/*
Author: GPT-6.1 Sol (original: Claude Fable 5.2 Medium)
Date: 13-November-2026
PURPOSE: The look of the Logical Arbitrage terminal page. Deep navy-black with the arena's orange, the same
  family as Son Pham's arena site, laid out as a dense grid of panels. Holds the colour tokens, the type
  scale, the twelve-column grid and its phone fallback, the table and bar styles, and every animation
  (bars growing when a panel scrolls into view, the hero chart, the ticker). All motion is switched off for
  anyone who asks their device for less of it. Read by index.html; class names are produced by site.js.
SRP/DRY check: Pass - one stylesheet; replaces the earlier research-instrument sheet entirely.
*/

/* ---- Tokens. Colour means something: orange is ours, cyan is exact, red is lossy or down. ---- */
:root{
  --bg:#05080f; --panel:#0a101c; --panel2:#0d1524; --line:#17233b; --line2:#22335a;
  --text:#d7e0ee; --dim:#7385a3; --faint:#44557a;
  --orange:#ff851b; --amber:#ffb469; --cyan:#58c7ff; --red:#ff5a4f; --green:#39d98a; --violet:#a98bff;
  --mono:"JetBrains Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  --sans:"Archivo","Helvetica Neue",Arial,sans-serif;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:56px}
body{
  margin:0;color:var(--text);font:13px/1.5 var(--mono);
  /* A faint orange glow top-left over a hairline grid, so the page reads as an instrument, not a slab. */
  background:
    radial-gradient(900px 500px at 12% -10%,rgba(255,133,27,.13),transparent 60%),
    radial-gradient(700px 500px at 100% 0%,rgba(88,199,255,.07),transparent 60%),
    linear-gradient(rgba(255,255,255,.018) 1px,transparent 1px) 0 0/100% 28px,
    linear-gradient(90deg,rgba(255,255,255,.018) 1px,transparent 1px) 0 0/28px 100%,
    var(--bg);
  background-attachment:fixed;
  font-variant-numeric:tabular-nums;-webkit-font-smoothing:antialiased;
}
a{color:var(--cyan);text-decoration:none}
a:hover{text-decoration:underline}
b{color:#fff;font-weight:600}
.dim{color:var(--dim)} .small{font-size:11.5px}
:focus-visible{outline:2px solid var(--orange);outline-offset:2px}

/* ---- Status bar ---- */
.bar{position:sticky;top:0;z-index:20;display:flex;align-items:center;gap:18px;height:44px;padding:0 18px;
  background:rgba(5,8,15,.86);backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
.brand{font:800 13px/1 var(--sans);font-stretch:112%;letter-spacing:.14em;color:#fff;white-space:nowrap;display:flex;align-items:center;gap:10px}
.brand .dim{font-weight:500}
/* The pixel mark: a 2x2 block with one cell lit, echoing the arena's mark. */
.mark{width:14px;height:14px;background:
  linear-gradient(var(--orange),var(--orange)) 0 0/6px 6px no-repeat,
  linear-gradient(var(--line2),var(--line2)) 8px 0/6px 6px no-repeat,
  linear-gradient(var(--line2),var(--line2)) 0 8px/6px 6px no-repeat,
  linear-gradient(var(--amber),var(--amber)) 8px 8px/6px 6px no-repeat}
.keys{display:flex;gap:2px;overflow-x:auto;flex:1;scrollbar-width:none}
.keys::-webkit-scrollbar{display:none}
.keys a{color:var(--dim);font-size:11px;letter-spacing:.08em;padding:5px 8px;border-radius:2px;white-space:nowrap}
.keys a b{color:var(--orange);font-weight:800;margin-right:5px}
.keys a:hover{background:var(--panel2);color:var(--text);text-decoration:none}

/* ---- Headline ---- */
.head{padding:46px 18px 26px;max-width:1500px;margin:0 auto}
.head h1{margin:0 0 14px;font:900 clamp(34px,6.2vw,88px)/.95 var(--sans);font-stretch:118%;letter-spacing:-.025em;color:#fff;text-wrap:balance}
.head p{margin:0 0 6px;max-width:92ch;font:400 16px/1.55 var(--sans);color:#b9c6da}
.head p.small{font:400 12px/1.5 var(--mono);color:var(--dim)}

