/* Self-hosted sunlit editorial serif: Newsreader (OFL 1.1), latin + vietnamese subsets.
   Family name is site-prefixed ("Vietravel Journal") so @font-face cannot leak. */
@font-face{font-family:"Vietravel Journal";font-style:normal;font-weight:400 700;font-display:swap;src:url("./font-newsreader-latin.woff2") format("woff2");unicode-range:U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD}
@font-face{font-family:"Vietravel Journal";font-style:normal;font-weight:400 700;font-display:swap;src:url("./font-newsreader-vietnamese.woff2") format("woff2");unicode-range:U+0102-0103, U+0110-0111, U+0128-0129, U+0168-0169, U+01A0-01A1, U+01AF-01B0, U+0300-0301, U+0303-0304, U+0308-0309, U+0323, U+0329, U+1EA0-1EF9, U+20AB}
/* ============================================================
   Vietravel concept — scoped under [data-site="vietravel"]
   Fingerprint: boarding pass tab nav · aircraft window
   viewport · sunlit editorial journey · itinerary leg list ·
   postcard stamp alternation · window view horizon · stamp
   perforation luggage tag · wander gentle
   ============================================================ */

[data-site="vietravel"] {
  --vt-canvas: #fdf9f0;
  --vt-surface: #ffffff;
  --vt-text: #2c2a22;
  --vt-muted: #6b6555;
  --vt-sea: #0a4666;
  --vt-sea-mid: #0e5e8a;
  --vt-sun: #d98e1b;
  --vt-sun-deep: #8a5a0f;
  --vt-coral: #c25430;
  --vt-border: #e9e0cc;
  --vt-serif: "Vietravel Journal", Georgia, "Times New Roman", "Noto Serif", serif;
  --vt-container: 74rem;
  --vt-t-fast: 140ms;
  --vt-t-base: 240ms;

  font-family: system-ui, "Segoe UI", "Helvetica Neue", Arial, sans-serif;
  background: var(--vt-canvas);
  color: var(--vt-text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  margin: 0;
}

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

[data-site="vietravel"] h1,
[data-site="vietravel"] h2,
[data-site="vietravel"] h3 {
  font-family: var(--vt-serif);
  font-weight: 600;
  line-height: 1.15;
  margin: 0 0 0.6em;
}

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

[data-site="vietravel"] :focus-visible {
  outline: 3px solid var(--vt-sea-mid);
  outline-offset: 3px;
  border-radius: 6px;
}

[data-site="vietravel"] .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="vietravel"] .skip {
  position: absolute;
  left: 1rem; top: -4rem;
  background: var(--vt-sea);
  color: #fff;
  font-weight: 700;
  padding: 0.7rem 1.2rem;
  z-index: 100;
  text-decoration: none;
  transition: top var(--vt-t-fast) ease;
}
[data-site="vietravel"] .skip:focus { top: 1rem; }

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

/* ---------- concept strip ---------- */
[data-site="vietravel"] .concept-strip {
  background: var(--vt-sea);
  color: #cfe2ee;
  font-size: 0.8rem;
  padding: 0.55rem 1rem;
  text-align: center;
}
[data-site="vietravel"] .concept-tag {
  display: inline-block;
  background: var(--vt-sun);
  color: #3d2a06;
  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="vietravel"] .site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(253, 249, 240, 0.96);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--vt-border);
}
[data-site="vietravel"] .header-inner {
  display: flex;
  align-items: center;
  gap: 1.4rem;
  padding: 0.65rem 0;
}
[data-site="vietravel"] .brand {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  text-decoration: none;
  color: var(--vt-sea);
}
[data-site="vietravel"] .brand-glyph {
  display: grid;
  place-items: center;
  width: 42px; height: 42px;
  background: var(--vt-sea);
  border-radius: 50%;
  color: #ffd58a;
}
[data-site="vietravel"] .brand-text { display: flex; flex-direction: column; line-height: 1.15; }
[data-site="vietravel"] .brand-name {
  font-family: var(--vt-serif);
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--vt-sea);
}
[data-site="vietravel"] .brand-sub {
  font-size: 0.6rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--vt-sun-deep);
  text-transform: uppercase;
}
[data-site="vietravel"] .main-nav { margin-left: auto; }
[data-site="vietravel"] .main-nav ul { display: flex; gap: 0.15rem; flex-wrap: wrap; }
[data-site="vietravel"] .main-nav a {
  display: block;
  text-decoration: none;
  color: var(--vt-text);
  font-weight: 700;
  font-size: 0.9rem;
  padding: 0.55rem 0.9rem;
  border-radius: 10px;
  transition: background var(--vt-t-fast) ease, color var(--vt-t-fast) ease;
}
[data-site="vietravel"] .main-nav a:hover { background: var(--vt-sea); color: #fff; }
[data-site="vietravel"] .header-cta {
  text-decoration: none;
  font-weight: 800;
  font-size: 0.85rem;
  color: #fff;
  background: var(--vt-coral);
  padding: 0.6rem 1.05rem;
  border-radius: 999px;
  white-space: nowrap;
  transition: background var(--vt-t-fast) ease;
}
[data-site="vietravel"] .header-cta:hover { background: #a8441f; }

