/* Layout: one centred column; summary first, then one panel per protocol, each showing the real DNS zone line it was read from. */
:root {
  --bg: #eef3f4;
  --surface: #ffffff;
  --sunk: #f5f8f9;
  --ink: #0f1d26;
  --muted: #566871;
  --line: #d3dee2;
  --accent: #0b6e6c;
  --accent-ink: #ffffff;
  --accent-soft: #dcefee;
  --pass: #1d7a45; --pass-bg: #e2f3e8;
  --warn: #946100; --warn-bg: #fbefd4;
  --fail: #b3261e; --fail-bg: #fbe3e0;
  --info: #3e5d6e; --info-bg: #e5edf1;
  --focus: #0b6e6c;
  --font-display: "Archivo", "Arial Narrow", "Helvetica Neue", Arial, sans-serif;
  --font-body: "IBM Plex Sans", "Segoe UI", system-ui, -apple-system, sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, "SFMono-Regular", Menlo, Consolas, monospace;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #0a141a; --surface: #101d25; --sunk: #0c1820; --ink: #e3ecef; --muted: #8ea2ab; --line: #213440;
    --accent: #45c4bd; --accent-ink: #062022; --accent-soft: #123236;
    --pass: #5fd394; --pass-bg: #123224; --warn: #e9b44c; --warn-bg: #352812;
    --fail: #f28b80; --fail-bg: #3a1916; --info: #9fbccb; --info-bg: #182a34; --focus: #45c4bd;
    color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --bg: #0a141a; --surface: #101d25; --sunk: #0c1820; --ink: #e3ecef; --muted: #8ea2ab; --line: #213440;
  --accent: #45c4bd; --accent-ink: #062022; --accent-soft: #123236;
  --pass: #5fd394; --pass-bg: #123224; --warn: #e9b44c; --warn-bg: #352812;
  --fail: #f28b80; --fail-bg: #3a1916; --info: #9fbccb; --info-bg: #182a34; --focus: #45c4bd;
  color-scheme: dark;
}
* { box-sizing: border-box; }
[hidden] { display: none !important; }
html, body { margin: 0; }
body {
  background: var(--bg); color: var(--ink);
  font-family: var(--font-body); font-size: 15px; line-height: 1.55;
  padding-left: max(16px, env(safe-area-inset-left, 0px));
  padding-right: max(16px, env(safe-area-inset-right, 0px));
  padding-block: 28px 48px;
}
.wrap { max-width: 960px; margin: 0 auto; display: grid; gap: 24px; }
h1, h2, h3 { font-family: var(--font-display); font-stretch: 87%; text-wrap: balance; margin: 0; line-height: 1.15; }
h1 { font-size: clamp(30px, 6vw, 44px); font-weight: 800; letter-spacing: -0.01em; }
h2 { font-size: 22px; font-weight: 800; }
h3 { font-size: 18px; font-weight: 600; }
p { margin: 0; }
code, .mono { font-family: var(--font-mono); font-size: 0.88em; }
a { color: var(--accent); }
:focus-visible { outline: 2px solid var(--focus); outline-offset: 2px; }

.masthead { display: grid; gap: 10px; }
.brand { font-family: var(--font-mono); font-size: 12px; letter-spacing: 0.12em; text-transform: uppercase; color: var(--accent); }
.lede { color: var(--muted); max-width: 62ch; font-size: 16px; }

.tabs { display: flex; flex-wrap: wrap; gap: 4px; padding: 4px; background: var(--surface); border: 1px solid var(--line); border-radius: 10px; width: fit-content; max-width: 100%; }
.tab { font: 500 14px/1 var(--font-body); color: var(--muted); background: transparent; border: 0; border-radius: 7px; padding: 10px 14px; cursor: pointer; }
.tab:hover { color: var(--ink); }
.tab[aria-selected="true"] { background: var(--accent); color: var(--accent-ink); }

