:root{
  --bg:#f6f8fb; --surface:#ffffff; --surface-2:#f9fafc;
  --ink:#0f1826; --ink-2:#33415a; --muted:#64748b; --faint:#94a3b8;
  --line:#e5e9f0; --line-2:#eef2f7;
  --brand:#1e4d84; --brand-700:#173c68; --brand-300:#5b8bc0; --brand-soft:#eef4fb; --brand-softer:#f5f9fd;
  --ok:#0f7a48; --ok-soft:#e6f6ee; --amber:#b4540a; --amber-soft:#fcece2;
  --sh-sm:0 1px 2px rgba(15,24,38,.05);
  --sh:0 1px 3px rgba(15,24,38,.06), 0 1px 2px rgba(15,24,38,.04);
  --sans:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;
  --radius:14px;
}
*{box-sizing:border-box;}
body{margin:0;font-family:var(--sans);color:var(--ink);background:var(--bg);
  line-height:1.55;font-size:15px;-webkit-font-smoothing:antialiased;}
.icon{width:18px;height:18px;stroke:currentColor;stroke-width:1.9;fill:none;
  stroke-linecap:round;stroke-linejoin:round;flex:0 0 auto;}
.icon-sm{width:15px;height:15px;stroke-width:2;}
.hidden{display:none !important;}

/* ---------- top bar (deep gradient) ---------- */
.topbar{background:linear-gradient(118deg,#081a2e 0%,#112f4f 46%,#1e4d84 100%);
  border-bottom:1px solid rgba(255,255,255,.08);position:sticky;top:0;z-index:40;
  box-shadow:0 10px 34px -20px rgba(8,20,34,.85);}
.tb-inner{max-width:960px;margin:0 auto;padding:20px 26px;display:flex;align-items:center;justify-content:space-between;gap:16px;}
.brand{display:flex;align-items:center;gap:14px;}
.mark{width:46px;height:46px;border-radius:12px;flex:0 0 auto;
  background:rgba(255,255,255,.13);border:1px solid rgba(255,255,255,.22);
  color:#fff;display:grid;place-items:center;}
.mark .icon{width:24px;height:24px;stroke:#fff;}
.b-title{font-size:18px;font-weight:650;letter-spacing:-.01em;line-height:1.2;color:#fff;}
.b-sub{font-size:12.5px;color:#bcd3ec;margin-top:2px;}
.status{display:flex;align-items:center;gap:16px;font-size:12.5px;color:#bcd3ec;font-variant-numeric:tabular-nums;}
.status .s{display:flex;align-items:center;gap:6px;white-space:nowrap;}
.status b{color:#fff;font-weight:600;}
.status .down{color:#f0a366;font-weight:600;}
.dot{width:7px;height:7px;border-radius:50%;background:#5fe0a0;box-shadow:0 0 0 3px rgba(95,224,160,.2);}
.dot.bad{background:#f0a366;box-shadow:0 0 0 3px rgba(240,163,102,.2);}
@media(max-width:720px){.status .s.hide{display:none;}}

/* ---------- tabs ---------- */
.tabs{background:var(--surface);border-bottom:1px solid var(--line);overflow-x:auto;scrollbar-width:none;}
.tabs::-webkit-scrollbar{display:none;}
.tabs-inner{max-width:920px;margin:0 auto;padding:0 24px;display:flex;}
.tab{appearance:none;background:none;border:0;cursor:pointer;font-family:var(--sans);
  display:flex;align-items:center;gap:8px;padding:13px 4px;margin-right:22px;white-space:nowrap;
  font-size:14px;color:var(--muted);font-weight:500;border-bottom:2px solid transparent;margin-bottom:-1px;}
.tab:hover{color:var(--ink-2);}
.tab.active{color:var(--brand);border-bottom-color:var(--brand);font-weight:600;}
.tab .icon{width:16px;height:16px;}
.tab:focus-visible{outline:2px solid var(--brand-300);outline-offset:3px;border-radius:4px;}

/* ---------- layout ---------- */
.tab-panel{display:none;max-width:820px;margin:30px auto 10px;padding:0 24px;}
.tab-panel.active{display:block;}

