/* ===========================================================
   BISHOP ENGINEERING — Global Stylesheet
   Think Better, Make the Best
   =========================================================== */
:root{
  --navy:#0a1b30;--navy-2:#0d2645;--blue:#0a4da2;--blue-2:#1565c0;--sky:#1e88e5;--accent:#27a3f2;
  --steel:#5b7185;--line:#e6ebf2;--bg:#ffffff;--bg-soft:#f5f8fc;--bg-soft-2:#eef3f9;
  --ink:#12263a;--muted:#5e7186;--white:#ffffff;--radius:16px;--radius-sm:10px;
  --shadow-sm:0 2px 10px rgba(16,38,58,.06);--shadow:0 18px 50px rgba(10,38,86,.10);--shadow-lg:0 30px 80px rgba(10,38,86,.18);
  --maxw:1200px;--ease:cubic-bezier(.22,.61,.36,1);
  --ff:'Inter','Sarabun',system-ui,-apple-system,Segoe UI,Roboto,sans-serif;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:var(--ff);color:var(--ink);background:var(--bg);line-height:1.65;-webkit-font-smoothing:antialiased;overflow-x:hidden}
body[data-lang="th"]{font-family:'Sarabun','Inter',system-ui,sans-serif;line-height:1.85}
/* Thai needs more vertical room so stacked vowels/tone marks don't overlap */
body[data-lang="th"] h1,body[data-lang="th"] h2,body[data-lang="th"] h3,body[data-lang="th"] h4{line-height:1.5}
body[data-lang="th"] .display{line-height:1.34}
body[data-lang="th"] .h-sec{line-height:1.36}
body[data-lang="th"] .page-hero h1{line-height:1.4}
body[data-lang="th"] .lead{line-height:1.95}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
.container{max-width:var(--maxw);margin:0 auto;padding:0 24px}
section{position:relative}
h1,h2,h3,h4{line-height:1.18;font-weight:800;letter-spacing:-.01em;color:var(--navy)}
.display{font-size:clamp(2.4rem,6vw,4.4rem);font-weight:900;letter-spacing:-.03em;line-height:1.04}
.h-sec{font-size:clamp(1.8rem,3.6vw,2.9rem);font-weight:900;letter-spacing:-.02em}
.lead{font-size:clamp(1.02rem,1.6vw,1.22rem);color:var(--muted);font-weight:400}
.eyebrow{display:inline-flex;align-items:center;gap:8px;font-size:.78rem;font-weight:700;letter-spacing:.18em;text-transform:uppercase;color:var(--blue)}
.eyebrow::before{content:"";width:26px;height:2px;background:linear-gradient(90deg,var(--sky),var(--blue));border-radius:2px}
.text-center{text-align:center}
.sec-head{max-width:760px;margin:0 auto 54px}
.sec-head.left{margin-left:0;text-align:left}
.sec-head .lead{margin-top:14px}
.sec-head .h-sec{margin-top:14px}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:10px;padding:15px 30px;border-radius:50px;font-weight:700;font-size:.96rem;cursor:pointer;border:none;transition:transform .25s var(--ease),box-shadow .25s var(--ease),background .25s;letter-spacing:.01em}
.btn svg{width:18px;height:18px}
.btn-primary{background:linear-gradient(120deg,var(--blue),var(--sky));color:#fff;box-shadow:0 12px 30px rgba(21,101,192,.34)}
.btn-primary:hover{transform:translateY(-3px);box-shadow:0 20px 44px rgba(21,101,192,.46)}
.btn-ghost{background:rgba(255,255,255,.08);color:#fff;border:1.5px solid rgba(255,255,255,.4);backdrop-filter:blur(6px)}
.btn-ghost:hover{background:rgba(255,255,255,.18);transform:translateY(-3px)}
.btn-dark{background:var(--navy);color:#fff}
.btn-dark:hover{transform:translateY(-3px);box-shadow:var(--shadow)}
.btn-outline{background:transparent;color:var(--blue);border:1.5px solid var(--line)}
.btn-outline:hover{border-color:var(--blue);background:var(--bg-soft);transform:translateY(-3px)}
.nav{position:fixed;top:0;left:0;right:0;z-index:1000;transition:background .35s,box-shadow .35s,padding .35s;padding:18px 0}
.nav.scrolled{background:rgba(255,255,255,.92);backdrop-filter:blur(14px);box-shadow:0 6px 24px rgba(10,30,60,.08);padding:10px 0}
.nav-inner{display:flex;align-items:center;justify-content:space-between;gap:24px}
.brand{display:flex;align-items:center;gap:13px;color:#fff}
.nav.scrolled .brand,.nav.solid .brand{color:var(--navy)}
.brand-mark{width:46px;height:46px;border-radius:12px;flex:none;background:linear-gradient(135deg,var(--blue),var(--sky));display:grid;place-items:center;color:#fff;font-weight:900;font-size:1.25rem;box-shadow:0 8px 20px rgba(21,101,192,.4);letter-spacing:-.04em}
.brand-txt b{display:block;font-size:1.06rem;font-weight:900;letter-spacing:.02em;line-height:1}
.brand-txt span{display:block;font-size:.66rem;letter-spacing:.34em;text-transform:uppercase;opacity:.8;margin-top:3px}
.nav-links{display:flex;align-items:center;gap:6px;list-style:none}
.nav-links a{color:rgba(255,255,255,.92);font-weight:600;font-size:.95rem;padding:10px 16px;border-radius:10px;transition:background .2s,color .2s;position:relative}
.nav.scrolled .nav-links a,.nav.solid .nav-links a{color:var(--ink)}
.nav-links a:hover{background:rgba(255,255,255,.14)}
.nav.scrolled .nav-links a:hover,.nav.solid .nav-links a:hover{background:var(--bg-soft);color:var(--blue)}
.nav-links a.active{color:#fff;background:rgba(255,255,255,.18)}
.nav.scrolled .nav-links a.active,.nav.solid .nav-links a.active{color:var(--blue);background:var(--bg-soft)}
.nav-right{display:flex;align-items:center;gap:14px}
.lang-toggle{display:flex;border:1.5px solid rgba(255,255,255,.45);border-radius:50px;overflow:hidden;font-size:.8rem;font-weight:800}
