:root{
  --bg:#F5F3ED; --surface:#FFFFFF; --ink:#1D1C18; --muted:#6F6D63;
  --line:#E4E1D5; --accent:#17795A; --accent-ink:#0F5940;
  --accent-soft:rgba(23,121,90,.10); --blue:#2E6CA8;
  --code-bg:#FBFAF5; --brick:rgba(29,28,24,.13); --brick-strong:rgba(29,28,24,.32);
}
[data-theme="midnight"]{
  --bg:#0C0F11; --surface:#15181B; --ink:#E9E7E0; --muted:#8E8D84;
  --line:#23272B; --accent:#3BC492; --accent-ink:#5CD6A9;
  --accent-soft:rgba(59,196,146,.12); --blue:#6BA5DC;
  --code-bg:#101316; --brick:rgba(233,231,224,.13); --brick-strong:rgba(233,231,224,.36);
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  background:var(--bg); color:var(--ink);
  font-family:"Instrument Sans",system-ui,sans-serif;
  font-size:17px; line-height:1.6;
  transition:background .35s ease, color .35s ease;
}
.wrap{max-width:880px;margin:0 auto;padding:0 24px}
header{display:flex;justify-content:space-between;align-items:center;padding:28px 0}
.wordmark{font-weight:600;font-size:17px;letter-spacing:-.01em}
.mode-toggle{
  font-family:"JetBrains Mono",monospace;font-size:12px;color:var(--muted);
  background:none;border:1px solid var(--line);border-radius:999px;
  padding:3px;display:flex;gap:2px;cursor:pointer;transition:border-color .2s;
}
.mode-toggle:hover{border-color:var(--muted)}
.mode-toggle span{opacity:.4;padding:4px 11px;border-radius:999px;transition:opacity .3s,background .3s}
.mode-toggle span.on{opacity:1;background:var(--line);color:var(--ink)}
.surplus-line{stroke-dasharray:5 9;animation:dashflow 2s linear infinite}
@keyframes dashflow{to{stroke-dashoffset:-28}}
.hero{padding:88px 0 40px}
.eyebrow{
  font-family:"JetBrains Mono",monospace;font-size:12px;letter-spacing:.14em;
  text-transform:uppercase;color:var(--accent);margin-bottom:20px;
}
h1{font-size:clamp(1.6rem,6.4vw,3.5rem);font-weight:600;letter-spacing:-.025em;line-height:1.08;max-width:28ch;text-wrap:balance}
.subhead{font-size:clamp(1.05rem,4vw,1.3rem);color:var(--muted);margin-top:22px;max-width:40ch}
.subhead strong{color:var(--ink);font-weight:500}
.hero-cta{margin-top:36px;display:flex;flex-wrap:wrap;gap:16px 24px;align-items:center}
.btn{
  display:inline-block;background:var(--ink);color:var(--bg);
  font-size:15px;font-weight:500;text-decoration:none;
  padding:12px 24px;border-radius:8px;border:none;cursor:pointer;
  transition:opacity .2s;
}
.btn:hover{opacity:.85}
.btn:disabled{opacity:.6;cursor:default}
.textlink{color:var(--muted);font-size:15px;text-decoration:none;border-bottom:1px solid var(--line);transition:color .2s}
.textlink:hover{color:var(--ink)}
.card{
  background:var(--surface);border:1px solid var(--line);border-radius:14px;
  transition:background .35s ease,border-color .35s ease;
}
.api-card{margin:56px 0 0;padding:8px 0 0;overflow:hidden}
.api-card-head{
  display:flex;justify-content:space-between;align-items:center;
  padding:8px 22px 14px;border-bottom:1px solid var(--line);
}
.api-card-head span{font-family:"JetBrains Mono",monospace;font-size:12px;color:var(--muted)}
.api-card-tag{white-space:nowrap;opacity:.6}
pre{
  font-family:"JetBrains Mono",monospace;font-size:13.5px;line-height:1.75;
  padding:20px 22px 24px;background:var(--code-bg);overflow-x:auto;
  border-radius:0 0 14px 14px;transition:background .35s ease;
}
.tk{color:var(--muted)}
.tv{color:var(--ink)}
.tw{color:var(--accent-ink);font-weight:500}
#model-line,#window-line,#content-line{display:inline-block;transition:opacity .4s ease}
