/* =========================================================
   PS2K ENGINEERING — shared stylesheet
   โทน: วิศวกรรมไฟฟ้า/สายส่ง — กริดเส้นสายไฟ, กรมท่า + ส้มนิรภัย
   ========================================================= */

@import url('https://fonts.googleapis.com/css2?family=Chakra+Petch:wght@500;600;700&family=Noto+Sans+Thai:wght@400;500;600;700&family=Noto+Sans:wght@400;500;600;700&display=swap');

:root{
  /* --- สี --- */
  --navy-950:#0E1D30;
  --navy-900:#12233D;
  --navy-800:#1B3050;
  --steel-600:#4C5C70;
  --steel-300:#9AA7B5;
  --sand-50:#F4F2EC;
  --sand-100:#EDEAE1;
  --line-200:#DAD5C8;
  --orange-600:#E1600C;
  --orange-500:#F07A1F;
  --ink-900:#171B20;
  --white:#FFFFFF;

  /* --- ตัวอักษร --- */
  --font-head:'Chakra Petch','Noto Sans Thai',sans-serif;
  --font-body:'Noto Sans Thai','Noto Sans',sans-serif;

  --radius-s:4px;
  --radius-m:8px;
  --maxw:1180px;
}

*,*::before,*::after{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;
  font-family:var(--font-body);
  color:var(--ink-900);
  background:var(--white);
  line-height:1.7;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;}
h1,h2,h3,h4{
  font-family:var(--font-head);
  font-weight:600;
  line-height:1.25;
  margin:0 0 .5em;
  color:var(--navy-950);
}
p{margin:0 0 1em;}
ul{margin:0;padding:0;list-style:none;}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 24px;}
section{padding:88px 0;}
@media(max-width:720px){section{padding:56px 0;}}

.eyebrow-line{
  display:flex;align-items:center;gap:14px;
  font-size:.8rem;color:var(--steel-600);letter-spacing:.02em;margin-bottom:14px;
}
.eyebrow-line::before{
  content:"";width:34px;height:2px;background:var(--orange-600);flex:0 0 auto;
}

/* buttons */
.btn{
  display:inline-flex;align-items:center;gap:8px;
  padding:14px 26px;border-radius:var(--radius-s);
  font-family:var(--font-head);font-weight:600;font-size:.98rem;
  border:1.5px solid transparent;cursor:pointer;transition:background .15s,color .15s,border-color .15s;
}
.btn-primary{background:var(--orange-600);color:var(--white);}
.btn-primary:hover{background:var(--orange-500);}
.btn-outline{border-color:rgba(255,255,255,.55);color:var(--white);}
.btn-outline:hover{background:rgba(255,255,255,.12);}
.btn-navy{border-color:var(--navy-900);color:var(--navy-900);}
.btn-navy:hover{background:var(--navy-900);color:var(--white);}

/* =============== HEADER =============== */
header.site{
  position:sticky;top:0;z-index:50;
  background:var(--white);
  border-bottom:1px solid var(--line-200);
}
.nav-row{
  display:flex;align-items:center;justify-content:space-between;
  height:78px;
}
.brand{display:flex;align-items:center;gap:12px;font-family:var(--font-head);}
.brand-mark{
  width:42px;height:42px;border-radius:6px;
  background:var(--navy-900);
  display:flex;align-items:center;justify-content:center;flex:0 0 auto;
}
.brand-name{line-height:1.25;}
.brand-name strong{display:block;font-size:1.02rem;color:var(--navy-950);}
.brand-name span{display:block;font-size:.72rem;color:var(--steel-600);font-family:var(--font-body);}

nav.main-links{display:flex;gap:2px;}
nav.main-links a{
  padding:10px 16px;font-size:.95rem;color:var(--navy-800);
  border-bottom:2px solid transparent;
}
nav.main-links a:hover,nav.main-links a.active{
  color:var(--orange-600);border-bottom-color:var(--orange-600);
}
.nav-cta{display:flex;align-items:center;gap:14px;}
.nav-tel{
  font-family:var(--font-head);font-weight:600;color:var(--navy-950);font-size:.95rem;
  display:flex;align-items:center;gap:8px;
}
.burger{display:none;background:none;border:0;cursor:pointer;padding:8px;}
.burger span{display:block;width:24px;height:2px;background:var(--navy-950);margin:5px 0;}

@media(max-width:920px){
  nav.main-links{
    position:fixed;inset:78px 0 0 0;background:var(--white);
    flex-direction:column;padding:12px 24px;gap:0;
    transform:translateX(100%);transition:transform .2s ease;
    border-top:1px solid var(--line-200);
  }
  nav.main-links.open{transform:translateX(0);}
  nav.main-links a{padding:16px 4px;border-bottom:1px solid var(--line-200);}
  .nav-tel{display:none;}
  .burger{display:block;}
}

