/* ==========================================================================
   NHB-online — static site
   Palette taken from the brand's own bubble animation (#4143B4).
   One typeface: Be Vietnam Pro (full Latin + Vietnamese coverage).
   ========================================================================== */

:root{
  --indigo:#4143B4;
  --indigo-deep:#2C2E84;
  --indigo-soft:#EDEDFA;
  --ink:#141430;
  --ink-60:#54546E;
  --ink-40:#83839B;
  --paper:#FFFFFF;
  --mist:#F4F4FA;
  --line:#E3E3EF;

  --radius:14px;
  --radius-lg:26px;
  --shell:1180px;
  --gutter:clamp(20px,5vw,48px);
  --band:clamp(64px,8vw,118px);

  --fs-xs:.8125rem;
  --fs-sm:.9375rem;
  --fs-base:1.0625rem;
  --fs-lg:1.1875rem;
  --fs-xl:1.4375rem;
  --fs-2xl:clamp(1.75rem,3.4vw,2.5rem);
  --fs-3xl:clamp(1.95rem,3.7vw,2.9rem);
  --fs-hero:clamp(2.05rem,3.9vw,3.2rem);

  --font:"Be Vietnam Pro","Segoe UI",system-ui,-apple-system,"Helvetica Neue",Arial,sans-serif;
}

*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}}

body{
  margin:0;
  background:var(--paper);
  color:var(--ink);
  font-family:var(--font);
  font-size:var(--fs-base);
  line-height:1.62;
  font-weight:400;
  -webkit-font-smoothing:antialiased;
}

img,video{max-width:100%;display:block}
a{color:inherit}
h1,h2,h3,h4{margin:0;line-height:1.12;letter-spacing:-.022em;font-weight:800}
h1{font-size:var(--fs-hero)}
h2{font-size:var(--fs-3xl)}
h3{font-size:var(--fs-xl);letter-spacing:-.015em}
p{margin:0}
ul{margin:0;padding:0}

:focus-visible{outline:3px solid var(--indigo);outline-offset:3px;border-radius:4px}

.shell{width:100%;max-width:var(--shell);margin-inline:auto;padding-inline:var(--gutter)}
.band{padding-block:var(--band)}
.band--mist{background:var(--mist)}
.lede{font-size:var(--fs-lg);color:var(--ink-60);max-width:56ch;line-height:1.55}
.skip{position:absolute;left:-9999px}
.skip:focus{left:var(--gutter);top:10px;z-index:100;background:var(--ink);color:#fff;padding:10px 16px;border-radius:8px}

/* ---------- buttons ------------------------------------------------ */
.btn{
  display:inline-flex;align-items:center;gap:.55em;
  font-weight:600;font-size:var(--fs-sm);letter-spacing:.005em;
  padding:.92em 1.5em;border-radius:999px;border:1.5px solid transparent;
  text-decoration:none;cursor:pointer;
  transition:background-color .18s ease,color .18s ease,border-color .18s ease;
}
.btn--solid{background:var(--indigo);color:#fff}
.btn--solid:hover{background:var(--indigo-deep)}
.btn--ghost{border-color:var(--line);color:var(--ink);background:transparent}
.btn--ghost:hover{border-color:var(--indigo);color:var(--indigo)}
.btn--light{background:#fff;color:var(--indigo)}
.btn--light:hover{background:var(--indigo-soft)}
.btn svg{width:1em;height:1em;flex:none}

/* ---------- header -------------------------------------------------- */
.hdr{
  position:sticky;top:0;z-index:60;
  background:rgba(255,255,255,.92);
  backdrop-filter:saturate(1.4) blur(10px);
  border-bottom:1px solid transparent;
  transition:border-color .2s ease;
}
.hdr.is-stuck{border-bottom-color:var(--line)}
.hdr__in{display:flex;align-items:center;gap:clamp(14px,3vw,36px);min-height:72px}
.brand{display:flex;align-items:center;gap:10px;text-decoration:none;font-weight:800;letter-spacing:-.03em;font-size:1.0625rem}
.brand img{width:32px;height:32px}

