/* DNS Toolbox — light/dark theme, no external dependencies */
:root {
  --bg: #f6f8fa;
  --surface: #ffffff;
  --surface-2: #f0f3f6;
  --border: #dde3ea;
  --text: #17202b;
  --text-2: #4a5666;
  --text-3: #6b7685;
  --accent: #0b7a75;
  --accent-hover: #086560;
  --accent-soft: #e2f4f2;
  --accent-text: #ffffff;
  --ok: #157f3b;
  --ok-soft: #e5f5ea;
  --warn: #9a5b00;
  --warn-soft: #fff4dc;
  --bad: #b42318;
  --bad-soft: #fde8e6;
  --muted-soft: #eef1f4;
  --shadow: 0 1px 2px rgba(16, 24, 40, .05), 0 4px 16px rgba(16, 24, 40, .06);
  --radius: 14px;
  --radius-sm: 8px;
  --font: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --mono: ui-monospace, "SFMono-Regular", "Cascadia Mono", Menlo, Consolas, monospace;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #0d1117; --surface: #151b23; --surface-2: #1c2430; --border: #2a3441;
    --text: #e6edf3; --text-2: #b1bac4; --text-3: #8b949e;
    --accent: #3dd6c6; --accent-hover: #6ae3d6; --accent-soft: #0f2f2d; --accent-text: #06201e;
    --ok: #4ade80; --ok-soft: #0f2a1a; --warn: #fbbf24; --warn-soft: #2d230b;
    --bad: #f87171; --bad-soft: #3a1414; --muted-soft: #1f2732;
    --shadow: 0 1px 2px rgba(0,0,0,.3), 0 4px 16px rgba(0,0,0,.25);
    color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --bg: #0d1117; --surface: #151b23; --surface-2: #1c2430; --border: #2a3441;
  --text: #e6edf3; --text-2: #b1bac4; --text-3: #8b949e;
  --accent: #3dd6c6; --accent-hover: #6ae3d6; --accent-soft: #0f2f2d; --accent-text: #06201e;
  --ok: #4ade80; --ok-soft: #0f2a1a; --warn: #fbbf24; --warn-soft: #2d230b;
  --bad: #f87171; --bad-soft: #3a1414; --muted-soft: #1f2732;
  --shadow: 0 1px 2px rgba(0,0,0,.3), 0 4px 16px rgba(0,0,0,.25);
  color-scheme: dark;
}

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0; background: var(--bg); color: var(--text); font: 16px/1.6 var(--font);
  min-height: 100vh; display: flex; flex-direction: column;
}
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
img, svg { max-width: 100%; }
code, pre, .mono { font-family: var(--mono); font-size: .92em; }
h1, h2, h3 { line-height: 1.25; margin: 0 0 .5em; letter-spacing: -.01em; }
h1 { font-size: clamp(1.7rem, 3.2vw, 2.4rem); }
h2 { font-size: 1.35rem; }
h3 { font-size: 1.05rem; }
p { margin: 0 0 1em; }
.container { width: 100%; max-width: 1180px; margin: 0 auto; padding: 0 16px; }
.skip { position: absolute; left: -999px; }
.skip:focus { left: 16px; top: 8px; background: var(--surface); padding: 8px 12px; z-index: 100; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }

