/* ============ XÂY DỰNG CÔNG NGHIỆP — MONA Template ============ */
:root{
  --accent:#F5A300;        /* vàng an toàn công nghiệp */
  --accent-dark:#D98A00;
  --ink:#15171C;           /* than chì */
  --steel:#23272F;
  --steel-2:#2D323C;
  --muted:#7A828E;
  --line:#E4E7EC;
  --bg:#FFFFFF;
  --surface:#F5F6F8;
  --surface-2:#EEF0F3;
  --white:#FFFFFF;
  --radius:14px;
  --radius-sm:8px;
  --maxw:1200px;
  --topbar-h:46px;
  --shadow-sm:0 2px 10px rgba(20,23,28,.06);
  --shadow:0 14px 40px rgba(20,23,28,.12);
  --ease:.25s ease;
  --font-display:'Oswald',sans-serif;
  --font-body:'Be Vietnam Pro',sans-serif;
}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{font-size:16px;scroll-behavior:smooth;-webkit-font-smoothing:antialiased}
body{font-family:var(--font-body);color:var(--ink);background:var(--bg);line-height:1.65;overflow-x:hidden}
img{max-width:100%;height:auto;display:block}
a{color:inherit;text-decoration:none}
h1,h2,h3,h4{font-family:var(--font-display);font-weight:700;line-height:1.12;text-transform:uppercase;letter-spacing:.01em}
h1{font-size:clamp(2.1rem,5vw,3.6rem)}
h2{font-size:clamp(1.7rem,3.6vw,2.7rem)}
h3{font-size:clamp(1.15rem,2vw,1.5rem)}
p{max-width:68ch}
.container{width:100%;max-width:var(--maxw);margin-inline:auto;padding-inline:20px}
.section{padding:84px 0}
.section--tight{padding:60px 0}
.bg-surface{background:var(--surface)}
.bg-ink{background:var(--ink);color:#EAECEF}
.text-center{text-align:center}

/* ---- Eyebrow + heading ---- */
.eyebrow{display:inline-flex;align-items:center;gap:9px;font-family:var(--font-display);
  font-weight:600;text-transform:uppercase;letter-spacing:.14em;font-size:.82rem;color:var(--accent-dark)}
.eyebrow::before{content:"";width:26px;height:3px;background:var(--accent);display:inline-block}
.bg-ink .eyebrow{color:var(--accent)}
.section-head{max-width:720px;margin-bottom:46px}
.section-head.text-center{margin-inline:auto}
.section-head p{color:var(--muted);margin-top:14px}
.bg-ink .section-head p{color:#AEB4BD}

/* ---- Buttons ---- */
.btn{display:inline-flex;align-items:center;gap:9px;padding:14px 28px;font-family:var(--font-display);
  font-weight:600;text-transform:uppercase;letter-spacing:.05em;font-size:.92rem;border:2px solid transparent;
  border-radius:var(--radius-sm);cursor:pointer;transition:var(--ease);min-height:48px}
.btn--gold{background:var(--accent);color:var(--ink)}
.btn--gold:hover{background:var(--ink);color:#fff;transform:translateY(-2px)}
.btn--ink{background:var(--ink);color:#fff}
.btn--ink:hover{background:var(--accent);color:var(--ink);transform:translateY(-2px)}
.btn--ghost{background:transparent;border-color:currentColor}
.btn--ghost:hover{background:var(--accent);border-color:var(--accent);color:var(--ink)}
.btn--block{width:100%;justify-content:center}

/* ---- Topbar (LUẬT 4) ---- */
.topbar{position:fixed;top:0;left:0;right:0;height:var(--topbar-h);z-index:1100;
  background:repeating-linear-gradient(45deg,#15171C,#15171C 16px,#1d2025 16px,#1d2025 32px);
  color:#fff;display:flex;align-items:center;justify-content:center;gap:16px;padding:0 16px;font-size:.86rem}
.topbar strong{font-weight:600;letter-spacing:.02em}
.topbar__cta{display:inline-flex;align-items:center;gap:7px;background:var(--accent);color:var(--ink);
  padding:7px 18px;border-radius:50px;font-family:var(--font-display);font-weight:600;font-size:.8rem;
  text-transform:uppercase;letter-spacing:.04em;transition:var(--ease)}
.topbar__cta:hover{background:#fff}
@media(max-width:680px){.topbar{font-size:.72rem;gap:9px;text-align:center}.topbar .hide-sm{display:none}}