.lookup { display: flex; flex-wrap: wrap; gap: 10px; align-items: stretch; }
.field { display: grid; gap: 6px; flex: 1 1 260px; min-width: 0; }
label, .label { font-size: 12px; font-weight: 600; letter-spacing: 0.06em; text-transform: uppercase; color: var(--muted); }
input[type="text"], textarea {
  width: 100%; font: 400 16px/1.4 var(--font-mono); color: var(--ink);
  background: var(--surface); border: 1px solid var(--line); border-radius: 8px; padding: 12px 14px;
}
textarea { font-size: 14px; resize: vertical; min-height: 64px; }
input[type="text"]:focus, textarea:focus { border-color: var(--accent); outline: none; box-shadow: 0 0 0 3px var(--accent-soft); }
.btn { font: 600 15px/1 var(--font-body); background: var(--accent); color: var(--accent-ink); border: 0; border-radius: 8px; padding: 0 22px; min-height: 48px; cursor: pointer; align-self: end; }
.btn:hover { filter: brightness(1.08); }
.btn:disabled { opacity: 0.6; cursor: progress; }
.btn.ghost { background: transparent; color: var(--accent); border: 1px solid var(--line); }
.hint { font-size: 13px; color: var(--muted); }
details.more { font-size: 14px; }
details.more summary { cursor: pointer; color: var(--accent); font-weight: 500; }
details.more[open] summary { margin-bottom: 10px; }

.status { font-size: 14px; color: var(--muted); min-height: 1.5em; font-variant-numeric: tabular-nums; }
.notice { border: 1px solid var(--line); background: var(--surface); border-radius: 10px; padding: 16px 18px; display: grid; gap: 6px; }
.notice.warn { border-color: var(--warn); background: var(--warn-bg); }
.notice.fail { border-color: var(--fail); background: var(--fail-bg); }
.example-tag { display: inline-block; font: 600 11px/1 var(--font-mono); letter-spacing: 0.1em; text-transform: uppercase; color: var(--info); background: var(--info-bg); border-radius: 4px; padding: 5px 7px; }

.results { display: grid; gap: 16px; }
.summary { background: var(--surface); border: 1px solid var(--line); border-radius: 12px; padding: 20px; display: grid; grid-template-columns: auto 1fr; gap: 20px; align-items: center; }
.grade { width: 96px; height: 96px; border-radius: 12px; display: grid; place-items: center; text-align: center; background: var(--sunk); border: 2px solid var(--line); }
.grade b { font: 800 46px/1 var(--font-display); font-stretch: 87%; display: block; }
.grade span { font: 500 12px/1 var(--font-mono); color: var(--muted); font-variant-numeric: tabular-nums; }
.grade.pass { border-color: var(--pass); } .grade.pass b { color: var(--pass); }
.grade.warn { border-color: var(--warn); } .grade.warn b { color: var(--warn); }
.grade.fail { border-color: var(--fail); } .grade.fail b { color: var(--fail); }
.summary-main { display: grid; gap: 10px; min-width: 0; }
.summary-main h2 { overflow-wrap: anywhere; }
.chips { display: flex; flex-wrap: wrap; gap: 8px; }
.chip { display: inline-flex; align-items: center; gap: 8px; font: 500 13px/1 var(--font-body); color: var(--ink); background: var(--sunk); border: 1px solid var(--line); border-radius: 999px; padding: 7px 12px 7px 9px; cursor: pointer; }
.chip:hover { border-color: var(--accent); }
.dot { width: 9px; height: 9px; border-radius: 50%; background: var(--info); flex: none; }
.dot.pass { background: var(--pass); } .dot.warn { background: var(--warn); } .dot.fail { background: var(--fail); } .dot.na { background: var(--pass); }

.panel { background: var(--surface); border: 1px solid var(--line); border-radius: 12px; padding: 20px; display: grid; gap: 14px; min-width: 0; scroll-margin-top: 16px; }
.panel-h { display: flex; justify-content: space-between; align-items: start; gap: 12px; flex-wrap: wrap; }
.panel-h > div { display: grid; gap: 2px; min-width: 0; flex: 1 1 240px; }
.what { color: var(--muted); font-size: 14px; }
.pill { font: 600 12px/1 var(--font-body); letter-spacing: 0.04em; text-transform: uppercase; border-radius: 999px; padding: 6px 10px; white-space: nowrap; color: var(--info); background: var(--info-bg); }
.pill.pass, .pill.na { color: var(--pass); background: var(--pass-bg); }
.pill.warn { color: var(--warn); background: var(--warn-bg); }
.pill.fail { color: var(--fail); background: var(--fail-bg); }

.zone-wrap { display: grid; gap: 6px; min-width: 0; }
.zone { margin: 0; font: 400 13px/1.6 var(--font-mono); background: var(--sunk); border: 1px solid var(--line); border-radius: 8px; padding: 10px 12px; white-space: pre-wrap; overflow-wrap: anywhere; color: var(--ink); }
.zone .zn { color: var(--accent); }
.zone .zt { color: var(--muted); }
.copy { justify-self: start; font: 500 12px/1 var(--font-body); color: var(--accent); background: transparent; border: 1px solid var(--line); border-radius: 6px; padding: 7px 10px; cursor: pointer; }
.copy:hover { border-color: var(--accent); }