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

/* ---------- hero ---------- */
[data-site="vietravel"] .hero {
  background:
    radial-gradient(52rem 28rem at 108% -10%, #fdeecf 0%, transparent 60%),
    var(--vt-canvas);
  padding: 3.75rem 0;
}
[data-site="vietravel"] .hero-grid {
  display: grid;
  grid-template-columns: 1.02fr 0.98fr;
  gap: 2.75rem;
  align-items: center;
}
[data-site="vietravel"] .eyebrow {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  flex-wrap: wrap;
  color: var(--vt-sun-deep);
  font-weight: 800;
  font-size: 0.82rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin: 0 0 1rem;
}
[data-site="vietravel"] .eyebrow-dark { color: #5f6d75; }
[data-site="vietravel"] .chip {
  background: var(--vt-sea);
  color: #fff;
  padding: 0.18rem 0.7rem;
  font-size: 0.76rem;
  letter-spacing: 0.08em;
}
[data-site="vietravel"] .hero h1 {
  font-size: clamp(2.5rem, 5.4vw, 4.1rem);
  margin-bottom: 0.35em;
  color: var(--vt-sea);
}
[data-site="vietravel"] .hero h1 em { font-style: italic; color: var(--vt-sun-deep); }
[data-site="vietravel"] .lede { color: var(--vt-muted); max-width: 40rem; }
[data-site="vietravel"] .hero-actions { display: flex; gap: 0.8rem; flex-wrap: wrap; margin-top: 1.5rem; }

[data-site="vietravel"] .btn {
  display: inline-block;
  text-decoration: none;
  font-weight: 800;
  border-radius: 999px;
  padding: 0.85rem 1.6rem;
  transition: transform var(--vt-t-fast) ease, background var(--vt-t-fast) ease, border-color var(--vt-t-fast) ease;
}
[data-site="vietravel"] .btn-sea { background: var(--vt-sea-mid); color: #fff; }
[data-site="vietravel"] .btn-sea:hover { background: var(--vt-sea); transform: translateY(-2px); }
[data-site="vietravel"] .btn-outline { color: var(--vt-sea); border: 2px solid var(--vt-sea-mid); }
[data-site="vietravel"] .btn-outline:hover { border-color: var(--vt-sun-deep); color: var(--vt-sun-deep); }
[data-site="vietravel"] .btn-lg { padding: 1rem 1.9rem; font-size: 1rem; }


/* ---------- metrics ---------- */
[data-site="vietravel"] .metrics { padding: 2.75rem 0; }
[data-site="vietravel"] .metrics-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1rem;
}
[data-site="vietravel"] .metric {
  border-radius: 18px;
  padding: 1.5rem 1.35rem;
}
[data-site="vietravel"] .metric-sea { background: var(--vt-sea); color: #fff; }
[data-site="vietravel"] .metric-sun { background: var(--vt-sun); color: #241906; }
[data-site="vietravel"] .metric-value {
  display: block;
  font-family: var(--vt-serif);
  font-size: 2.3rem;
  font-weight: 700;
  line-height: 1;
  margin-bottom: 0.4rem;
}
[data-site="vietravel"] .metric-label { font-size: 0.86rem; }

