:root {
  --bg: #f6f7f9; --panel: #fff; --ink: #1c2330; --muted: #5b6678; --line: #dfe3ea;
  --accent: #0a5bd3; --accent-ink: #fff; --ok-bg: #e7f6ec; --ok-ink: #19613a;
  --err-bg: #fdecec; --err-ink: #9b1c1c; --warn-bg: #fff6e0; --warn-ink: #7a5300; --chip: #eef1f6;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #11151c; --panel: #1a2029; --ink: #e6e9ef; --muted: #9aa4b5; --line: #2c3441;
    --accent: #4d8ff0; --accent-ink: #0b1220; --ok-bg: #143322; --ok-ink: #8fe0b0;
    --err-bg: #3a1717; --err-ink: #f5a3a3; --warn-bg: #3a2e10; --warn-ink: #f0d080; --chip: #252c38;
  }
}
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--ink); font: 15px/1.5 system-ui, -apple-system, "Segoe UI", sans-serif; }
a { color: var(--accent); }
header.top { background: var(--panel); border-bottom: 1px solid var(--line); }
header.top .inner { max-width: 1100px; margin: 0 auto; padding: 10px 16px; display: flex; gap: 18px; align-items: center; flex-wrap: wrap; }
header.top .brand { font-weight: 650; text-decoration: none; color: var(--ink); margin-right: 8px; }
header.top nav { display: flex; gap: 14px; flex-wrap: wrap; flex: 1; }
header.top nav a { color: var(--muted); text-decoration: none; }
header.top nav a.on, header.top nav a:hover { color: var(--ink); }
header.top .who { color: var(--muted); font-size: 13px; display: flex; gap: 10px; align-items: center; }
main { max-width: 1100px; margin: 0 auto; padding: 20px 16px 60px; }
main.narrow { max-width: 460px; padding-top: 8vh; }
h1 { font-size: 22px; margin: 0 0 14px; }
h2 { font-size: 17px; margin: 22px 0 10px; }
.panel { background: var(--panel); border: 1px solid var(--line); border-radius: 10px; padding: 16px; margin-bottom: 16px; }
.muted { color: var(--muted); }
.small { font-size: 13px; }
.flash { padding: 10px 12px; border-radius: 8px; margin-bottom: 12px; }
.flash.ok { background: var(--ok-bg); color: var(--ok-ink); }
.flash.error { background: var(--err-bg); color: var(--err-ink); }
.warn { background: var(--warn-bg); color: var(--warn-ink); padding: 10px 12px; border-radius: 8px; }
table { width: 100%; border-collapse: collapse; }
th, td { text-align: left; padding: 8px 6px; border-bottom: 1px solid var(--line); vertical-align: top; }
th { font-size: 12px; text-transform: uppercase; letter-spacing: .03em; color: var(--muted); font-weight: 600; }
.tablewrap { overflow-x: auto; }
label { display: block; font-size: 13px; color: var(--muted); margin: 10px 0 4px; }
input[type=text], input[type=email], input[type=password], input[type=number], select, textarea {
  width: 100%; padding: 8px 10px; border: 1px solid var(--line); border-radius: 7px; background: var(--bg); color: var(--ink); font: inherit; }
input[type=checkbox] { width: auto; }
.check { display: flex; gap: 8px; align-items: center; color: var(--ink); font-size: 14px; }
.row { display: flex; gap: 12px; flex-wrap: wrap; align-items: end; }
.row > * { flex: 1 1 160px; }
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 8px; padding: 8px 14px; border-radius: 7px;
  border: 1px solid var(--line); background: var(--panel); color: var(--ink); font: inherit; cursor: pointer; text-decoration: none; }
.btn.primary { background: var(--accent); border-color: var(--accent); color: var(--accent-ink); }
.btn.danger { color: var(--err-ink); }
.btn.block { width: 100%; margin-top: 10px; }
.btn.sm { padding: 4px 10px; font-size: 13px; }
form.inline { display: inline; }
.chip { display: inline-block; padding: 1px 8px; border-radius: 99px; background: var(--chip); font-size: 12px; color: var(--muted); }
.chip.ok { background: var(--ok-bg); color: var(--ok-ink); }
.chip.bad { background: var(--err-bg); color: var(--err-ink); }
.chip.warn { background: var(--warn-bg); color: var(--warn-ink); }
.divider { text-align: center; color: var(--muted); font-size: 13px; margin: 16px 0; }
.grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 12px; }
.stat { font-size: 26px; font-weight: 650; }
.qr { background: #fff; padding: 8px; border-radius: 8px; width: 190px; }
code, .mono { font-family: ui-monospace, SFMono-Regular, Menlo, monospace; font-size: 13px; }
details summary { cursor: pointer; color: var(--accent); }
@media (max-width: 640px) { header.top .who { width: 100%; } th:nth-child(n+4), td:nth-child(n+4) { display: none; } }
.row.mid { align-items: center; }
.row > .grow3 { flex: 3 1 200px; }
.row > .grow2 { flex: 2 1 220px; }
.row > .fixed { flex: 0 0 auto; }