.findings { list-style: none; margin: 0; padding: 0; display: grid; gap: 10px; }
.f { display: grid; grid-template-columns: 22px 1fr; gap: 10px; align-items: start; }
.f > div { display: grid; gap: 6px; min-width: 0; }
.sev { width: 22px; height: 22px; border-radius: 50%; display: grid; place-items: center; font: 700 12px/1 var(--font-body); color: var(--info); background: var(--info-bg); margin-top: 1px; }
.f.pass .sev { color: var(--pass); background: var(--pass-bg); }
.f.warn .sev { color: var(--warn); background: var(--warn-bg); }
.f.fail .sev { color: var(--fail); background: var(--fail-bg); }
.fix { color: var(--muted); font-size: 14px; }

.table-wrap { overflow-x: auto; border: 1px solid var(--line); border-radius: 8px; }
table { border-collapse: collapse; width: 100%; font-size: 14px; }
th, td { text-align: left; padding: 9px 12px; border-bottom: 1px solid var(--line); vertical-align: top; }
th { font-size: 12px; font-weight: 600; letter-spacing: 0.05em; text-transform: uppercase; color: var(--muted); background: var(--sunk); white-space: nowrap; }
tr:last-child td { border-bottom: 0; }
td.num, th.num { text-align: right; font-variant-numeric: tabular-nums; }
td code { overflow-wrap: anywhere; }
tr.bad td { background: var(--fail-bg); }

.tree, .tree ul { list-style: none; margin: 0; padding: 0; }
.tree ul { padding-left: 18px; border-left: 1px dashed var(--line); margin-left: 6px; }
.tree li { padding-top: 6px; }
.node { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; font-size: 14px; }
.count { font: 500 12px/1 var(--font-mono); color: var(--muted); }

.paste-grid { display: grid; gap: 14px; }
.row2 { display: grid; grid-template-columns: minmax(0, 220px) minmax(0, 1fr); gap: 14px; }

.drop { border: 2px dashed var(--line); border-radius: 12px; background: var(--surface); padding: 28px 20px; display: grid; gap: 10px; justify-items: center; text-align: center; }
.drop.over { border-color: var(--accent); background: var(--accent-soft); }
.drop, .drop .hint { text-transform: none; letter-spacing: normal; font-weight: 400; }
.drop { color: var(--ink); font-size: 15px; }
.drop h3 { font-size: 20px; }
.drop .btn { font-weight: 600; }
.drop input { position: absolute; width: 1px; height: 1px; opacity: 0; }
.tiles { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 12px; }
.tile { background: var(--surface); border: 1px solid var(--line); border-radius: 10px; padding: 14px 16px; display: grid; gap: 4px; }
.tile b { font: 800 28px/1.1 var(--font-display); font-stretch: 87%; font-variant-numeric: tabular-nums; }
.tile span { font-size: 13px; color: var(--muted); }
.meta { display: flex; flex-wrap: wrap; gap: 6px 18px; font-size: 14px; color: var(--muted); }
.meta b { color: var(--ink); font-weight: 600; }

footer { font-size: 13px; color: var(--muted); border-top: 1px solid var(--line); padding-top: 16px; display: grid; gap: 4px; }

@media (max-width: 640px) {
  .summary { grid-template-columns: 1fr; }
  .tiles { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .row2 { grid-template-columns: 1fr; }
  .btn { width: 100%; }
}
@media (prefers-reduced-motion: no-preference) {
  .panel, .summary { animation: rise .25s ease-out both; }
  @keyframes rise { from { transform: translateY(4px); } to { transform: none; } }
}

.site-nav { display: flex; flex-wrap: wrap; justify-content: space-between; align-items: center; gap: 12px; padding-bottom: 16px; border-bottom: 1px solid var(--line); }
.site-nav .logo { font: 800 22px/1 var(--font-display); font-stretch: 87%; color: var(--ink); text-decoration: none; letter-spacing: -0.01em; }
.site-nav .logo span { color: var(--accent); }
.site-nav ul { list-style: none; display: flex; flex-wrap: wrap; gap: 4px; margin: 0; padding: 0; }
.site-nav a.nl { display: block; padding: 8px 12px; border-radius: 7px; color: var(--muted); text-decoration: none; font-weight: 500; font-size: 14px; }
.site-nav a.nl:hover { color: var(--ink); background: var(--surface); }
.site-nav a.nl[aria-current="page"] { color: var(--accent-ink); background: var(--accent); }
.foot-links { display: flex; flex-wrap: wrap; gap: 6px 16px; }