@import url('https://fonts.googleapis.com/css2?family=Orbitron:wght@500;700;800&family=Inter:wght@400;500;600&display=swap');
 
:root {
  --background: #0A0F1C;
  --card: #111827;
  --foreground: #F8FAFC;
  --muted-foreground: #9CA6B8;
  --primary: #2563EB;
  --primary-glow: #60A5FA;
  --border: #243049;
}
 
* { box-sizing: border-box; }
 
html { scroll-behavior: smooth; }
 
body {
  margin: 0;
  background-color: var(--background);
  background-image:
    radial-gradient(ellipse 80% 50% at 50% -20%, rgba(37, 99, 235, 0.18), transparent),
    radial-gradient(ellipse 60% 50% at 80% 100%, rgba(96, 165, 250, 0.10), transparent);
  background-attachment: fixed;
  color: var(--foreground);
  font-family: 'Inter', system-ui, sans-serif;
  -webkit-font-smoothing: antialiased;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}
 
h1, h2, h3 {
  font-family: 'Orbitron', system-ui, sans-serif;
  letter-spacing: -0.01em;
  color: var(--foreground);
}
 
header.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background-color: rgba(10, 15, 28, 0.75);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border);
}
 
.header-inner {
  max-width: 1120px;
  margin: 0 auto;
  padding: 0 24px;
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
 
.logo-link { display: flex; align-items: center; gap: 8px; text-decoration: none; }
 
.logo-text-main {
  font-family: 'Orbitron', sans-serif;
  font-weight: 700;
  font-size: 1rem;
  letter-spacing: 0.18em;
  color: var(--foreground);
  line-height: 1;
}
 
.logo-text-sub {
  font-family: 'Orbitron', sans-serif;
  font-size: 0.56rem;
  letter-spacing: 0.3em;
  color: var(--primary-glow);
  margin-top: -1px;
}
 
.back-link {
  font-size: 0.875rem;
  color: var(--muted-foreground);
  text-decoration: none;
  transition: color 0.2s ease;
}
.back-link:hover { color: var(--foreground); }
 
main {
  flex: 1;
  max-width: 820px;
  width: 100%;
  margin: 0 auto;
  padding: 64px 24px 80px;
}
 
.doc-card {
  background-color: var(--card);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 48px;
  box-shadow: 0 10px 40px -10px rgba(37, 99, 235, 0.15);
}
 
.doc-card h1 {
  font-size: 1.75rem;
  margin: 0 0 8px;
}
 
.updated {
  font-size: 0.8rem;
  color: var(--muted-foreground);
  margin-bottom: 32px;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--border);
}
 
.doc-card h2 {
  font-size: 1.1rem;
  margin: 36px 0 12px;
  color: var(--primary-glow);
}
 
.doc-card p, .doc-card li {
  font-size: 0.95rem;
  line-height: 1.7;
  color: #D7DEEA;
}
 
.doc-card ul, .doc-card ol {
  padding-left: 1.25rem;
  margin: 0 0 16px;
}
 
.doc-card li { margin-bottom: 8px; }
 
.doc-card a { color: var(--primary-glow); text-decoration: none; }
.doc-card a:hover { text-decoration: underline; }
 
.doc-card strong { color: var(--foreground); }
 
footer.site-footer {
  border-top: 1px solid var(--border);
  padding: 24px;
  text-align: center;
  font-size: 0.75rem;
  color: var(--muted-foreground);
}
 
footer.site-footer a { color: var(--muted-foreground); }
footer.site-footer a:hover { color: var(--foreground); }