/* ============================================================
   PEC.SG — PE Consultants Pte Ltd
   Premium engineering design system
   Palette: deep navy / graphite / steel / white / engineering cyan
   ============================================================ */
:root{
  --ink:#0B1830;
  --navy:#12294F;
  --navy-2:#0E2140;
  --graphite:#333A45;
  --steel:#64748B;
  --steel-lt:#94A3B8;
  --line:#E3E9F1;
  --paper:#F6F8FB;
  --white:#FFFFFF;
  --cyan:#1FA9E0;
  --cyan-dk:#1580AF;
  --wa:#25D366;
  --max:1160px;
  --radius:10px;
  --font:"Archivo",system-ui,-apple-system,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
  --mono:"IBM Plex Mono","SFMono-Regular",Consolas,Menlo,monospace;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{animation:none!important;transition:none!important}
}
body{
  font-family:var(--font);
  color:var(--graphite);
  background:var(--white);
  line-height:1.65;
  font-size:16.5px;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;height:auto;display:block}
a{color:var(--cyan-dk);text-decoration:none}
a:hover{text-decoration:underline}
a:focus-visible,button:focus-visible,summary:focus-visible{outline:2px solid var(--cyan);outline-offset:2px}
.wrap{max-width:var(--max);margin:0 auto;padding:0 22px}

/* ---------- Skip link ---------- */
.skip{position:absolute;left:-9999px;top:0;background:var(--ink);color:#fff;padding:.6rem 1rem;z-index:200}
.skip:focus{left:0}

/* ---------- Header ---------- */
.site-header{
  position:sticky;top:0;z-index:100;
  background:rgba(11,24,48,.97);
  backdrop-filter:saturate(140%) blur(6px);
  border-bottom:1px solid rgba(255,255,255,.08);
}
.nav{display:flex;align-items:center;gap:1rem;height:66px}
.brand{display:flex;align-items:center;gap:.65rem;color:#fff;font-weight:700;font-size:1.12rem;letter-spacing:.01em}
.brand:hover{text-decoration:none}
.brand img{width:34px;height:34px;background:#fff;border-radius:6px;padding:2px}
.brand small{display:block;font-family:var(--mono);font-weight:400;font-size:.6rem;letter-spacing:.14em;color:var(--steel-lt);text-transform:uppercase}
.nav-links{display:flex;align-items:center;gap:.15rem;margin-left:auto;list-style:none}
.nav-links a{color:#D5DEEA;font-size:.86rem;font-weight:500;padding:.5rem .68rem;border-radius:6px;white-space:nowrap}
.nav-links a:hover{color:#fff;background:rgba(255,255,255,.07);text-decoration:none}
.nav-links a[aria-current="page"]{color:var(--cyan)}
.nav-cta{background:var(--cyan);color:#06263B!important;font-weight:700!important;margin-left:.4rem}
.nav-cta:hover{background:#3FBCEC!important}
.nav-toggle{display:none;margin-left:auto;background:none;border:1px solid rgba(255,255,255,.25);color:#fff;border-radius:6px;padding:.45rem .6rem;font-size:1.05rem;cursor:pointer}
.dropdown{position:relative}
.dropdown>a::after{content:" ▾";font-size:.7em}
.dropdown-menu{
  display:none;position:absolute;top:100%;left:0;min-width:300px;
  background:#fff;border:1px solid var(--line);border-radius:8px;
  box-shadow:0 14px 38px rgba(11,24,48,.18);padding:.5rem;list-style:none;
}
.dropdown:hover .dropdown-menu,.dropdown:focus-within .dropdown-menu{display:block}
.dropdown-menu a{display:block;color:var(--graphite);padding:.55rem .7rem;font-size:.86rem;border-radius:6px}
.dropdown-menu a:hover{background:var(--paper);color:var(--ink)}

@media (max-width:960px){
  .nav-toggle{display:block}
  .nav-links{
    display:none;position:absolute;top:66px;left:0;right:0;
    flex-direction:column;align-items:stretch;gap:0;
    background:var(--ink);padding:.6rem 1rem 1rem;border-bottom:1px solid rgba(255,255,255,.1);
    max-height:calc(100vh - 66px);overflow-y:auto;
  }
  .nav-links.open{display:flex}
  .nav-links a{padding:.75rem .5rem;font-size:.95rem}
  .dropdown-menu{display:block;position:static;background:none;border:none;box-shadow:none;padding:0 0 0 .9rem;min-width:0}
  .dropdown-menu a{color:#AFC0D5}
  .dropdown>a::after{content:""}
  .nav-cta{text-align:center;margin:.5rem 0 0}
}

