:root{
  --point:#4e0a0f;
  --bg:#0c0c0d;
  --bg2:#111113;
  --text:#f4f4f6;
  --shadow: 0 18px 50px rgba(0,0,0,.45);
  --radius: 18px;
  --container: 1180px;
}
*{ box-sizing:border-box; }
html,body{ margin:0; padding:0; }
body{
  font-family:"Pretendard", system-ui, -apple-system, Segoe UI, Roboto, "Noto Sans KR", Arial, sans-serif;
  background: radial-gradient(1200px 700px at 20% 5%, rgba(78,10,15,.35), transparent 55%),
              radial-gradient(900px 600px at 80% 15%, rgba(78,10,15,.25), transparent 60%),
              linear-gradient(180deg, var(--bg), var(--bg2));
  color: var(--text);
  overflow-x:hidden;
}
a{ color:inherit; text-decoration:none; }
img{ width:100%; height:100%; display:block; object-fit:cover; }
button{ font-family:inherit; }
.container{ width:min(var(--container), calc(100% - 40px)); margin:0 auto; }

.skip{ position:absolute; left:-9999px; width:1px; height:1px; overflow:hidden; }
.skip:focus{ left:12px; top:12px; width:auto; height:auto; padding:10px 12px; background:#fff; color:#000; border-radius:10px; z-index:9999; }

/* Header */
.site-header{
  position:sticky; top:0; z-index:1000;
  backdrop-filter: blur(14px);
  background: rgba(12,12,13,.55);
  border-bottom:1px solid rgba(255,255,255,.08);
}
.header-inner{
  display:flex; align-items:center; justify-content:space-around;
  gap:18px; height:72px;
}
.brand{ display:flex; align-items:center; gap:10px; }
.brand-mark{
  width:14px; height:14px; border-radius:5px;
  background: var(--point);
  box-shadow: 0 0 0 6px rgba(78,10,15,.18);
}
.brand-name{ font-weight:800; letter-spacing:.5px; }
.gnb{ display:flex; align-items:center; gap:18px; flex-wrap:wrap; }
.gnb a{ font-size:14px; color: rgba(255,255,255,.86); opacity:.9; transition:.2s ease; }
.gnb a:hover{ opacity:1; }
.gnb-cta{
  padding:10px 12px; border-radius:999px;
  background: rgba(78,10,15,.22);
  border:1px solid rgba(78,10,15,.55);
}
.mnav-btn{
  display:none;
  width:44px; height:44px; border-radius:12px;
  border:1px solid rgba(255,255,255,.12);
  background: rgba(255,255,255,.06);
  color:#fff;
}
.mnav{ display:none; border-top:1px solid rgba(255,255,255,.08); background: rgba(12,12,13,.7); }
.mnav-inner{
  width:min(var(--container), calc(100% - 40px));
  margin:0 auto; padding:14px 0 18px;
  display:grid; grid-template-columns: 1fr 1fr; gap:10px;
}
.mnav-inner a{
  padding:12px 12px; border-radius:14px;
  background: rgba(255,255,255,.06);
  border:1px solid rgba(255,255,255,.10);
  font-size:14px;
}
.mnav-cta{ background: rgba(78,10,15,.22) !important; border-color: rgba(78,10,15,.55) !important; }

/* Common */
.tag{
  display:inline-flex; align-items:center;
  padding:8px 10px; border-radius:999px;
  background: rgba(78,10,15,.18);
  border:1px solid rgba(78,10,15,.55);
  font-size:12px; letter-spacing:.18em;
  color: rgba(255,255,255,.88);
  width:fit-content;
}
.btn{
  display:inline-flex; align-items:center; gap:10px;
  padding:12px 16px; border-radius:999px;
  border:1px solid rgba(255,255,255,.14);
  background: rgba(255,255,255,.06);
  color:#fff; transition:.2s ease; white-space:nowrap;
  cursor:pointer;
}
.btn:hover{ transform: translateY(-1px); background: rgba(255,255,255,.09); }
.btn.primary{
  background: var(--point);
  border-color: transparent;
  box-shadow: 0 14px 36px rgba(78,10,15,.35);
}
.btn.ghost{ background: rgba(255,255,255,.03); }
.btn.mini{ padding: 10px 12px; font-size: 13px; }

