@font-face{font-family:'DM Sans';font-weight:400;font-display:swap;src:url(assets/fonts/topk-0.ttf) format('truetype')}
@font-face{font-family:'DM Sans';font-weight:500;font-display:swap;src:url(assets/fonts/topk-1.ttf) format('truetype')}
@font-face{font-family:'DM Sans';font-weight:600;font-display:swap;src:url(assets/fonts/topk-2.ttf) format('truetype')}
@font-face{font-family:'Source Serif 4';font-weight:400;font-display:swap;src:url(assets/fonts/topk-3.ttf) format('truetype')}

/* Neutral near-black with a single accent. Swap --accent / --accent-2 to rebrand. */
:root{
  --bg:#09090b; --bg-2:#111114; --ink:#ededf0; --muted:#a1a1aa; --faint:#63636d; --line:#222228; --line-2:#303038;
  --accent:#8b97ff; --accent-2:#c4caff; --amber:#f2b560; --coral:#ef7a6d; --gray:#6b6b75;
  --serif:'Source Serif 4',Georgia,serif; --sans:'DM Sans',system-ui,sans-serif; --mono:ui-monospace,'SF Mono',Menlo,monospace;
  color-scheme:dark;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-snap-type:y proximity;scroll-padding-top:56px;background:var(--bg)}
body{margin:0;background:var(--bg);color:var(--ink);font:16px/1.6 var(--sans);-webkit-font-smoothing:antialiased;overflow-x:hidden}
.hero,.sec,.final{scroll-snap-align:center}
.hero.snap-tall,.sec.snap-tall,.final.snap-tall{scroll-snap-align:start}
a{color:inherit;text-decoration:none}
.wrap{width:min(1120px,calc(100% - 48px));margin:0 auto}
.sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}
.kicker{font:11px/1 var(--mono);letter-spacing:.16em;text-transform:uppercase;color:var(--accent);margin:0 0 20px}
h1,h2,h3{font-weight:400;margin:0;text-wrap:balance}
h2{font:400 clamp(32px,4.2vw,50px)/1.08 var(--serif);letter-spacing:-.02em}
.sub{color:var(--muted);font-size:17px;max-width:1000px;margin:16px 0 0}
#loop .sub,#kernels .sub{font-size:16px;max-width:none}
#models .sub{font-size:19px}

/* Scroll reveal (only once the script is running, so nothing stays hidden if it fails) */
.js .reveal{opacity:0;transform:translateY(16px);transition:opacity .8s cubic-bezier(.2,.7,.2,1) var(--d,0s),transform .8s cubic-bezier(.2,.7,.2,1) var(--d,0s)}
.js .reveal.in{opacity:1;transform:none}

/* Nav */
nav.top{position:fixed;inset:0 0 auto 0;z-index:30;display:flex;align-items:center;gap:28px;padding:16px 28px;border-bottom:1px solid transparent;transition:background .3s,border-color .3s}
nav.top.scrolled{background:rgba(9,9,11,.72);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);border-color:var(--line)}
.brand{font:400 22px/1 var(--serif);letter-spacing:-.02em}
.brand small{font-size:.6em;letter-spacing:0;color:var(--muted)}
.links{display:flex;gap:24px;margin-left:auto;font-size:14px;color:var(--muted)}
.links a{transition:color .2s}.links a:hover{color:var(--ink)}
.sponsors{display:flex;gap:6px}
.sponsors img{width:26px;height:26px;padding:3px;border-radius:7px;background:#ececef;image-rendering:pixelated;object-fit:contain}

/* Hero */
.hero{position:relative;min-height:100svh;display:grid;place-items:center;padding:110px 24px 90px;overflow:hidden;background:radial-gradient(90% 70% at 50% -10%,rgba(139,151,255,.10),transparent 60%),var(--bg)}
#gates{position:absolute;inset:0;width:100%;height:100%;display:block}
.hero::before{content:"";position:absolute;inset:0;z-index:1;pointer-events:none;background:radial-gradient(ellipse 36% 30% at 50% 50%,rgba(9,9,11,.8),rgba(9,9,11,.35) 60%,rgba(9,9,11,0) 85%)}
.hero-inner{position:relative;z-index:2;text-align:center;max-width:1000px}
.hero h1{font:400 clamp(40px,5.4vw,74px)/1.04 var(--serif);letter-spacing:-.03em;margin:0 0 22px}
.hero h1 em{font-style:normal;background:linear-gradient(100deg,var(--accent-2),var(--accent) 60%);-webkit-background-clip:text;background-clip:text;color:transparent}
.lede{font-size:clamp(16px,1.5vw,18px);color:var(--muted);max-width:520px;margin:0 auto 34px}

