:root {
  --bg: #f6f7f9; --surface: #ffffff; --text: #16202c; --muted: #5d6b7a; --line: #e2e6ea;
  --brand: #0b5cad; --brand-ink: #ffffff; --ok: #1d7a46; --ok-bg: #e7f5ec; --bad: #b42318; --bad-bg: #fdecea;
  --radius: 10px; --shadow: 0 1px 2px rgba(16,24,40,.06), 0 1px 3px rgba(16,24,40,.08);
  color-scheme: light dark;
}
@media (prefers-color-scheme: dark) {
  :root { --bg: #0f141a; --surface: #161d25; --text: #e6ebf0; --muted: #98a6b5; --line: #26313d;
          --brand: #4ea1ff; --brand-ink: #0b1220; --ok: #5fd08f; --ok-bg: #12301f; --bad: #ff8a80; --bad-bg: #3a1714; }
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body { margin: 0; background: var(--bg); color: var(--text);
       font: 15px/1.55 system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif; }
a { color: var(--brand); }
code, pre { font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; font-size: 13px; }
.wrap { max-width: 1120px; margin: 0 auto; padding: 0 16px; }
.topbar { background: var(--surface); border-bottom: 1px solid var(--line); }
.topbar-inner { display: flex; align-items: center; justify-content: space-between; min-height: 56px; gap: 12px; }
.brand { font-weight: 650; text-decoration: none; color: var(--text); letter-spacing: .1px; }
.brand-mark { color: var(--brand); }
main.wrap { padding-top: 28px; padding-bottom: 28px; }
h1 { font-size: 24px; margin: 0 0 8px; }
h2 { font-size: 17px; margin: 0; }
.intro { margin-bottom: 20px; }
.grid { display: grid; gap: 16px; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); }
.card { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius);
        box-shadow: var(--shadow); padding: 20px; margin-bottom: 16px; overflow-x: auto; }
.card.narrow { max-width: 560px; margin: 40px auto; }
.card-head { display: flex; align-items: center; justify-content: space-between; gap: 8px; margin-bottom: 8px; }
.muted { color: var(--muted); }
.small { font-size: 13px; }
.badge { display: inline-block; padding: 2px 10px; border-radius: 999px; font-size: 12px; font-weight: 600;
         background: var(--bg); color: var(--muted); border: 1px solid var(--line); white-space: nowrap; }
.badge-ok { background: var(--ok-bg); color: var(--ok); border-color: transparent; }
.badge-bad { background: var(--bad-bg); color: var(--bad); border-color: transparent; }
.alert { padding: 10px 14px; border-radius: 8px; margin-top: 12px; }
.alert-ok { background: var(--ok-bg); color: var(--ok); }
.alert-error { background: var(--bad-bg); color: var(--bad); }
.meta { display: grid; grid-template-columns: max-content 1fr; gap: 4px 14px; margin: 12px 0; font-size: 13px; }
.meta dt { color: var(--muted); }
.meta dd { margin: 0; }
details { margin-top: 12px; }
summary { cursor: pointer; font-weight: 600; margin-bottom: 10px; }
.stack { display: grid; gap: 12px; }
label { display: grid; gap: 4px; font-size: 13px; font-weight: 600; }
input[type=text], input[type=password], select {
  width: 100%; padding: 9px 11px; border-radius: 8px; border: 1px solid var(--line);
  background: var(--bg); color: var(--text); font: inherit; font-weight: 400; }
input:focus-visible, select:focus-visible, .btn:focus-visible { outline: 2px solid var(--brand); outline-offset: 2px; }
.btn { display: inline-flex; align-items: center; justify-content: center; padding: 8px 14px; border-radius: 8px;
       border: 1px solid var(--line); background: var(--surface); color: var(--text); font: inherit; font-weight: 600;
       cursor: pointer; text-decoration: none; }
.btn:hover { border-color: var(--muted); }
.btn-primary { background: var(--brand); color: var(--brand-ink); border-color: var(--brand); }
.btn-danger { color: var(--bad); }
.btn-link { border: 0; background: none; color: var(--brand); padding: 4px 8px; }
.btn-small { padding: 4px 10px; font-size: 13px; }
.actions { display: flex; gap: 8px; flex-wrap: wrap; margin-top: 14px; }
form.inline { display: inline-flex; align-items: center; gap: 6px; margin: 0; flex-wrap: wrap; }
.list { padding-left: 18px; }
.table { width: 100%; border-collapse: collapse; }
.table th, .table td { text-align: left; padding: 8px 10px; border-bottom: 1px solid var(--line); vertical-align: top; }
.table th { font-size: 12px; text-transform: uppercase; letter-spacing: .4px; color: var(--muted); }
pre.code { background: var(--bg); border: 1px solid var(--line); border-radius: 8px; padding: 12px; overflow-x: auto;
           white-space: pre; }
.filters { display: flex; gap: 8px; flex-wrap: wrap; margin: 12px 0; }
.filters input { max-width: 220px; }
.footer { padding-bottom: 32px; }
@media (max-width: 640px) { h1 { font-size: 21px; } .card { padding: 16px; } }