:root {
  --bg: #f7f8fa;
  --surface: #ffffff;
  --text: #1b1f24;
  --muted: #57606a;
  --border: #d0d7de;
  --accent: #0b5cad;
  --accent-text: #ffffff;
  --code-bg: #1d2633;
  --code-text: #e6edf3;
  --ph-bg: #fff2b3;
  --ph-text: #4d3800;
  --read-bg: #dafbe1;
  --read-text: #0f5323;
  --modify-bg: #fff1c2;
  --modify-text: #6b4a00;
  --destructive-bg: #ffe0de;
  --destructive-text: #8a1c14;
  --root-bg: #ece2ff;
  --root-text: #4b2a8f;
  --warn-border: #c9302c;
  --focus: #ff9800;
  --radius: 8px;
  --mono: ui-monospace, SFMono-Regular, Menlo, Consolas, "Liberation Mono", monospace;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0f141a;
    --surface: #161c24;
    --text: #e6edf3;
    --muted: #a3afbd;
    --border: #344050;
    --accent: #6cb6ff;
    --accent-text: #0f141a;
    --code-bg: #0a0e13;
    --code-text: #e6edf3;
    --ph-bg: #5c4a00;
    --ph-text: #ffec99;
    --read-bg: #12391f;
    --read-text: #9ff0b5;
    --modify-bg: #4a3600;
    --modify-text: #ffe08a;
    --destructive-bg: #5a1612;
    --destructive-text: #ffc1bc;
    --root-bg: #34205f;
    --root-text: #dcc9ff;
    --warn-border: #ff7b72;
  }
}

* { box-sizing: border-box; }

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

body {
  margin: 0;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, Ubuntu, sans-serif;
  font-size: 1rem;
  line-height: 1.55;
  background: var(--bg);
  color: var(--text);
}

a { color: var(--accent); }
a:hover { text-decoration-thickness: 2px; }

:focus-visible {
  outline: 3px solid var(--focus);
  outline-offset: 2px;
}

code, kbd, pre { font-family: var(--mono); }
code { font-size: 0.92em; overflow-wrap: anywhere; }
kbd {
  border: 1px solid var(--border);
  border-bottom-width: 2px;
  border-radius: 4px;
  padding: 0 0.3em;
  font-size: 0.85em;
}

.visually-hidden {
  position: absolute !important;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0 0 0 0);
  white-space: nowrap; border: 0;
}

.skip-link {
  position: absolute;
  left: 0.5rem; top: -3rem;
  background: var(--accent);
  color: var(--accent-text);
  padding: 0.5rem 1rem;
  border-radius: var(--radius);
  z-index: 10;
}
.skip-link:focus { top: 0.5rem; }

/* ---------------------------------------------------------- header */

.site-header {
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 5;
}
.header-inner {
  max-width: 64rem;
  margin: 0 auto;
  padding: 0.6rem 1rem;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem 1.25rem;
}
.brand {
  font-weight: 700;
  font-size: 1.1rem;
  color: var(--text);
  text-decoration: none;
}
.brand-prompt { font-family: var(--mono); color: var(--accent); }
.nav-list {
  display: flex;
  gap: 1rem;
  list-style: none;
  margin: 0; padding: 0;
}
.nav-list a { text-decoration: none; font-weight: 500; }
.nav-list a[aria-current="page"] { text-decoration: underline; text-underline-offset: 4px; }

.search-form {
  flex: 1 1 100%;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  align-items: center;
}
#search {
  flex: 1 1 18rem;
  min-width: 0;
  font-size: 1.05rem;
  padding: 0.55rem 0.75rem;
  border: 2px solid var(--border);
  border-radius: var(--radius);
  background: var(--bg);
  color: var(--text);
}
#search:focus { border-color: var(--accent); }
#category {
  flex: 0 1 auto;
  max-width: 100%;
  padding: 0.5rem;
  font-size: 0.95rem;
  border: 2px solid var(--border);
  border-radius: var(--radius);
  background: var(--bg);
  color: var(--text);
}
.search-hint { color: var(--muted); font-size: 0.85rem; }

/* ---------------------------------------------------------- main */

main {
  max-width: 64rem;
  margin: 0 auto;
  padding: 1rem 1rem 3rem;
}
main:focus { outline: none; }
h1 { font-size: 1.75rem; line-height: 1.25; margin: 0.5rem 0 0.5rem; }
h1:focus { outline: none; }
h2 { font-size: 1.3rem; margin: 2rem 0 0.75rem; }
h3 { font-size: 1.1rem; margin: 0 0 0.4rem; }
.lead { font-size: 1.1rem; color: var(--muted); margin-top: 0; }
.muted { color: var(--muted); }
.loading, .notice {
  padding: 1rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1rem;
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(17rem, 1fr));
  gap: 0.75rem;
  list-style: none;
  padding: 0;
  margin: 0;
}

.chip-list {
  list-style: none;
  padding: 0;
  margin: 0.25rem 0 1.25rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
}
.chip-list a, .chip-list span {
  display: inline-block;
  padding: 0.15rem 0.6rem;
  border: 1px solid var(--border);
  border-radius: 999px;
  font-family: var(--mono);
  font-size: 0.9rem;
  text-decoration: none;
  background: var(--surface);
}
.chip-list a:hover { border-color: var(--accent); }

