/* ==========================================================================
   Fast Group — Blog Rosemount / Emerson Việt Nam
   ========================================================================== */

:root{
  --navy:#0b2c4d;
  --navy-700:#123f68;
  --navy-50:#eef4fa;
  --blue:#0f6cbd;
  --blue-700:#0c569a;
  --ink:#16202b;
  --ink-2:#465667;
  --ink-3:#6b7c8f;
  --line:#dfe6ee;
  --line-2:#eef2f6;
  --bg:#ffffff;
  --bg-soft:#f5f8fb;
  --amber:#b8751a;
  --green:#1d7a52;
  --radius:10px;
  --radius-lg:16px;
  --shadow:0 1px 2px rgba(11,44,77,.06),0 8px 24px rgba(11,44,77,.07);
  --shadow-sm:0 1px 2px rgba(11,44,77,.08);
  --maxw:1180px;
  --font:"Inter","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}
body{
  margin:0;font-family:var(--font);color:var(--ink);background:var(--bg);
  font-size:17px;line-height:1.72;-webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{max-width:100%;height:auto;display:block}
a{color:var(--blue-700);text-decoration:none}
a:hover{text-decoration:underline}
.wrap{max-width:var(--maxw);width:100%;margin:0 auto;padding:0 20px}
@media(max-width:480px){.wrap{padding:0 16px}}

/* ---------- Header ---------- */
.site-header{
  position:sticky;top:0;z-index:50;background:rgba(255,255,255,.96);
  backdrop-filter:saturate(180%) blur(10px);border-bottom:1px solid var(--line);
}
.hd{display:flex;align-items:center;justify-content:space-between;gap:20px;height:66px}
.brand{display:flex;align-items:center;gap:11px;color:var(--navy);font-weight:800;letter-spacing:-.02em;font-size:18px}
.brand:hover{text-decoration:none}
.brand-mark{
  width:32px;height:32px;border-radius:8px;flex:0 0 32px;
  background:linear-gradient(135deg,var(--blue) 0%,var(--navy) 100%);
  display:grid;place-items:center;color:#fff;font-size:14px;font-weight:800;
}
.brand small{display:block;font-size:11px;font-weight:600;color:var(--ink-3);letter-spacing:.06em;text-transform:uppercase;line-height:1.2}
.nav{display:flex;align-items:center;gap:26px}
.nav a{color:var(--ink-2);font-size:15px;font-weight:600}
.nav a{display:inline-block;padding:22px 0;border-bottom:2px solid transparent}
.nav a:hover,.nav a.is-active{color:var(--navy);text-decoration:none}
.nav a.is-active{border-bottom-color:var(--blue);color:var(--navy)}
.btn{
  display:inline-flex;align-items:center;gap:8px;background:var(--blue);color:#fff;
  padding:10px 18px;border-radius:8px;font-weight:700;font-size:15px;border:0;cursor:pointer;
  transition:background .15s ease;
}
.btn:hover{background:var(--blue-700);text-decoration:none;color:#fff}
.btn-ghost{background:transparent;color:var(--navy);border:1.5px solid var(--line)}
.btn-ghost:hover{background:var(--navy-50);color:var(--navy);border-color:#c9d8e6}
@media(max-width:860px){
  .nav{display:none}
  .hd{height:60px;gap:12px}
  .brand{font-size:16px;min-width:0}
  .brand small{font-size:9.5px;letter-spacing:.04em}
  .btn{padding:9px 14px;font-size:14px;white-space:nowrap}
}
@media(max-width:400px){
  .brand small{display:none}
}

