:root {
  --bg: #0f1218; --panel: #171c25; --line: #262d3a; --text: #e6e9ef; --muted: #8b94a7;
  --accent: #6aa9ff; --accent-ink: #08111f; --ok: #4cc38a; --warn: #e5b34a; --err: #ef6a6a;
  --mono: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}
@media (prefers-color-scheme: light) {
  :root {
    --bg: #f4f6fa; --panel: #ffffff; --line: #dde2ec; --text: #1a2030; --muted: #667089;
    --accent: #2f6fdb; --accent-ink: #ffffff; --ok: #1f9d63; --warn: #b4801a; --err: #c93838;
  }
}
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--text); font: 15px/1.5 system-ui, sans-serif; }
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
header { display: flex; align-items: center; justify-content: space-between; gap: 1rem; flex-wrap: wrap;
  padding: .8rem 1.2rem; border-bottom: 1px solid var(--line); background: var(--panel); }
.brand { color: var(--text); font-weight: 650; letter-spacing: .02em; display: flex; align-items: center; gap: .55rem; }
.dot { width: .7rem; height: .7rem; border-radius: 50%; background: var(--accent); box-shadow: 0 0 .8rem var(--accent); }
nav { display: flex; align-items: center; gap: 1rem; flex-wrap: wrap; }
main { max-width: 1000px; margin: 0 auto; padding: 1.2rem; }
h1 { font-size: 1.4rem; margin: .2rem 0 .6rem; }
h2 { font-size: 1rem; margin: 0 0 .8rem; }
h3 { font-size: .9rem; margin: 1.2rem 0 .5rem; color: var(--muted); }
.head { display: flex; align-items: baseline; gap: .8rem; margin-bottom: .6rem; }
.card { background: var(--panel); border: 1px solid var(--line); border-radius: 10px; padding: 1rem 1.1rem; margin-bottom: 1rem; overflow-x: auto; }
.narrow { max-width: 420px; margin: 2rem auto; }
.center { text-align: center; }
.muted { color: var(--muted); font-weight: 400; }
.small { font-size: .85rem; }
.mono, input, select { font-family: var(--mono); }
.nowrap { white-space: nowrap; }
table { width: 100%; border-collapse: collapse; }
th { text-align: left; font-size: .75rem; text-transform: uppercase; letter-spacing: .06em; color: var(--muted); font-weight: 600; }
th, td { padding: .45rem .5rem; border-bottom: 1px solid var(--line); vertical-align: middle; }
tr:last-child td { border-bottom: none; }
.num { text-align: right; }
.d1 { padding-left: 1.6rem; } .d2 { padding-left: 2.6rem; } .d3 { padding-left: 3.6rem; }
.d4 { padding-left: 4.6rem; } .d5 { padding-left: 5.6rem; } .d6 { padding-left: 6.6rem; }
.pill { font-size: .72rem; padding: .1rem .55rem; border: 1px solid var(--line); border-radius: 99px; color: var(--muted); }
.t { font-family: var(--mono); font-size: .75rem; padding: .1rem .45rem; border-radius: 5px; background: var(--bg); border: 1px solid var(--line); }
.tA, .tAAAA { color: var(--accent); } .tCNAME { color: var(--warn); } .tTXT { color: var(--ok); } .tMX { color: var(--err); }
input, select { background: var(--bg); color: var(--text); border: 1px solid var(--line); border-radius: 7px; padding: .4rem .55rem; font-size: .9rem; max-width: 100%; }
input:focus, select:focus { outline: 2px solid var(--accent); outline-offset: -1px; }
label { display: flex; flex-direction: column; gap: .25rem; font-size: .75rem; color: var(--muted); }
label.check { flex-direction: row; align-items: center; gap: .4rem; font-size: .9rem; color: var(--text); }
label.grow { flex: 1 1 14rem; } label.grow input { width: 100%; }
label.small input { width: 5.5rem; }
.val { width: 100%; min-width: 12rem; } .pref { width: 4.5rem; margin-left: .3rem; }
.fqdn { display: flex; align-items: center; gap: .1rem; color: var(--text); }
.fqdn input { width: 9rem; } .fqdn b { font: 600 .9rem var(--mono); color: var(--muted); }
.row { display: flex; gap: .8rem; align-items: flex-end; flex-wrap: wrap; margin-top: .4rem; }
.row.end { justify-content: space-between; align-items: center; margin-top: 1rem; }
.stack { display: flex; flex-direction: column; gap: .8rem; }
.stack input { width: 100%; }
.inline { display: inline; margin: 0; }
.act { white-space: nowrap; text-align: right; }
.btn { background: var(--accent); color: var(--accent-ink); border: 0; border-radius: 7px; padding: .42rem .9rem; font: 600 .85rem system-ui, sans-serif; cursor: pointer; }
.btn:hover { filter: brightness(1.1); }
.btn.ghost { background: transparent; color: var(--accent); border: 1px solid var(--line); }
.btn.danger { background: transparent; color: var(--err); border: 1px solid var(--line); }
.btn.small { padding: .1rem .5rem; }
button.link { background: none; border: 0; color: var(--accent); cursor: pointer; font: inherit; padding: 0; }
ul.plain { list-style: none; padding: 0; margin: 0 0 .8rem; }
ul.plain li { padding: .25rem 0; display: flex; gap: .8rem; align-items: center; }
.flash { padding: .6rem .9rem; border-radius: 8px; margin-bottom: .8rem; border: 1px solid var(--line); background: var(--panel); }
.flash.ok { border-color: var(--ok); } .flash.error { border-color: var(--err); color: var(--err); } .flash.warn { border-color: var(--warn); color: var(--warn); }