.nav.scrolled .lang-toggle,.nav.solid .lang-toggle{border-color:var(--line)}
.lang-toggle button{background:transparent;border:none;color:#fff;padding:7px 13px;cursor:pointer;letter-spacing:.04em;transition:.2s}
.nav.scrolled .lang-toggle button,.nav.solid .lang-toggle button{color:var(--muted)}
.lang-toggle button.on{background:#fff;color:var(--blue)}
.nav.scrolled .lang-toggle button.on,.nav.solid .lang-toggle button.on{background:var(--blue);color:#fff}
.nav .btn-primary{padding:11px 22px;font-size:.9rem}
.burger{display:none;background:none;border:none;cursor:pointer;width:30px;height:24px;position:relative}
.burger span{position:absolute;left:0;width:100%;height:3px;border-radius:3px;background:#fff;transition:.3s}
.nav.scrolled .burger span,.nav.solid .burger span{background:var(--navy)}
.burger span:nth-child(1){top:0}.burger span:nth-child(2){top:10px}.burger span:nth-child(3){top:20px}
.burger.open span:nth-child(1){top:10px;transform:rotate(45deg)}
.burger.open span:nth-child(2){opacity:0}
.burger.open span:nth-child(3){top:10px;transform:rotate(-45deg)}
.hero{position:relative;min-height:100vh;display:flex;align-items:center;background:linear-gradient(180deg,rgba(7,18,33,.86),rgba(8,24,46,.82)),var(--navy);overflow:hidden}
.hero-bg{position:absolute;inset:0;z-index:0}
.hero-bg img{width:100%;height:100%;object-fit:cover;opacity:.42;transform:scale(1.05);animation:slowzoom 18s ease-in-out infinite alternate}
@keyframes slowzoom{to{transform:scale(1.16)}}
.hero::after{content:"";position:absolute;inset:0;z-index:1;background:radial-gradient(900px 500px at 75% 20%,rgba(39,163,242,.22),transparent 60%)}
.hero .container{position:relative;z-index:3;padding-top:120px;padding-bottom:60px}
.hero-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:50px;align-items:center}
.hero h1{color:#fff;margin:20px 0}
.hero h1 .grad{background:linear-gradient(120deg,#7ec8ff,#27a3f2);-webkit-background-clip:text;background-clip:text;color:transparent}
.hero .lead{color:rgba(231,240,250,.86);max-width:560px}
.hero .eyebrow{color:#8fd0ff}
.hero .eyebrow::before{background:linear-gradient(90deg,#8fd0ff,transparent)}
.hero-cta{display:flex;gap:16px;flex-wrap:wrap;margin-top:34px}
.hero-stats{display:flex;gap:14px;flex-wrap:wrap;margin-top:48px}
.hstat{background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.12);border-radius:14px;padding:18px 22px;backdrop-filter:blur(8px);min-width:130px}
.hstat b{display:block;font-size:1.9rem;font-weight:900;color:#fff;line-height:1}
.hstat span{font-size:.8rem;color:rgba(231,240,250,.7);letter-spacing:.02em}
.hero-card{background:rgba(255,255,255,.07);border:1px solid rgba(255,255,255,.16);border-radius:22px;padding:30px;backdrop-filter:blur(10px);box-shadow:var(--shadow-lg)}
.hero-card h3{color:#fff;font-size:1.12rem;margin-bottom:16px}
.hero-card .svc{display:flex;align-items:center;gap:14px;padding:13px 0;border-bottom:1px solid rgba(255,255,255,.1)}
.hero-card .svc:last-child{border-bottom:none}
.hero-card .svc .ic{width:42px;height:42px;border-radius:11px;background:linear-gradient(135deg,var(--blue),var(--sky));display:grid;place-items:center;flex:none}
.hero-card .svc .ic svg{width:22px;height:22px;stroke:#fff}
.hero-card .svc div b{display:block;color:#fff;font-size:.96rem}
.hero-card .svc div span{font-size:.8rem;color:rgba(231,240,250,.7)}
.scroll-ind{position:absolute;bottom:26px;left:50%;transform:translateX(-50%);z-index:3;color:rgba(255,255,255,.6);font-size:.72rem;letter-spacing:.2em;text-transform:uppercase;display:flex;flex-direction:column;align-items:center;gap:8px}
.scroll-ind .mouse{width:24px;height:38px;border:2px solid rgba(255,255,255,.5);border-radius:14px;position:relative}
.scroll-ind .mouse::after{content:"";position:absolute;top:7px;left:50%;transform:translateX(-50%);width:4px;height:7px;background:#fff;border-radius:3px;animation:scrolldot 1.6s infinite}
@keyframes scrolldot{0%{opacity:0;top:7px}40%{opacity:1}80%{opacity:0;top:18px}}
.page-hero{position:relative;padding:160px 0 70px;color:#fff;background:linear-gradient(180deg,rgba(8,18,33,.88),rgba(10,38,69,.9)),var(--navy);overflow:hidden}
.page-hero .pbg{position:absolute;inset:0;z-index:0}
.page-hero .pbg img{width:100%;height:100%;object-fit:cover;opacity:.30}
.page-hero::after{content:"";position:absolute;inset:0;background:radial-gradient(700px 360px at 80% 0,rgba(39,163,242,.25),transparent 60%)}
.page-hero .container{position:relative;z-index:2}
.page-hero h1{color:#fff;font-size:clamp(2rem,4.4vw,3.2rem);font-weight:900}
.page-hero .lead{color:rgba(231,240,250,.85);max-width:640px;margin-top:14px}
.crumb{display:flex;gap:8px;align-items:center;font-size:.85rem;color:rgba(231,240,250,.7);margin-bottom:18px}
.crumb a:hover{color:#fff}.crumb span{opacity:.5}
.pad{padding:96px 0}
.pad-sm{padding:70px 0}
.soft{background:var(--bg-soft)}
.soft-2{background:var(--bg-soft-2)}
.navy-sec{background:linear-gradient(160deg,var(--navy),var(--navy-2));color:#fff}
.navy-sec h2,.navy-sec h3{color:#fff}
.navy-sec .lead{color:rgba(231,240,250,.8)}