/* ---------- Hero (index) ---------- */
.hero{background:var(--navy);color:#fff;padding:60px 0 68px;position:relative;overflow:hidden}
.hero::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background:radial-gradient(1000px 420px at 88% -10%,rgba(15,108,189,.5),transparent 60%);
}
.hero .wrap{position:relative;z-index:1}
.hero .eyebrow{
  display:inline-block;font-size:12px;font-weight:700;letter-spacing:.12em;text-transform:uppercase;
  color:#8fc4f0;border:1px solid rgba(143,196,240,.35);border-radius:999px;padding:5px 14px;margin-bottom:20px;
}
.hero h1{font-size:clamp(28px,4.2vw,45px);line-height:1.18;margin:0 0 16px;letter-spacing:-.025em;font-weight:800;max-width:19ch}
.hero p{font-size:clamp(16px,1.6vw,19px);color:#c3d6e7;margin:0 0 28px;max-width:62ch;line-height:1.65}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px}
.hero .btn-ghost{color:#fff;border-color:rgba(255,255,255,.3)}
.hero .btn-ghost:hover{background:rgba(255,255,255,.1);color:#fff;border-color:rgba(255,255,255,.5)}
.hero-stats{
  display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:28px;
  margin-top:44px;padding-top:30px;border-top:1px solid rgba(255,255,255,.14);
}
@media(max-width:900px){.hero-stats{grid-template-columns:repeat(2,minmax(0,1fr));gap:24px}}
@media(max-width:480px){.hero-stats{grid-template-columns:1fr;gap:18px}}
.hero-stats div strong{display:block;font-size:clamp(19px,2.1vw,25px);font-weight:800;letter-spacing:-.02em;margin-bottom:3px}
.hero-stats div span{font-size:13.2px;color:#a9c3d9;line-height:1.5;display:block}

/* ---------- Sections ---------- */
.section{padding:56px 0}
.section-soft{background:var(--bg-soft);border-block:1px solid var(--line-2)}
.section-head{margin-bottom:28px}
.section-head h2{font-size:clamp(21px,2.4vw,27px);margin:0 0 8px;letter-spacing:-.02em;color:var(--navy);font-weight:800}
.section-head p{margin:0;color:var(--ink-2);font-size:16px;max-width:70ch}
.kicker{font-size:12px;font-weight:700;letter-spacing:.11em;text-transform:uppercase;color:var(--blue);margin:0 0 9px}

/* ---------- Cards ---------- */
.grid{display:grid;gap:26px;grid-template-columns:repeat(auto-fill,minmax(320px,1fr))}
.card{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius-lg);overflow:hidden;
  display:flex;flex-direction:column;transition:box-shadow .18s ease,transform .18s ease,border-color .18s ease;
}
.card:hover{box-shadow:var(--shadow);transform:translateY(-3px);border-color:#c9d8e6}
.card-media{aspect-ratio:16/9;background:var(--navy-50);overflow:hidden}
.card-media img{width:100%;height:100%;object-fit:cover;transition:transform .35s ease}
.card:hover .card-media img{transform:scale(1.035)}
.card-body{padding:20px 21px 22px;display:flex;flex-direction:column;flex:1}
.card h3{font-size:18.5px;line-height:1.38;margin:0 0 9px;letter-spacing:-.015em;font-weight:750}
.card h3 a{color:var(--navy)}
.card h3 a:hover{color:var(--blue);text-decoration:none}
.card p{margin:0 0 16px;color:var(--ink-2);font-size:15px;line-height:1.62;flex:1}
.card-foot{display:flex;align-items:center;justify-content:space-between;gap:12px;font-size:13.5px;color:var(--ink-3)}
.tag{
  display:inline-block;font-size:11.5px;font-weight:700;letter-spacing:.05em;text-transform:uppercase;
  padding:4px 10px;border-radius:999px;background:var(--navy-50);color:var(--navy-700);margin-bottom:12px;
}
.tag-b{background:#eaf3fb;color:var(--blue-700)}
.tag-c{background:#edf6f1;color:var(--green)}
.readmore{color:var(--blue);font-weight:700}