/* ---- Ticker ---- */
.ticker{display:grid;grid-template-columns:repeat(7,minmax(0,1fr));gap:1px;background:var(--line);
  border-block:1px solid var(--line);max-width:1500px;margin:0 auto}
/* The strip scrolls sideways on narrow screens without showing a scrollbar. */
.ticker{scrollbar-width:none} .ticker::-webkit-scrollbar{display:none}
.tick{background:var(--panel);padding:14px 16px 13px;min-width:0}
.tick .l{font-size:10px;letter-spacing:.16em;color:var(--dim)}
.tick .v{font:800 clamp(24px,2.7vw,40px)/1.05 var(--sans);font-stretch:108%;color:#fff;margin:5px 0 2px;letter-spacing:-.01em}
.tick:nth-child(-n+2) .v{color:var(--orange)}
.tick .n{font-size:11px;color:var(--dim)}

/* ---- Grid of panels ---- */
.grid{display:grid;grid-template-columns:repeat(12,minmax(0,1fr));gap:12px;padding:12px 18px 18px;max-width:1500px;margin:0 auto}
.panel{grid-column:span 12;background:linear-gradient(180deg,var(--panel2),var(--panel));border:1px solid var(--line);
  border-radius:3px;min-width:0;position:relative;opacity:0;transform:translateY(10px);transition:opacity .6s,transform .6s}
.panel.in{opacity:1;transform:none}
.panel::before{content:"";position:absolute;inset:-1px auto auto -1px;width:28px;height:2px;background:var(--orange)}
.panel h2{margin:0;display:flex;align-items:center;gap:10px;padding:9px 12px;border-bottom:1px solid var(--line);
  font:800 11px/1.2 var(--mono);letter-spacing:.14em;color:#eaf0f9}
.panel h2 .k{color:var(--bg);background:var(--orange);padding:1px 6px;font-weight:800;border-radius:1px}
.panel h2 .src{margin-left:auto;font-weight:400;letter-spacing:.06em}
.panel h2 .src a{color:var(--faint)} .panel h2 .src a:hover{color:var(--cyan)}
.body{padding:12px}
.p-ladder{grid-column:span 12} .p-time{grid-column:span 12}
.p-agent{grid-column:span 7} .p-measure{grid-column:span 5}
.p-wrong{grid-column:span 6} .p-nvidia{grid-column:span 6}
.cap{color:var(--dim);font-size:11.5px;margin:10px 0 0;max-width:110ch}
.sub{font:800 10px/1 var(--mono);letter-spacing:.16em;color:var(--dim);margin:16px 0 8px}
.sub:first-child{margin-top:0}

/* ---- Tables ---- */
table{width:100%;border-collapse:collapse}
th{font:600 10px/1.2 var(--mono);letter-spacing:.12em;color:var(--dim);text-align:left;padding:6px 8px;border-bottom:1px solid var(--line2);white-space:nowrap}
td{padding:6px 8px;border-bottom:1px solid var(--line);vertical-align:top}
tr:last-child td{border-bottom:0}
tbody tr:hover td{background:rgba(255,133,27,.045)}
td.num,th.num{text-align:right;white-space:nowrap}
td.hi{color:#fff;font-weight:600}
td.wrapless{white-space:nowrap}
.off td{color:var(--dim)} .off td.hi{color:var(--dim)}

