:root {
  --bg: #f7f7f5;
  --card: #ffffff;
  --text: #1c1c1a;
  --muted: #6b6b66;
  --line: #e4e3df;
  --accent: #1f6feb;
  --agent: #eaf1fd;
  --biz: #f0efeb;
  --ok: #1a7f37;
  --warn: #9a6700;
  --bad: #cf222e;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #151514;
    --card: #1f1f1d;
    --text: #ecebe7;
    --muted: #9b9a94;
    --line: #2f2f2c;
    --accent: #4c8dff;
    --agent: #1c2a42;
    --biz: #2a2a27;
    --ok: #3fb950;
    --warn: #d29922;
    --bad: #f85149;
  }
}
* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 16px/1.45 system-ui, -apple-system, "Segoe UI", sans-serif;
}
main { max-width: 640px; margin: 0 auto; padding: 16px 16px calc(24px + env(safe-area-inset-bottom)); }
header { padding: 4px 0 16px; }
.brand { font-weight: 700; color: var(--text); text-decoration: none; }
h1 { font-size: 1.6rem; line-height: 1.2; margin: 24px 0 8px; }
.sub { color: var(--muted); margin: 0 0 20px; }
section { margin-bottom: 12px; }

.msg { padding: 10px 14px; border-radius: 14px; margin: 8px 0; max-width: 88%; white-space: pre-wrap; overflow-wrap: anywhere; }
.msg.user { background: var(--accent); color: #fff; margin-left: auto; border-bottom-right-radius: 4px; }
.msg.assistant { background: var(--card); border: 1px solid var(--line); border-bottom-left-radius: 4px; }
.msg.note { background: transparent; color: var(--muted); font-size: .9rem; max-width: 100%; padding: 4px 0; }
.msg.agent { background: var(--agent); border-bottom-left-radius: 4px; }
.msg.business { background: var(--biz); margin-left: auto; border-bottom-right-radius: 4px; }
.msg.partial { opacity: .65; }
.who { display: block; font-size: .75rem; color: var(--muted); margin-bottom: 2px; }
.thinking { color: var(--muted); font-size: .9rem; }

.card { background: var(--card); border: 1px solid var(--line); border-radius: 16px; padding: 16px; }
.card h2 { font-size: 1.1rem; margin: 0 0 4px; }
.card .meta { color: var(--muted); font-size: .9rem; margin: 0 0 12px; }
.price { font-size: 1.4rem; font-weight: 700; }
.or { text-align: center; color: var(--muted); font-size: .85rem; margin: 12px 0; }

.status { font-weight: 600; padding: 8px 0; display: flex; align-items: center; gap: 8px; }
.dot { width: 10px; height: 10px; border-radius: 50%; background: var(--warn); }
.dot.on { background: var(--ok); animation: pulse 1.5s infinite; }
@keyframes pulse { 50% { opacity: .4; } }

.ok { color: var(--ok); }
.bad { color: var(--bad); }

form#composer { position: sticky; bottom: 0; background: var(--bg); padding-top: 8px; display: grid; grid-template-columns: 1fr auto; gap: 8px; }
textarea {
  width: 100%; resize: none; font: inherit; color: var(--text); background: var(--card);
  border: 1px solid var(--line); border-radius: 12px; padding: 10px 12px; min-height: 48px;
}
textarea:focus { outline: 2px solid var(--accent); border-color: transparent; }
button {
  font: inherit; font-weight: 600; border: 0; border-radius: 12px; padding: 0 18px; min-height: 44px;
  background: var(--accent); color: #fff; cursor: pointer;
}
button.secondary { background: var(--biz); color: var(--text); }
button:disabled { opacity: .5; cursor: default; }
.row { display: flex; gap: 8px; flex-wrap: wrap; margin-top: 10px; }
.hint { grid-column: 1 / -1; margin: 0; color: var(--muted); font-size: .85rem; min-height: 1em; }
a { color: var(--accent); }