:root {
  --bg: #f6f7f9; --fg: #1b1f24; --muted: #5d6673; --card: #ffffff; --line: #dde1e6;
  --accent: #1f3a5f; --accent-fg: #ffffff; --mine: #e3ecf7; --warn: #8a5a00; --ok: #1d6b3a; --bad: #a12a2a;
}
@media (prefers-color-scheme: dark) {
  :root { --bg: #111418; --fg: #e8ebef; --muted: #9aa3ae; --card: #1b2026; --line: #2c333b;
    --accent: #7fa7d8; --accent-fg: #0d1117; --mine: #1e2a3a; --warn: #e0b45a; --ok: #6fcf97; --bad: #f08080; }
}
* { box-sizing: border-box; }
[hidden] { display: none !important; }
html, body { height: 100%; }
body { margin: 0; background: var(--bg); color: var(--fg); font: 16px/1.4 -apple-system, system-ui, "Segoe UI", Roboto, sans-serif;
  display: flex; flex-direction: column; padding: env(safe-area-inset-top) 0 env(safe-area-inset-bottom); }
header { display: flex; justify-content: space-between; align-items: center; padding: 10px 16px; border-bottom: 1px solid var(--line); }
.brand { font-weight: 700; font-size: 18px; }
button { font: inherit; border: 0; cursor: pointer; }
.link { background: none; color: var(--accent); padding: 6px 0; }
.primary { background: var(--accent); color: var(--accent-fg); border-radius: 10px; padding: 12px 18px; font-weight: 600; }
.gate { flex: 1; display: flex; flex-direction: column; justify-content: center; align-items: center; gap: 16px; padding: 24px 16px; text-align: center; }
.hint { color: var(--muted); font-size: 14px; }
main, #queue { flex: 1; overflow-y: auto; padding: 12px 16px; }
ol { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 10px; }
.msg { max-width: 88%; padding: 10px 12px; border-radius: 14px; white-space: pre-wrap; overflow-wrap: anywhere; }
.msg.user { align-self: flex-end; background: var(--mine); }
.msg.assistant { align-self: flex-start; background: var(--card); border: 1px solid var(--line); }
.msg.pending { color: var(--muted); }
.msg a { color: var(--accent); }
.card { align-self: stretch; background: var(--card); border: 1px solid var(--line); border-left: 4px solid var(--warn); border-radius: 10px; padding: 10px 12px; }
.card .actions { display: flex; gap: 10px; margin-top: 8px; }
.card .actions button { padding: 8px 12px; border-radius: 8px; }
.card .cancel { background: none; color: var(--muted); }
.status-pending, .status-running, .status-proposed { color: var(--warn); }
.status-done { color: var(--ok); }
.status-failed, .status-cancelled { color: var(--bad); }
#composer { display: flex; gap: 8px; padding: 8px 12px; border-top: 1px solid var(--line); background: var(--bg); align-items: flex-end; }
#input { flex: 1; resize: none; max-height: 140px; font: inherit; padding: 10px 12px; border-radius: 12px; border: 1px solid var(--line); background: var(--card); color: var(--fg); }
#attachments { display: flex; gap: 8px; padding: 8px 12px 0; overflow-x: auto; }
.chip { position: relative; flex: none; width: 64px; height: 64px; border-radius: 10px; border: 1px solid var(--line); background: var(--card) center/cover no-repeat;
  display: flex; align-items: center; justify-content: center; font-size: 12px; color: var(--muted); }
.chip.busy { opacity: .5; }
.chip button { position: absolute; top: -6px; right: -6px; width: 22px; height: 22px; border-radius: 50%; background: var(--fg); color: var(--bg); font-size: 12px; line-height: 22px; padding: 0; }
.msg .thumbs { display: flex; gap: 6px; margin-bottom: 6px; flex-wrap: wrap; }
.msg .thumbs img { width: 72px; height: 72px; object-fit: cover; border-radius: 8px; }
.msg .thumbs span { font-size: 13px; }
#attach, #mic, #send { width: 44px; height: 44px; border-radius: 50%; background: var(--card); border: 1px solid var(--line); font-size: 18px; flex: none; }
#send { background: var(--accent); color: var(--accent-fg); border: 0; }
#attach { background: var(--card); border: 1px solid var(--line); border-radius: 50%; font-size: 18px; flex: none; }
#mic.recording { background: var(--bad); color: #fff; border-color: var(--bad); }
#queue h2 { margin: 0 0 4px; font-size: 18px; }
#queue li { background: var(--card); border: 1px solid var(--line); border-radius: 10px; padding: 10px 12px; }
#queue li small { display: block; color: var(--muted); margin-top: 4px; }