/* ---- Header ---- */
.header{position:sticky;top:var(--topbar-h);z-index:1000;background:rgba(255,255,255,.96);
  backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
.header__inner{display:flex;align-items:center;justify-content:space-between;gap:24px;height:74px}
.brand{display:flex;align-items:center;gap:11px;font-family:var(--font-display);font-weight:700;
  font-size:1.35rem;text-transform:uppercase;letter-spacing:.02em}
.brand__mark{width:40px;height:40px;border-radius:9px;background:var(--accent);color:var(--ink);
  display:grid;place-items:center;font-size:1.25rem;font-weight:700}
.brand span{color:var(--accent-dark)}
.nav__menu{display:flex;align-items:center;gap:30px;list-style:none}
.nav__menu a{font-family:var(--font-display);font-weight:500;text-transform:uppercase;letter-spacing:.04em;
  font-size:.92rem;padding:6px 0;position:relative;transition:var(--ease)}
.nav__menu a::after{content:"";position:absolute;left:0;bottom:-2px;width:0;height:2px;background:var(--accent);transition:var(--ease)}
.nav__menu a:hover,.nav__menu a.active{color:var(--accent-dark)}
.nav__menu a:hover::after,.nav__menu a.active::after{width:100%}
.header__cta{display:flex;align-items:center;gap:14px}
.header__phone{display:flex;align-items:center;gap:9px;font-family:var(--font-display);font-weight:600}
.header__phone small{display:block;font-family:var(--font-body);font-weight:400;font-size:.72rem;color:var(--muted);text-transform:none}
.nav__toggle{display:none;flex-direction:column;gap:5px;background:none;border:0;cursor:pointer;padding:8px}
.nav__toggle span{width:26px;height:3px;background:var(--ink);border-radius:3px;transition:var(--ease)}

@media(max-width:980px){
  .nav__menu{position:fixed;inset:calc(var(--topbar-h) + 74px) 0 auto 0;flex-direction:column;align-items:flex-start;
    background:var(--bg);padding:24px;gap:6px;border-bottom:1px solid var(--line);box-shadow:var(--shadow);
    transform:translateY(-140%);transition:transform .35s ease;z-index:999}
  .nav__menu.open{transform:translateY(0)}
  .nav__menu a{width:100%;padding:12px 0;border-bottom:1px solid var(--line);font-size:1.05rem}
  .nav__toggle{display:flex}
  .header__phone{display:none}
  .header__cta{display:none}
}

/* ---- Hero ---- */
.hero{position:relative;color:#fff;padding:120px 0 110px;background:var(--ink);overflow:hidden}
.hero__bg{position:absolute;inset:0;object-fit:cover;width:100%;height:100%;opacity:.34}
.hero::after{content:"";position:absolute;inset:0;background:linear-gradient(90deg,rgba(15,17,22,.92) 0%,rgba(15,17,22,.55) 60%,rgba(15,17,22,.3) 100%)}
.hero__inner{position:relative;z-index:2;max-width:760px}
.hero h1{margin:18px 0 20px}
.hero h1 em{color:var(--accent);font-style:normal}
.hero p{font-size:1.12rem;color:#D6D9DE;margin-bottom:32px}
.hero__actions{display:flex;flex-wrap:wrap;gap:14px}
.hero__strip{position:relative;z-index:2;margin-top:64px;display:grid;grid-template-columns:repeat(4,1fr);gap:1px;
  background:rgba(255,255,255,.12);border:1px solid rgba(255,255,255,.12);border-radius:var(--radius);overflow:hidden}
.hero__stat{background:rgba(15,17,22,.6);padding:26px 22px;text-align:center}
.hero__stat b{font-family:var(--font-display);font-size:2.3rem;color:var(--accent);display:block;line-height:1}
.hero__stat span{font-size:.86rem;color:#C4C8CE;margin-top:6px;display:block}
@media(max-width:760px){.hero__strip{grid-template-columns:repeat(2,1fr)}}

