:root {
  color-scheme: light;
  --bg: #f7f8fa;
  --panel: #ffffff;
  --panel-2: #f2f7f6;
  --ink: #18202a;
  --muted: #667085;
  --line: #d9e1e6;
  --line-strong: #aebbc5;
  --teal: #0f766e;
  --teal-dark: #115e59;
  --aqua: #e7f4f2;
  --gold: #a16207;
  --gold-soft: #fff7df;
  --rose: #9f1239;
  --rose-soft: #fff1f3;
  --shadow: 0 12px 34px rgba(20, 28, 38, 0.08);
}

* { box-sizing: border-box; }

html, body { height: 100%; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Segoe UI", sans-serif;
  font-size: 14px;
  line-height: 1.6;
  display: flex;
  flex-direction: column;
}

svg { width: 16px; height: 16px; flex: none; }

kbd {
  font: 12px ui-monospace, SFMono-Regular, Menlo, monospace;
  border: 1px solid var(--line-strong);
  border-bottom-width: 2px;
  border-radius: 4px;
  padding: 0 4px;
  background: var(--panel);
}

.kb-header {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 12px 20px;
  background: var(--panel);
  border-bottom: 1px solid var(--line);
}

.kb-brand { display: flex; align-items: center; gap: 12px; min-width: 0; }
.kb-brand strong { display: block; font-size: 16px; }
.kb-brand span { display: block; color: var(--muted); font-size: 12px; }
.kb-back { display: grid; place-items: center; width: 32px; height: 32px; border-radius: 8px; color: var(--ink); border: 1px solid var(--line); }
.kb-back:hover { border-color: var(--teal); color: var(--teal); }

.kb-search {
  flex: 1;
  display: flex;
  align-items: center;
  gap: 8px;
  max-width: 560px;
  margin-left: auto;
  padding: 0 12px;
  height: 38px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--bg);
  color: var(--muted);
}
.kb-search:focus-within { border-color: var(--teal); background: var(--panel); }
.kb-search input { flex: 1; min-width: 0; border: 0; background: transparent; font: inherit; color: var(--ink); outline: none; }

.kb-button {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  height: 36px;
  padding: 0 14px;
  border: 1px solid var(--line);
  border-radius: 9px;
  background: var(--panel);
  color: var(--ink);
  font: inherit;
  cursor: pointer;
  white-space: nowrap;
}
.kb-button:hover { border-color: var(--teal); color: var(--teal); }
.kb-button b { min-width: 20px; padding: 0 6px; border-radius: 10px; background: var(--teal); color: #fff; font-size: 12px; text-align: center; }
.kb-button.primary { background: var(--teal); border-color: var(--teal); color: #fff; }
.kb-button.primary:hover { background: var(--teal-dark); color: #fff; }
.kb-button.ghost { background: transparent; }
.kb-icon { display: grid; place-items: center; width: 30px; height: 30px; border: 0; border-radius: 8px; background: transparent; cursor: pointer; color: var(--muted); }
.kb-icon:hover { background: var(--bg); color: var(--ink); }

.kb-layout {
  flex: 1;
  min-height: 0;
  display: grid;
  grid-template-columns: 240px minmax(320px, 1fr) minmax(360px, 1.1fr);
}

.kb-layout > * { min-width: 0; }
.kb-sidebar { overflow-y: auto; padding: 16px 12px; border-right: 1px solid var(--line); background: var(--panel); }
.kb-filter { display: grid; gap: 4px; margin: 0 4px 12px; }
.kb-filter label { color: var(--muted); font-size: 12px; }
.kb-filter select { height: 32px; border: 1px solid var(--line); border-radius: 8px; background: var(--panel); font: inherit; padding: 0 8px; }
.kb-collections { list-style: none; margin: 0; padding: 0; display: grid; gap: 2px; }
.kb-collections button {
  width: 100%;
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 7px 10px;
  border: 0;
  border-radius: 8px;
  background: transparent;
  font: inherit;
  color: var(--ink);
  text-align: left;
  cursor: pointer;
}
.kb-collections button span { flex: 1; }
.kb-collections button small { color: var(--muted); }
.kb-collections button:hover { background: var(--bg); }
.kb-collections button.active { background: var(--aqua); color: var(--teal-dark); font-weight: 600; }

.kb-main { overflow-y: auto; padding: 18px 20px; }
.kb-results-head { display: flex; align-items: baseline; gap: 10px; }
.kb-results-head h1 { margin: 0; font-size: 18px; }
.kb-results-head span { color: var(--muted); }
.kb-results-desc { margin: 4px 0 14px; color: var(--muted); }
.kb-results { display: grid; gap: 8px; }

.kb-card {
  min-width: 0;
  width: 100%;
  overflow-wrap: anywhere;
  display: grid;
  gap: 4px;
  padding: 12px 14px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--panel);
  text-align: left;
  font: inherit;
  color: inherit;
  cursor: pointer;
}
.kb-card:hover { border-color: var(--line-strong); box-shadow: var(--shadow); }
.kb-card.active { border-color: var(--teal); box-shadow: 0 0 0 1px var(--teal) inset; }
.kb-card-top { display: flex; align-items: center; gap: 8px; }
.kb-card-top strong { flex: 1; min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.kb-card p { margin: 0; color: var(--muted); display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.kb-id { font: 11px ui-monospace, SFMono-Regular, Menlo, monospace; color: var(--muted); }
.kb-tags { display: flex; flex-wrap: wrap; gap: 4px; }
.kb-tag { padding: 0 7px; border-radius: 10px; background: var(--bg); color: var(--muted); font-size: 12px; }