/* =============== HERO =============== */
.hero{
  position:relative;color:var(--white);
  min-height:560px;display:flex;align-items:flex-end;
  background:var(--navy-950);
  overflow:hidden;
}
.hero img.bg{
  position:absolute;inset:0;width:100%;height:100%;object-fit:cover;
  opacity:.55;
}
.hero::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(14,29,48,.35) 0%,rgba(14,29,48,.55) 45%,rgba(14,29,48,.96) 100%);
}
.hero-inner{position:relative;z-index:2;padding:64px 0 56px;}
.hero-badge{
  display:inline-flex;align-items:center;gap:8px;
  background:rgba(255,255,255,.1);border:1px solid rgba(255,255,255,.3);
  padding:6px 14px;border-radius:100px;font-size:.82rem;margin-bottom:22px;
}
.hero h1{color:var(--white);font-size:clamp(1.9rem,4vw,3.1rem);max-width:820px;margin-bottom:.4em;}
.hero p.lead{color:var(--sand-100);max-width:600px;font-size:1.08rem;margin-bottom:28px;}
.hero-actions{display:flex;gap:14px;flex-wrap:wrap;}

.hero-small{min-height:320px;}
.hero-small .hero-inner{padding:48px 0 40px;}

/* =============== STRIP (quick facts) =============== */
.fact-strip{
  background:var(--navy-900);color:var(--white);
  padding:0;
}
.fact-strip .wrap{
  display:grid;grid-template-columns:repeat(4,1fr);
}
.fact-strip .item{
  padding:26px 24px;border-left:1px solid rgba(255,255,255,.14);
}
.fact-strip .item:first-child{border-left:none;}
.fact-strip .item b{display:block;font-family:var(--font-head);font-size:1.05rem;margin-bottom:4px;}
.fact-strip .item small{color:var(--steel-300);font-size:.8rem;}
@media(max-width:860px){
  .fact-strip .wrap{grid-template-columns:repeat(2,1fr);}
  .fact-strip .item{border-left:none;border-top:1px solid rgba(255,255,255,.14);}
  .fact-strip .item:nth-child(odd){border-left:1px solid rgba(255,255,255,.14);}
}

/* =============== SECTION HEADS =============== */
.section-head{max-width:680px;margin-bottom:44px;}
.section-head.center{margin-left:auto;margin-right:auto;text-align:center;}
.section-head h2{font-size:clamp(1.5rem,3vw,2.1rem);}
.section-head p{color:var(--steel-600);font-size:1.02rem;}

/* =============== CARDS =============== */
.grid-4{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;}
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;}
.grid-2{display:grid;grid-template-columns:1fr 1fr;gap:24px;}
@media(max-width:920px){.grid-4{grid-template-columns:repeat(2,1fr);}.grid-3{grid-template-columns:1fr 1fr;}}
@media(max-width:620px){.grid-4,.grid-3,.grid-2{grid-template-columns:1fr;}}

.card-service{
  border:1px solid var(--line-200);border-radius:var(--radius-m);overflow:hidden;
  background:var(--white);display:flex;flex-direction:column;
}
.card-service .thumb{aspect-ratio:4/3;overflow:hidden;background:var(--sand-100);}
.card-service .thumb img{width:100%;height:100%;object-fit:cover;}
.card-service .body{padding:20px 20px 24px;flex:1;display:flex;flex-direction:column;}
.card-service h3{font-size:1.08rem;margin-bottom:.4em;}
.card-service p{color:var(--steel-600);font-size:.94rem;margin-bottom:0;flex:1;}
.card-service .tag{
  font-size:.72rem;color:var(--orange-600);font-family:var(--font-head);font-weight:600;
  margin-bottom:10px;
}

/* process steps (numbered — genuine sequence) */
.steps{
  display:grid;grid-template-columns:repeat(4,1fr);gap:0;position:relative;
}
.steps::before{
  content:"";position:absolute;top:26px;left:6%;right:6%;height:2px;
  background:repeating-linear-gradient(90deg,var(--line-200) 0 10px,transparent 10px 18px);
  z-index:0;
}
.step{position:relative;z-index:1;padding:0 18px 0 0;}
.step .num{
  width:52px;height:52px;border-radius:50%;background:var(--navy-900);color:var(--white);
  display:flex;align-items:center;justify-content:center;font-family:var(--font-head);
  font-size:1.15rem;font-weight:700;margin-bottom:18px;
}
.step h4{font-size:1rem;margin-bottom:.35em;}
.step p{color:var(--steel-600);font-size:.9rem;}
@media(max-width:860px){
  .steps{grid-template-columns:1fr 1fr;gap:32px 20px;}
  .steps::before{display:none;}
}
@media(max-width:520px){.steps{grid-template-columns:1fr;}}

/* why-us list */
.check-list{display:grid;gap:16px;}
.check-list li{display:flex;gap:14px;align-items:flex-start;}
.check-list .ico{
  width:26px;height:26px;border-radius:50%;background:var(--orange-600);color:#fff;
  flex:0 0 auto;display:flex;align-items:center;justify-content:center;font-size:.8rem;margin-top:2px;
}
.check-list b{display:block;color:var(--navy-950);font-family:var(--font-head);font-size:1rem;font-weight:600;}
.check-list span{color:var(--steel-600);font-size:.92rem;}

