius: 100px;
  font-size: 12px;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.6px;
  margin-bottom: 18px;
  box-shadow: 0 4px 14px rgba(0,0,0,0.4), inset 0 1px 0 rgba(255,255,255,0.45);
  border: 1px solid rgba(255,244,212,0.3);
  text-shadow: 0 1px 0 rgba(255,255,255,0.25);
}
.single-hero-text h1 {
  font-family: var(--font-display);
  font-size: clamp(28px, 4.4vw, 48px);
  font-weight: 800;
  line-height: 1.15;
  margin-bottom: 24px;
  max-width: 920px;
  letter-spacing: -1px;
}
.single-meta {
  display: flex;
  gap: 24px;
  flex-wrap: wrap;
  color: var(--c-text-mute);
  font-size: 14px;
}

.single-body {
  display: grid;
  grid-template-columns: 1fr 320px;
  gap: 56px;
  padding: 64px 24px;
}
.single-content {
  font-size: 16.5px;
  line-height: 1.85;
}
.single-content .lead {
  font-size: 19px;
  font-weight: 500;
  color: var(--c-text);
  margin-bottom: 32px;
  line-height: 1.65;
  padding: 16px 20px;
  border-left: 4px solid var(--c-gold);
  background: linear-gradient(90deg, rgba(240,180,40,0.06) 0%, transparent 100%);
  border-radius: 0 8px 8px 0;
}
.single-content h2 {
  font-family: var(--font-display);
  font-size: 30px;
  font-weight: 800;
  margin: 48px 0 18px;
  color: var(--c-text-bright);
  letter-spacing: -0.5px;
  scroll-margin-top: 80px;
  position: relative;
  padding-left: 16px;
}
.single-content h2::before {
  content: '';
  position: absolute;
  left: 0; top: 12px; bottom: 12px;
  width: 4px;
  background: var(--grad-gold);
  border-radius: 4px;
  box-shadow: 0 0 12px rgba(240,180,40,0.4);
}
.single-content p {
  margin-bottom: 18px;
  color: var(--c-text);
  opacity: 0.92;
}
.inline-cta {
  background:
    radial-gradient(ellipse at 50% 0%, rgba(240,180,40,0.2) 0%, transparent 70%),
    linear-gradient(135deg, rgba(59,24,24,0.5) 0%, rgba(45,26,38,0.6) 100%);
  border: 1px solid rgba(240,180,40,0.4);
  border-radius: var(--r-md);
  padding: 32px 24px;
  margin: 40px 0;
  text-align: center;
  position: relative;
  overflow: hidden;
  box-shadow: 0 8px 28px rgba(0,0,0,0.3);
}
.inline-cta::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 2px;
  background: var(--grad-gold);
}
.inline-cta strong {
  display: block;
  font-size: 19px;
  color: var(--c-gold-light);
  margin-bottom: 8px;
  text-shadow: 0 0 12px rgba(240,180,40,0.4);
}
.inline-cta p {
  margin-bottom: 18px;
  color: var(--c-text);
  opacity: 0.9;
}
.post-cta {
  background:
    radial-gradient(ellipse at 50% 0%, rgba(220,38,38,0.2) 0%, transparent 60%),
    linear-gradient(135deg, var(--c-card) 0%, var(--c-bg-3) 50%, var(--c-bg-2) 100%);
  border: 2px solid var(--c-gold);
  border-radius: var(--r-md);
  padding: 44px 32px;
  text-align: center;
  margin-top: 56px;
  box-shadow: var(--shadow-gold-strong);
  position: relative;
  overflow: hidden;
}
.post-cta::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image: radial-gradient(circle at 1px 1px, rgba(240,180,40,0.06) 1px, transparent 0);
  background-size: 24px 24px;
  pointer-events: none;
}
.post-cta h3 {
  font-family: var(--font-display);
  font-size: 28px;
  font-weight: 800;
  margin-bottom: 12px;
  color: var(--c-gold-light);
  text-shadow: 0 2px 12px rgba(240,180,40,0.4);
  position: relative;
}
.post-cta p {
  color: var(--c-text);
  opacity: 0.88;
  margin-bottom: 24px;
  position: relative;
}