/* ---------- search ---------- */
.searchbar{display:flex;gap:10px;flex-wrap:wrap;align-items:stretch;}
.field{flex:1 1 320px;display:flex;align-items:center;gap:10px;background:var(--surface);
  border:1px solid var(--line);border-radius:12px;padding:0 14px;box-shadow:var(--sh-sm);transition:border-color .15s,box-shadow .15s;}
.field:focus-within{border-color:var(--brand-300);box-shadow:0 0 0 4px var(--brand-soft);}
.field .icon{color:var(--faint);}
.field input{flex:1;border:0;outline:0;background:none;color:var(--ink);font-size:15px;font-family:var(--sans);padding:13px 0;min-width:0;}
.field input::placeholder{color:var(--faint);}
.sel{position:relative;display:flex;align-items:center;}
.sel.field-grow{flex:1 1 320px;}
.sel.field-grow select{width:100%;}
select{appearance:none;border:1px solid var(--line);border-radius:12px;background:var(--surface);color:var(--ink-2);
  font-size:13.5px;font-family:var(--sans);padding:0 34px 0 14px;height:100%;min-height:48px;box-shadow:var(--sh-sm);cursor:pointer;}
select:focus{outline:none;border-color:var(--brand-300);box-shadow:0 0 0 4px var(--brand-soft);}
.chev{position:absolute;right:12px;pointer-events:none;color:var(--faint);}
.btn{appearance:none;border:0;cursor:pointer;font-family:var(--sans);border-radius:12px;padding:0 22px;min-height:48px;
  font-size:14.5px;font-weight:600;color:#fff;background:linear-gradient(180deg,#26578f,var(--brand-700));
  box-shadow:var(--sh-sm);display:flex;align-items:center;gap:8px;transition:filter .15s,transform .1s;}
.btn:hover{filter:brightness(1.07);}
.btn:active{transform:translateY(1px);}
.btn:disabled{opacity:.55;cursor:not-allowed;filter:none;}
.btn .icon{stroke:#fff;}

.chips{display:flex;flex-wrap:wrap;gap:8px;margin-top:14px;align-items:center;}
.chips .lbl{font-size:12.5px;color:var(--muted);margin-right:2px;}
.chip{background:var(--surface);color:var(--ink-2);border:1px solid var(--line);border-radius:20px;
  padding:6px 13px;font-size:12.5px;font-weight:500;cursor:pointer;font-family:var(--sans);transition:all .15s;}
.chip:hover{border-color:var(--brand-300);color:var(--brand);background:var(--brand-softer);}

/* ---------- status + loader ---------- */
.status-line{min-height:8px;font-size:13.5px;color:var(--muted);margin:8px 2px 0;}
.status-line.error{color:var(--amber);display:flex;align-items:center;gap:7px;}
.loader{display:flex;flex-direction:column;align-items:center;gap:18px;padding:42px 0 34px;}
.scan{width:420px;max-width:90vw;height:262px;position:relative;color:var(--brand);display:grid;place-items:center;
  background:#fff;border-radius:20px;border:1px solid var(--line);box-shadow:var(--sh);overflow:hidden;}
.lottie{width:396px;max-width:86vw;height:248px;}
.scan-fallback{position:absolute;inset:0;width:96px;height:96px;margin:auto;}
.loader .cap{transition:opacity .25s ease;}
.scan.has-lottie .scan-fallback{display:none;}
.scan-fallback .ring{position:absolute;inset:0;border-radius:50%;border:3px solid var(--brand-soft);}
.scan-fallback .arc{position:absolute;inset:0;border-radius:50%;border:3px solid transparent;border-top-color:var(--brand);animation:spin 1s linear infinite;}
.scan-fallback .icon{position:absolute;inset:0;margin:auto;width:30px;height:30px;stroke-width:1.7;}
.loader .cap{color:var(--ink-2);font-size:14px;font-weight:500;text-align:center;}
@keyframes spin{to{transform:rotate(360deg);}}
@media(prefers-reduced-motion:reduce){.scan-fallback .arc{animation:none;}}