/* ---- Bars. Width comes from --w and grows when the panel scrolls into view. ---- */
.track{height:10px;background:rgba(255,255,255,.04);position:relative;min-width:70px}
.fill{position:absolute;inset:0 auto 0 0;width:0;background:linear-gradient(90deg,#c25a00,var(--orange));
  transition:width 1.1s cubic-bezier(.2,.8,.2,1);transition-delay:calc(var(--i,0)*70ms)}
.in .fill{width:var(--w)}
.off .fill{background:repeating-linear-gradient(135deg,var(--faint) 0 3px,transparent 3px 6px)}
.stack{display:flex;height:16px;width:0;transition:width 1.1s cubic-bezier(.2,.8,.2,1);transition-delay:calc(var(--i,0)*90ms)}
.in .stack{width:var(--w)}
.stack i{display:block;height:100%}
.c0{background:var(--orange)} .c1{background:var(--cyan)} .c2{background:var(--red)} .c3{background:var(--violet)} .c4{background:var(--faint)}
.legend{display:flex;flex-wrap:wrap;gap:6px 16px;margin:0 0 10px;font-size:11px;color:var(--dim)}
.legend i{display:inline-block;width:9px;height:9px;margin-right:6px;vertical-align:-1px}

/* ---- Hero chart ---- */
.climb{display:grid;grid-template-columns:230px minmax(0,1fr);gap:18px;align-items:stretch}
.readouts{display:flex;flex-direction:column;gap:14px;border-right:1px solid var(--line);padding-right:14px}
.ro .l{font-size:10px;letter-spacing:.16em;color:var(--dim)}
.ro .v{font:900 54px/1 var(--sans);font-stretch:110%;letter-spacing:-.02em;color:#fff}
.ro.score .v{color:var(--orange)} .ro.score.down .v{color:var(--red)}
.ro .n{font-size:11px;color:var(--dim);min-height:2.6em}
.replay{margin-top:auto;align-self:flex-start;background:none;border:1px solid var(--line2);color:var(--text);
  font:600 11px var(--mono);letter-spacing:.12em;padding:7px 12px;cursor:pointer;border-radius:2px}
.replay:hover{border-color:var(--orange);color:var(--orange)}
svg{display:block;width:100%;height:auto;overflow:visible}
svg text{font-family:var(--mono);fill:var(--dim);font-size:12px}
/* Hero chart parts. Labels pop as the playhead reaches them. */
svg.hero text{font-size:13px}
.tk{fill:var(--dim);font-size:12px;letter-spacing:.08em}
.tk.or{fill:var(--orange);font-weight:800;letter-spacing:.14em}
.tk.wh{fill:#fff;font-weight:800;letter-spacing:.14em}
.zone{fill:var(--red);font-weight:800;font-size:12px;letter-spacing:.2em;opacity:.85}
.pop{opacity:0;transform:translateY(6px);transition:opacity .35s,transform .35s}
.pop.on{opacity:1;transform:none}
svg.hero .sv{fill:var(--amber);font:800 17px var(--mono)}
svg.hero .sv.dimv{fill:var(--dim)}
svg.hero .sn{fill:var(--dim);font-size:11.5px}
svg.hero .pv{fill:#05080f;font:800 15px var(--mono)}
svg.hero .best{fill:#fff;font:800 12px var(--mono);letter-spacing:.16em}
.ring{fill:none;stroke:#fff;stroke-width:2;transform-box:fill-box;transform-origin:center;animation:ring 1.8s ease-out infinite}
@keyframes ring{0%{transform:scale(1);opacity:.9}100%{transform:scale(3.2);opacity:0}}
.playhead{stroke:#fff;stroke-width:1;opacity:0;stroke-dasharray:2 4}
.axis{stroke:var(--line2);stroke-width:1}

/* ---- Speed panel: staircase on the left, streaming lanes on the right ---- */
.speed{display:grid;grid-template-columns:minmax(0,6fr) minmax(0,5fr);gap:22px;align-items:start}
.ro.big .v{font-size:64px;color:var(--orange);display:flex;align-items:baseline;gap:14px}
.ro.big .v em{font:800 22px var(--mono);color:#fff;font-style:normal}
.lane-row{display:grid;grid-template-columns:150px minmax(0,1fr) 96px;gap:12px;align-items:center;padding:9px 0;border-bottom:1px solid var(--line)}
.lane-row:last-child{border-bottom:0}
.lane-l{color:#fff;font-weight:600;font-size:12.5px} .lane-l span{display:block;color:var(--dim);font-weight:400;font-size:11px}
.lane-v{text-align:right;color:var(--amber);font:800 17px var(--mono)} .lane-v span{display:block;color:var(--dim);font:400 11px var(--mono)}
/* Each lane is a row of dots sliding right. The loop time is set inline from the build's real speed. */
.lane{height:14px;overflow:hidden;background:rgba(255,255,255,.035);border-radius:7px}
.lane i{display:block;height:100%;width:calc(100% + 180px);margin-left:-180px;
  background:radial-gradient(circle at 9px 7px,var(--orange) 2.6px,transparent 3.2px) 0 0/18px 14px;animation:flow linear infinite}
@keyframes flow{to{transform:translateX(180px)}}

