:root {
  --bg: #0f1115;
  --panel: #171a21;
  --panel-2: #1e222b;
  --line: #2a2f3a;
  --text: #e8eaf0;
  --muted: #8b93a7;
  --accent: #f5b942;
  --accent-ink: #1a1400;
  --ok: #6ee7a8;
  --bad: #ff7b72;
  --radius: 18px;
  --sans: 'IBM Plex Sans', system-ui, -apple-system, Segoe UI, Roboto, sans-serif;
  --display: 'Space Grotesk', var(--sans);
  --mono: 'IBM Plex Mono', ui-monospace, SFMono-Regular, Menlo, monospace;
}
* { box-sizing: border-box; }
html, body { margin: 0; height: 100%; background: var(--bg); color: var(--text); font-family: var(--sans); font-size: 15px; line-height: 1.5; }
a { color: var(--accent); }
button { font: inherit; }
.app { display: grid; grid-template-columns: 300px 1fr; height: 100dvh; }

/* rail */
.rail { border-right: 1px solid var(--line); background: var(--panel); padding: 22px 20px; display: flex; flex-direction: column; gap: 18px; overflow: auto; }
.brand { display: flex; align-items: center; gap: 12px; }
.mark { width: 34px; height: 34px; border-radius: 50%; background: radial-gradient(circle at 50% 50%, var(--bg) 0 5px, var(--accent) 6px); box-shadow: 0 0 0 2px #2c2410; }
.brand-name { font-family: var(--display); font-weight: 700; font-size: 18px; letter-spacing: -0.01em; }
.brand-sub { color: var(--muted); font-size: 12.5px; }
.pill { display: inline-flex; align-items: center; gap: 8px; padding: 6px 12px; border-radius: 999px; background: var(--panel-2); border: 1px solid var(--line); font-size: 12.5px; color: var(--muted); }
.pill .dot { width: 8px; height: 8px; border-radius: 50%; background: var(--muted); }
.pill.ok .dot { background: var(--ok); box-shadow: 0 0 10px var(--ok); }
.pill.bad .dot { background: var(--bad); }
.rail-block h2 { font-family: var(--display); font-size: 12px; letter-spacing: 0.08em; text-transform: uppercase; color: var(--muted); margin: 0 0 8px; }
.rail-block ol { margin: 0; padding-left: 18px; color: #c5cad6; font-size: 13.5px; }
.rail-block li + li { margin-top: 6px; }
.rail-block.grow { flex: 1; min-height: 120px; }
.kv { display: flex; justify-content: space-between; gap: 10px; font-size: 13.5px; padding: 4px 0; border-bottom: 1px dashed var(--line); }
.kv span { color: var(--muted); }
.activity { list-style: none; margin: 0; padding: 0; font-size: 12.5px; font-family: var(--mono); color: #c5cad6; }
.activity li { padding: 5px 0; border-bottom: 1px solid var(--line); display: flex; gap: 8px; align-items: baseline; }
.activity li .t { color: var(--accent); }
.activity li.err .t { color: var(--bad); }
.muted { color: var(--muted); }
.rail-foot { display: flex; justify-content: space-between; align-items: center; font-size: 12.5px; }
button.link { background: none; border: 0; color: var(--muted); cursor: pointer; padding: 0; text-decoration: underline; }
button.link:hover { color: var(--text); }

/* chat */
.chat { display: flex; flex-direction: column; min-width: 0; }
.topbar { padding: 18px 28px 14px; border-bottom: 1px solid var(--line); }
.topbar-title { font-family: var(--display); font-weight: 700; font-size: 22px; letter-spacing: -0.02em; }
.topbar-sub { color: var(--muted); font-size: 13.5px; }
.scroll { flex: 1; overflow: auto; padding: 24px 28px; }
.thread { max-width: 900px; margin: 0 auto; display: flex; flex-direction: column; gap: 14px; }
.msg { display: flex; }
.msg.user { justify-content: flex-end; }
.bubble { max-width: 78%; padding: 12px 16px; border-radius: var(--radius); white-space: pre-wrap; word-wrap: break-word; }
.msg.agent .bubble { background: var(--panel); border: 1px solid var(--line); border-top-left-radius: 6px; }
.msg.user .bubble { background: var(--accent); color: var(--accent-ink); border-top-right-radius: 6px; font-weight: 500; }
.bubble.thinking { color: var(--muted); font-style: italic; }
.msg.seller .bubble { background: #14232b; border: 1px solid #1f4a5a; border-top-left-radius: 6px; color: #d8f0f7; }
.msg.seller .who { font-family: var(--display); font-size: 11px; letter-spacing: 0.08em; text-transform: uppercase; color: #6cc7e0; margin-bottom: 4px; }
.bubble.error { border-color: var(--bad); color: var(--bad); }

