:root {
  --bg: #f4f5f7; --card: #fff; --text: #1b1d22; --muted: #6b7180; --border: #e2e4ea;
  --accent: #2f6fed; --accent-text: #fff; --ok: #1a8f4c; --err: #c8372d;
}
@media (prefers-color-scheme: dark) {
  :root { --bg: #111317; --card: #1b1e24; --text: #e8eaee; --muted: #9aa0ad; --border: #2c3039; --accent: #5b8ef5; }
}
* { box-sizing: border-box; }
body { margin: 0; font: 16px/1.5 system-ui, -apple-system, "Segoe UI", sans-serif; background: var(--bg); color: var(--text); }
header { display: flex; justify-content: space-between; align-items: center; padding: 12px 16px; background: var(--card); border-bottom: 1px solid var(--border); }
.brand { font-weight: 700; font-size: 18px; color: var(--text); text-decoration: none; }
main { max-width: 860px; margin: 0 auto; padding: 16px; }
.card { background: var(--card); border: 1px solid var(--border); border-radius: 12px; padding: 16px 20px; margin-bottom: 16px; }
.card.narrow { max-width: 380px; margin: 40px auto; }
.center { text-align: center; }
h1 { font-size: 22px; margin: 0 0 8px; } h2 { font-size: 18px; margin: 0 0 8px; }
a { color: var(--accent); }
.muted { color: var(--muted); } .small { font-size: 14px; }
.ok { color: var(--ok); } .err { color: var(--err); }
h3 { font-size: 16px; margin: 16px 0 4px; }
select, input { font: inherit; padding: 10px 12px; border: 1px solid var(--border); border-radius: 8px; background: var(--bg); color: var(--text); width: 100%; }
button, .btn { font: inherit; display: inline-block; padding: 10px 16px; border: 0; border-radius: 8px; background: var(--accent); color: var(--accent-text); cursor: pointer; text-decoration: none; white-space: nowrap; }
button.secondary, .btn.secondary { background: var(--bg); color: var(--text); border: 1px solid var(--border); }
button.danger { background: var(--err); }
button.small, .btn.small { padding: 6px 10px; font-size: 14px; }
button.link { background: none; color: var(--accent); padding: 0; }
.btn.big { display: block; text-align: center; padding: 14px; font-size: 18px; margin: 12px 0; }
.row { display: flex; gap: 8px; align-items: center; margin: 8px 0; }
.row.wrap { flex-wrap: wrap; } .row.center { justify-content: center; }
.row input { flex: 1; }
form { margin: 0; }
table { width: 100%; border-collapse: collapse; margin-top: 12px; }
th, td { text-align: left; padding: 8px 6px; border-bottom: 1px solid var(--border); vertical-align: middle; }
th { font-size: 13px; color: var(--muted); font-weight: 600; }
td.actions { display: flex; gap: 6px; justify-content: flex-end; }
tr.disabled td { opacity: .55; }
code { font-family: ui-monospace, Consolas, monospace; font-size: 14px; background: var(--bg); padding: 2px 6px; border-radius: 6px; }
code.big { font-size: 22px; letter-spacing: 2px; }
.wrap { word-break: break-all; white-space: pre-wrap; }
pre { background: var(--bg); padding: 10px; border-radius: 8px; overflow-x: auto; font-size: 13px; }
.qr { width: 260px; max-width: 100%; image-rendering: pixelated; background: #fff; padding: 8px; border-radius: 8px; }
.qr.small { width: 180px; }
.pills { list-style: none; padding: 0; display: flex; flex-wrap: wrap; gap: 6px; }
.pills li, .tag { font-size: 13px; padding: 2px 10px; border-radius: 999px; border: 1px solid currentColor; }
.code-box { border: 1px dashed var(--accent); border-radius: 10px; padding: 10px 14px; margin: 12px 0; }
details { margin-top: 10px; } summary { cursor: pointer; color: var(--muted); }
@media (max-width: 600px) {
  th:nth-child(2), td:nth-child(2), th:nth-child(3), td:nth-child(3) { display: none; }
  td.actions { flex-direction: column; align-items: stretch; }
}