/* ===========================================================
   GEO-TECH SOLUTIONS — Brand stylesheet
   Brand colours: Orange #E2571F · Charcoal #2B2B2B · Steel #54575C
   =========================================================== */

:root{
  --orange:#E2571F;
  --orange-dark:#C2440F;
  --orange-soft:#FCEDE5;
  --charcoal:#2B2B2B;
  --ink:#1C1C1E;
  --steel:#54575C;
  --grey:#6B6F76;
  --line:#E6E7EA;
  --bg:#FFFFFF;
  --bg-soft:#F6F7F9;
  --bg-dark:#222427;
  --white:#FFFFFF;
  --radius:14px;
  --radius-sm:9px;
  --shadow:0 10px 30px rgba(20,22,26,.08);
  --shadow-lg:0 24px 60px rgba(20,22,26,.16);
  --maxw:1180px;
  --header-h:74px;
  --ease:cubic-bezier(.22,.61,.36,1);
  --font:"Inter","IBM Plex Sans Thai","Noto Sans Thai",system-ui,-apple-system,"Segoe UI",sans-serif;
}

*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:var(--font);
  color:var(--ink);
  background:var(--bg);
  line-height:1.65;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{max-width:100%;display:block}
svg{flex:0 0 auto}
a{color:inherit;text-decoration:none}
.container{max-width:var(--maxw);margin:0 auto;padding:0 24px}

/* ---------- Language visibility ---------- */
html[data-lang="th"] .en{display:none}
html[data-lang="en"] .th{display:none}

/* ---------- Header ---------- */
.site-header{
  position:fixed;top:0;left:0;right:0;z-index:1000;height:var(--header-h);
  display:flex;align-items:center;
  background:rgba(255,255,255,.86);
  backdrop-filter:saturate(180%) blur(14px);
  border-bottom:1px solid transparent;
  transition:border-color .3s,box-shadow .3s,background .3s;
}
.site-header.scrolled{border-bottom-color:var(--line);box-shadow:0 6px 24px rgba(20,22,26,.05)}
.site-header .container{display:flex;align-items:center;justify-content:space-between;width:100%}
.brand{display:flex;align-items:center;gap:12px}
.brand img{height:34px;width:auto}
.nav{display:flex;align-items:center;gap:6px}
.nav a{
  font-size:15px;font-weight:500;color:var(--steel);
  padding:9px 14px;border-radius:8px;transition:.2s color,.2s background;
}
.nav a:hover{color:var(--ink);background:var(--bg-soft)}
.nav a.active{color:var(--orange)}
.header-tools{display:flex;align-items:center;gap:10px}
.lang-toggle{
  display:inline-flex;border:1px solid var(--line);border-radius:999px;overflow:hidden;
  font-size:13px;font-weight:600;background:var(--white);
}
.lang-toggle button{
  border:0;background:transparent;cursor:pointer;padding:6px 12px;color:var(--grey);
  font-weight:600;transition:.2s;
}
.lang-toggle button.active{background:var(--charcoal);color:var(--white)}
.btn{
  display:inline-flex;align-items:center;gap:8px;justify-content:center;
  font-weight:600;font-size:15px;border-radius:999px;padding:11px 22px;
  cursor:pointer;border:1px solid transparent;transition:.22s var(--ease);white-space:nowrap;
}
.btn svg{width:18px;height:18px}
.btn-primary{background:var(--orange);color:#fff}
.btn-primary:hover{background:var(--orange-dark);transform:translateY(-1px);box-shadow:0 10px 22px rgba(226,87,31,.32)}
.btn-ghost{background:transparent;color:var(--ink);border-color:var(--line)}
.btn-ghost:hover{border-color:var(--charcoal)}
.btn-light{background:#fff;color:var(--ink)}
.btn-light:hover{transform:translateY(-1px);box-shadow:var(--shadow)}
.btn-outline-light{background:transparent;color:#fff;border-color:rgba(255,255,255,.4)}
.btn-outline-light:hover{border-color:#fff;background:rgba(255,255,255,.08)}
.btn-sm{padding:8px 16px;font-size:14px}
.menu-btn{display:none;background:none;border:0;cursor:pointer;width:42px;height:42px;border-radius:8px}
.menu-btn span{display:block;width:22px;height:2px;background:var(--ink);margin:5px auto;transition:.3s}
.menu-btn.open span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.menu-btn.open span:nth-child(2){opacity:0}
.menu-btn.open span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}