.statband{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.statband .s b{font-size:clamp(2.2rem,4vw,3.2rem);font-weight:900;background:linear-gradient(120deg,var(--blue),var(--sky));-webkit-background-clip:text;background-clip:text;color:transparent;line-height:1}
.statband .s span{display:block;color:var(--muted);font-weight:600;margin-top:6px;font-size:.95rem}
.navy-sec .statband .s b{background:linear-gradient(120deg,#8fd0ff,#27a3f2);-webkit-background-clip:text;background-clip:text;color:transparent}
.navy-sec .statband .s span{color:rgba(231,240,250,.72)}
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:26px}
.grid-2{display:grid;grid-template-columns:repeat(2,1fr);gap:26px}
.grid-4{display:grid;grid-template-columns:repeat(4,1fr);gap:22px}
.card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:34px;box-shadow:var(--shadow-sm);transition:transform .35s var(--ease),box-shadow .35s var(--ease),border-color .35s;position:relative;overflow:hidden}
.card::before{content:"";position:absolute;top:0;left:0;width:100%;height:4px;background:linear-gradient(90deg,var(--blue),var(--sky));transform:scaleX(0);transform-origin:left;transition:transform .4s var(--ease)}
.card:hover{transform:translateY(-8px);box-shadow:var(--shadow);border-color:transparent}
.card:hover::before{transform:scaleX(1)}
.card .ic{width:62px;height:62px;border-radius:16px;display:grid;place-items:center;margin-bottom:22px;background:linear-gradient(135deg,rgba(10,77,162,.1),rgba(39,163,242,.16))}
.card .ic svg{width:30px;height:30px;stroke:var(--blue);fill:none;stroke-width:1.7}
.card h3{font-size:1.28rem;margin-bottom:12px}
.card p{color:var(--muted);font-size:.97rem}
.card .tags{display:flex;flex-wrap:wrap;gap:8px;margin-top:18px}
.tag{font-size:.78rem;font-weight:600;color:var(--blue);background:rgba(10,77,162,.08);padding:6px 12px;border-radius:50px}
.card-link{display:inline-flex;align-items:center;gap:7px;margin-top:20px;color:var(--blue);font-weight:700;font-size:.92rem}
.card-link svg{width:16px;height:16px;transition:transform .25s}
.card:hover .card-link svg{transform:translateX(5px)}
.split{display:grid;grid-template-columns:1fr 1fr;gap:54px;align-items:center}
.split.rev .split-media{order:2}
.split-media{border-radius:20px;overflow:hidden;box-shadow:var(--shadow);position:relative}
.split-media img{width:100%;height:100%;object-fit:cover;min-height:340px}
@media(min-width:901px){.split.media-lg{grid-template-columns:1.3fr 1fr}}
.split.media-lg .split-media img{min-height:480px}
.split-media .badge{position:absolute;left:20px;bottom:20px;background:rgba(255,255,255,.95);border-radius:12px;padding:12px 18px;box-shadow:var(--shadow-sm);backdrop-filter:blur(6px)}
.split-media .badge b{display:block;color:var(--blue);font-size:1.4rem;font-weight:900;line-height:1}
.split-media .badge span{font-size:.78rem;color:var(--muted)}
.ticks{list-style:none;margin-top:22px;display:grid;gap:14px}
.ticks li{display:flex;gap:13px;align-items:flex-start;font-size:1rem}
.ticks li .tk{flex:none;width:26px;height:26px;border-radius:50%;background:linear-gradient(135deg,var(--blue),var(--sky));display:grid;place-items:center;margin-top:2px}
.ticks li .tk svg{width:14px;height:14px;stroke:#fff;stroke-width:3;fill:none}
.ticks li b{color:var(--ink)} .ticks li span{color:var(--muted)}
.disc-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.disc{display:flex;gap:16px;align-items:flex-start;background:#fff;border:1px solid var(--line);border-radius:14px;padding:22px;transition:.3s;box-shadow:var(--shadow-sm)}
.disc:hover{transform:translateY(-5px);box-shadow:var(--shadow);border-color:transparent}
.disc .ic{width:48px;height:48px;flex:none;border-radius:12px;background:linear-gradient(135deg,rgba(10,77,162,.1),rgba(39,163,242,.16));display:grid;place-items:center}
.disc .ic svg{width:24px;height:24px;stroke:var(--blue);fill:none;stroke-width:1.7}
.disc h4{font-size:1.04rem;margin-bottom:5px}
.disc p{font-size:.88rem;color:var(--muted);margin:0}
.filters{display:flex;flex-wrap:wrap;gap:10px;justify-content:center;margin-bottom:40px}
.filters button{border:1.5px solid var(--line);background:#fff;color:var(--muted);font-weight:700;font-size:.9rem;padding:10px 20px;border-radius:50px;cursor:pointer;transition:.25s}
.filters button:hover{border-color:var(--blue);color:var(--blue)}
.filters button.on{background:var(--blue);border-color:var(--blue);color:#fff;box-shadow:0 10px 24px rgba(21,101,192,.3)}
.proj-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:26px}
.proj{border-radius:var(--radius);overflow:hidden;background:#fff;border:1px solid var(--line);box-shadow:var(--shadow-sm);transition:transform .4s var(--ease),box-shadow .4s var(--ease);display:flex;flex-direction:column}
.proj:hover{transform:translateY(-8px);box-shadow:var(--shadow-lg)}
.proj-img{position:relative;aspect-ratio:16/10;overflow:hidden}
.proj-img img{width:100%;height:100%;object-fit:cover;transition:transform .6s var(--ease)}
.proj:hover .proj-img img{transform:scale(1.08)}