/* ---- Change log controls ---- */
.tools{display:flex;flex-wrap:wrap;gap:6px;align-items:center;margin-bottom:10px}
.chip{background:none;border:1px solid var(--line2);color:var(--dim);font:600 10.5px var(--mono);letter-spacing:.1em;padding:5px 9px;cursor:pointer;border-radius:2px}
.chip:hover{color:var(--text)}
.chip.on{background:var(--orange);border-color:var(--orange);color:var(--bg)}
.tools input{flex:1;min-width:160px;background:var(--bg);border:1px solid var(--line2);color:var(--text);font:13px var(--mono);padding:6px 9px;border-radius:2px}
.tools .count{color:var(--dim);font-size:11px;margin-left:auto}
.scroll{max-height:520px;overflow:auto;border:1px solid var(--line)}
.scroll thead th{position:sticky;top:0;background:var(--panel2);z-index:1}
.tag{display:inline-block;font:800 9.5px/1 var(--mono);letter-spacing:.1em;padding:3px 6px;border-radius:1px;border:1px solid}
.tag.E{color:var(--cyan);border-color:rgba(88,199,255,.45)}
.tag.R{color:var(--cyan);border-color:rgba(88,199,255,.25);border-style:dashed}
.tag.L{color:var(--red);border-color:rgba(255,90,79,.45)}
.tag.H{color:var(--amber);border-color:rgba(255,180,105,.45)}
.area{color:var(--dim);letter-spacing:.08em;font-size:11px}

/* ---- Agent panel: the two recordings from the write-up ---- */
.media{display:grid;grid-template-columns:1fr 1fr;gap:10px}
.media figure{margin:0;border:1px solid var(--line);background:#000}
.media video{display:block;width:100%;aspect-ratio:16/9;object-fit:contain;background:#000}
.media figcaption{padding:7px 9px;font-size:11px;color:var(--dim);border-top:1px solid var(--line);background:var(--panel)}
.loop{display:grid;grid-template-columns:repeat(4,1fr);gap:1px;background:var(--line);border:1px solid var(--line);margin-top:10px}
.loop div{background:var(--panel);padding:9px 10px;font-size:11.5px;color:#b9c6da}
.loop b{display:block;color:var(--orange);font-size:10px;letter-spacing:.14em;margin-bottom:3px}

/* ---- Tiles ---- */
.tiles{display:grid;grid-template-columns:repeat(2,1fr);gap:1px;background:var(--line);border:1px solid var(--line)}
.tile{background:var(--panel);padding:11px 12px}
.tile .v{font:900 34px/1 var(--sans);font-stretch:108%;color:#fff}
.tile .l{font-size:11.5px;color:#b9c6da;margin-top:5px}
.tile .n{font-size:11px;color:var(--dim)}
.cells{display:grid;grid-template-columns:repeat(12,1fr);gap:4px;margin:8px 0}
.cells i{aspect-ratio:1;border:1px solid var(--line2);background:rgba(255,90,79,.14);opacity:0;transform:scale(.6);transition:all .4s;transition-delay:calc(var(--i)*60ms)}
.cells i.ok{background:var(--orange);border-color:var(--orange)}
.in .cells i{opacity:1;transform:none}
.lessons{margin:0;padding:0;list-style:none;counter-reset:n}
.lessons li{counter-increment:n;padding:8px 0 8px 34px;border-bottom:1px solid var(--line);position:relative;font:400 13.5px/1.5 var(--sans);color:#c6d2e4}
.lessons li:last-child{border:0}
.lessons li::before{content:counter(n,decimal-leading-zero);position:absolute;left:0;top:9px;color:var(--orange);font:800 11px var(--mono)}
.cards{display:grid;grid-template-columns:repeat(3,1fr);gap:1px;background:var(--line);border:1px solid var(--line)}
.card{background:var(--panel);padding:12px}
.card b{display:block;font:800 13px var(--sans);font-stretch:108%;letter-spacing:.06em;text-transform:uppercase}
.card span{color:#b9c6da;font-size:12px}
.split>div{min-width:0}
.split{display:grid;grid-template-columns:minmax(0,7fr) minmax(0,4fr);gap:16px}
.prose{font:400 13.5px/1.6 var(--sans);color:#c6d2e4;margin:12px 0 0;max-width:80ch}

