/* The demo page. Plain CSS in a file of its own, no inline styles: the page
   runs under a strict CSP to show the library needs nothing more. It is an
   ordinary page on purpose, so the simulation has something to build. */
:root {
  color-scheme: light dark;
  --bg: #F7F7FA;
  --surface: #FFFFFF;
  --text: #15151C;
  --muted: #555566;
  --line: #E2E2EA;
  --accent: #5546E8;
  --code: #F0F0F5;
  --radius: 14px;
  --font: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --mono: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  --agent-accent: #6E5CFF;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0B0B10;
    --surface: #14141B;
    --text: #EDEDF2;
    --muted: #A3A3B5;
    --line: #262631;
    --accent: #A99BFF;
    --code: #101017;
    --agent-accent: #8C7DFF;
  }
}

*, *::before, *::after { box-sizing: border-box; }
/* Smooth scrolling on purpose: the library turns it off while it runs. */
html { scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
}
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 400 1rem/1.6 var(--font);
  -webkit-font-smoothing: antialiased;
}
a { color: var(--accent); }
img { max-width: 100%; height: auto; }
code { font-family: var(--mono); font-size: 0.875em; }
h1, h2, h3 { text-wrap: balance; }

.wrap { width: min(100% - 32px, 1080px); margin-inline: auto; }

.skip {
  position: absolute;
  top: -48px;
  left: 16px;
  z-index: 20;
  padding: 8px 14px;
  border-radius: 8px;
  background: var(--text);
  color: var(--bg);
}
.skip:focus { top: 16px; }

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  border-bottom: 1px solid var(--line);
  background: var(--bg);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  min-height: 60px;
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--text);
  font-weight: 650;
  text-decoration: none;
}
.site-header nav ul {
  display: flex;
  flex-wrap: wrap;
  gap: 4px 20px;
  margin: 0;
  padding: 0;
  list-style: none;
}
.site-header nav a { color: var(--muted); font-size: 0.9375rem; text-decoration: none; }
.site-header nav a:hover { color: var(--text); }

.hero { padding: 96px 0 72px; }
.eyebrow {
  margin: 0 0 16px;
  color: var(--accent);
  font: 600 0.75rem/1.4 var(--mono);
  letter-spacing: 0.12em;
  text-transform: uppercase;
}
h1 {
  max-width: 17ch;
  margin: 0;
  font-size: clamp(2.25rem, 4vw + 1rem, 4rem);
  line-height: 1.05;
  letter-spacing: -0.03em;
}
.lead {
  max-width: 62ch;
  margin: 24px 0 0;
  color: var(--muted);
  font-size: 1.125rem;
}
.cta-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
  margin-top: 32px;
}
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 9px 18px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--surface);
  color: var(--text);
  font: 500 0.9375rem/1.4 var(--font);
  text-decoration: none;
  cursor: pointer;
}
.btn:hover { border-color: var(--accent); }
.btn:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
.btn[hidden] { display: none; }
.languages { margin: 20px 0 0; color: var(--muted); font-size: 0.875rem; }
.languages a[aria-current="true"] { color: var(--text); font-weight: 600; text-decoration: none; }
.motion-note { display: none; max-width: 62ch; margin: 16px 0 0; color: var(--muted); font-size: 0.875rem; }
@media (prefers-reduced-motion: reduce) {
  .motion-note { display: block; }
}

main > section + section { padding: 72px 0; border-top: 1px solid var(--line); }
h2 {
  margin: 0;
  font-size: clamp(1.5rem, 2vw + 1rem, 2.25rem);
  line-height: 1.15;
  letter-spacing: -0.02em;
}
.section-intro { max-width: 64ch; margin: 12px 0 0; color: var(--muted); }
pre {
  margin: 24px 0 0;
  padding: 20px;
  overflow-x: auto;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--code);
  font: 0.8125rem/1.7 var(--mono);
}
pre code { font-size: inherit; }

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
  gap: 16px;
  margin-top: 32px;
}
.card {
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
}
.card h3 { margin: 0; font-size: 1.0625rem; }
.card p { margin: 8px 0 0; color: var(--muted); font-size: 0.9375rem; }

.split {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(0, 1fr);
  gap: 48px;
  align-items: center;
}
figure { margin: 0; }
figure img {
  display: block;
  width: 100%;
  border: 1px solid var(--line);
  border-radius: var(--radius);
}
figcaption { margin-top: 12px; color: var(--muted); font-size: 0.875rem; }
.steps { margin: 20px 0 0; padding-left: 1.25em; color: var(--muted); }
.steps li + li { margin-top: 10px; }
.steps strong { color: var(--text); }

.table-wrap {
  margin-top: 24px;
  overflow-x: auto;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
}
table { width: 100%; border-collapse: collapse; font-size: 0.9375rem; }
th, td {
  padding: 12px 16px;
  border-bottom: 1px solid var(--line);
  text-align: left;
  vertical-align: top;
}
thead th {
  color: var(--muted);
  font: 600 0.75rem/1.4 var(--mono);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}
tbody tr:last-child td { border-bottom: 0; }
td:first-child code, td:nth-child(2) code { white-space: nowrap; }

.log-title { margin: 32px 0 0; font-size: 1rem; }
.log {
  margin: 12px 0 0;
  padding: 16px 20px;
  border: 1px dashed var(--line);
  border-radius: var(--radius);
  color: var(--muted);
  font: 0.8125rem/1.7 var(--mono);
  list-style: none;
}

