/* ============================================================
   Vietnam Airlines concept — scoped under [data-site="vietnam-airlines"]
   Fingerprint: utility topbar · horizon arc serif banner ·
   editorial timeline rail · wide airy golden divider · lotus arc
   ============================================================ */

[data-site="vietnam-airlines"] {
  --vna-navy: #0b2e5b;
  --vna-navy-deep: #061c39;
  --vna-navy-ink: #0a1b30;
  --vna-gold: #c29a4b;
  --vna-gold-soft: #f1e7ce;
  --vna-gold-deep: #6e5423;
  --vna-sky: #dce6f2;
  --vna-canvas: #f5f7fa;
  --vna-surface: #ffffff;
  --vna-muted: #5a6b80;
  --vna-border: #d5deea;
  --vna-serif: Georgia, "Times New Roman", "Noto Serif", serif;
  --vna-sans: system-ui, "Segoe UI", "Helvetica Neue", Arial, sans-serif;
  --vna-container: 76rem;
  --vna-radius: 0.75rem;
  --vna-t-fast: 150ms;
  --vna-t-base: 260ms;

  font-family: var(--vna-sans);
  background: var(--vna-canvas);
  color: var(--vna-navy-ink);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  margin: 0;
}

[data-site="vietnam-airlines"] *,
[data-site="vietnam-airlines"] *::before,
[data-site="vietnam-airlines"] *::after { box-sizing: border-box; }

[data-site="vietnam-airlines"] h1,
[data-site="vietnam-airlines"] h2,
[data-site="vietnam-airlines"] h3 {
  font-family: var(--vna-serif);
  font-weight: 600;
  line-height: 1.15;
  letter-spacing: -0.01em;
  margin: 0 0 0.6em;
}

[data-site="vietnam-airlines"] p { margin: 0 0 1em; }
[data-site="vietnam-airlines"] ul, [data-site="vietnam-airlines"] ol { margin: 0; padding: 0; list-style: none; }
[data-site="vietnam-airlines"] a { color: var(--vna-navy); }
[data-site="vietnam-airlines"] svg { max-width: 100%; }

[data-site="vietnam-airlines"] :focus-visible {
  outline: 3px solid var(--vna-gold);
  outline-offset: 3px;
  border-radius: 4px;
}

[data-site="vietnam-airlines"] .visually-hidden {
  position: absolute !important;
  width: 1px; height: 1px;
  margin: -1px; padding: 0;
  overflow: hidden; clip: rect(0 0 0 0);
  white-space: nowrap; border: 0;
}

[data-site="vietnam-airlines"] .skip {
  position: absolute;
  left: 1rem; top: -4rem;
  background: var(--vna-gold);
  color: var(--vna-navy-deep);
  font-weight: 700;
  padding: 0.7rem 1.2rem;
  z-index: 100;
  transition: top var(--vna-t-fast) ease;
  text-decoration: none;
}
[data-site="vietnam-airlines"] .skip:focus { top: 1rem; }

[data-site="vietnam-airlines"] .container {
  width: min(100% - 2.5rem, var(--vna-container));
  margin-inline: auto;
}

/* ---------- concept strip ---------- */
[data-site="vietnam-airlines"] .concept-strip {
  background: var(--vna-gold-deep);
  color: #f4ecd8;
  font-size: 0.8rem;
  padding: 0.55rem 1rem;
  text-align: center;
}
[data-site="vietnam-airlines"] .concept-tag {
  display: inline-block;
  background: var(--vna-gold);
  color: var(--vna-navy-deep);
  font-weight: 800;
  font-size: 0.66rem;
  letter-spacing: 0.12em;
  padding: 0.12rem 0.6rem;
  margin-right: 0.5rem;
  vertical-align: 1px;
}

/* ---------- header ---------- */
[data-site="vietnam-airlines"] .utility-bar {
  background: var(--vna-navy-deep);
  color: var(--vna-sky);
  font-size: 0.78rem;
}
[data-site="vietnam-airlines"] .utility-inner {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.4rem 0;
  flex-wrap: wrap;
}
[data-site="vietnam-airlines"] .utility-links a { color: var(--vna-gold-soft); }

