:root {
  --navy: #0b1f3a;
  --navy-2: #13294b;
  --accent: #0f9f8f;        /* decision model */
  --accent-strong: #0b7f72;
  --accent-soft: #d6f3ef;
  --llm: #64748b;           /* regular LLM: deliberately neutral */
  --llm-soft: #e7ebf0;
  --bg: #f6f7f9;
  --card: #ffffff;
  --ink: #0f172a;
  --muted: #4b5563;
  --line: #dde2e8;
  --ok: #0b7f4f;
  --bad: #b42318;
  --code-bg: #0b1f3a;
  --code-ink: #e6edf6;
  --radius: 10px;
  --font: system-ui, -apple-system, "Segoe UI", Roboto, Arial, sans-serif;
  --mono: ui-monospace, "Cascadia Code", Consolas, Menlo, monospace;
}
@media (prefers-color-scheme: dark) {
  :root {
    --accent: #2dd4bf; --accent-strong: #5eead4; --accent-soft: #123b3a;
    --llm: #94a3b8; --llm-soft: #1e2a3b;
    --bg: #07111f; --card: #0d1b2e; --ink: #e6edf6; --muted: #a3b1c2; --line: #1f3048;
    --ok: #4ade80; --bad: #f87171; --code-bg: #050c17;
  }
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body { margin: 0; font: 16px/1.5 var(--font); color: var(--ink); background: var(--bg); }
a { color: inherit; }
:focus-visible { outline: 3px solid var(--accent); outline-offset: 2px; border-radius: 4px; }
.wrap { max-width: 1120px; margin: 0 auto; padding: 0 20px; }
.skip { position: absolute; left: -999px; top: 8px; background: var(--card); padding: 8px 12px; z-index: 10; }
.skip:focus { left: 8px; }

/* header */
.top { background: var(--navy); color: #fff; padding-bottom: 36px; }
.bar { display: flex; align-items: center; justify-content: space-between; gap: 12px; padding-top: 14px; padding-bottom: 14px; flex-wrap: wrap; }
.brand { display: inline-flex; align-items: center; gap: 10px; font-weight: 600; letter-spacing: .01em; }
.mark { width: 18px; height: 14px; background: linear-gradient(var(--accent) 0 40%, transparent 40% 60%, #94a3b8 60%) ; border-radius: 3px; }
.top nav { display: flex; gap: 6px; flex-wrap: wrap; }
.top nav a { display: inline-flex; align-items: center; gap: 7px; text-decoration: none; color: #dbe5f1; font-size: 14px; padding: 7px 11px; border: 1px solid rgba(255,255,255,.18); border-radius: 999px; }
.top nav a:hover { color: #fff; border-color: rgba(255,255,255,.5); }
.hero h1 { font-size: clamp(30px, 5vw, 50px); line-height: 1.08; margin: 26px 0 14px; letter-spacing: -.02em; }
.vs { color: #8ea3bf; font-weight: 400; }
.lede { max-width: 720px; margin: 0; color: #cdd8e6; font-size: 18px; }
.lede strong.d { color: #5eead4; }
.lede strong.l { color: #cbd5e1; }

main { padding-top: 0; }
h2 { font-size: 22px; margin: 0 0 6px; letter-spacing: -.01em; }
.desc { color: var(--muted); margin: 0; max-width: 680px; }

/* tabs */
.tabs { display: flex; gap: 4px; margin-top: -22px; overflow-x: auto; scrollbar-width: none; }
.tabs::-webkit-scrollbar { display: none; }
.tab { flex: 0 0 auto; font: inherit; font-size: 15px; font-weight: 600; color: #dbe5f1; background: var(--navy-2); border: 0; padding: 11px 16px; border-radius: 10px 10px 0 0; cursor: pointer; }
.tab[aria-selected="true"] { background: var(--card); color: var(--ink); }
.tab:hover:not([aria-selected="true"]) { color: #fff; }
.tab .n { opacity: .55; font-weight: 500; margin-right: 6px; }

