:root{
  --navy-900:#0F1B30; --navy-800:#16233F; --navy-700:#22355C;
  --red:#C8102E; --red-deep:#A20D25;
  --steel-600:#4C5768; --steel-500:#64707F; --steel-300:#CDD3DB;
  --steel-200:#E2E6EC; --steel-100:#EDF0F4; --paper:#FFFFFF;

  --bg:var(--steel-100); --surface:var(--paper); --surface-2:#F6F8FA;
  --text:var(--navy-900); --text-muted:var(--steel-500);
  --rule:var(--steel-200); --rule-strong:var(--steel-300);
  --accent:var(--red); --accent-deep:var(--red-deep);
  --dark-bg:var(--navy-900); --dark-surface:var(--navy-800);
  --dark-text:#EAEEF4; --dark-muted:#9AA6B8; --dark-rule:rgba(255,255,255,.12);

  --sans-kr:'IBM Plex Sans KR','Malgun Gothic','Apple SD Gothic Neo',sans-serif;
  --display:'Archivo','Arial Narrow',var(--sans-kr);
  --maxw:1200px;
}
*{box-sizing:border-box;}
html{scroll-behavior:smooth;scroll-padding-top:72px;}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto;}}
body{margin:0;font-family:var(--sans-kr);background:var(--bg);color:var(--text);
  line-height:1.7;-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility;overflow-x:hidden;}
img{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 clamp(1.1rem,4vw,2.5rem);}
::selection{background:var(--red);color:#fff;}
:focus-visible{outline:2px solid var(--red);outline-offset:3px;}

/* nav */
header.nav{position:sticky;top:0;z-index:60;
  background:color-mix(in srgb,var(--bg) 88%,transparent);
  backdrop-filter:saturate(1.4) blur(10px);border-bottom:1px solid var(--rule);}
.nav-in{display:flex;align-items:center;gap:1.5rem;height:64px;}
.brand{display:flex;align-items:center;gap:.6rem;font-weight:700;}
.brand .mark{width:34px;height:34px;flex:0 0 auto;}
.brand img.mark{object-fit:contain;}
.brand .name{font-size:1.15rem;letter-spacing:-.01em;}
.brand .name small{display:block;font-family:var(--display);font-weight:600;font-size:.56rem;
  letter-spacing:.18em;color:var(--text-muted);line-height:1;margin-top:2px;}
nav.links{margin-left:auto;display:flex;align-items:center;gap:.3rem;}
nav.links a{padding:.5rem .85rem;font-size:.94rem;font-weight:500;color:var(--text-muted);border-radius:2px;transition:color .15s;}
nav.links a:hover,nav.links a.active{color:var(--text);}
nav.links a.active{box-shadow:inset 0 -2px 0 var(--red);}
.btn{display:inline-flex;align-items:center;gap:.5rem;font-family:var(--sans-kr);font-weight:600;
  font-size:.94rem;padding:.62rem 1.15rem;border:none;cursor:pointer;background:var(--red);color:#fff;
  transition:background .15s,transform .05s;
  clip-path:polygon(8px 0,100% 0,100% calc(100% - 8px),calc(100% - 8px) 100%,0 100%,0 8px);}
.btn:hover{background:var(--red-deep);}
.btn:active{transform:translateY(1px);}
.btn.ghost{background:transparent;color:var(--text);border:1px solid var(--rule-strong);clip-path:none;}
.btn.ghost:hover{border-color:var(--red);color:var(--red);}
.nav .btn{padding:.5rem 1rem;}
.menu-toggle{display:none;margin-left:auto;background:none;border:1px solid var(--rule-strong);
  color:var(--text);width:42px;height:38px;cursor:pointer;align-items:center;justify-content:center;}
.menu-toggle svg{width:20px;height:20px;}
@media(max-width:860px){
  nav.links{position:fixed;inset:64px 0 auto 0;flex-direction:column;align-items:stretch;gap:0;
    background:var(--surface);border-bottom:1px solid var(--rule);padding:.5rem 0;
    transform:translateY(-120%);transition:transform .25s ease;box-shadow:0 20px 40px rgba(0,0,0,.12);}
  nav.links.open{transform:translateY(0);}
  nav.links a{padding:.9rem clamp(1.1rem,4vw,2.5rem);border-bottom:1px solid var(--rule);}
  nav.links .btn{margin:.7rem clamp(1.1rem,4vw,2.5rem);justify-content:center;}
  .menu-toggle{display:inline-flex;}
}

