:root {
  --bg: #f6f5f1;
  --surface: #ffffff;
  --ink: #17181a;
  --ink-2: #4a4d52;
  --muted: #7a7d83;
  --line: #e3e1da;
  --accent: #1d5c4a;
  --accent-ink: #ffffff;
  --accent-soft: #e2eee9;
  --private: #8a4b12;
  --private-soft: #f6eadc;
  --code-bg: #f0eee8;
  --bad: #b3261e;
  --bad-soft: #fbe9e7;
  --bad-line: #efc5c0;
  --radius: 10px;
  --sans: 'IBM Plex Sans', system-ui, -apple-system, sans-serif;
  --mono: 'IBM Plex Mono', ui-monospace, SFMono-Regular, Menlo, monospace;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #111213; --surface: #18191b; --ink: #ecebe6; --ink-2: #b9b8b2; --muted: #85878b; --line: #2a2c2f;
    --accent: #6cc3a5; --accent-ink: #0d1f19; --accent-soft: #1b2e28; --private: #e0a46a; --private-soft: #2e2318; --code-bg: #1f2022; --bad: #f28b82; --bad-soft: #3a1d1b; --bad-line: #5a2a26;
  }
}
:root[data-theme="dark"] {
  --bg: #111213; --surface: #18191b; --ink: #ecebe6; --ink-2: #b9b8b2; --muted: #85878b; --line: #2a2c2f;
  --accent: #6cc3a5; --accent-ink: #0d1f19; --accent-soft: #1b2e28; --private: #e0a46a; --private-soft: #2e2318; --code-bg: #1f2022; --bad: #f28b82; --bad-soft: #3a1d1b; --bad-line: #5a2a26;
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body { margin: 0; background: var(--bg); color: var(--ink); font: 15px/1.55 var(--sans); min-height: 100vh; display: flex; flex-direction: column; }
a { color: inherit; }
code, pre, .mono { font-family: var(--mono); font-size: 0.88em; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }

.top { display: flex; align-items: center; gap: 28px; padding: 14px 32px; border-bottom: 1px solid var(--line); background: var(--surface); position: sticky; top: 0; z-index: 5; }
.brand { font-weight: 600; text-decoration: none; display: flex; align-items: center; gap: 9px; letter-spacing: -0.01em; }
.mark { width: 18px; height: 18px; border-radius: 5px; background: var(--accent); box-shadow: 5px 5px 0 -1px var(--accent-soft); }
.top nav { display: flex; gap: 20px; flex: 1; }
.top nav a { text-decoration: none; color: var(--ink-2); font-size: 14px; }
.top nav a:hover, .top nav a.on { color: var(--ink); }
.auth { margin-left: auto; }

button, .btn { font: 500 14px var(--sans); border-radius: 8px; border: 1px solid var(--line); background: var(--surface); color: var(--ink); padding: 7px 14px; cursor: pointer; text-decoration: none; display: inline-flex; align-items: center; gap: 6px; }
button:hover, .btn:hover { border-color: var(--ink-2); }
.primary { background: var(--accent); color: var(--accent-ink); border-color: var(--accent); }
.primary:hover { filter: brightness(1.08); border-color: var(--accent); }
.ghost { background: transparent; }

main { flex: 1; width: 100%; max-width: 1160px; margin: 0 auto; padding: 40px 32px 64px; }
main:focus { outline: none; }
.foot { display: flex; justify-content: space-between; gap: 16px; padding: 18px 32px; border-top: 1px solid var(--line); color: var(--muted); font-size: 13px; flex-wrap: wrap; }

.hero { display: grid; grid-template-columns: 1.3fr 1fr; gap: 48px; align-items: end; margin-bottom: 36px; }
.hero h1 { font-size: 40px; line-height: 1.1; letter-spacing: -0.025em; margin: 0 0 14px; font-weight: 600; }
.hero p { color: var(--ink-2); margin: 0; max-width: 560px; font-size: 16px; }
.stats { display: grid; grid-template-columns: repeat(3, 1fr); border: 1px solid var(--line); border-radius: var(--radius); background: var(--surface); }
.stats div { padding: 14px 16px; border-left: 1px solid var(--line); }
.stats div:first-child { border-left: 0; }
.stats b { display: block; font-size: 24px; font-weight: 600; letter-spacing: -0.02em; }
.stats span { color: var(--muted); font-size: 12px; text-transform: uppercase; letter-spacing: 0.06em; }

.searchbar { display: flex; gap: 10px; margin-bottom: 14px; }
.searchbar input { flex: 1; }
input, select, textarea { font: 15px var(--sans); color: var(--ink); background: var(--surface); border: 1px solid var(--line); border-radius: 8px; padding: 10px 12px; width: 100%; }
input:focus, select:focus { border-color: var(--accent); outline: none; }
.chips { display: flex; flex-wrap: wrap; gap: 6px; margin-bottom: 26px; }
.chip { font-size: 13px; padding: 4px 11px; border-radius: 999px; border: 1px solid var(--line); background: transparent; color: var(--ink-2); font-weight: 400; }
.chip.on { background: var(--ink); color: var(--bg); border-color: var(--ink); }

.grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(320px, 1fr)); gap: 14px; }
.card { display: flex; flex-direction: column; gap: 8px; padding: 18px; background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); text-decoration: none; transition: border-color .15s, transform .15s; min-height: 150px; }
.card:hover { border-color: var(--ink-2); transform: translateY(-1px); }
.card h3 { margin: 0; font-size: 16px; font-weight: 600; letter-spacing: -0.01em; }
.card p { margin: 0; color: var(--ink-2); font-size: 14px; flex: 1; }
.card .id { font-family: var(--mono); font-size: 12px; color: var(--muted); }
.meta { display: flex; gap: 8px; align-items: center; flex-wrap: wrap; font-size: 12px; color: var(--muted); }
.tag { font-size: 11.5px; padding: 2px 8px; border-radius: 5px; background: var(--code-bg); color: var(--ink-2); }
.badge { font-size: 11px; font-weight: 600; text-transform: uppercase; letter-spacing: 0.05em; padding: 2px 7px; border-radius: 5px; }
.badge.private { background: var(--private-soft); color: var(--private); }
.badge.public { background: var(--accent-soft); color: var(--accent); }
.section-title { display: flex; align-items: baseline; justify-content: space-between; margin: 34px 0 14px; }
.section-title h2 { margin: 0; font-size: 18px; letter-spacing: -0.01em; }
.muted { color: var(--muted); }
.empty { padding: 48px; text-align: center; color: var(--muted); border: 1px dashed var(--line); border-radius: var(--radius); }

.detail { display: grid; grid-template-columns: minmax(0, 1fr) 320px; gap: 36px; align-items: start; }
.crumbs { font-size: 13px; color: var(--muted); margin-bottom: 10px; }
.crumbs a { color: var(--muted); }
.detail h1 { font-size: 32px; letter-spacing: -0.02em; margin: 0 0 8px; }
.lede { color: var(--ink-2); font-size: 16px; margin: 0 0 16px; }
.panel { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 18px; margin-bottom: 14px; }
.panel h3 { font-size: 12px; text-transform: uppercase; letter-spacing: 0.07em; color: var(--muted); margin: 0 0 10px; font-weight: 600; }
.tabs { display: flex; gap: 4px; flex-wrap: wrap; margin-bottom: 10px; }
.tabs button { font-size: 12.5px; padding: 4px 10px; }
.tabs button.on { background: var(--ink); color: var(--bg); border-color: var(--ink); }
.cmd { display: flex; align-items: flex-start; gap: 8px; background: var(--code-bg); border-radius: 8px; padding: 10px 12px; }
.cmd code { flex: 1; white-space: pre-wrap; word-break: break-all; font-size: 12.5px; }
.cmd button { padding: 3px 9px; font-size: 12px; flex-shrink: 0; }
.files { list-style: none; padding: 0; margin: 0; font-family: var(--mono); font-size: 13px; }
.files li { padding: 4px 0; border-bottom: 1px solid var(--line); }
.files li:last-child { border: 0; }
.files a { text-decoration: none; }
.files a:hover { text-decoration: underline; }
dl.kv { display: grid; grid-template-columns: auto 1fr; gap: 6px 14px; margin: 0; font-size: 14px; }
dl.kv dt { color: var(--muted); }
dl.kv dd { margin: 0; }

.md { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 28px 34px; }
.md h1, .md h2, .md h3, .md h4 { letter-spacing: -0.01em; line-height: 1.25; margin: 1.6em 0 0.5em; }
.md h1 { font-size: 24px; } .md h2 { font-size: 19px; } .md h3 { font-size: 16px; }
.md > :first-child { margin-top: 0; }
.md p, .md li { color: var(--ink-2); }
.md pre { background: var(--code-bg); padding: 14px 16px; border-radius: 8px; overflow-x: auto; line-height: 1.5; }
.md :not(pre) > code { background: var(--code-bg); padding: 1px 5px; border-radius: 4px; }
.md table { border-collapse: collapse; width: 100%; font-size: 14px; display: block; overflow-x: auto; }
.md th, .md td { border: 1px solid var(--line); padding: 6px 10px; text-align: left; vertical-align: top; }
.md blockquote { margin: 0; padding-left: 14px; border-left: 3px solid var(--line); color: var(--muted); }
.md hr { border: 0; border-top: 1px solid var(--line); margin: 24px 0; }
.frontmatter { font-family: var(--mono); font-size: 12.5px; color: var(--muted); background: var(--code-bg); padding: 12px 14px; border-radius: 8px; margin-bottom: 22px; white-space: pre-wrap; }

