:root { color-scheme: light dark; --bg: #f5f5f2; --card: #fff; --text: #1c1c1a; --muted: #6b6b66;
  --line: #deded8; --accent: #2f5d50; --accent-text: #fff; --error: #b3261e; }
@media (prefers-color-scheme: dark) { :root { --bg: #161615; --card: #20201e; --text: #ecece8;
  --muted: #9a9a94; --line: #34342f; --accent: #7fbfaa; --accent-text: #10201b; --error: #f2b8b5; } }
* { box-sizing: border-box; }
body { margin: 0; padding: 24px 16px 48px; background: var(--bg); color: var(--text);
  font: 16px/1.5 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif; }
main { max-width: 560px; margin: 0 auto; }
h1 { font-size: 24px; margin: 0 0 4px; }
h2 { font-size: 18px; margin: 0 0 12px; }
p { margin: 0 0 12px; }
.muted { color: var(--muted); }
.card { background: var(--card); border: 1px solid var(--line); border-radius: 12px;
  padding: 20px; margin-top: 16px; }
.login { margin-top: 18vh; text-align: center; }
label { display: block; margin-bottom: 8px; color: var(--muted); }
input[type=text] { width: 100%; padding: 12px; font: inherit; color: inherit; background: var(--bg);
  border: 1px solid var(--line); border-radius: 8px; }
.login input[type=text] { text-align: center; letter-spacing: 0.08em; text-transform: uppercase; }
button, .button { display: inline-block; padding: 11px 18px; font: inherit; font-weight: 600;
  color: var(--accent-text); background: var(--accent); border: 0; border-radius: 8px;
  cursor: pointer; text-decoration: none; }
button.plain { color: var(--muted); background: none; padding: 0; font-weight: 400;
  text-decoration: underline; }
.login button { width: 100%; margin-top: 12px; }
.error { color: var(--error); margin-top: 12px; }
.banner { border: 1px dashed var(--error); color: var(--error); border-radius: 8px;
  padding: 10px 14px; margin-top: 16px; }
.top { display: flex; justify-content: space-between; align-items: baseline; gap: 12px; }
ol { margin: 0; padding-left: 22px; }
li { margin-bottom: 8px; }
a { color: var(--accent); }
.qr { background: #fff; border-radius: 8px; padding: 8px; margin: 12px auto; max-width: 320px; }
.qr svg { display: block; width: 100%; height: auto; }
.actions { display: flex; flex-wrap: wrap; gap: 10px; align-items: center; }
details { margin-top: 14px; }
summary { cursor: pointer; color: var(--accent); }
pre { background: var(--bg); border: 1px solid var(--line); border-radius: 8px; padding: 12px;
  font-size: 12px; overflow-x: auto; white-space: pre-wrap; word-break: break-all; }
.add { display: flex; gap: 10px; }
.add input { flex: 1; min-width: 0; }