/* ---------- sections ---------- */
[data-site="vietravel"] .section { padding: 4rem 0; }
[data-site="vietravel"] .section-head { max-width: 44rem; margin-bottom: 2.25rem; }
[data-site="vietravel"] .section-head h2 { font-size: clamp(1.85rem, 3.5vw, 2.6rem); color: var(--vt-sea); }
[data-site="vietravel"] .section-note { color: var(--vt-muted); }

/* itinerary legs */
[data-site="vietravel"] .legs { display: grid; gap: 0.9rem; }
[data-site="vietravel"] .leg {
  display: grid;
  grid-template-columns: 9rem 1fr;
  gap: 1.5rem;
  align-items: center;
  background: var(--vt-surface);
  border: 1.5px dashed var(--vt-border);
  border-radius: 14px;
  padding: 1.35rem 1.6rem;
  transition: border-color var(--vt-t-fast) ease, transform var(--vt-t-fast) ease;
}
[data-site="vietravel"] .leg:hover { border-color: var(--vt-sun); transform: translateX(4px); }
[data-site="vietravel"] .leg-time {
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  color: var(--vt-coral);
  border: 1.5px solid var(--vt-coral);
  border-radius: 999px;
  padding: 0.3rem 0.7rem;
  text-align: center;
}
[data-site="vietravel"] .leg h3 { font-size: 1.25rem; margin-bottom: 0.25em; }
[data-site="vietravel"] .leg p { margin: 0; color: var(--vt-muted); font-size: 0.94rem; }

/* luggage tags */
[data-site="vietravel"] .tags { background: #f4ecdc; }
[data-site="vietravel"] .tag-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.1rem;
}
[data-site="vietravel"] .luggage {
  position: relative;
  background: var(--vt-surface);
  border: 1.5px solid var(--vt-border);
  border-radius: 4px;
  padding: 2rem 1.4rem 1.5rem;
  display: grid;
  gap: 0.3rem;
  box-shadow: 0 6px 14px -10px rgba(44, 42, 34, 0.35);
}
[data-site="vietravel"] .luggage-hole {
  position: absolute;
  top: 0.8rem; left: 50%;
  transform: translateX(-50%);
  width: 2rem; height: 1rem;
  border: 3px solid var(--vt-border);
  border-bottom: 0;
  border-radius: 1rem 1rem 0 0;
  background: #f4ecdc;
}
[data-site="vietravel"] .luggage strong {
  font-family: var(--vt-serif);
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--vt-sea);
}
[data-site="vietravel"] .luggage span:last-child { color: var(--vt-muted); font-size: 0.9rem; }

/* history */
[data-site="vietravel"] .hist-steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1rem;
  margin-bottom: 2rem;
}
[data-site="vietravel"] .hist-steps li {
  background: var(--vt-surface);
  border: 1.5px dashed var(--vt-border);
  border-radius: 14px;
  padding: 1.4rem 1.35rem;
}
[data-site="vietravel"] .h-year {
  display: block;
  font-family: var(--vt-serif);
  font-size: 1.65rem;
  font-weight: 700;
  color: var(--vt-sun-deep);
  line-height: 1.1;
}
[data-site="vietravel"] .hist-steps p { margin: 0.4em 0 0; color: var(--vt-muted); font-size: 0.92rem; }

[data-site="vietravel"] .fact-card {
  background: var(--vt-surface);
  border: 1.5px solid var(--vt-border);
  padding: 1.5rem 1.6rem;
  display: grid;
  gap: 0.9rem;
  margin: 0;
  max-width: 46rem;
  border-radius: 14px;
}
[data-site="vietravel"] .fact-card div {
  display: grid;
  grid-template-columns: 8.5rem 1fr;
  gap: 0.75rem;
  padding-bottom: 0.9rem;
  border-bottom: 1px dashed var(--vt-border);
}
[data-site="vietravel"] .fact-card div:last-child { border-bottom: 0; padding-bottom: 0; }
[data-site="vietravel"] .fact-card dt {
  font-size: 0.72rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--vt-muted);
}
[data-site="vietravel"] .fact-card dd { margin: 0; font-weight: 600; font-size: 0.95rem; }