/* Hero */
.page-hero{
  position:relative;
  min-height: 62vh;
  display:flex; align-items:center;
  overflow:hidden;
  border-bottom:1px solid rgba(255,255,255,.08);
}
.page-hero-bg{ position:absolute; inset:0; opacity:.66; transform: scale(1.08); }
.page-hero-bg::after{
  content:"";
  position:absolute; inset:0;
  background: linear-gradient(90deg, rgba(12,12,13,.92) 0%, rgba(12,12,13,.62) 55%, rgba(12,12,13,.92) 100%);
}
.page-hero-inner{
  position:relative;
  display:grid; grid-template-columns: 1.1fr .9fr;
  gap:22px;
  padding: 86px 0 58px;
}
.kicker{
  display:inline-flex; align-items:center; gap:10px;
  padding:10px 12px; border-radius:999px;
  background: rgba(255,255,255,.06);
  border:1px solid rgba(255,255,255,.10);
  width:fit-content; color: rgba(255,255,255,.86);
}
.page-hero-copy h1{
  margin: 16px 0 10px;
  font-size: clamp(36px, 5vw, 52px);
  letter-spacing: -0.6px;
  line-height: 1.08;
}
.page-hero-copy .desc{ margin:0 0 16px; color: rgba(255,255,255,.78); line-height:1.6; }
.hero-actions{ display:flex; gap:10px; flex-wrap:wrap; }
.hero-badges{ margin-top:14px; display:flex; gap:10px; flex-wrap:wrap; }
.hb{
  display:inline-flex; align-items:center; gap:10px;
  padding:10px 12px; border-radius:999px;
  background: rgba(255,255,255,.05);
  border:1px solid rgba(255,255,255,.10);
  font-size:13px; color: rgba(255,255,255,.82);
}
.hero-card{
  border-radius: var(--radius);
  overflow:hidden;
  border:1px solid rgba(255,255,255,.12);
  background: rgba(255,255,255,.06);
  box-shadow: var(--shadow);
}
.hc-top{
  padding: 18px;
  background: radial-gradient(600px 240px at 30% 20%, rgba(78,10,15,.35), transparent 60%);
}
.hc-top h3{ margin: 10px 0 8px; font-size:18px; }
.hc-top p{ margin:0; color: rgba(255,255,255,.72); line-height:1.6; }
.hc-bottom{
  padding: 18px;
  display:grid;
  gap: 10px;
  border-top:1px solid rgba(255,255,255,.10);
}
.meta{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap: 10px;
}
.meta span{ color: rgba(255,255,255,.62); }
.meta b{ font-weight: 900; }

.hero-scroll{
  position:absolute; left:50%; bottom:18px;
  transform: translateX(-50%);
  display:flex; align-items:center; gap:10px;
  color: rgba(255,255,255,.70);
  font-size:12px; letter-spacing:.2em;
  text-transform:uppercase; opacity:.9;
}
.hero-scroll i{ animation: bounce 1.4s ease-in-out infinite; }
@keyframes bounce{ 0%,100%{transform:translateY(0)} 50%{transform:translateY(5px)} }

/* Doc layout */
.doc{ padding: 78px 0; }
.doc-inner{
  display:grid;
  grid-template-columns: 340px 1fr;
  gap: 14px;
  align-items:start;
}
.toc-card{
  position:sticky;
  top: 88px;
  border-radius: 22px;
  border:1px solid rgba(255,255,255,.10);
  background: rgba(255,255,255,.04);
  overflow:hidden;
}
.toc-title{
  padding: 16px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  border-bottom:1px solid rgba(255,255,255,.08);
}
.pill{
  padding: 8px 10px;
  border-radius: 999px;
  border:1px solid rgba(78,10,15,.55);
  background: rgba(78,10,15,.18);
  font-size: 12px;
}
.toc-links{
  padding: 10px;
  display:grid;
  gap: 6px;
}
.toc-link{
  padding: 12px 12px;
  border-radius: 16px;
  border:1px solid rgba(255,255,255,.10);
  background: rgba(255,255,255,.03);
  color: rgba(255,255,255,.80);
  font-size: 13.5px;
}
.toc-link.active{
  border-color: rgba(78,10,15,.6);
  background: rgba(78,10,15,.12);
  color:#fff;
}
.toc-actions{
  padding: 12px;
  display:flex;
  gap: 8px;
  border-top:1px solid rgba(255,255,255,.08);
}

.article{
  border-radius: 22px;
  border:1px solid rgba(255,255,255,.10);
  background: rgba(255,255,255,.04);
  padding: 18px;
}
.article-head h2{ margin: 10px 0 6px; font-size: 26px; }
.sub{ margin:0; color: rgba(255,255,255,.70); line-height:1.6; }

/* Accordion */
.acc{ margin-top: 14px; display:grid; gap: 10px; }
.acc-item{
  border-radius: 18px;
  border:1px solid rgba(255,255,255,.10);
  background: rgba(255,255,255,.03);
  overflow:hidden;
}
.acc-btn{
  width:100%;
  padding: 16px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap: 10px;
  border:none;
  background: transparent;
  color:#fff;
  cursor:pointer;
}
.acc-btn span{ font-weight: 900; letter-spacing: -.2px; }
.acc-panel{
  display:none;
  padding: 0 16px 16px;
  color: rgba(255,255,255,.74);
  line-height: 1.8;
}
.acc-panel ul{ margin: 0; padding-left: 18px; }
.acc-item.open .acc-panel{ display:block; }
.acc-item.open .acc-btn i{ transform: rotate(180deg); }
.acc-btn i{ transition: .2s ease; }