/* Header */
.site-header {
  position: sticky; top: 0; z-index: 50; background: color-mix(in srgb, var(--surface) 88%, transparent);
  backdrop-filter: saturate(1.4) blur(10px); border-bottom: 1px solid var(--border);
}
.nav { display: flex; align-items: center; gap: 12px; height: 64px; }
.brand { display: flex; align-items: center; gap: 10px; color: var(--text); font-weight: 700; font-size: 1.12rem; }
.brand:hover { text-decoration: none; }
.brand svg { width: 34px; height: 34px; flex: none; }
.brand b { color: var(--accent); }
.nav-links { display: flex; align-items: center; gap: 4px; margin-left: auto; }
.nav-group { position: relative; }
.nav-btn, .nav-link {
  display: inline-flex; align-items: center; gap: 6px; padding: 8px 12px; border-radius: var(--radius-sm);
  color: var(--text-2); background: none; border: 0; font: inherit; font-weight: 550; cursor: pointer;
}
.nav-btn:hover, .nav-link:hover, .nav-group:focus-within .nav-btn { background: var(--surface-2); color: var(--text); text-decoration: none; }
.nav-btn svg { width: 14px; height: 14px; transition: transform .15s; }
.menu {
  position: absolute; top: calc(100% + 6px); right: 0; min-width: 300px; background: var(--surface);
  border: 1px solid var(--border); border-radius: var(--radius); box-shadow: var(--shadow); padding: 8px;
  display: none;
}
.nav-group:hover .menu, .nav-group:focus-within .menu, .nav-group.open .menu { display: block; }
.menu a { display: flex; gap: 12px; padding: 10px; border-radius: var(--radius-sm); color: var(--text); }
.menu a:hover { background: var(--surface-2); text-decoration: none; }
.menu a small { display: block; color: var(--text-3); font-size: .84rem; line-height: 1.35; }
.menu .ico { width: 34px; height: 34px; flex: none; }
.theme-toggle {
  width: 40px; height: 40px; border-radius: 50%; border: 1px solid var(--border); background: var(--surface);
  color: var(--text-2); display: inline-grid; place-items: center; cursor: pointer; margin-left: 6px;
}
.theme-toggle:hover { color: var(--text); background: var(--surface-2); }
.theme-toggle svg { width: 18px; height: 18px; }
.theme-toggle .sun { display: none; }
:root[data-theme="dark"] .theme-toggle .sun { display: block; }
:root[data-theme="dark"] .theme-toggle .moon { display: none; }
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) .theme-toggle .sun { display: block; }
  :root:not([data-theme="light"]) .theme-toggle .moon { display: none; }
}
.menu-toggle { display: none; }
@media (max-width: 760px) {
  .menu-toggle { display: inline-grid; margin-left: auto; }
  .nav-links {
    display: none; position: absolute; top: 64px; left: 0; right: 0; flex-direction: column; align-items: stretch;
    background: var(--surface); border-bottom: 1px solid var(--border); padding: 8px 16px 16px; gap: 0;
    max-height: calc(100vh - 64px); overflow-y: auto;
  }
  .nav-links.open { display: flex; }
  .menu { position: static; display: block; box-shadow: none; border: 0; padding: 0 0 8px; min-width: 0; }
  .nav-btn { width: 100%; justify-content: flex-start; color: var(--text-3); font-size: .8rem; text-transform: uppercase; letter-spacing: .06em; pointer-events: none; }
  .nav-btn svg { display: none; }
  .nav-links .theme-toggle { margin: 8px 0 0; }
}

/* Hero */
.hero { padding: 56px 0 28px; }
.hero h1 { font-size: clamp(2rem, 4.5vw, 3.1rem); max-width: 24ch; }
.hero p.lead { font-size: 1.15rem; color: var(--text-2); max-width: 62ch; }
.eyebrow { display: inline-block; font-size: .8rem; font-weight: 650; letter-spacing: .08em; text-transform: uppercase; color: var(--accent); margin-bottom: 10px; }
.myip-strip {
  display: flex; flex-wrap: wrap; align-items: center; gap: 10px 18px; margin-top: 18px; padding: 14px 18px;
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); box-shadow: var(--shadow); width: fit-content; max-width: 100%;
}
.myip-strip .ip { font-family: var(--mono); font-weight: 700; font-size: 1.15rem; word-break: break-all; }

/* Cards / grid */
.section { padding: 20px 0 36px; }
.section-head { display: flex; align-items: baseline; justify-content: space-between; gap: 12px; margin-bottom: 14px; }
.section-head h2 { margin: 0; }
.grid { display: grid; gap: 16px; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); }
.card {
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); box-shadow: var(--shadow);
  padding: 22px;
}
a.tool-card { display: flex; gap: 14px; color: var(--text); transition: border-color .15s, transform .15s; }
a.tool-card:hover { border-color: var(--accent); text-decoration: none; transform: translateY(-1px); }
a.tool-card h3 { margin: 0 0 4px; }
a.tool-card p { margin: 0; color: var(--text-2); font-size: .93rem; line-height: 1.45; }
.ico {
  width: 42px; height: 42px; border-radius: 10px; display: grid; place-items: center; flex: none;
  background: var(--accent-soft); color: var(--accent);
}
.ico svg { width: 22px; height: 22px; }

/* Tool page layout */
.breadcrumbs { font-size: .88rem; color: var(--text-3); padding-top: 22px; }
.breadcrumbs a { color: var(--text-3); }
.breadcrumbs span { margin: 0 6px; }
.tool-head { padding: 10px 0 18px; }
.tool-head p { color: var(--text-2); font-size: 1.08rem; margin: 0; max-width: 70ch; }
.layout { display: grid; gap: 24px; grid-template-columns: minmax(0, 1fr) 300px; align-items: start; padding-bottom: 40px; }
@media (max-width: 960px) { .layout { grid-template-columns: minmax(0, 1fr); } }
.aside { display: flex; flex-direction: column; gap: 16px; position: sticky; top: 84px; }
@media (max-width: 960px) { .aside { position: static; } }
.related a { display: flex; align-items: center; gap: 10px; padding: 8px 0; color: var(--text); font-weight: 550; }
.related a + a { border-top: 1px solid var(--border); }
.related .ico { width: 32px; height: 32px; border-radius: 8px; }
.related .ico svg { width: 17px; height: 17px; }