/* ---- Services ---- */
.cards{display:grid;grid-template-columns:repeat(auto-fill,minmax(290px,1fr));gap:24px}
.svc{background:var(--bg);border:1px solid var(--line);border-radius:var(--radius);padding:32px 28px;
  transition:var(--ease);position:relative;overflow:hidden}
.svc::before{content:"";position:absolute;left:0;top:0;width:4px;height:0;background:var(--accent);transition:var(--ease)}
.svc:hover{box-shadow:var(--shadow);transform:translateY(-4px)}
.svc:hover::before{height:100%}
.svc__num{font-family:var(--font-display);font-size:.85rem;color:var(--muted);letter-spacing:.1em}
.svc__icon{width:64px;height:64px;border-radius:13px;background:var(--surface-2);color:var(--accent-dark);
  display:grid;place-items:center;margin:14px 0 18px;transition:var(--ease)}
.svc:hover .svc__icon{background:var(--accent);color:var(--ink)}
.svc__icon svg{width:32px;height:32px}
.svc h3{margin-bottom:10px}
.svc p{color:var(--muted);font-size:.96rem;margin-bottom:16px}
.svc__link{font-family:var(--font-display);font-weight:600;text-transform:uppercase;font-size:.85rem;
  letter-spacing:.05em;color:var(--accent-dark);display:inline-flex;gap:7px;align-items:center}
.svc__link:hover{gap:12px}

/* ---- About / split ---- */
.split{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center}
@media(max-width:880px){.split{grid-template-columns:1fr;gap:36px}}
.split__media{position:relative}
.split__media img{border-radius:var(--radius);width:100%;object-fit:cover}
.split__badge{position:absolute;right:-14px;bottom:-14px;background:var(--accent);color:var(--ink);
  padding:22px 26px;border-radius:var(--radius);box-shadow:var(--shadow)}
.split__badge b{font-family:var(--font-display);font-size:2.4rem;display:block;line-height:1}
.split__badge span{font-size:.82rem;font-weight:600}
.checklist{list-style:none;margin:22px 0;display:grid;gap:13px}
.checklist li{display:flex;gap:12px;align-items:flex-start;color:#3A4049}
.checklist li::before{content:"✓";flex:none;width:24px;height:24px;border-radius:6px;background:var(--accent);
  color:var(--ink);display:grid;place-items:center;font-weight:700;font-size:.85rem}
.lead{color:var(--muted);margin-bottom:8px}

/* ---- Process ---- */
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;counter-reset:step}
@media(max-width:880px){.steps{grid-template-columns:repeat(2,1fr)}}
@media(max-width:520px){.steps{grid-template-columns:1fr}}
.step{position:relative;padding:30px 24px;background:var(--bg);border:1px solid var(--line);border-radius:var(--radius)}
.step__n{font-family:var(--font-display);font-size:3rem;color:var(--surface-2);line-height:.8;
  position:absolute;right:18px;top:14px;font-weight:700}
.bg-ink .step{background:var(--steel);border-color:rgba(255,255,255,.08)}
.bg-ink .step__n{color:rgba(255,255,255,.08)}
.step h3{margin:6px 0 8px;position:relative}
.step p{color:var(--muted);font-size:.93rem}
.bg-ink .step p{color:#AEB4BD}

/* ---- Projects ---- */
.projects{display:grid;grid-template-columns:repeat(2,1fr);gap:22px}
@media(max-width:760px){.projects{grid-template-columns:1fr}}
.project{position:relative;border-radius:var(--radius);overflow:hidden;aspect-ratio:4/3}
.project img{width:100%;height:100%;object-fit:cover;transition:transform .5s ease}
.project:hover img{transform:scale(1.06)}
.project__cap{position:absolute;inset:auto 0 0 0;padding:28px 24px 22px;color:#fff;
  background:linear-gradient(transparent,rgba(15,17,22,.9))}
.project__cap small{color:var(--accent);font-family:var(--font-display);text-transform:uppercase;letter-spacing:.08em;font-size:.8rem}
.project__cap h3{margin-top:4px}

