:root {
  color-scheme: light dark;
  --bg: #f4f5f7; --card: #ffffff; --text: #16181d; --muted: #5d6270; --line: #dfe2e8;
  --brand: #2563eb; --brand-text: #ffffff; --ok: #15803d; --warn: #b45309; --err: #b91c1c; --chip: #eef0f4;
}
@media (prefers-color-scheme: dark) {
  :root { --bg: #0f1115; --card: #171a21; --text: #e8e8ea; --muted: #a0a4ae; --line: #2a2f3a; --brand: #3b82f6; --ok: #22c55e; --warn: #f59e0b; --err: #f87171; --chip: #222733; }
}
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--text); font: 15px/1.5 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif; }
a { color: var(--brand); }
.center { text-align: center; margin-top: 20vh; }
.muted { color: var(--muted); }
.small { font-size: 13px; }
header.top { display: flex; align-items: center; gap: 12px; padding: 10px 16px; background: var(--card); border-bottom: 1px solid var(--line); flex-wrap: wrap; }
header.top img { width: 28px; height: 28px; }
header.top .title { font-weight: 600; }
header.top .grow { flex: 1; }
main.page { max-width: 1100px; margin: 0 auto; padding: 16px; }
.card { background: var(--card); border: 1px solid var(--line); border-radius: 10px; padding: 16px; margin-bottom: 16px; }
.login { max-width: 380px; margin: 12vh auto 0; padding: 0 16px; }
.login .card { padding: 24px; }
.login h1 { font-size: 20px; margin: 8px 0 4px; text-align: center; }
.login .logo { display: block; margin: 0 auto; width: 48px; height: 48px; }
label { display: block; font-size: 13px; font-weight: 600; margin: 12px 0 4px; }
input, select { width: 100%; padding: 9px 10px; border: 1px solid var(--line); border-radius: 8px; background: var(--bg); color: var(--text); font: inherit; }
input:focus, select:focus { outline: 2px solid var(--brand); outline-offset: -1px; }
button { font: inherit; border: 1px solid var(--line); background: var(--card); color: var(--text); border-radius: 8px; padding: 8px 14px; cursor: pointer; }
button.primary { background: var(--brand); border-color: var(--brand); color: var(--brand-text); }
button.danger { color: var(--err); }
button:disabled { opacity: .55; cursor: default; }
.full { width: 100%; margin-top: 16px; }
.link { background: none; border: none; color: var(--brand); padding: 0; margin-top: 12px; }
.err { color: var(--err); font-size: 14px; margin-top: 10px; }
.okmsg { color: var(--ok); font-size: 14px; margin-top: 10px; }
.row { display: flex; gap: 8px; align-items: center; flex-wrap: wrap; }
.row .grow { flex: 1; }
.grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 0 16px; }
h2 { font-size: 18px; margin: 0 0 12px; }
h3 { font-size: 15px; margin: 0 0 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; color: var(--muted); font-weight: 600; text-transform: uppercase; letter-spacing: .02em; }
tr.click { cursor: pointer; }
tr.click:hover td { background: var(--chip); }
.badge { display: inline-block; padding: 1px 8px; border-radius: 999px; font-size: 12px; font-weight: 600; background: var(--chip); }
.badge.ok { color: var(--ok); } .badge.warn { color: var(--warn); } .badge.err { color: var(--err); }
.dot { display: inline-block; width: 8px; height: 8px; border-radius: 50%; margin-right: 6px; background: var(--muted); }
.dot.ok { background: var(--ok); } .dot.err { background: var(--err); } .dot.warn { background: var(--warn); }
.dns { font-family: ui-monospace, Menlo, Consolas, monospace; background: var(--chip); border-radius: 8px; padding: 10px 12px; }
.table-wrap { overflow-x: auto; }
.code-input { letter-spacing: .4em; text-align: center; font-size: 20px; }
@media (max-width: 640px) {
  .hide-sm { display: none; }
  main.page { padding: 12px; }
}