:root {
  --bg: #0f1419;
  --bg2: #161d26;
  --line: #243040;
  --text: #e8eef5;
  --muted: #8b9aab;
  --acc: #38bdf8;
  --ok: #34d399;
  --err: #f87171;
  --seller: #f59e0b;
  --buyer: #38bdf8;
}
* { box-sizing: border-box; }
html, body { margin: 0; background: var(--bg); color: var(--text); font: 15px/1.5 system-ui, sans-serif; }
a { color: var(--acc); text-decoration: none; }
a:hover { text-decoration: underline; }
.shell { max-width: 1100px; margin: 0 auto; padding: 20px; }
.top { display: flex; justify-content: space-between; gap: 16px; align-items: baseline; flex-wrap: wrap; border-bottom: 1px solid var(--line); padding-bottom: 12px; margin-bottom: 20px; }
.brand a { color: var(--text); font-weight: 700; font-size: 18px; margin-right: 8px; }
.top nav { display: flex; gap: 14px; }
.top nav a.on { color: var(--text); border-bottom: 2px solid var(--acc); }
.muted { color: var(--muted); font-size: 13px; }
.main { min-height: 60vh; }
.foot { margin-top: 40px; padding-top: 12px; border-top: 1px solid var(--line); }
.row { display: grid; grid-template-columns: 1.4fr 0.8fr; gap: 18px; }
@media (max-width: 860px) { .row { grid-template-columns: 1fr; } }
.card { background: var(--bg2); border: 1px solid var(--line); padding: 16px 18px; }
.side { align-self: start; }
h1, h2 { margin: 0 0 10px; font-size: 18px; }
.stack, .grid2 { display: grid; gap: 10px; }
.grid2 { grid-template-columns: 1fr 1fr; }
.grid2 .wide { grid-column: 1 / -1; }
@media (max-width: 700px) { .grid2 { grid-template-columns: 1fr; } }
label { display: grid; gap: 4px; font-size: 13px; color: var(--muted); }
input, select, button, textarea {
  font: inherit; color: var(--text); background: #0c1116; border: 1px solid var(--line); padding: 8px 10px; width: 100%;
}
button, .btn {
  display: inline-block; background: var(--acc); color: #08212e; border: 0; font-weight: 650; cursor: pointer; padding: 8px 12px; width: auto;
}
.btn.ghost { background: transparent; color: var(--text); border: 1px solid var(--line); }
.err { color: var(--err); }
.ok { color: var(--ok); }
.list { display: grid; gap: 10px; }
.agent { display: flex; justify-content: space-between; gap: 12px; border: 1px solid var(--line); padding: 12px; flex-wrap: wrap; }
.actions { display: flex; gap: 8px; align-items: start; }
.badge { display: inline-block; font-size: 11px; padding: 1px 7px; border: 1px solid var(--line); margin-left: 6px; vertical-align: middle; }
.badge.seller { border-color: var(--seller); color: var(--seller); }
.badge.buyer { border-color: var(--buyer); color: var(--buyer); }
code { font-size: 12px; color: #c9d6e2; word-break: break-all; }
.login-body { min-height: 100vh; display: grid; place-items: center; }
.login-card { width: min(420px, 92vw); background: var(--bg2); border: 1px solid var(--line); padding: 28px; display: grid; gap: 12px; }
.talk { border: 1px solid var(--line); padding: 8px 12px; margin: 8px 0; }
.talk summary { cursor: pointer; }
.turns { padding-left: 18px; }
.turns li { margin: 12px 0; }
.reply { border-left: 2px solid var(--acc); padding-left: 10px; }
pre { background: #0c1116; padding: 10px; overflow: auto; font-size: 12px; }
hr { border: 0; border-top: 1px solid var(--line); margin: 16px 0; }