/* Saintix — landing page.
 *
 * Hai nguồn cho bảng thiết kế này:
 *
 *  - Màu thương hiệu lấy từ design token đã đăng ký của sản phẩm
 *    (apps/customer/src/theme.ts). Trang giới thiệu và ứng dụng phải trông như
 *    cùng một sản phẩm.
 *  - Tỉ lệ chữ, nhịp khoảng cách và độ bo góc đo từ trang tham chiếu mà chủ sản
 *    phẩm chọn. Đo thông số rồi tự dựng, không lấy mã nguồn của họ.
 *
 * Điều làm nên vẻ tiết chế ở đây, và rất dễ làm hỏng: bo góc gần vuông (4px chứ
 * không phải 24px), chữ tiêu đề weight 500 chứ không phải 800, và giãn dòng
 * chặt. To và đậm lên là lập tức thành một trang SaaS mẫu.
 */

:root {
  /* thương hiệu — token sản phẩm */
  --brand: #ff8935;
  --brand-2: #ffb020;
  --brand-deep: #b4400e;

  /* nền tối: gần đen nhưng có hơi ấm, không phải đen tuyệt đối */
  --ink: #161616;
  --ink-2: #1c1c1c;
  --ink-line: rgba(255, 255, 255, 0.1);
  --on-ink: #f2efec;
  --on-ink-dim: rgba(242, 239, 236, 0.58);

  /* nền sáng: xám ấm, không phải trắng */
  --paper: #e6e3e0;
  --paper-2: #e0dcd8;
  --on-paper: #212121;
  --on-paper-dim: rgba(33, 33, 33, 0.62);
  --paper-line: rgba(33, 33, 33, 0.14);

  --r: 4px;
  --r-lg: 6px;
  --wrap: 1240px;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }

body {
  margin: 0;
  background: var(--ink);
  color: var(--on-ink);
  font-family: "Schibsted Grotesk", "Noto Sans CJK SC", "PingFang SC", system-ui, sans-serif;
  font-size: 18px;
  line-height: 1.36;
  font-weight: 400;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

h1, h2, h3, h4 { margin: 0; font-weight: 500; letter-spacing: -0.025em; line-height: 1.1; text-wrap: balance; }
p { margin: 0; }
a { color: inherit; text-decoration: none; }
ul, ol { margin: 0; padding: 0; list-style: none; }
img { max-width: 100%; display: block; }

.wrap { width: min(100% - 48px, var(--wrap)); margin-inline: auto; }

/* Nhãn nhỏ chữ hoa: dùng làm mốc chia phần, không phải để trang trí. */
.label {
  font-size: 13px; font-weight: 500; letter-spacing: 0.04em;
  color: var(--brand); display: flex; align-items: center; gap: 9px;
}
.label::before { content: ""; width: 22px; height: 1px; background: currentColor; }

.h2 { font-size: clamp(30px, 3.7vw, 46px); }
.lede { margin-top: 16px; font-size: 18px; line-height: 1.45; color: var(--on-ink-dim); max-width: 58ch; }

section { position: relative; }
.band-paper { background: var(--paper); color: var(--on-paper); }
/* Ke doc mo chay suot chieu cao band: mot luoi cot lo ra vua du thay. */
.band-paper::before, .band-paper-2::before {
  content: ""; position: absolute; inset: 0; pointer-events: none;
  width: min(100% - 48px, var(--wrap)); margin-inline: auto;
  background-image: linear-gradient(90deg, var(--paper-line) 1px, transparent 1px);
  background-size: calc(100% / 3) 100%;
  opacity: .55;
}
.band-paper .lede { color: var(--on-paper-dim); }
.band-paper .label { color: var(--brand-deep); }
.band-paper-2 { background: var(--paper-2); color: var(--on-paper); }
.band-paper-2 .lede { color: var(--on-paper-dim); }
.band-paper-2 .label { color: var(--brand-deep); }

.pad { padding: clamp(72px, 8.5vw, 128px) 0; }

/* ─────────────────────────────────────────────── thanh tiến trình ─── */
.rail { position: fixed; inset: 0 0 auto 0; height: 2px; z-index: 90; }
.rail span { display: block; height: 100%; width: 0; background: var(--brand); }