/* ---------- Hero ---------- */
.hero{
  position:relative;color:#fff;overflow:hidden;
  background:linear-gradient(140deg,var(--ink) 0%,var(--navy) 58%,#123A63 100%);
}
.hero::before{ /* engineering drawing grid — signature motif */
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:
    linear-gradient(rgba(255,255,255,.045) 1px,transparent 1px),
    linear-gradient(90deg,rgba(255,255,255,.045) 1px,transparent 1px),
    linear-gradient(rgba(255,255,255,.02) 1px,transparent 1px),
    linear-gradient(90deg,rgba(255,255,255,.02) 1px,transparent 1px);
  background-size:120px 120px,120px 120px,24px 24px,24px 24px;
}
.hero .wrap{position:relative;padding-top:4.4rem;padding-bottom:4.4rem}
.hero.hero-sub .wrap{padding-top:3.1rem;padding-bottom:3.1rem}
.eyebrow{
  font-family:var(--mono);font-size:.72rem;letter-spacing:.18em;text-transform:uppercase;
  color:var(--cyan);display:inline-flex;align-items:center;gap:.6rem;margin-bottom:1rem;
}
.eyebrow::before{content:"";width:26px;height:1px;background:var(--cyan)}
.hero h1{font-size:clamp(1.85rem,4.4vw,3rem);line-height:1.14;font-weight:700;letter-spacing:-.015em;max-width:820px}
.hero .lede{margin-top:1.1rem;font-size:1.08rem;color:#C7D3E2;max-width:700px}
.hero .lede strong{color:#fff}
.cta-row{display:flex;flex-wrap:wrap;gap:.8rem;margin-top:1.8rem}
.btn{
  display:inline-flex;align-items:center;gap:.5rem;
  padding:.78rem 1.35rem;border-radius:8px;font-weight:700;font-size:.95rem;
  transition:transform .15s ease,box-shadow .15s ease,background .15s ease;
}
.btn:hover{text-decoration:none;transform:translateY(-1px)}
.btn-wa{background:var(--wa);color:#06341B}
.btn-wa:hover{background:#3BE07B;box-shadow:0 8px 22px rgba(37,211,102,.3)}
.btn-line{border:1px solid rgba(255,255,255,.4);color:#fff}
.btn-line:hover{border-color:#fff;background:rgba(255,255,255,.06)}
.btn-navy{background:var(--ink);color:#fff}
.btn-navy:hover{background:var(--navy);box-shadow:0 8px 22px rgba(11,24,48,.25)}
.cred-strip{display:flex;flex-wrap:wrap;gap:.55rem;margin-top:1.9rem}
.cred{
  font-family:var(--mono);font-size:.7rem;letter-spacing:.06em;
  border:1px solid rgba(255,255,255,.22);border-radius:99px;
  padding:.34rem .8rem;color:#C7D3E2;background:rgba(255,255,255,.04);
}
.cred b{color:var(--cyan);font-weight:600}
.breadcrumb{font-family:var(--mono);font-size:.72rem;letter-spacing:.05em;color:var(--steel-lt);margin-bottom:1.2rem}
.breadcrumb a{color:var(--steel-lt)}
.breadcrumb a:hover{color:#fff}

/* ---------- Sections ---------- */
.section{padding:4rem 0}
.section.alt{background:var(--paper);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.section.dark{background:var(--ink);color:#D5DEEA}
.section.dark h2,.section.dark h3{color:#fff}
.sec-head{max-width:780px;margin-bottom:2.2rem}
.sec-label{
  font-family:var(--mono);font-size:.7rem;letter-spacing:.2em;text-transform:uppercase;
  color:var(--cyan-dk);display:inline-flex;align-items:center;gap:.6rem;margin-bottom:.7rem;
}
.sec-label::before{content:"";width:26px;height:1px;background:var(--cyan-dk)}
.section.dark .sec-label{color:var(--cyan)}
.section.dark .sec-label::before{background:var(--cyan)}
h2{font-size:clamp(1.5rem,3vw,2.1rem);line-height:1.2;color:var(--ink);letter-spacing:-.01em;font-weight:700}
h3{font-size:1.17rem;color:var(--ink);margin:1.9rem 0 .65rem;font-weight:700}
h3:first-child{margin-top:0}
.prose p{margin-bottom:1rem;max-width:74ch}
.prose ul,.prose ol{margin:0 0 1.2rem 1.3rem;max-width:72ch}
.prose li{margin-bottom:.45rem}
.prose li::marker{color:var(--cyan-dk)}
.answer-box{
  border-left:3px solid var(--cyan);
  background:linear-gradient(90deg,rgba(31,169,224,.07),transparent 70%);
  padding:1.15rem 1.3rem;border-radius:0 8px 8px 0;margin-bottom:1.5rem;max-width:78ch;
}
.answer-box p{margin:0;font-size:1.02rem}
.answer-box p+p{margin-top:.7rem}