.proj-img .cat{position:absolute;top:14px;left:14px;background:rgba(10,77,162,.92);color:#fff;font-size:.72rem;font-weight:700;letter-spacing:.04em;padding:6px 13px;border-radius:50px;backdrop-filter:blur(4px)}
.proj-body{padding:24px;flex:1;display:flex;flex-direction:column}
.proj-body h3{font-size:1.12rem;line-height:1.3;margin-bottom:10px}
.proj-scope{color:var(--muted);font-size:.9rem;margin-bottom:8px}
.proj-owner{display:flex;align-items:center;gap:8px;color:var(--muted);font-size:.88rem;margin-top:auto;padding-top:14px;border-top:1px solid var(--line)}
.proj-owner svg{width:16px;height:16px;stroke:var(--blue);fill:none}
.proj-owner b{color:var(--ink);font-weight:700}
.client-grid{display:grid;grid-template-columns:repeat(6,1fr);gap:18px}
.client{background:#fff;border:1px solid var(--line);border-radius:14px;height:120px;display:grid;place-items:center;padding:20px;transition:.3s;box-shadow:var(--shadow-sm)}
.client:hover{transform:translateY(-5px);box-shadow:var(--shadow);border-color:rgba(10,77,162,.35)}
.client img{max-height:64px;max-width:100%;width:auto;object-fit:contain;transition:transform .35s}
.client:hover img{transform:scale(1.06)}
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.step{position:relative;padding-top:18px}
.step .num{font-size:3rem;font-weight:900;color:rgba(10,77,162,.12);line-height:1;letter-spacing:-.04em}
.navy-sec .step .num{color:rgba(143,208,255,.18)}
.step h4{margin:6px 0 10px;font-size:1.18rem}
.step p{color:var(--muted);font-size:.94rem}
.navy-sec .step p{color:rgba(231,240,250,.75)}
.value{text-align:center;padding:30px}
.value .ic{width:70px;height:70px;border-radius:18px;margin:0 auto 18px;background:linear-gradient(135deg,var(--blue),var(--sky));display:grid;place-items:center;box-shadow:0 14px 30px rgba(21,101,192,.32)}
.value .ic svg{width:34px;height:34px;stroke:#fff;fill:none;stroke-width:1.7}
.value h3{font-size:1.2rem;margin-bottom:8px}
.value p{color:var(--muted);font-size:.95rem}
.cta{position:relative;overflow:hidden;border-radius:26px;padding:64px 56px;background:linear-gradient(120deg,var(--blue),var(--navy-2));color:#fff;text-align:center;box-shadow:var(--shadow-lg)}
.cta::after{content:"";position:absolute;inset:0;background:radial-gradient(600px 300px at 20% 0,rgba(39,163,242,.4),transparent 60%)}
.cta>*{position:relative;z-index:1}
.cta h2{color:#fff;font-size:clamp(1.7rem,3.4vw,2.6rem)}
.cta p{color:rgba(231,240,250,.85);max-width:560px;margin:14px auto 30px}
.cta .hero-cta{justify-content:center}
.tl{position:relative;max-width:760px;margin:0 auto;counter-reset:tl;padding-left:40px}
.tl::before{content:"";position:absolute;left:21px;top:12px;bottom:12px;width:3px;border-radius:3px;background:linear-gradient(180deg,var(--blue),var(--sky))}
.tl-item{position:relative;counter-increment:tl;padding:2px 0 34px 26px}
.tl-item:last-child{padding-bottom:0}
.tl-item::before{content:counter(tl,decimal-leading-zero);position:absolute;left:-40px;top:-4px;width:44px;height:44px;border-radius:50%;background:linear-gradient(135deg,var(--blue),var(--sky));color:#fff;font-weight:800;font-size:.95rem;display:grid;place-items:center;box-shadow:0 0 0 5px var(--bg,#fff),0 6px 16px rgba(10,77,162,.22)}
.tl-item h4{font-size:1.12rem;color:var(--blue);margin:0}
.tl-item p{color:var(--muted);margin-top:5px;line-height:1.7}
.contact-grid{display:grid;grid-template-columns:1fr 1.15fr;gap:46px;align-items:start}
.cinfo{display:grid;gap:18px}
.cinfo .row{display:flex;gap:16px;align-items:flex-start;background:#fff;border:1px solid var(--line);border-radius:14px;padding:22px;box-shadow:var(--shadow-sm)}
.cinfo .row .ic{width:48px;height:48px;flex:none;border-radius:12px;background:linear-gradient(135deg,var(--blue),var(--sky));display:grid;place-items:center}
.cinfo .row .ic svg{width:23px;height:23px;stroke:#fff;fill:none;stroke-width:1.8}
.cinfo .row b{display:block;font-size:.78rem;letter-spacing:.1em;text-transform:uppercase;color:var(--muted);margin-bottom:4px}
.cinfo .row p,.cinfo .row a{font-size:1rem;color:var(--ink);font-weight:600;word-break:break-word}
.cinfo .row a:hover{color:var(--blue)}
.form{background:#fff;border:1px solid var(--line);border-radius:20px;padding:36px;box-shadow:var(--shadow)}
.form h3{font-size:1.4rem;margin-bottom:6px}
.form p.sub{color:var(--muted);margin-bottom:24px;font-size:.95rem}
.field{margin-bottom:18px}
.field label{display:block;font-size:.85rem;font-weight:700;margin-bottom:7px;color:var(--ink)}
.field input,.field textarea,.field select{width:100%;padding:13px 16px;border:1.5px solid var(--line);border-radius:11px;font-family:inherit;font-size:.96rem;transition:.2s;background:var(--bg-soft);color:var(--ink)}
.field input:focus,.field textarea:focus,.field select:focus{outline:none;border-color:var(--blue);background:#fff;box-shadow:0 0 0 4px rgba(10,77,162,.1)}
.field textarea{resize:vertical;min-height:120px}
.form-row{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.form-note{font-size:.82rem;color:var(--muted);margin-top:14px;text-align:center}
.map-wrap{border-radius:20px;overflow:hidden;box-shadow:var(--shadow);border:1px solid var(--line);margin-top:30px}
