/* TraceHarness auth. Tokens copied from tools/site.css (HarnessLab rig, light and dark). */
:root{
  color-scheme: light;
  --bg:#fafafa; --bg2:#f3f3f3; --panel:#ffffff; --panel2:#f5f5f5; --panel3:#ededed;
  --line:#e8e8e8; --line2:#dadada; --line3:#a8a8a8;
  --text:#171717; --dim:#4d4d4d; --mute:#666666;
  --acc:#0062e6; --acc-t:#005bc0; --acc-soft:#e8f0fd; --on-acc:#ffffff;
  --ok:#2da44e; --ok-t:#156b2d; --ok-soft:#e3f3e8; --bad:#da2f35; --bad-t:#c0262c; --bad-soft:#fbe7e8;
  --amb:#f5a524; --amb-t:#915100; --amb-soft:#fdf1dc;
  --ser1:#233c78; --ser2:#4e67a3; --ser3:#9aaed6; --ser4:#4d525b; --ser5:#8a8f98; --ser6:#c3c7cd;
  --btn:#171717; --btn-t:#ffffff; --btn-h:#333333;
  --shadow:0 1px 2px rgba(0,0,0,.04),0 8px 24px -8px rgba(0,0,0,.10);
  --dot:rgba(0,0,0,.075);
  --sans:"IBM Plex Sans", ui-sans-serif, system-ui, -apple-system, "Segoe UI", sans-serif;
  --mono:"IBM Plex Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  --gut:clamp(16px,4vw,72px);
}
@media (prefers-color-scheme: dark){
  :root:not([data-theme="light"]){
    color-scheme: dark;
    --bg:#000000; --bg2:#070707; --panel:#0a0a0a; --panel2:#111111; --panel3:#1a1a1a;
    --line:#1c1c1c; --line2:#2a2a2a; --line3:#454545;
    --text:#ededed; --dim:#a1a1a1; --mute:#8f8f8f;
    --acc:#0062e6; --acc-t:#52a8ff; --acc-soft:#0b1d3a; --on-acc:#ffffff;
    --ok:#2ea043; --ok-t:#3fb950; --ok-soft:#0f2416; --bad:#e5484d; --bad-t:#ff6166; --bad-soft:#2a0f10;
    --amb:#f5a524; --amb-t:#ffb224; --amb-soft:#2a1d05;
    --ser1:#a3b3d6; --ser2:#6d83b6; --ser3:#4a5f8f; --ser4:#9aa0a9; --ser5:#6b717a; --ser6:#464b53;
    --btn:#ededed; --btn-t:#000000; --btn-h:#ffffff;
    --shadow:0 1px 0 rgba(255,255,255,.03) inset,0 8px 24px -8px rgba(0,0,0,.6);
    --dot:rgba(255,255,255,.07);
  }
}
:root[data-theme="dark"]{
  color-scheme: dark;
  --bg:#000000; --bg2:#070707; --panel:#0a0a0a; --panel2:#111111; --panel3:#1a1a1a;
  --line:#1c1c1c; --line2:#2a2a2a; --line3:#454545;
  --text:#ededed; --dim:#a1a1a1; --mute:#8f8f8f;
  --acc:#0062e6; --acc-t:#52a8ff; --acc-soft:#0b1d3a; --on-acc:#ffffff;
  --ok:#2ea043; --ok-t:#3fb950; --ok-soft:#0f2416; --bad:#e5484d; --bad-t:#ff6166; --bad-soft:#2a0f10;
  --amb:#f5a524; --amb-t:#ffb224; --amb-soft:#2a1d05;
  --ser1:#a3b3d6; --ser2:#6d83b6; --ser3:#4a5f8f; --ser4:#9aa0a9; --ser5:#6b717a; --ser6:#464b53;
  --btn:#ededed; --btn-t:#000000; --btn-h:#ffffff;
  --shadow:0 1px 0 rgba(255,255,255,.03) inset,0 8px 24px -8px rgba(0,0,0,.6);
  --dot:rgba(255,255,255,.07);
}

*,*::before,*::after{box-sizing:border-box}
[hidden]{display:none !important}
html{-webkit-text-size-adjust:100%}
body{margin:0;min-height:100dvh;display:flex;flex-direction:column;background:var(--bg);color:var(--text);
  font:400 16px/1.6 var(--sans);font-feature-settings:"kern","liga";-webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;overflow-x:hidden}
a{color:inherit;text-decoration-thickness:1px;text-underline-offset:3px;text-decoration-color:var(--line3)}
a:hover{text-decoration-color:currentColor}
h1{font-weight:500;letter-spacing:-.032em;text-wrap:balance;margin:0}
p{margin:0}
:focus-visible{outline:2px solid var(--acc);outline-offset:3px;border-radius:4px}
.wrap{margin:0 auto;padding-inline:var(--gut)}

/* ---------- header ---------- */
.top{position:sticky;top:env(safe-area-inset-top,0px);z-index:20;background:color-mix(in srgb,var(--bg) 82%,transparent);
  backdrop-filter:saturate(1.4) blur(12px);-webkit-backdrop-filter:saturate(1.4) blur(12px);
  border-bottom:1px solid transparent;transition:border-color .2s}
.top.scrolled{border-bottom-color:var(--line)}
.top-in{display:flex;align-items:center;gap:32px;height:64px}
.brand{display:inline-flex;align-items:center;gap:10px;font-weight:600;font-size:16px;letter-spacing:-.015em;text-decoration:none;flex:none}
.mark .m1{fill:var(--line3)} .mark .m2{fill:var(--ser4)} .mark .m3{fill:var(--text)} .mark .m4{fill:var(--acc)}
.top-r{display:flex;align-items:center;gap:10px;margin-left:auto}
.icon-btn{display:inline-grid;place-items:center;width:34px;height:34px;border-radius:8px;border:1px solid var(--line2);
  background:transparent;color:var(--dim);cursor:pointer;transition:color .15s,border-color .15s;text-decoration:none}
.icon-btn:hover{color:var(--text);border-color:var(--line3)}
.icon-btn svg{width:16px;height:16px}
.theme .i-sun{display:none}
:root[data-theme="dark"] .theme .i-sun{display:block}
:root[data-theme="dark"] .theme .i-moon{display:none}
@media (prefers-color-scheme: dark){
  :root:not([data-theme="light"]) .theme .i-sun{display:block}
  :root:not([data-theme="light"]) .theme .i-moon{display:none}
}