/* Repo form */
form.repo{width:min(580px,100%);margin:0 auto}
.field{display:flex;align-items:center;gap:10px;height:60px;padding:0 8px 0 18px;border:1px solid var(--line-2);border-radius:12px;background:rgba(17,17,20,.85);backdrop-filter:blur(6px);-webkit-backdrop-filter:blur(6px);transition:border-color .2s,box-shadow .2s}
.field:focus-within{border-color:#4a4f7a;box-shadow:0 0 0 4px rgba(139,151,255,.1)}
.field input{flex:1;min-width:0;border:0;outline:0;background:none;color:var(--ink);font:15px var(--sans);padding:8px 0}
.field input::placeholder{color:#6f6f78}
.field select{appearance:none;-webkit-appearance:none;border:1px solid var(--line);color:var(--muted);font:12px var(--mono);letter-spacing:.03em;border-radius:7px;padding:8px 26px 8px 10px;cursor:pointer;background:var(--bg) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='10' height='6'%3E%3Cpath d='M1 1l4 4 4-4' fill='none' stroke='%23a1a1aa' stroke-width='1.4'/%3E%3C/svg%3E") no-repeat right 10px center}
.field button{flex:none;width:44px;height:44px;border:0;border-radius:8px;background:var(--ink);color:#0b0b0d;font:22px/1 var(--sans);cursor:pointer;transition:transform .2s,background .2s,box-shadow .2s}
.field button:hover{background:#fff;transform:translateX(2px);box-shadow:0 0 22px rgba(139,151,255,.45)}
.note{min-height:20px;margin:12px 0 0;font-size:13px;color:var(--muted);text-align:center}
.cli-option{width:min(620px,100%);margin:10px auto 0;text-align:left;color:var(--muted);font-size:14px}
.cli-option summary{width:fit-content;margin:auto;cursor:pointer;color:var(--accent-2);text-underline-offset:3px}
.cli-option summary:hover,.cli-option a:hover{color:var(--ink)}
.cli-steps{margin-top:14px;padding:18px;border:1px solid var(--line-2);border-radius:12px;background:var(--bg-2)}
.cli-steps p{margin:0 0 12px}.cli-steps p:last-child{margin:12px 0 0}
.cli-steps pre{margin:0 0 16px;padding:12px;overflow-x:auto;border:1px solid var(--line);border-radius:8px;background:var(--bg);color:var(--ink);font:12px/1.6 var(--mono)}
.cli-steps code{font-family:var(--mono)}.cli-steps a{color:var(--accent-2);text-decoration:underline;text-underline-offset:3px}

/* Sections */
.sec{position:relative;padding:140px 0 30px}
.sec-head{max-width:1100px;margin-bottom:40px}
.panel,.chart,.funnel{border:1px solid var(--line);border-radius:16px;background:linear-gradient(180deg,#121216,#0d0d10)}
.ghost{border:1px solid var(--line);background:none;color:var(--muted);font:14px var(--mono);border-radius:999px;width:34px;height:34px;cursor:pointer;transition:color .2s,border-color .2s,transform .4s}
.ghost:hover{color:var(--ink);border-color:var(--line-2);transform:rotate(-120deg)}

/* 01 — architecture chart */
.chart-bar{display:flex;justify-content:space-between;align-items:center;min-height:34px;font:12px var(--mono);color:var(--muted)}
.chart-bar b{color:var(--accent-2);font-weight:400}
#arch-svg{display:block;width:100%;height:auto;overflow:visible}
svg text{font-family:var(--mono)}
.axis text{fill:var(--faint);font-size:11px}
.axis line{stroke:var(--line)}
.axis .title{fill:var(--muted);font-size:11px}
.col-label{opacity:.35;transition:opacity .4s}
.col-label.on{opacity:1}
.col-label .t{fill:var(--ink);font:13px var(--sans)}
.col-label .s{fill:var(--faint);font-size:10.5px}
.crash-lane text{fill:#7d4b45;font-size:10.5px;letter-spacing:.12em;text-transform:uppercase}
.edge{fill:none;stroke:#34343c;stroke-width:1.1;transition:stroke .5s,stroke-width .5s}
.edge.crash{stroke:#5a302b;stroke-dasharray:3 4}
.edge.win{stroke:var(--accent);stroke-width:2.4}
.edge.lead{stroke:var(--amber);stroke-width:1.8}
.node{transform-box:fill-box;transform-origin:center;transform:scale(0);transition:transform .45s cubic-bezier(.3,1.7,.5,1);cursor:pointer;outline:none}
.node.on{transform:scale(1)}
.node circle.dot{fill:var(--bg);stroke:#b9b9c2;stroke-width:1.4;transition:fill .5s,stroke .5s}
.node.base circle.dot{stroke:var(--ink);fill:var(--bg-2)}
.node.win circle.dot{fill:var(--accent);stroke:var(--accent-2);filter:drop-shadow(0 0 6px rgba(139,151,255,.8))}
.node.lead circle.dot{stroke:var(--amber);fill:#2a2214}
.node.crash line{stroke:var(--coral);stroke-width:2;stroke-linecap:round}
.node.crash:focus-visible line{stroke:#fff;stroke-width:4;filter:drop-shadow(0 0 5px var(--coral))}
.node .hit{fill:transparent}
.node:hover circle.dot,.node:focus-visible circle.dot{stroke-width:3}
.tag{opacity:0;transition:opacity .6s}
.tag.on{opacity:1}
.tag text{font-size:11.5px;fill:var(--accent-2)}
.tag.lead text{fill:var(--amber)}
.traveler{fill:#fff;filter:drop-shadow(0 0 7px rgba(139,151,255,1))}


