:root{
  --navy:#101A2B;
  --navy-2:#16233A;
  --paper:#F3F5F4;
  --paper-2:#EAEDEC;
  --ink:#16232F;
  --ink-soft:#4C5A63;
  --red:#C20001;
  --red-deep:#8F0000;
  --red-on-dark:#F0555C;
  --amber:#E8A23D;
  --line:#D7DEDD;
  --line-dark:rgba(255,255,255,.12);
  --on-dark:#F3F5F4;
  --on-dark-soft:#AEB9C4;
  --radius:2px;
  --maxw:1180px;
}
@media (prefers-color-scheme: dark){
  :root:not([data-theme="light"]){
    --paper:#0C1420;
    --paper-2:#111B29;
    --ink:#E7ECEE;
    --ink-soft:#9FADB8;
    --line:rgba(255,255,255,.12);
  }
}
:root[data-theme="dark"]{
  --paper:#0C1420;
  --paper-2:#111B29;
  --ink:#E7ECEE;
  --ink-soft:#9FADB8;
  --line:rgba(255,255,255,.12);
}
*{box-sizing:border-box; margin:0; padding:0;}
html{scroll-behavior:smooth;}
body{
  font-family:'Noto Sans KR', -apple-system, sans-serif;
  background:var(--paper);
  color:var(--ink);
  line-height:1.6;
  overflow-x:hidden;
}
.mono{ font-family:'IBM Plex Mono', monospace; }
a{ color:inherit; }
img{ max-width:100%; display:block; }
.wrap{ max-width:var(--maxw); margin:0 auto; padding:0 32px; }
section{ overflow-x:auto; }

/* ---------- Header ---------- */
header{
  position:sticky; top:0; z-index:50;
  background:rgba(16,26,43,0.92);
  backdrop-filter:blur(8px);
  border-bottom:1px solid var(--line-dark);
}
.header-row{
  max-width:var(--maxw); margin:0 auto; padding:0 32px;
  min-height:72px; display:flex; align-items:center; justify-content:space-between;
  gap:20px; color:var(--on-dark);
}
.brand{ display:flex; align-items:center; gap:12px; font-weight:700; font-size:1rem; letter-spacing:0.01em; max-width:340px; text-decoration:none; }
.brand-logo{ width:42px; height:42px; flex-shrink:0; object-fit:contain; }
.brand-text{ display:flex; align-items:baseline; gap:8px; line-height:1.2; flex-wrap:wrap; }
.brand-name{ font-size:0.92rem; }
.kr-badge{
  font-family:'IBM Plex Mono', monospace; font-weight:500; font-size:0.64rem;
  color:var(--red-on-dark); border:1px solid currentColor; border-radius:999px;
  padding:1px 7px; letter-spacing:0.06em; flex-shrink:0;
}
footer .kr-badge{ color:var(--on-dark-soft); }
nav{ display:flex; align-items:center; gap:34px; }
nav a{ text-decoration:none; font-size:0.92rem; color:var(--on-dark-soft); transition:color .15s; position:relative; }
nav a:hover{ color:var(--on-dark); }
nav a.active{ color:var(--on-dark); }
nav a.active::after{ content:""; position:absolute; left:0; right:0; bottom:-24px; height:2px; background:var(--red); }
.lang-toggle{
  display:flex; border:1px solid var(--line-dark); border-radius:999px; overflow:hidden;
  font-family:'IBM Plex Mono', monospace; font-size:0.72rem; flex-shrink:0;
}
.lang-toggle button{
  border:none; background:transparent; color:var(--on-dark-soft); padding:7px 14px; cursor:pointer;
  letter-spacing:0.05em;
}
.lang-toggle button.active{ background:var(--red); color:#fff; }
.header-controls{ display:flex; align-items:center; gap:10px; flex-shrink:0; }
.icon-toggle{
  display:flex; align-items:center; justify-content:center;
  width:34px; height:34px; border:1px solid var(--line-dark); border-radius:999px;
  background:transparent; color:var(--on-dark-soft); cursor:pointer; flex-shrink:0; padding:0;
  transition:color .15s, border-color .15s;
}
.icon-toggle:hover{ color:var(--on-dark); border-color:var(--on-dark-soft); }
.icon-toggle svg{ width:16px; height:16px; }

