:root {
  color-scheme: light dark;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.55;
  --bg: #f5f5f2;
  --surface: #ffffff;
  --surface-2: #ecece7;
  --text: #171715;
  --muted: #66665f;
  --line: #d6d6cf;
  --accent: #30302c;
  --max: 1180px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #151513;
    --surface: #1d1d1a;
    --surface-2: #282824;
    --text: #f2f2ec;
    --muted: #abab9f;
    --line: #3b3b35;
    --accent: #e8e8df;
  }
}

* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--text); }
a { color: inherit; }
.knowledge-main { width: min(calc(100% - 32px), var(--max)); margin: 0 auto; padding: 32px 0 72px; }
.back { display: inline-block; margin-bottom: 48px; color: var(--muted); text-decoration: none; }
.back:hover { color: var(--text); }
.knowledge-header { max-width: 820px; margin-bottom: 36px; }
.eyebrow { margin: 0 0 8px; color: var(--muted); font-size: .76rem; font-weight: 700; letter-spacing: .09em; text-transform: uppercase; }
h1 { margin: 0; font-size: clamp(2.4rem, 7vw, 5.6rem); line-height: .96; letter-spacing: -.055em; }
h2 { margin: 0; line-height: 1.1; }
.lead { max-width: 70ch; margin: 20px 0 0; color: var(--muted); font-size: 1.08rem; }
.browser-summary { display: flex; justify-content: space-between; gap: 20px; align-items: center; margin: 28px 0 16px; padding-top: 18px; border-top: 1px solid var(--line); color: var(--muted); }
.browser-summary p { margin: 0; }
.browser-summary a { color: var(--text); }
.browser-controls { display: grid; grid-template-columns: minmax(240px, 2fr) repeat(4, minmax(130px, 1fr)); gap: 10px; margin: 0 0 24px; }
.browser-controls label { display: grid; gap: 6px; color: var(--muted); font-size: .76rem; font-weight: 700; text-transform: uppercase; letter-spacing: .06em; }
.browser-controls input, .browser-controls select { width: 100%; min-height: 44px; border: 1px solid var(--line); border-radius: 0; background: var(--surface); color: var(--text); padding: 10px 12px; font: inherit; text-transform: none; letter-spacing: 0; }
.browser-controls input:focus-visible, .browser-controls select:focus-visible, a:focus-visible { outline: 3px solid currentColor; outline-offset: 3px; }
.knowledge-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 1px; margin: 0; padding: 1px; list-style: none; background: var(--line); }
.knowledge-card { background: var(--surface); }
.knowledge-card[hidden] { display: none; }
.knowledge-card > a { display: flex; min-height: 300px; height: 100%; flex-direction: column; padding: 22px; text-decoration: none; }
.knowledge-card > a:hover { background: var(--surface-2); }
.card-topline, .detail-meta, .chip-row, .queue-reasons { display: flex; flex-wrap: wrap; gap: 7px; align-items: center; }
.card-topline { justify-content: space-between; margin-bottom: 34px; }
.badge, .chip, .status { display: inline-flex; align-items: center; min-height: 26px; padding: 4px 8px; border: 1px solid var(--line); font-size: .72rem; line-height: 1; text-decoration: none; }
.status-verified { font-weight: 800; }
.status-researching, .status-draft { border-style: dashed; }
.knowledge-card h2 { font-size: 1.45rem; }
.ja-label, .detail-ja { margin: 5px 0 0; color: var(--muted); }
.definition-preview { margin: 20px 0 26px; color: var(--muted); }
.knowledge-card .chip-row { margin-top: auto; }
.detail-meta { margin: 0 0 14px; }
.detail-ja { font-size: 1.15rem; }
.definition-block { max-width: 900px; margin: 38px 0; padding: 28px 0; border-block: 1px solid var(--line); font-size: clamp(1.25rem, 2.5vw, 1.8rem); line-height: 1.45; }
.definition-block p { margin: 0; }
.detail-section { max-width: 900px; padding: 26px 0; border-bottom: 1px solid var(--line); }
.detail-section h2 { margin-bottom: 14px; font-size: .82rem; letter-spacing: .08em; text-transform: uppercase; color: var(--muted); }
.detail-section p { max-width: 72ch; }
.link-list, .source-list, .text-list, .queue-list { margin: 0; padding: 0; list-style: none; }
.link-list, .source-list { display: grid; gap: 8px; }
.link-list a, .source-list a, .source-list > li > div { display: grid; grid-template-columns: minmax(160px, 1fr) minmax(160px, 1fr) auto; gap: 14px; align-items: baseline; padding: 13px 14px; border: 1px solid var(--line); text-decoration: none; }
.link-list a:hover, .source-list a:hover { background: var(--surface-2); }
.link-list span, .source-list span, .link-list small, .source-list small { color: var(--muted); }
.text-list { display: grid; gap: 10px; }
.text-list li { padding-left: 18px; position: relative; }
.text-list li::before { content: "—"; position: absolute; left: 0; color: var(--muted); }
.queue-list { border-top: 1px solid var(--line); }
.queue-list > li { border-bottom: 1px solid var(--line); }
.queue-list > li > a { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; padding: 20px 0; text-decoration: none; }
.queue-list > li > a:hover h2 { text-decoration: underline; }
.queue-list p { margin: 4px 0 0; color: var(--muted); }
.queue-reasons { justify-content: flex-end; align-content: center; }
.missing-ref { color: var(--muted); }
.empty { color: var(--muted); }
footer { margin-top: 72px; padding-top: 20px; border-top: 1px solid var(--line); color: var(--muted); font-size: .8rem; }

@media (max-width: 900px) {
  .browser-controls { grid-template-columns: repeat(2, 1fr); }
  .search-field { grid-column: 1 / -1; }
  .knowledge-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 620px) {
  .knowledge-main { width: min(calc(100% - 22px), var(--max)); padding-top: 22px; }
  .back { margin-bottom: 32px; }
  .browser-summary { align-items: flex-start; flex-direction: column; }
  .browser-controls { grid-template-columns: 1fr; }
  .search-field { grid-column: auto; }
  .knowledge-grid { grid-template-columns: 1fr; }
  .knowledge-card > a { min-height: 0; }
  .link-list a, .source-list a, .source-list > li > div { grid-template-columns: 1fr; gap: 5px; }
  .queue-list > li > a { grid-template-columns: 1fr; }
  .queue-reasons { justify-content: flex-start; }
}