.steps { display: flex; flex-direction: column; gap: 6px; max-width: 78%; }
.step { display: flex; gap: 10px; align-items: center; font-size: 12.5px; font-family: var(--mono); color: var(--muted); padding: 6px 12px; background: var(--panel-2); border: 1px solid var(--line); border-radius: 10px; }
.step .ico { width: 14px; height: 14px; border-radius: 50%; border: 2px solid var(--muted); border-top-color: var(--accent); animation: spin 0.9s linear infinite; flex: none; }
.step.done .ico { border: 0; background: var(--ok); animation: none; }
.step.fail .ico { border: 0; background: var(--bad); animation: none; }
.step b { color: var(--text); font-weight: 500; }
@keyframes spin { to { transform: rotate(360deg); } }

/* cards */
.cards { display: grid; grid-template-columns: repeat(auto-fill, minmax(230px, 1fr)); gap: 12px; max-width: 900px; width: 100%; }
.card { background: var(--panel); border: 1px solid var(--line); border-radius: 16px; overflow: hidden; display: flex; flex-direction: column; }
.card img { width: 100%; aspect-ratio: 4 / 3; object-fit: cover; display: block; background: var(--panel-2); }
.card .noimg { aspect-ratio: 4 / 3; display: grid; place-items: center; font-family: var(--display); color: var(--muted); font-size: 34px; background: var(--panel-2); }
.card-body { padding: 12px 14px 14px; display: flex; flex-direction: column; gap: 6px; flex: 1; }
.card-title { font-family: var(--display); font-weight: 700; font-size: 15px; line-height: 1.25; }
.card-sub { color: var(--muted); font-size: 12.5px; }
.card-price { font-family: var(--display); font-size: 20px; font-weight: 700; margin-top: 2px; }
.card-price small { font-size: 12px; color: var(--muted); font-weight: 500; font-family: var(--sans); }
.tags { display: flex; flex-wrap: wrap; gap: 6px; }
.tag { font-size: 11.5px; padding: 3px 8px; border-radius: 999px; background: var(--panel-2); border: 1px solid var(--line); color: #c5cad6; }
.tag.ok { color: var(--ok); border-color: #22503a; }
.tag.warn { color: var(--accent); border-color: #4a3a12; }
.card-actions { margin-top: auto; display: flex; gap: 8px; padding-top: 6px; }
.btn { border: 1px solid var(--line); background: var(--panel-2); color: var(--text); padding: 7px 12px; border-radius: 999px; cursor: pointer; font-size: 13px; }
.btn.primary { background: var(--accent); color: var(--accent-ink); border-color: var(--accent); font-weight: 600; }
.btn:hover { filter: brightness(1.08); }
.btn:disabled { opacity: 0.5; cursor: default; }

.booked { max-width: 78%; background: linear-gradient(180deg, #14231b, var(--panel)); border: 1px solid #22503a; border-radius: var(--radius); padding: 14px 16px; display: grid; grid-template-columns: 96px 1fr; gap: 14px; }
.booked img { width: 96px; height: 96px; object-fit: cover; border-radius: 12px; }
.booked h3 { margin: 0 0 4px; font-family: var(--display); font-size: 16px; color: var(--ok); }
.booked .mono { font-family: var(--mono); font-size: 11.5px; color: var(--muted); word-break: break-all; }
.booked .links { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 8px; }
.booked .links a { font-size: 12.5px; padding: 5px 10px; border-radius: 999px; border: 1px solid #22503a; text-decoration: none; color: var(--ok); }
.reserved { max-width: 78%; background: var(--panel); border: 1px solid #4a3a12; border-radius: var(--radius); padding: 12px 16px; font-size: 13.5px; }
.reserved .mono { font-family: var(--mono); font-size: 11.5px; color: var(--muted); word-break: break-all; }

.suggest { max-width: 900px; margin: 18px auto 0; display: flex; flex-wrap: wrap; gap: 8px; }
.suggest button { border: 1px solid var(--line); background: var(--panel); color: #c5cad6; padding: 8px 14px; border-radius: 999px; cursor: pointer; font-size: 13px; }
.suggest button:hover { border-color: var(--accent); color: var(--text); }
.suggest[hidden] { display: none; }

.composer { display: flex; gap: 10px; padding: 14px 28px 20px; border-top: 1px solid var(--line); background: var(--panel); }
.composer textarea { flex: 1; resize: none; background: var(--bg); color: var(--text); border: 1px solid var(--line); border-radius: 14px; padding: 12px 14px; font: inherit; max-height: 160px; outline: none; }
.composer textarea:focus { border-color: var(--accent); }
.composer button { width: 46px; height: 46px; border-radius: 50%; border: 0; background: var(--accent); color: var(--accent-ink); cursor: pointer; display: grid; place-items: center; }
.composer button:disabled { opacity: 0.45; cursor: default; }

@media (max-width: 860px) {
  .app { grid-template-columns: 1fr; grid-template-rows: auto 1fr; }
  .rail { border-right: 0; border-bottom: 1px solid var(--line); flex-direction: row; flex-wrap: wrap; align-items: center; gap: 12px; padding: 12px 16px; }
  .rail-block, .rail-foot { display: none; }
  .topbar, .scroll, .composer { padding-left: 16px; padding-right: 16px; }
  .bubble, .steps, .booked, .reserved { max-width: 92%; }
}