/* ---- Counter band ---- */
.counters{display:grid;grid-template-columns:repeat(4,1fr);gap:30px;text-align:center}
@media(max-width:760px){.counters{grid-template-columns:repeat(2,1fr);gap:36px}}
.counter b{font-family:var(--font-display);font-size:clamp(2.4rem,5vw,3.4rem);color:var(--accent);display:block;line-height:1}
.counter span{color:#C4C8CE;font-size:.95rem;margin-top:8px;display:block}

/* ---- Pricing ---- */
.pricing{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;align-items:stretch}
@media(max-width:880px){.pricing{grid-template-columns:1fr;max-width:440px;margin-inline:auto}}
.plan{background:var(--bg);border:1px solid var(--line);border-radius:var(--radius);padding:34px 30px;
  display:flex;flex-direction:column;transition:var(--ease)}
.plan--featured{border-color:var(--accent);box-shadow:var(--shadow);position:relative}
.plan--featured::after{content:"Phổ biến";position:absolute;top:18px;right:18px;background:var(--accent);color:var(--ink);
  font-family:var(--font-display);font-size:.72rem;text-transform:uppercase;letter-spacing:.06em;padding:5px 12px;border-radius:50px}
.plan h3{font-size:1.25rem}
.plan__price{font-family:var(--font-display);font-size:2.6rem;color:var(--ink);margin:14px 0 4px;line-height:1}
.plan__price small{font-size:.95rem;color:var(--muted);font-family:var(--font-body)}
.plan__desc{color:var(--muted);font-size:.92rem;margin-bottom:18px;min-height:42px}
.plan ul{list-style:none;display:grid;gap:11px;margin-bottom:26px}
.plan li{display:flex;gap:10px;font-size:.94rem;color:#3A4049}
.plan li::before{content:"✓";color:var(--accent-dark);font-weight:700}
.plan .btn{margin-top:auto}

/* ---- Testimonials ---- */
.quotes{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
@media(max-width:880px){.quotes{grid-template-columns:1fr}}
.quote{background:var(--bg);border:1px solid var(--line);border-radius:var(--radius);padding:30px 28px}
.quote__stars{color:var(--accent);letter-spacing:2px;margin-bottom:12px}
.quote p{color:#3A4049;font-style:italic;margin-bottom:20px}
.quote__who{display:flex;align-items:center;gap:13px}
.quote__av{width:46px;height:46px;border-radius:50%;background:var(--ink);color:var(--accent);
  display:grid;place-items:center;font-family:var(--font-display);font-weight:700}
.quote__who b{display:block;font-size:.96rem}
.quote__who span{font-size:.82rem;color:var(--muted)}

/* ---- Team ---- */
.team{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
@media(max-width:760px){.team{grid-template-columns:1fr;max-width:380px;margin-inline:auto}}
.member{border-radius:var(--radius);overflow:hidden;background:var(--bg);border:1px solid var(--line);transition:var(--ease)}
.member:hover{box-shadow:var(--shadow);transform:translateY(-4px)}
.member__img{aspect-ratio:1/1;overflow:hidden}
.member__img img{width:100%;height:100%;object-fit:cover;transition:transform .5s ease}
.member:hover .member__img img{transform:scale(1.05)}
.member__body{padding:20px 22px}
.member__body b{font-family:var(--font-display);font-size:1.15rem;text-transform:uppercase}
.member__body span{color:var(--accent-dark);font-size:.9rem;font-weight:600;display:block;margin-top:2px}

/* ---- FAQ ---- */
.faq{max-width:820px;margin-inline:auto;display:grid;gap:14px}
.faq__item{border:1px solid var(--line);border-radius:var(--radius-sm);background:var(--bg);overflow:hidden}
.faq__q{width:100%;display:flex;justify-content:space-between;align-items:center;gap:16px;
  padding:20px 24px;background:none;border:0;cursor:pointer;font-family:var(--font-display);font-weight:600;
  text-transform:uppercase;letter-spacing:.02em;font-size:1rem;text-align:left;color:var(--ink)}
.faq__q::after{content:"+";font-size:1.5rem;color:var(--accent-dark);transition:var(--ease);flex:none}
.faq__item.open .faq__q::after{transform:rotate(45deg)}
.faq__a{max-height:0;overflow:hidden;transition:max-height .35s ease}
.faq__a p{padding:0 24px 22px;color:var(--muted)}