[data-site="vietnam-airlines"] .site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(255, 255, 255, 0.96);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--vna-border);
}
[data-site="vietnam-airlines"] .header-inner {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  padding: 0.8rem 0;
}
[data-site="vietnam-airlines"] .brand {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  text-decoration: none;
  color: var(--vna-navy);
}
[data-site="vietnam-airlines"] .brand-text { display: flex; flex-direction: column; line-height: 1.15; }
[data-site="vietnam-airlines"] .brand-name {
  font-family: var(--vna-serif);
  font-size: 1.28rem;
  font-weight: 700;
  letter-spacing: 0.01em;
  color: var(--vna-navy);
}
[data-site="vietnam-airlines"] .brand-sub {
  font-size: 0.62rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--vna-gold-deep);
}
[data-site="vietnam-airlines"] .main-nav { margin-left: auto; }
[data-site="vietnam-airlines"] .main-nav ul { display: flex; gap: 0.2rem; flex-wrap: wrap; }
[data-site="vietnam-airlines"] .main-nav a {
  display: block;
  text-decoration: none;
  color: var(--vna-navy-ink);
  font-weight: 600;
  font-size: 0.92rem;
  padding: 0.5rem 0.85rem;
  border-bottom: 2px solid transparent;
  transition: border-color var(--vna-t-fast) ease, color var(--vna-t-fast) ease;
}
[data-site="vietnam-airlines"] .main-nav a:hover {
  border-bottom-color: var(--vna-gold);
  color: var(--vna-navy);
}
[data-site="vietnam-airlines"] .header-cta {
  text-decoration: none;
  font-weight: 700;
  font-size: 0.86rem;
  color: var(--vna-navy-deep);
  background: var(--vna-gold-soft);
  border: 1px solid var(--vna-gold);
  padding: 0.55rem 1.05rem;
  white-space: nowrap;
  transition: background var(--vna-t-fast) ease;
}
[data-site="vietnam-airlines"] .header-cta:hover { background: var(--vna-gold); }

[data-site="vietnam-airlines"] .nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: 0;
  padding: 0.5rem;
  cursor: pointer;
  margin-left: auto;
}
[data-site="vietnam-airlines"] .nav-toggle span {
  width: 24px; height: 3px;
  background: var(--vna-navy);
}

/* ---------- hero ---------- */
[data-site="vietnam-airlines"] .hero {
  position: relative;
  color: #fff;
  overflow: hidden;
  padding: 7rem 0 9rem;
}
[data-site="vietnam-airlines"] .hero-art {
  position: absolute;
  inset: 0;
  z-index: -1;
}
[data-site="vietnam-airlines"] .hero-art svg {
  width: 100%;
  height: 100%;
  display: block;
  object-fit: cover;
}
[data-site="vietnam-airlines"] .hero-inner { max-width: var(--vna-container); }
[data-site="vietnam-airlines"] .eyebrow {
  color: var(--vna-gold);
  font-weight: 700;
  font-size: 0.82rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  margin: 0 0 1rem;
}
[data-site="vietnam-airlines"] .eyebrow.gold { color: var(--vna-gold-deep); }
[data-site="vietnam-airlines"] .section-navy .eyebrow.gold,
[data-site="vietnam-airlines"] .lotus .eyebrow.gold { color: var(--vna-gold); }
[data-site="vietnam-airlines"] .hero h1 {
  font-size: clamp(3rem, 7vw, 5.2rem);
  margin-bottom: 0.25em;
  color: #fff;
}
[data-site="vietnam-airlines"] .hero h1 em {
  font-style: italic;
  color: var(--vna-gold);
}
[data-site="vietnam-airlines"] .hero-sub {
  font-family: var(--vna-serif);
  font-style: italic;
  font-size: 1.15rem;
  color: var(--vna-gold-soft);
  margin-bottom: 1.2rem;
}
[data-site="vietnam-airlines"] .lede {
  max-width: 44rem;
  color: var(--vna-sky);
  font-size: 1.04rem;
}
[data-site="vietnam-airlines"] .hero-badges {
  display: flex;
  gap: 0.7rem;
  flex-wrap: wrap;
  margin-top: 1.8rem;
}
[data-site="vietnam-airlines"] .badge {
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  padding: 0.45rem 1rem;
  border: 1px solid rgba(220, 230, 242, 0.4);
  color: var(--vna-sky);
  background: rgba(6, 28, 57, 0.35);
  backdrop-filter: blur(4px);
}
[data-site="vietnam-airlines"] .badge-gold {
  border-color: var(--vna-gold);
  color: var(--vna-gold-soft);
}