/* cta */
[data-site="vietravel"] .cta { padding: 4rem 0; text-align: center; }
[data-site="vietravel"] .cta-inner h2 { font-size: clamp(1.85rem, 3.5vw, 2.5rem); }

/* footer */
[data-site="vietravel"] .site-footer {
  background: #12303f;
  color: #c2d4de;
  padding: 3.25rem 0 2rem;
}
[data-site="vietravel"] .footer-brand { display: flex; align-items: baseline; gap: 0.9rem; margin-bottom: 1.4rem; flex-wrap: wrap; }
[data-site="vietravel"] .f-name { font-family: var(--vt-serif); color: #fff; font-size: 1.4rem; font-weight: 700; }
[data-site="vietravel"] .f-sub { font-size: 0.8rem; color: #f6c55a; }
[data-site="vietravel"] .footer-nav ul { display: flex; flex-wrap: wrap; gap: 0.5rem 1.5rem; margin-bottom: 1.6rem; }
[data-site="vietravel"] .footer-nav a { color: #dfeaf1; text-decoration: none; font-size: 0.9rem; font-weight: 600; }
[data-site="vietravel"] .footer-nav a:hover { color: #f6c55a; }
[data-site="vietravel"] .disclaimer {
  border-top: 1px solid rgba(255, 255, 255, 0.14);
  padding-top: 1.4rem;
  font-size: 0.82rem;
  color: #9fb7c4;
  max-width: 60rem;
}
[data-site="vietravel"] .colophon { font-size: 0.75rem; color: #7f98a6; }

/* ---------- responsive ---------- */
@media (max-width: 1020px) {
  [data-site="vietravel"] .hero-grid { grid-template-columns: 1fr; }
  [data-site="vietravel"] .metrics-grid { grid-template-columns: repeat(2, 1fr); }
  [data-site="vietravel"] .tag-grid { grid-template-columns: 1fr 1fr; }
  [data-site="vietravel"] .hist-steps { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 760px) {
  [data-site="vietravel"] .nav-toggle { display: flex; }
  [data-site="vietravel"] .main-nav {
    display: none;
    position: absolute;
    top: 100%;
    left: 0; right: 0;
    background: var(--vt-canvas);
    border-bottom: 1px solid var(--vt-border);
    padding: 0.75rem 1.25rem 1.25rem;
  }
  [data-site="vietravel"] .main-nav.is-open { display: block; }
  [data-site="vietravel"] .main-nav ul { flex-direction: column; gap: 0.25rem; }
  [data-site="vietravel"] .header-cta { display: none; }
  [data-site="vietravel"] .leg { grid-template-columns: 1fr; gap: 0.6rem; }
}

@media (max-width: 520px) {
  [data-site="vietravel"] .metrics-grid,
  [data-site="vietravel"] .tag-grid,
  [data-site="vietravel"] .hist-steps { grid-template-columns: 1fr; }
  [data-site="vietravel"] .section { padding: 3rem 0; }
  [data-site="vietravel"] .fact-card div { grid-template-columns: 1fr; }
}