.nav{display:flex;align-items:center;gap:4px;margin-inline-start:auto;list-style:none}
.nav a,.nav__btn{
  display:inline-flex;align-items:center;gap:.4em;
  font-size:var(--fs-sm);font-weight:500;color:var(--ink);
  text-decoration:none;padding:.5em .78em;border-radius:9px;background:none;border:0;
  font-family:inherit;cursor:pointer;
}
.nav a:hover,.nav__btn:hover{background:var(--indigo-soft);color:var(--indigo-deep)}
.nav a[aria-current="page"]{color:var(--indigo);font-weight:600}
.nav__drop{position:relative}
.nav__menu{
  position:absolute;top:calc(100% + 8px);left:0;min-width:210px;
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  box-shadow:0 18px 40px -20px rgba(20,20,48,.35);
  padding:7px;list-style:none;display:none;
}
.nav__drop[data-open="true"] .nav__menu{display:block}
.nav__menu a{display:block;padding:.6em .7em}
.nav__btn svg{width:11px;height:11px;transition:transform .18s ease}
.nav__drop[data-open="true"] .nav__btn svg{transform:rotate(180deg)}

.lang{position:relative}
.lang__btn{
  display:inline-flex;align-items:center;gap:.45em;
  font-family:inherit;font-size:var(--fs-sm);font-weight:600;
  border:1.5px solid var(--line);background:none;color:var(--ink);
  padding:.45em .8em;border-radius:999px;cursor:pointer;
}
.lang__btn:hover{border-color:var(--indigo);color:var(--indigo)}
.lang__menu{
  position:absolute;top:calc(100% + 8px);right:0;min-width:160px;
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  box-shadow:0 18px 40px -20px rgba(20,20,48,.35);padding:7px;list-style:none;display:none;
}
.lang[data-open="true"] .lang__menu{display:block}
.lang__menu a{display:block;padding:.55em .7em;border-radius:9px;text-decoration:none;font-size:var(--fs-sm)}
.lang__menu a:hover{background:var(--indigo-soft)}
.lang__menu a[aria-current="true"]{color:var(--indigo);font-weight:600}

.burger{display:none;margin-inline-start:auto;background:none;border:0;padding:8px;cursor:pointer;color:var(--ink)}
.burger svg{width:24px;height:24px}

@media (max-width:920px){
  .nav,.hdr .btn{display:none}
  .burger{display:inline-flex}
  .lang{margin-inline-start:auto}
}

/* mobile drawer */
.drawer{position:fixed;inset:0;z-index:80;background:#fff;display:none;flex-direction:column;overflow-y:auto}
.drawer[data-open="true"]{display:flex}
.drawer__top{display:flex;align-items:center;min-height:72px;border-bottom:1px solid var(--line)}
.drawer__close{margin-inline-start:auto;background:none;border:0;padding:8px;cursor:pointer;color:var(--ink)}
.drawer__close svg{width:24px;height:24px}
.drawer nav{padding:26px var(--gutter) 40px;display:flex;flex-direction:column;gap:2px}
.drawer nav a{text-decoration:none;font-size:1.35rem;font-weight:700;letter-spacing:-.02em;padding:.5em 0;border-bottom:1px solid var(--line)}
.drawer nav a.sub{font-size:1.05rem;font-weight:500;padding-inline-start:16px;color:var(--ink-60)}
.drawer .btn{margin-top:26px;align-self:flex-start}

/* ---------- hero ---------------------------------------------------- */
.hero{padding-block:clamp(48px,6.5vw,86px) 0}
.hero__in{display:grid;grid-template-columns:minmax(0,1.38fr) minmax(0,.62fr);gap:clamp(26px,4vw,60px);align-items:end}
.hero h1{max-width:21ch}
.hero__side p{max-width:42ch;font-size:var(--fs-lg);color:var(--ink-60)}
.hero__side .btn{margin-top:26px}
@media (max-width:900px){
  .hero__in{grid-template-columns:1fr;align-items:start}
  .hero__side{margin-top:6px}
}

.bubbles{margin-top:clamp(44px,6vw,76px);background:#fff;overflow:hidden}
.bubbles video,.bubbles img{width:100%;height:auto}

/* ---------- section head -------------------------------------------- */
.head{max-width:62ch}
.head h2{max-width:20ch}
.head p{margin-top:18px}
.head--wide{max-width:none}
.head--wide h2{max-width:26ch}

