:root {
  --bg: #07111f;
  --panel: #0e1d30;
  --panel-2: #13263d;
  --text: #f5f8ff;
  --muted: #aab8ca;
  --line: rgba(255, 255, 255, .12);
  --cyan: #19d3ff;
  --blue: #6691ff;
  --green: #55e6ad;
  --max: 1120px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--text);
  background:
    radial-gradient(circle at 82% 2%, rgba(25, 211, 255, .16), transparent 28rem),
    radial-gradient(circle at 8% 28%, rgba(102, 145, 255, .13), transparent 25rem),
    var(--bg);
  font-family: Inter, "Noto Sans KR", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.7;
}
a { color: inherit; }
.wrap { width: min(var(--max), calc(100% - 40px)); margin: 0 auto; }
.nav {
  position: sticky; top: 0; z-index: 10;
  border-bottom: 1px solid var(--line);
  background: rgba(7, 17, 31, .82);
  backdrop-filter: blur(18px);
}
.nav-inner { min-height: 70px; display: flex; align-items: center; justify-content: space-between; gap: 24px; }
.brand { display: flex; align-items: center; gap: 12px; font-weight: 800; text-decoration: none; }
.mark {
  display: grid; place-items: center; width: 38px; height: 38px;
  border: 1px solid rgba(25, 211, 255, .5); border-radius: 11px;
  background: linear-gradient(145deg, rgba(25,211,255,.22), rgba(102,145,255,.13));
  color: var(--cyan); font-size: 19px;
}
.nav-links { display: flex; gap: 22px; color: var(--muted); font-size: 14px; }
.nav-links a { text-decoration: none; }
.nav-links a:hover { color: var(--text); }
.hero { padding: 110px 0 82px; text-align: center; }
.eyebrow { color: var(--cyan); font-weight: 750; letter-spacing: .12em; font-size: 13px; text-transform: uppercase; }
h1 { max-width: 880px; margin: 18px auto 22px; font-size: clamp(43px, 7vw, 78px); line-height: 1.04; letter-spacing: -.055em; }
.gradient { background: linear-gradient(90deg, var(--cyan), #a8c1ff); -webkit-background-clip: text; color: transparent; }
.lead { max-width: 760px; margin: 0 auto; color: var(--muted); font-size: clamp(17px, 2vw, 21px); }
.actions { display: flex; justify-content: center; flex-wrap: wrap; gap: 12px; margin-top: 35px; }
.button { display: inline-flex; align-items: center; justify-content: center; min-height: 48px; padding: 0 22px; border-radius: 12px; text-decoration: none; font-weight: 750; border: 1px solid var(--line); }
.button.primary { color: #02111a; background: var(--cyan); border-color: var(--cyan); }
.button.secondary { background: rgba(255,255,255,.04); }
.facts { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; margin-top: 58px; text-align: left; }
.fact, .card { border: 1px solid var(--line); background: linear-gradient(160deg, rgba(255,255,255,.055), rgba(255,255,255,.02)); border-radius: 18px; }
.fact { padding: 22px; }
.fact strong { display: block; margin-bottom: 4px; color: var(--green); }
section { padding: 82px 0; }
.section-head { max-width: 730px; margin-bottom: 34px; }
.section-head h2 { margin: 8px 0 12px; font-size: clamp(30px, 4vw, 47px); line-height: 1.15; letter-spacing: -.035em; }
.section-head p, .muted { color: var(--muted); }
.grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.card { padding: 27px; }
.card .num { color: var(--cyan); font-size: 13px; font-weight: 800; letter-spacing: .08em; }
.card h3 { margin: 14px 0 8px; }
.card p { margin: 0; color: var(--muted); }
.permissions { display: grid; grid-template-columns: 1.05fr .95fr; gap: 20px; align-items: stretch; }
.scope { padding: 30px; border-radius: 20px; border: 1px solid rgba(85,230,173,.32); background: rgba(85,230,173,.06); }
code { overflow-wrap: anywhere; color: #b9f9df; }
.checklist { margin: 0; padding: 26px 26px 26px 48px; border: 1px solid var(--line); border-radius: 20px; background: var(--panel); }
.checklist li { margin: 8px 0; color: var(--muted); }
.download { text-align: center; border: 1px solid var(--line); border-radius: 28px; padding: 58px 28px; background: linear-gradient(145deg, rgba(25,211,255,.1), rgba(102,145,255,.08)); }
.download h2 { margin: 0 0 12px; font-size: clamp(30px, 4vw, 46px); }
footer { padding: 36px 0 52px; border-top: 1px solid var(--line); color: var(--muted); font-size: 14px; }
.footer-row { display: flex; justify-content: space-between; gap: 24px; flex-wrap: wrap; }
.footer-links { display: flex; gap: 18px; flex-wrap: wrap; }
.legal { max-width: 850px; margin: 0 auto; padding: 70px 0 100px; }
.legal h1 { margin: 0 0 12px; text-align: left; font-size: clamp(38px, 5vw, 58px); }
.legal h2 { margin-top: 44px; font-size: 24px; }
.legal p, .legal li { color: var(--muted); }
.legal .notice { padding: 18px 20px; border: 1px solid var(--line); border-radius: 14px; background: var(--panel); }
@media (max-width: 780px) {
  .nav-links { display: none; }
  .hero { padding-top: 78px; }
  .facts, .grid, .permissions { grid-template-columns: 1fr; }
}