:root {
  color-scheme: dark;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: #0b1220;
  color: #d9e2ef;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: #0b1220;
}

a { color: rgba(14, 165, 233, 0.7); }
a:hover { color: #38bdf8; }

header {
  position: sticky;
  top: 0;
  z-index: 10;
  border-bottom: 1px solid rgba(71, 85, 105, 0.55);
  background: rgba(11, 18, 32, 0.9);
  backdrop-filter: blur(12px);
}

.header-content,
main,
footer {
  width: min(100% - 3rem, 48rem);
  margin: 0 auto;
}

.header-content {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 1rem 0;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-left: auto;
  color: #f8fafc;
  font-size: 0.875rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  text-decoration: none;
}

.brand svg {
  width: 1.5rem;
  height: 1.5rem;
  opacity: 0.7;
}

.back-link {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  color: #64748b;
  font-size: 0.875rem;
  text-decoration: none;
}

.back-link:hover { color: #e2e8f0; }
main { padding: 3.5rem 0; }

.eyebrow {
  margin: 0 0 0.75rem;
  color: #38bdf8;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

h1, h2 { color: #f8fafc; }

h1 {
  margin: 0;
  font-size: 1.875rem;
  letter-spacing: -0.035em;
  line-height: 1.2;
}

h2 {
  margin: 0 0 0.85rem;
  font-size: 1.125rem;
  letter-spacing: -0.015em;
}

p, li { font-size: 0.875rem; line-height: 1.625; }
p { margin: 0 0 1rem; }
ul { margin: 0; padding-left: 1.25rem; }
li + li { margin-top: 0.45rem; }

.intro { margin-top: 1rem; color: #94a3b8; }

.updated {
  margin-top: 1.5rem;
  color: #94a3b8;
  font-size: 0.875rem;
}

.notice {
  margin: 1.25rem 0 0;
  color: #94a3b8;
}

.notice strong { color: #cbd5e1; }
.notice p:last-child { margin-bottom: 0; }
section { margin-top: 2.5rem; }

.controller {
  color: #e2e8f0;
  font-style: normal;
}

footer {
  padding: 0 0 3rem;
  color: #64748b;
  font-size: 0.8125rem;
  line-height: 1.6;
}