:root {
  --bg-0: #06060c;
  --bg-1: #0e0e18;
  --glass: rgba(255, 255, 255, 0.06);
  --glass-border: rgba(255, 255, 255, 0.12);
  --text: #f4f4f8;
  --muted: rgba(244, 244, 248, 0.58);
  --accent: #a78bfa;
  --link: #67e8f9;
  --border: rgba(255, 255, 255, 0.1);
  --safe-bottom: env(safe-area-inset-bottom, 0px);
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  min-height: 100vh;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  color: var(--text);
  background:
    radial-gradient(ellipse 80% 50% at 20% -10%, rgba(167, 139, 250, 0.18), transparent 55%),
    linear-gradient(180deg, var(--bg-1) 0%, var(--bg-0) 100%);
  padding: 12px 16px calc(24px + var(--safe-bottom));
  line-height: 1.6;
  font-size: 15px;
}

.topbar {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 14px;
}

.back-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--muted);
  text-decoration: none;
  font-size: 0.85rem;
  font-weight: 600;
  padding: 8px 12px;
  border-radius: 999px;
  border: 1px solid var(--glass-border);
  background: var(--glass);
  backdrop-filter: blur(12px);
}

.back-link:hover { color: var(--accent); }

.page-title {
  margin: 0 0 12px;
  font-size: 1.2rem;
  font-weight: 700;
}

.content-shell {
  background: var(--glass);
  border: 1px solid var(--glass-border);
  backdrop-filter: blur(18px);
  border-radius: 18px;
  padding: 16px 18px;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.35);
}

.doc-md :first-child { margin-top: 0; }

.doc-md h1 {
  font-size: 1.15rem;
  font-weight: 700;
  line-height: 1.35;
  margin: 0 0 0.75rem;
}

.doc-md h2 {
  font-size: 1rem;
  font-weight: 700;
  margin: 1.2rem 0 0.55rem;
  padding-top: 0.25rem;
  border-top: 1px solid var(--border);
}

.doc-md h2:first-of-type { border-top: none; padding-top: 0; }

.doc-md h3 {
  font-size: 0.95rem;
  font-weight: 600;
  margin: 0.9rem 0 0.4rem;
  opacity: 0.92;
}

.doc-md p { margin: 0.45rem 0 0.7rem; }

.doc-md ul, .doc-md ol {
  margin: 0.35rem 0 0.75rem;
  padding-left: 1.2rem;
}

.doc-md li { margin: 0.3rem 0; }

.doc-md a { color: var(--link); }

.doc-md code {
  font-size: 0.88em;
  background: rgba(255, 255, 255, 0.08);
  padding: 0.1em 0.35em;
  border-radius: 4px;
}

.doc-md strong { font-weight: 700; }

.doc-md em { font-style: italic; opacity: 0.88; }

.card-grid {
  display: grid;
  gap: 12px;
}

.info-card {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 14px;
  padding: 14px 16px;
}

.info-card h2 {
  margin: 0 0 8px;
  font-size: 1rem;
  border: none;
  padding: 0;
}

.info-card p {
  margin: 0;
  color: var(--muted);
  font-size: 0.9rem;
}