/* LAF 라프라이트 - White & Blue Premium Theme */
:root {
  --bg: #f4f7fc;
  --bg2: #eef2f8;
  --bg3: #ffffff;
  --ink: #1a1a2e;
  --ink2: #5a6a7e;
  --brand: #1a73e8;
  --brand-light: #4a94f0;
  --accent: #7ba0d0;
  --border: #d0d8e4;
  --radius: 12px;
  --shadow: 0 4px 30px rgba(0,0,0,0.06);
  --font: 'Pretendard', -apple-system, 'Segoe UI', sans-serif;
}

*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  font-family:var(--font);
  background:var(--bg);
  color:var(--ink);
  line-height:1.7;
  padding-bottom:120px;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
  width:100%;
}
img{max-width:100%;height:auto;display:block}
a{color:var(--brand);text-decoration:none;transition:color .3s}
a:hover{color:var(--brand-light)}

/* Container */
.container{max-width:1080px;margin:0 auto;padding:0 24px}
.section{padding:96px 0}
.section-title{
  font-size:clamp(28px,4vw,42px);
  font-weight:700;
  text-align:center;
  margin-bottom:12px;
  letter-spacing:-0.02em;
  color:var(--ink);
}
.section-sub{
  text-align:center;
  color:var(--ink2);
  font-size:17px;
  margin-bottom:56px;
}

/* Navbar */
.navbar{
  position:fixed;top:0;left:0;right:0;
  z-index:1000;
  background:#ffffff !important;
  backdrop-filter:blur(16px);
  border-bottom:1px solid var(--border);
  transition:transform .3s;
}
.nav-inner{
  max-width:1080px;margin:0 auto;
  display:flex;align-items:center;
  justify-content:space-between;
  padding:0 24px;height:64px;
}
.nav-logo{display:flex;align-items:center}
.nav-logo img{height:32px;width:auto}
.nav-menu{
  display:flex;align-items:center;
  list-style:none;gap:28px;
}
.nav-menu a{
  color:var(--ink2);
  font-size:14px;font-weight:500;
  letter-spacing:0.5px;
  transition:color .3s;
}
.nav-menu a:hover{color:var(--brand)}

/* Hamburger */
.hamburger{
  display:none;flex-direction:column;
  gap:5px;background:none;border:none;
  cursor:pointer;padding:8px;
}
.hamburger span{
  display:block;width:24px;height:2px;
  background:var(--ink);
  border-radius:2px;transition:.3s;
}

/* Lang Switch */
.lang-switch{display:flex;gap:4px;margin-left:8px}
.lang-btn{
  background:none;border:1px solid var(--border);
  color:var(--ink2);padding:4px 8px;
  border-radius:6px;cursor:pointer;
  font-size:14px;transition:.3s;
}
.lang-btn.active{
  background:var(--brand);
  border-color:var(--brand);
  color:#fff;
}
.lang-btn:hover{border-color:var(--brand)}

/* Hero */
.hero{
  position:relative;
  min-height:100vh;
  display:flex;align-items:center;justify-content:center;
  text-align:center;
  background:linear-gradient(135deg, #0d47a1 0%, #1a73e8 40%, #4a94f0 100%);
  overflow:hidden;
}
.hero-overlay{
  position:absolute;inset:0;
  background:linear-gradient(135deg,rgba(13,71,161,0.75) 0%,rgba(26,115,232,0.5) 50%,rgba(74,148,240,0.75) 100%);
}
.hero-content{
  position:relative;z-index:2;
  max-width:760px;padding:24px;
}
.hero-logo{margin:0 auto 32px;filter:drop-shadow(0 0 20px rgba(26,115,232,0.3))}
.hero h1{
  font-size:clamp(28px,5vw,56px);
  font-weight:700;
  letter-spacing:-0.03em;
  margin-bottom:20px;
  color:#fff;
  text-shadow:0 2px 20px rgba(0,0,0,0.2);
}
.hero-sub{
  font-size:clamp(16px,2vw,20px);
  color:rgba(255,255,255,0.8);
  margin-bottom:40px;
}
.hero-actions{display:flex;gap:16px;justify-content:center;flex-wrap:wrap}