.map-wrap iframe{width:100%;height:340px;border:0;display:block}
.form-ok,.form-err{display:none;border-radius:11px;padding:16px;text-align:center;font-weight:700;margin-bottom:18px}
.form-ok{background:rgba(10,77,162,.08);border:1px solid rgba(10,77,162,.2);color:var(--blue)}
.form-err{background:rgba(214,40,40,.08);border:1px solid rgba(214,40,40,.25);color:#c62828}
.form-ok.show,.form-err.show{display:block}
.footer{background:var(--navy);color:rgba(231,240,250,.72);padding:70px 0 28px}
.foot-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:40px;margin-bottom:46px}
.footer .brand{color:#fff;margin-bottom:18px}
.footer .brand-txt span{opacity:.7}
.foot-about{font-size:.93rem;line-height:1.8;max-width:320px}
.foot-col h4{color:#fff;font-size:1rem;margin-bottom:18px;font-weight:800}
.foot-col ul{list-style:none;display:grid;gap:11px}
.foot-col a,.foot-col li{font-size:.92rem;transition:.2s}
.foot-col a:hover{color:#fff;padding-left:4px}
.foot-contact li{display:flex;gap:11px;align-items:flex-start}
.foot-contact svg{width:17px;height:17px;stroke:var(--sky);fill:none;flex:none;margin-top:3px}
.foot-bottom{border-top:1px solid rgba(255,255,255,.1);padding-top:24px;display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:14px;font-size:.85rem}
.foot-bottom .tagline{color:var(--sky);font-weight:800;letter-spacing:.04em}
.reveal{opacity:0;transform:translateY(34px);transition:opacity .8s var(--ease),transform .8s var(--ease)}
.reveal.in{opacity:1;transform:none}
.reveal.d1{transition-delay:.08s}.reveal.d2{transition-delay:.16s}.reveal.d3{transition-delay:.24s}.reveal.d4{transition-delay:.32s}.reveal.d5{transition-delay:.4s}
[data-when]{display:none}
body[data-lang="en"] [data-when="en"]{display:revert}
body[data-lang="th"] [data-when="th"]{display:revert}
@media(max-width:1024px){
  .hero-grid{grid-template-columns:1fr;gap:36px}
  .hero-card{max-width:520px}
  .grid-4,.statband,.steps{grid-template-columns:repeat(2,1fr)}
  .client-grid{grid-template-columns:repeat(4,1fr)}
  .disc-grid{grid-template-columns:repeat(2,1fr)}
}
@media(max-width:820px){
  .nav-links,.nav .btn-primary{display:none}
  .burger{display:block}
  .nav-links.mobile{display:flex;flex-direction:column;position:fixed;top:0;right:0;height:100vh;width:min(82vw,330px);background:var(--navy);padding:96px 28px 28px;gap:6px;z-index:999;box-shadow:-20px 0 60px rgba(0,0,0,.4);transform:translateX(100%);transition:transform .4s var(--ease);align-items:stretch}
  .nav-links.mobile.open{transform:none}
  .nav-links.mobile a{color:#fff;font-size:1.05rem;padding:14px 16px}
  .nav-links.mobile a.active{background:rgba(255,255,255,.12)}
  .grid-3,.grid-2,.proj-grid,.disc-grid{grid-template-columns:1fr}
  .split,.contact-grid{grid-template-columns:1fr;gap:32px}
  .split.rev .split-media{order:0}
  .pad{padding:64px 0}
  .cta{padding:44px 26px}
  .foot-grid{grid-template-columns:1fr 1fr;gap:30px}
}
@media(max-width:520px){
  .statband,.grid-4,.steps,.client-grid,.foot-grid{grid-template-columns:1fr 1fr}
  .form-row{grid-template-columns:1fr}
  .hero-stats{gap:10px}.hstat{min-width:0;flex:1;padding:14px}
  .container{padding:0 18px}
}
.nav-overlay{position:fixed;inset:0;background:rgba(5,12,22,.5);z-index:998;opacity:0;pointer-events:none;transition:.3s}
.nav-overlay.show{opacity:1;pointer-events:auto}

/* ===== Article / Knowledge ===== */
.prose{max-width:840px;margin:0 auto}
.prose>p{margin-bottom:16px;color:#33485c;font-size:1.03rem}
.prose h3{font-size:1.5rem;margin:36px 0 12px;color:var(--navy)}
.prose h4{font-size:1.14rem;margin:26px 0 8px;color:var(--blue)}
.prose ul{margin:6px 0 18px 4px;display:grid;gap:9px;list-style:none}
.prose ul li{position:relative;padding-left:26px;color:#33485c;font-size:1rem}
.prose ul li::before{content:"";position:absolute;left:2px;top:9px;width:9px;height:9px;border-radius:50%;background:linear-gradient(135deg,var(--blue),var(--sky))}
.prose strong{color:var(--ink)}
body[data-lang="th"] .prose>p,body[data-lang="th"] .prose ul li{line-height:1.95}
.infobox{background:var(--bg-soft);border-left:4px solid var(--blue);border-radius:0 12px 12px 0;padding:18px 22px;margin:22px 0}
.infobox b{color:var(--blue)}
.infobox p{margin:0;color:#33485c;font-size:.97rem}
.formula{background:linear-gradient(160deg,var(--navy),var(--navy-2));color:#dbeafe;border-radius:12px;padding:18px 22px;margin:20px 0;font-family:ui-monospace,Menlo,Consolas,monospace;font-size:.96rem;overflow-x:auto;line-height:1.7}
.formula .v{color:#8fd0ff}
.formula small{display:block;margin-top:8px;color:#9fb6cf;font-family:var(--ff);font-size:.82rem}
.ktable{width:100%;border-collapse:collapse;margin:20px 0;font-size:.93rem}
.ktable th,.ktable td{border:1px solid var(--line);padding:11px 14px;text-align:left;vertical-align:top}
.ktable th{background:var(--bg-soft);color:var(--navy);font-weight:800}
.ktable tr:nth-child(even) td{background:#fafcfe}
.disclaimer{max-width:840px;margin:30px auto 0;font-size:.84rem;color:var(--muted);border-top:1px solid var(--line);padding-top:18px}

/* in-page discipline tabs */
.ktabs{display:flex;flex-wrap:wrap;gap:10px;justify-content:center;margin-bottom:44px}
