:root {
  color-scheme: light;
  font-family:
    Charter,
    Georgia,
    "Iowan Old Style",
    serif;
  --border: #d4d4d8;
  --muted: #71717a;
  --selection: #fde68a;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: #fafafa;
  color: #18181b;
}

header {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 1.5rem;
  border-bottom: 1px solid var(--border);
  background: #fff;
  font-family: system-ui, -apple-system, sans-serif;
}

header h1 {
  font-size: 1.125rem;
  margin: 0;
  letter-spacing: 0.01em;
}

#connect {
  padding: 0.5rem 1rem;
  border: 1px solid var(--border);
  background: #fff;
  border-radius: 6px;
  cursor: pointer;
  font-size: 0.875rem;
  font-family: system-ui, -apple-system, sans-serif;
}

#connect:hover {
  background: #f4f4f5;
}

#connect[data-state="connected"] {
  background: #ef4444;
  color: white;
  border-color: #ef4444;
}

main {
  max-width: 720px;
  margin: 0 auto;
  padding: 2rem 1.5rem 4rem;
}

article h2 {
  margin: 0 0 1rem;
  font-size: 1.875rem;
  line-height: 1.2;
  letter-spacing: -0.01em;
}

article p {
  margin: 0 0 1.25rem;
  font-size: 1.125rem;
  line-height: 1.7;
  color: #27272a;
}

article p.lede {
  font-size: 1rem;
  line-height: 1.6;
  color: var(--muted);
  font-style: italic;
  margin-bottom: 2rem;
  border-left: 3px solid var(--border);
  padding-left: 1rem;
}

/* Make the user's text selection (and the agent's programmatic
   selection) visually distinct. The same color is used for both —
   the agent and the user are pointing at the same thing. */
::selection {
  background: var(--selection);
  color: #18181b;
}

/* Brief background flash when the agent calls ``highlight`` on a
   paragraph. Distinct from ``select_text`` (which uses the OS-level
   text selection) so the agent has two different visual idioms:
   "I'm pointing at this content" (select) vs "look at this fact"
   (flash). */
@keyframes flash-fade {
  0% {
    background: var(--selection);
  }
  100% {
    background: transparent;
  }
}

.flash {
  animation: flash-fade 1.5s ease-out;
  border-radius: 4px;
  margin-left: -0.25rem;
  padding-left: 0.25rem;
}

#status {
  position: fixed;
  bottom: 1rem;
  right: 1rem;
  padding: 0.5rem 0.75rem;
  border-radius: 6px;
  font-size: 0.8125rem;
  font-family: system-ui, -apple-system, sans-serif;
  background: #18181b;
  color: white;
  opacity: 0;
  transition: opacity 0.2s;
  pointer-events: none;
}

#status[data-show="1"] {
  opacity: 1;
}