/* 02 — kernel funnel */
.funnel{padding:28px 18px 14px}
.stages{list-style:none;margin:0;padding:0;display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:10px}
.stages li{text-align:center}
.stages b{display:inline-block;font:400 46px/1 var(--serif);letter-spacing:-.02em;font-weight:400}
.stages li:last-child b{color:var(--accent)}
.stages .l{display:block;font:11px var(--mono);letter-spacing:.12em;text-transform:uppercase;color:var(--muted);margin-top:12px}
#funnel-svg{display:block;width:100%;height:auto;margin-top:4px}
#funnel-svg .gate{stroke:var(--line-2);stroke-dasharray:2 5}
#funnel-svg circle.glow{filter:drop-shadow(0 0 6px rgba(139,151,255,.95))}
.funnel-foot{display:flex;justify-content:space-between;align-items:center;gap:16px;flex-wrap:wrap;margin-top:4px;padding:0 6px}
.legend{display:flex;flex-wrap:wrap;gap:18px;font:11px var(--mono);color:var(--muted)}
.legend i{display:inline-block;width:8px;height:8px;border-radius:50%;margin-right:7px}
.cheat{display:flex;gap:14px;align-items:center;margin:20px 0 0;color:var(--muted);font-size:14.5px}
.cheat svg{flex:none;width:20px;height:24px;color:var(--accent)}

/* 03 — stack */
.cards{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;perspective:900px}
.card{border:1px solid var(--line);border-radius:16px;padding:26px;background:var(--bg-2);transform-style:preserve-3d;will-change:transform}
.js .card.reveal{transition:opacity .8s cubic-bezier(.2,.7,.2,1) var(--d,0s),transform .3s ease-out,border-color .3s}
.card:hover{border-color:var(--line-2)}
.card-head{display:flex;align-items:center;justify-content:space-between;gap:16px;margin-bottom:14px}
.card img{display:block;width:64px;height:64px;flex:none;image-rendering:pixelated;object-fit:contain;animation:float 5s ease-in-out infinite;transform:translateZ(30px)}
.card:nth-child(2) img{animation-delay:-1.7s}
.glyph-lg{display:grid;place-items:center;width:64px;height:64px;flex:none;border-radius:14px;border:1px solid var(--line-2);font:24px var(--mono);color:var(--accent)}
.glyph-lg img{width:32px;height:32px;filter:invert(1);animation:none;transform:none}
.card h3{font:400 24px/1.2 var(--serif);margin:0}
.card p{margin:0;color:var(--muted);font-size:16.5px;line-height:1.5}
@keyframes float{0%,100%{translate:0 0}50%{translate:0 -5px}}

/* Final */
.final{position:relative;padding:90px 0 120px;text-align:center;background:radial-gradient(55% 60% at 50% 38%,rgba(139,151,255,.08),transparent 70%)}
.final h2{margin-bottom:34px}
.foot{border-top:1px solid var(--line);padding:26px 0;color:var(--faint);font-size:13px}
.foot .wrap{display:flex;justify-content:space-between;align-items:center;gap:20px;flex-wrap:wrap}
.foot .brand{font-size:18px;color:var(--muted)}
.foot img{width:18px;height:18px;vertical-align:-4px;margin-right:8px;image-rendering:pixelated;border-radius:4px;background:#ececef;padding:2px}
.foot a{transition:color .2s}.foot a:hover{color:var(--ink)}

/* Tooltip */
#tip{position:fixed;z-index:50;max-width:330px;pointer-events:none;background:#0c0c0f;border:1px solid #2c2c34;border-radius:10px;padding:11px 13px;font-size:12.5px;line-height:1.5;color:var(--ink);box-shadow:0 12px 40px rgba(0,0,0,.5)}
#tip .h{font:10.5px var(--mono);letter-spacing:.08em;text-transform:uppercase;color:var(--accent);margin-bottom:5px}
#tip .r{margin-top:7px;font:12px var(--mono);color:var(--accent-2)}
#tip .r.bad{color:#f0a298}

a:focus-visible,button:focus-visible,select:focus-visible{outline:2px solid var(--accent);outline-offset:3px}