.ktabs button{border:1.5px solid var(--line);background:#fff;color:var(--muted);font-weight:700;font-size:.95rem;padding:12px 22px;border-radius:50px;cursor:pointer;transition:.25s;display:inline-flex;align-items:center;gap:9px}
.ktabs button svg{width:18px;height:18px;stroke:currentColor;fill:none;stroke-width:1.8}
.ktabs button:hover{border-color:var(--blue);color:var(--blue)}
.ktabs button.on{background:var(--blue);border-color:var(--blue);color:#fff;box-shadow:0 10px 24px rgba(21,101,192,.3)}
.kpanel{display:none}
.kpanel.on{display:block;animation:kfade .45s var(--ease)}
@keyframes kfade{from{opacity:0;transform:translateY(12px)}to{opacity:1;transform:none}}

/* ===== Safety ===== */
.haz{display:flex;gap:15px;align-items:flex-start;background:#fff;border:1px solid var(--line);border-radius:14px;padding:22px;box-shadow:var(--shadow-sm);transition:.3s;height:100%}
.haz:hover{transform:translateY(-5px);box-shadow:var(--shadow);border-color:transparent}
.haz .ic{flex:none;width:46px;height:46px;border-radius:12px;background:linear-gradient(135deg,rgba(10,77,162,.1),rgba(39,163,242,.16));display:grid;place-items:center}
.haz .ic svg{width:24px;height:24px;stroke:var(--blue);fill:none;stroke-width:1.7}
.haz h4{font-size:1.05rem;margin-bottom:5px}
.haz p{font-size:.9rem;color:var(--muted);margin:0}
.pill-row{display:flex;flex-wrap:wrap;gap:10px;justify-content:center;margin-top:8px}
.pill{display:inline-flex;align-items:center;gap:8px;background:#fff;border:1px solid var(--line);border-radius:50px;padding:10px 18px;font-weight:600;font-size:.92rem;color:var(--ink);box-shadow:var(--shadow-sm)}
.pill svg{width:16px;height:16px;stroke:var(--blue);fill:none;stroke-width:2}

/* ===== Accordion (click to expand) ===== */
.acc{max-width:940px;margin:0 auto;display:grid;gap:14px}
.acc details{background:#fff;border:1px solid var(--line);border-radius:14px;box-shadow:var(--shadow-sm);overflow:hidden;transition:box-shadow .3s,border-color .3s}
.acc details[open]{box-shadow:var(--shadow);border-color:rgba(10,77,162,.3)}
.acc summary{list-style:none;cursor:pointer;padding:20px 24px;display:flex;align-items:center;gap:16px;font-weight:800;color:var(--navy);font-size:1.06rem}
.acc summary::-webkit-details-marker{display:none}
.acc summary .ic{flex:none;width:46px;height:46px;border-radius:12px;background:linear-gradient(135deg,rgba(10,77,162,.1),rgba(39,163,242,.16));display:grid;place-items:center}
.acc summary .ic svg{width:24px;height:24px;stroke:var(--blue);fill:none;stroke-width:1.7}
.acc summary .chev{margin-left:auto;flex:none;width:22px;height:22px;transition:transform .3s;stroke:var(--blue);fill:none;stroke-width:2.4}
.acc details[open] summary .chev{transform:rotate(180deg)}
.acc summary:hover{color:var(--blue)}
.acc .acc-body{padding:4px 26px 26px 86px;animation:kfade .35s var(--ease)}
.acc .acc-body p{color:#33485c;margin-bottom:12px;font-size:.98rem}
.acc .acc-body h5{font-size:.82rem;color:var(--blue);margin:16px 0 8px;letter-spacing:.08em;text-transform:uppercase;font-weight:800}
.acc .acc-body ul{list-style:none;display:grid;gap:9px;margin:0}
.acc .acc-body ul li{position:relative;padding-left:24px;color:#33485c;font-size:.97rem}
.acc .acc-body ul li::before{content:"";position:absolute;left:2px;top:9px;width:8px;height:8px;border-radius:50%;background:linear-gradient(135deg,var(--blue),var(--sky))}
.acc .acc-body ol{margin:0 0 0 20px;display:grid;gap:8px}
.acc .acc-body ol li{color:#33485c;font-size:.97rem;padding-left:4px}
.acc .ref{font-size:.85rem;color:var(--muted);margin-top:14px;border-top:1px solid var(--line);padding-top:12px}
body[data-lang="th"] .acc .acc-body p,body[data-lang="th"] .acc .acc-body li{line-height:1.95}
@media(max-width:560px){.acc .acc-body{padding:0 20px 22px 20px}}

/* ===== Worked example / calculation box ===== */
.example{background:#fff;border:1px solid var(--line);border-left:5px solid var(--blue);border-radius:0 12px 12px 0;padding:18px 22px 18px 24px;margin:22px 0}
.example .xt{display:inline-block;background:var(--blue);color:#fff;font-size:.7rem;font-weight:800;letter-spacing:.1em;text-transform:uppercase;padding:4px 12px;border-radius:50px;margin-bottom:12px}
.example p{margin-bottom:8px;color:#33485c;font-size:.96rem}
.example .calc{font-family:ui-monospace,Menlo,Consolas,monospace;font-size:.88rem;background:var(--bg-soft);border-radius:8px;padding:13px 15px;margin:10px 0;overflow-x:auto;color:var(--navy);line-height:1.75}
.example .calc .v{color:var(--blue);font-weight:700}
.subnav{display:flex;flex-wrap:wrap;gap:8px;margin:6px 0 24px}
.subnav a{font-size:.82rem;font-weight:700;color:var(--blue);background:rgba(10,77,162,.08);padding:7px 14px;border-radius:50px;transition:.2s}
.subnav a:hover{background:var(--blue);color:#fff}

/* ===== Safety detail page ===== */
.backlink{display:inline-flex;align-items:center;gap:8px;color:var(--blue);font-weight:700;font-size:.92rem;margin-bottom:8px}
.backlink svg{width:16px;height:16px;stroke:currentColor;fill:none;stroke-width:2.2;transition:transform .2s}
