/* Password and DNS Toolbox — single stylesheet, no web fonts, no framework. */
:root {
  --bg: #f7f8f9;
  --surface: #ffffff;
  --surface-2: #f0f3f5;
  --text: #16202a;
  --muted: #56636f;
  --border: #d9dfe4;
  --accent: #0f5c6e;
  --accent-strong: #0a4452;
  --accent-soft: #e3f1f4;
  --focus: #e8a33d;
  --pass: #17663a; --pass-bg: #e6f4ea;
  --warn: #8a5100; --warn-bg: #fdf1dc;
  --fail: #a4262c; --fail-bg: #fbe8e9;
  --info: #2d5aa0; --info-bg: #e8effa;
  --radius: 10px;
  --shadow: 0 1px 2px rgba(16, 32, 48, .06), 0 2px 8px rgba(16, 32, 48, .04);
  --mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, "Liberation Mono", monospace;
  --sans: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  color-scheme: light dark;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0f1418; --surface: #161d22; --surface-2: #1d262d; --text: #e6ebef; --muted: #9aa8b3;
    --border: #2c3840; --accent: #5ec2d6; --accent-strong: #8ad7e6; --accent-soft: #15343c;
    --pass: #6fd08f; --pass-bg: #14301f; --warn: #f2b85c; --warn-bg: #352812;
    --fail: #ff8a8f; --fail-bg: #3a1a1c; --info: #8fb5f2; --info-bg: #182640;
    --shadow: none;
  }
}

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-padding-top: 1rem; }
body { margin: 0; background: var(--bg); color: var(--text); font: 16px/1.6 var(--sans); }
img, svg { max-width: 100%; }
a { color: var(--accent); text-underline-offset: 2px; }
a:hover { color: var(--accent-strong); }
:focus-visible { outline: 3px solid var(--focus); outline-offset: 2px; border-radius: 3px; }
h1, h2, h3, h4 { line-height: 1.25; margin: 1.6em 0 .5em; }
h1 { font-size: clamp(1.7rem, 3.2vw, 2.4rem); margin-top: .4em; letter-spacing: -.01em; }
h2 { font-size: 1.4rem; }
h3, .h3 { font-size: 1.15rem; }
.h4 { font-size: 1rem; margin: 0 0 .4em; }
p { margin: 0 0 1em; }
code, .mono { font-family: var(--mono); font-size: .92em; }
.small { font-size: .875rem; }
.muted { color: var(--muted); }
.nowrap { white-space: nowrap; }
.break { overflow-wrap: anywhere; word-break: break-word; }
.visually-hidden { position: absolute !important; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); clip-path: inset(50%); white-space: nowrap; }
.skip-link { position: absolute; left: .5rem; top: -3rem; background: var(--accent); color: #fff; padding: .5rem 1rem; border-radius: 6px; z-index: 10; }
.skip-link:focus { top: .5rem; color: #fff; }
.wrap { max-width: 72rem; margin: 0 auto; padding: 0 1rem; }
[hidden] { display: none !important; }
main:focus { outline: none; }

/* Header */
.site-header { background: var(--surface); border-bottom: 1px solid var(--border); }
.header-inner { display: flex; align-items: center; justify-content: space-between; gap: 1rem; min-height: 3.75rem; flex-wrap: wrap; }
.brand { display: inline-flex; align-items: center; gap: .5rem; text-decoration: none; color: var(--text); font-weight: 700; font-size: 1.05rem; }
.brand-mark { width: 26px; height: 26px; fill: var(--accent); stroke: var(--accent); }
.brand-mark circle { fill: var(--surface); }
.brand-tld { color: var(--accent); }
.main-nav ul { list-style: none; margin: 0; padding: 0; display: flex; gap: .25rem; flex-wrap: wrap; }
.main-nav a { display: block; padding: .45rem .7rem; border-radius: 6px; text-decoration: none; color: var(--text); font-size: .95rem; }
.main-nav a:hover { background: var(--surface-2); }
.main-nav .nav-all { color: var(--accent); font-weight: 600; }

