:root {
  color-scheme: dark;
  --bg: #0b1020;
  --panel: #121a2d;
  --panel-2: #18233c;
  --text: #edf2ff;
  --muted: #9fb0d0;
  --line: rgba(255,255,255,0.08);
  --accent: #7dd3fc;
  --accent-2: #c084fc;
  --shadow: 0 18px 40px rgba(0,0,0,0.28);
}
* { box-sizing: border-box; }
html, body { margin: 0; min-height: 100%; background: radial-gradient(circle at top, #16213b 0%, var(--bg) 55%); color: var(--text); font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif; }
a { color: var(--accent); }
img { max-width: 100%; border-radius: 14px; }
.app-shell { display: grid; grid-template-columns: 320px minmax(0, 1fr); min-height: 100vh; }
.sidebar { padding: 32px 24px; border-right: 1px solid var(--line); background: rgba(7, 12, 24, 0.55); backdrop-filter: blur(12px); }
.brand-block { margin-bottom: 28px; }
.eyebrow { margin: 0 0 8px; text-transform: uppercase; letter-spacing: .16em; font-size: 12px; color: var(--accent); }
.subtitle, .nav-label { color: var(--muted); }
.nav-list { list-style: none; padding: 0; margin: 12px 0 0; display: flex; flex-direction: column; gap: 10px; }
.nav-link { display: block; width: 100%; text-decoration: none; color: var(--text); padding: 12px 14px; border: 1px solid var(--line); border-radius: 14px; background: rgba(255,255,255,0.02); transition: .18s ease; }
.nav-link:hover, .nav-link.active { border-color: rgba(125, 211, 252, 0.55); background: linear-gradient(135deg, rgba(125, 211, 252, 0.12), rgba(192, 132, 252, 0.12)); transform: translateY(-1px); }
.nav-link small { display: block; margin-top: 4px; color: var(--muted); }
.content { padding: 32px; }
.content-header { display: flex; justify-content: space-between; gap: 16px; align-items: flex-start; margin-bottom: 24px; }
.header-actions { display: flex; gap: 10px; flex-wrap: wrap; }
.ghost-button { display: inline-flex; align-items: center; justify-content: center; gap: 8px; border-radius: 999px; border: 1px solid var(--line); background: rgba(255,255,255,0.03); color: var(--text); padding: 10px 14px; text-decoration: none; cursor: pointer; }
.ghost-button:disabled { opacity: .45; cursor: not-allowed; }
.markdown-body { max-width: 920px; background: linear-gradient(180deg, rgba(18, 26, 45, 0.96), rgba(14, 21, 36, 0.96)); border: 1px solid var(--line); border-radius: 24px; padding: 28px; box-shadow: var(--shadow); }
.markdown-body h1, .markdown-body h2, .markdown-body h3 { line-height: 1.15; }
.markdown-body p, .markdown-body li { color: #dbe7ff; line-height: 1.75; }
.markdown-body ul { padding-left: 22px; }
.markdown-body blockquote { margin: 1.2rem 0; padding: 0.2rem 1rem; border-left: 4px solid var(--accent); background: rgba(125, 211, 252, 0.08); border-radius: 10px; color: #d9f5ff; }
.markdown-body code { background: rgba(255,255,255,0.08); padding: 2px 6px; border-radius: 6px; }
.markdown-body pre { background: #0a1020; padding: 14px; border-radius: 16px; overflow: auto; }
.pager { display: flex; justify-content: space-between; gap: 12px; margin-top: 22px; max-width: 920px; }
@media (max-width: 920px) {
  .app-shell { grid-template-columns: 1fr; }
  .sidebar { border-right: 0; border-bottom: 1px solid var(--line); }
  .content { padding: 20px; }
  .content-header { flex-direction: column; }
}