/* History */
.history{ margin-top: 22px; }
.history-head h3{ margin:0; font-size: 20px; }
.history-head p{ margin:8px 0 0; color: rgba(255,255,255,.70); line-height:1.6; }
.timeline{
  margin-top: 12px;
  display:grid;
  gap: 10px;
}
.tl-item{
  display:grid;
  grid-template-columns: 16px 1fr;
  gap: 10px;
  align-items:start;
}
.dot{
  width:12px; height:12px;
  border-radius: 50%;
  margin-top: 10px;
  background: rgba(78,10,15,1);
  box-shadow: 0 0 0 6px rgba(78,10,15,.18);
}
.box{
  padding: 14px;
  border-radius: 18px;
  border:1px solid rgba(255,255,255,.10);
  background: rgba(255,255,255,.03);
}
.box b{ display:block; }
.box span{ color: rgba(255,255,255,.62); font-size: 12.5px; }
.box p{ margin: 8px 0 0; color: rgba(255,255,255,.72); }

/* Doc CTA */
.doc-cta{ margin-top: 18px; }
.doc-cta-card{
  padding: 16px;
  border-radius: 22px;
  border:1px solid rgba(255,255,255,.10);
  background: radial-gradient(700px 260px at 30% 20%, rgba(78,10,15,.25), rgba(255,255,255,.03));
  display:flex;
  align-items:flex-end;
  justify-content:space-between;
  gap: 12px;
  flex-wrap:wrap;
}
.doc-cta-card h3{ margin: 10px 0 6px; }
.doc-cta-card p{ margin:0; color: rgba(255,255,255,.72); line-height:1.6; }
.doc-cta-actions{ display:flex; gap:10px; flex-wrap:wrap; }

/* Float Top */
.float-top{
  position:fixed;
  right:18px; bottom:18px;
  width:52px; height:52px;
  border-radius: 18px;
  border:1px solid rgba(255,255,255,.12);
  background: rgba(255,255,255,.06);
  color:#fff;
  cursor:pointer;
  backdrop-filter: blur(10px);
  display:none;
  z-index: 1300;
}
.float-top.show{ display:inline-flex; align-items:center; justify-content:center; }

/* Reveal */
.reveal{
  opacity:0;
  transform: translateY(18px);
  transition: opacity .7s ease, transform .7s ease;
  will-change: opacity, transform;
}
.reveal.show{ opacity:1; transform: translateY(0); }
.reveal.right{ transform: translateX(18px); }
.reveal.show.right{ transform: translateX(0); }

/* Responsive */
@media (max-width: 1024px){
  .gnb{ display:none; }
  .mnav-btn{ display:inline-flex; align-items:center; justify-content:center; }
  .page-hero-inner{ grid-template-columns: 1fr; padding: 78px 0 58px; }
  .doc-inner{ grid-template-columns: 1fr; }
  .toc-card{ position:relative; top:auto; }
}
@media (max-width: 560px){
  .header-inner{ height:64px; }
  .page-hero{ min-height: 58vh; }
}

/* Footer */
.site-footer{
  border-top:1px solid rgba(255,255,255,.08);
  padding: 34px 0 22px;
  background: rgba(0,0,0,.20);
}
.footer-inner{
  display:flex;
  align-items:flex-start;
  justify-content:space-around;
  gap: 18px;
}
.footer-left p{
  margin: 8px 0 0;
  color: rgba(255,255,255,.62);
  line-height:1.6;
  font-size: 13.5px;
}
.footer-brand{ font-weight: 900; letter-spacing: .4px; }
.footer-links{
  display:flex;
  gap:12px;
  justify-content:flex-end;
}
.footer-links a{
  color: rgba(255,255,255,.72);
  font-size: 13.5px;
  opacity:.9;
}
.footer-links a:hover{ opacity:1; }
.footer-sns{
  margin-top: 12px;
  display:flex;
  gap:12px;
  justify-content:flex-end;
}
.footer-sns a{
  width:40px; height:40px;
  border-radius: 14px;
  background: rgba(255,255,255,.06);
  border:1px solid rgba(255,255,255,.10);
  display:flex;
  align-items:center;
  justify-content:center;
  transition:.2s ease;
}
.footer-sns a:hover{
  transform: translateY(-2px);
  border-color: rgba(78,10,15,.6);
  background: rgba(78,10,15,.14);
}
.footer-bottom{
  margin-top: 18px;
  padding-top: 16px;
  border-top:1px solid rgba(255,255,255,.08);
  color: rgba(255,255,255,.55);
  font-size: 12.5px;
}

/* Print */
@media print{
  .site-header, .toc, .float-top, .hero-actions, .hero-scroll, .site-footer { display:none !important; }
  body{ background:#fff; color:#000; }
  .article{ background:#fff; border: none; }
  .acc-item{ background:#fff; border:1px solid #ddd; }
  .acc-panel{ display:block !important; color:#000; }
}