/* ---------------------------------------------------------- results */

.results { list-style: none; padding: 0; margin: 0; display: grid; gap: 0.6rem; }
.result a.result-link {
  display: block;
  text-decoration: none;
  color: inherit;
}
.result a.result-link:hover .result-title,
.result a.result-link:focus-visible .result-title { text-decoration: underline; }
.result-title { color: var(--accent); font-weight: 700; font-size: 1.05rem; }
.result-title code { font-size: 1em; }
.result-kind {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--muted);
  margin-left: 0.5rem;
}
.result p { margin: 0.2rem 0 0; }

.empty-state h2 { margin-top: 0.5rem; }

/* ---------------------------------------------------------- badges */

.badges { display: inline-flex; flex-wrap: wrap; gap: 0.35rem; vertical-align: middle; }
.badge {
  display: inline-block;
  font-size: 0.78rem;
  font-weight: 600;
  padding: 0.1rem 0.5rem;
  border-radius: 4px;
  border: 1px solid transparent;
  white-space: nowrap;
}
.badge-read { background: var(--read-bg); color: var(--read-text); }
.badge-modify { background: var(--modify-bg); color: var(--modify-text); }
.badge-destructive { background: var(--destructive-bg); color: var(--destructive-text); }
.badge-root { background: var(--root-bg); color: var(--root-text); }
.badge-neutral { border-color: var(--border); color: var(--muted); }

/* ---------------------------------------------------------- command page */

.meta-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(18rem, 1fr));
  gap: 0.75rem;
  margin-top: 1rem;
}
.meta-grid h2 { margin: 0 0 0.5rem; font-size: 1.05rem; }
.meta-grid ul { margin: 0; padding-left: 1.2rem; }

table { border-collapse: collapse; width: 100%; font-size: 0.95rem; }
th, td { text-align: left; padding: 0.35rem 0.5rem; border-bottom: 1px solid var(--border); vertical-align: top; }
th { font-weight: 600; }
.table-wrap { overflow-x: auto; }

.examples { list-style: none; padding: 0; margin: 0; display: grid; gap: 1rem; }
.example h3, .steps h3 { display: flex; flex-wrap: wrap; align-items: center; gap: 0.5rem; }

.warning {
  border-left: 4px solid var(--warn-border);
  background: var(--destructive-bg);
  color: var(--destructive-text);
  padding: 0.5rem 0.75rem;
  border-radius: 0 var(--radius) var(--radius) 0;
  margin: 0.5rem 0;
}
.warning strong { margin-right: 0.25rem; }

.cmd-row {
  display: flex;
  align-items: stretch;
  gap: 0.5rem;
  margin: 0.5rem 0;
}
pre.cmd {
  flex: 1 1 auto;
  min-width: 0;
  margin: 0;
  padding: 0.6rem 0.8rem;
  background: var(--code-bg);
  color: var(--code-text);
  border-radius: var(--radius);
  overflow-x: auto;
  white-space: pre-wrap;
  word-break: break-word;
  font-size: 0.95rem;
}
pre.cmd::before { content: "$ "; color: #7ee2a8; user-select: none; }
.ph {
  background: var(--ph-bg);
  color: var(--ph-text);
  border-radius: 3px;
  padding: 0 0.15em;
  font-style: italic;
}

button {
  font: inherit;
  cursor: pointer;
  border-radius: var(--radius);
  border: 2px solid var(--accent);
  background: var(--accent);
  color: var(--accent-text);
  padding: 0.35rem 0.8rem;
  font-weight: 600;
  min-height: 2.5rem;
}
button.secondary { background: transparent; color: var(--accent); }
button:disabled { opacity: 0.5; cursor: not-allowed; }
.copy-btn { flex: 0 0 auto; align-self: flex-start; }

.ack-panel {
  border: 2px solid var(--warn-border);
  border-radius: var(--radius);
  padding: 0.75rem;
  margin: 0.5rem 0;
  background: var(--surface);
}
.ack-panel label { display: flex; gap: 0.5rem; align-items: flex-start; margin: 0.5rem 0; }
.ack-panel input[type="checkbox"] { width: 1.2rem; height: 1.2rem; margin-top: 0.2rem; flex: 0 0 auto; }
.ack-actions { display: flex; flex-wrap: wrap; gap: 0.5rem; }

.ph-note { font-size: 0.9rem; color: var(--muted); margin: 0.25rem 0; }
.copy-status { font-size: 0.9rem; font-weight: 600; min-height: 1.2em; margin: 0.2rem 0; }

details.options { margin: 0.5rem 0; }
details.options summary { cursor: pointer; font-weight: 600; }

.output-note { margin: 0.5rem 0 0; }
.output-note strong { margin-right: 0.25rem; }

/* ---------------------------------------------------------- tasks */

.steps { padding-left: 1.5rem; display: grid; gap: 1rem; }
.steps > li::marker { font-weight: 700; }
.errors { margin: 0.4rem 0 0; padding-left: 1.2rem; }

.legend { display: grid; gap: 0.4rem; margin: 0; }
.legend div { display: flex; gap: 0.5rem; align-items: baseline; flex-wrap: wrap; }
.legend dt { flex: 0 0 auto; }
.legend dd { margin: 0; }

.site-footer {
  border-top: 1px solid var(--border);
  color: var(--muted);
  font-size: 0.9rem;
  padding: 1rem;
  text-align: center;
}

@media (max-width: 40rem) {
  h1 { font-size: 1.45rem; }
  .search-hint { display: none; }
  .site-header { position: static; }
  .cmd-row { flex-direction: column; }
  .copy-btn { align-self: stretch; }
  .nav-list { gap: 0.75rem; }
}

@media (prefers-reduced-motion: reduce) {
  * { scroll-behavior: auto !important; transition: none !important; }
}