/* KT OPTIC - Shared Stylesheet */
:root{
  --navy:#0b2545;
  --blue:#13315c;
  --accent:#8da9c4;
  --gold:#c9a227;
  --bg:#f7f9fc;
  --text:#1a1a1a;
  --muted:#5a6b80;
  --white:#ffffff;
  --border:#e3e8ef;
  --radius:14px;
  --shadow:0 10px 30px rgba(11,37,69,.08);
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:'Prompt','Noto Sans Thai',system-ui,-apple-system,sans-serif;color:var(--text);background:var(--bg);line-height:1.75;font-size:16px}
img{max-width:100%;display:block;height:auto}
a{color:var(--navy);text-decoration:none;transition:.2s}
a:hover{color:var(--gold)}
.container{max-width:1200px;margin:0 auto;padding:0 20px}

/* Header */
.topbar{background:var(--navy);color:#dbe7f3;font-size:14px;padding:8px 0}
.topbar .container{display:flex;justify-content:space-between;flex-wrap:wrap;gap:10px}
.topbar a{color:#dbe7f3}
header.site-header{background:var(--white);box-shadow:0 2px 10px rgba(0,0,0,.05);position:sticky;top:0;z-index:100}
.nav{display:flex;align-items:center;justify-content:space-between;padding:16px 0}
.logo{display:flex;align-items:center;gap:12px;font-weight:700;font-size:22px;color:var(--navy)}
.logo-mark{width:44px;height:44px;border-radius:50%;background:linear-gradient(135deg,var(--navy),var(--blue));color:#fff;display:grid;place-items:center;font-weight:800;letter-spacing:1px}
.logo small{display:block;font-size:11px;color:var(--muted);font-weight:400;letter-spacing:2px}
nav ul{list-style:none;display:flex;gap:8px;flex-wrap:wrap}
nav ul a{padding:10px 14px;border-radius:8px;font-weight:500;color:var(--navy)}
nav ul a:hover,nav ul a.active{background:var(--navy);color:#fff}
.menu-toggle{display:none;background:none;border:none;font-size:26px;cursor:pointer;color:var(--navy)}

/* Hero */
.hero{position:relative;min-height:560px;display:flex;align-items:center;color:#fff;overflow:hidden}
.hero::before{content:"";position:absolute;inset:0;background:linear-gradient(135deg,rgba(11,37,69,.85),rgba(19,49,92,.7)),url('https://images.unsplash.com/photo-1591076482161-42ce6da69f67?auto=format&fit=crop&w=1600&q=80') center/cover}
.hero .container{position:relative;padding:80px 20px}
.hero h1{font-size:clamp(28px,5vw,52px);font-weight:700;line-height:1.25;max-width:820px;margin-bottom:20px}
.hero p{font-size:clamp(16px,2vw,20px);max-width:720px;margin-bottom:30px;color:#e6eef8}
.btn{display:inline-block;padding:14px 28px;border-radius:10px;font-weight:600;transition:.25s;cursor:pointer;border:none;font-family:inherit;font-size:16px}
.btn-primary{background:var(--gold);color:#1a1a1a}
.btn-primary:hover{background:#e0b939;transform:translateY(-2px);color:#1a1a1a}
.btn-outline{background:transparent;color:#fff;border:2px solid #fff;margin-left:10px}
.btn-outline:hover{background:#fff;color:var(--navy)}

/* Sections */
section{padding:70px 0}
.section-title{text-align:center;margin-bottom:50px}
.section-title span.eyebrow{color:var(--gold);font-weight:600;letter-spacing:3px;font-size:13px;text-transform:uppercase}
.section-title h2{font-size:clamp(26px,4vw,40px);color:var(--navy);margin:10px 0;font-weight:700}
.section-title p{color:var(--muted);max-width:720px;margin:0 auto}

/* Grid cards */
.grid{display:grid;gap:24px}
.grid-3{grid-template-columns:repeat(auto-fit,minmax(280px,1fr))}
.grid-2{grid-template-columns:repeat(auto-fit,minmax(320px,1fr))}
.grid-4{grid-template-columns:repeat(auto-fit,minmax(230px,1fr))}
.card{background:#fff;border-radius:var(--radius);box-shadow:var(--shadow);overflow:hidden;transition:.3s;border:1px solid var(--border)}
.card:hover{transform:translateY(-6px);box-shadow:0 20px 40px rgba(11,37,69,.15)}
.card img{width:100%;height:220px;object-fit:cover}
.card-body{padding:22px}
.card-body h3{color:var(--navy);font-size:20px;margin-bottom:10px;font-weight:600}
.card-body p{color:var(--muted);font-size:15px}
.card-tag{display:inline-block;padding:4px 12px;background:#eef3fa;color:var(--blue);border-radius:20px;font-size:12px;font-weight:600;margin-bottom:10px}

/* Feature icons */
.feature{text-align:center;padding:24px}
.feature-icon{width:70px;height:70px;margin:0 auto 16px;border-radius:16px;background:linear-gradient(135deg,var(--navy),var(--blue));color:#fff;display:grid;place-items:center;font-size:30px}
.feature h3{color:var(--navy);margin-bottom:10px;font-size:19px}
.feature p{color:var(--muted);font-size:15px}