/* ───────────────────────────────────────────────────────────── nav ─── */
.nav {
  position: fixed; inset: 0 0 auto 0; z-index: 80;
  display: flex; align-items: center; gap: 30px;
  padding: 14px max(24px, calc((100vw - var(--wrap)) / 2));
  border-bottom: 1px solid transparent;
  transition: background .35s var(--ease), border-color .35s, color .35s;
}
.nav.is-paper { background: rgba(230, 227, 224, 0.88); backdrop-filter: blur(14px); border-bottom-color: var(--paper-line); color: var(--on-paper); }
.nav__brand { display: flex; align-items: center; gap: 9px; font-weight: 500; font-size: 17px; letter-spacing: -0.02em; }
.nav__mark { width: 18px; height: 18px; border-radius: 3px; background: var(--brand); flex: none; }
.nav__links { display: flex; gap: 24px; margin-left: auto; font-size: 15px; }
.nav__links a { opacity: .72; transition: opacity .2s; }
.nav__links a:hover { opacity: 1; }
.nav__cta { display: flex; gap: 8px; }

/* ────────────────────────────────────────────────────────────── nút ─── */
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  height: 40px; padding: 0 20px; border-radius: 999px;
  font-size: 15px; font-weight: 500; white-space: nowrap;
  border: 1px solid transparent; cursor: pointer;
  transition: background .2s, border-color .2s, color .2s, opacity .2s;
}
.btn--lg { height: 48px; padding: 0 26px; font-size: 16px; }
.btn--solid { background: var(--paper); color: #161616; }
.btn--solid:hover { background: #fff; }
.btn--line { border-color: var(--ink-line); color: inherit; }
.btn--line:hover { border-color: currentColor; }
.band-paper .btn--line, .band-paper-2 .btn--line { border-color: var(--paper-line); }
.nav.is-paper .btn--line { border-color: var(--paper-line); }
.btn:focus-visible { outline: 2px solid var(--brand); outline-offset: 2px; }

/* ──────────────────────────────────────────────────────────── hero ─── */
.hero { padding: clamp(120px, 13vw, 168px) 0 clamp(60px, 7vw, 92px); overflow: hidden; }
.hero__grid {
  display: grid; gap: clamp(40px, 5vw, 72px);
  grid-template-columns: minmax(0, 1.02fr) minmax(0, 0.98fr);
  align-items: center;
}
.hero__title {
  margin-top: 22px;
  font-size: clamp(36px, 4.4vw, 58px);
  letter-spacing: -0.03em;
}
.hero__title .line { display: block; overflow: hidden; padding-bottom: .04em; }
.hero__title [data-word] { display: inline-block; will-change: transform; }
.hero__title em { font-style: normal; color: var(--brand); }
.hero__body { margin-top: 20px; max-width: 46ch; color: var(--on-ink-dim); }
.hero__actions { display: flex; gap: 10px; flex-wrap: wrap; margin-top: 30px; }
.hero__meta { margin-top: 34px; display: flex; gap: 26px; flex-wrap: wrap; font-size: 14px; color: var(--on-ink-dim); }
.hero__meta b { color: var(--on-ink); font-weight: 500; }

/* thẻ */
.stage { position: relative; perspective: 1300px; }
.card {
  position: relative; aspect-ratio: 1.586; border-radius: var(--r-lg);
  background: linear-gradient(147deg, #2a2a2c 0%, #171719 55%, #0f0f10 100%);
  border: 1px solid rgba(255, 255, 255, 0.09);
  box-shadow: 0 32px 70px -30px rgba(0, 0, 0, .9);
  padding: 24px; display: flex; flex-direction: column; justify-content: space-between;
  transform-style: preserve-3d; overflow: hidden;
}
.card__sheen {
  position: absolute; inset: -60% -20%;
  background: linear-gradient(72deg, transparent 44%, rgba(255,255,255,.1) 50%, transparent 56%);
  translate: -70% 0;
}
.card__top { display: flex; justify-content: space-between; align-items: flex-start; }
.card__brand { font-size: 12px; font-weight: 500; letter-spacing: .18em; }
.card__chip { width: 34px; height: 25px; border-radius: 3px; background: linear-gradient(140deg, #d9b96d, #f2e0ab 46%, #b5904a); }
.card__num { display: flex; gap: 13px; font-size: 15px; letter-spacing: .07em; color: rgba(242,239,236,.86); }
.card__foot { display: flex; align-items: flex-end; gap: 20px; }
.card__foot small { display: block; font-size: 8px; letter-spacing: .13em; color: rgba(242,239,236,.4); margin-bottom: 2px; }
.card__foot b { font-size: 11.5px; font-weight: 400; letter-spacing: .04em; color: rgba(242,239,236,.84); }
.card__net { margin-left: auto; font-style: italic; font-weight: 700; font-size: 18px; }