/* ---------- Sidebar ---------- */
.single-side {
  display: flex;
  flex-direction: column;
  gap: 24px;
  position: sticky;
  top: 80px;
  align-self: start;
}
.side-card {
  background: linear-gradient(180deg, var(--c-card) 0%, var(--c-bg-2) 100%);
  border: 1px solid var(--c-border-gold);
  border-radius: var(--r-md);
  padding: 24px;
  position: relative;
  overflow: hidden;
}
.side-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(240,180,40,0.5), transparent);
}
.side-card h4 {
  font-size: 14px;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.8px;
  margin-bottom: 18px;
  color: var(--c-gold-light);
  text-shadow: 0 0 10px rgba(240,180,40,0.3);
}
.side-card ol, .side-card ul {
  list-style: none;
  font-size: 14px;
}
.side-toc ol { counter-reset: toc; }
.side-toc li {
  counter-increment: toc;
  padding: 10px 0;
  border-bottom: 1px solid var(--c-border);
}
.side-toc li:last-child { border-bottom: none; }
.side-toc li a {
  color: var(--c-text);
  display: flex;
  gap: 12px;
}
.side-toc li a::before {
  content: counter(toc, decimal-leading-zero);
  color: var(--c-gold);
  font-weight: 800;
  font-size: 13px;
  text-shadow: 0 0 8px rgba(240,180,40,0.4);
}
.side-toc li a:hover { color: var(--c-gold-light); }
.side-promo .side-badge {
  position: absolute;
  top: -10px;
  right: 18px;
  background: var(--grad-red);
  color: white;
  padding: 6px 14px;
  border-radius: 100px;
  font-size: 11px;
  font-weight: 800;
  letter-spacing: 0.8px;
  box-shadow: var(--shadow-red);
  border: 1.5px solid rgba(255,255,255,0.2);
}
.side-promo ul li {
  padding: 10px 0;
  font-size: 14px;
  color: var(--c-text);
}
.related-list li { margin-bottom: 16px; }
.related-list li a {
  display: flex;
  gap: 12px;
  align-items: flex-start;
  color: var(--c-text);
  font-size: 13.5px;
  line-height: 1.4;
}
.related-list li picture {
  flex-shrink: 0;
  display: block;
}
.related-list li img {
  width: 64px;
  height: 64px;
  object-fit: cover;
  border-radius: 8px;
  flex-shrink: 0;
  display: block;
}
.related-list li a:hover { color: var(--c-gold); }

/* ---------- Category page hero ---------- */
.cat-hero {
  background:
    radial-gradient(ellipse at 80% 50%, rgba(240,180,40,0.15) 0%, transparent 55%),
    radial-gradient(ellipse at 20% 50%, rgba(220,38,38,0.12) 0%, transparent 50%),
    linear-gradient(135deg, var(--c-bg-2) 0%, var(--c-bg-3) 100%);
  padding: 80px 0 60px;
  border-bottom: 1px solid rgba(240,180,40,0.25);
  position: relative;
}
.cat-hero h1 {
  font-family: var(--font-display);
  font-size: clamp(34px, 4.4vw, 52px);
  font-weight: 800;
  margin: 16px 0 14px;
  letter-spacing: -1px;
  background: var(--grad-gold);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  filter: drop-shadow(0 2px 12px rgba(240,180,40,0.3));
}
.cat-hero p {
  font-size: 17px;
  color: var(--c-text);
  opacity: 0.85;
  max-width: 720px;
}

/* ---------- Empty category ---------- */
.cat-empty {
  text-align: center;
  padding: 80px 20px;
  color: var(--c-text-mute);
}
.cat-empty p {
  font-size: 17px;
  margin-bottom: 28px;
}
.cat-empty-links {
  display: flex;
  justify-content: center;
  gap: 12px;
  flex-wrap: wrap;
}
.cat-empty-links .btn-secondary {
  padding: 10px 20px;
  font-size: 14px;
}

/* ---------- Smooth scroll target offset for sticky header ---------- */
:target { scroll-margin-top: 80px; }

/* ---------- Focus visibility (a11y) ---------- */
a:focus-visible, button:focus-visible {
  outline: 2px solid var(--c-gold);
  outline-offset: 3px;
  border-radius: 4px;
}