/* ---------- Cards ---------- */
.grid{display:grid;gap:1.2rem}
.grid.cols-3{grid-template-columns:repeat(3,1fr)}
.grid.cols-2{grid-template-columns:repeat(2,1fr)}
.grid.cols-4{grid-template-columns:repeat(4,1fr)}
@media (max-width:900px){.grid.cols-3,.grid.cols-4{grid-template-columns:repeat(2,1fr)}}
@media (max-width:620px){.grid.cols-3,.grid.cols-2,.grid.cols-4{grid-template-columns:1fr}}
.card{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  padding:1.5rem 1.4rem;transition:box-shadow .2s ease,transform .2s ease,border-color .2s ease;
  display:flex;flex-direction:column;
}
.card:hover{box-shadow:0 14px 34px rgba(11,24,48,.1);transform:translateY(-2px);border-color:#CBD8E6}
.card .tag{
  font-family:var(--mono);font-size:.66rem;letter-spacing:.14em;color:var(--cyan-dk);
  text-transform:uppercase;margin-bottom:.7rem;
}
.card h3{margin:0 0 .55rem;font-size:1.06rem}
.card p{font-size:.92rem;color:var(--steel);flex:1}
.card .more{margin-top:1rem;font-weight:600;font-size:.88rem;color:var(--cyan-dk)}
a.card{color:inherit}
a.card:hover{text-decoration:none}

/* ---------- Steps (real sequence) ---------- */
.steps{counter-reset:step;display:grid;gap:1.1rem;grid-template-columns:repeat(4,1fr)}
@media (max-width:900px){.steps{grid-template-columns:repeat(2,1fr)}}
@media (max-width:620px){.steps{grid-template-columns:1fr}}
.step{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:1.4rem 1.3rem;position:relative}
.step::before{
  counter-increment:step;content:"0" counter(step);
  font-family:var(--mono);font-weight:600;font-size:.85rem;color:var(--cyan-dk);
  border-bottom:2px solid var(--cyan);padding-bottom:.3rem;display:inline-block;margin-bottom:.8rem;
}
.step h3{margin:0 0 .4rem;font-size:1rem}
.step p{font-size:.88rem;color:var(--steel)}

/* ---------- Tables ---------- */
.tbl-wrap{overflow-x:auto;border:1px solid var(--line);border-radius:var(--radius);margin:1.2rem 0}
table{width:100%;border-collapse:collapse;font-size:.93rem;min-width:520px}
th{
  background:var(--ink);color:#fff;text-align:left;padding:.8rem 1rem;
  font-family:var(--mono);font-size:.7rem;letter-spacing:.1em;text-transform:uppercase;font-weight:600;
}
td{padding:.78rem 1rem;border-top:1px solid var(--line)}
tbody tr:nth-child(even){background:var(--paper)}
td.num{font-family:var(--mono);white-space:nowrap;color:var(--ink);font-weight:600}
.tbl-note{font-size:.82rem;color:var(--steel);margin-top:-.4rem}

/* ---------- FAQ ---------- */
.faq details{border:1px solid var(--line);border-radius:8px;margin-bottom:.7rem;background:#fff}
.faq summary{
  cursor:pointer;padding:1rem 1.2rem;font-weight:600;color:var(--ink);
  list-style:none;display:flex;justify-content:space-between;gap:1rem;align-items:center;
}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";font-family:var(--mono);color:var(--cyan-dk);font-size:1.1rem;flex-shrink:0}
.faq details[open] summary::after{content:"–"}
.faq details[open]{border-color:#BFD3E4;box-shadow:0 6px 18px rgba(11,24,48,.06)}
.faq .faq-a{padding:0 1.2rem 1.1rem;color:var(--graphite);font-size:.95rem}
.faq .faq-a p{margin-bottom:.7rem}
.faq .faq-a p:last-child{margin-bottom:0}

/* ---------- Engineer / EEAT panel ---------- */
.eng-panel{display:grid;grid-template-columns:repeat(2,1fr);gap:1.2rem}
@media (max-width:760px){.eng-panel{grid-template-columns:1fr}}
.eng{
  border:1px solid var(--line);border-radius:var(--radius);padding:1.5rem;background:#fff;
  border-top:3px solid var(--cyan);
}
.eng .reg{font-family:var(--mono);font-size:.72rem;color:var(--cyan-dk);letter-spacing:.08em;margin-bottom:.5rem}
.eng h3{margin:0 0 .3rem}
.eng .role{color:var(--steel);font-size:.9rem;margin-bottom:.7rem}
.eng ul{margin:0 0 0 1.1rem;font-size:.9rem;color:var(--graphite)}
.eng li{margin-bottom:.35rem}