@media(max-width:900px){
  .links{display:none}
  .sponsors{margin-left:auto}
  .cards{grid-template-columns:1fr}
  .stages b{font-size:30px}
  .sec{padding-top:110px}
}
@media(max-width:700px){
  .chart{overflow-x:auto}
  #arch-svg{min-width:680px}
}
@media(max-width:560px){
  nav.top{padding:14px 16px}
  .wrap{width:calc(100% - 32px)}
  .field{gap:5px;padding-left:10px}
  .field select{max-width:96px;padding:7px 18px 7px 6px;font-size:11px}
  .stages .l{font-size:9px;letter-spacing:.06em}
}
@media(prefers-reduced-motion:reduce){
  .js .reveal{opacity:1;transform:none;transition:none}
  .node{transform:none;transition:none}
  .card img{animation:none}
  html{scroll-behavior:auto;scroll-snap-type:none}
}

/* ================= v3 additions ================= */
.panel{padding:22px}
.panel h3{font:11px var(--mono);letter-spacing:.12em;text-transform:uppercase;color:var(--muted);margin:0 0 18px}

/* Hero results */
.results{display:flex;justify-content:center;align-items:center;gap:30px;margin-top:30px}
.results div{display:flex;flex-direction:column;align-items:center;gap:6px}
.results b{font:400 28px/1 var(--serif);font-variant-numeric:tabular-nums;font-weight:400}
.results span{font:11px var(--mono);color:var(--faint);letter-spacing:.03em}
.results i{width:1px;height:34px;background:var(--line-2)}

/* 01 — real agent timeline */
.tl{margin:0;padding:14px 18px 10px}
.tl-bar{display:flex;align-items:center;justify-content:space-between;gap:14px;flex-wrap:wrap;min-height:36px;margin-bottom:6px;font:12px var(--mono);color:var(--muted)}
.tabs{display:flex;gap:6px}
.tabs button{border:1px solid var(--line);background:none;color:var(--muted);font:12px var(--mono);border-radius:999px;padding:5px 12px;cursor:pointer;transition:color .2s,background .2s,border-color .2s}
.tabs button:hover{color:var(--ink)}
.tabs button.on{color:#0b0b0d;background:var(--ink);border-color:var(--ink)}
.tl-meta{display:flex;gap:18px;flex-wrap:wrap}
.tl-meta b{color:var(--ink);font-weight:400;font-variant-numeric:tabular-nums}
#tl-svg{display:block;width:100%;height:auto;overflow:visible}
#tl-svg .lab{fill:var(--muted);font-size:11px}
#tl-svg .grid{stroke:var(--line)}
#tl-svg .tick{fill:var(--faint);font-size:10.5px}
#tl-svg .b-plan{fill:var(--accent-2)}
#tl-svg .b-agent{fill:#45454f;cursor:pointer;transition:fill .2s}
#tl-svg .b-agent:hover{fill:#6a6a76}
#tl-svg .b-cur{fill:var(--amber)}
#tl-svg .o-ok{fill:#d4d4da}
#tl-svg .o-best{fill:var(--accent);filter:drop-shadow(0 0 5px rgba(139,151,255,.9))}
#tl-svg .o-crash{fill:var(--coral);font:700 13px var(--mono)}
#tl-svg .o-lab{fill:var(--accent-2);font-size:11px}
#tl-svg .playhead{stroke:#fff;stroke-width:1;opacity:.55}

/* 02 — the recipe that won */
.recipe{margin-top:22px}
.steps{position:relative;display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:20px}
.steps::before{content:"";position:absolute;left:6px;right:6px;top:6px;height:1px;background:var(--line-2)}
.glide{position:absolute;top:3px;left:0;width:7px;height:7px;border-radius:50%;background:#fff;box-shadow:0 0 12px 2px rgba(139,151,255,.9);animation:glide 5.5s cubic-bezier(.45,0,.55,1) infinite;z-index:1}
@keyframes glide{0%{left:0;opacity:0}8%,90%{opacity:1}100%{left:calc(100% - 7px);opacity:0}}
.step{position:relative;padding-top:26px}
.step::before{content:"";position:absolute;left:0;top:0;width:13px;height:13px;border-radius:50%;border:1.5px solid var(--accent);background:var(--bg-2);transition:background .25s ease,box-shadow .25s ease}
.step.lit::before{background:var(--accent);box-shadow:0 0 14px rgba(139,151,255,.85)}
.step .g{font:11px var(--mono);color:var(--faint)}
.step h4{font:400 19px/1.25 var(--serif);margin:6px 0 8px;font-weight:400}
.step .v{font:12px var(--mono);color:var(--accent-2)}