.backlink:hover svg{transform:translateX(-4px)}
.related{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;max-width:940px;margin:0 auto}
.related a{display:flex;align-items:center;gap:12px;background:#fff;border:1px solid var(--line);border-radius:12px;padding:16px 18px;box-shadow:var(--shadow-sm);transition:.25s;font-weight:700;color:var(--navy);font-size:.95rem}
.related a:hover{transform:translateY(-4px);box-shadow:var(--shadow);border-color:rgba(10,77,162,.35);color:var(--blue)}
.related a .ic{flex:none;width:38px;height:38px;border-radius:10px;background:linear-gradient(135deg,rgba(10,77,162,.1),rgba(39,163,242,.16));display:grid;place-items:center}
.related a .ic svg{width:20px;height:20px;stroke:var(--blue);fill:none;stroke-width:1.8}
.roles{width:100%;border-collapse:collapse;margin:8px 0 4px}
.roles th,.roles td{border:1px solid var(--line);padding:11px 14px;text-align:left;font-size:.95rem;vertical-align:top}
.roles th{background:var(--bg-soft);color:var(--navy);font-weight:800;white-space:nowrap}
@media(max-width:760px){.related{grid-template-columns:1fr}}

/* ===== Knowledge: TL;DR + vertical calc sheet ===== */
.tldr{background:linear-gradient(135deg,rgba(10,77,162,.07),rgba(39,163,242,.10));border:1px solid rgba(10,77,162,.20);border-left:4px solid var(--blue);border-radius:0 14px 14px 0;padding:18px 22px;margin:0 0 28px}
.tldr b{display:block;color:var(--blue);font-size:.76rem;letter-spacing:.1em;text-transform:uppercase;margin-bottom:8px;font-weight:800}
.tldr p{margin:0 0 6px;color:var(--ink);font-size:1.01rem;counter-reset:tl}
.tldr p:last-child{margin-bottom:0}
.tldr .tldr-line{display:block;position:relative;padding:0 0 0 26px;margin:6px 0;line-height:1.5}
.tldr .tldr-line:before{counter-increment:tl;content:counter(tl) ".";position:absolute;left:0;top:0;width:auto;height:auto;background:none;border:0;box-shadow:none;border-radius:0;color:var(--blue);font-weight:800;font-size:.95em}
.tldr .tldr-line:first-child{margin-top:0}
body[data-lang="th"] .tldr .tldr-line{line-height:1.65}
.calcsheet{background:var(--bg-soft);border:1px solid var(--line);border-radius:12px;padding:20px 22px;margin:18px 0;font-family:ui-monospace,Menlo,Consolas,monospace;font-size:.9rem;color:#33485c;line-height:1.85;overflow-x:auto}
.calcsheet .lbl{display:block;color:var(--blue);font-weight:800;margin:14px 0 4px;font-family:var(--ff);font-size:.8rem;letter-spacing:.06em;text-transform:uppercase}
.calcsheet .lbl:first-child{margin-top:0}
.calcsheet .ln{display:block;padding-left:16px}
.calcsheet .res{color:#157a45;font-weight:700}
.calcsheet .ok{color:#157a45;font-weight:700}
.calcsheet .bad{color:#c62828;font-weight:700}
.calcsheet .hl{color:#b45309;font-weight:700}
body[data-lang="th"] .tldr p{line-height:1.85}

/* ===== Knowledge: flowchart, selector, glossary, download ===== */
.flowchart{background:#fff;border:1px solid var(--line);border-radius:16px;padding:20px;box-shadow:var(--shadow-sm);margin:18px 0;overflow-x:auto}
.flowchart svg{display:block;margin:0 auto;max-width:100%;height:auto}
.flow{display:grid;gap:14px;max-width:700px;margin:0 auto}
.flow .node{display:flex;align-items:center;gap:12px;border-radius:12px;padding:14px 18px;font-weight:800;font-size:.98rem}
.flow .q{background:linear-gradient(135deg,var(--blue),var(--sky));color:#fff}
.flow .branch{display:grid;gap:10px;padding-left:24px;border-left:2px dashed rgba(10,77,162,.35);margin-left:16px}
.flow .arm{display:flex;align-items:center;gap:12px;flex-wrap:wrap}
.flow .cond{flex:none;min-width:130px;font-weight:700;color:var(--blue);font-size:.88rem}
.flow .res{background:#fff;border:1px solid var(--line);border-radius:10px;padding:9px 14px;font-weight:700;color:var(--navy);box-shadow:var(--shadow-sm);font-size:.93rem}
.flow .res.alt{background:var(--bg-soft)}
.flow .modi{background:rgba(10,77,162,.06);border:1px dashed rgba(10,77,162,.3);border-radius:10px;padding:12px 16px;font-size:.9rem;color:#33485c}
@media(max-width:560px){.flow .cond{min-width:0}}
.selector{background:#fff;border:1px solid var(--line);border-radius:16px;padding:24px;box-shadow:var(--shadow-sm);margin:18px 0}
.selector .row{display:grid;grid-template-columns:repeat(2,1fr);gap:14px;margin-bottom:14px}
.selector label{display:block;font-size:.8rem;font-weight:800;color:var(--ink);margin-bottom:6px;letter-spacing:.02em}
.selector select{width:100%;padding:11px 14px;border:1.5px solid var(--line);border-radius:10px;background:var(--bg-soft);font-family:inherit;font-size:.95rem;color:var(--ink)}
.selector select:focus{outline:none;border-color:var(--blue);background:#fff}
.selector .out{margin-top:8px;background:linear-gradient(135deg,rgba(10,77,162,.07),rgba(39,163,242,.10));border:1px solid rgba(10,77,162,.2);border-radius:12px;padding:18px 20px;font-size:1rem;color:var(--ink);line-height:1.7}
.selector .out b{color:var(--blue)}
.selector .out .pick{font-size:1.12rem;font-weight:800;color:var(--navy);display:block;margin-bottom:6px}
.dl-card{display:flex;align-items:center;gap:16px;background:#fff;border:1px solid var(--line);border-radius:14px;padding:18px 22px;box-shadow:var(--shadow-sm);margin:18px 0;transition:.25s}
