:root {
  color-scheme: light dark;
  --bg: #f6f7f9; --card: #fff; --fg: #1b1f24; --muted: #5d6670; --line: #d9dee3;
  --accent: #128c4a; --accent-fg: #fff; --danger: #c62828; --ok: #1a7f37; --warn-bg: #fff6e0;
}
@media (prefers-color-scheme: dark) {
  :root { --bg: #111417; --card: #1a1e22; --fg: #e8eaed; --muted: #9aa3ab; --line: #2c3238;
          --accent: #25a35a; --danger: #ef5350; --ok: #4caf50; --warn-bg: #3a2f12; }
}
* { box-sizing: border-box; }
body { margin: 0; font: 16px/1.5 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif; background: var(--bg); color: var(--fg); }
header { background: var(--card); border-bottom: 1px solid var(--line); }
header .bar { max-width: 46rem; margin: 0 auto; padding: .75rem 1rem; display: flex; gap: 1rem; align-items: center; flex-wrap: wrap; }
header .brand { font-weight: 700; margin-right: auto; color: var(--fg); text-decoration: none; }
header nav { display: flex; gap: .75rem; align-items: center; flex-wrap: wrap; }
header nav a { color: var(--muted); text-decoration: none; }
header nav a:hover { color: var(--fg); }
main { max-width: 46rem; margin: 1.5rem auto; padding: 0 1rem; }
.card { background: var(--card); border: 1px solid var(--line); border-radius: 10px; padding: 1.25rem; margin-bottom: 1.25rem; }
.card.narrow { max-width: 26rem; margin-left: auto; margin-right: auto; }
h1 { font-size: 1.4rem; margin: 0 0 1rem; }
h2 { font-size: 1.1rem; margin: 0 0 .75rem; }
p { margin: .5rem 0; }
.muted, small { color: var(--muted); }
label { display: block; font-weight: 600; margin: .75rem 0 .25rem; }
label.inline { display: flex; gap: .5rem; align-items: center; font-weight: 400; }
input[type=email], input[type=password], input[type=text], input[type=number], input[type=tel] {
  width: 100%; padding: .55rem .65rem; font: inherit; color: inherit; background: var(--bg);
  border: 1px solid var(--line); border-radius: 6px; }
button, .button { display: inline-block; margin-top: 1rem; padding: .55rem 1rem; font: inherit; font-weight: 600;
  border: 0; border-radius: 6px; background: var(--accent); color: var(--accent-fg); cursor: pointer; text-decoration: none; }
button.secondary, .button.secondary { background: transparent; color: var(--fg); border: 1px solid var(--line); }
button.danger { background: var(--danger); color: #fff; }
button.small { margin: 0; padding: .3rem .6rem; font-size: .9rem; }
form.inline { display: inline; }
.row { display: flex; gap: .5rem; flex-wrap: wrap; align-items: center; }
.msg { padding: .65rem .85rem; border-radius: 6px; margin-bottom: 1rem; border: 1px solid var(--line); }
.msg.error { border-color: var(--danger); color: var(--danger); }
.msg.ok { border-color: var(--ok); color: var(--ok); }
.msg.warn { background: var(--warn-bg); }
.ok { color: var(--ok); } .err { color: var(--danger); }
.qr { text-align: center; }
.qr img { width: 100%; max-width: 300px; image-rendering: pixelated; background: #fff; padding: 12px; border-radius: 8px; }
.code { font: 700 1.8rem/1.2 ui-monospace, monospace; letter-spacing: .15em; text-align: center; margin: 1rem 0; }
code, .mono { font-family: ui-monospace, SFMono-Regular, Menlo, monospace; font-size: .9em; word-break: break-all; }
table { width: 100%; border-collapse: collapse; font-size: .95rem; }
th, td { text-align: left; padding: .45rem .35rem; border-bottom: 1px solid var(--line); vertical-align: top; }
th { color: var(--muted); font-weight: 600; }
.table-wrap { overflow-x: auto; }
.badge { display: inline-block; font-size: .75rem; padding: .05rem .45rem; border-radius: 999px; border: 1px solid var(--line); color: var(--muted); }
details summary { cursor: pointer; font-weight: 600; }