/* hero */
.hero{position:relative;background:var(--dark-bg);color:var(--dark-text);overflow:hidden;}
.hero-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:2rem;align-items:center;
  padding:clamp(3rem,7vw,6rem) 0 clamp(2rem,4vw,3rem);}
.eyebrow{font-family:var(--display);font-weight:600;font-size:.8rem;letter-spacing:.06em;
  color:var(--dark-muted);display:flex;align-items:center;gap:.6rem;margin-bottom:1.4rem;}
.eyebrow::before{content:"";width:26px;height:2px;background:var(--red);}
h1.hero-title{font-family:var(--sans-kr);font-weight:700;font-size:clamp(3rem,8vw,5.6rem);
  line-height:.98;letter-spacing:-.03em;margin:0;}
.hero-en{font-family:var(--display);font-weight:700;font-size:clamp(.9rem,1.9vw,1.15rem);
  letter-spacing:.12em;color:var(--dark-text);margin:.9rem 0 0;}
.hero-lead{color:var(--dark-muted);font-size:1.02rem;max-width:46ch;margin:1.5rem 0 0;}
.hero-lead b{color:#fff;font-weight:600;}
.spec-strip{display:flex;align-items:baseline;gap:1rem;margin:2rem 0 0;padding-top:1.4rem;border-top:1px solid var(--dark-rule);}
.spec-strip .k{font-family:var(--display);font-weight:800;font-size:clamp(1.6rem,4vw,2.4rem);color:#fff;letter-spacing:-.02em;}
.spec-strip .k .dash{color:var(--red);padding:0 .35rem;}
.spec-strip .lbl{font-size:.82rem;color:var(--dark-muted);line-height:1.4;}
.hero-cta{display:flex;flex-wrap:wrap;gap:.8rem;margin-top:2rem;}
.hero .btn.ghost{color:#fff;border-color:rgba(255,255,255,.28);}
.hero .btn.ghost:hover{border-color:var(--red);color:#fff;background:rgba(200,16,46,.12);}
.hero-art{position:relative;min-height:280px;display:flex;align-items:center;justify-content:center;}
.hero-art svg{width:min(100%,440px);height:auto;overflow:visible;}
.hx-spin{transform-origin:center;animation:hxin 1.1s cubic-bezier(.16,1,.3,1) both;}
@keyframes hxin{from{opacity:0;transform:scale(.82) rotate(-12deg);}to{opacity:1;transform:scale(1) rotate(0);}}
@media (prefers-reduced-motion:reduce){.hx-spin{animation:none;}}
.certbar{border-top:1px solid var(--dark-rule);background:rgba(0,0,0,.18);}
.certbar-in{display:flex;flex-wrap:wrap;gap:.6rem 2.2rem;padding:1rem 0;font-size:.86rem;color:var(--dark-muted);}
.certbar-in span{display:inline-flex;align-items:center;gap:.55rem;font-family:var(--display);font-weight:600;letter-spacing:.02em;}
.certbar-in span::before{content:"";width:7px;height:7px;background:var(--red);transform:rotate(45deg);flex:0 0 auto;}
@media(max-width:820px){
  .hero-grid{grid-template-columns:1fr;gap:.5rem;}
  .hero-art{order:-1;min-height:auto;margin-bottom:.5rem;}
  .hero-art svg{width:min(62%,240px);}
}

/* page header (subpages) */
.page-hero{background:var(--dark-bg);color:#fff;padding:clamp(2.6rem,6vw,4.2rem) 0;}
.page-hero .kicker{font-family:var(--display);font-weight:700;font-size:.78rem;letter-spacing:.14em;color:var(--red);margin-bottom:.6rem;}
.page-hero h1{margin:0;font-size:clamp(1.9rem,4vw,2.8rem);letter-spacing:-.02em;}
.page-hero p{color:var(--dark-muted);margin:.7rem 0 0;max-width:60ch;}
.crumb{font-family:var(--display);font-size:.76rem;letter-spacing:.06em;color:var(--dark-muted);margin-top:1rem;}
.crumb a:hover{color:#fff;}