/* Forms */
.tool-form { display: grid; gap: 14px; }
.row { display: grid; gap: 12px; grid-template-columns: 1fr auto; align-items: end; }
.row.three { grid-template-columns: 1fr 180px auto; }
.row.split { grid-template-columns: 1fr 1fr auto; }
@media (max-width: 640px) { .row, .row.three, .row.split { grid-template-columns: 1fr; } }
label { display: block; font-weight: 600; font-size: .92rem; margin-bottom: 6px; }
.hint { font-weight: 400; color: var(--text-3); font-size: .84rem; }
.input-wrap { position: relative; }
input[type="text"], select {
  width: 100%; height: 48px; padding: 0 14px; font: 1rem var(--mono); color: var(--text); background: var(--surface);
  border: 1px solid var(--border); border-radius: var(--radius-sm); transition: border-color .15s, box-shadow .15s;
}
select { font-family: var(--font); appearance: none; background-image: linear-gradient(45deg, transparent 50%, var(--text-3) 50%), linear-gradient(135deg, var(--text-3) 50%, transparent 50%); background-position: calc(100% - 18px) 21px, calc(100% - 13px) 21px; background-size: 5px 5px; background-repeat: no-repeat; padding-right: 34px; }
input[type="text"]:focus, select:focus { outline: none; border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-soft); }
input[aria-invalid="true"] { border-color: var(--bad); }
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px; height: 48px; padding: 0 22px;
  border-radius: var(--radius-sm); border: 1px solid transparent; font: 600 1rem var(--font); cursor: pointer;
  background: var(--accent); color: var(--accent-text); white-space: nowrap; transition: background .15s;
}
.btn:hover { background: var(--accent-hover); text-decoration: none; }
.btn:disabled { opacity: .6; cursor: progress; }
.btn-ghost { background: var(--surface); color: var(--text); border-color: var(--border); height: 36px; padding: 0 12px; font-size: .88rem; }
.btn-ghost:hover { background: var(--surface-2); }
.form-actions { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; }
.spinner { width: 18px; height: 18px; border: 2px solid currentColor; border-right-color: transparent; border-radius: 50%; animation: spin .7s linear infinite; display: none; }
.loading .spinner { display: inline-block; }
@keyframes spin { to { transform: rotate(360deg); } }
.turnstile { min-height: 0; }

/* Results */
.results:empty { display: none; }
.results { margin-top: 20px; display: grid; gap: 16px; grid-template-columns: minmax(0, 1fr); }
.results > *, .card { min-width: 0; }
.result-head { display: flex; flex-wrap: wrap; align-items: center; gap: 10px; justify-content: space-between; margin-bottom: 10px; }
.result-head h2, .result-head h3 { margin: 0; }
.kv { display: grid; grid-template-columns: minmax(130px, 220px) minmax(0, 1fr); gap: 0; margin: 0; }
.kv dt, .kv dd { padding: 9px 0; border-bottom: 1px solid var(--border); margin: 0; }
.kv dt { color: var(--text-3); font-size: .9rem; padding-right: 12px; }
.kv dd { word-break: break-word; }
.kv > :nth-last-child(-n+2) { border-bottom: 0; }
@media (max-width: 520px) { .kv { grid-template-columns: 1fr; } .kv dt { border-bottom: 0; padding-bottom: 0; } }
.table-wrap { overflow-x: auto; border: 1px solid var(--border); border-radius: var(--radius-sm); }
table { width: 100%; border-collapse: collapse; font-size: .94rem; }
th, td { text-align: left; padding: 10px 12px; border-bottom: 1px solid var(--border); vertical-align: top; }
th { background: var(--surface-2); font-size: .8rem; text-transform: uppercase; letter-spacing: .05em; color: var(--text-3); font-weight: 650; white-space: nowrap; }
tr:last-child td { border-bottom: 0; }
td.num, th.num { text-align: right; font-variant-numeric: tabular-nums; }
.badge { display: inline-flex; align-items: center; gap: 6px; padding: 2px 10px; border-radius: 999px; font-size: .8rem; font-weight: 650; white-space: nowrap; background: var(--muted-soft); color: var(--text-2); }
.badge::before { content: ""; width: 7px; height: 7px; border-radius: 50%; background: currentColor; }
.badge.ok { background: var(--ok-soft); color: var(--ok); }
.badge.warn { background: var(--warn-soft); color: var(--warn); }
.badge.bad { background: var(--bad-soft); color: var(--bad); }
.badge.plain::before { display: none; }
.alert { padding: 14px 16px; border-radius: var(--radius-sm); border: 1px solid; font-size: .95rem; }
.alert-error { background: var(--bad-soft); color: var(--bad); border-color: color-mix(in srgb, var(--bad) 35%, transparent); }
.alert-warn { background: var(--warn-soft); color: var(--warn); border-color: color-mix(in srgb, var(--warn) 35%, transparent); }
.alert-info { background: var(--accent-soft); color: var(--text); border-color: color-mix(in srgb, var(--accent) 30%, transparent); }
.alert-ok { background: var(--ok-soft); color: var(--ok); border-color: color-mix(in srgb, var(--ok) 35%, transparent); }
.alert ul { margin: 6px 0 0; padding-left: 20px; }
.record { font-family: var(--mono); font-size: .88rem; background: var(--surface-2); border: 1px solid var(--border); border-radius: var(--radius-sm); padding: 10px 12px; word-break: break-all; white-space: pre-wrap; }
.stats { display: grid; grid-template-columns: repeat(auto-fit, minmax(120px, 1fr)); gap: 10px; }
.stat { background: var(--surface-2); border-radius: var(--radius-sm); padding: 12px 14px; }
.stat b { display: block; font-size: 1.4rem; font-variant-numeric: tabular-nums; }
.stat span { font-size: .82rem; color: var(--text-3); }
.stat.bad b { color: var(--bad); } .stat.ok b { color: var(--ok); }
.big-ip { font: 700 clamp(1.6rem, 5vw, 2.6rem)/1.15 var(--mono); word-break: break-all; margin: 4px 0 8px; }
.copy { cursor: pointer; }
details.raw summary { cursor: pointer; color: var(--text-2); font-weight: 600; font-size: .92rem; }
details.raw pre { max-height: 420px; overflow: auto; }
.step { font-size: .8rem; color: var(--text-3); font-weight: 650; text-transform: uppercase; letter-spacing: .06em; }
.trail { font-family: var(--mono); font-size: .82rem; color: var(--text-2); }
.trail span + span::before { content: " › "; color: var(--text-3); }
.tree { list-style: none; margin: 0; padding: 0; font-family: var(--mono); font-size: .85rem; }
.tree li { padding: 6px 0; border-bottom: 1px dashed var(--border); word-break: break-all; }
.tree li:last-child { border-bottom: 0; }
.muted { color: var(--text-3); }
.small { font-size: .88rem; }