/* ---------- result card ---------- */
.card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);
  box-shadow:var(--sh);padding:24px 26px;margin-top:16px;animation:rise .32s cubic-bezier(.2,.7,.3,1) both;}
@keyframes rise{from{opacity:0;transform:translateY(6px);}to{opacity:1;transform:none;}}
.eyebrow{display:flex;align-items:center;gap:10px;flex-wrap:wrap;}
.eyebrow .lab{font-size:11px;font-weight:700;letter-spacing:.09em;color:var(--faint);text-transform:uppercase;}
.pill{display:inline-flex;align-items:center;gap:5px;font-size:11.5px;font-weight:600;padding:3px 10px 3px 8px;border-radius:20px;background:var(--ok-soft);color:var(--ok);}
.pill.ungrounded{background:var(--amber-soft);color:var(--amber);}
.pill .icon-sm{stroke:currentColor;}
.pill-blue{background:var(--brand-soft);color:var(--brand);padding:3px 10px;}
.icon-btn{margin-left:auto;appearance:none;background:none;border:1px solid var(--line);border-radius:9px;
  color:var(--muted);cursor:pointer;padding:6px 11px;font-size:12.5px;font-family:var(--sans);display:flex;align-items:center;gap:6px;transition:all .15s;}
.icon-btn:hover{color:var(--brand);border-color:var(--brand-300);background:var(--brand-softer);}
.answer{font-size:15.5px;line-height:1.72;color:var(--ink);margin-top:13px;max-width:64ch;}
.answer p{margin:0 0 12px;}.answer p:last-child{margin-bottom:0;}
.answer br+br{content:"";display:block;margin-top:8px;}
.sum-title{font-size:18px;font-weight:650;margin:6px 0 10px;letter-spacing:-.01em;}
.m{display:inline-flex;align-items:center;justify-content:center;min-width:17px;height:17px;padding:0 4px;
  background:var(--brand-soft);color:var(--brand);font-size:11px;font-weight:700;border-radius:5px;
  text-decoration:none;margin:0 1px;cursor:pointer;vertical-align:1px;transition:all .12s;}
.m:hover{background:var(--brand);color:#fff;}

.sec-h{display:flex;align-items:center;gap:8px;font-size:11px;font-weight:700;letter-spacing:.07em;
  color:var(--faint);text-transform:uppercase;margin:24px 0 11px;}
.sec-h .icon{width:14px;height:14px;stroke:var(--faint);}

/* related (graph rag) */
.related{margin-top:18px;padding:16px 18px;border-radius:12px;background:var(--brand-softer);border:1px solid var(--line-2);}
.related .sec-h{margin-top:0;color:var(--brand);}
.related .sec-h .icon{stroke:var(--brand);}
.gtag{margin-left:2px;font-size:9px;font-weight:700;letter-spacing:.06em;background:var(--brand);color:#fff;padding:2px 6px;border-radius:5px;}
.rhint{font-size:12.5px;color:var(--muted);margin:0 0 11px;}
.drow{display:flex;flex-wrap:wrap;gap:8px;}
.dchip{display:inline-flex;align-items:center;gap:8px;background:var(--surface);border:1px solid var(--line);
  border-radius:10px;padding:8px 12px;font-size:13px;color:var(--ink-2);cursor:pointer;font-weight:500;
  font-family:var(--sans);transition:all .15s;box-shadow:var(--sh-sm);text-align:left;}
.dchip:hover{border-color:var(--brand-300);background:var(--brand-soft);color:var(--brand);}
.dchip .icon-sm{color:var(--faint);}
.dchip:hover .icon-sm{color:var(--brand);}
.dchip .cc{font-size:10px;color:var(--faint);text-transform:uppercase;letter-spacing:.03em;}
.dchip:hover .cc{color:var(--brand-300);}
.auth-row{display:flex;flex-wrap:wrap;gap:7px;margin-top:9px;align-items:center;}
.auth-row .al{font-size:11.5px;color:var(--muted);}
.auth-chip{font-size:11.5px;color:var(--muted);background:var(--surface);border:1px dashed var(--line);border-radius:16px;padding:3px 10px;}