/* ---------- reasons (3 up) ------------------------------------------ */
.reasons{margin-top:clamp(40px,5vw,64px);display:grid;gap:clamp(28px,4vw,52px);grid-template-columns:repeat(3,1fr)}
.reason h3{margin-top:22px}
.reason p{margin-top:12px;color:var(--ink-60);font-size:var(--fs-sm);max-width:36ch}
.disc{
  width:54px;height:54px;border-radius:999px;background:var(--indigo);
  display:grid;place-items:center;color:#fff;flex:none;
}
.disc svg{width:24px;height:24px}
@media (max-width:820px){.reasons{grid-template-columns:1fr}}

/* ---------- marquee -------------------------------------------------- */
.marquee{overflow:hidden;-webkit-mask-image:linear-gradient(90deg,transparent,#000 8%,#000 92%,transparent);mask-image:linear-gradient(90deg,transparent,#000 8%,#000 92%,transparent)}
.marquee__track{display:flex;width:max-content;gap:18px;animation:slide 46s linear infinite}
.marquee--rev .marquee__track{animation-direction:reverse;animation-duration:54s}
.marquee:hover .marquee__track{animation-play-state:paused}
@keyframes slide{from{transform:translateX(0)}to{transform:translateX(-50%)}}
@media (prefers-reduced-motion:reduce){.marquee__track{animation:none;flex-wrap:wrap;width:auto;justify-content:center}}
.tile{
  width:170px;height:96px;flex:none;border:1px solid var(--line);border-radius:var(--radius);
  background:#fff;display:grid;place-items:center;padding:16px;
}
.tile img{max-height:52px;width:auto;object-fit:contain}
.tile .fallback{font-size:var(--fs-xs);font-weight:600;color:var(--ink-40);text-align:center}

/* ---------- services grid -------------------------------------------- */
.services{margin-top:clamp(40px,5vw,64px);display:grid;gap:22px;grid-template-columns:repeat(3,1fr)}
.service{background:#fff;border:1px solid var(--line);border-radius:var(--radius-lg);padding:30px 28px 32px}
.service h3{margin-top:20px;font-size:var(--fs-lg)}
.service p{margin-top:10px;color:var(--ink-60);font-size:var(--fs-sm)}
@media (max-width:980px){.services{grid-template-columns:repeat(2,1fr)}}
@media (max-width:620px){.services{grid-template-columns:1fr}}

/* ---------- trust ------------------------------------------------------ */
.trust{margin-top:clamp(40px,5vw,64px);display:grid;gap:26px;grid-template-columns:repeat(2,1fr)}
.trust__card{border:1px solid var(--line);border-radius:var(--radius-lg);padding:34px 32px;background:#fff;display:flex;flex-direction:column}
.trust__card p{margin-top:16px;color:var(--ink-60);font-size:var(--fs-sm)}
.trust__card strong{color:var(--ink);font-weight:700}
.trust__logo{margin-top:auto;padding-top:30px}
.trust__logo img{max-height:82px;width:auto}
@media (max-width:820px){.trust{grid-template-columns:1fr}}

/* ---------- split (dashboard + reporting list) -------------------------- */
.split{display:grid;gap:clamp(32px,5vw,64px);grid-template-columns:1.05fr .95fr;align-items:center}
.split img{border-radius:var(--radius-lg);border:1px solid var(--line)}
.checks{margin-top:26px;list-style:none;display:flex;flex-direction:column;gap:14px}
.checks li{display:flex;gap:13px;align-items:flex-start;font-size:var(--fs-sm)}
.checks svg{width:20px;height:20px;flex:none;margin-top:3px;color:var(--indigo)}
@media (max-width:900px){.split{grid-template-columns:1fr}}

/* ---------- steps (real sequence: numbered) ----------------------------- */
.steps{margin-top:clamp(40px,5vw,64px);display:grid;gap:26px;grid-template-columns:repeat(4,1fr);counter-reset:s}
.step{position:relative;padding-top:30px;border-top:2px solid var(--line)}
.step::before{
  counter-increment:s;content:counter(s,decimal-leading-zero);
  position:absolute;top:-16px;left:0;background:var(--paper);padding-right:12px;
  font-size:var(--fs-sm);font-weight:800;color:var(--indigo);letter-spacing:.04em;
}
.band--mist .step::before{background:var(--mist)}
.step h3{font-size:var(--fs-lg)}
.step p{margin-top:12px;color:var(--ink-60);font-size:var(--fs-sm)}
@media (max-width:980px){.steps{grid-template-columns:repeat(2,1fr)}}
@media (max-width:560px){.steps{grid-template-columns:1fr}}