/* Buttons */
.btn{
  display:inline-flex;align-items:center;justify-content:center;
  padding:14px 32px;border-radius:8px;
  font-weight:600;font-size:15px;
  transition:all .3s;cursor:pointer;
  border:2px solid transparent;
}
.btn-primary{
  background:var(--brand);
  color:#fff;
  border-color:var(--brand);
}
.btn-primary:hover{
  background:var(--brand-light);
  transform:translateY(-2px);
  box-shadow:0 8px 30px rgba(26,115,232,0.3);
}
.btn-outline{
  background:transparent;
  color:var(--ink);
  border-color:var(--border);
}
.btn-outline:hover{
  border-color:var(--brand);
  color:var(--brand);
  transform:translateY(-2px);
}
.btn-block{width:100%}

/* About */
.about{background:var(--bg2)}
.about-grid{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:60px;
  align-items:center;
}
.about h2{text-align:left;margin-bottom:24px}
.about-desc{
  color:var(--ink2);
  font-size:16px;
  margin-bottom:16px;
  line-height:1.8;
}
.about-stats{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:16px;margin-top:32px;
}
.stat{
  background:var(--bg3);
  padding:20px;border-radius:var(--radius);
  text-align:center;
  border:1px solid var(--border);
  box-shadow:var(--shadow);
}
.stat strong{
  display:block;
  font-size:28px;
  color:var(--brand);
  margin-bottom:4px;
}
.stat span{font-size:13px;color:var(--ink2)}
.about-image{
  border-radius:var(--radius);
  overflow:hidden;
  box-shadow:var(--shadow);
}
.about-image img{width:100%;height:400px;object-fit:cover}

/* Tech */
.tech{background:var(--bg)}
.tech-cards{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:24px;
}
.tech-card{
  background:var(--bg3);
  border:1px solid var(--border);
  border-radius:var(--radius);
  padding:32px 24px 36px;
  text-align:center;
  transition:all .4s;
  box-shadow:var(--shadow);
}
.tech-card:hover{
  border-color:var(--brand);
  transform:translateY(-6px);
  box-shadow:0 12px 40px rgba(26,115,232,0.12);
}
.tech-card-img{
  width:100%;
  height:180px;
  object-fit:cover;
  border-radius:8px;
  margin-bottom:20px;
}
.tech-card h3{
  font-size:20px;font-weight:700;
  margin-bottom:12px;color:var(--ink);
}
.tech-card p{font-size:15px;color:var(--ink2);line-height:1.7}

/* Process */
.process{background:var(--bg2)}
.process-grid{
  display:grid;
  grid-template-columns:repeat(2,1fr);
  gap:24px;
}
.process-item{
  position:relative;
  border-radius:var(--radius);
  overflow:hidden;
  cursor:pointer;
}
.process-item img{
  width:100%;height:280px;
  object-fit:cover;
  transition:transform .5s;
}
.process-item:hover img{transform:scale(1.05)}
.process-info{
  position:absolute;bottom:0;left:0;right:0;
  background:linear-gradient(transparent,rgba(13,71,161,0.85));
  padding:24px;text-align:center;
}
.process-info h3{font-size:18px;margin-bottom:6px;color:#fff}
.process-info p{font-size:14px;color:rgba(255,255,255,0.8)}

/* Products */
.products{background:var(--bg)}
.products-grid{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:24px;
  margin-bottom:40px;
}
.product-card{
  background:var(--bg3);
  border:1px solid var(--border);
  border-radius:var(--radius);
  overflow:hidden;
  transition:all .4s;
  box-shadow:var(--shadow);
}
.product-card:hover{
  border-color:var(--brand);
  transform:translateY(-4px);
  box-shadow:0 8px 30px rgba(26,115,232,0.1);
}
.product-img{height:200px;overflow:hidden}
.product-img img{width:100%;height:100%;object-fit:cover;transition:transform .5s}
.product-card:hover .product-img img{transform:scale(1.05)}
.product-body{padding:24px}
.product-body h3{font-size:18px;margin-bottom:8px}
.product-body p{font-size:14px;color:var(--ink2);line-height:1.6}
.product-pdf{
  text-align:center;
  background:var(--bg3);
  border:1px solid var(--border);
  border-radius:var(--radius);
  padding:36px;
  box-shadow:var(--shadow);
}
.product-pdf p{font-size:16px;margin-bottom:16px;color:var(--ink2)}
.product-pdf .btn{display:inline-flex}