/* citations */
.cites{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:9px;}
.cites li{display:flex;gap:12px;border:1px solid var(--line);border-radius:11px;padding:13px 15px;background:var(--surface-2);transition:background .35s;}
.cites li .ci{width:30px;height:30px;flex:0 0 auto;border-radius:8px;background:var(--brand-soft);color:var(--brand);display:grid;place-items:center;}
.cites li .ci .icon-sm{stroke:var(--brand);}
.cbody{flex:1;min-width:0;}
.cnum{font-weight:700;color:var(--brand);margin-right:6px;font-variant-numeric:tabular-nums;}
.cdoc{font-weight:600;color:var(--ink);}
.catb{display:inline-block;font-size:10px;text-transform:uppercase;letter-spacing:.03em;background:var(--brand-soft);
  color:var(--brand);padding:2px 8px;border-radius:20px;margin-left:7px;vertical-align:1px;}
.cmeta{font-size:12.5px;color:var(--muted);margin-top:4px;display:flex;align-items:center;gap:6px;flex-wrap:wrap;font-variant-numeric:tabular-nums;}
.cmeta a{color:var(--brand);text-decoration:none;display:inline-flex;align-items:center;gap:4px;font-weight:500;}
.cmeta a:hover{text-decoration:underline;}
.cmeta a .icon-sm{stroke:var(--brand);width:13px;height:13px;}
.flash{background:#fff7e6 !important;}

/* graph tab */
.graph-groups{margin-top:16px;display:flex;flex-direction:column;gap:16px;}
.ghead{display:flex;align-items:center;gap:9px;font-size:11px;font-weight:700;letter-spacing:.06em;
  color:var(--faint);text-transform:uppercase;margin-bottom:10px;}
.gcount{background:var(--brand-soft);color:var(--brand);font-weight:700;border-radius:20px;padding:1px 9px;font-size:11px;font-variant-numeric:tabular-nums;}

/* empty */
.empty{text-align:center;color:var(--muted);padding:38px 22px;margin-top:14px;
  border:1px dashed var(--line);border-radius:var(--radius);background:var(--surface-2);}
.empty-ic{width:46px;height:46px;border-radius:12px;margin:0 auto 12px;background:var(--brand-soft);color:var(--brand);display:grid;place-items:center;}
.empty-ic .icon{width:22px;height:22px;stroke:var(--brand);}
.empty p{margin:0 auto;max-width:460px;font-size:14px;}

.hint{color:var(--muted);font-size:13.5px;margin:0 0 14px;}

/* ---------- About tab ---------- */
#tab-about{max-width:1000px;}
.about-metrics{display:flex;gap:10px;flex-wrap:wrap;margin-bottom:16px;}
.metric{flex:1 1 0;min-width:118px;background:var(--surface);border:1px solid var(--line);border-radius:11px;
  padding:11px 14px;box-shadow:var(--sh-sm);}
.metric .v{font-size:18px;font-weight:750;color:var(--brand);font-variant-numeric:tabular-nums;line-height:1;}
.metric .v.ok{color:var(--ok);}
.metric .k{font-size:10px;color:var(--muted);margin-top:4px;text-transform:uppercase;letter-spacing:.03em;}
.about-arch{border:1px solid var(--line);border-radius:14px;overflow:hidden;background:#fff;box-shadow:var(--sh);}
.about-arch img{width:100%;display:block;}
.about-note{color:var(--ink-2);font-size:14px;line-height:1.65;max-width:70ch;margin:16px 2px 0;}
.about-eval{margin-top:24px;}
.about-h{font-size:16px;font-weight:650;color:var(--ink);margin:0 0 6px;padding-top:22px;border-top:1px solid var(--line);}
.about-sub{font-size:13.5px;color:var(--ink-2);margin:0;}
.about-h3{font-size:11px;text-transform:uppercase;letter-spacing:.06em;color:var(--faint);margin:20px 0 8px;font-weight:700;}
.about-table{border-collapse:collapse;width:100%;max-width:440px;font-size:13px;margin:2px 0;box-shadow:var(--sh-sm);border-radius:8px;overflow:hidden;}
.about-table.wide{max-width:100%;}
.about-table th,.about-table td{border:1px solid var(--line);padding:7px 13px;text-align:left;}
.about-table th{background:var(--accent-soft);color:var(--brand);font-weight:600;font-size:10.5px;text-transform:uppercase;letter-spacing:.03em;}
.about-table td{font-variant-numeric:tabular-nums;color:var(--ink-2);}
.about-table tr.tot td{font-weight:700;background:var(--surface-2);color:var(--ink);}
.about-list{margin:2px 0;padding-left:20px;font-size:13.5px;line-height:1.7;color:var(--ink-2);}
.about-list li{margin:5px 0;}