/* ---------- feature list (2x2) ------------------------------------------ */
.features{margin-top:clamp(40px,5vw,64px);display:grid;gap:clamp(26px,3.4vw,44px);grid-template-columns:repeat(2,1fr)}
.feature{display:flex;gap:18px}
.feature h3{font-size:var(--fs-lg)}
.feature p{margin-top:9px;color:var(--ink-60);font-size:var(--fs-sm)}
.dot{width:12px;height:12px;border-radius:999px;background:var(--indigo);flex:none;margin-top:9px}
@media (max-width:760px){.features{grid-template-columns:1fr}}

/* ---------- gallery ------------------------------------------------------ */
.gallery{margin-top:clamp(36px,4vw,56px);display:grid;gap:18px;grid-template-columns:repeat(4,1fr)}
.gallery img{border-radius:var(--radius);border:1px solid var(--line);aspect-ratio:4/3;object-fit:cover;width:100%}
@media (max-width:860px){.gallery{grid-template-columns:repeat(2,1fr)}}

/* ---------- numbers ------------------------------------------------------ */
.numbers{margin-top:clamp(40px,5vw,64px);display:grid;gap:26px;grid-template-columns:repeat(4,1fr)}
.number{border-left:3px solid var(--indigo);padding-left:20px}
.number b{display:block;font-size:clamp(2.2rem,4.4vw,3.1rem);font-weight:800;letter-spacing:-.04em;line-height:1}
.number span{display:block;margin-top:10px;color:var(--ink-60);font-size:var(--fs-sm)}
@media (max-width:760px){.numbers{grid-template-columns:repeat(2,1fr)}}

/* ---------- grid of small cards (outsourcing list) ----------------------- */
.mini{margin-top:clamp(40px,5vw,64px);display:grid;gap:16px;grid-template-columns:repeat(5,1fr)}
.mini__item{border:1px solid var(--line);border-radius:var(--radius);padding:22px 20px;background:#fff}
.mini__item h3{font-size:var(--fs-base)}
.mini__item p{margin-top:7px;font-size:var(--fs-xs);color:var(--ink-60)}
@media (max-width:1040px){.mini{grid-template-columns:repeat(3,1fr)}}
@media (max-width:680px){.mini{grid-template-columns:repeat(2,1fr)}}
@media (max-width:420px){.mini{grid-template-columns:1fr}}

/* ---------- case studies -------------------------------------------------- */
.case{display:grid;gap:clamp(28px,4.5vw,60px);grid-template-columns:.9fr 1.1fr;align-items:center;padding-block:clamp(38px,5vw,64px);border-top:1px solid var(--line)}
.case:nth-child(even) .case__media{order:2}
.case__media img{border-radius:var(--radius-lg);width:100%;aspect-ratio:4/3;object-fit:cover;border:1px solid var(--line)}
.case__brand{font-weight:700;font-size:var(--fs-lg)}
.case__sector{color:var(--indigo);font-size:var(--fs-sm);font-weight:600;margin-top:2px}
.case h3{margin-top:18px}
.case p{margin-top:14px;color:var(--ink-60);font-size:var(--fs-sm);max-width:52ch}
.stats{margin-top:24px;list-style:none;display:flex;flex-wrap:wrap;gap:10px}
.stats li{border:1px solid var(--line);border-radius:999px;padding:.42em .95em;font-size:var(--fs-xs);background:#fff}
.stats b{font-weight:700}
.stats span{color:var(--ink-40)}
@media (max-width:900px){
  .case{grid-template-columns:1fr}
  .case:nth-child(even) .case__media{order:0}
}