/* ---------- Floating Contact Button ---------- */
.fab-contact {
  position: fixed;
  bottom: 28px;
  right: 28px;
  z-index: 999;
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 14px;
  pointer-events: none;
}
.fab-contact * { pointer-events: auto; }

.fab-options {
  display: flex;
  flex-direction: column;
  gap: 12px;
  opacity: 0;
  transform: translateY(20px) scale(0.85);
  transform-origin: bottom right;
  transition: opacity 0.3s ease, transform 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
  pointer-events: none;
}
.fab-contact.open .fab-options {
  opacity: 1;
  transform: translateY(0) scale(1);
  pointer-events: auto;
}
.fab-option {
  display: flex;
  align-items: center;
  gap: 12px;
  background: var(--c-card);
  border: 1px solid var(--c-border);
  padding: 12px 18px 12px 14px;
  border-radius: 100px;
  color: var(--c-text);
  font-weight: 600;
  font-size: 14px;
  white-space: nowrap;
  box-shadow: 0 6px 20px rgba(0,0,0,0.4);
  transition: all var(--t-fast);
  text-decoration: none;
}
.fab-option:hover {
  background: var(--c-card-hover);
  border-color: var(--c-gold);
  transform: translateX(-4px);
  color: var(--c-gold);
}
.fab-option-icon {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  flex-shrink: 0;
  font-size: 18px;
  color: white;
}
.fab-option-icon.telegram { background: linear-gradient(135deg, #2aabee, #229ed9); }
.fab-option-icon.zalo { background: linear-gradient(135deg, #0068ff, #0052cc); }
.fab-option-icon.livechat { background: linear-gradient(135deg, #25d366, #128c7e); }
.fab-option-icon.phone { background: linear-gradient(135deg, #ff6b6b, #ee5a52); }

.fab-main {
  display: flex;
  align-items: center;
  gap: 10px;
  background: var(--grad-gold-button);
  color: #1a0d1f;
  padding: 14px 22px 14px 18px;
  border-radius: 100px;
  font-weight: 800;
  font-size: 14px;
  text-transform: uppercase;
  letter-spacing: 0.6px;
  border: 1.5px solid rgba(255,244,212,0.5);
  cursor: pointer;
  box-shadow: 0 8px 24px rgba(240,180,40,0.5), inset 0 1px 0 rgba(255,255,255,0.5), 0 0 0 0 rgba(240,180,40,0.6);
  transition: all 0.3s ease;
  animation: fab-pulse 2.4s ease-out infinite;
  text-shadow: 0 1px 0 rgba(255,255,255,0.3);
}
.fab-main:hover {
  transform: translateY(-3px) scale(1.04);
  box-shadow: 0 14px 32px rgba(212,175,55,0.6);
  animation-play-state: paused;
}
.fab-contact.open .fab-main {
  animation: none;
  transform: rotate(45deg);
  border-radius: 50%;
  padding: 14px;
  font-size: 0;
  width: 54px;
  height: 54px;
  justify-content: center;
}
.fab-contact.open .fab-main .fab-icon-headset { display: none; }
.fab-contact.open .fab-main .fab-icon-close { display: block; font-size: 28px; line-height: 1; }
.fab-icon-close { display: none; }
.fab-icon-headset {
  display: inline-grid;
  place-items: center;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: rgba(10,14,26,0.18);
  font-size: 16px;
}
.fab-badge {
  position: absolute;
  top: -6px;
  right: -4px;
  background: #ff3b3b;
  color: white;
  border-radius: 50%;
  width: 22px;
  height: 22px;
  display: grid;
  place-items: center;
  font-size: 11px;
  font-weight: 700;
  border: 2px solid var(--c-bg);
  animation: fab-badge-bounce 1.6s ease-in-out infinite;
}
.fab-contact.open .fab-badge { display: none; }

@keyframes fab-pulse {
  0% { box-shadow: 0 8px 24px rgba(240,180,40,0.5), inset 0 1px 0 rgba(255,255,255,0.5), 0 0 0 0 rgba(240,180,40,0.7); }
  70% { box-shadow: 0 8px 24px rgba(240,180,40,0.5), inset 0 1px 0 rgba(255,255,255,0.5), 0 0 0 22px rgba(240,180,40,0); }
  100% { box-shadow: 0 8px 24px rgba(240,180,40,0.5), inset 0 1px 0 rgba(255,255,255,0.5), 0 0 0 0 rgba(240,180,40,0); }
}
@keyframes fab-badge-bounce {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-3px); }
}