/* Featured */
.featured{
  display:grid;grid-template-columns:1.15fr 1fr;gap:0;background:#fff;
  border:1px solid var(--line);border-radius:var(--radius-lg);overflow:hidden;box-shadow:var(--shadow);
}
.featured-media{background:var(--navy-50);min-height:300px}
.featured-media img{width:100%;height:100%;object-fit:cover}
.featured-body{padding:34px 36px;display:flex;flex-direction:column;justify-content:center}
.featured-body h3{font-size:clamp(21px,2.6vw,28px);line-height:1.3;margin:0 0 12px;letter-spacing:-.022em;color:var(--navy);font-weight:800}
.featured-body h3 a{color:inherit}
.featured-body p{color:var(--ink-2);margin:0 0 20px;font-size:16.5px}
@media(max-width:820px){
  .featured{grid-template-columns:1fr}
  .featured-media{aspect-ratio:16/9;min-height:0}
  .featured-body{padding:26px 22px}
}

/* ---------- Article ---------- */
.crumbs{font-size:13.5px;color:var(--ink-3);padding:18px 0 0}
.crumbs a{color:var(--ink-3)}
.crumbs a:hover{color:var(--blue)}
.crumbs span{margin:0 7px;opacity:.5}

.post-head{padding:12px 0 26px;max-width:820px}
.post-head h1{font-size:clamp(27px,3.7vw,40px);line-height:1.22;letter-spacing:-.028em;margin:12px 0 16px;color:var(--navy);font-weight:800}
.post-meta{display:flex;flex-wrap:wrap;align-items:center;gap:8px 16px;font-size:14px;color:var(--ink-3)}
.post-meta .dot{opacity:.45}
.post-hero{border-radius:var(--radius-lg);overflow:hidden;border:1px solid var(--line);margin-bottom:12px}
.post-hero img{width:100%;aspect-ratio:16/9;object-fit:cover}
.figcap{font-size:13.5px;color:var(--ink-3);margin:0 0 34px;text-align:center}

.post-layout{display:grid;grid-template-columns:minmax(0,1fr) 296px;gap:54px;align-items:start;padding-bottom:20px}
@media(max-width:1000px){.post-layout{grid-template-columns:minmax(0,1fr);gap:0}}

/* Prose */
.prose{max-width:74ch;min-width:0;font-size:17.2px;overflow-wrap:break-word}
.prose > p:first-of-type{font-size:18.6px;color:var(--ink-2);line-height:1.66}
.prose h2{
  font-size:clamp(21px,2.3vw,26px);line-height:1.3;margin:2.1em 0 .6em;letter-spacing:-.02em;
  color:var(--navy);font-weight:800;scroll-margin-top:86px;
}
.prose h2::before{
  content:"";display:block;width:42px;height:3px;background:var(--blue);border-radius:2px;margin-bottom:14px;
}
.prose h3{font-size:19px;margin:1.7em 0 .5em;color:var(--navy-700);letter-spacing:-.012em;font-weight:750;scroll-margin-top:86px}
.prose p{margin:0 0 1.15em}
.prose ul,.prose ol{margin:0 0 1.25em;padding-left:1.35em}
.prose li{margin-bottom:.5em}
.prose li::marker{color:var(--blue)}
.prose strong{font-weight:700;color:var(--ink)}
.prose em{color:var(--ink-2)}
.prose a{color:var(--blue-700);text-decoration:underline;text-decoration-color:rgba(15,108,189,.32);text-underline-offset:3px;font-weight:550}
.prose a:hover{color:var(--blue);text-decoration-color:var(--blue)}
.prose hr{border:0;border-top:1px solid var(--line);margin:2.4em 0}
.prose blockquote{margin:1.5em 0;padding:2px 0 2px 20px;border-left:3px solid var(--blue);color:var(--ink-2)}

/* Ảnh minh hoạ trong bài */
.prose figure.fig{
  margin:2em 0;padding:20px 20px 16px;background:var(--bg-soft);
  border:1px solid var(--line-2);border-radius:var(--radius-lg);text-align:center;
}
.prose figure.fig img{
  max-width:100%;width:auto;max-height:430px;margin:0 auto;border-radius:6px;
}
.prose figure.fig figcaption{
  margin-top:14px;font-size:14.3px;line-height:1.6;color:var(--ink-2);
  text-align:left;max-width:64ch;margin-inline:auto;
}
.prose figure.fig .fig-src{
  display:block;margin-top:6px;font-size:12.2px;color:var(--ink-3);font-style:italic;
}
@media(max-width:600px){
  .prose figure.fig{padding:14px 14px 12px;margin:1.6em 0}
  .prose figure.fig img{max-height:320px}
  .prose figure.fig figcaption{font-size:13.6px}
}