.steps { counter-reset: s; display: grid; gap: 14px; }
.step { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 20px 22px; }
.step h3 { margin: 0 0 6px; font-size: 16px; }
.step p { margin: 0 0 12px; color: var(--ink-2); }
.page-head h1 { font-size: 32px; letter-spacing: -0.02em; margin: 0 0 8px; }
.page-head p { color: var(--ink-2); margin: 0 0 28px; max-width: 680px; }
.agents-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(330px, 1fr)); gap: 14px; }
table.list { width: 100%; border-collapse: collapse; font-size: 14px; background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; }
table.list th, table.list td { text-align: left; padding: 10px 14px; border-bottom: 1px solid var(--line); }
table.list th { font-size: 12px; text-transform: uppercase; letter-spacing: .06em; color: var(--muted); font-weight: 600; }
.row { display: flex; gap: 10px; align-items: center; flex-wrap: wrap; }
.row.end { justify-content: flex-end; }
.error { color: #c0392b; font-size: 14px; min-height: 1em; }
.notice { background: var(--accent-soft); border-radius: 8px; padding: 12px 14px; margin: 12px 0; font-size: 14px; }
.notice code { word-break: break-all; }

dialog { border: 1px solid var(--line); border-radius: 14px; padding: 24px; max-width: 460px; width: calc(100% - 32px); background: var(--surface); color: var(--ink); }
dialog::backdrop { background: rgb(0 0 0 / 0.35); }
dialog h2 { margin: 0 0 8px; font-size: 19px; }
dialog label { font-size: 13px; font-weight: 500; display: block; margin: 14px 0 6px; }

@media (max-width: 860px) {
  .top { padding: 12px 16px; gap: 14px; flex-wrap: wrap; }
  .top nav { order: 3; width: 100%; overflow-x: auto; gap: 16px; }
  main { padding: 24px 16px 48px; }
  .hero { grid-template-columns: 1fr; gap: 20px; }
  .hero h1 { font-size: 30px; }
  .detail { grid-template-columns: 1fr; }
  .md { padding: 20px 18px; }
  .grid, .agents-grid { grid-template-columns: 1fr; }
  .foot { padding: 16px; }
}

/* good vs bad gallery */
.lesson { border-top: 1px solid var(--line); padding: 30px 0 8px; }
.lesson-head { display: flex; align-items: baseline; gap: 12px; flex-wrap: wrap; }
.lesson-head h2 { margin: 0; font-size: 21px; letter-spacing: -0.015em; }
.lesson-n { font-family: var(--mono); color: var(--muted); font-size: 13px; }
.caught { font-size: 13px; margin-left: auto; }
.why { color: var(--ink-2); max-width: 760px; margin: 10px 0 16px; }
.fix { max-width: 760px; margin: 14px 0 0; }
.pair { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.side { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; min-width: 0; }
.bad-side { border-color: var(--bad-line); }
.side-head { padding: 10px 14px; border-bottom: 1px solid var(--line); font-size: 13px; display: flex; gap: 8px; align-items: baseline; flex-wrap: wrap; }
.side-head .mono { color: var(--muted); font-size: 12px; }
.side-head a { margin-left: auto; font-size: 12.5px; }
.verdict { padding: 8px 14px; font-size: 13px; font-weight: 500; }
.verdict.bad { background: var(--bad-soft); color: var(--bad); }
.verdict.warn { background: var(--private-soft); color: var(--private); }
.verdict.quiet { background: var(--code-bg); color: var(--ink-2); }
.verdict.ok { background: var(--accent-soft); color: var(--accent); }
.code-lines { font-family: var(--mono); font-size: 12px; line-height: 1.55; padding: 8px 0; max-height: 360px; overflow: auto; }
.code-lines > div { display: flex; gap: 12px; padding: 0 14px; white-space: pre-wrap; word-break: break-word; }
.code-lines .ln { color: var(--muted); min-width: 22px; text-align: right; flex-shrink: 0; user-select: none; }
.code-lines .hit { background: var(--bad-soft); box-shadow: inset 3px 0 0 var(--bad); }
.code-lines .more { padding: 0 14px; color: var(--muted); }
.findings { list-style: none; margin: 0; padding: 8px 14px 12px; border-top: 1px solid var(--line); font-size: 12.5px; display: grid; gap: 4px; }
.sev { font-family: var(--mono); font-size: 11px; text-transform: uppercase; margin-right: 6px; }
.sev.critical, .sev.error { color: var(--bad); }
.sev.warning { color: var(--private); }
.measured { margin-top: 14px; padding: 10px 14px; border-radius: 8px; background: var(--code-bg); font-size: 14px; }
@media (max-width: 860px) { .pair { grid-template-columns: 1fr; } .caught { margin-left: 0; width: 100%; } }