.panel { background: var(--card); border-radius: 0 var(--radius) var(--radius) var(--radius); padding: 26px 26px 18px; box-shadow: 0 1px 2px rgba(15,23,42,.06); }
.intro { display: flex; justify-content: space-between; gap: 20px; align-items: flex-start; flex-wrap: wrap; }
.intro > div:first-child { flex: 1 1 420px; }
.runbox { flex: 0 0 auto; }
.runbox { text-align: right; min-width: 220px; }
.run { font: inherit; font-weight: 700; font-size: 16px; color: #fff; background: var(--accent-strong); border: 0; border-radius: 999px; padding: 12px 26px; cursor: pointer; }
@media (prefers-color-scheme: dark) { .run { color: #04201d; background: var(--accent); } }
.run:hover { filter: brightness(1.08); }
.run:disabled { opacity: .55; cursor: progress; }
.status { margin: 8px 0 0; font-size: 14px; color: var(--muted); min-height: 1.5em; }
.status.warn { color: var(--bad); }

/* scoreboard */
.board { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 14px; margin-top: 22px; }
.side { border-radius: var(--radius); padding: 16px 18px 12px; border: 1px solid var(--line); position: relative; overflow: hidden; }
.side::before { content: ""; position: absolute; inset: 0 auto 0 0; width: 5px; }
.side.d::before { background: var(--accent); }
.side.l::before { background: var(--llm); }
.side.done.win { border-color: var(--accent); }
.who { margin: 0; font-weight: 700; display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
.model { font-weight: 400; color: var(--muted); font-size: 14px; }
.dot { display: inline-block; width: 10px; height: 10px; border-radius: 50%; background: var(--accent); flex: none; }
.l .dot, .dot.l { background: var(--llm); }
.dot.d { background: var(--accent); }
.clock { margin: 4px 0 8px; font: 700 44px/1.1 var(--font); font-variant-numeric: tabular-nums; letter-spacing: -.02em; }
.clock small { font-size: 18px; font-weight: 500; color: var(--muted); }
.side.running .clock { color: var(--accent-strong); }
.side.l.running .clock { color: var(--llm); }
.side dl { display: grid; grid-template-columns: repeat(4, auto); gap: 4px 18px; margin: 0; }
.side dl div { min-width: 0; }
.side dt { font-size: 12px; color: var(--muted); text-transform: uppercase; letter-spacing: .04em; }
.side dd { margin: 0; font-weight: 600; font-variant-numeric: tabular-nums; }
.verdict { grid-column: 1 / -1; margin: 2px 0 0; font-size: 17px; font-weight: 600; min-height: 1.5em; }
.verdict .big { color: var(--accent-strong); }
@media (prefers-color-scheme: dark) { .verdict .big { color: var(--accent); } }
.source { font-size: 13px; color: var(--muted); margin: 10px 0 0; }

/* rows */
.rows { margin-top: 14px; border-top: 1px solid var(--line); }
.row { display: grid; grid-template-columns: minmax(0, 1.25fr) minmax(0, 1fr) minmax(0, 1fr); gap: 16px; padding: 12px 0; border-bottom: 1px solid var(--line); align-items: start; }
.row.head { font-size: 12px; text-transform: uppercase; letter-spacing: .05em; color: var(--muted); padding: 10px 0 8px; }
.item .id { font-weight: 700; font-variant-numeric: tabular-nums; margin-right: 6px; }
.item .txt { color: var(--ink); }
.item .exp { display: block; font-size: 13px; color: var(--muted); margin-top: 3px; }
.cell { min-width: 0; }
.cell .lane { display: none; font-size: 12px; color: var(--muted); text-transform: uppercase; letter-spacing: .05em; margin-bottom: 2px; }
.ans { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; font-weight: 600; }
.badge { display: inline-flex; align-items: center; justify-content: center; width: 22px; height: 22px; border-radius: 50%; font-size: 13px; font-weight: 800; flex: none; }
.badge.ok { background: var(--ok); color: #fff; }
.badge.bad { background: var(--bad); color: #fff; }
.badge.na { background: var(--line); color: var(--muted); }
.meta { font-size: 13px; color: var(--muted); margin-top: 3px; }
.prob { display: flex; align-items: center; gap: 8px; margin-top: 5px; font-size: 13px; color: var(--muted); }
.prob .track { flex: 1; max-width: 140px; height: 6px; background: var(--accent-soft); border-radius: 3px; overflow: hidden; }
.prob .fill { height: 100%; background: var(--accent); border-radius: 3px; }
.lat { display: flex; align-items: center; gap: 8px; margin-top: 6px; font-size: 13px; font-variant-numeric: tabular-nums; }
.lat .track { flex: 1; height: 8px; border-radius: 4px; background: transparent; }
.lat .fill { height: 100%; border-radius: 4px; transition: width .45s ease-out; }
.cell.d .lat .fill { background: var(--accent); }
.cell.l .lat .fill { background: var(--llm); }
.lat .v { width: 62px; text-align: right; color: var(--muted); flex: none; }
.pending { color: var(--muted); font-weight: 400; }
.pending::after { content: ""; display: inline-block; width: 1em; text-align: left; animation: dots 1.2s steps(4) infinite; }
@keyframes dots { 0% { content: ""; } 25% { content: "."; } 50% { content: ".."; } 75% { content: "..."; } }
.err { color: var(--bad); font-weight: 600; }