/* ---- CTA band ---- */
.cta-band{background:var(--accent);border-radius:var(--radius);padding:50px;display:flex;
  align-items:center;justify-content:space-between;gap:30px;flex-wrap:wrap}
.cta-band h2{color:var(--ink);max-width:600px}
.cta-band p{color:#3a2f12;margin-top:8px}

/* ---- Quote form ---- */
.quote-form{background:var(--steel);border-radius:var(--radius);padding:40px;color:#fff}
.quote-form .field{margin-bottom:16px}
.quote-form label{display:block;font-size:.85rem;margin-bottom:7px;color:#C4C8CE}
.quote-form input,.quote-form select,.quote-form textarea{width:100%;padding:13px 15px;border-radius:var(--radius-sm);
  border:1.5px solid rgba(255,255,255,.16);background:rgba(255,255,255,.05);color:#fff;font-family:var(--font-body);font-size:.95rem}
.quote-form input::placeholder,.quote-form textarea::placeholder{color:#8A919B}
.quote-form input:focus,.quote-form select:focus,.quote-form textarea:focus{outline:none;border-color:var(--accent)}
.quote-form .row{display:grid;grid-template-columns:1fr 1fr;gap:16px}
@media(max-width:560px){.quote-form .row{grid-template-columns:1fr}}

/* ---- Page hero (sub pages) ---- */
.page-hero{position:relative;background:var(--ink);color:#fff;padding:80px 0;text-align:center;overflow:hidden}
.page-hero::before{content:"";position:absolute;inset:0;
  background:repeating-linear-gradient(45deg,transparent,transparent 22px,rgba(245,163,0,.05) 22px,rgba(245,163,0,.05) 44px)}
.page-hero h1{position:relative}
.page-hero .crumb{position:relative;margin-top:14px;color:#AEB4BD;font-size:.92rem}
.page-hero .crumb a:hover{color:var(--accent)}
.page-hero .crumb span{color:var(--accent)}

/* ---- Feature mini ---- */
.feature-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
@media(max-width:760px){.feature-grid{grid-template-columns:1fr}}
.feature{display:flex;gap:16px;align-items:flex-start;padding:24px;background:var(--bg);border:1px solid var(--line);border-radius:var(--radius)}
.feature__ic{flex:none;width:52px;height:52px;border-radius:11px;background:var(--surface-2);color:var(--accent-dark);display:grid;place-items:center}
.feature__ic svg{width:26px;height:26px}
.feature h3{font-size:1.1rem;margin-bottom:6px}
.feature p{color:var(--muted);font-size:.92rem}

/* ---- Footer ---- */
.footer{background:var(--ink);color:#AEB4BD;padding:70px 0 0}
.footer__grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.4fr;gap:40px;padding-bottom:50px}
@media(max-width:880px){.footer__grid{grid-template-columns:1fr 1fr}}
@media(max-width:520px){.footer__grid{grid-template-columns:1fr}}
.footer .brand{color:#fff;margin-bottom:16px}
.footer__col h4{color:#fff;font-size:1rem;margin-bottom:18px;text-transform:uppercase}
.footer__col ul{list-style:none;display:grid;gap:11px}
.footer__col a:hover{color:var(--accent)}
.footer__col p{font-size:.94rem;margin-bottom:14px}
.footer__contact li{display:flex;gap:11px;margin-bottom:13px;font-size:.94rem}
.footer__contact b{color:var(--accent)}
.footer__bottom{border-top:1px solid rgba(255,255,255,.1);padding:22px 0;display:flex;
  justify-content:space-between;gap:14px;flex-wrap:wrap;font-size:.86rem}
.footer__bottom a{color:var(--accent)}

/* ---- Reveal animation (with safe fallback) ---- */
.reveal{opacity:0;transform:translateY(28px);transition:opacity .6s ease,transform .6s ease}
.reveal.in{opacity:1;transform:none}
@media(prefers-reduced-motion:reduce){.reveal{opacity:1!important;transform:none!important;transition:none}}

.mt-0{margin-top:0}.mb-0{margin-bottom:0}