/* split section */
.split{display:grid;grid-template-columns:1.05fr .95fr;gap:56px;align-items:center;}
@media(max-width:880px){.split{grid-template-columns:1fr;gap:32px;}}
.split img{border-radius:var(--radius-m);width:100%;object-fit:cover;aspect-ratio:4/3;}

.bg-sand{background:var(--sand-50);}
.bg-navy{background:var(--navy-950);color:var(--white);}
.bg-navy h2,.bg-navy h3{color:var(--white);}
.bg-navy p{color:var(--sand-100);}

/* CTA band */
.cta-band{
  background:var(--navy-950);color:var(--white);border-radius:var(--radius-m);
  padding:52px 44px;display:flex;align-items:center;justify-content:space-between;gap:24px;flex-wrap:wrap;
  background-image:linear-gradient(120deg,var(--navy-950) 0%,var(--navy-800) 100%);
}
.cta-band h3{color:var(--white);font-size:1.5rem;margin-bottom:.3em;}
.cta-band p{color:var(--steel-300);margin:0;}

/* info table (about / privacy) */
.info-table{width:100%;border-collapse:collapse;}
.info-table tr{border-bottom:1px solid var(--line-200);}
.info-table td{padding:14px 10px;vertical-align:top;font-size:.96rem;}
.info-table td:first-child{color:var(--steel-600);width:220px;font-family:var(--font-head);font-weight:600;font-size:.88rem;}

/* contact page */
.contact-grid{display:grid;grid-template-columns:.9fr 1.1fr;gap:40px;}
@media(max-width:880px){.contact-grid{grid-template-columns:1fr;}}
.contact-card{border:1px solid var(--line-200);border-radius:var(--radius-m);padding:28px;}
.contact-card + .contact-card{margin-top:18px;}
.contact-row{display:flex;gap:16px;padding:14px 0;border-bottom:1px solid var(--line-200);}
.contact-row:last-child{border-bottom:none;}
.contact-row .ic{
  width:40px;height:40px;border-radius:8px;background:var(--sand-50);
  display:flex;align-items:center;justify-content:center;flex:0 0 auto;color:var(--orange-600);
}
.contact-row b{display:block;font-family:var(--font-head);font-size:.92rem;color:var(--navy-950);}
.contact-row span,.contact-row a{color:var(--steel-600);font-size:.94rem;}
.map-frame{width:100%;height:100%;min-height:420px;border:1px solid var(--line-200);border-radius:var(--radius-m);overflow:hidden;}
.map-frame iframe{width:100%;height:100%;min-height:420px;border:0;display:block;}

.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px;}
.form-grid .full{grid-column:1/-1;}
@media(max-width:560px){.form-grid{grid-template-columns:1fr;}}
label{display:block;font-size:.86rem;color:var(--navy-950);margin-bottom:6px;font-family:var(--font-head);font-weight:600;}
input,textarea{
  width:100%;padding:12px 14px;border:1px solid var(--line-200);border-radius:var(--radius-s);
  font-family:var(--font-body);font-size:.95rem;color:var(--ink-900);background:var(--white);
}
input:focus,textarea:focus{outline:2px solid var(--orange-500);outline-offset:1px;border-color:var(--orange-500);}
textarea{resize:vertical;min-height:120px;}

/* breadcrumb / page hero title */
.page-kicker{color:var(--steel-300);font-size:.85rem;margin-bottom:10px;}

/* =============== FOOTER =============== */
footer.site{background:var(--navy-950);color:var(--sand-100);padding:64px 0 0;}
.footer-grid{display:grid;grid-template-columns:1.3fr 1fr 1fr 1fr;gap:36px;padding-bottom:44px;}
@media(max-width:820px){.footer-grid{grid-template-columns:1fr 1fr;}}
@media(max-width:520px){.footer-grid{grid-template-columns:1fr;}}
footer.site h4{color:var(--white);font-size:.92rem;margin-bottom:16px;}
footer.site p{color:var(--steel-300);font-size:.9rem;}
footer.site ul li{margin-bottom:10px;}
footer.site ul li a{color:var(--steel-300);font-size:.9rem;}
footer.site ul li a:hover{color:var(--orange-500);}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.12);padding:20px 0;
  display:flex;justify-content:space-between;flex-wrap:wrap;gap:10px;
  font-size:.82rem;color:var(--steel-300);
}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:14px;}
.footer-brand .brand-mark{background:var(--orange-600);}

/* focus visibility */
a:focus-visible,button:focus-visible{outline:2px solid var(--orange-500);outline-offset:2px;}

@media(prefers-reduced-motion:reduce){
  html{scroll-behavior:auto;}
  *{transition:none !important;}
}