/* ---------- Golden Set tab ---------- */
#tab-golden{max-width:960px;}
.gs-controls{display:flex;gap:10px;flex-wrap:wrap;align-items:stretch;margin-bottom:6px;}
.gs-controls .field{flex:1 1 220px;}
.gs-dl{display:inline-flex;align-items:center;gap:7px;background:var(--surface);border:1px solid var(--line);
  border-radius:12px;padding:0 15px;min-height:48px;font-size:13px;font-weight:600;color:var(--brand);
  text-decoration:none;box-shadow:var(--sh-sm);}
.gs-dl:hover{border-color:var(--brand-300);background:var(--brand-softer);}
.gs-dl .icon{stroke:var(--brand);}
.gs-list{display:flex;flex-direction:column;gap:9px;margin-top:6px;}
.gs-item{border:1px solid var(--line);border-radius:12px;background:var(--surface);padding:13px 15px;box-shadow:var(--sh-sm);}
.gs-top{display:flex;align-items:center;gap:9px;flex-wrap:wrap;}
.gs-n{font-size:11px;font-weight:700;color:var(--faint);font-variant-numeric:tabular-nums;}
.gs-vb{display:inline-flex;align-items:center;gap:4px;font-size:10.5px;font-weight:700;padding:2px 9px 2px 7px;border-radius:20px;white-space:nowrap;}
.gs-vb.ok{background:var(--ok-soft);color:var(--ok);}
.gs-vb.ok .icon{stroke:var(--ok);}
.gs-vb.partial{background:var(--amber-soft);color:var(--amber);padding:2px 9px;}
.gs-vb.bad{background:#fde8e8;color:#c0392b;padding:2px 9px;}
.gs-rank{font-size:10px;font-weight:600;color:var(--muted);background:var(--surface-2);border:1px solid var(--line);
  padding:2px 8px;border-radius:20px;font-variant-numeric:tabular-nums;white-space:nowrap;}
.gs-rank.top{color:var(--ok);background:var(--ok-soft);border-color:transparent;}
.gs-q{font-size:14px;font-weight:600;color:var(--ink);flex:1 1 220px;line-height:1.35;}
.gs-run{flex:0 0 auto;background:linear-gradient(180deg,#26578f,var(--brand-700));color:#fff;border:0;
  border-radius:9px;padding:7px 16px;font-size:13px;font-weight:600;cursor:pointer;font-family:var(--sans);}
.gs-run:hover{filter:brightness(1.07);}
.gs-run:disabled{opacity:.6;cursor:not-allowed;}
.gs-exp{font-size:12.5px;color:var(--muted);margin-top:8px;line-height:1.55;}
.gs-lbl{font-size:10px;font-weight:700;text-transform:uppercase;letter-spacing:.04em;color:var(--faint);
  background:var(--surface-2);border:1px solid var(--line);padding:1px 7px;border-radius:5px;margin-right:5px;}
.gs-src{color:var(--faint);}
.gs-res{margin-top:11px;padding-top:11px;border-top:1px dashed var(--line);font-size:14px;color:var(--ink);}
.gs-badges{display:flex;gap:7px;flex-wrap:wrap;margin-bottom:8px;}
.gs-badge{display:inline-flex;align-items:center;gap:5px;font-size:11.5px;font-weight:600;padding:3px 10px 3px 8px;border-radius:20px;}
.gs-badge.ok{background:var(--ok-soft);color:var(--ok);}
.gs-badge.ok .icon{stroke:var(--ok);}
.gs-badge.warn{background:var(--amber-soft);color:var(--amber);}
.gs-badge.warn .icon{stroke:var(--amber);}
.gs-answer{line-height:1.65;}
.gs-meta{font-size:11.5px;color:var(--faint);margin-top:8px;}

footer{max-width:820px;margin:24px auto 0;padding:20px 24px 34px;color:var(--faint);font-size:12px;
  border-top:1px solid var(--line);text-align:center;}

@media(max-width:600px){.tab-panel{padding:0 16px;}.tb-inner{padding:12px 16px;}}