/* Tables */
.table-wrap{overflow-x:auto;margin:1.7em 0;border:1px solid var(--line);border-radius:var(--radius);background:#fff;-webkit-overflow-scrolling:touch}
.prose table{border-collapse:collapse;width:100%;font-size:14.8px;line-height:1.55;min-width:560px}
.prose thead th{
  background:var(--navy);color:#fff;text-align:left;font-weight:700;padding:12px 14px;
  font-size:13.5px;letter-spacing:.01em;vertical-align:bottom;white-space:nowrap;
}
.prose tbody td{padding:11px 14px;border-top:1px solid var(--line-2);vertical-align:top;color:var(--ink-2)}
.prose tbody tr:nth-child(even){background:#fafcfe}
.prose tbody td:first-child{color:var(--ink);font-weight:600}
.prose tbody td strong{color:var(--navy)}

/* Code / RFQ template */
.prose pre{
  background:var(--navy);color:#dbe9f6;border-radius:var(--radius);padding:20px 22px;overflow-x:auto;
  font-size:13.6px;line-height:1.66;margin:1.7em 0;
  font-family:"SFMono-Regular",Consolas,"Liberation Mono",Menlo,monospace;
}
.prose pre code{background:none;padding:0;color:inherit;font-size:inherit}
.prose code{background:var(--navy-50);color:var(--navy-700);padding:2px 6px;border-radius:5px;font-size:.9em}

/* TOC sidebar */
.side{position:sticky;top:86px}
@media(max-width:1000px){
  .side{position:static;margin:0 0 34px}
}
.toc{border:1px solid var(--line);border-radius:var(--radius-lg);padding:20px 20px 18px;background:var(--bg-soft)}
.toc h4{margin:0 0 12px;font-size:12px;letter-spacing:.11em;text-transform:uppercase;color:var(--ink-3);font-weight:700}
.toc ol{list-style:none;margin:0;padding:0;counter-reset:toc}
.toc li{counter-increment:toc;margin-bottom:9px;line-height:1.45}
.toc a{color:var(--ink-2);font-size:14.3px;display:flex;gap:9px}
.toc a::before{content:counter(toc,decimal-leading-zero);color:var(--blue);font-weight:700;font-size:12px;padding-top:2px;flex:0 0 auto}
.toc a:hover{color:var(--blue);text-decoration:none}

.side-cta{
  margin-top:20px;border:1px solid var(--line);border-radius:var(--radius-lg);padding:22px 20px;
  background:linear-gradient(160deg,var(--navy) 0%,var(--navy-700) 100%);color:#fff;
}
.side-cta h4{margin:0 0 8px;font-size:17px;font-weight:750;letter-spacing:-.012em}
.side-cta p{margin:0 0 15px;font-size:14.3px;color:#bed3e6;line-height:1.6}
.side-cta .btn{width:100%;justify-content:center}

/* CTA box in flow */
.cta-box{
  margin:2.6em 0 1em;border-radius:var(--radius-lg);padding:30px 32px;
  background:linear-gradient(160deg,var(--navy) 0%,#164a78 100%);color:#fff;
}
.cta-box h3{margin:0 0 10px;font-size:21px;color:#fff;letter-spacing:-.015em;font-weight:750}
.cta-box p{margin:0 0 18px;color:#c6daea;font-size:15.6px}
.cta-box .btn{background:#fff;color:var(--navy)}
.cta-box .btn:hover{background:#e8f1f9;color:var(--navy)}
.cta-meta{margin-top:18px;padding-top:16px;border-top:1px solid rgba(255,255,255,.16);font-size:13.6px;color:#a9c3d9;line-height:1.7}
.cta-meta strong{color:#fff;font-weight:650}