/* ---------- Authority strip ---------- */
.auth-strip{display:flex;flex-wrap:wrap;gap:.6rem}
.auth{
  font-family:var(--mono);font-size:.74rem;letter-spacing:.06em;
  border:1px solid var(--line);background:#fff;border-radius:8px;padding:.55rem .95rem;color:var(--graphite);
}
.auth b{color:var(--ink)}
.section.dark .auth{background:rgba(255,255,255,.05);border-color:rgba(255,255,255,.15);color:#C7D3E2}
.section.dark .auth b{color:#fff}

/* ---------- CTA band ---------- */
.cta-band{
  background:linear-gradient(120deg,var(--navy) 0%,var(--ink) 100%);
  color:#fff;border-radius:14px;padding:2.6rem 2.2rem;
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:1.4rem;
  position:relative;overflow:hidden;
}
.cta-band::before{
  content:"";position:absolute;inset:0;
  background-image:linear-gradient(rgba(255,255,255,.05) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.05) 1px,transparent 1px);
  background-size:32px 32px;pointer-events:none;
}
.cta-band h2{color:#fff;font-size:1.5rem;position:relative}
.cta-band p{color:#C7D3E2;margin-top:.4rem;max-width:520px;position:relative}
.cta-band .cta-row{margin-top:0;position:relative}

/* ---------- Footer ---------- */
.site-footer{background:var(--ink);color:#9FB0C4;font-size:.88rem}
.site-footer .foot-grid{
  display:grid;grid-template-columns:2fr 1fr 1fr 1.2fr;gap:2rem;padding:3.2rem 0 2.2rem;
}
@media (max-width:900px){.site-footer .foot-grid{grid-template-columns:1fr 1fr}}
@media (max-width:560px){.site-footer .foot-grid{grid-template-columns:1fr}}
.site-footer h4{
  color:#fff;font-family:var(--mono);font-size:.7rem;letter-spacing:.18em;
  text-transform:uppercase;margin-bottom:1rem;font-weight:600;
}
.site-footer ul{list-style:none}
.site-footer li{margin-bottom:.5rem}
.site-footer a{color:#9FB0C4}
.site-footer a:hover{color:#fff}
.foot-brand{display:flex;align-items:center;gap:.6rem;color:#fff;font-weight:700;margin-bottom:.9rem}
.foot-brand img{width:30px;height:30px;background:#fff;border-radius:6px;padding:2px}
.foot-disclaimer{
  border-top:1px solid rgba(255,255,255,.1);padding:1.4rem 0;font-size:.78rem;color:#7E90A6;line-height:1.6;
}
.foot-disclaimer p{margin-bottom:.5rem;max-width:none}
.foot-bottom{border-top:1px solid rgba(255,255,255,.1);padding:1.1rem 0;font-size:.78rem;display:flex;flex-wrap:wrap;gap:.8rem;justify-content:space-between}

/* ---------- WhatsApp float ---------- */
.wa-float{
  position:fixed;right:18px;bottom:18px;z-index:120;
  width:56px;height:56px;border-radius:50%;background:var(--wa);
  display:flex;align-items:center;justify-content:center;
  box-shadow:0 8px 24px rgba(0,0,0,.28);transition:transform .15s ease;
}
.wa-float:hover{transform:scale(1.07)}
.wa-float svg{width:30px;height:30px;fill:#fff}

/* ---------- Blog cards / misc ---------- */
.post-meta{font-family:var(--mono);font-size:.72rem;color:var(--steel);letter-spacing:.06em;margin-bottom:.5rem}
.two-col{display:grid;grid-template-columns:1.5fr 1fr;gap:2.6rem;align-items:start}
@media (max-width:860px){.two-col{grid-template-columns:1fr}}
.side-card{
  border:1px solid var(--line);border-radius:var(--radius);padding:1.4rem;background:var(--paper);
  position:sticky;top:86px;
}
.side-card h3{margin-top:0;font-size:1rem}
.side-card ul{list-style:none;margin:0}
.side-card li{margin-bottom:.55rem;font-size:.9rem}
.contact-list{list-style:none}
.contact-list li{margin-bottom:.9rem;display:flex;gap:.7rem;align-items:baseline}
.contact-list .k{font-family:var(--mono);font-size:.68rem;letter-spacing:.12em;text-transform:uppercase;color:var(--steel);min-width:86px}
.zh{font-size:.98rem}
.zh h3{font-size:1.08rem}
.hero-cover{margin-top:2.2rem;border-radius:12px;overflow:hidden;border:1px solid rgba(255,255,255,.14);box-shadow:0 22px 60px rgba(0,0,0,.35)}