:root {
  --bg: #0e1116;
  --bg-elev: #161b22;
  --bg-soft: #1c2230;
  --fg: #e6edf3;
  --fg-dim: #8b949e;
  --accent: #58a6ff;
  --accent-soft: rgba(88, 166, 255, 0.15);
  --border: #30363d;
  --code-bg: #0a0d12;
  --warn: #f6a13d;
  --broken: #f85149;
  --mono: ui-monospace, SFMono-Regular, "JetBrains Mono", Menlo, Consolas, monospace;
}

@media (prefers-color-scheme: light) {
  :root {
    --bg: #fafbfc;
    --bg-elev: #ffffff;
    --bg-soft: #f1f3f5;
    --fg: #1f2328;
    --fg-dim: #59636e;
    --accent: #0969da;
    --accent-soft: rgba(9, 105, 218, 0.1);
    --border: #d1d9e0;
    --code-bg: #f6f8fa;
    --broken: #cf222e;
  }
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  display: grid;
  grid-template-columns: 320px 1fr;
  min-height: 100vh;
  font-family: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  background: var(--bg);
  color: var(--fg);
  line-height: 1.55;
}

.sidebar {
  background: var(--bg-elev);
  border-right: 1px solid var(--border);
  padding: 1rem;
  position: sticky;
  top: 0;
  max-height: 100vh;
  overflow-y: auto;
}
.sidebar header { margin-bottom: 1rem; }
.brand {
  font-weight: 700;
  font-size: 1.05rem;
  text-decoration: none;
  color: var(--fg);
  letter-spacing: -0.01em;
}
#filter {
  width: 100%;
  padding: 0.45rem 0.65rem;
  margin-bottom: 0.75rem;
  background: var(--bg-soft);
  color: var(--fg);
  border: 1px solid var(--border);
  border-radius: 6px;
  font-size: 0.875rem;
}
#filter:focus { outline: none; border-color: var(--accent); }

.notelist { list-style: none; margin: 0; padding: 0; }
.notelist li a {
  display: block;
  padding: 0.45rem 0.65rem;
  border-radius: 6px;
  color: var(--fg-dim);
  text-decoration: none;
  font-size: 0.875rem;
  margin-bottom: 0.15rem;
  word-break: break-word;
}
.notelist li a:hover { background: var(--bg-soft); color: var(--fg); }
.notelist li.active a { background: var(--accent-soft); color: var(--accent); font-weight: 600; }

.content { padding: 2rem 2.5rem; max-width: 1000px; }
.page-header { margin-bottom: 1.5rem; padding-bottom: 1rem; border-bottom: 1px solid var(--border); }
.page-header h1 { margin: 0 0 0.5rem; font-size: 1.85rem; letter-spacing: -0.02em; }

.meta { font-size: 0.85rem; color: var(--fg-dim); }
.meta summary { cursor: pointer; user-select: none; }
.meta dl {
  display: grid;
  grid-template-columns: max-content 1fr;
  gap: 0.25rem 1rem;
  margin-top: 0.5rem;
  padding: 0.75rem;
  background: var(--bg-soft);
  border-radius: 6px;
}
.meta dt { font-weight: 600; color: var(--fg); font-family: var(--mono); font-size: 0.8rem; }
.meta dd { margin: 0; word-break: break-word; }

.markdown-body h1, .markdown-body h2, .markdown-body h3, .markdown-body h4 {
  letter-spacing: -0.015em;
  margin-top: 1.75em;
  margin-bottom: 0.5em;
}
.markdown-body h2 { padding-bottom: 0.3em; border-bottom: 1px solid var(--border); }
.markdown-body p, .markdown-body ul, .markdown-body ol { margin: 0.6em 0; }
.markdown-body a { color: var(--accent); text-decoration: none; }
.markdown-body a:hover { text-decoration: underline; }

.markdown-body code {
  background: var(--code-bg);
  padding: 0.1em 0.35em;
  border-radius: 4px;
  font-family: var(--mono);
  font-size: 0.88em;
  border: 1px solid var(--border);
}
.markdown-body pre {
  background: var(--code-bg);
  padding: 1rem;
  border-radius: 8px;
  border: 1px solid var(--border);
  overflow-x: auto;
}
.markdown-body pre code { background: transparent; border: none; padding: 0; }

.markdown-body table {
  border-collapse: collapse;
  margin: 1em 0;
  font-size: 0.92em;
  width: 100%;
}
.markdown-body th, .markdown-body td {
  padding: 0.5rem 0.75rem;
  border: 1px solid var(--border);
  text-align: left;
  vertical-align: top;
}
.markdown-body th { background: var(--bg-soft); font-weight: 600; }
.markdown-body tr:nth-child(even) td { background: var(--bg-soft); }

.markdown-body blockquote {
  margin: 1em 0;
  padding: 0.5em 1em;
  border-left: 4px solid var(--accent);
  background: var(--accent-soft);
  color: var(--fg-dim);
}
.markdown-body hr { border: none; border-top: 1px solid var(--border); margin: 2rem 0; }

.wikilink {
  color: var(--accent);
  background: var(--accent-soft);
  padding: 0.05em 0.3em;
  border-radius: 4px;
  text-decoration: none !important;
  font-weight: 500;
}
.wikilink:hover { text-decoration: underline !important; }
.wikilink-broken {
  color: var(--broken);
  background: rgba(248, 81, 73, 0.1);
  padding: 0.05em 0.3em;
  border-radius: 4px;
  text-decoration: line-through;
  cursor: not-allowed;
}

@media (max-width: 800px) {
  body { grid-template-columns: 1fr; }
  .sidebar { position: relative; max-height: none; border-right: none; border-bottom: 1px solid var(--border); }
  .content { padding: 1.25rem; }
}