/* Một bộ style duy nhất, không thư viện ngoài: trang phải mở được nhanh và
   không phụ thuộc mạng của bên thứ ba khi Apple hay D&B vào xem. */
:root {
  --ink: #16182b;
  --ink-muted: #5a5f7a;
  --bg: #ffffff;
  --bg-soft: #f5f6fb;
  --brand: #4a3fd6;
  --brand-soft: #eceaff;
  --line: #e4e6f0;
  --radius: 14px;
  --wrap: 1080px;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  color: var(--ink);
  background: var(--bg);
  font: 16px/1.65 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
    "Helvetica Neue", Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
}

.wrap { width: min(var(--wrap), 100% - 40px); margin-inline: auto; }

.skip {
  position: absolute;
  left: -9999px;
}
.skip:focus {
  left: 12px;
  top: 12px;
  z-index: 10;
  background: #fff;
  padding: 10px 14px;
  border-radius: 10px;
  border: 1px solid var(--line);
}

/* ── đầu trang ─────────────────────────────────────────────── */
.site-head {
  position: sticky;
  top: 0;
  z-index: 5;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line);
}
.head-row {
  display: flex;
  align-items: center;
  gap: 20px;
  min-height: 68px;
}
.brand { display: flex; align-items: center; gap: 12px; text-decoration: none; color: inherit; }
.brand-mark {
  display: grid;
  place-items: center;
  width: 38px;
  height: 38px;
  border-radius: 11px;
  background: var(--brand);
  color: #fff;
  font-weight: 800;
  letter-spacing: 0.5px;
}
.brand-text { display: flex; flex-direction: column; line-height: 1.2; }
.brand-text strong { letter-spacing: 1px; }
.brand-text small { color: var(--ink-muted); font-size: 12px; }

.nav { margin-left: auto; display: flex; gap: 22px; }
.nav a { color: var(--ink-muted); text-decoration: none; font-size: 15px; }
.nav a:hover { color: var(--brand); }

.lang-btn {
  border: 1px solid var(--line);
  background: #fff;
  color: var(--ink);
  border-radius: 999px;
  padding: 7px 14px;
  font-weight: 700;
  font-size: 13px;
  cursor: pointer;
}
.lang-btn:hover { border-color: var(--brand); color: var(--brand); }

/* ── nội dung ──────────────────────────────────────────────── */
.hero {
  background: linear-gradient(180deg, var(--brand-soft), #fff);
  padding: 76px 0 64px;
  border-bottom: 1px solid var(--line);
}
.eyebrow { color: var(--brand); font-weight: 600; margin: 0 0 8px; }
.hero h1 { margin: 0; font-size: clamp(38px, 7vw, 62px); letter-spacing: 2px; }
.lead { max-width: 62ch; color: var(--ink-muted); font-size: 18px; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 26px; }

.btn {
  display: inline-block;
  background: var(--brand);
  color: #fff;
  text-decoration: none;
  padding: 12px 22px;
  border-radius: 999px;
  font-weight: 600;
}
.btn.ghost { background: #fff; color: var(--brand); border: 1px solid var(--brand); }

.section { padding: 56px 0; border-bottom: 1px solid var(--line); }
.section h2 { font-size: 26px; margin: 0 0 16px; }
.section p { max-width: 74ch; color: var(--ink-muted); }

.cards { display: grid; gap: 16px; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); }
.card {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 20px;
  background: var(--bg-soft);
}
.card h3 { margin: 0 0 8px; font-size: 18px; }
.card p { margin: 0; }

.product {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 22px;
}
.product h3 { margin: 0 0 8px; font-size: 20px; }
.ticks { margin: 14px 0 0; padding: 0; list-style: none; color: var(--ink-muted); }
.ticks li { position: relative; padding-left: 26px; margin-bottom: 6px; }
.ticks li::before {
  content: "✓";
  position: absolute;
  left: 0;
  color: var(--brand);
  font-weight: 700;
}

.facts { display: grid; gap: 14px; margin: 0; }
.facts > div {
  display: grid;
  grid-template-columns: minmax(180px, 240px) 1fr;
  gap: 8px 20px;
  padding-bottom: 12px;
  border-bottom: 1px dashed var(--line);
}
.facts dt { color: var(--ink-muted); }
.facts dd { margin: 0; font-weight: 600; }

.contact-row { display: grid; gap: 14px; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); }
.contact-card {
  display: block;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 16px 18px;
  text-decoration: none;
  color: inherit;
  background: var(--bg-soft);
}
a.contact-card:hover { border-color: var(--brand); }
.contact-card span { display: block; color: var(--ink-muted); font-size: 13px; margin-bottom: 4px; }
.contact-card strong { font-size: 17px; word-break: break-word; }

/* ── chân trang ────────────────────────────────────────────── */
.site-foot { padding: 26px 0 40px; }
.foot-row { display: flex; flex-wrap: wrap; gap: 12px 24px; align-items: center; justify-content: space-between; }
.foot-row p { margin: 0; color: var(--ink-muted); font-size: 14px; }
.foot-nav { display: flex; gap: 18px; flex-wrap: wrap; }
.foot-nav a { color: var(--ink-muted); font-size: 14px; }

/* ── trang văn bản (chính sách, điều khoản, hỗ trợ) ─────────── */
.doc { padding: 40px 0 10px; }
.doc h1 { font-size: 30px; margin-bottom: 4px; }
.doc .updated { color: var(--ink-muted); font-size: 14px; margin-top: 0; }
.doc h2 { font-size: 20px; margin-top: 30px; }
.doc p, .doc li { color: var(--ink-muted); max-width: 76ch; }
.doc a { color: var(--brand); }

/* ── song ngữ: chỉ hiện phần đang chọn ─────────────────────── */
[data-vi][data-en]::after { content: attr(data-vi); }
html[lang="en"] [data-vi][data-en]::after { content: attr(data-en); }
.vi-only { display: revert; }
.en-only { display: none; }
html[lang="en"] .vi-only { display: none; }
html[lang="en"] .en-only { display: revert; }

@media (max-width: 760px) {
  .nav { display: none; }
  .facts > div { grid-template-columns: 1fr; }
}