/* ---------- FAQ ------------------------------------------------------------ */
.faq{margin-top:clamp(36px,4vw,56px);max-width:840px}
.faq details{border-bottom:1px solid var(--line)}
.faq summary{
  display:flex;align-items:flex-start;gap:16px;cursor:pointer;list-style:none;
  padding:26px 0;font-weight:700;font-size:var(--fs-lg);letter-spacing:-.015em;
}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{
  content:"";margin-inline-start:auto;width:13px;height:13px;flex:none;margin-top:9px;
  border-right:2.5px solid var(--indigo);border-bottom:2.5px solid var(--indigo);
  transform:rotate(45deg);transition:transform .22s ease;
}
.faq details[open] summary::after{transform:rotate(225deg)}
.faq p{padding:0 0 28px;color:var(--ink-60);max-width:66ch;font-size:var(--fs-sm)}

/* ---------- closing CTA ----------------------------------------------------- */
.closer{background:var(--indigo);color:#fff;text-align:center}
.closer h2{max-width:20ch;margin-inline:auto}
.closer .btn{margin-top:32px}

/* ---------- footer ---------------------------------------------------------- */
.ftr{background:var(--ink);color:#fff;padding-block:clamp(54px,6vw,80px) 34px}
.ftr a{color:rgba(255,255,255,.72);text-decoration:none}
.ftr a:hover{color:#fff}
.ftr__grid{display:grid;gap:clamp(30px,4vw,52px);grid-template-columns:1.4fr 1fr 1fr 1fr}
.ftr__brand{display:flex;align-items:center;gap:10px;font-weight:800;font-size:1.0625rem;letter-spacing:-.03em;color:#fff;text-decoration:none}
.ftr__brand img{width:34px;height:34px}
.ftr__tag{margin-top:18px;color:rgba(255,255,255,.6);font-size:var(--fs-sm);max-width:34ch}
.ftr h4{font-size:var(--fs-sm);font-weight:700;margin:0 0 16px;color:#fff}
.ftr ul{list-style:none;display:flex;flex-direction:column;gap:11px;font-size:var(--fs-sm);color:rgba(255,255,255,.72)}
.ftr address{font-style:normal;font-size:var(--fs-sm);color:rgba(255,255,255,.72);display:flex;flex-direction:column;gap:14px}
.ftr address b{color:#fff;font-weight:600}
.ftr__bar{margin-top:clamp(40px,5vw,64px);padding-top:24px;border-top:1px solid rgba(255,255,255,.14);display:flex;flex-wrap:wrap;gap:14px 26px;align-items:center;font-size:var(--fs-xs);color:rgba(255,255,255,.55)}
.ftr__bar button{background:none;border:0;color:rgba(255,255,255,.72);font:inherit;cursor:pointer;padding:0;text-decoration:underline}
.ftr__bar button:hover{color:#fff}
@media (max-width:900px){.ftr__grid{grid-template-columns:1fr 1fr}}
@media (max-width:560px){.ftr__grid{grid-template-columns:1fr}}

/* ---------- cookie banner ------------------------------------------------------ */
.cookie{
  position:fixed;z-index:90;left:var(--gutter);right:var(--gutter);bottom:20px;
  max-width:540px;background:#fff;color:var(--ink);
  border:1px solid var(--line);border-radius:var(--radius-lg);
  box-shadow:0 26px 60px -24px rgba(20,20,48,.45);
  padding:26px 26px 22px;display:none;
}
.cookie[data-open="true"]{display:block}
.cookie h2{font-size:var(--fs-lg)}
.cookie p{margin-top:10px;font-size:var(--fs-sm);color:var(--ink-60)}
.cookie__row{margin-top:20px;display:flex;flex-wrap:wrap;gap:10px;align-items:center}
.cookie__row a{font-size:var(--fs-xs);color:var(--ink-40);margin-inline-start:auto}

/* ---------- legal / long-form text ---------------------------------------------- */
.prose{max-width:74ch}
.prose h2{font-size:var(--fs-xl);margin-top:48px}
.prose h2:first-of-type{margin-top:36px}
.prose p,.prose ul{margin-top:14px;color:var(--ink-60);font-size:var(--fs-sm)}
.prose ul{padding-inline-start:20px;list-style:disc}
.prose li{margin-top:8px}
.prose a{color:var(--indigo)}
.prose code{background:var(--mist);padding:.12em .42em;border-radius:5px;font-size:.92em}

/* ---------- 404 ------------------------------------------------------------------ */
.oops{min-height:56vh;display:flex;flex-direction:column;justify-content:center}