/* 03 — the four checks */
.checks{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:16px;margin-top:22px}
.check{border:1px solid var(--line);border-radius:14px;padding:18px;background:var(--bg-2)}
.check canvas{display:block;width:100%;height:64px;margin-bottom:16px}
.check .n{font:11px var(--mono);color:var(--faint)}
.check h4{font:400 20px/1.2 var(--serif);margin:4px 0 6px;font-weight:400}
.check p{margin:0;font-size:13.5px;color:var(--muted);line-height:1.5}

.lineage ol{list-style:none;margin:0;padding:0}
.lineage li{position:relative;padding:0 0 16px 28px}
.lineage li::before{content:"";position:absolute;left:4px;top:7px;width:10px;height:10px;border-radius:50%;border:1.6px solid var(--accent);background:var(--bg-2)}
.lineage li::after{content:"";position:absolute;left:9px;top:21px;bottom:0;width:1px;background:var(--line-2)}
.lineage li:last-child{padding-bottom:0}
.lineage li:last-child::after{display:none}
.lineage li.best::before{background:var(--accent);border-color:var(--accent-2);box-shadow:0 0 12px rgba(139,151,255,.75)}
.lineage .ms{font:400 21px/1.1 var(--serif)}
.lineage .id{font:11px var(--mono);color:var(--faint);margin-left:10px}
.lineage .dx{font:11.5px var(--mono);color:var(--accent-2);margin-left:10px}
.lineage p{margin:4px 0 0;font-size:13px;color:var(--muted)}
.chips{display:flex;flex-wrap:wrap;gap:8px;margin-top:20px}
.chips code{font:12px var(--mono);color:var(--accent-2);background:rgba(139,151,255,.08);border:1px solid rgba(139,151,255,.22);border-radius:6px;padding:4px 8px}
.fine{margin:12px 0 0;font-size:12.5px;color:var(--faint)}
#blocks-svg{display:block;width:100%;height:auto;overflow:visible}
#blocks-svg .row text{fill:var(--faint);font-size:11px}
#blocks-svg .stem{stroke:var(--line-2);stroke-width:1.5;transform-box:fill-box;transform-origin:left center;transform:scaleX(0);transition:transform 1s cubic-bezier(.2,.8,.2,1) var(--d,0s)}
#blocks-svg .pt{fill:var(--accent);opacity:0;transition:opacity .4s calc(var(--d,0s) + .8s)}
#blocks-svg.on .stem{transform:scaleX(1)}
#blocks-svg.on .pt{opacity:1}
#blocks-svg .med{stroke:var(--accent);stroke-width:1.5}
#blocks-svg .thr{stroke:var(--amber);stroke-dasharray:3 4;opacity:.8}
#blocks-svg .lab{font-size:10.5px}
#blocks-svg .lab.m{fill:var(--accent-2)}
#blocks-svg .lab.t{fill:var(--amber)}
#blocks-svg .axis-t{fill:var(--faint);font-size:10.5px}
#blocks-cap{margin:14px 0 0;font-size:13.5px;color:var(--muted)}
#blocks-cap b{color:var(--accent-2);font-weight:500}

/* 04 — model carousel (3D, billboarded tiles) */
.carousel{position:relative;height:340px;perspective:1000px;margin-top:6px;overflow:hidden}
.carousel::after{content:"";position:absolute;left:50%;bottom:34px;width:min(760px,80%);height:60px;transform:translateX(-50%);background:radial-gradient(ellipse at center,rgba(139,151,255,.16),transparent 70%);pointer-events:none}
.tile{position:absolute;left:50%;top:48%;width:190px;height:204px;border:1px solid var(--line-2);border-radius:18px;background:linear-gradient(180deg,#17171c,#0f0f12);display:flex;flex-direction:column;align-items:center;justify-content:center;gap:9px;text-align:center;padding:16px;will-change:transform,opacity;box-shadow:0 20px 50px rgba(0,0,0,.45)}
.tile img{width:104px;height:104px;margin:-14px 0 -12px;image-rendering:pixelated;object-fit:contain}
.tile .mono{display:grid;place-items:center;width:76px;height:76px;border-radius:18px;border:1px solid var(--line-2);font:600 22px var(--mono);color:var(--accent-2);background:radial-gradient(circle at 50% 30%,rgba(139,151,255,.18),transparent 70%)}
.tile b{font:400 19px var(--serif);font-weight:400}
.tile span{font:11px/1.4 var(--mono);color:var(--faint)}