/* Split section */
.split{display:grid;grid-template-columns:1fr 1fr;gap:50px;align-items:center}
.split img{border-radius:var(--radius);box-shadow:var(--shadow);width:100%;height:100%;max-height:480px;object-fit:cover}
.split h2{color:var(--navy);font-size:clamp(24px,3.5vw,36px);margin-bottom:18px;line-height:1.3}
.split p{color:var(--muted);margin-bottom:14px;font-size:16px}
.split ul{margin:16px 0 20px 20px;color:var(--text)}
.split ul li{margin-bottom:8px}

/* Gallery */
.gallery{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:14px}
.gallery img{border-radius:10px;height:200px;object-fit:cover;transition:.3s;cursor:pointer}
.gallery img:hover{transform:scale(1.03);box-shadow:var(--shadow)}

/* Stats */
.stats{background:var(--navy);color:#fff;padding:60px 0}
.stats .grid{grid-template-columns:repeat(auto-fit,minmax(180px,1fr));text-align:center}
.stat-num{font-size:44px;font-weight:800;color:var(--gold);line-height:1}
.stat-label{margin-top:8px;color:#c7d5e6;font-size:15px}

/* Article */
article.long{max-width:900px;margin:0 auto;background:#fff;padding:50px;border-radius:var(--radius);box-shadow:var(--shadow)}
article.long h2{color:var(--navy);margin:36px 0 14px;font-size:28px;font-weight:700;padding-bottom:10px;border-bottom:3px solid var(--gold)}
article.long h3{color:var(--blue);margin:24px 0 10px;font-size:21px;font-weight:600}
article.long p{margin-bottom:16px;color:#333;text-align:justify}
article.long ul,article.long ol{margin:12px 0 20px 28px;color:#333}
article.long li{margin-bottom:8px}
article.long blockquote{border-left:4px solid var(--gold);padding:14px 20px;background:#fdf7e5;margin:20px 0;color:#5a4b1a;font-style:italic;border-radius:0 8px 8px 0}
article.long img{border-radius:var(--radius);margin:24px 0;box-shadow:var(--shadow)}

/* Page hero smaller */
.page-hero{background:linear-gradient(135deg,var(--navy),var(--blue));color:#fff;padding:80px 0 60px;text-align:center}
.page-hero h1{font-size:clamp(28px,4.5vw,44px);margin-bottom:12px}
.page-hero p{color:#c7d5e6;max-width:700px;margin:0 auto}
.breadcrumb{color:#c7d5e6;font-size:14px;margin-top:14px}
.breadcrumb a{color:var(--gold)}

/* Contact */
.contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:40px}
.contact-info{background:#fff;padding:36px;border-radius:var(--radius);box-shadow:var(--shadow)}
.contact-info h3{color:var(--navy);margin-bottom:20px;font-size:22px}
.contact-item{display:flex;gap:14px;margin-bottom:18px;align-items:flex-start}
.contact-item .icon{width:44px;height:44px;border-radius:50%;background:#eef3fa;color:var(--navy);display:grid;place-items:center;font-size:20px;flex-shrink:0}
.contact-item strong{color:var(--navy);display:block;margin-bottom:4px}
.contact-item span{color:var(--muted);font-size:15px}
.form-group{margin-bottom:18px}
.form-group label{display:block;margin-bottom:6px;font-weight:500;color:var(--navy)}
.form-group input,.form-group textarea,.form-group select{width:100%;padding:12px 14px;border:1px solid var(--border);border-radius:8px;font-family:inherit;font-size:15px;background:#fff}
.form-group input:focus,.form-group textarea:focus{outline:none;border-color:var(--navy);box-shadow:0 0 0 3px rgba(11,37,69,.1)}
.map-embed{border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow);margin-top:30px}

/* CTA */
.cta-band{background:linear-gradient(135deg,var(--gold),#e0b939);color:#1a1a1a;text-align:center;padding:60px 20px;border-radius:var(--radius);margin:40px auto;max-width:1160px}
.cta-band h2{font-size:clamp(24px,3.5vw,34px);margin-bottom:14px}
.cta-band p{margin-bottom:24px;font-size:17px}
.cta-band .btn{background:var(--navy);color:#fff}
.cta-band .btn:hover{background:#000}

/* Footer */
footer{background:#071a33;color:#c7d5e6;padding:60px 0 20px;margin-top:60px}
footer .grid{grid-template-columns:2fr 1fr 1fr 1fr;gap:40px}
footer h4{color:#fff;margin-bottom:16px;font-size:17px}
footer p,footer li{color:#a9bad0;font-size:14px;margin-bottom:8px}
footer ul{list-style:none}
footer a{color:#a9bad0}
footer a:hover{color:var(--gold)}
.footer-bottom{border-top:1px solid #1a3357;margin-top:40px;padding-top:20px;text-align:center;color:#7a8ba3;font-size:13px}

/* Responsive */
@media(max-width:900px){
  .split,.contact-grid,footer .grid{grid-template-columns:1fr}
  nav ul{display:none;position:absolute;top:100%;left:0;right:0;background:#fff;flex-direction:column;padding:12px;box-shadow:var(--shadow)}
  nav ul.open{display:flex}
  nav ul li{width:100%}
  nav ul a{display:block}
  .menu-toggle{display:block}
  article.long{padding:26px}
  .hero{min-height:460px}
}