.kb-badge { padding: 0 7px; border-radius: 10px; font-size: 11px; white-space: nowrap; }
.kb-badge.verified, .kb-badge.reviewed { background: var(--aqua); color: var(--teal-dark); }
.kb-badge.draft { background: var(--bg); color: var(--muted); }
.kb-badge.needs-verification, .kb-badge.needs-legal-review { background: var(--gold-soft); color: var(--gold); }

.kb-detail { overflow-y: auto; padding: 20px 22px; border-left: 1px solid var(--line); background: var(--panel); }
.kb-empty { color: var(--muted); padding-top: 40px; text-align: center; line-height: 2; }
.kb-detail h2 { margin: 6px 0 2px; font-size: 20px; }
.kb-detail .kb-sub { color: var(--muted); margin: 0 0 12px; }
.kb-detail h3 { margin: 18px 0 6px; font-size: 13px; color: var(--muted); font-weight: 600; }
.kb-detail p { margin: 0 0 8px; }
.kb-actions { display: flex; gap: 8px; flex-wrap: wrap; margin: 12px 0 4px; }
.kb-prompt {
  position: relative;
  margin: 0 0 8px;
  padding: 12px 14px;
  border-radius: 10px;
  background: var(--panel-2);
  border: 1px solid var(--line);
  white-space: pre-wrap;
  word-break: break-word;
}
.kb-prompt .kb-lang { display: block; color: var(--muted); font-size: 11px; margin-bottom: 4px; }
.kb-slots { width: 100%; border-collapse: collapse; }
.kb-slots th, .kb-slots td { padding: 6px 8px; border-bottom: 1px solid var(--line); text-align: left; vertical-align: top; }
.kb-slots th { width: 110px; color: var(--muted); font-weight: 500; white-space: nowrap; }
.kb-note { color: var(--muted); font-size: 12px; }
.kb-list { margin: 0; padding-left: 18px; }
.kb-list li { margin-bottom: 2px; }
.kb-detail a { color: var(--teal); }
.kb-palette { display: grid; grid-template-columns: repeat(auto-fill, minmax(120px, 1fr)); gap: 8px; }
.kb-swatch { display: grid; gap: 2px; font-size: 12px; }
.kb-swatch span { height: 36px; border-radius: 8px; border: 1px solid var(--line); }
.kb-swatch small { color: var(--muted); }
.kb-prompt .kb-lang .kb-button { float: right; padding: 2px 8px; font-size: 11px; }
.kb-kv { display: grid; grid-template-columns: 110px 1fr; gap: 4px 10px; }
.kb-kv dt { color: var(--muted); }
.kb-kv dd { margin: 0; }

.kb-tray {
  position: fixed;
  right: 20px;
  bottom: 20px;
  width: min(560px, calc(100vw - 32px));
  max-height: calc(100vh - 100px);
  overflow-y: auto;
  padding: 14px 16px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: var(--panel);
  box-shadow: 0 20px 60px rgba(20, 28, 38, 0.18);
  z-index: 20;
}
.kb-tray-head { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
.kb-tray-head span { flex: 1; color: var(--muted); font-size: 12px; }
.kb-tray-items { list-style: none; margin: 10px 0; padding: 0; display: grid; gap: 4px; }
.kb-tray-items li { display: flex; align-items: center; gap: 8px; padding: 4px 8px; border-radius: 8px; background: var(--bg); }
.kb-tray-items li span { flex: 1; min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.kb-tray-options { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; margin-bottom: 8px; }
.kb-tray-options label { flex: 1; color: var(--muted); font-size: 12px; }
.kb-tray textarea { width: 100%; border: 1px solid var(--line); border-radius: 10px; padding: 10px; font: 13px/1.6 inherit; resize: vertical; background: var(--panel-2); }

.kb-toast {
  position: fixed;
  left: 50%;
  bottom: 28px;
  transform: translateX(-50%);
  padding: 8px 16px;
  border-radius: 10px;
  background: var(--ink);
  color: #fff;
  z-index: 30;
}

@media (max-width: 1100px) {
  .kb-layout { grid-template-columns: 200px 1fr; }
  .kb-detail { grid-column: 1 / -1; border-left: 0; border-top: 1px solid var(--line); }
  .kb-layout { overflow-y: auto; }
  .kb-main, .kb-detail { overflow: visible; }
}

@media (max-width: 720px) {
  .kb-header { flex-wrap: wrap; padding: 10px 16px; }
  .kb-search { order: 3; flex-basis: 100%; max-width: none; margin: 0; }
  #kb-tray-open { margin-left: auto; }
  .kb-layout { display: block; }
  .kb-sidebar { border-right: 0; border-bottom: 1px solid var(--line); }
  .kb-collections { grid-auto-flow: column; overflow-x: auto; }
  .kb-collections button { white-space: nowrap; }
  .kb-main, .kb-detail { padding: 16px; }
}

.kb-check { display: inline-block; font-size: 11px; line-height: 1.5; padding: 0 6px; border-radius: 999px; border: 1px solid var(--line-strong); color: var(--muted); vertical-align: 1px; }
.kb-check.found { border-color: var(--teal); color: var(--teal-dark); background: var(--aqua); }
.kb-check.replaced { border-color: var(--gold); color: var(--gold); background: var(--gold-soft); }
.kb-check.unchecked { border-style: dashed; }
.kb-claims li { margin-bottom: 6px; }
.kb-details { margin-top: 8px; }
.kb-details summary { cursor: pointer; color: var(--muted); }
h4 { margin: 14px 0 4px; font-size: 13px; }

/* Film-music collections */
.kb-actions-tight { margin: 4px 0 6px; }
.kb-cue th { width: 120px; }
.kb-callout { padding: 10px 14px; border-radius: 10px; border: 1px solid var(--gold); background: var(--gold-soft); color: var(--ink); }
.kb-facts li { color: var(--muted); }