/* ---- Footer ---- */
.foot{max-width:1500px;margin:0 auto;padding:6px 18px 40px}
.people{display:grid;grid-template-columns:repeat(3,1fr);gap:1px;background:var(--line);border:1px solid var(--line)}
.person{background:var(--panel);padding:14px}
.person b{font:900 20px/1.1 var(--sans);font-stretch:112%;letter-spacing:.02em;display:block;margin-bottom:6px}
.person:nth-child(-n+2) b{color:var(--orange)}
.person span{font:400 13px/1.5 var(--sans);color:#b9c6da}
.links{display:flex;flex-wrap:wrap;gap:8px 22px;margin:14px 0 10px;font-size:12px;letter-spacing:.06em}

/* ---- Narrow screens: one column, ticker scrolls sideways ---- */
@media (max-width:1050px){
  .p-ladder,.p-time,.p-agent,.p-measure,.p-wrong,.p-nvidia{grid-column:span 12}
  .split{grid-template-columns:1fr}
  .ticker{grid-template-columns:repeat(7,minmax(150px,1fr));overflow-x:auto}
}
@media (max-width:720px){
  .head{padding:28px 16px 18px} .grid{padding:12px 16px} .foot{padding:6px 16px 32px}
  .climb,.speed{grid-template-columns:minmax(0,1fr)} .readouts{flex-direction:row;flex-wrap:wrap;border-right:0;border-bottom:1px solid var(--line);padding:0 0 12px}
  .ro .v{font-size:36px} .ro .n{min-height:0} .replay{margin:0}
  .media,.cards,.people{grid-template-columns:1fr} .loop{grid-template-columns:1fr 1fr}
  .flag{display:none} .scroll{max-height:none}
  .wide{overflow-x:auto} .wide table{min-width:640px}
}
/* Charts retain readable labels; scrolling stays inside the panel, never the page. */
.chart-scroll{min-width:0;max-width:100%;overflow-x:auto}
.chart-hint{display:none}
@media (max-width:720px){
  html{scroll-padding-top:88px}
  .bar{height:auto;min-height:76px;flex-wrap:wrap;gap:6px;padding:10px 16px 6px}
  .brand{font-size:11px;letter-spacing:.1em;gap:8px}
  .mark{flex-shrink:0}
  .keys{flex:0 0 100%;min-width:0;padding-bottom:3px}
  .keys a{padding:5px 8px}
  .panel h2{flex-wrap:wrap;line-height:1.5;letter-spacing:.08em}
  .panel h2 .src{white-space:nowrap}
  .body th,.body td.num,.body td.wrapless{white-space:normal;overflow-wrap:anywhere}
  .chart-scroll svg{min-width:900px}
  #wrong .chart-scroll svg{min-width:700px}
  .chart-hint{display:block;color:var(--dim);font-size:11px;margin:6px 0}
}
/* ---- Less motion on request: everything is simply in its final state ---- */
@media (prefers-reduced-motion:reduce){
  *{transition:none!important;animation:none!important}
  .panel{opacity:1;transform:none}
}