@keyframes flow{to{transform:translateX(-300px)}}
.flow-slow{animation:flow 30s linear infinite}
.flow-fast{animation:flow 22s linear infinite}
section{padding:70px 0}
.reveal{opacity:0;transform:translateY(16px);transition:opacity .8s ease,transform .8s ease}
.reveal.in{opacity:1;transform:translateY(0)}
@media (prefers-reduced-motion: reduce){
  .reveal{opacity:1;transform:none;transition:none}
  .flow-slow,.flow-fast,.surplus-line{animation:none}
}
h2{font-size:1.75rem;font-weight:600;letter-spacing:-.02em;line-height:1.15}
.lede{color:var(--muted);margin-top:16px;max-width:58ch}
.lede em{font-style:normal;color:var(--ink)}
.panel-row{display:grid;grid-template-columns:1fr 1fr;gap:clamp(10px,3vw,20px);margin-top:40px}
.panel{padding:clamp(12px,4vw,22px) clamp(12px,4vw,22px) clamp(10px,3vw,18px)}
.panel-label{
  font-family:"JetBrains Mono",monospace;font-size:clamp(10px,2.6vw,12px);color:var(--muted);
  display:flex;flex-wrap:wrap;justify-content:space-between;gap:4px;margin-bottom:16px;
}
.panel-label b{font-weight:500;color:var(--ink)}
.panel-util{font-family:"JetBrains Mono",monospace;font-size:12px}
.util-low{color:var(--muted)}
.util-high{color:var(--accent)}
.viz-caption{font-size:14px;color:var(--muted);margin-top:18px;max-width:60ch}
.chart-box{margin-top:40px;padding:28px 26px 20px}
.chart-legend{
  display:flex;gap:22px;flex-wrap:wrap;font-family:"JetBrains Mono",monospace;
  font-size:12px;color:var(--muted);margin-bottom:18px;
}
.chart-legend span{display:flex;align-items:center;gap:8px}
.swatch-gray{width:20px;height:3px;border-radius:2px;background:var(--muted)}
.swatch-solid{width:20px;height:3px;border-radius:2px;background:var(--accent)}
.chart-caption{margin-top:20px;font-size:15.5px}
.chart-caption b{font-weight:500}
.chart-footer{
  margin-top:10px;font-family:"JetBrains Mono",monospace;
  font-size:12.5px;color:var(--accent);
}
.beta{padding:70px 0 130px}
.beta-form{display:grid;gap:16px;margin-top:28px;padding:24px;max-width:480px;transition:opacity .35s ease,transform .35s ease}
.beta-form.is-hiding{opacity:0;transform:translateY(-6px)}
.beta-form label{display:grid;gap:8px;color:var(--muted);font-size:14px}
.beta-form input,
.beta-form textarea{
  width:100%;font-family:inherit;font-size:16px;color:var(--ink);
  background:var(--surface);border:1px solid var(--line);border-radius:8px;
  padding:12px 16px;outline:none;transition:border-color .2s;
}
.beta-form textarea{resize:vertical;line-height:1.5}
.beta-form input:focus,
.beta-form textarea:focus{border-color:var(--accent)}
.form-field-hidden{
  position:absolute;width:1px;height:1px;overflow:hidden;
  clip:rect(0,0,0,0);white-space:nowrap;
}
.beta-success{
  margin-top:28px;padding:24px;max-width:480px;
  border-color:var(--accent);
  opacity:0;transform:translateY(6px);
  transition:opacity .35s ease,transform .35s ease;
}
.beta-success.is-visible{opacity:1;transform:translateY(0)}
.beta-success-title{font-size:1.1rem;font-weight:600;color:var(--ink)}
.beta-success-note{margin-top:8px;color:var(--muted);font-size:15px}

.beta-micro{font-size:14px;color:var(--muted);margin-top:14px;transition:opacity .35s ease}
.beta-micro.is-error{color:#e05a4e}
.beta-micro.is-hidden{opacity:0}
footer{
  border-top:1px solid var(--line);padding:28px 0 48px;
  display:flex;flex-wrap:wrap;gap:8px 16px;justify-content:space-between;
  font-size:13px;color:var(--muted);
}
svg text{font-family:"Instrument Sans",system-ui,sans-serif}
svg .mono{font-family:"JetBrains Mono",monospace}