/* Contact */
.contact{background:var(--bg2)}
.contact-wrap{
  display:grid;
  grid-template-columns:1.2fr 1fr;
  gap:40px;
}
.contact-form{
  background:var(--bg3);
  border:1px solid var(--border);
  border-radius:var(--radius);
  padding:36px;
  box-shadow:var(--shadow);
}
.form-group{margin-bottom:16px}
.form-group input,.form-group textarea{
  width:100%;padding:14px 16px;
  background:var(--bg);
  border:1px solid var(--border);
  border-radius:8px;
  color:var(--ink);
  font-family:var(--font);
  font-size:15px;
  transition:border .3s;
  outline:none;
}
.form-group input:focus,.form-group textarea:focus{
  border-color:var(--brand);
  box-shadow:0 0 0 3px rgba(26,115,232,0.1);
}
.form-group textarea{resize:vertical;min-height:120px}
.form-note{font-size:13px;color:var(--ink2);margin-top:12px}
.contact-info{display:flex;flex-direction:column;gap:20px}
.contact-card{
  background:var(--bg3);
  border:1px solid var(--border);
  border-radius:var(--radius);
  padding:28px;
  box-shadow:var(--shadow);
}
.contact-card h3{font-size:18px;margin-bottom:20px}
.contact-row{
  display:flex;align-items:center;
  gap:12px;padding:10px 0;
  border-bottom:1px solid var(--border);
}
.contact-row:last-child{border-bottom:none}
.contact-label{font-size:14px;color:var(--ink2);min-width:80px}
.contact-row a{color:var(--brand);font-size:14px}
.contact-row a:hover{color:var(--brand-light)}
.location p{color:var(--ink2);font-size:15px;line-height:1.8}
.btn-map{margin-top:16px;font-size:14px;width:100%}
.kakao-qr-img{width:120px;height:120px;object-fit:contain;border-radius:8px;border:1px solid var(--border)}

/* FAB */
.fab{
  position:fixed;
  bottom:160px;right:24px;
  width:56px;height:56px;
  border-radius:50%;
  background:var(--brand);
  color:#fff;
  display:flex;align-items:center;justify-content:center;
  font-size:24px;
  box-shadow:0 4px 20px rgba(26,115,232,0.3);
  z-index:999;
  transition:all .3s;
}
.fab:hover{transform:scale(1.1);color:#fff}
.fab-kakao{bottom:230px;background:#fee500;color:#3c1e1e}
.fab-kakao:hover{color:#3c1e1e}

/* Footer */
.footer{
  background:var(--bg3);
  border-top:1px solid var(--border);
  padding:40px 0;
}
.footer-inner{
  display:flex;justify-content:space-between;
  align-items:center;
}
.footer-brand{display:flex;align-items:center;gap:12px}
.footer-brand img{height:28px;width:auto}
.footer-brand p{font-size:13px;color:var(--ink2)}
.footer-links span{font-size:13px;color:var(--ink2)}