/* ---------- Hero (home) ---------- */
.hero{
  background:var(--navy);
  color:var(--on-dark);
  position:relative;
  background-image:
    linear-gradient(var(--line-dark) 1px, transparent 1px),
    linear-gradient(90deg, var(--line-dark) 1px, transparent 1px);
  background-size:44px 44px;
}
.hero-inner{
  max-width:var(--maxw); margin:0 auto; padding:96px 32px 88px;
  display:grid; grid-template-columns:1.1fr 0.9fr; gap:40px; align-items:center;
}
.eyebrow{ font-family:'IBM Plex Mono', monospace; font-size:0.78rem; color:var(--red-deep); margin-bottom:18px; letter-spacing:0.02em; }
.hero .eyebrow{ color:var(--red-on-dark); }
h1{ font-size:2.6rem; font-weight:900; line-height:1.32; letter-spacing:-0.01em; max-width:520px; }
.hero p.sub{ margin-top:22px; max-width:460px; color:var(--on-dark-soft); font-size:1.02rem; }
.cta-row{ margin-top:36px; display:flex; gap:14px; flex-wrap:wrap; }
.btn{
  display:inline-flex; align-items:center; gap:8px;
  padding:13px 26px; border-radius:var(--radius); font-size:0.94rem; font-weight:500;
  text-decoration:none; cursor:pointer; border:1px solid transparent; transition:opacity .15s;
}
.btn-primary{ background:var(--red); color:#fff; }
.btn-ghost{ border-color:var(--line-dark); color:var(--on-dark); }
.btn:hover{ opacity:0.86; }

.radar-wrap{ display:flex; justify-content:center; align-items:center; }
.radar-svg{ width:100%; max-width:340px; }
.sweep{ transform-origin:170px 170px; animation:spin 4.5s linear infinite; }
@media (prefers-reduced-motion: reduce){ .sweep{ animation:none; } }
@keyframes spin{ to{ transform:rotate(360deg); } }

/* ---------- Page banner (sub-pages) ---------- */
.page-banner{
  background:var(--navy); color:var(--on-dark);
  padding:64px 0 48px;
  background-image:
    linear-gradient(var(--line-dark) 1px, transparent 1px),
    linear-gradient(90deg, var(--line-dark) 1px, transparent 1px);
  background-size:44px 44px;
}
.page-banner h1{ font-size:2rem; max-width:640px; }
.page-banner p.sub{ margin-top:14px; color:var(--on-dark-soft); max-width:560px; font-size:1rem; }

/* ---------- Stat / industries band ---------- */
.stat-band{ background:var(--navy-2); color:var(--on-dark); border-top:1px solid var(--line-dark); border-bottom:1px solid var(--line-dark); }
.stat-grid{ max-width:var(--maxw); margin:0 auto; padding:0 32px; display:grid; grid-template-columns:repeat(4,1fr); }
.stat{ padding:34px 24px; border-left:1px solid var(--line-dark); }
.stat:first-child{ border-left:none; }
.stat .num{ font-family:'IBM Plex Mono', monospace; font-size:1.9rem; color:var(--amber); font-weight:600; }
.stat .label{ margin-top:6px; font-size:0.86rem; color:var(--on-dark-soft); }
.stat .note{ margin-top:14px; font-size:0.68rem; color:rgba(255,255,255,0.32); }
.industries-band{ padding:52px 0; }
.industry-tags{ display:flex; flex-wrap:wrap; gap:12px; }
.industry-tags span{
  border:1px solid var(--line-dark); border-radius:999px; padding:9px 18px;
  font-size:0.86rem; color:var(--on-dark-soft);
}

/* ---------- Section shell ---------- */
.section{ padding:96px 0; }
.section-head{ max-width:560px; margin-bottom:56px; }
.section-head .eyebrow{ color:var(--red-deep); }
.section-head h2{ font-size:1.9rem; font-weight:700; letter-spacing:-0.01em; margin-top:10px; }
.section-head p{ margin-top:14px; color:var(--ink-soft); }
.section-alt{ background:var(--paper-2); }

/* ---------- Product grid (home preview) ---------- */
.product-grid{ display:grid; grid-template-columns:repeat(3,1fr); gap:1px; background:var(--line); border:1px solid var(--line); }
.product-card{ background:var(--paper); padding:38px; }
.product-icon{ width:44px; height:44px; margin-bottom:22px; }
.product-card h3{ font-size:1.2rem; font-weight:700; margin-bottom:10px; }
.product-card .tagline{ color:var(--red-deep); font-size:0.85rem; font-weight:500; margin-bottom:14px; }
.product-card p.desc{ color:var(--ink-soft); font-size:0.92rem; margin-bottom:18px; }
.spec-list{ list-style:none; border-top:1px solid var(--line); padding-top:14px; display:grid; gap:8px; }
.spec-list li{ display:flex; justify-content:space-between; font-size:0.82rem; gap:12px; }
.spec-list li .k{ color:var(--ink-soft); }
.spec-list li .v{ font-family:'IBM Plex Mono', monospace; color:var(--ink); text-align:right; }