/* ---------- Hero ---------- */
.hero{position:relative;min-height:88vh;display:flex;align-items:center;color:#fff;overflow:hidden}
.hero-bg{position:absolute;inset:0;z-index:-2}
.hero-bg img{width:100%;height:100%;object-fit:cover}
.hero::after{content:"";position:absolute;inset:0;z-index:-1;
  background:linear-gradient(105deg,rgba(20,21,23,.92) 0%,rgba(24,25,28,.78) 42%,rgba(20,21,23,.35) 100%)}
.hero .container{padding-top:120px;padding-bottom:80px}
.eyebrow{display:inline-flex;align-items:center;gap:9px;font-size:13px;font-weight:700;
  letter-spacing:.16em;text-transform:uppercase;color:var(--orange);margin-bottom:22px}
.eyebrow::before{content:"";width:30px;height:2px;background:var(--orange)}
.hero h1{font-size:clamp(2.3rem,5.2vw,4rem);line-height:1.08;font-weight:800;letter-spacing:-.02em;max-width:16ch}
.hero h1 .accent{color:var(--orange)}
.hero p.lead{font-size:clamp(1.05rem,1.6vw,1.28rem);color:rgba(255,255,255,.82);max-width:54ch;margin-top:22px}
.hero-actions{display:flex;gap:14px;flex-wrap:wrap;margin-top:34px}
.hero-stats{display:flex;gap:42px;flex-wrap:wrap;margin-top:56px;padding-top:30px;border-top:1px solid rgba(255,255,255,.16)}
.hero-stats .num{font-size:2.1rem;font-weight:800;color:#fff;line-height:1}
.hero-stats .lbl{font-size:.85rem;color:rgba(255,255,255,.7);margin-top:6px}

/* ---------- Sections ---------- */
section{padding:96px 0}
.section-head{max-width:720px;margin-bottom:54px}
.section-head.center{margin-left:auto;margin-right:auto;text-align:center}
.kicker{display:inline-block;font-size:13px;font-weight:700;letter-spacing:.14em;text-transform:uppercase;color:var(--orange);margin-bottom:14px}
h2{font-size:clamp(1.8rem,3.2vw,2.6rem);font-weight:800;letter-spacing:-.02em;line-height:1.15;color:var(--ink)}
h3{font-size:1.25rem;font-weight:700;color:var(--ink)}
.section-head p{color:var(--grey);font-size:1.08rem;margin-top:16px}
.bg-soft{background:var(--bg-soft)}
.bg-dark{background:var(--bg-dark);color:#fff}
.bg-dark h2,.bg-dark h3{color:#fff}
.bg-dark .section-head p{color:rgba(255,255,255,.72)}

/* ---------- Feature cards ---------- */
.grid{display:grid;gap:24px}
.grid-3{grid-template-columns:repeat(3,1fr)}
.grid-2{grid-template-columns:repeat(2,1fr)}
.grid-4{grid-template-columns:repeat(4,1fr)}
.card{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:32px;
  transition:.28s var(--ease);height:100%;
}
.card:hover{transform:translateY(-4px);box-shadow:var(--shadow);border-color:transparent}
.card .ic,.pillar .ic{width:52px;height:52px;border-radius:13px;display:grid;place-items:center;
  background:var(--orange-soft);color:var(--orange);margin-bottom:20px}
.card .ic svg,.pillar .ic svg{width:26px;height:26px}
.card h3{margin-bottom:10px}
.card p{color:var(--grey);font-size:.98rem}

/* value pillars on dark */
.pillar{padding:30px;border:1px solid rgba(255,255,255,.12);border-radius:var(--radius);background:rgba(255,255,255,.03);transition:.28s}
.pillar:hover{background:rgba(255,255,255,.06);border-color:rgba(226,87,31,.5)}
.pillar .ic{background:rgba(226,87,31,.14);color:var(--orange)}
.pillar p{color:rgba(255,255,255,.72)}

/* ---------- Split / media ---------- */
.split{display:grid;grid-template-columns:1fr 1fr;gap:60px;align-items:center}
.split.reverse .media{order:2}
.media{border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow);position:relative}
.media img{width:100%;height:100%;object-fit:cover;min-height:340px}
.prose p{color:var(--steel);font-size:1.05rem;margin-bottom:16px}
.tick-list{list-style:none;margin-top:22px;display:grid;gap:14px}
.tick-list li{display:flex;gap:13px;align-items:flex-start;color:var(--ink);font-size:1.02rem}
.tick-list li svg{flex:0 0 22px;width:22px;height:22px;color:var(--orange);margin-top:3px}

