:root{
  --primary:#001219;
  --accent:#EE9B00;
  --ink:#0d1b1f;
  --paper:#f5f4f1;
  --line:#c9c4ba;
  --muted:#4a5559;
}

*{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;
  font-family:'IBM Plex Sans KR', 'Noto Sans KR', sans-serif;
  font-display:swap;
  color:var(--ink);
  background:var(--paper);
  font-size:16px;
  line-height:1.7;
  -webkit-text-size-adjust:100%;
  overflow-x:hidden;
}

.sr-only{
  position:absolute;width:1px;height:1px;padding:0;margin:-1px;
  overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0;
}

a{color:inherit;}
img{max-width:100%;height:auto;display:block;}

/* header */
.site-header{
  background:var(--primary);
  border-bottom:1px solid var(--accent);
  position:sticky;
  top:0;
  z-index:10;
}
.header-inner{
  max-width:1280px;
  margin:0 auto;
  padding:14px 20px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  flex-wrap:wrap;
  gap:10px;
}
.brand{
  color:#fff;
  font-weight:700;
  font-size:1.15rem;
  text-decoration:none;
  letter-spacing:.02em;
  min-height:44px;
  display:flex;
  align-items:center;
}
.main-nav{
  display:flex;
  flex-wrap:wrap;
  gap:4px;
}
.main-nav a{
  color:#e8e6df;
  text-decoration:none;
  font-size:.92rem;
  padding:12px 10px;
  min-height:44px;
  display:flex;
  align-items:center;
  border-bottom:2px solid transparent;
}
.main-nav a:hover,
.main-nav a:focus-visible{
  color:var(--accent);
  border-bottom-color:var(--accent);
}

/* hero */
.hero-spec{
  background:var(--primary);
  color:#fff;
  padding:48px 20px 0;
}
.spec-tag{
  max-width:1080px;
  margin:0 auto;
  font-family:monospace;
  letter-spacing:.08em;
  font-size:.78rem;
  color:var(--accent);
  border:1px solid var(--accent);
  display:inline-block;
  padding:4px 10px;
  margin-bottom:18px;
}
.hero-spec h1{
  max-width:1080px;
  margin:0 auto 16px;
  font-size:clamp(1.7rem,4vw,2.6rem);
  line-height:1.3;
}
.hero-spec .lead{
  max-width:1080px;
  margin:0 auto 28px;
  color:#dcd9d0;
  font-size:1.02rem;
  max-width:760px;
}
.hero-spec picture{
  max-width:1080px;
  margin:0 auto;
  border-top:1px solid #23343b;
}
.hero-spec img{
  width:100%;
  border:1px solid #23343b;
  border-bottom:none;
}

/* main article */
main{max-width:1080px;margin:0 auto;padding:0 20px;}
article{padding-bottom:8px;}

.section-block{
  padding:40px 0;
  border-bottom:1px solid var(--line);
}
.section-block h2{
  display:flex;
  align-items:baseline;
  gap:12px;
  font-size:1.4rem;
  margin:0 0 18px;
  color:var(--primary);
}
.section-block .idx{
  font-family:monospace;
  font-size:.85rem;
  color:#fff;
  background:var(--primary);
  border:1px solid var(--accent);
  padding:2px 8px;
}
.section-block p{
  margin:0;
  max-width:74ch;
}
.section-block a{
  color:var(--primary);
  text-decoration:underline;
  text-underline-offset:3px;
  font-weight:600;
}
.section-block a:hover,
.section-block a:focus-visible{
  color:var(--accent);
  background:var(--primary);
}

/* table */
.table-wrap{
  overflow-x:auto;
  border:1px solid var(--line);
}
table{
  width:100%;
  border-collapse:collapse;
  min-width:480px;
  font-size:.95rem;
}
th,td{
  text-align:left;
  padding:12px 14px;
  border-bottom:1px solid var(--line);
  vertical-align:top;
}
thead th{
  background:var(--primary);
  color:#fff;
  font-weight:600;
}
tbody tr:nth-child(even){background:#eceae4;}

/* checklist */
.checklist{
  list-style:none;
  margin:0;
  padding:0;
  display:grid;
  gap:10px;
}
.checklist li{
  position:relative;
  padding:12px 14px 12px 40px;
  background:#fff;
  border:1px solid var(--line);
  min-height:44px;
  display:flex;
  align-items:center;
}
.checklist li::before{
  content:"";
  position:absolute;
  left:14px;
  top:50%;
  transform:translateY(-50%);
  width:14px;
  height:14px;
  border:2px solid var(--accent);
}

/* gallery */
.gallery-grid{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:16px;
}
.gallery-grid picture{
  border:1px solid var(--line);
}
.gallery-grid img{width:100%;}

/* caution */
.caution-block{
  border-left:4px solid var(--accent);
  padding-left:20px;
}

/* cta */
.cta-block{
  background:var(--primary);
  color:#fff;
  margin:36px 0;
  padding:40px 24px;
  text-align:center;
  border:1px solid var(--accent);
}
.cta-block h2{color:#fff;margin:0 0 10px;font-size:1.5rem;}
.cta-block p{margin:0 0 22px;color:#dcd9d0;}
.cta-btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  min-height:44px;
  min-width:180px;
  padding:12px 28px;
  background:var(--accent);
  color:var(--primary);
  font-weight:700;
  text-decoration:none;
  font-size:1.05rem;
}
.cta-btn:hover,
.cta-btn:focus-visible{
  background:#fff;
}

/* footer */
footer{
  background:var(--primary);
  color:#e8e6df;
  padding:36px 20px 26px;
}
footer nav{
  max-width:1080px;
  margin:0 auto 22px;
  display:flex;
  flex-wrap:wrap;
  gap:6px 14px;
}
footer nav a{
  color:#e8e6df;
  text-decoration:none;
  font-size:.9rem;
  min-height:44px;
  display:flex;
  align-items:center;
}
footer nav a:hover,
footer nav a:focus-visible{color:var(--accent);}
footer address{
  max-width:1080px;
  margin:0 auto;
  font-style:normal;
  font-size:.9rem;
  line-height:1.9;
  color:#c7c4bb;
  border-top:1px solid #23343b;
  padding-top:18px;
}
footer address a{color:var(--accent);text-decoration:underline;}
footer p{
  max-width:1080px;
  margin:18px auto 0;
  font-size:.8rem;
  color:#8a938f;
}

/* breakpoints */
@media (max-width:1024px){
  .hero-spec .lead{max-width:100%;}
}
@media (max-width:768px){
  .header-inner{flex-direction:column;align-items:flex-start;}
  .gallery-grid{grid-template-columns:1fr;}
  .section-block h2{font-size:1.25rem;}
}
@media (max-width:480px){
  .hero-spec{padding:32px 16px 0;}
  main{padding:0 16px;}
  .cta-block{padding:30px 16px;}
  .main-nav a{font-size:.85rem;padding:10px 8px;}
}