.site-footer {
  padding: 40px 0 64px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.875rem;
}
.site-footer p { margin: 0; }
.site-footer p + p { margin-top: 8px; }

/* The intro. It is opaque and sits over the real page, which stays laid out
   behind it so the library can measure it. intro-gate.js switches it on
   before the first paint; reduced motion never sees it, even if the
   preference changes halfway through. */
html[data-demo-intro] { overflow: hidden; }
html[data-demo-intro] .intro[hidden] { display: block; }
@media (prefers-reduced-motion: reduce) {
  html[data-demo-intro] { overflow: auto; }
  html[data-demo-intro] .intro[hidden],
  .intro { display: none !important; }
}
.intro {
  --disc: clamp(176px, 30vmin, 256px);
  /* The library's hub appears at this height, so the button turns into it. */
  --centre: min(45vh, 380px);
  --gap: 36px;
  position: fixed;
  inset: 0;
  z-index: 2147482000;
  overflow: hidden;
  background-color: var(--bg);
  background-image: radial-gradient(var(--line) 1px, transparent 1px);
  background-size: 24px 24px;
  color: var(--text);
  font: 400 1rem/1.5 var(--font);
}
.intro-brand { position: absolute; top: 16px; left: 24px; }
.intro-stage {
  position: absolute;
  top: var(--centre);
  left: 50%;
  width: var(--disc);
  height: var(--disc);
  transform: translate(-50%, -50%);
}
.intro [data-agent-build],
.intro-ghost {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 14px;
  width: var(--disc);
  height: var(--disc);
  padding: 24px;
  border: 0;
  border-radius: 50%;
  background: radial-gradient(circle at 38% 30%, #7F6FFF, #5546E8 60%, #4435C9);
  box-shadow: 0 10px 0 #2F2499, 0 24px 48px rgba(85, 70, 232, 0.45), inset 0 2px 0 rgba(255, 255, 255, 0.35);
  color: #FFFFFF;
  font: 700 clamp(1.125rem, 2.8vmin, 1.5rem)/1.15 var(--font);
  letter-spacing: -0.01em;
  text-align: center;
  text-transform: none;
  text-wrap: balance;
}
.intro [data-agent-build] {
  cursor: pointer;
  transition: transform 90ms ease, box-shadow 90ms ease;
}
.intro [data-agent-build]:hover { transform: translateY(-2px); }
.intro [data-agent-build]:active {
  transform: translateY(8px);
  box-shadow: 0 2px 0 #2F2499, 0 8px 20px rgba(85, 70, 232, 0.45), inset 0 2px 0 rgba(255, 255, 255, 0.35);
}
.intro [data-agent-build]:focus-visible { outline: 3px solid var(--text); outline-offset: 16px; }
.intro [data-agent-build]::after {
  content: "";
  position: absolute;
  inset: -2px;
  border-radius: 50%;
  border: 2px solid #5546E8;
  pointer-events: none;
  animation: intro-pulse 2.4s ease-out infinite;
}
@keyframes intro-pulse {
  from { opacity: 0.6; transform: scale(1); }
  to { opacity: 0; transform: scale(1.32); }
}
.intro-words {
  position: absolute;
  top: calc(var(--centre) + var(--disc) / 2 + var(--gap));
  left: 50%;
  width: min(100% - 32px, 46ch);
  transform: translateX(-50%);
  text-align: center;
}
.intro-line { margin: 0; font-weight: 600; font-size: 1.0625rem; text-wrap: balance; }
.intro-note { margin: 4px 0 0; color: var(--muted); font-size: 0.875rem; }
.intro-skip { display: inline-block; margin-top: 10px; padding: 4px 8px; font-size: 0.875rem; }
.intro-crowd { position: absolute; inset: 0; overflow: hidden; pointer-events: none; }
.intro-agent { position: absolute; top: 0; left: 0; will-change: transform; }
.intro-bubble {
  position: absolute;
  bottom: calc(100% + 4px);
  left: 8px;
  width: max-content;
  max-width: 190px;
  padding: 6px 11px;
  border-radius: 12px 12px 12px 3px;
  background: var(--agent);
  box-shadow: 0 6px 18px rgba(0, 0, 0, 0.28);
  color: #08080B;
  font: 600 0.8125rem/1.25 var(--font);
  transform-origin: 0 100%;
}
.intro-bubble--flipped {
  right: 8px;
  left: auto;
  border-radius: 12px 12px 3px 12px;
  text-align: right;
  transform-origin: 100% 100%;
}
@media (max-width: 719px) {
  .intro-bubble { max-width: 148px; }
}
/* In a low window the button shrinks and the words close up, so all of it
   fits, the note that it is a simulation included. Lower still, it scrolls. */
@media (max-height: 559px) {
  .intro {
    --disc: clamp(112px, 36vh, 176px);
    --gap: 18px;
    overflow-y: auto;
  }
  .intro [data-agent-build],
  .intro-ghost { gap: 6px; padding: 12px; font-size: 0.9375rem; }
  .intro-line { font-size: 0.9375rem; }
  .intro-note { margin-top: 0; font-size: 0.8125rem; }
  .intro-skip { margin-top: 2px; padding: 2px 8px; font-size: 0.8125rem; }
  .intro-bubble { max-width: 148px; }
}

@media (max-width: 800px) {
  .split { grid-template-columns: 1fr; gap: 32px; }
  .hero { padding: 64px 0 56px; }
}
@media (max-width: 560px) {
  .header-inner { flex-direction: column; align-items: flex-start; padding: 12px 0; }
}