:root { --bg:#f4f4fb; --card:#fff; --ink:#1a1b4b; --muted:#5d5f8f; --accent:#2d2e83; --accent2:#f9b233;
        --accent2-ink:#2d2e83; --line:#dcdcef; --link:#2d2e83; --head-bg:#2d2e83; --head-ink:#fff; }
@media (prefers-color-scheme: dark) {
  :root { --bg:#12123a; --card:#1c1d4f; --ink:#ececfa; --muted:#a7a8d6; --accent:#f9b233; --accent2:#f9b233;
          --accent2-ink:#12123a; --line:#34357a; --link:#ffc95e; --head-bg:#2d2e83; --head-ink:#fff; }
}
* { box-sizing: border-box; }
body { margin:0; font:16px/1.5 system-ui, sans-serif; background:var(--bg); color:var(--ink); }
.layout { display:grid; grid-template-columns:300px 1fr; gap:20px; max-width:1200px; margin:20px auto; padding:0 16px; }
.filters { background:var(--card); border:1px solid var(--line); border-radius:8px; padding:14px; align-self:start; position:sticky; top:12px; max-height:calc(100vh - 24px); overflow:auto; }
.filters label { display:block; font-size:.85rem; color:var(--muted); margin-bottom:10px; }
.filters input[type=search], .filters input[type=text], .filters input[type=number], .filters select { width:100%; padding:7px; border:1px solid var(--line); border-radius:6px; background:var(--bg); color:var(--ink); font:inherit; }
.filters fieldset { border:1px solid var(--line); border-radius:6px; margin:0 0 10px; padding:8px; }
.filters input:focus, .filters select:focus { outline:2px solid var(--accent2); }
.filters fieldset input[type=number] { width:45%; }
legend { font-size:.85rem; color:var(--muted); padding:0 4px; }
.chk { display:block; color:var(--ink) !important; margin:2px 0 !important; }
.chk span { color:var(--muted); }
button { background:var(--accent2); color:var(--accent2-ink); border:0; border-radius:6px; padding:8px 14px; font:inherit; font-weight:600; cursor:pointer; }
.clear { margin-left:10px; color:var(--link); }
.pub { background:var(--card); border:1px solid var(--line); border-radius:8px; padding:12px 16px; margin-bottom:12px; }
.pub h2 { font-size:1.05rem; margin:0 0 4px; }
.pub a { color:var(--link); text-decoration:none; }
.authors { margin:2px 0; font-size:.92rem; }
.meta { margin:2px 0; color:var(--muted); font-size:.88rem; }
.badge { background:var(--accent2); color:var(--accent2-ink); border:1px solid var(--accent2); border-radius:10px; padding:0 8px; margin-right:4px; font-size:.78rem; }
details { margin-top:6px; font-size:.9rem; }
summary { cursor:pointer; color:var(--link); }
.pager { display:flex; gap:16px; justify-content:center; padding:16px 0; }
.pager a { color:var(--link); }
@media (max-width:800px) { .layout { grid-template-columns:1fr; } .filters { position:static; max-height:none; } }
.abbr { color:var(--link); margin-right:2px; }
.filters select[multiple] { height:auto; }

header { background:var(--head-bg); color:var(--head-ink); border-bottom:3px solid var(--accent2); padding:6px 16px; }
.banner, .years { max-width:1200px; margin:0 auto; }
.banner { display:flex; align-items:center; gap:14px; flex-wrap:wrap; }
.brand { background:#fff; border-radius:6px; padding:3px 8px; line-height:0; flex:none; }
.brand img { height:34px; width:auto; display:block; }
.banner h1 { margin:0; font-size:1.15rem; white-space:nowrap; }
.stats { margin:0 0 0 auto; display:flex; gap:6px 18px; flex-wrap:wrap; font-size:.88rem; opacity:.95; }
.stats b { color:var(--accent2); font-size:1rem; }
.years { display:flex; flex-wrap:nowrap; overflow-x:auto; align-items:center; gap:5px; margin-top:4px; font-size:.78rem; white-space:nowrap; }
.years span { color:#fff; opacity:.9; margin-right:4px; font-weight:600; }
.years a { background:var(--accent2); color:#2d2e83; font-weight:600; text-decoration:none; border-radius:10px; padding:0 9px; }
.years a:visited { color:#2d2e83; }
.years a:hover, .years a:focus { background:#fff; color:#2d2e83; }
@media (max-width:700px) { .stats { margin-left:0; } }