/* thẻ số liệu nổi trên mặt thẻ */
.chip {
  position: absolute; z-index: 2; top: -18px; right: -10px;
  background: var(--paper); color: var(--on-paper);
  border-radius: var(--r); padding: 13px 16px;
  box-shadow: 0 18px 40px -18px rgba(0,0,0,.7);
  display: grid; gap: 3px; min-width: 190px;
}
.chip__k { font-size: 11.5px; color: var(--on-paper-dim); }
.chip__v { font-size: 21px; font-weight: 500; letter-spacing: -0.02em; }
.chip__v i { font-style: normal; color: var(--brand-deep); }
.chip__m { font-size: 11.5px; color: var(--on-paper-dim); }
@media (max-width: 560px) { .chip { right: 0; top: -14px; min-width: 0; } }

/* ─────────────────────────────────────────────────────── băng chạy ─── */
.strip { border-top: 1px solid var(--ink-line); border-bottom: 1px solid var(--ink-line); padding: 14px 0; overflow: hidden; }
.strip__row { display: flex; gap: 22px; width: max-content; white-space: nowrap; align-items: center; }
.strip__row span { font-size: 13.5px; color: var(--on-ink-dim); }
.strip__row i { color: var(--brand); font-style: normal; font-size: 11px; }

/* ─────────────────────────────────────────────────────────── stats ─── */
.stats__grid { display: grid; gap: 1px; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); background: var(--paper-line); border: 1px solid var(--paper-line); border-radius: var(--r); overflow: hidden; }
.stat { background: var(--paper); padding: 30px 26px; }
.stat b { display: block; font-size: clamp(34px, 3.6vw, 46px); font-weight: 500; letter-spacing: -0.03em; }
.stat p { margin-top: 8px; font-size: 15px; line-height: 1.45; color: var(--on-paper-dim); }

/* ─────────────────────────────────────────────────────────── steps ─── */
.head { display: flex; justify-content: space-between; align-items: flex-end; gap: 30px; flex-wrap: wrap; }
.head__t { max-width: 22ch; }
.steps__list { display: grid; gap: 1px; grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); margin-top: 52px; background: var(--ink-line); border: 1px solid var(--ink-line); border-radius: var(--r); overflow: hidden; }
.band-paper .steps__list, .band-paper-2 .steps__list { background: var(--paper-line); border-color: var(--paper-line); }
.step { background: var(--ink); padding: 28px 26px 30px; transition: background .3s; }
.band-paper .step { background: var(--paper); }
.band-paper .step:hover { background: var(--paper-2); }
.step:hover { background: var(--ink-2); }
.step__n { font-size: 12.5px; font-weight: 500; color: var(--brand-deep); letter-spacing: .06em; }
.band-paper .step__n { color: var(--brand-deep); }
.step h3 { font-size: 20px; margin: 16px 0 9px; }
.step p { font-size: 15.5px; line-height: 1.45; color: var(--on-paper-dim); }

/* ─────────────────────────────────────────────────────────── tiers ─── */
.tiers__grid { display: grid; gap: 16px; grid-template-columns: repeat(auto-fit, minmax(310px, 1fr)); margin-top: 48px; }
.tier { border: 1px solid var(--ink-line); border-radius: var(--r); padding: 28px 26px; transition: border-color .3s; }
.tier:hover { border-color: rgba(255,255,255,.22); }
.tier--hi { background: var(--brand); color: #180c02; border-color: transparent; }
.tier--hi .tier__p, .tier--hi li { color: rgba(24,12,2,.78); }
.tier--hi li { border-color: rgba(24,12,2,.18); }
.tier header { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; }
.tier h3 { font-size: 21px; }
.tier__tag { font-size: 11.5px; font-weight: 500; padding: 3px 9px; border-radius: 3px; border: 1px solid currentColor; opacity: .7; }
.tier__p { margin-top: 12px; font-size: 15.5px; line-height: 1.45; color: var(--on-ink-dim); }
.tier ul { margin-top: 20px; }
.tier li { padding: 12px 0 12px 20px; border-top: 1px solid var(--ink-line); font-size: 15px; position: relative; color: var(--on-ink-dim); }
.tier li::before { content: "—"; position: absolute; left: 0; opacity: .55; }
.note { margin-top: 22px; font-size: 14.5px; color: var(--on-ink-dim); }

