* { box-sizing: border-box; }
body { font-family: system-ui, -apple-system, Segoe UI, Roboto, Arial, sans-serif; margin: 0; padding: 24px; background: #f7f7f9; color: #222; }
.container { max-width: 760px; margin: 0 auto; }
h1 { margin-top: 0; }
.muted { color: #666; }
.small { font-size: 12px; }
.chatlog { background: #fff; border: 1px solid #e5e5ea; border-radius: 8px; height: 380px; overflow: auto; padding: 12px; margin: 12px 0; }
.msg { margin: 8px 0; }
.msg b { display: inline-block; min-width: 52px; }
.row { display: flex; gap: 8px; }
input { flex: 1; padding: 10px 12px; border: 1px solid #ccc; border-radius: 8px; }
button { padding: 10px 16px; border-radius: 8px; border: none; background: #1e2a78; color: #fff; cursor: pointer; }
button:hover { opacity: .95; }
.card { background: #fff; border: 1px solid #e5e5ea; border-radius: 8px; padding: 12px; margin: 12px 0; }
.error { color: #b00020; }
.success { color: #0a7d29; }
.citation { font-size: 12px; color: #555; margin-left: 52px; }