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

/* ---------- polish: motion layer (2026+) ---------- */
[data-site="vietravel"] .hero-copy > *,
[data-site="vietravel"] .window {
  animation: vt-board 0.7s cubic-bezier(0.2, 0.7, 0.3, 1) both;
}
[data-site="vietravel"] .hero-copy > *:nth-child(2) { animation-delay: 0.1s; }
[data-site="vietravel"] .hero-copy > *:nth-child(3) { animation-delay: 0.2s; }
[data-site="vietravel"] .hero-copy > *:nth-child(4) { animation-delay: 0.3s; }
[data-site="vietravel"] .hero-copy > *:nth-child(5) { animation-delay: 0.4s; }
[data-site="vietravel"] .window { animation-delay: 0.22s; }
@keyframes vt-board {
  from { transform: translateY(22px); }
}
[data-site="vietravel"] .leg:hover .leg-time {
  display: inline-block;
  animation: vt-punch 0.45s ease;
}
@keyframes vt-punch {
  40% { transform: scale(1.1) rotate(-2deg); }
}
@supports (animation-timeline: view()) {
  @media (prefers-reduced-motion: no-preference) {
    [data-site="vietravel"] .section-head,
    [data-site="vietravel"] .metrics-grid,
    [data-site="vietravel"] .legs,
    [data-site="vietravel"] .tag-grid,
    [data-site="vietravel"] .hist-steps,
    [data-site="vietravel"] .fact-card {
      animation: vt-rise linear both;
      animation-timeline: view();
      animation-range: entry 0% cover 26%;
    }
    @keyframes vt-rise {
      from { transform: translateY(30px); }
    }
  }
}

/* ---------- hero window + destination postcards: real photography ---------- */
[data-site="vietravel"] .window {
  position: relative;
  margin: 0;
  aspect-ratio: 4 / 3.4;
  /* the aircraft-window viewport: the radius token the design system declares */
  border-radius: 999px 999px 1.25rem 1.25rem;
  overflow: hidden;
  background: #0a4666;
  box-shadow: 0 28px 56px -38px rgba(10, 70, 102, 0.8);
}
[data-site="vietravel"] .window img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: saturate(0.97) contrast(1.05) brightness(1.02);
}
[data-site="vietravel"] .window figcaption {
  position: absolute;
  left: 0; right: 0; bottom: 0;
  padding: 34px 18px 13px;
  font-size: 0.7rem;
  letter-spacing: 0.02em;
  color: #eaf3f8;
  background: linear-gradient(transparent, rgba(8, 44, 66, 0.9));
}
[data-site="vietravel"] .postcards { padding-block: 3rem 1rem; }
[data-site="vietravel"] .post-head { max-width: 44rem; margin-bottom: 1.5rem; }
[data-site="vietravel"] .post-plates {
  list-style: none; margin: 0; padding: 0;
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.15rem;
}
[data-site="vietravel"] .post-plates figure {
  position: relative; margin: 0; aspect-ratio: 4 / 3;
  overflow: hidden; background: #0a4666;
  /* postcard + stamp-perforation language kept on the real photographs */
  --lug: 12px;
  /* layer height must be 100%: a shorter layer leaves the rest of the frame
     unmasked (transparent), which silently clips the photo AND its figcaption.
     Two half-width layers union to full coverage, each punching one notch. */
  -webkit-mask:
    radial-gradient(var(--lug) at 0 12%, #0000 98%, #000) top left / 51% 100% no-repeat,
    radial-gradient(var(--lug) at 100% 12%, #0000 98%, #000) top right / 51% 100% no-repeat;
  mask:
    radial-gradient(var(--lug) at 0 12%, #0000 98%, #000) top left / 51% 100% no-repeat,
    radial-gradient(var(--lug) at 100% 12%, #0000 98%, #000) top right / 51% 100% no-repeat;
}
[data-site="vietravel"] .post-plates img {
  position: absolute; inset: 0; width: 100%; height: 100%;
  object-fit: cover; filter: saturate(0.97) contrast(1.05);
}
[data-site="vietravel"] .post-plates figcaption {
  position: absolute; left: 0; right: 0; bottom: 0; z-index: 2;
  display: flex; flex-direction: column; gap: 3px;
  padding: 34px 16px 13px; color: #fff;
  background: linear-gradient(transparent, rgba(8, 44, 66, 0.9));
}
[data-site="vietravel"] .post-plates figcaption strong { font-family: var(--vt-serif); font-size: 1.16rem; font-weight: 600; }
[data-site="vietravel"] .plate-credit { font-size: 0.68rem; line-height: 1.35; color: #dbe9f1; }
@media (max-width: 900px) {
  [data-site="vietravel"] .post-plates { grid-template-columns: 1fr; }
  [data-site="vietravel"] .post-plates figure { aspect-ratio: 16 / 10; }
}