:root {
  --bg: #0f1117;
  --surface: #171a22;
  --surface2: #1e222d;
  --text: #e8eaef;
  --muted: #9aa3b5;
  --accent: #6c9eff;
  --accent2: #c8d82b;
  --border: #2a3142;
  --code-bg: #252b3a;
  --radius: 12px;
  --font: "Segoe UI", system-ui, -apple-system, sans-serif;
  --mono: "JetBrains Mono", "Fira Code", ui-monospace, monospace;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.55;
  min-height: 100vh;
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

.wrap { max-width: 1100px; margin: 0 auto; padding: 0 20px; }

.hero {
  background: linear-gradient(135deg, #141824 0%, #1a2030 50%, #12151c 100%);
  border-bottom: 1px solid var(--border);
  padding: 48px 0 36px;
}

.badge {
  display: inline-block;
  font-size: 12px;
  letter-spacing: .06em;
  text-transform: uppercase;
  color: var(--accent2);
  background: rgba(200, 216, 43, .12);
  padding: 4px 10px;
  border-radius: 999px;
  margin-bottom: 12px;
}

.hero h1 {
  font-size: clamp(2rem, 5vw, 2.75rem);
  font-weight: 700;
  letter-spacing: -.02em;
  margin-bottom: 8px;
}

.lead { color: var(--muted); font-size: 1.05rem; margin-bottom: 6px; }

.meta { color: var(--muted); font-size: .9rem; margin-bottom: 20px; }

.search-box input {
  width: 100%;
  max-width: 420px;
  padding: 12px 16px;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text);
  font-size: 1rem;
  outline: none;
}

.search-box input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(108, 158, 255, .2);
}

.hint {
  margin-top: 14px;
  font-size: .85rem;
  color: var(--muted);
}

.hint code {
  background: var(--code-bg);
  padding: 2px 6px;
  border-radius: 4px;
  font-family: var(--mono);
  font-size: .82rem;
}

.layout {
  display: grid;
  grid-template-columns: 240px 1fr;
  gap: 32px;
  padding: 32px 20px 64px;
  align-items: start;
}

.toc {
  position: sticky;
  top: 20px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px;
  max-height: calc(100vh - 40px);
  overflow-y: auto;
}

.toc-title {
  font-size: .75rem;
  text-transform: uppercase;
  letter-spacing: .08em;
  color: var(--muted);
  margin-bottom: 10px;
}

.toc ul { list-style: none; }

.toc li {
  display: flex;
  justify-content: space-between;
  gap: 8px;
  padding: 5px 0;
  border-bottom: 1px solid rgba(255,255,255,.04);
  font-size: .82rem;
}

.toc li:last-child { border-bottom: none; }

.toc a { color: var(--text); flex: 1; }
.toc a:hover { color: var(--accent); text-decoration: none; }

.toc .count {
  color: var(--muted);
  font-size: .75rem;
  flex-shrink: 0;
}

.chapter {
  margin-bottom: 40px;
  scroll-margin-top: 24px;
}

.chapter h2 {
  font-size: 1.35rem;
  margin-bottom: 16px;
  padding-bottom: 8px;
  border-bottom: 2px solid var(--accent2);
  color: #fff;
}

.cmd-list { list-style: none; }

.cmd-item {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 14px 16px;
  margin-bottom: 10px;
  transition: opacity .15s, transform .15s;
}

.cmd-item.hidden { display: none; }

.cmd-main {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 4px;
}

.primary {
  font-family: var(--mono);
  font-size: .95rem;
  background: var(--code-bg);
  color: #fff;
  padding: 4px 10px;
  border-radius: 6px;
  border: 1px solid var(--border);
}

.rank {
  font-size: .72rem;
  color: var(--accent2);
  background: rgba(200, 216, 43, .1);
  padding: 2px 8px;
  border-radius: 999px;
}

.syns {
  font-size: .86rem;
  color: var(--muted);
  line-height: 1.45;
  word-break: break-word;
}

.desc {
  font-size: .9rem;
  color: var(--text);
  line-height: 1.45;
  margin: 6px 0 4px;
  opacity: .92;
}

.chapter.hidden { display: none; }

.no-results {
  display: none;
  text-align: center;
  color: var(--muted);
  padding: 40px;
}

.no-results.show { display: block; }

.page-foot {
  margin-top: 48px;
  padding-top: 24px;
  border-top: 1px solid var(--border);
  color: var(--muted);
  font-size: .85rem;
}

@media (max-width: 860px) {
  .layout {
    grid-template-columns: 1fr;
  }
  .toc {
    position: static;
    max-height: none;
  }
}