/* Lightbox Modal */
.lightbox{
  display:none;
  position:fixed;top:0;left:0;right:0;bottom:0;
  z-index:9999;
  background:rgba(0,0,0,0.85);
  backdrop-filter:blur(8px);
  justify-content:center;align-items:center;
  padding:40px;
}
.lightbox.active{display:flex}
.lightbox-content{
  max-width:900px;
  max-height:80vh;
  width:100%;
  position:relative;
  border-radius:12px;
  overflow:hidden;
  box-shadow:0 20px 60px rgba(0,0,0,0.5);
}
.lightbox-slide{
  display:none;
}
.lightbox-slide.active{display:block}
.lightbox-slide img{
  width:100%;
  max-height:70vh;
  object-fit:contain;
  background:#111;
}
.lightbox-caption{
  background:rgba(0,0,0,0.7);
  color:#fff;
  padding:16px 24px;
  text-align:center;
  font-size:15px;
}
.lightbox-close{
  position:absolute;top:16px;right:16px;
  width:40px;height:40px;
  border-radius:50%;
  background:rgba(0,0,0,0.5);
  border:none;color:#fff;
  font-size:24px;cursor:pointer;
  display:flex;align-items:center;justify-content:center;
  transition:background .3s;z-index:10;
}
.lightbox-close:hover{background:rgba(0,0,0,0.8)}
.lightbox-nav{
  position:absolute;top:50%;transform:translateY(-50%);
  width:44px;height:44px;
  border-radius:50%;
  background:rgba(0,0,0,0.4);
  border:none;color:#fff;
  font-size:20px;cursor:pointer;
  display:flex;align-items:center;justify-content:center;
  transition:background .3s;z-index:10;
}
.lightbox-nav:hover{background:rgba(0,0,0,0.7)}
.lightbox-prev{left:16px}
.lightbox-next{right:16px}
.lightbox-thumbs{
  display:flex;gap:8px;
  justify-content:center;
  padding:12px 0;
  background:rgba(0,0,0,0.4);
}
.lightbox-thumb{
  width:56px;height:42px;
  border-radius:4px;
  object-fit:cover;
  cursor:pointer;
  opacity:0.5;
  border:2px solid transparent;
  transition:all .3s;
}
.lightbox-thumb.active{opacity:1;border-color:var(--brand)}

/* Submit Success */
.form-success{
  text-align:center;padding:40px;
}
.form-success h3{font-size:24px;color:var(--brand);margin-bottom:12px}
.form-success p{color:var(--ink2)}

/* Responsive */
@media(max-width:768px){
  body{padding-bottom:90px}
  .section{padding:64px 0}
  .hamburger{display:flex}
  .nav-menu{
    position:fixed;top:64px;left:0;right:0;
    background:#ffffff !important;
    backdrop-filter:blur(16px);
    flex-direction:column;
    padding:24px;gap:16px;
    transform:translateY(-120%);
    transition:transform .4s;
    border-bottom:1px solid var(--border);
  }
  .nav-menu.active{transform:translateY(0)}
  .lang-switch{margin-left:0;margin-top:8px}
  .about-grid{grid-template-columns:1fr;gap:32px}
  .about-image img{height:240px}
  .about-stats{grid-template-columns:repeat(2,1fr)}
  .tech-cards{grid-template-columns:1fr}
  .process-grid{grid-template-columns:1fr}
  .products-grid{grid-template-columns:1fr}
  .contact-wrap{grid-template-columns:1fr}
  .hero h1{font-size:clamp(24px,8vw,36px)}
  .footer-inner{flex-direction:column;gap:16px;text-align:center}
  .fab{bottom:110px;right:16px;width:48px;height:48px;font-size:20px}
  .fab-kakao{bottom:170px}
  .contact-label{min-width:auto;flex-shrink:0}
  .contact-row{flex-wrap:wrap;gap:6px}
  .process-item img{height:200px}
  .about-image img{height:220px}
  .contact-form{padding:24px}
  .contact-card{padding:20px}
  .product-pdf{padding:24px}
  .hero-logo{height:60px;margin-bottom:24px}
  .tech-card-img{height:160px}
  .lightbox{padding:16px}
  .lightbox-thumbs{flex-wrap:wrap}
  .lightbox-thumb{width:48px;height:36px}
  .lightbox-nav{width:36px;height:36px;font-size:16px}
  .lightbox-prev{left:8px}
  .lightbox-next{right:8px}
}

@media(min-width:769px) and (max-width:1024px){
  .products-grid{grid-template-columns:repeat(2,1fr)}
}

/* Navbar hide on scroll down */
.navbar.hidden{transform:translateY(-100%)}