:root {
  color-scheme: light dark;
  --bg: #fbfaf8;
  --fg: #1f2328;
  --muted: #5f6670;
  --line: #d9d6d0;
  --card: #ffffff;
  --accent: #2f5d8a;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #16181b;
    --fg: #ececea;
    --muted: #a5abb3;
    --line: #33373d;
    --card: #1f2226;
    --accent: #8ab4dc;
  }
}
* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font: 16px/1.5 system-ui, -apple-system, "Segoe UI", sans-serif;
}
header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 16px;
  border-bottom: 1px solid var(--line);
}
h1 { font-size: 18px; margin: 0; }
h2 { font-size: 16px; margin: 0 0 4px; }
main { max-width: 640px; margin: 0 auto; padding: 16px; }
[hidden] { display: none !important; }
button {
  min-height: 44px;
  padding: 8px 16px;
  border: 1px solid var(--accent);
  border-radius: 6px;
  background: var(--accent);
  color: var(--bg);
  font: inherit;
}
button:disabled { opacity: 0.5; }
#signout { background: transparent; color: var(--accent); }
form { display: grid; gap: 12px; margin-top: 12px; }
label { display: grid; gap: 4px; }
input {
  min-height: 44px;
  padding: 8px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--card);
  color: var(--fg);
  font: inherit;
}
details { margin-top: 24px; }
#message:empty { display: none; }
.note { color: var(--muted); font-size: 14px; margin: 0 0 12px; }
ul { list-style: none; margin: 0; padding: 0; display: grid; gap: 8px; }
li { padding: 12px; border: 1px solid var(--line); border-radius: 6px; background: var(--card); }
.name { font-weight: 600; }
.status, .detail { color: var(--muted); font-size: 14px; }