@media(max-width:900px){
  .checks{grid-template-columns:repeat(2,minmax(0,1fr))}
  .steps{grid-template-columns:repeat(2,minmax(0,1fr))}
  .steps::before,.glide{display:none}
  .step.last::before{background:var(--accent);box-shadow:0 0 14px rgba(139,151,255,.85)}
}
@media(max-width:700px){
  .tl{overflow-x:auto}
  #tl-svg{min-width:680px}
}
@media(max-width:560px){
  .checks{grid-template-columns:1fr}
  .results{gap:18px}
  .results b{font-size:24px}
  .carousel{height:300px}
  .tile{width:160px;height:180px}
}
@media(prefers-reduced-motion:reduce){
  .glide{animation:none;display:none}
  .step.last::before{background:var(--accent);box-shadow:0 0 14px rgba(139,151,255,.85)}
  #blocks-svg .stem{transform:none;transition:none}
  #blocks-svg .pt{opacity:1;transition:none}
}

/* ================= v4: tabs, raw-loss chart, repo web ================= */
/* Tabbed panels: one view at first glance, the rest a click away */
.tabbed{padding:0;overflow:hidden}
.tabbar{display:flex;gap:2px;padding:0 12px;border-bottom:1px solid var(--line);overflow-x:auto;scrollbar-width:none}
.tabbar::-webkit-scrollbar{display:none}
.tabbar button{position:relative;flex:none;border:0;background:none;color:var(--faint);font:13px var(--sans);padding:15px 12px 14px;cursor:pointer;transition:color .2s}
.tabbar button:hover{color:var(--muted)}
.tabbar button.on{color:var(--ink)}
.tabbar button::after{content:"";position:absolute;left:12px;right:12px;bottom:-1px;height:2px;border-radius:2px;background:var(--accent);transform:scaleX(0);transition:transform .25s ease}
.tabbar button.on::after{transform:scaleX(1)}
.pane{padding:14px 18px 18px;animation:pane-in .35s ease}
@keyframes pane-in{from{opacity:0;transform:translateY(4px)}}
.tabbed .pane.funnel{border:0;border-radius:0;background:none;padding:26px 18px 14px}
.pane.lineage,.pane.blocks{padding:26px 26px 24px}
.pane.blocks #blocks-svg{max-width:640px}
.pane-note{margin:6px 0 16px;color:var(--muted);font-size:14px}
.crashes{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:8px}
.crashes li{display:flex;gap:16px;align-items:baseline;padding:10px 12px;border:1px solid rgba(239,122,109,.14);background:rgba(239,122,109,.05);border-radius:10px;cursor:default}
.crashes .g{flex:none;min-width:92px;font:11px var(--mono);color:var(--faint)}
.crashes code{min-height:1.5em;font:12.5px/1.5 var(--mono);color:#eba399;overflow-wrap:anywhere}

/* Raw-loss chart: the baseline at each training budget, as a staircase */
.stair-line{fill:none;stroke:var(--muted);stroke-width:1.2;stroke-dasharray:5 5;opacity:.55}
.stair-lab{fill:var(--muted);font-size:10.5px}

/* Repos web */
.sec-head.center{text-align:center;margin:0 auto 8px}
.sec-head.center .sub{max-width:600px;margin-left:auto;margin-right:auto}
#web-canvas{position:absolute;inset:0;display:block;width:100%;height:100%}
#web-nodes{position:absolute;inset:0}
.rnode{position:absolute;left:0;top:0;display:flex;flex-direction:column;align-items:center;gap:7px;padding:6px;border:0;background:none;color:var(--muted);font:12px var(--mono);cursor:pointer;will-change:transform,opacity}
.rnode i{width:11px;height:11px;border-radius:50%;border:1.4px solid #6f6f7a;background:var(--bg);transition:border-color .2s}
.rnode span{white-space:nowrap;transition:color .2s}
.rnode:hover span,.rnode:focus-visible span{color:var(--ink)}
.rnode:hover i{border-color:var(--ink)}
.rnode.run{color:var(--ink)}
.rnode.run i{width:15px;height:15px;border:0;background:var(--accent);box-shadow:0 0 0 4px rgba(139,151,255,.14),0 0 18px rgba(139,151,255,.7)}
.hub{position:absolute;left:50%;top:50%;z-index:300;display:grid;place-items:center;width:132px;height:132px;transform:translate(-50%,-50%);border:1px solid rgba(196,202,255,.45);border-radius:50%;background:radial-gradient(circle at 50% 35%,#20234a,#101126);color:var(--ink);font:400 19px var(--serif);cursor:pointer;box-shadow:0 0 0 10px rgba(139,151,255,.05),0 0 60px rgba(139,151,255,.25);transition:border-color .2s}
.hub:hover{border-color:var(--accent-2)}
.hub span{position:relative;z-index:1;white-space:nowrap}
.hub i{position:absolute;inset:0;border-radius:50%;background:#15172e;opacity:0;transform:scale(1);transition:transform .65s cubic-bezier(.6,0,.3,1),opacity .3s}
.hub::after{content:"";position:absolute;inset:-10px;border-radius:50%;border:1px solid rgba(139,151,255,.35);animation:hub-pulse 2.8s ease-out infinite;pointer-events:none}
@keyframes hub-pulse{0%{transform:scale(.9);opacity:.8}100%{transform:scale(1.5);opacity:0}}
.web.expanding .hub i{opacity:1;transform:scale(18)}
.web.expanding .rnode{opacity:0!important;transition:opacity .3s}

