:root {
  color-scheme: light dark;
  --bg: #ffffff;
  --fg: #14181f;
  --muted: #5b6472;
  --border: #d7dce3;
  --accent: #0b5fff;
  --code-bg: #f3f5f8;
  --warn-bg: #fff6e5;
  --warn-border: #e8b93a;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #12151b;
    --fg: #e9edf3;
    --muted: #9aa4b2;
    --border: #2a303c;
    --accent: #6ea8ff;
    --code-bg: #1b1f27;
    --warn-bg: #2b2411;
    --warn-border: #8a6d1c;
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  background: var(--bg);
  color: var(--fg);
  line-height: 1.45;
}

a { color: var(--accent); }

header {
  padding: 0.75rem 1.25rem;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: baseline;
  gap: 1rem;
  flex-wrap: wrap;
}
header h1 { font-size: 1.15rem; margin: 0; }
header .sub { color: var(--muted); font-size: 0.85rem; }
header nav { margin-left: auto; display: flex; gap: 1rem; }
header nav button {
  background: none; border: none; color: var(--fg); font: inherit; cursor: pointer;
  padding: 0.25rem 0.1rem; border-bottom: 2px solid transparent;
}
header nav button[aria-current="page"] { border-bottom-color: var(--accent); color: var(--accent); }

.layout {
  display: grid;
  grid-template-columns: minmax(220px, 280px) 1fr;
  min-height: calc(100vh - 3.2rem);
}
@media (max-width: 720px) {
  .layout { grid-template-columns: 1fr; }
}

nav#catalog {
  border-right: 1px solid var(--border);
  overflow-y: auto;
  padding: 0.5rem 0;
}
nav#catalog h2 {
  font-size: 0.7rem; text-transform: uppercase; letter-spacing: 0.04em;
  color: var(--muted); margin: 0.9rem 1rem 0.25rem;
}
.ns-group { border-bottom: 1px solid var(--border); }
.ns-button {
  width: 100%; text-align: left; background: none; border: none; color: var(--fg);
  font: inherit; font-weight: 600; padding: 0.5rem 1rem; cursor: pointer; display: flex;
  gap: 0.4rem; align-items: baseline;
}
.ns-button:hover, .ns-button:focus-visible { background: var(--code-bg); }
.ns-button .count { color: var(--muted); font-weight: 400; font-size: 0.8rem; }
.ns-comment { color: var(--muted); font-size: 0.78rem; margin: -0.15rem 1rem 0.4rem; }
ul.tables { list-style: none; margin: 0 0 0.4rem; padding: 0; }
ul.tables li button {
  width: 100%; text-align: left; background: none; border: none; color: var(--fg);
  font: inherit; font-size: 0.9rem; padding: 0.3rem 1rem 0.3rem 1.75rem; cursor: pointer;
}
ul.tables li button:hover, ul.tables li button:focus-visible { background: var(--code-bg); }
ul.tables li button[aria-current="true"] { color: var(--accent); font-weight: 600; }

main {
  padding: 1.25rem 1.5rem 3rem;
  overflow-y: auto;
  max-width: 980px;
}

.tabs { display: flex; gap: 0.25rem; border-bottom: 1px solid var(--border); margin: 1rem 0; flex-wrap: wrap; }
.tabs button {
  background: none; border: none; color: var(--muted); font: inherit; cursor: pointer;
  padding: 0.4rem 0.75rem; border-bottom: 2px solid transparent;
}
.tabs button[aria-selected="true"] { color: var(--fg); border-bottom-color: var(--accent); font-weight: 600; }
.tabs button:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }

table.cols { border-collapse: collapse; width: 100%; font-size: 0.88rem; }
table.cols th, table.cols td {
  border-bottom: 1px solid var(--border); text-align: left; padding: 0.4rem 0.6rem; vertical-align: top;
}
table.cols th { color: var(--muted); font-weight: 600; font-size: 0.78rem; text-transform: uppercase; }
table.cols code { font-size: 0.85em; }
.badge {
  display: inline-block; font-size: 0.72rem; border: 1px solid var(--border); border-radius: 3px;
  padding: 0 0.35rem; margin-right: 0.25rem; color: var(--muted);
}
.badge.key { color: var(--accent); border-color: var(--accent); }

pre.sql {
  background: var(--code-bg); border: 1px solid var(--border); border-radius: 6px;
  padding: 0.75rem 1rem; overflow-x: auto; font-size: 0.85rem; position: relative;
}
.copy-wrap { position: relative; }
.copy-btn {
  position: absolute; top: 0.5rem; right: 0.5rem; font: inherit; font-size: 0.78rem;
  border: 1px solid var(--border); background: var(--bg); color: var(--fg); border-radius: 4px;
  padding: 0.2rem 0.5rem; cursor: pointer;
}
.copy-btn:hover, .copy-btn:focus-visible { border-color: var(--accent); color: var(--accent); }

.card {
  border: 1px solid var(--border); border-radius: 8px; padding: 1rem; margin-bottom: 1rem;
}
.warn {
  background: var(--warn-bg); border: 1px solid var(--warn-border); border-radius: 6px;
  padding: 0.75rem 1rem; font-size: 0.9rem; margin: 1rem 0;
}

.recipe { margin-bottom: 2rem; }
.recipe h3 { margin-bottom: 0.2rem; }
.recipe .result { color: var(--muted); font-size: 0.85rem; margin-top: 0.3rem; }

.snap-table { font-size: 0.82rem; width: 100%; border-collapse: collapse; }
.snap-table th, .snap-table td { padding: 0.3rem 0.5rem; border-bottom: 1px solid var(--border); text-align: left; }
.snap-table td.num { text-align: right; font-variant-numeric: tabular-nums; }
.snap-table tr.current { font-weight: 600; }

button:focus-visible, a:focus-visible, [tabindex]:focus-visible {
  outline: 2px solid var(--accent); outline-offset: 2px;
}

.muted { color: var(--muted); }
.status { padding: 1rem 0; color: var(--muted); }
label.toggle { display: flex; align-items: center; gap: 0.4rem; font-size: 0.85rem; margin: 0.75rem 0; }
textarea#sql-box {
  width: 100%; min-height: 6rem; font-family: ui-monospace, SFMono-Regular, monospace; font-size: 0.85rem;
  padding: 0.6rem; border: 1px solid var(--border); border-radius: 6px; background: var(--code-bg); color: var(--fg);
}