/* Hide on scroll-down, show on scroll-up */
.fab-contact.hidden {
  transform: translateY(120px);
  opacity: 0;
  transition: all 0.35s ease;
}

@media (max-width: 560px) {
  .fab-contact { bottom: 18px; right: 18px; }
  .fab-main {
    padding: 12px 18px 12px 14px;
    font-size: 13px;
  }
  .fab-option { padding: 10px 14px 10px 12px; font-size: 13px; }
}

/* ---------- Footer ---------- */
.site-footer {
  background: linear-gradient(180deg, #0f0710 0%, #1a0d1f 100%);
  border-top: 2px solid transparent;
  border-image: linear-gradient(90deg, transparent 0%, var(--c-gold) 30%, var(--c-red) 50%, var(--c-gold) 70%, transparent 100%) 1;
  padding-top: 64px;
  position: relative;
}
.site-footer::before {
  content: '';
  position: absolute;
  top: -1px; left: 0; right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(240,180,40,0.5), transparent);
  filter: blur(1px);
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr;
  gap: 48px;
  padding-bottom: 56px;
}
.footer-brand {
  font-size: 26px;
  font-weight: 800;
  margin-bottom: 14px;
  letter-spacing: -0.5px;
}
.footer-logo-img {
  height: 56px;
  width: auto;
  display: block;
  margin-bottom: 16px;
  filter: drop-shadow(0 2px 6px rgba(0,0,0,0.5));
}
.footer-col p {
  color: var(--c-text-mute);
  font-size: 14.5px;
  margin-bottom: 12px;
}
.footer-meta {
  font-size: 13px !important;
  color: #6b7185 !important;
  font-style: italic;
}
.footer-col h4 {
  font-size: 14px;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.8px;
  color: var(--c-gold-light);
  margin-bottom: 18px;
  text-shadow: 0 0 12px rgba(240,180,40,0.3);
}
.footer-col ul { list-style: none; }
.footer-col li {
  padding: 7px 0;
  font-size: 14px;
  color: var(--c-text-mute);
}
.footer-col li a { color: var(--c-text-mute); }
.footer-col li a:hover { color: var(--c-gold); }
.footer-bottom {
  border-top: 1px solid var(--c-border);
  padding: 22px 0;
  text-align: center;
}
.footer-bottom p {
  font-size: 13px;
  color: #6b7185;
}

/* ---------- Responsive ---------- */
@media (max-width: 960px) {
  .nav-toggle { display: flex; }
  .nav-main {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--c-bg);
    flex-direction: column;
    align-items: stretch;
    padding: 24px;
    gap: 0;
    border-bottom: 1px solid var(--c-border);
    transform: translateY(-12px);
    opacity: 0;
    pointer-events: none;
    transition: all var(--t-med);
  }
  .nav-main.open {
    transform: translateY(0);
    opacity: 1;
    pointer-events: auto;
  }
  .nav-main a {
    padding: 14px 0;
    border-bottom: 1px solid var(--c-border);
  }
  .btn-cta { padding: 9px 16px; font-size: 13px; }
  .single-body { grid-template-columns: 1fr; gap: 40px; }
  .single-side { position: static; }
  .footer-grid { grid-template-columns: repeat(2, 1fr); gap: 32px; }
  section { padding: 60px 0; }
  .hero { min-height: 540px; }
  .hero-stats { grid-template-columns: repeat(2, 1fr); }
  .banner-inner { flex-direction: column; align-items: flex-start; }
}
@media (max-width: 560px) {
  .footer-grid { grid-template-columns: 1fr; }
  .hero-inner { padding: 60px 20px; }
  .hero-stats { grid-template-columns: repeat(2, 1fr); gap: 12px; }
  .stat { padding: 14px 10px; }
  .single-hero-text { padding: 60px 20px 40px; }
  .single-content h2 { font-size: 22px; margin: 32px 0 14px; }
  .single-content .lead { font-size: 17px; }
  .post-cta { padding: 28px 20px; }
}