/* ---------- sections ---------- */
[data-site="vietnam-airlines"] .section { padding: 4.5rem 0; }
[data-site="vietnam-airlines"] .section-navy {
  background: var(--vna-navy);
  color: #e8eef7;
}
[data-site="vietnam-airlines"] .section-navy h2, [data-site="vietnam-airlines"] .section-navy h3 { color: #fff; }
[data-site="vietnam-airlines"] .section-tint { background: #eaf0f7; }
[data-site="vietnam-airlines"] .section-head { max-width: 46rem; margin-bottom: 2.5rem; }
[data-site="vietnam-airlines"] .section-head h2 { font-size: clamp(1.9rem, 3.6vw, 2.7rem); }
[data-site="vietnam-airlines"] .section-note { color: var(--vna-muted); }
[data-site="vietnam-airlines"] .on-dark .section-note { color: #b7c6da; }
[data-site="vietnam-airlines"] .footnote { font-size: 0.82rem; color: var(--vna-muted); }

/* timeline */
[data-site="vietnam-airlines"] .timeline {
  position: relative;
  display: grid;
  gap: 0;
}
[data-site="vietnam-airlines"] .timeline::before {
  content: "";
  position: absolute;
  left: 3.4rem;
  top: 0.4rem;
  bottom: 0.4rem;
  width: 2px;
  background: linear-gradient(var(--vna-gold), var(--vna-sky));
}
[data-site="vietnam-airlines"] .t-item {
  display: grid;
  grid-template-columns: 6.8rem 1fr;
  gap: 1.5rem;
  padding: 1.1rem 0;
  border-bottom: 1px solid var(--vna-border);
  position: relative;
}
[data-site="vietnam-airlines"] .t-item:last-child { border-bottom: 0; }
[data-site="vietnam-airlines"] .t-item::after {
  content: "";
  position: absolute;
  left: 3.32rem;
  top: 1.7rem;
  width: 0.85rem; height: 0.85rem;
  border-radius: 50%;
  background: var(--vna-surface);
  border: 3px solid var(--vna-gold);
}
[data-site="vietnam-airlines"] .t-year {
  font-family: var(--vna-serif);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--vna-navy);
  text-align: right;
  line-height: 1.2;
}
[data-site="vietnam-airlines"] .t-item-now .t-year { color: var(--vna-gold-deep); }
[data-site="vietnam-airlines"] .t-body h3 { font-size: 1.05rem; margin-bottom: 0.25em; }
[data-site="vietnam-airlines"] .t-body p { margin: 0; color: var(--vna-muted); font-size: 0.95rem; }

/* fleet */
[data-site="vietnam-airlines"] .fleet-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.25rem;
}
[data-site="vietnam-airlines"] .fleet-card {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(220, 230, 242, 0.18);
  padding: 1.5rem 1.35rem;
  transition: border-color var(--vna-t-fast) ease, transform var(--vna-t-base) ease;
}
[data-site="vietnam-airlines"] .fleet-card:hover { border-color: var(--vna-gold); transform: translateY(-3px); }
[data-site="vietnam-airlines"] .fleet-art { margin-bottom: 1rem; }
[data-site="vietnam-airlines"] .fleet-art svg { width: 100%; height: auto; }
[data-site="vietnam-airlines"] .fleet-card p { color: #b7c6da; font-size: 0.92rem; }

/* network */
[data-site="vietnam-airlines"] .network-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background: var(--vna-border);
  border: 1px solid var(--vna-border);
}
[data-site="vietnam-airlines"] .network-stats li {
  background: var(--vna-surface);
  padding: 2rem 1.5rem;
  text-align: center;
  display: grid;
  gap: 0.3rem;
}
[data-site="vietnam-airlines"] .n-value {
  font-family: var(--vna-serif);
  font-size: 2.8rem;
  font-weight: 700;
  color: var(--vna-navy);
  line-height: 1;
}
[data-site="vietnam-airlines"] .n-label {
  font-size: 0.85rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--vna-muted);
}
[data-site="vietnam-airlines"] .route-note { margin-top: 1.25rem; font-size: 0.92rem; color: var(--vna-muted); }

