:root {
  --bg: #f6f7f9;
  --card: #fff;
  --ink: #1c2430;
  --muted: #5d6b7c;
  --line: #dde3ea;
  --accent: #1f4e79;
  --ok: #1b7f45;
  --warn: #9a6400;
  --bad: #b3261e;
  --chip: #eef2f6;
  color-scheme: light dark;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #12161c;
    --card: #1a2029;
    --ink: #e6ebf1;
    --muted: #9aa8b8;
    --line: #2c3542;
    --accent: #7fb2e5;
    --ok: #5cc98a;
    --warn: #e2b04a;
    --bad: #f08a83;
    --chip: #232c38;
  }
}
* { box-sizing: border-box; }
html, body { margin: 0; background: var(--bg); color: var(--ink); }
body {
  font: 16px/1.45 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}
a { color: var(--accent); }
.top {
  display: flex; flex-wrap: wrap; align-items: center; gap: 8px 16px;
  padding: 10px 16px; background: var(--card); border-bottom: 1px solid var(--line);
  position: sticky; top: 0; z-index: 2;
}
.brand { font-weight: 700; text-decoration: none; color: var(--ink); }
nav { display: flex; flex-wrap: wrap; gap: 4px; }
nav a {
  text-decoration: none; padding: 4px 10px; border-radius: 999px; color: var(--muted);
}
nav a.active { background: var(--chip); color: var(--ink); }
main { width: 100%; max-width: 880px; margin: 0 auto; padding: 16px; flex: 1; outline: none; }
.foot {
  display: flex; justify-content: space-between; gap: 12px; flex-wrap: wrap;
  padding: 10px 16px; color: var(--muted); font-size: 14px; border-top: 1px solid var(--line);
}
h1 { font-size: 1.4rem; margin: 0.2rem 0 1rem; }
h2 { font-size: 1.1rem; margin: 1.4rem 0 0.6rem; }
.card { background: var(--card); border: 1px solid var(--line); border-radius: 10px; padding: 14px 16px; margin: 0 0 12px; }
.muted { color: var(--muted); }
.small { font-size: 14px; }
.row { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; }
.grow { flex: 1; min-width: 0; }
.stack > * + * { margin-top: 10px; }
label { display: block; font-size: 14px; color: var(--muted); margin-bottom: 4px; }
input, select, textarea, button {
  font: inherit; color: inherit; border-radius: 8px; border: 1px solid var(--line);
  background: var(--card); padding: 8px 10px;
}
input, select, textarea { width: 100%; }
textarea { min-height: 3.2em; resize: vertical; }
button { cursor: pointer; background: var(--chip); }
button.primary { background: var(--accent); color: #fff; border-color: var(--accent); }
button.danger { color: var(--bad); }
button:disabled { opacity: 0.6; cursor: default; }
.err { color: var(--bad); }
.okc { color: var(--ok); }
.chip {
  display: inline-block; font-size: 12px; padding: 1px 8px; border-radius: 999px;
  background: var(--chip); color: var(--muted); white-space: nowrap;
}
.chip.expected { color: var(--warn); }
.chip.waiting { color: var(--accent); }
.chip.overdue { background: var(--bad); color: #fff; }
.chip.confirmed, .chip.done { color: var(--ok); }
.chip.cancelled { text-decoration: line-through; }
.chip.high { color: var(--bad); }
ul.items { list-style: none; margin: 0; padding: 0; }
ul.items > li { border-top: 1px solid var(--line); padding: 10px 0; }
ul.items > li:first-child { border-top: 0; }
.when { font-variant-numeric: tabular-nums; color: var(--muted); min-width: 4.5em; }
.title { font-weight: 600; }
.refs { font-size: 13px; color: var(--muted); }
.fix { margin-top: 8px; display: grid; gap: 8px; grid-template-columns: repeat(auto-fit, minmax(160px, 1fr)); }
.chat { display: flex; flex-direction: column; gap: 10px; }
.msg { padding: 10px 12px; border-radius: 12px; max-width: 90%; white-space: pre-wrap; overflow-wrap: anywhere; }
.msg.me { align-self: flex-end; background: var(--accent); color: #fff; }
.msg.ai { align-self: flex-start; background: var(--card); border: 1px solid var(--line); }
pre.box { white-space: pre-wrap; overflow-wrap: anywhere; background: var(--chip); padding: 10px; border-radius: 8px; font-size: 14px; }
.mono { font-family: ui-monospace, SFMono-Regular, Menlo, monospace; font-size: 13px; overflow-wrap: anywhere; }
ul.checks { list-style: none; padding: 0; margin: 0; }
ul.checks li { padding: 4px 0; }
ul.checks li::before { content: "\2713  "; color: var(--ok); }
ul.checks li.fail::before { content: "\2717  "; color: var(--bad); }
table { width: 100%; border-collapse: collapse; }
td, th { text-align: left; padding: 6px 4px; border-top: 1px solid var(--line); vertical-align: top; }
.token { font: 600 1.2rem ui-monospace, Menlo, monospace; letter-spacing: 0.05em; }
@media (max-width: 520px) {
  main { padding: 12px; }
  .msg { max-width: 100%; }
}