/* AI Chatbot v1 — site */
:root {
  --cb-bg: #0b1220;
  --cb-card: #111827;
  --cb-text: #e5e7eb;
  --cb-muted: #9ca3af;
  --cb-accent: #0ea5e9;
  --cb-radius: 16px;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: "Segoe UI", system-ui, sans-serif;
  background: radial-gradient(1200px 600px at 10% -10%, #0c4a6e55, transparent),
              radial-gradient(900px 500px at 100% 0%, #0369a155, transparent),
              var(--cb-bg);
  color: var(--cb-text);
  min-height: 100vh;
}
.wrap { max-width: 960px; margin: 0 auto; padding: 2.5rem 1.25rem 4rem; }
.hero h1 { font-size: clamp(1.8rem, 4vw, 2.6rem); margin: 0 0 .75rem; letter-spacing: -.02em; }
.hero p { color: var(--cb-muted); font-size: 1.05rem; line-height: 1.6; max-width: 36rem; }
.card {
  background: color-mix(in srgb, var(--cb-card) 88%, transparent);
  border: 1px solid #1f2937;
  border-radius: var(--cb-radius);
  padding: 1.25rem 1.35rem;
  margin-top: 1.5rem;
}
.card h2 { margin: 0 0 .75rem; font-size: 1.1rem; }
code, pre {
  background: #030712;
  border-radius: 8px;
  font-size: .85rem;
}
pre { padding: 1rem; overflow: auto; border: 1px solid #1f2937; }
.btn {
  display: inline-block;
  background: var(--cb-accent);
  color: #041018;
  font-weight: 700;
  text-decoration: none;
  padding: .65rem 1.1rem;
  border-radius: 999px;
  border: 0;
  cursor: pointer;
}
.btn-ghost { background: transparent; color: var(--cb-text); border: 1px solid #374151; }
.row { display: flex; flex-wrap: wrap; gap: .75rem; margin-top: 1.25rem; }
.chat-demo {
  display: flex;
  flex-direction: column;
  height: 380px;
  background: #030712;
  border-radius: 12px;
  border: 1px solid #1f2937;
  overflow: hidden;
}
.chat-log { flex: 1; overflow: auto; padding: 1rem; display: flex; flex-direction: column; gap: .65rem; }
.bubble {
  max-width: 85%;
  padding: .65rem .85rem;
  border-radius: 12px;
  line-height: 1.45;
  font-size: .95rem;
  white-space: pre-wrap;
}
.bubble.user { align-self: flex-end; background: #0c4a6e; }
.bubble.bot { align-self: flex-start; background: #1f2937; }
.chat-form { display: flex; gap: .5rem; padding: .75rem; border-top: 1px solid #1f2937; }
.chat-form input {
  flex: 1;
  background: #111827;
  border: 1px solid #374151;
  color: #fff;
  border-radius: 10px;
  padding: .65rem .85rem;
}
.muted { color: var(--cb-muted); font-size: .9rem; }