/* FAQ */
.faq{margin:2.6em 0 0}
.faq h2{margin-bottom:.8em}
details.qa{border:1px solid var(--line);border-radius:var(--radius);margin-bottom:10px;background:#fff;overflow:hidden}
details.qa[open]{border-color:#c9d8e6;box-shadow:var(--shadow-sm)}
details.qa summary{
  cursor:pointer;list-style:none;padding:15px 48px 15px 18px;font-weight:650;color:var(--navy);
  position:relative;font-size:16.2px;line-height:1.5;
}
details.qa summary::-webkit-details-marker{display:none}
details.qa summary::after{
  content:"";position:absolute;right:19px;top:22px;width:9px;height:9px;
  border-right:2px solid var(--blue);border-bottom:2px solid var(--blue);
  transform:rotate(45deg);transition:transform .2s ease;
}
details.qa[open] summary::after{transform:rotate(-135deg);top:25px}
details.qa summary:hover{background:var(--bg-soft)}
details.qa .qa-body{padding:0 18px 17px;color:var(--ink-2);font-size:16px;line-height:1.68}
details.qa .qa-body p{margin:0}
details.qa .qa-body a{color:var(--blue-700);text-decoration:underline;text-underline-offset:3px}

/* Related strip inside prose */
.ref-strip{
  margin:2em 0;padding:18px 20px;background:var(--bg-soft);border:1px solid var(--line-2);
  border-radius:var(--radius);font-size:15px;color:var(--ink-2);
}
.ref-strip strong{color:var(--navy);display:block;margin-bottom:7px;font-size:13px;letter-spacing:.06em;text-transform:uppercase}
.ref-strip a{margin-right:4px}

/* Prev / next */
.pagenav{display:grid;grid-template-columns:1fr 1fr;gap:18px;margin:44px 0 0;padding-top:30px;border-top:1px solid var(--line)}
@media(max-width:700px){.pagenav{grid-template-columns:1fr}}
.pagenav a{
  border:1px solid var(--line);border-radius:var(--radius);padding:16px 18px;display:block;
  transition:border-color .15s ease,background .15s ease;
}
.pagenav a:hover{border-color:#c9d8e6;background:var(--bg-soft);text-decoration:none}
.pagenav span{display:block;font-size:11.5px;letter-spacing:.09em;text-transform:uppercase;color:var(--ink-3);font-weight:700;margin-bottom:6px}
.pagenav strong{display:block;color:var(--navy);font-size:15.6px;line-height:1.42;font-weight:650}
.pagenav .next{text-align:right}

/* ---------- Footer ---------- */
.site-footer{background:var(--navy);color:#b9cfe1;margin-top:64px;padding:52px 0 30px;font-size:14.8px}
.foot-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr;gap:40px}
@media(max-width:860px){.foot-grid{grid-template-columns:1fr;gap:30px}}
.site-footer h5{color:#fff;font-size:12.5px;letter-spacing:.1em;text-transform:uppercase;margin:0 0 14px;font-weight:700}
.site-footer a{color:#b9cfe1}
.site-footer a:hover{color:#fff}
.site-footer ul{list-style:none;margin:0;padding:0}
.site-footer li{margin-bottom:9px;line-height:1.5}
.foot-brand{display:flex;align-items:center;gap:11px;color:#fff;font-weight:800;font-size:18px;margin-bottom:14px}
.foot-brand .brand-mark{background:rgba(255,255,255,.14)}
.foot-addr{line-height:1.8;margin:0 0 6px}
.foot-addr strong{color:#fff;font-weight:650}
.foot-bottom{
  margin-top:38px;padding-top:20px;border-top:1px solid rgba(255,255,255,.12);
  display:flex;flex-wrap:wrap;gap:10px 22px;justify-content:space-between;font-size:13.4px;color:#8fa9bf;
}
.foot-note{font-size:12.8px;color:#7f9ab1;line-height:1.65;margin:14px 0 0;max-width:62ch}

/* utils */
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}
@media print{.site-header,.side,.pagenav,.site-footer,.cta-box{display:none}.post-layout{grid-template-columns:1fr}}