/* cabins */
[data-site="vietnam-airlines"] .cabin-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.25rem;
}
[data-site="vietnam-airlines"] .cabin-card {
  background: var(--vna-surface);
  border: 1px solid var(--vna-border);
  border-top: 3px solid var(--vna-navy);
  padding: 1.8rem 1.5rem;
}
[data-site="vietnam-airlines"] .cabin-card:nth-child(2) { border-top-color: var(--vna-gold); }
[data-site="vietnam-airlines"] .cabin-no {
  font-family: var(--vna-serif);
  font-size: 0.95rem;
  color: var(--vna-gold-deep);
  letter-spacing: 0.1em;
}
[data-site="vietnam-airlines"] .cabin-card h3 { font-size: 1.3rem; }
[data-site="vietnam-airlines"] .cabin-card p { color: var(--vna-muted); margin: 0; }

/* lotus */
[data-site="vietnam-airlines"] .lotus {
  background:
    radial-gradient(46rem 26rem at 90% 10%, rgba(194, 154, 75, 0.16) 0%, transparent 60%),
    var(--vna-navy-deep);
  color: #e8eef7;
}
[data-site="vietnam-airlines"] .lotus h2 { color: #fff; }
[data-site="vietnam-airlines"] .lotus-grid {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 3rem;
  align-items: center;
}
[data-site="vietnam-airlines"] .lotus-list { display: grid; gap: 0.55rem; margin: 1.25rem 0; }
[data-site="vietnam-airlines"] .lotus-list li { display: flex; gap: 0.6rem; align-items: baseline; }
[data-site="vietnam-airlines"] .lotus-list li::before {
  content: "❖";
  color: var(--vna-gold);
  flex: none;
}
[data-site="vietnam-airlines"] .lotus .footnote { color: #9fb1c8; }
[data-site="vietnam-airlines"] .lotus-art svg {
  display: block;
  width: 100%;
  height: auto;
  border-radius: 1.25rem;
}

/* vision */
[data-site="vietnam-airlines"] .vision { background: var(--vna-canvas); }
[data-site="vietnam-airlines"] .vision-quote { margin: 0 0 2.5rem; text-align: center; }
[data-site="vietnam-airlines"] .vision-quote blockquote { margin: 0; }
[data-site="vietnam-airlines"] .vision-quote p {
  font-family: var(--vna-serif);
  font-size: clamp(1.4rem, 3vw, 2.1rem);
  font-style: italic;
  line-height: 1.4;
  color: var(--vna-navy);
  max-width: 52rem;
  margin-inline: auto;
}
[data-site="vietnam-airlines"] .vision-quote figcaption {
  margin-top: 1rem;
  font-size: 0.82rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--vna-gold-deep);
}
[data-site="vietnam-airlines"] .vision-cols {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.25rem;
}
[data-site="vietnam-airlines"] .vision-card {
  background: var(--vna-surface);
  border: 1px solid var(--vna-border);
  padding: 1.6rem 1.5rem;
}
[data-site="vietnam-airlines"] .vision-card h3 { font-size: 1.15rem; }
[data-site="vietnam-airlines"] .vision-card p { margin: 0; color: var(--vna-muted); }
[data-site="vietnam-airlines"] .vision-card-gold {
  background: var(--vna-gold-soft);
  border-color: var(--vna-gold);
}
[data-site="vietnam-airlines"] .vision-card-gold p { color: #4d3f22; }

/* cta */
[data-site="vietnam-airlines"] .cta { padding: 4.5rem 0; }
[data-site="vietnam-airlines"] .cta-inner { text-align: center; }
[data-site="vietnam-airlines"] .cta-inner h2 { font-size: clamp(1.8rem, 3.4vw, 2.5rem); }
[data-site="vietnam-airlines"] .cta-inner p { color: var(--vna-muted); max-width: 36rem; margin-inline: auto; }
[data-site="vietnam-airlines"] .btn {
  display: inline-block;
  text-decoration: none;
  font-weight: 700;
  padding: 0.85rem 1.7rem;
  margin-top: 0.5rem;
  transition: background var(--vna-t-fast) ease, transform var(--vna-t-fast) ease;
}
[data-site="vietnam-airlines"] .btn-gold {
  background: var(--vna-gold);
  color: var(--vna-navy-deep);
}
[data-site="vietnam-airlines"] .btn-gold:hover { background: #d4af5f; transform: translateY(-1px); }

