:root{
  --bg:#0b0f1a; --bg2:#111729; --card:#161d33; --line:#26304f;
  --text:#e8ecf8; --muted:#9aa5c4; --red:#ff4d5e; --blue:#4d8dff; --gold:#ffc83d;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;scroll-padding-top:70px}
body{background:var(--bg);color:var(--text);font-family:"Pretendard","Noto Sans KR","Malgun Gothic",system-ui,sans-serif;line-height:1.7}
a{color:inherit;text-decoration:none}
code{background:#0006;padding:2px 8px;border-radius:6px;font-family:Consolas,monospace}

.nav{position:fixed;top:0;left:0;right:0;z-index:10;display:flex;align-items:center;justify-content:space-between;padding:12px 24px;background:#0b0f1acc;backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
.logo{font-weight:800;display:flex;align-items:center;gap:10px}
.logo small{font-weight:500;color:var(--muted);font-size:.8rem}
.ball{width:20px;height:20px;border-radius:50%;background:linear-gradient(var(--red) 46%,#222 46% 54%,#fff 54%);border:2px solid #222;display:inline-block}
.nav nav{display:flex;gap:22px}
.nav nav a{color:var(--muted);font-size:.95rem;transition:.2s}
.nav nav a:hover{color:#fff}
.menu-btn{display:none;background:none;border:0;color:#fff;font-size:1.5rem;cursor:pointer}

.hero{min-height:100vh;display:grid;place-items:center;text-align:center;padding:120px 24px 60px;
  background:radial-gradient(circle at 20% 20%,#ff4d5e33,transparent 40%),radial-gradient(circle at 80% 70%,#4d8dff33,transparent 45%),var(--bg)}
.hero-inner{max-width:760px}
.eyebrow{letter-spacing:.2em;color:var(--gold);font-size:.8rem;font-weight:700;margin-bottom:16px}
h1{font-size:clamp(2rem,5.5vw,3.6rem);line-height:1.25;font-weight:900}
.grad{background:linear-gradient(90deg,var(--red),var(--gold),var(--blue));-webkit-background-clip:text;background-clip:text;color:transparent}
.lead{color:var(--muted);margin:20px 0 32px;font-size:1.1rem}
.ip-box{display:inline-flex;align-items:center;gap:12px;padding:10px 10px 10px 18px;background:var(--card);border:1px solid var(--line);border-radius:14px;flex-wrap:wrap;justify-content:center}
.ip-label{color:var(--muted);font-size:.85rem}
.ip-box code{font-size:1.1rem;color:var(--gold)}
#copy{background:var(--blue);color:#fff;border:0;padding:8px 16px;border-radius:9px;font-weight:700;cursor:pointer}
#copy:hover{filter:brightness(1.1)}
.cta{display:flex;gap:12px;justify-content:center;margin-top:24px;flex-wrap:wrap}
.btn{padding:13px 28px;border-radius:12px;font-weight:700;transition:.2s}
.btn.primary{background:linear-gradient(90deg,var(--red),#ff7a4d);color:#fff}
.btn.ghost{border:1px solid var(--line);background:var(--card)}
.btn:hover{transform:translateY(-2px)}
.status{margin-top:18px;color:var(--muted);font-size:.9rem}

.section{max-width:1100px;margin:0 auto;padding:90px 24px}
.alt{max-width:none;background:var(--bg2)}
.alt>*{max-width:1052px;margin-left:auto;margin-right:auto}
h2{font-size:2rem;margin-bottom:8px;text-align:center}
.sub{text-align:center;color:var(--muted);margin-bottom:40px}
.grid{display:grid;gap:20px;margin-top:32px}
.two{grid-template-columns:repeat(2,1fr)}
.three{grid-template-columns:repeat(3,1fr)}
.card{background:var(--card);border:1px solid var(--line);border-radius:16px;padding:28px;transition:.25s}
.card:hover{transform:translateY(-4px);border-color:var(--blue)}
.card h3{margin-bottom:8px}
.card p{color:var(--muted)}
.ico{font-size:2rem;margin-bottom:10px}

.tiers{list-style:none;display:grid;grid-template-columns:repeat(5,1fr);gap:14px}
.tiers li{padding:26px 12px;text-align:center;border-radius:14px;background:var(--card);border:1px solid var(--line);border-top:4px solid var(--c)}
.tiers b{display:block;font-size:1.1rem}
.tiers span{color:var(--muted);font-size:.85rem}
.t1{--c:#ff4d5e}.t2{--c:#4d8dff}.t3{--c:#ffc83d}.t4{--c:#b04dff}.t5{--c:#3dffb0}

.steps{display:grid;gap:16px;margin-top:32px}
.step{display:flex;gap:20px;align-items:flex-start;background:var(--card);border:1px solid var(--line);border-radius:16px;padding:24px}
.step>span{flex:none;width:44px;height:44px;border-radius:50%;display:grid;place-items:center;font-weight:800;background:linear-gradient(135deg,var(--red),var(--blue))}
.step p{color:var(--muted)}
.note{margin-top:20px;color:var(--muted);font-size:.9rem;text-align:center}

.rules{max-width:700px;margin:32px auto 0;display:grid;gap:12px;list-style:none;counter-reset:r}
.rules li{counter-increment:r;background:var(--card);border:1px solid var(--line);border-radius:12px;padding:14px 18px 14px 56px;position:relative}
.rules li::before{content:counter(r);position:absolute;left:18px;color:var(--gold);font-weight:800}

details{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:16px 20px;margin-top:12px}
summary{cursor:pointer;font-weight:700}
details p{color:var(--muted);margin-top:10px}

footer{text-align:center;padding:40px 24px;border-top:1px solid var(--line);color:var(--muted)}
.fine{font-size:.75rem;margin-top:8px;opacity:.7}

@media(max-width:800px){
  .menu-btn{display:block}
  .nav nav{display:none;position:absolute;top:100%;left:0;right:0;flex-direction:column;gap:0;background:var(--bg2);border-bottom:1px solid var(--line)}
  .nav nav.open{display:flex}
  .nav nav a{padding:14px 24px}
  .two,.three,.tiers{grid-template-columns:1fr}
  .section{padding:64px 20px}
}