@media(max-width:700px){
  .pane[data-pane="cands"]{overflow-x:auto}
  .crashes li{flex-direction:column;gap:4px}
}
@media(prefers-reduced-motion:reduce){
  .pane{animation:none}
  .hub::after{animation:none}
}
/* ================= v5: the repo web as the closing showpiece ================= */
#repos.final{padding:120px 0 40px;background:radial-gradient(60% 55% at 50% 58%,rgba(139,151,255,.08),transparent 72%)}
.web{position:relative;height:auto;min-height:0;overflow:visible}
.web-stage{position:relative;z-index:0;height:clamp(820px,100vh,960px);overflow:hidden}
.web-head{position:absolute;left:0;right:0;top:28px;z-index:2;padding:0 24px;text-align:center;pointer-events:none}
.web-head h2{font-size:clamp(34px,4.6vw,56px)}
.web-head .sub{max-width:640px;margin:14px auto 0}
.rnode.run{gap:6px;font-size:13px}
.rnode.run i{width:18px;height:18px}
.rnode .chip{display:block;margin-top:-2px;font:11px var(--mono);font-style:normal;color:var(--accent-2);white-space:nowrap}
.rnode.sel i{box-shadow:0 0 0 7px rgba(139,151,255,.22),0 0 32px rgba(139,151,255,1)}
.rnode.sel span{color:#fff}
.run-card{position:absolute;z-index:3;left:max(24px,calc(50% - 560px));bottom:86px;width:min(380px,calc(100% - 48px));padding:20px 22px 16px;border:1px solid var(--line-2);border-radius:16px;background:rgba(13,13,16,.8);backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px);box-shadow:0 24px 60px rgba(0,0,0,.45);text-align:left}
.run-card .body{animation:pane-in .4s ease}
.run-card .k{font:11px var(--mono);letter-spacing:.08em;text-transform:uppercase;color:var(--faint)}
.run-card h3{font:400 22px/1.2 var(--serif);margin:6px 0 10px;overflow-wrap:anywhere}
.run-card .big{font:400 42px/1 var(--serif);color:var(--accent-2);letter-spacing:-.02em}
.run-card .big small{margin-left:10px;font:12px var(--mono);letter-spacing:0;color:var(--muted)}
.run-card .run-metric{padding:12px 0;border-top:1px solid var(--line-2)}
.run-card .run-metric .big{font-size:34px}
.run-card .search-detail{font-size:12px;color:var(--faint)}
.run-card p{margin:10px 0 0;font-size:13.5px;line-height:1.5;color:var(--muted)}
.run-card .act{display:flex;justify-content:space-between;align-items:center;gap:12px;margin-top:16px}
.run-card .go{display:inline-flex;text-decoration:none;border:1px solid var(--line-2);background:none;color:var(--ink);font:12.5px var(--sans);border-radius:999px;padding:7px 14px;cursor:pointer;transition:border-color .2s,background .2s}
.run-card .go:hover{border-color:var(--accent);background:rgba(139,151,255,.08)}
.pager{display:flex;gap:7px}
.pager button{width:8px;height:8px;padding:0;border:0;border-radius:50%;background:#3a3a44;cursor:pointer;transition:background .2s,transform .2s}
.pager button.on{background:var(--accent);transform:scale(1.25)}
.web-evidence{position:absolute;z-index:3;left:24px;right:24px;bottom:12px;max-width:800px;margin:auto;text-align:center;font:12px/1.55 var(--sans);color:var(--muted)}
.web-evidence a{color:var(--accent-2);text-decoration:underline;text-underline-offset:3px}