/* footer */
[data-site="vietnam-airlines"] .site-footer {
  background: var(--vna-navy-deep);
  color: #b7c6da;
  padding: 3.5rem 0 2rem;
}
[data-site="vietnam-airlines"] .footer-brand { margin-bottom: 1.5rem; display: grid; gap: 0.2rem; }
[data-site="vietnam-airlines"] .f-name {
  font-family: var(--vna-serif);
  color: #fff;
  font-size: 1.5rem;
  font-weight: 700;
}
[data-site="vietnam-airlines"] .f-sub { font-size: 0.85rem; color: var(--vna-gold); }
[data-site="vietnam-airlines"] .footer-nav ul { display: flex; flex-wrap: wrap; gap: 0.5rem 1.5rem; margin-bottom: 1.75rem; }
[data-site="vietnam-airlines"] .footer-nav a { color: #e8eef7; text-decoration: none; font-size: 0.92rem; }
[data-site="vietnam-airlines"] .footer-nav a:hover { color: var(--vna-gold); }
[data-site="vietnam-airlines"] .legal {
  display: grid;
  gap: 0.6rem;
  margin: 0 0 1.75rem;
  max-width: 40rem;
}
[data-site="vietnam-airlines"] .legal div { display: grid; grid-template-columns: 11rem 1fr; gap: 0.75rem; }
[data-site="vietnam-airlines"] .legal dt {
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--vna-gold);
}
[data-site="vietnam-airlines"] .legal dd { margin: 0; font-size: 0.92rem; }
[data-site="vietnam-airlines"] .disclaimer {
  border-top: 1px solid rgba(220, 230, 242, 0.16);
  padding-top: 1.5rem;
  font-size: 0.82rem;
  color: #9fb1c8;
  max-width: 60rem;
}
[data-site="vietnam-airlines"] .colophon { font-size: 0.75rem; color: #93a6bf; }

/* ---------- responsive ---------- */
@media (max-width: 1020px) {
  [data-site="vietnam-airlines"] .fleet-grid,
  [data-site="vietnam-airlines"] .network-stats { grid-template-columns: repeat(2, 1fr); }
  [data-site="vietnam-airlines"] .cabin-grid,
  [data-site="vietnam-airlines"] .vision-cols { grid-template-columns: 1fr; }
  [data-site="vietnam-airlines"] .lotus-grid { grid-template-columns: 1fr; }
  [data-site="vietnam-airlines"] .hero { padding: 5rem 0 6rem; }
}

@media (max-width: 760px) {
  [data-site="vietnam-airlines"] .nav-toggle { display: flex; }
  [data-site="vietnam-airlines"] .main-nav {
    display: none;
    position: absolute;
    top: 100%;
    left: 0; right: 0;
    background: var(--vna-surface);
    border-bottom: 1px solid var(--vna-border);
    padding: 0.75rem 1.25rem 1.25rem;
  }
  [data-site="vietnam-airlines"] .main-nav.is-open { display: block; }
  [data-site="vietnam-airlines"] .main-nav ul { flex-direction: column; gap: 0.25rem; }
  [data-site="vietnam-airlines"] .main-nav a { border-bottom-color: transparent; }
  [data-site="vietnam-airlines"] .header-cta { display: none; }
  [data-site="vietnam-airlines"] .timeline::before { left: 0.4rem; }
  [data-site="vietnam-airlines"] .t-item { grid-template-columns: 1fr; gap: 0.35rem; padding-left: 1.6rem; }
  [data-site="vietnam-airlines"] .t-item::after { left: 0.02rem; top: 1.45rem; }
  [data-site="vietnam-airlines"] .t-year { text-align: left; }
}

@media (max-width: 520px) {
  [data-site="vietnam-airlines"] .fleet-grid,
  [data-site="vietnam-airlines"] .network-stats { grid-template-columns: 1fr; }
  [data-site="vietnam-airlines"] .section { padding: 3rem 0; }
  [data-site="vietnam-airlines"] .legal div { grid-template-columns: 1fr; }
}

/* ---------- motion ---------- */
@media (prefers-reduced-motion: reduce) {
  [data-site="vietnam-airlines"] * {
    animation: none !important;
    transition: none !important;
  }
}