/* process steps */
.steps{counter-reset:s;display:grid;gap:20px}
.step{display:grid;grid-template-columns:auto 1fr;gap:22px;align-items:start;
  padding:26px;border:1px solid var(--line);border-radius:var(--radius);background:#fff;transition:.25s}
.step:hover{box-shadow:var(--shadow);border-color:transparent}
.step .n{counter-increment:s;width:46px;height:46px;border-radius:50%;background:var(--charcoal);color:#fff;
  display:grid;place-items:center;font-weight:800;font-size:1.05rem;flex:0 0 46px}
.step .n::before{content:counter(s,decimal-leading-zero)}
.step h3{margin-bottom:6px}
.step p{color:var(--grey);font-size:.97rem}

/* ---------- Stats band ---------- */
.stat-band{display:grid;grid-template-columns:repeat(4,1fr);gap:30px;text-align:center}
.stat-band .num{font-size:2.6rem;font-weight:800;color:var(--orange);line-height:1}
.stat-band .lbl{color:var(--grey);margin-top:8px;font-size:.95rem}

/* ---------- Projects ---------- */
.proj-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.proj{position:relative;border-radius:var(--radius);overflow:hidden;aspect-ratio:4/3;background:#222}
.proj img{width:100%;height:100%;object-fit:cover;transition:.5s var(--ease)}
.proj:hover img{transform:scale(1.06)}
.proj .cap{position:absolute;inset:auto 0 0 0;padding:20px;color:#fff;
  background:linear-gradient(transparent,rgba(15,16,18,.85));font-weight:600;font-size:.95rem}
.proj .tag{position:absolute;top:14px;left:14px;background:var(--orange);color:#fff;
  font-size:11px;font-weight:700;letter-spacing:.05em;padding:5px 11px;border-radius:999px;text-transform:uppercase}

/* project record table */
.table-wrap{overflow-x:auto;border:1px solid var(--line);border-radius:var(--radius);background:#fff}
table.records{width:100%;border-collapse:collapse;min-width:640px}
table.records th,table.records td{text-align:left;padding:16px 18px;border-bottom:1px solid var(--line);font-size:.95rem}
table.records th{background:var(--bg-soft);font-weight:700;color:var(--charcoal);font-size:.8rem;letter-spacing:.05em;text-transform:uppercase}
table.records tr:last-child td{border-bottom:0}
.badge{display:inline-block;padding:4px 11px;border-radius:999px;font-size:.78rem;font-weight:700}
.badge.done{background:#E7F6EC;color:#1A8245}
.badge.active{background:var(--orange-soft);color:var(--orange-dark)}

/* ---------- CTA band ---------- */
.cta{position:relative;overflow:hidden;border-radius:var(--radius);background:var(--charcoal);
  color:#fff;padding:64px;text-align:center}
.cta::before{content:"";position:absolute;width:420px;height:420px;border-radius:50%;
  background:radial-gradient(circle,rgba(226,87,31,.45),transparent 65%);top:-160px;right:-120px}
.cta h2{color:#fff;position:relative}
.cta p{color:rgba(255,255,255,.78);max-width:52ch;margin:14px auto 28px;position:relative}
.cta .hero-actions{justify-content:center;position:relative}

/* ---------- Footer ---------- */
.site-footer{background:var(--ink);color:rgba(255,255,255,.66);padding:64px 0 30px;font-size:.95rem}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.4fr;gap:40px;margin-bottom:44px}
.site-footer img.logo{height:34px;margin-bottom:18px}
.site-footer h4{color:#fff;font-size:.85rem;letter-spacing:.08em;text-transform:uppercase;margin-bottom:18px}
.site-footer a{display:block;color:rgba(255,255,255,.66);padding:5px 0;transition:.2s}
.site-footer a:hover{color:var(--orange)}
.foot-contact li{display:flex;gap:11px;margin-bottom:13px;align-items:flex-start;list-style:none}
.foot-contact svg{width:18px;height:18px;color:var(--orange);flex:0 0 18px;margin-top:3px}
.foot-bottom{border-top:1px solid rgba(255,255,255,.1);padding-top:24px;display:flex;
  justify-content:space-between;gap:14px;flex-wrap:wrap;font-size:.85rem;color:rgba(255,255,255,.5)}

