:root {
  --bg: #f4f5f7;
  --panel: #ffffff;
  --line: #d8dce3;
  --fg: #21252e;
  --dim: #69707d;
  --accent: #2563eb;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  height: 100vh;
  display: flex;
  flex-direction: column;
  background: var(--bg);
  color: var(--fg);
  font: 13px/1.45 system-ui, -apple-system, "Segoe UI", sans-serif;
}
button, select, input {
  background: #ffffff;
  color: var(--fg);
  border: 1px solid var(--line);
  border-radius: 4px;
  padding: 3px 7px;
  font: inherit;
}
button { cursor: pointer; }
button:hover { border-color: var(--accent); }
.hidden { display: none !important; }
.dim { color: var(--dim); }
.count { color: var(--dim); white-space: nowrap; }

#topbar {
  border-bottom: 1px solid var(--line);
  background: var(--panel);
  padding: 6px 10px;
  flex: none;
}
#topbar .row { display: flex; gap: 6px; align-items: center; flex-wrap: wrap; }
#q { min-width: 240px; flex: 1 1 240px; }
.mini { display: flex; align-items: center; gap: 3px; color: var(--dim); font-size: 11px; }
.score-sel { padding: 2px 4px; }

#drawer {
  max-height: 40vh;
  overflow-y: auto;
  margin-top: 6px;
  border: 1px solid var(--line);
  border-radius: 4px;
}
.hit {
  display: flex;
  gap: 8px;
  align-items: center;
  padding: 4px 8px;
  cursor: pointer;
  border-bottom: 1px solid var(--line);
}
.hit:hover { background: #edf0f4; }
.hit.active { background: #dce7fa; }
.hit .name { flex: 1; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }

main { flex: 1; display: flex; min-height: 0; }
section {
  flex: 1 1 50%;
  min-width: 0;
  display: flex;
  flex-direction: column;
  border-right: 1px solid var(--line);
}
#right { border-right: none; }
.panel-head {
  flex: none;
  background: var(--panel);
  border-bottom: 1px solid var(--line);
  padding: 6px 10px;
}
.head-main { display: flex; gap: 8px; align-items: center; }
.title { font-weight: 600; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.linkish { background: none; border: none; color: var(--accent); padding: 0; margin-left: auto; }
.panel-body { flex: 1; overflow: auto; min-height: 0; }
.panel-foot {
  flex: none;
  display: flex;
  gap: 8px;
  align-items: center;
  justify-content: center;
  padding: 5px;
  border-top: 1px solid var(--line);
  background: var(--panel);
}

#metaTable {
  margin: 8px 0 0;
  display: grid;
  grid-template-columns: max-content 1fr;
  gap: 2px 10px;
  font-size: 12px;
  max-height: 40vh;
  overflow: auto;
}
#metaTable dt { color: var(--dim); }
#metaTable dd { margin: 0; word-break: break-all; }
#metaTable a { color: var(--accent); }

#pdfArea { display: flex; justify-content: center; padding: 10px; background: #e4e7ec; }
#pdfCanvas { max-width: 100%; height: auto; background: #fff; }
.placeholder { color: var(--dim); margin: auto; text-align: center; padding: 40px; }

.chips { display: flex; gap: 4px; margin-left: auto; }
.chip {
  border-radius: 4px;
  padding: 1px 6px;
  font-size: 11px;
  font-weight: 700;
  cursor: pointer;
  border: 1px solid transparent;
  color: #1a1e26;
}
.chip.sel { border-color: #1a1e26; }
.chip .alt {
  font-size: 8px;
  font-weight: 600;
  opacity: 0.65;
  margin-left: 2px;
  vertical-align: sub;
}
#scoreVersion { max-width: 190px; }
#versionNote { margin-left: 2px; }
.s-none { background: #d3d8e0; color: var(--dim); }
.s0 { background: #d9534f; color: #fff; }
.s1 { background: #e2925c; }
.s2 { background: #e0c355; }
.s3 { background: #a3cc66; }
.s4 { background: #5fc588; }
.s5 { background: #52cabb; }

#reasoning {
  margin-top: 8px;
  padding: 8px;
  border: 1px solid var(--line);
  border-radius: 4px;
  max-height: 35vh;
  overflow: auto;
  white-space: pre-wrap;
  font-size: 12px;
  color: var(--fg);
}

.page {
  padding: 6px 14px 18px;
  white-space: pre-wrap;
  word-wrap: break-word;
  font: 12.5px/1.55 ui-monospace, SFMono-Regular, Menlo, monospace;
}
.page-divider {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--dim);
  font-size: 11px;
  padding: 0 14px;
  user-select: none;
}
.page-divider::before, .page-divider::after {
  content: "";
  flex: 1;
  border-top: 1px solid var(--line);
}
.page-divider.current { color: var(--accent); }

.page-empty { color: var(--dim); font-style: italic; }