/* Prose / FAQ */
.prose { color: var(--text-2); }
.prose h2 { color: var(--text); margin-top: 8px; }
.faq details { border-top: 1px solid var(--border); padding: 14px 0; }
.faq details:last-child { border-bottom: 1px solid var(--border); }
.faq summary { cursor: pointer; font-weight: 650; color: var(--text); list-style: none; display: flex; justify-content: space-between; gap: 12px; }
.faq summary::after { content: "+"; color: var(--accent); font-weight: 700; }
.faq details[open] summary::after { content: "–"; }
.faq summary::-webkit-details-marker { display: none; }
.faq p { margin: 10px 0 0; color: var(--text-2); }

/* Ads — reserve space to avoid layout shift */
.ad { display: block; min-height: 100px; text-align: center; }
.ad-side { min-height: 250px; }
.ad-label { font-size: .7rem; color: var(--text-3); text-transform: uppercase; letter-spacing: .08em; text-align: center; margin-bottom: 4px; }
.ad-placeholder { display: grid; place-items: center; border: 1px dashed var(--border); border-radius: var(--radius-sm); color: var(--text-3); font-size: .85rem; }

/* Footer */
.site-footer { margin-top: auto; border-top: 1px solid var(--border); background: var(--surface); padding: 36px 0 28px; font-size: .92rem; color: var(--text-2); }
.footer-grid { display: grid; gap: 24px; grid-template-columns: 1.4fr 1fr 1fr 1fr; }
@media (max-width: 760px) { .footer-grid { grid-template-columns: 1fr 1fr; } }
.site-footer h3 { font-size: .8rem; text-transform: uppercase; letter-spacing: .08em; color: var(--text-3); }
.site-footer ul { list-style: none; padding: 0; margin: 0; }
.site-footer li { margin: 6px 0; }
.site-footer a { color: var(--text-2); }
.footer-bottom { margin-top: 26px; padding-top: 18px; border-top: 1px solid var(--border); display: flex; flex-wrap: wrap; justify-content: space-between; gap: 10px; color: var(--text-3); font-size: .85rem; }
.consent-link { background: none; border: 0; color: var(--text-3); font: inherit; cursor: pointer; padding: 0; text-decoration: underline; }
.legal h2 { margin-top: 1.6em; }
.legal { max-width: 78ch; }
@media (prefers-reduced-motion: reduce) { * { transition: none !important; animation: none !important; } }
.btn svg { width: 16px; height: 16px; flex: none; }