/* ---------- Page hero (inner pages) ---------- */
.page-hero{position:relative;padding:150px 0 70px;color:#fff;overflow:hidden}
.page-hero .bg{position:absolute;inset:0;z-index:-2}
.page-hero .bg img{width:100%;height:100%;object-fit:cover}
.page-hero::after{content:"";position:absolute;inset:0;z-index:-1;
  background:linear-gradient(100deg,rgba(20,21,23,.93),rgba(22,24,27,.7))}
.page-hero h1{font-size:clamp(2rem,4vw,3rem);font-weight:800;letter-spacing:-.02em}
.crumbs{font-size:.9rem;color:rgba(255,255,255,.65);margin-bottom:14px}
.crumbs a:hover{color:var(--orange)}
.page-hero p{color:rgba(255,255,255,.8);max-width:60ch;margin-top:14px;font-size:1.1rem}

/* ---------- Login ---------- */
.login-wrap{min-height:100vh;display:grid;grid-template-columns:1.05fr .95fr}
.login-aside{position:relative;color:#fff;padding:64px;display:flex;flex-direction:column;justify-content:space-between;overflow:hidden}
.login-aside .bg{position:absolute;inset:0;z-index:-2}
.login-aside .bg img{width:100%;height:100%;object-fit:cover}
.login-aside::after{content:"";position:absolute;inset:0;z-index:-1;background:linear-gradient(160deg,rgba(20,21,23,.86),rgba(194,68,15,.7))}
.login-aside .brand img{height:40px}
.login-aside h2{color:#fff;font-size:2rem;max-width:18ch}
.login-aside ul{list-style:none;display:grid;gap:14px;margin-top:22px}
.login-aside li{display:flex;gap:12px;align-items:center;color:rgba(255,255,255,.9)}
.login-aside li svg{width:20px;height:20px;color:#fff}
.login-main{display:flex;align-items:center;justify-content:center;padding:48px 24px;background:var(--bg-soft)}
.login-card{width:100%;max-width:410px}
.login-card .home-link{font-size:.9rem;color:var(--grey);margin-bottom:30px;display:inline-flex;gap:6px;align-items:center}
.login-card .home-link:hover{color:var(--orange)}
.login-card h1{font-size:1.7rem;font-weight:800;margin-bottom:6px}
.login-card .sub{color:var(--grey);margin-bottom:30px}
.field{margin-bottom:18px}
.field label{display:block;font-size:.88rem;font-weight:600;color:var(--charcoal);margin-bottom:7px}
.field input{width:100%;border:1px solid var(--line);border-radius:var(--radius-sm);padding:13px 15px;
  font-size:1rem;font-family:inherit;transition:.2s;background:#fff}
.field input:focus{outline:none;border-color:var(--orange);box-shadow:0 0 0 4px var(--orange-soft)}
.field .pw-wrap{position:relative}
.field .pw-wrap button{position:absolute;right:8px;top:50%;transform:translateY(-50%);background:none;border:0;
  cursor:pointer;color:var(--grey);padding:6px;border-radius:6px}
.field .err{color:var(--orange-dark);font-size:.82rem;margin-top:6px;display:none}
.field.invalid input{border-color:var(--orange-dark)}
.field.invalid .err{display:block}
.login-row{display:flex;justify-content:space-between;align-items:center;margin-bottom:24px;font-size:.9rem}
.login-row label{display:flex;gap:8px;align-items:center;color:var(--steel);cursor:pointer}
.login-row a{color:var(--orange);font-weight:600}
.login-card .btn{width:100%}
.login-note{margin-top:22px;padding:14px 16px;background:var(--orange-soft);border-radius:var(--radius-sm);
  font-size:.85rem;color:var(--charcoal);border:1px solid #F4D6C7}
.form-alert{display:none;padding:12px 15px;border-radius:var(--radius-sm);font-size:.9rem;margin-bottom:20px}
.form-alert.show{display:block}
.form-alert.ok{background:#E7F6EC;color:#1A8245;border:1px solid #BFE7CC}
.form-alert.bad{background:#FCE8E6;color:#C0392B;border:1px solid #F3C9C4}

