:root {
  --bg: #0a0c0a;
  --bg2: #12150f;
  --card: #161a15;
  --border: #2a2f26;
  --text: #f4f7f4;
  --muted: #9ba59b;
  --faint: #636b61;
  --lime: #c6fe1e;
  --ink: #0c0f0c;
}
* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Inter", "Segoe UI", Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}
.wrap { max-width: 760px; margin: 0 auto; padding: 0 22px; }

header.nav {
  position: sticky; top: 0; z-index: 10;
  backdrop-filter: blur(14px);
  background: rgba(10,12,10,0.72);
  border-bottom: 1px solid var(--border);
}
.nav-inner { display: flex; align-items: center; gap: 12px; height: 60px; }
.logo {
  width: 32px; height: 32px; border-radius: 9px;
  object-fit: cover; flex: 0 0 auto;
}
.hero-logo { width: 96px; height: 96px; border-radius: 22px; margin-bottom: 24px; }
.brand { font-weight: 700; font-size: 17px; letter-spacing: -0.2px; }
.nav-links { margin-left: auto; display: flex; gap: 18px; }
.nav-links a { color: var(--muted); text-decoration: none; font-size: 14px; font-weight: 500; }
.nav-links a:hover { color: var(--text); }

.hero { padding: 80px 0 50px; text-align: center; }
.hero .badge {
  display: inline-block; font-size: 12px; font-weight: 600; color: var(--ink);
  background: var(--lime); padding: 4px 12px; border-radius: 999px; margin-bottom: 22px;
}
.hero h1 { font-size: 44px; line-height: 1.1; letter-spacing: -1.2px; margin-bottom: 16px; }
.hero p { color: var(--muted); font-size: 18px; max-width: 520px; margin: 0 auto; }
.hero .cta { margin-top: 30px; display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; }
.btn {
  text-decoration: none; font-weight: 600; font-size: 15px; padding: 12px 22px; border-radius: 999px;
}
.btn-primary { background: var(--lime); color: var(--ink); }
.btn-ghost { border: 1px solid var(--border); color: var(--text); }

.doc { padding: 56px 0 90px; }
.doc h1 { font-size: 34px; letter-spacing: -0.8px; margin-bottom: 6px; }
.doc .updated { color: var(--faint); font-size: 14px; margin-bottom: 36px; }
.doc h2 { font-size: 20px; margin: 34px 0 10px; letter-spacing: -0.3px; }
.doc p, .doc li { color: #d6dcd4; font-size: 15.5px; }
.doc ul { margin: 8px 0 8px 22px; }
.doc li { margin: 6px 0; }
.doc a { color: var(--lime); }
.callout {
  background: var(--card); border: 1px solid var(--border); border-radius: 14px;
  padding: 16px 18px; margin: 22px 0; color: #d6dcd4; font-size: 15px;
}
.callout strong { color: var(--text); }

footer {
  border-top: 1px solid var(--border); padding: 30px 0; color: var(--faint); font-size: 13px;
}
.footer-inner { display: flex; gap: 16px; flex-wrap: wrap; align-items: center; }
.footer-inner a { color: var(--muted); text-decoration: none; }
.footer-inner a:hover { color: var(--text); }
.footer-inner .sp { margin-left: auto; }

@media (max-width: 560px) {
  .hero h1 { font-size: 34px; }
  .doc h1 { font-size: 28px; }
}