/* sections */
section{padding:clamp(3.5rem,8vw,6.5rem) 0;}
.sec-head{max-width:62ch;margin-bottom:clamp(2rem,4vw,3rem);}
.sec-kicker{font-family:var(--display);font-weight:700;font-size:.78rem;letter-spacing:.14em;color:var(--red);margin-bottom:.7rem;}
.sec-title{font-weight:700;font-size:clamp(1.7rem,3.6vw,2.5rem);line-height:1.12;letter-spacing:-.02em;margin:0;}
.sec-desc{color:var(--text-muted);margin-top:.9rem;font-size:1.02rem;}
.on-surface{background:var(--surface);}

/* about */
.about-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:clamp(2rem,5vw,4rem);align-items:center;}
.about-body p{color:var(--text-muted);max-width:62ch;}
.about-body p+p{margin-top:1.1rem;}
.about-body h3{margin:2rem 0 .6rem;font-size:1.2rem;}
.facts{display:grid;grid-template-columns:1fr 1fr;gap:1px;background:var(--rule);border:1px solid var(--rule);margin-top:2rem;}
.fact{background:var(--surface);padding:1.3rem 1.4rem;}
.fact .v{font-family:var(--display);font-weight:800;font-size:1.5rem;letter-spacing:-.02em;color:var(--text);}
.fact .v em{font-style:normal;color:var(--red);}
.fact .l{font-size:.85rem;color:var(--text-muted);margin-top:.25rem;}
.about-art{display:flex;align-items:center;justify-content:center;}
.about-art svg{width:min(100%,360px);height:auto;}
@media(max-width:800px){.about-grid{grid-template-columns:1fr;}.about-art{order:-1;}.about-art svg{width:min(58%,220px);}}

/* history */
.history{margin-top:2.5rem;border-top:1px solid var(--rule-strong);}
.history .row{display:grid;grid-template-columns:120px 1fr;gap:1.5rem;padding:1.1rem 0;border-bottom:1px solid var(--rule);}
.history .yr{font-family:var(--display);font-weight:800;color:var(--red);font-size:1.15rem;}
.history .dt{color:var(--text);}
@media(max-width:520px){.history .row{grid-template-columns:70px 1fr;gap:1rem;}}

/* products */
.cat-block{margin-bottom:3rem;}
.cat-head{display:flex;align-items:baseline;gap:.9rem;border-bottom:2px solid var(--navy-900);padding-bottom:.6rem;margin-bottom:1.4rem;}
.cat-head h2{margin:0;font-size:1.4rem;letter-spacing:-.01em;}
.cat-head .en{font-family:var(--display);font-weight:600;font-size:.78rem;letter-spacing:.12em;color:var(--text-muted);}
.prod-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:1px;background:var(--rule);border:1px solid var(--rule);}
.prod{background:var(--surface);padding:1.9rem 1.7rem;position:relative;transition:background .15s;border-left:3px solid transparent;display:flex;flex-direction:column;}
.prod:hover{background:var(--surface-2);border-left-color:var(--red);}
.prod .thumb{width:100%;aspect-ratio:4/3;object-fit:cover;margin-bottom:1.1rem;background:var(--steel-100);}
.prod .icon{width:52px;height:52px;color:var(--navy-700);margin-bottom:1.2rem;}
.prod .en{font-family:var(--display);font-weight:700;font-size:.72rem;letter-spacing:.14em;color:var(--red);}
.prod .ko{font-weight:600;font-size:1.2rem;margin:.35rem 0 .5rem;letter-spacing:-.01em;}
.prod .spec{font-family:var(--display);font-size:.78rem;color:var(--text-muted);margin-bottom:.4rem;}
.prod .desc{font-size:.9rem;color:var(--text-muted);line-height:1.6;}
@media(max-width:820px){.prod-grid{grid-template-columns:repeat(2,1fr);}}
@media(max-width:520px){.prod-grid{grid-template-columns:1fr;}}

/* certifications */
.cert-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:1.4rem;}
.cert{border:1px solid var(--rule-strong);padding:1.7rem;position:relative;background:var(--surface);}
.cert .badge{width:44px;height:44px;color:var(--red);margin-bottom:1.1rem;}
.cert img.certimg{width:100%;margin-bottom:1.1rem;border:1px solid var(--rule);}
.cert h3{margin:0 0 .5rem;font-size:1.15rem;letter-spacing:-.01em;}
.cert .std{font-family:var(--display);font-weight:600;font-size:.78rem;letter-spacing:.06em;color:var(--text-muted);}
.cert p{font-size:.9rem;color:var(--text-muted);margin:.8rem 0 0;line-height:1.6;}
.cert dl{margin:1rem 0 0;font-size:.82rem;display:grid;grid-template-columns:auto 1fr;gap:.25rem .8rem;}
.cert dt{color:var(--text-muted);}
.cert dd{margin:0;font-family:var(--display);font-weight:500;word-break:break-all;}
@media(max-width:800px){.cert-grid{grid-template-columns:1fr;}}

