:root{
  --bg:#0b1220;
  --card:#0f1a2e;
  --muted:rgba(255,255,255,.72);
  --text:#ffffff;
  --line:rgba(255,255,255,.10);
  --pill:rgba(255,255,255,.10);
  --btn:rgba(255,255,255,.92);
  --btnText:#0b1220;
  --accent:rgba(83,150,255,.95);
}
*{box-sizing:border-box}
html,body{height:100%}
body{
  margin:0;
  background:radial-gradient(1200px 600px at 20% 10%, rgba(83,150,255,.18), transparent 55%),
             radial-gradient(900px 500px at 85% 25%, rgba(0,255,200,.10), transparent 55%),
             linear-gradient(180deg, #0b1220 0%, #070b14 100%);
  color:var(--text);
  font-family: -apple-system, BlinkMacSystemFont, Apple SD Gothic Neo, Noto Sans KR, Segoe UI, Roboto, Arial, sans-serif;
  line-height:1.5;
}
.wrap{max-width:1020px;margin:0 auto;padding:22px}
.topbar{position:sticky;top:0;z-index:50;background:rgba(7,11,20,.72);backdrop-filter: blur(10px);border-bottom:1px solid var(--line)}
.topbar-inner{display:flex;align-items:center;justify-content:space-between;gap:14px}
.brand{display:flex;align-items:center;gap:12px}
.logo{
  width:42px;height:42px;border-radius:12px;
  display:grid;place-items:center;
  background:linear-gradient(180deg, rgba(83,150,255,.95), rgba(83,150,255,.55));
  color:#061022;font-weight:900;letter-spacing:.6px;
}
.brand-name{font-weight:800}
.brand-sub{font-size:12px;color:var(--muted)}
.toplink{color:rgba(255,255,255,.88);text-decoration:none;font-size:13px;border:1px solid var(--line);padding:10px 12px;border-radius:999px}
.toplink:hover{border-color:rgba(255,255,255,.18)}
.card{
  background:linear-gradient(180deg, rgba(15,26,46,.92), rgba(15,26,46,.72));
  border:1px solid var(--line);
  border-radius:18px;
  padding:22px;
  box-shadow:0 12px 40px rgba(0,0,0,.30);
}
.hero{padding:26px}
.pill-row{display:flex;gap:10px;flex-wrap:wrap;margin-bottom:14px}
.pill{background:var(--pill);border:1px solid var(--line);padding:8px 10px;border-radius:999px;font-size:12px;color:rgba(255,255,255,.85)}
.h1{font-size:34px;line-height:1.18;margin:6px 0 10px}
.lead{font-size:16px;color:rgba(255,255,255,.92);margin:0 0 18px}
.muted{color:var(--muted)}
.small{font-size:12px}

.preview{margin-top:8px;border:1px solid rgba(83,150,255,.18);background:rgba(83,150,255,.08);border-radius:14px;padding:14px}
.preview-title{font-weight:900;margin-bottom:10px}
.preview-grid{display:grid;grid-template-columns:1fr 1fr;gap:10px}
.preview-item{border:1px solid rgba(255,255,255,.10);background:rgba(255,255,255,.03);border-radius:14px;padding:12px}
.pi-k{font-weight:900}
.pi-v{margin-top:4px;font-size:13px;color:rgba(255,255,255,.86)}

.grid{display:grid;grid-template-columns:1fr 1fr;gap:14px;margin-top:14px}
.grid2{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin:18px 0 8px}
.box{border:1px solid var(--line);border-radius:14px;padding:16px;background:rgba(255,255,255,.03)}
.h2{font-size:18px;margin:0 0 10px}
.list{margin:0;padding-left:18px;color:rgba(255,255,255,.90)}
.list li{margin:6px 0}
.olist{margin:0;padding-left:18px;color:rgba(255,255,255,.90)}
.olist li{margin:6px 0}
.chip{display:inline-block;padding:2px 8px;border-radius:999px;border:1px solid rgba(83,150,255,.35);background:rgba(83,150,255,.15);font-weight:900}
.copyrow{margin-top:12px;display:flex;flex-direction:column;gap:8px}
.copybtn{
  width:fit-content;
  border:1px solid rgba(255,255,255,.18);
  background:rgba(255,255,255,.06);
  color:rgba(255,255,255,.92);
  padding:10px 12px;
  border-radius:12px;
  cursor:pointer;
  font-weight:900;
}
.copybtn:hover{border-color:rgba(255,255,255,.26);background:rgba(255,255,255,.08)}
.copyhint{font-size:13px;color:rgba(255,255,255,.84)}
.cta{margin-top:18px;display:flex;flex-direction:column;align-items:flex-start;gap:10px}
.btn{
  display:inline-flex;align-items:center;justify-content:center;
  padding:14px 16px;border-radius:14px;
  background:linear-gradient(180deg, var(--btn), rgba(255,255,255,.78));
  color:var(--btnText);text-decoration:none;font-weight:900;
  min-width:240px;
}
.btn:hover{filter:brightness(1.03)}
.cta-note{font-size:13px;color:rgba(255,255,255,.90)}
.notice{margin-top:18px;border:1px solid rgba(83,150,255,.22);background:rgba(83,150,255,.08);border-radius:14px;padding:14px}
.notice-title{font-weight:900;margin-bottom:6px}
.notice-text{margin:0;color:rgba(255,255,255,.92)}
details{border:1px solid var(--line);border-radius:14px;padding:12px 14px;background:rgba(255,255,255,.03);margin:10px 0}
summary{cursor:pointer;font-weight:900}
details p{margin:10px 0 0;color:rgba(255,255,255,.88)}
.contact{display:grid;gap:8px;margin-top:12px}
.label{display:inline-block;min-width:64px;color:rgba(255,255,255,.78)}
.footer{margin-top:14px}
.footer-row{display:flex;align-items:center;justify-content:space-between;gap:14px;flex-wrap:wrap}
.footer-link{color:rgba(255,255,255,.88);text-decoration:none;font-size:13px}
.footer-note{margin-top:8px;color:rgba(255,255,255,.72);font-size:12px}

.learnimg{
  margin-top:18px;
  border:1px solid var(--line);
  border-radius:14px;
  padding:14px;
  background:rgba(255,255,255,.03);
}
.learnimg-title{font-weight:900;margin-bottom:10px}
.learnimg-photo{width:100%;height:auto;border-radius:12px;border:1px solid rgba(255,255,255,.10);display:block}
.learnimg-caption{margin-top:10px;font-size:13px;color:rgba(255,255,255,.84)}

.toast{
  position:fixed;left:50%;bottom:18px;transform:translateX(-50%);
  background:rgba(0,0,0,.78);
  border:1px solid rgba(255,255,255,.14);
  color:rgba(255,255,255,.92);
  padding:10px 12px;border-radius:12px;
  opacity:0;pointer-events:none;
  transition:opacity .2s ease, transform .2s ease;
  font-size:13px;
}
.toast.show{opacity:1;transform:translateX(-50%) translateY(-6px)}

@media (max-width: 860px){
  .grid{grid-template-columns:1fr}
  .grid2{grid-template-columns:1fr}
  .preview-grid{grid-template-columns:1fr}
  .h1{font-size:28px}
  .wrap{padding:16px}
}