/* json */
.json { margin-top: 18px; border: 1px solid var(--line); border-radius: var(--radius); }
.json > summary { cursor: pointer; padding: 12px 16px; font-weight: 600; list-style: none; display: flex; align-items: center; gap: 10px; }
.json > summary::-webkit-details-marker { display: none; }
.json > summary::before { content: ""; width: 8px; height: 8px; border-right: 2px solid currentColor; border-bottom: 2px solid currentColor; transform: rotate(-45deg); transition: transform .15s; }
.json[open] > summary::before { transform: rotate(45deg); }
.jsonbody { padding: 0 16px 16px; }
.note { font-size: 13px; color: var(--muted); margin: 0 0 10px; }
/* The JSON panels stay inside the card: grid tracks may shrink below their content
   (minmax(0, 1fr) + min-width: 0), long lines wrap, and anything still too wide scrolls
   inside its own block instead of widening the page. */
.json, .jsonbody { min-width: 0; max-width: 100%; }
.io { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 12px; }
.io > div { min-width: 0; }
.io h3 { font-size: 13px; margin: 0 0 6px; display: flex; align-items: center; gap: 6px; }
.io pre { margin: 0; background: var(--code-bg); color: var(--code-ink); font: 12.5px/1.5 var(--mono); padding: 12px; border-radius: 8px; overflow: auto; max-height: 360px; max-width: 100%; white-space: pre-wrap; overflow-wrap: anywhere; word-break: break-word; tab-size: 2; }

/* summary chart */
.summary, .costs, .how { background: var(--card); border-radius: var(--radius); padding: 24px 26px; margin-top: 18px; }
.chart { margin-top: 16px; display: grid; gap: 14px; }
.crow { display: grid; grid-template-columns: 170px minmax(0, 1fr) 92px; gap: 6px 14px; align-items: center; }
.crow .name { font-weight: 600; font-size: 15px; }
.crow .bars { display: grid; gap: 4px; }
.crow .b { display: flex; align-items: center; gap: 8px; font-size: 13px; font-variant-numeric: tabular-nums; }
.crow .b span.fill { height: 14px; border-radius: 3px; min-width: 2px; transition: width .5s ease-out; }
.crow .b.d span.fill { background: var(--accent); }
.crow .b.l span.fill { background: var(--llm); }
.crow .acc { font-size: 13px; color: var(--muted); line-height: 1.45; font-variant-numeric: tabular-nums; }
.crow .acc b { color: var(--ink); }
.legend { display: flex; gap: 18px; font-size: 13px; color: var(--muted); margin: 14px 0 0; }
.legend > span { display: inline-flex; gap: 6px; align-items: center; }
.how ol { margin: 8px 0 0; padding-left: 22px; max-width: 760px; }
.how li { margin: 4px 0; }
.fine { font-size: 14px; color: var(--muted); max-width: 760px; }

.foot { padding: 26px 0 40px; color: var(--muted); font-size: 14px; }
.foot a { color: var(--ink); }

@media (max-width: 760px) {
  .panel { padding: 18px 16px 12px; }
  .runbox { text-align: left; width: 100%; }
  .run { width: 100%; }
  .board { gap: 10px; }
  .side { padding: 12px 12px 10px 16px; }
  .clock { font-size: 32px; }
  .side dl { grid-template-columns: 1fr 1fr; }
  .row { grid-template-columns: 1fr 1fr; gap: 8px 12px; }
  .row .item { grid-column: 1 / -1; }
  .row.head { display: none; }
  .cell .lane { display: block; }
  .io { grid-template-columns: 1fr; }
  .crow { grid-template-columns: 1fr; }
  .crow .acc { display: flex; gap: 14px; }
  .summary, .how { padding: 18px 16px; }
  .top nav a span { font-size: 13px; }
}
@media (max-width: 420px) {
  .who .model { display: block; width: 100%; }
}
@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; animation: none !important; }
}