/* ---------- buttons ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;height:44px;padding:0 20px;border-radius:9px;
  font:500 15px/1 var(--sans);text-decoration:none;background:var(--btn);color:var(--btn-t);border:1px solid var(--btn);
  transition:background .15s,border-color .15s,transform .15s;cursor:pointer;white-space:nowrap}
.btn:hover{background:var(--btn-h);border-color:var(--btn-h)}
.btn:active{transform:translateY(1px)}
.btn.acc{background:var(--acc);border-color:var(--acc);color:var(--on-acc)}
.btn.acc:hover{background:#0a6cf5;border-color:#0a6cf5}
.btn.ghost{background:transparent;color:var(--text);border-color:var(--line2)}
.btn.ghost:hover{border-color:var(--line3);background:var(--panel2)}
.btn.sm{height:34px;padding:0 14px;font-size:14px;border-radius:8px}
.btn:disabled{opacity:.6;cursor:not-allowed;transform:none}
.btn:disabled:hover{background:var(--btn);border-color:var(--btn)}
.btn.acc:disabled:hover{background:var(--acc);border-color:var(--acc)}
.btn.ghost:disabled:hover{background:transparent;border-color:var(--line2)}

/* ---------- type ---------- */
.eyebrow{display:inline-flex;align-items:center;gap:8px;font:500 12px/1 var(--mono);letter-spacing:.08em;text-transform:uppercase;color:var(--acc-t)}
.eyebrow::before{content:"";width:6px;height:6px;border-radius:1px;background:var(--acc)}
.lede{font-size:clamp(17px,1.5vw,19px);line-height:1.6;color:var(--dim);max-width:none}
.fine{font-size:13px;line-height:1.55;color:var(--mute)}
.hint{font:400 13px/1.45 var(--sans);color:var(--mute)}

/* ---------- gate ---------- */
.gate{flex:1;display:grid;align-items:center;position:relative;isolation:isolate;padding-block:48px 32px}
.gate::before{content:"";position:absolute;inset:0;z-index:-1;pointer-events:none;
  background-image:radial-gradient(var(--dot) 1px,transparent 1.2px);background-size:22px 22px;
  -webkit-mask-image:radial-gradient(ellipse 60% 70% at 50% 40%,#000 20%,transparent 75%);
  mask-image:radial-gradient(ellipse 60% 70% at 50% 40%,#000 20%,transparent 75%)}
.gate-in{display:grid;justify-items:center}
.card{width:min(480px,100%);display:grid;gap:22px;align-content:start;padding:28px;
  border:1px solid var(--line);border-radius:14px;background:var(--panel);box-shadow:var(--shadow)}
.intro{display:grid;gap:12px}
.card h1{font-size:clamp(32px,4vw,40px);line-height:1.08;letter-spacing:-.032em}
#anon,.session{display:grid;gap:16px}
form{display:grid;gap:16px}
.field{display:grid;gap:6px}
.field label{font:500 13px/1.35 var(--sans);color:var(--text)}
.field input,.field textarea{width:100%;appearance:none;-webkit-appearance:none;border:1px solid var(--line2);
  background:var(--bg);color:var(--text);border-radius:9px;font:400 16px/1.4 var(--sans);padding:0 12px;height:44px}
.field textarea{height:auto;min-height:128px;padding:12px;resize:vertical;line-height:1.55}
.field input:hover,.field textarea:hover{border-color:var(--line3)}
.field input:focus-visible,.field textarea:focus-visible{border-color:var(--acc)}
.field input:-webkit-autofill,.field input:-webkit-autofill:hover,.field input:-webkit-autofill:focus{
  -webkit-text-fill-color:var(--text);caret-color:var(--text);box-shadow:0 0 0 1000px var(--bg) inset}
form .btn{width:100%}
.err{padding:10px 12px;border-radius:8px;background:var(--bad-soft);color:var(--bad-t);
  border:1px solid color-mix(in srgb,var(--bad) 35%,transparent);font-size:14px;line-height:1.45}
.acts{display:flex;flex-wrap:wrap;gap:12px}
.acts .btn{flex:1 1 auto}
.who{overflow-wrap:anywhere}

.foot{margin-top:0;border-top:1px solid var(--line);padding:28px 0 calc(28px + env(safe-area-inset-bottom,0px))}
.foot-b{display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;font-size:13px;color:var(--mute)}
.foot a{color:var(--dim);text-decoration:none}
.foot a:hover{color:var(--text)}

@media (max-width:760px){
  .top-in{gap:12px}
  .gate{padding-block:32px 24px}
  .card{padding:22px 18px}
}
@media (max-width:480px){
  .top-cta{display:none}
}
@media (min-width:2200px){body{zoom:1.125}}
@media (min-width:2800px){body{zoom:1.25}}
@media (min-width:3400px){body{zoom:1.5}}
@media (min-width:4400px){body{zoom:1.75}}
@media (min-width:5000px){body{zoom:2}}
@media (prefers-reduced-motion: reduce){
  *{transition:none!important;animation:none!important}
}