/* contact / inquiry */
.contact-grid{display:grid;grid-template-columns:.9fr 1.1fr;gap:clamp(2rem,5vw,4rem);}
.cinfo dl{margin:0;display:grid;grid-template-columns:auto 1fr;gap:1rem 1.4rem;align-items:start;}
.cinfo dt{font-family:var(--display);font-weight:600;font-size:.74rem;letter-spacing:.12em;color:var(--text-muted);padding-top:.28rem;}
.cinfo dd{margin:0;font-size:1.02rem;color:var(--text);}
.cinfo dd a:hover{color:var(--red);}
.cinfo dd small{display:block;color:var(--text-muted);font-size:.82rem;font-family:var(--display);letter-spacing:.02em;margin-top:.15rem;}
.cform{background:var(--surface);border:1px solid var(--rule-strong);padding:clamp(1.4rem,3vw,2rem);}
.cform .row{display:grid;grid-template-columns:1fr 1fr;gap:1rem;}
.field{margin-bottom:1rem;}
.field label{display:block;font-size:.82rem;color:var(--text-muted);margin-bottom:.4rem;font-weight:500;}
.field input,.field select,.field textarea{width:100%;background:var(--surface-2);border:1px solid var(--rule-strong);
  color:var(--text);font-family:var(--sans-kr);font-size:.95rem;padding:.7rem .85rem;border-radius:0;}
.field input:focus,.field textarea:focus,.field select:focus{border-color:var(--red);outline:none;background:var(--surface);}
.field textarea{resize:vertical;min-height:110px;}
.field .req{color:var(--red);}
.field .errorlist{list-style:none;margin:.35rem 0 0;padding:0;color:var(--red);font-size:.82rem;}
.cform .btn{width:100%;justify-content:center;padding:.85rem;margin-top:.4rem;}
.hp{position:absolute;left:-9999px;width:1px;height:1px;overflow:hidden;}
.flash{padding:.9rem 1.1rem;margin-bottom:1.3rem;border-left:3px solid var(--red);background:var(--surface);color:var(--text);font-size:.95rem;}
.flash.success{border-left-color:#1a8a4a;}
@media(max-width:820px){.contact-grid{grid-template-columns:1fr;}.cform .row{grid-template-columns:1fr;}}

/* map */
.map-embed{width:100%;aspect-ratio:16/9;border:1px solid var(--rule-strong);margin-top:1.6rem;background:var(--surface-2);}
.map-embed iframe{width:100%;height:100%;border:0;display:block;}
.map-fallback{display:flex;align-items:center;justify-content:center;height:100%;color:var(--text-muted);font-size:.9rem;padding:1rem;text-align:center;}

/* footer */
footer.site{background:#0A1322;color:var(--dark-muted);border-top:1px solid var(--dark-rule);padding:3rem 0 2.2rem;font-size:.9rem;}
.foot-top{display:flex;flex-wrap:wrap;gap:2rem;justify-content:space-between;align-items:flex-start;}
.foot-brand{display:flex;align-items:center;gap:.7rem;color:#fff;font-weight:700;font-size:1.1rem;margin-bottom:.9rem;}
.foot-brand .mark{width:32px;height:32px;}
.foot-addr{max-width:46ch;line-height:1.7;}
.foot-addr b{color:#e7ecf4;font-weight:600;}
.foot-meta{text-align:right;line-height:1.9;font-family:var(--display);font-size:.82rem;letter-spacing:.02em;}
.foot-meta a:hover{color:#fff;}
.foot-cert{display:flex;flex-wrap:wrap;gap:.5rem 1.4rem;margin-top:1.3rem;font-family:var(--display);font-size:.76rem;letter-spacing:.06em;color:#6d7c92;}
.foot-bar{border-top:1px solid var(--dark-rule);margin-top:2.2rem;padding-top:1.3rem;display:flex;flex-wrap:wrap;gap:.5rem 1.5rem;justify-content:space-between;font-size:.78rem;color:#5c6a80;}
@media(max-width:640px){.foot-meta{text-align:left;}.foot-top{gap:1.4rem;}}