.race { height: 6px; border-radius: 3px; background: var(--line); overflow: hidden; margin: 0 0 12px; }
.race .fill { display: block; height: 100%; width: 0; border-radius: 3px; transition: width .35s ease-out; }
.d .race .fill { background: var(--accent); }
.l .race .fill { background: var(--llm); }
@media (max-width: 760px) {
  .who { font-size: 15px; }
  .side dl { grid-template-columns: 1fr; gap: 2px; }
  .side dl div { display: flex; justify-content: space-between; gap: 8px; align-items: baseline; }
  .side dt { text-transform: none; letter-spacing: 0; font-size: 12px; }
  .side dd { font-size: 13px; text-align: right; }
}
@media (prefers-color-scheme: dark) { .top { border-bottom: 1px solid var(--line); } }
@media (max-width: 760px) {
  .side dl div:last-child { display: none; }
  .who { display: block; }
  .who .dot { margin-right: 6px; vertical-align: 1px; }
  .who .model { display: block; font-size: 13px; }
  .board { margin-top: 18px; }
}
@media (max-width: 760px) { .who .model { white-space: nowrap; overflow: hidden; text-overflow: ellipsis; font-size: 12px; } }

/* cost */
.costrow { display: grid; grid-template-columns: auto minmax(0, 1fr) auto; grid-template-areas: "lbl track v"; align-items: center; gap: 4px 10px; margin-top: 10px; font-size: 13px; }
.costrow .lbl { grid-area: lbl; font-size: 12px; color: var(--muted); text-transform: uppercase; letter-spacing: .04em; }
.costrow .track { grid-area: track; display: block; height: 8px; border-radius: 4px; background: var(--line); overflow: hidden; }
.costrow .fill { display: block; height: 100%; width: 0; border-radius: 4px; transition: width .45s ease-out; }
.d .costrow .fill { background: var(--accent); }
.l .costrow .fill { background: var(--llm); }
.costrow .v { grid-area: v; font-weight: 700; font-variant-numeric: tabular-nums; }
.costsub { margin: 3px 0 0; font-size: 12.5px; color: var(--muted); font-variant-numeric: tabular-nums; min-height: 1.5em; }
.crow .acc.cheaper b { color: var(--accent-strong); font-size: 15px; }
@media (prefers-color-scheme: dark) { .crow .acc.cheaper b { color: var(--accent); } }
.tablewrap { margin-top: 18px; max-width: 100%; overflow-x: auto; border: 1px solid var(--line); border-radius: var(--radius); }
.costtable { width: 100%; border-collapse: collapse; font-size: 14px; font-variant-numeric: tabular-nums; }
.costtable th, .costtable td { padding: 7px 14px; text-align: right; white-space: nowrap; }
.costtable thead th { font-size: 12px; text-transform: uppercase; letter-spacing: .04em; color: var(--muted); font-weight: 600; border-bottom: 1px solid var(--line); }
.costtable thead th:first-child, .costtable th.m { text-align: left; font-weight: 500; }
.costtable th.m .dot { margin-right: 7px; vertical-align: 0; }
.costtable tr.grp th { text-align: left; padding-top: 12px; border-top: 1px solid var(--line); }
.costtable tbody tr.grp:first-child th { border-top: 0; }
.costtable tr.grp th > span:first-child { font-weight: 700; }
.costtable tr.grp .x { float: right; font-weight: 700; color: var(--accent-strong); }
@media (prefers-color-scheme: dark) { .costtable tr.grp .x { color: var(--accent); } }
.costtable tr.l th, .costtable tr.l td { padding-bottom: 12px; }
.prices { font-size: 13px; margin: 14px 0 0; max-width: none; }
.prices a { color: var(--ink); }
@media (max-width: 760px) {
  .costs { padding: 18px 16px; }
  .costrow { grid-template-columns: minmax(0, 1fr); grid-template-areas: "lbl" "v" "track"; gap: 2px; }
  .costrow .lbl { text-transform: none; letter-spacing: 0; }
  .crow .acc.cheaper { display: block; }
  .costtable { font-size: 13px; }
  .costtable th, .costtable td { padding: 6px 8px; }
  .costtable thead th { font-size: 11px; white-space: normal; }
  .costtable .perrun, .costtable .percall { display: none; } /* per call and per run are on the scoreboard above */
  .costtable tr.grp .x { float: none; display: block; font-size: 13px; }
}