:root {
  --bg: #f6f7f9; --fg: #14181f; --muted: #5d6673; --card: #ffffff; --line: #dde1e6;
  --accent: #2f6fde; --red: #c62828; --green: #2e7d32; --amber: #b26a00;
  color-scheme: light dark;
}
@media (prefers-color-scheme: dark) {
  :root { --bg: #0f1419; --fg: #e6e9ee; --muted: #8b95a3; --card: #171d24; --line: #2a323c; --accent: #5b93f0; --red: #ef5350; --green: #66bb6a; --amber: #ffb74d; }
}
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--fg); font: 16px/1.45 system-ui, -apple-system, "Segoe UI", sans-serif; }
header { display: flex; justify-content: space-between; align-items: center; padding: calc(12px + env(safe-area-inset-top)) 16px 12px; border-bottom: 1px solid var(--line); }
.brand { font-weight: 700; color: var(--fg); text-decoration: none; }
#who { color: var(--muted); font-size: 14px; }
main { max-width: 720px; margin: 0 auto; padding: 16px; }
h2 { font-size: 15px; text-transform: uppercase; letter-spacing: .04em; color: var(--muted); margin: 24px 0 8px; }
.card { background: var(--card); border: 1px solid var(--line); border-radius: 10px; padding: 14px; margin-bottom: 10px; }
a.card { display: block; color: inherit; text-decoration: none; }
.row { display: flex; gap: 8px; align-items: center; flex-wrap: wrap; }
.muted { color: var(--muted); }
.small { font-size: 14px; }
.pill { font-size: 12px; font-weight: 700; padding: 2px 8px; border-radius: 999px; border: 1px solid currentColor; }
.open { color: var(--red); } .resolved { color: var(--green); } .acked { color: var(--amber); }
.alias { font-weight: 600; word-break: break-all; }
button, input { font: inherit; }
button { background: var(--accent); color: #fff; border: 0; border-radius: 8px; padding: 10px 16px; cursor: pointer; }
button.secondary { background: transparent; color: var(--accent); border: 1px solid var(--accent); }
button:disabled { opacity: .5; cursor: default; }
input { width: 100%; margin-bottom: 10px; padding: 12px; border: 1px solid var(--line); border-radius: 8px; background: var(--card); color: var(--fg); font-size: 20px; letter-spacing: .12em; text-transform: uppercase; }
.error { color: var(--red); }
ol.events { padding-left: 20px; margin: 0; }
a.button { display: inline-block; background: var(--accent); color: #fff; border-radius: 8px; padding: 10px 16px; text-decoration: none; }
button.link { background: none; color: var(--accent); padding: 0 0 0 10px; font-size: 14px; }
input.plain { font-size: 16px; letter-spacing: normal; text-transform: none; }
.code { font: 700 28px/1.2 ui-monospace, monospace; letter-spacing: .12em; margin: 12px 0 4px; }
.between { justify-content: space-between; }
ul.devices { list-style: none; padding: 0; margin: 0 0 12px; display: flex; flex-direction: column; gap: 8px; }