/* ---------- Jet Grouting explainer ---------- */
.jet-intro{max-width:760px;margin:0 auto 56px;text-align:center}
.jet-intro .analogy{font-size:1.22rem;line-height:1.7;color:var(--ink);margin-top:18px;font-weight:500}
.jet-intro .analogy strong{color:var(--orange)}
.jet-steps{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;margin-bottom:14px}
.jstep{position:relative;background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  padding:30px 26px;text-align:center;transition:.28s var(--ease)}
.jstep:hover{transform:translateY(-5px);box-shadow:var(--shadow);border-color:transparent}
.jstep .art{width:104px;height:104px;margin:0 auto 18px}
.jstep .art svg{width:100%;height:100%;display:block}
.jstep .num-pill{display:inline-block;font-size:.74rem;font-weight:800;letter-spacing:.08em;
  color:var(--orange);background:var(--orange-soft);padding:4px 12px;border-radius:999px;margin-bottom:12px}
.jstep h3{font-size:1.12rem;margin-bottom:8px}
.jstep p{color:var(--grey);font-size:.96rem}

.spec-chips{display:flex;flex-wrap:wrap;gap:14px;justify-content:center;margin-top:38px}
.chip{display:flex;align-items:center;gap:12px;background:#fff;border:1px solid var(--line);
  border-radius:999px;padding:10px 20px 10px 12px}
.chip .ico{width:38px;height:38px;border-radius:50%;background:var(--charcoal);color:#fff;
  display:grid;place-items:center;flex:0 0 38px}
.chip .ico svg{width:20px;height:20px}
.chip .v{font-weight:800;color:var(--ink);font-size:1.05rem;line-height:1.1}
.chip .k{font-size:.78rem;color:var(--grey)}

.grout-compare{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;margin-top:18px}
.gtype{padding:24px 20px;border:1px solid var(--line);border-radius:var(--radius);background:#fff;position:relative;transition:.25s}
.gtype .gi{width:46px;height:46px;border-radius:11px;display:grid;place-items:center;
  background:var(--bg-soft);color:var(--steel);margin-bottom:14px}
.gtype .gi svg{width:24px;height:24px}
.gtype h4{font-size:1.02rem;font-weight:700;margin-bottom:5px;color:var(--ink)}
.gtype p{font-size:.88rem;color:var(--grey)}
.gtype.is-ours{border-color:var(--orange);box-shadow:0 12px 30px rgba(226,87,31,.14)}
.gtype.is-ours .gi{background:var(--orange);color:#fff}
.gtype.is-ours::after{content:"\2605";position:absolute;top:14px;right:16px;color:var(--orange);font-size:.9rem}
.gtype .star-lbl{display:inline-block;margin-top:10px;font-size:.74rem;font-weight:700;color:var(--orange);
  background:var(--orange-soft);padding:3px 10px;border-radius:999px}

/* ---------- Reveal animation ---------- */
.reveal{opacity:0;transform:translateY(24px);transition:.7s var(--ease)}
.reveal.in{opacity:1;transform:none}

/* ---------- Mobile nav ---------- */
.mobile-nav{position:fixed;inset:var(--header-h) 0 0 0;background:#fff;z-index:999;
  transform:translateX(100%);transition:transform .35s var(--ease);padding:24px;display:flex;flex-direction:column;gap:6px}
.mobile-nav.open{transform:none}
.mobile-nav a{font-size:1.15rem;font-weight:600;padding:15px 8px;border-bottom:1px solid var(--line);color:var(--ink)}
.mobile-nav .btn{margin-top:18px}

/* ---------- Responsive ---------- */
@media(max-width:980px){
  .grid-3,.grid-4,.stat-band,.proj-grid,.grout-compare{grid-template-columns:repeat(2,1fr)}
  .jet-steps{grid-template-columns:1fr;gap:18px}
  .split{grid-template-columns:1fr;gap:36px}
  .split.reverse .media{order:0}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
  .login-wrap{grid-template-columns:1fr}
  .login-aside{display:none}
}
@media(max-width:680px){
  section{padding:64px 0}
  .nav{display:none}
  .menu-btn{display:block}
  .header-tools .btn{display:none}
  .grid-3,.grid-4,.stat-band,.proj-grid,.grid-2,.grout-compare{grid-template-columns:1fr}
  .spec-chips{gap:10px}
  .footer-grid{grid-template-columns:1fr}
  .cta{padding:40px 24px}
  .hero-stats{gap:26px}
}