/* ---------- Device catalog (products page) ---------- */
.device-list{ display:grid; gap:1px; background:var(--line); border:1px solid var(--line); }
.device-row{
  background:var(--paper); display:grid; grid-template-columns:280px 1fr; gap:36px; padding:40px;
}
.device-photo{
  border:1px solid var(--line); background:var(--paper-2);
  display:flex; align-items:center; justify-content:center; padding:18px; aspect-ratio:4/3;
}
.device-photo img, .device-photo svg{ width:100%; height:100%; object-fit:contain; }
.device-photo-caption{ margin-top:8px; font-family:'IBM Plex Mono', monospace; font-size:0.66rem; color:var(--ink-soft); text-align:center; }
.device-body .tagline{ color:var(--red-deep); font-size:0.82rem; font-weight:500; margin-bottom:10px; }
.device-body h3{ font-size:1.35rem; font-weight:700; margin-bottom:10px; }
.device-body p.desc{ color:var(--ink-soft); font-size:0.94rem; margin-bottom:18px; max-width:640px; }
.device-body .spec-list{ max-width:520px; }

/* ---------- About / Solutions diagrams ---------- */
.about-grid{ display:grid; grid-template-columns:1fr 1fr; gap:64px; align-items:center; }
.about-copy p{ color:var(--ink-soft); margin-top:16px; }
.about-copy p:first-of-type{ margin-top:0; }
.diagram-box{ border:1px solid var(--line); padding:32px; background:var(--paper); }
.diagram-box svg{ width:100%; height:auto; }
.diagram-caption{ margin-top:14px; font-family:'IBM Plex Mono', monospace; font-size:0.72rem; color:var(--ink-soft); text-align:center; }

.value-grid{ display:grid; grid-template-columns:repeat(3,1fr); gap:1px; background:var(--line); border:1px solid var(--line); margin-top:12px; }
.value-card{ background:var(--paper); padding:32px; }
.value-card h3{ font-size:1.05rem; font-weight:700; margin-bottom:10px; }
.value-card p{ color:var(--ink-soft); font-size:0.9rem; }

/* ---------- Contact ---------- */
.contact-grid{ display:grid; grid-template-columns:0.85fr 1.15fr; gap:56px; }
.contact-info dl{ display:grid; grid-template-columns:auto 1fr; gap:10px 18px; margin-top:28px; font-size:0.92rem; }
.contact-info dt{ font-family:'IBM Plex Mono', monospace; font-size:0.72rem; color:var(--ink-soft); padding-top:2px; white-space:nowrap; }
.contact-info dd{ color:var(--ink); }
form{ display:grid; gap:16px; border:1px solid var(--line); padding:32px; background:var(--paper); }
.form-row{ display:grid; grid-template-columns:1fr 1fr; gap:16px; }
label{ display:block; font-size:0.78rem; color:var(--ink-soft); margin-bottom:6px; }
input, textarea{
  width:100%; border:1px solid var(--line); background:transparent; color:var(--ink);
  padding:11px 12px; font-family:inherit; font-size:0.92rem; border-radius:var(--radius);
}
input:focus, textarea:focus{ outline:2px solid var(--red); outline-offset:1px; }
textarea{ resize:vertical; min-height:96px; }

footer{ background:var(--navy); color:var(--on-dark-soft); padding:48px 0 28px; }
.footer-row{ display:flex; justify-content:space-between; align-items:flex-start; flex-wrap:wrap; gap:24px; }
.footer-row .brand{ color:var(--on-dark); }
footer .cols{ display:flex; gap:56px; flex-wrap:wrap; }
footer .cols div h4{ font-size:0.8rem; color:var(--on-dark); margin-bottom:12px; }
footer .cols div a{ display:block; text-decoration:none; font-size:0.86rem; color:var(--on-dark-soft); margin-bottom:8px; }
.foot-bottom{ margin-top:40px; padding-top:22px; border-top:1px solid var(--line-dark); font-size:0.76rem; display:flex; justify-content:space-between; flex-wrap:wrap; gap:10px; }

@media (max-width: 980px){
  .brand{ max-width:220px; }
  .brand-name{ font-size:0.8rem; }
  .product-grid{ grid-template-columns:repeat(2,1fr); }
  .value-grid{ grid-template-columns:1fr; }
}
@media (max-width: 860px){
  nav{ display:none; }
  .brand{ max-width:none; }
  .hero-inner{ grid-template-columns:1fr; }
  .radar-wrap{ order:-1; max-width:220px; margin:0 auto 12px; }
  h1{ font-size:2rem; }
  .stat-grid{ grid-template-columns:repeat(2,1fr); }
  .stat:nth-child(3){ border-left:none; }
  .product-grid{ grid-template-columns:1fr; }
  .device-row{ grid-template-columns:1fr; }
  .device-photo{ max-width:280px; margin:0 auto; }
  .about-grid, .contact-grid{ grid-template-columns:1fr; gap:40px; }
  .form-row{ grid-template-columns:1fr; }
  .wrap, .header-row{ padding:0 20px; }
}