/* tabs, research-area tags */
.tabs { display:flex; gap:6px; }
.tabs a { color:#fff; text-decoration:none; font-weight:600; font-size:.9rem; padding:3px 12px; border-radius:12px; border:1px solid transparent; }
.tabs a:hover { border-color:var(--accent2); }
.tabs a.on { background:var(--accent2); color:#2d2e83; }
.tags { margin:4px 0 0; display:flex; flex-wrap:wrap; gap:4px; }
.tag { font-size:.75rem; border:1px solid var(--line); border-radius:10px; padding:0 8px; color:var(--link) !important; background:var(--bg); }
.tag:hover { border-color:var(--accent2); }
.filters .areas details { margin:0 0 4px 18px; font-size:.82rem; }
.filters .areas .sub { margin-left:4px !important; font-size:.82rem; }
.area-top { font-weight:600; }

/* statistics tab */
.stats-page { max-width:1200px; margin:20px auto; padding:0 16px; }
.tiles { display:grid; grid-template-columns:repeat(auto-fit,minmax(130px,1fr)); gap:10px; margin-bottom:16px; }
.tiles div { background:var(--card); border:1px solid var(--line); border-radius:8px; padding:10px 12px; font-size:.82rem; color:var(--muted); }
.tiles b { display:block; font-size:1.5rem; color:var(--ink); }
.grid { display:grid; grid-template-columns:repeat(2,minmax(0,1fr)); gap:14px; }
.card { background:var(--card); border:1px solid var(--line); border-radius:8px; padding:12px 16px; min-width:0; }
.card.wide { grid-column:1 / -1; }
.card h2 { font-size:1rem; margin:0 0 4px; }
.note, .muted { color:var(--muted); font-size:.82rem; margin:0 0 6px; }
.chart { position:relative; height:300px; }
.chart.tall { height:380px; }
.chart.xtall { height:620px; }
.scroll { overflow-x:auto; }
.heat { border-collapse:collapse; font-size:.8rem; width:100%; }
.heat th, .heat td { border:1px solid var(--line); padding:3px 6px; text-align:center; }
.heat tbody th { text-align:left; white-space:nowrap; font-weight:500; }
.heat thead th { font-weight:600; vertical-align:bottom; }
.heat td a { color:var(--ink); text-decoration:none; font-weight:600; display:block; }
.plain { margin:0; padding-left:20px; font-size:.9rem; }
.plain li { margin:3px 0; }
.plain b { float:right; margin-left:10px; }
.plain a { color:var(--link); }
@media (max-width:800px) { .grid { grid-template-columns:1fr; } .chart.xtall { height:520px; } }

/* v2: readable tabs, aligned tiles, jump menu */
header .tabs a, header .tabs a:visited { color:#fff; background:rgba(255,255,255,.14); border:1px solid rgba(255,255,255,.55); }
header .tabs a:hover, header .tabs a:focus { background:#fff; color:#2d2e83; }
header .tabs a.on, header .tabs a.on:visited { background:var(--accent2); color:#2d2e83; border-color:var(--accent2); }
.tabs { margin-left:8px; }
.tiles div { display:flex; flex-direction:column; align-items:center; justify-content:center; text-align:center; gap:2px; min-height:78px; }
.tiles b { display:block; line-height:1.1; }
.tiles span { line-height:1.2; }
.jump { display:flex; flex-wrap:wrap; gap:6px; align-items:center; margin:0 0 14px; font-size:.82rem; }
.jump span { color:var(--muted); font-weight:600; }
.jump a { background:var(--card); border:1px solid var(--line); border-radius:12px; padding:1px 10px; color:var(--link); text-decoration:none; }
.jump a:hover, .jump a:focus { background:var(--accent2); color:#2d2e83; border-color:var(--accent2); }
.card { scroll-margin-top:12px; }
html { scroll-behavior:smooth; }