@media(max-width:700px){
  #repos.final{padding:90px 0 30px}
  .web-head{position:static;padding:0 16px 6px}
  .web-stage{height:400px}
  .hub{width:84px;height:84px;font-size:14px}
  .rnode.run{font-size:11px}
  .run-card{position:static;width:auto;margin:6px 16px 0}
  .web-evidence{position:static;margin:18px 16px 0}
}
@media(max-width:560px){
  .hub{width:74px;height:74px;font-size:13px}
  .rnode.run{font-size:10.5px}
  .rnode .chip{display:none}
}
/* Terminal-first entry and unobstructed project orbits. */
.hero-inner{width:min(100%,900px)}
.hero h1{font-size:clamp(38px,5.2vw,68px);margin-bottom:32px}
.hero-console{width:min(620px,100%);margin:auto;text-align:left;border:1px solid var(--line-2);border-radius:14px;background:rgba(13,13,17,.96);overflow:hidden;box-shadow:0 20px 70px #0005}
.hero-console[hidden],#hero-form[hidden]{display:none}
.console-bar{display:flex;align-items:center;justify-content:space-between;padding:12px 16px;border-bottom:1px solid var(--line);color:var(--muted);font:12px var(--mono)}
.console-bar>span:first-child{display:flex;gap:6px}.console-bar i{width:7px;height:7px;border-radius:50%;background:#45454e}
.console-bar button{background:none;border:0;color:var(--accent-2);font:inherit;cursor:pointer;padding:4px}
.hero-console pre{padding:22px;margin:0;overflow:auto;font:13px/1.8 var(--mono);color:var(--accent-2)}
.console-help{display:block;padding:0 22px 18px;color:var(--muted);font-size:12px}
.magnet-toggle{margin:20px auto 0;padding:11px 22px;border:1px solid var(--line-2);border-radius:999px;background:var(--ink);color:var(--bg);font:14px var(--sans);cursor:pointer;transition:transform .15s,box-shadow .2s}
.magnet-toggle:hover{box-shadow:0 0 28px #8b97ff30}
.web{max-width:1000px;margin:auto}.web-head{position:static;padding:0 24px 20px}
.web-stage{height:500px;overflow:visible;margin:0 24px}
.run-card{position:static;width:auto;max-width:760px;margin:20px auto 0;background:var(--bg-2);box-shadow:none}
.run-card .body{display:grid;grid-template-columns:1fr 1fr;gap:0 24px}.run-card .k,.run-card h3{grid-column:1/-1}
.run-card.community .body{display:block}
.run-card .run-metric:only-of-type{grid-column:1/-1}
.run-card .big small{display:block;margin:8px 0 0}.web-evidence{position:static;margin:20px 24px 0}
.rnode.run{padding:10px;gap:10px;font-size:13px}.rnode.run i{width:30px;height:30px;background:radial-gradient(circle at 30% 25%,#d5d9ff,#8b97ff 40%,#383d78);box-shadow:0 0 25px #8b97ff35}
.rnode.sel i{box-shadow:0 0 0 5px #8b97ff22,0 0 30px #8b97ff80}
.rnode span{background:var(--bg);border-radius:5px;padding:2px 5px}.hub{width:104px;height:104px;font-size:17px}
@media(max-width:700px){.web-stage{height:430px;margin:0 8px}.run-card{margin:18px 16px 0}.run-card .body{display:block}.rnode.run{font-size:12px}.hub{width:76px;height:76px;font-size:14px}.hero-console pre{font-size:12px;padding:16px}.hero{padding-left:18px;padding-right:18px}.results{gap:18px}}

@media(max-width:600px){
  .hero{grid-template-columns:minmax(0,1fr);min-height:100svh;padding:100px 16px 72px}
  .hero-inner{min-width:0;max-width:100%}
  .hero h1{font-size:clamp(35px,10vw,48px);line-height:1.08;margin-bottom:28px}
  .hero-console{max-width:100%;min-width:0}
  .hero-console pre{max-width:100%;white-space:pre-wrap;overflow-wrap:anywhere;font-size:11px;line-height:1.7}
  .console-bar{font-size:11px}
  .results{display:grid;grid-template-columns:minmax(0,1fr) 1px minmax(0,1fr);gap:12px;max-width:100%}
  .results div{min-width:0}
  .results span{font-size:10px;line-height:1.35}
  .results i{height:36px}
  .sec{padding-top:72px}
  .sec-head{margin-bottom:24px}
  .sub{font-size:15px}
  #loop .sub,#kernels .sub,#models .sub{font-size:15px}
  .panel{padding:16px}
  .tl{padding:14px 12px 10px}
  .tl-meta{font-size:10px;gap:10px}
  .stages{gap:4px}
  .stages b{font-size:27px}
  .stages .l{font-size:8px;letter-spacing:0;overflow-wrap:anywhere}
  .tabbar{padding:0 6px}
  .tabbar button{flex:none;min-height:44px}
  .pane{padding:14px 12px 18px}
  .field input,.field select{font-size:16px}
  .field{height:auto;display:grid;grid-template-columns:minmax(0,1fr) 44px;gap:8px;padding:8px}
  .field input{grid-column:1/-1;width:100%;padding:9px 6px}
  .field select{grid-column:1;max-width:none;width:100%;height:44px;padding-left:12px}
  .field button{grid-column:2;width:44px;height:44px}
}