/* ─────────────────────────────────────────────────────────── feats ─── */
.rows { margin-top: 52px; position: relative; }
.row {
  display: grid; gap: 28px; align-items: start;
  grid-template-columns: 132px minmax(0, 1fr) minmax(0, 1.15fr);
  padding: 30px 0; border-top: 1px solid var(--paper-line);
}
.row:last-child { border-bottom: 1px solid var(--paper-line); }
.row__viz {
  aspect-ratio: 1.18; border-radius: var(--r); background: rgba(255,255,255,.5);
  border: 1px solid var(--paper-line); display: grid; place-items: center;
  font-size: 22px; color: var(--brand-deep);
}
.row h3 { font-size: clamp(20px, 2.1vw, 26px); }
.row__say { font-size: 17px; line-height: 1.4; }
.row__sub { margin-top: 9px; font-size: 15px; line-height: 1.5; color: var(--on-paper-dim); }
@media (max-width: 820px) {
  .row { grid-template-columns: 84px 1fr; }
  .row__body { grid-column: 1 / -1; }
}

/* ──────────────────────────────────────────────────────────── safe ─── */
.safe__grid { display: grid; gap: clamp(36px, 5vw, 68px); grid-template-columns: 1.1fr .9fr; align-items: start; }
.safe__list { margin-top: 30px; border-top: 1px solid var(--ink-line); }
.safe__list li { padding: 16px 0; border-bottom: 1px solid var(--ink-line); font-size: 15.5px; line-height: 1.45; color: var(--on-ink-dim); }
.safe__list b { color: var(--on-ink); font-weight: 500; }

/* ───────────────────────────────────────────────────────────── cta ─── */
.cta__inner { border: 1px solid var(--paper-line); border-radius: var(--r); padding: clamp(38px, 5.5vw, 66px); display: flex; justify-content: space-between; align-items: center; gap: 32px; flex-wrap: wrap; }
.cta__inner h2 { max-width: 18ch; }
.cta__inner p { margin-top: 12px; color: var(--on-paper-dim); max-width: 42ch; font-size: 16px; }

/* ──────────────────────────────────────────────────────────── foot ─── */
.foot { padding: 56px 0 26px; border-top: 1px solid var(--ink-line); }
.foot__grid { display: grid; gap: 38px; grid-template-columns: 1.2fr 1.8fr; }
.foot__brand { display: flex; gap: 10px; align-items: flex-start; }
.foot__brand b { font-weight: 500; }
.foot__brand p { margin-top: 4px; font-size: 14px; color: var(--on-ink-dim); max-width: 26ch; }
.foot__cols { display: grid; gap: 24px; grid-template-columns: repeat(auto-fit, minmax(125px, 1fr)); }
.foot__cols h4 { font-size: 12.5px; color: var(--on-ink-dim); font-weight: 400; margin-bottom: 10px; }
.foot__cols a { display: block; padding: 4px 0; font-size: 14.5px; color: var(--on-ink-dim); transition: color .2s; }
.foot__cols a:hover { color: var(--on-ink); }
.foot__legal { margin-top: 40px; padding-top: 20px; border-top: 1px solid var(--ink-line); font-size: 13px; color: var(--on-ink-dim); }

/* ────────────────────────────────────────────────────────── mobile ─── */
@media (max-width: 940px) {
  .hero__grid, .safe__grid, .foot__grid { grid-template-columns: 1fr; }
  .stage { max-width: 420px; }
}
@media (max-width: 760px) {
  .nav__links { display: none; }
  .nav__cta .btn--line { display: none; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: .001ms !important; transition-duration: .001ms !important; }
}