:root {
  --bg: #f6f7f9; --card: #fff; --text: #1d2129; --muted: #6b7280; --line: #e3e5e8;
  --accent: #2563eb; --accent-text: #fff; --code-bg: #f3f4f6;
  --red: #dc2626; --red-bg: #fde8e8; --green: #15803d; --green-bg: #e3f6e9;
  --yellow: #b45309; --yellow-bg: #fdf3dc; --blue-bg: #e6eefc; --gray-bg: #eef0f3;
  --radius: 8px;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #111317; --card: #1a1d23; --text: #e5e7eb; --muted: #9aa1ad; --line: #2c313a;
    --accent: #5b93ff; --accent-text: #fff; --code-bg: #14171c;
    --red: #f87171; --red-bg: #3a1d1d; --green: #4ade80; --green-bg: #183223;
    --yellow: #fbbf24; --yellow-bg: #3a2e14; --blue-bg: #1c2a44; --gray-bg: #252a32;
  }
}
* { box-sizing: border-box; }
[hidden] { display: none !important; }
body {
  margin: 0; background: var(--bg); color: var(--text);
  font: 15px/1.6 system-ui, -apple-system, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
}
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
h1, h2, h3 { margin: 0 0 10px; line-height: 1.3; }
h2 { font-size: 18px; }
h3 { font-size: 16px; }

.top {
  position: sticky; top: 0; z-index: 10; display: flex; flex-wrap: wrap; gap: 8px 16px;
  align-items: center; justify-content: space-between;
  padding: 10px 16px; background: var(--card); border-bottom: 1px solid var(--line);
}
.brand { font-weight: 700; color: var(--text); }
.nav { display: flex; flex-wrap: wrap; gap: 14px; align-items: center; }
.nav a.active { font-weight: 700; }
.logged-out .nav { display: none; }
main { max-width: 1100px; margin: 0 auto; padding: 16px; }

.card { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 14px 16px; margin-bottom: 14px; }
.card.narrow { max-width: 420px; margin: 40px auto; }
.card.sub { border-left: 3px solid var(--accent); }
.sub-head { font-weight: 600; margin-bottom: 4px; }
.muted { color: var(--muted); }
.error { color: var(--red); }
.warn { background: var(--yellow-bg); border-left: 3px solid var(--yellow); padding: 8px 10px; border-radius: 4px; margin: 8px 0; }
.row .warn, .ask-box { width: 100%; }
.text { white-space: pre-wrap; word-break: break-word; }
.row { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; margin: 8px 0; }
.row h2, .row h3 { margin: 0; }
.meta { display: flex; flex-wrap: wrap; gap: 4px 16px; color: var(--muted); font-size: 14px; margin-bottom: 8px; }

button {
  font: inherit; cursor: pointer; border: 1px solid var(--accent); background: var(--accent);
  color: var(--accent-text); border-radius: 6px; padding: 5px 14px;
}
button.secondary { background: transparent; color: var(--accent); }
button.danger { background: transparent; color: var(--red); border-color: var(--red); }
button.link { border: none; background: none; color: var(--accent); padding: 0; }
button:disabled { opacity: .5; cursor: default; }
input, select, textarea {
  font: inherit; color: var(--text); background: var(--bg); border: 1px solid var(--line);
  border-radius: 6px; padding: 6px 8px; width: 100%;
}
textarea { resize: vertical; }
input[type=checkbox] { width: auto; margin: 0; }
.field { display: block; margin: 10px 0; }
.field > span { display: block; font-weight: 600; margin-bottom: 4px; }
.field > small { display: block; margin-top: 2px; }
.checks { display: flex; flex-wrap: wrap; gap: 6px 14px; }
.check { display: inline-flex; align-items: center; gap: 4px; font-weight: normal; }

.table-wrap { overflow-x: auto; }
table { border-collapse: collapse; width: 100%; }
th, td { text-align: left; padding: 7px 8px; border-bottom: 1px solid var(--line); vertical-align: top; }
th { color: var(--muted); font-weight: 600; white-space: nowrap; }
.badge { display: inline-block; padding: 0 8px; border-radius: 10px; font-size: 13px; background: var(--gray-bg); white-space: nowrap; }
.badge.red { background: var(--red-bg); color: var(--red); }
.badge.green { background: var(--green-bg); color: var(--green); }
.badge.yellow { background: var(--yellow-bg); color: var(--yellow); }
.badge.blue { background: var(--blue-bg); color: var(--accent); }
.list { margin: 0; padding-left: 20px; }
.list li { margin: 4px 0; }
.events li { font-size: 14px; }
dl.kv { display: grid; grid-template-columns: max-content 1fr; gap: 4px 12px; margin: 8px 0; }
dl.kv dt { color: var(--muted); }
dl.kv dd { margin: 0; white-space: pre-wrap; word-break: break-word; }

pre, code { font-family: ui-monospace, SFMono-Regular, Consolas, "Courier New", monospace; font-size: 13px; }
pre { background: var(--code-bg); padding: 10px; border-radius: 6px; overflow: auto; margin: 6px 0; white-space: pre-wrap; word-break: break-all; }
pre.patch { white-space: pre; max-height: 70vh; }
.p-add { color: var(--green); }
.p-del { color: var(--red); }
.p-hunk { color: var(--accent); }
.p-meta { color: var(--muted); font-weight: 600; }
pre.token { font-size: 15px; user-select: all; }

.log { max-height: 70vh; overflow-y: auto; background: var(--code-bg); border-radius: 6px; padding: 6px; font-size: 14px; }
.entry { display: flex; gap: 8px; padding: 4px 6px; border-bottom: 1px dashed var(--line); }
.entry .tag { flex: none; font-size: 12px; padding: 0 6px; border-radius: 4px; background: var(--gray-bg); height: fit-content; margin-top: 2px; }
.entry .text { flex: 1; min-width: 0; }
.entry.say .tag { background: var(--blue-bg); color: var(--accent); }
.entry.tool .text, .entry.output .text { font-family: ui-monospace, Consolas, monospace; font-size: 13px; }
.entry.output .text { color: var(--muted); max-height: 16em; overflow: auto; }
.entry.error .tag { background: var(--red-bg); color: var(--red); }
.entry.error .text { color: var(--red); }
.entry.think { opacity: .7; font-style: italic; }
.entry.info { color: var(--muted); font-size: 13px; }

.notice { position: sticky; top: 52px; z-index: 9; text-align: center; padding: 8px; background: var(--blue-bg); }
.toast {
  position: fixed; left: 50%; bottom: 20px; transform: translateX(-50%); z-index: 20; max-width: 90vw;
  padding: 10px 16px; border-radius: 6px; background: var(--text); color: var(--bg);
}
.toast.error { background: var(--red); color: #fff; }

@media (max-width: 640px) {
  body { font-size: 14px; }
  main { padding: 10px; }
  .card { padding: 12px; }
  th, td { padding: 6px 4px; }
  dl.kv { grid-template-columns: 1fr; }
}