.dl-card:hover{box-shadow:var(--shadow);border-color:rgba(10,77,162,.35)}
.dl-card .ic{flex:none;width:46px;height:46px;border-radius:12px;background:linear-gradient(135deg,var(--blue),var(--sky));display:grid;place-items:center}
.dl-card .ic svg{width:24px;height:24px;stroke:#fff;fill:none;stroke-width:1.8}
.dl-card b{display:block;color:var(--navy);font-size:1rem}
.dl-card span{font-size:.88rem;color:var(--muted)}
.dl-card .go{margin-left:auto;color:var(--blue);font-weight:800;font-size:.9rem;white-space:nowrap}
.glossary{display:grid;gap:0;margin:8px 0;border:1px solid var(--line);border-radius:12px;overflow:hidden}
.glossary div{display:grid;grid-template-columns:140px 1fr;gap:14px;padding:11px 16px;font-size:.95rem;border-bottom:1px solid var(--line)}
.glossary div:last-child{border-bottom:none}
.glossary div:nth-child(even){background:var(--bg-soft)}
.glossary .term{font-weight:800;color:var(--navy)}
.glossary .def{color:#33485c}
@media(max-width:560px){.selector .row{grid-template-columns:1fr}.glossary div{grid-template-columns:96px 1fr;gap:10px}}
/* ---- interactive calculator ---- */
.calc-tool{background:#fff;border:1px solid var(--line);border-radius:16px;padding:24px;box-shadow:var(--shadow-sm);margin:18px 0}
.calc-tool .ct-head{display:flex;align-items:center;gap:10px;font-weight:800;color:var(--navy);font-size:1.02rem;margin-bottom:4px}
.calc-tool .ct-head svg{width:22px;height:22px;stroke:var(--blue);fill:none;stroke-width:1.9}
.calc-tool .ct-sub{font-size:.86rem;color:var(--muted);margin-bottom:16px}
.calc-tool .grid{display:grid;grid-template-columns:repeat(2,1fr);gap:14px}
.calc-tool label{display:block;font-size:.78rem;font-weight:800;color:var(--ink);margin-bottom:6px;letter-spacing:.02em}
.calc-tool input,.calc-tool select{width:100%;padding:11px 13px;border:1.5px solid var(--line);border-radius:10px;background:var(--bg-soft);font-family:inherit;font-size:.95rem;color:var(--ink);box-sizing:border-box}
.calc-tool input:focus,.calc-tool select:focus{outline:none;border-color:var(--blue);background:#fff}
.calc-tool .out{margin-top:16px;background:linear-gradient(135deg,rgba(10,77,162,.07),rgba(39,163,242,.10));border:1px solid rgba(10,77,162,.2);border-radius:12px;padding:18px 20px;font-size:.98rem;color:var(--ink);line-height:1.85}
.calc-tool .out .pick{font-size:1.14rem;font-weight:800;color:var(--navy);display:block;margin-bottom:8px}
.calc-tool .out .step{display:block;font-family:ui-monospace,Menlo,Consolas,monospace;font-size:.88rem;color:#33485c}
.calc-tool .out b{color:var(--blue)}
.calc-tool .out .ok{color:#157a45;font-weight:700}
.calc-tool .out .bad{color:#c62828;font-weight:700}
.calc-tool .note{font-size:.8rem;color:var(--muted);margin-top:10px;font-style:italic}
@media(max-width:560px){.calc-tool .grid{grid-template-columns:1fr}}

/* ===== Knowledge hub — bigger selection-guide layout ===== */
.kpanel .prose{max-width:1120px}
.kpanel .prose>p{font-size:1.12rem;max-width:840px}
.kpanel .prose>h4{font-size:1.22rem;color:var(--navy);font-weight:800;border-bottom:2px solid var(--line);padding-bottom:10px;margin:36px 0 18px;display:flex;align-items:center;gap:10px}
.kpanel .prose>h4::before{content:"";width:18px;height:18px;border-radius:5px;background:linear-gradient(135deg,var(--blue),var(--sky));flex:none}
.kpanel .related{grid-template-columns:repeat(3,1fr);gap:20px;margin:0 0 16px;max-width:none}
.kpanel .related a{padding:22px 24px;font-size:1.06rem;border-radius:16px;gap:16px}
.kpanel .related a .ic{width:54px;height:54px;border-radius:14px}
.kpanel .related a .ic svg{width:28px;height:28px}
.kpanel .related a::after{content:"→";margin-left:auto;color:var(--blue);font-weight:800;font-size:1.1rem;transition:transform .25s}
.kpanel .related a:hover::after{transform:translateX(5px)}
@media(max-width:900px){.kpanel .related{grid-template-columns:repeat(2,1fr)}}
@media(max-width:600px){.kpanel .related{grid-template-columns:1fr}}

/* GEO/AEO FAQ accordion */
.faq{margin:20px 0}
.faq-item{border:1px solid var(--line,#e3e8ef);border-radius:10px;margin:10px 0;background:var(--card,#fff);overflow:hidden}
.faq-item summary{cursor:pointer;font-weight:700;padding:14px 44px 14px 16px;list-style:none;position:relative}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::after{content:"+";position:absolute;right:16px;top:12px;font-size:1.3rem;font-weight:700;color:var(--brand,#0a4da2)}
.faq-item[open] summary::after{content:"\2013"}
.faq-item p{padding:0 16px 16px;margin:0;line-height:1.7}

/* TL;DR bullet list */
.tldr-list{margin:8px 0 0;padding-left:20px}
.tldr-list li{margin:4px 0;line-height:1.6}

/* Disable hover lift/zoom on touch devices (prevents sticky-hover size change on tap) */
@media (hover:none){
  .proj:hover{transform:none;box-shadow:var(--shadow-sm)}
  .proj:hover .proj-img img{transform:none}
  .card:hover{transform:none}
  .card:hover::before{transform:scaleX(0)}
  .client:hover img{transform:none}
}

a.disc{color:inherit;text-decoration:none;cursor:pointer}
a.disc h4{color:var(--ink)}