/* Buttons & forms */
.btn { display: inline-flex; align-items: center; gap: .4rem; font: inherit; font-weight: 600; font-size: .95rem; padding: .6rem 1rem; border-radius: 8px; border: 1px solid var(--border); background: var(--surface); color: var(--text); cursor: pointer; text-decoration: none; min-height: 44px; }
.btn:hover { background: var(--surface-2); color: var(--text); }
.btn-primary { background: var(--accent); border-color: var(--accent); color: #fff; }
.btn-primary:hover { background: var(--accent-strong); border-color: var(--accent-strong); color: #fff; }
@media (prefers-color-scheme: dark) { .btn-primary, .btn-primary:hover { color: #0b1216; } }
.btn-small { padding: .35rem .7rem; min-height: 36px; font-size: .875rem; }
.btn[aria-busy="true"] { opacity: .75; cursor: progress; }
.btn[aria-busy="true"]::after { content: ""; width: 1em; height: 1em; border: 2px solid currentColor; border-right-color: transparent; border-radius: 50%; animation: spin .8s linear infinite; }
@keyframes spin { to { transform: rotate(360deg); } }
@media (prefers-reduced-motion: reduce) { .btn[aria-busy="true"]::after { animation: none; } }
input[type=text], input[type=search], input[type=number], select, textarea {
  font: inherit; color: var(--text); background: var(--surface); border: 1px solid #aab4bd; border-radius: 8px; padding: .55rem .7rem; width: 100%; min-height: 44px;
}
@media (prefers-color-scheme: dark) { input[type=text], input[type=search], input[type=number], select, textarea { border-color: #4a5862; } }
textarea { resize: vertical; font-family: var(--mono); font-size: .85rem; line-height: 1.45; }
label { font-weight: 600; display: block; margin-bottom: .3rem; }
label.check, .pw-sets label { font-weight: 400; display: flex; align-items: center; gap: .5rem; margin: 0; }
input[type=checkbox] { width: 1.15rem; height: 1.15rem; accent-color: var(--accent); }
.help { margin: .3rem 0 0; color: var(--muted); font-size: .85rem; }
.card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); box-shadow: var(--shadow); padding: 1.25rem; }
.tool-form .fields { display: grid; grid-template-columns: repeat(auto-fit, minmax(14rem, 1fr)); gap: 1rem; }
.tool-form .field-textarea { grid-column: 1 / -1; }
.tool-form .field-checkbox { align-self: end; padding-bottom: .6rem; }
.form-actions { display: flex; align-items: center; gap: 1rem; margin-top: 1rem; flex-wrap: wrap; }
.search-form { display: flex; gap: .5rem; max-width: 36rem; }
.search-form input { flex: 1; }
.inline-form { display: flex; gap: .5rem; flex-wrap: wrap; }
.inline-form input { flex: 1 1 10rem; width: auto; }

/* Page structure */
.page-head { padding-top: 1.25rem; }
.lead { font-size: 1.1rem; color: var(--muted); max-width: 48rem; }
.breadcrumbs ol { list-style: none; padding: 0; margin: 0; display: flex; flex-wrap: wrap; gap: .25rem; font-size: .875rem; color: var(--muted); }
.breadcrumbs li + li::before { content: "/"; margin-right: .25rem; color: var(--border); }
.hero { background: linear-gradient(180deg, var(--surface) 0%, var(--bg) 100%); border-bottom: 1px solid var(--border); padding: 1.5rem 0 2rem; }
.hero-grid { display: grid; grid-template-columns: 1fr; gap: 2rem; align-items: start; }
@media (min-width: 60rem) { .hero-grid { grid-template-columns: 1fr 1.1fr; } .hero-copy { padding-top: 1.5rem; } }
.hero-tool h2 { margin-top: 0; }
.tool-section { padding-top: .5rem; }
.card-grid { list-style: none; padding: 0; margin: 1rem 0 0; display: grid; grid-template-columns: repeat(auto-fill, minmax(16rem, 1fr)); gap: .9rem; }
.tool-card a { display: flex; flex-direction: column; gap: .35rem; height: 100%; padding: 1rem 1.1rem; border: 1px solid var(--border); border-radius: var(--radius); background: var(--surface); text-decoration: none; color: var(--text); box-shadow: var(--shadow); transition: border-color .15s; }
.tool-card a:hover { border-color: var(--accent); }
.tool-card-name { font-weight: 700; color: var(--accent); }
.tool-card-desc { font-size: .9rem; color: var(--muted); }
.principles { padding: 1rem 1rem 2rem; }
.principles-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(16rem, 1fr)); gap: 1.5rem; }
.principles h3 { margin-top: .5rem; }

.tool-layout { display: grid; grid-template-columns: minmax(0, 1fr); gap: 2rem; padding-bottom: 3rem; }
@media (min-width: 64rem) { .tool-layout { grid-template-columns: minmax(0, 1fr) 18rem; } }
.tool-aside { font-size: .95rem; }
@media (min-width: 64rem) { .tool-aside { position: sticky; top: 1rem; align-self: start; } }
.tool-aside h2 { margin-top: 0; }
.related { list-style: none; padding: 0; margin: 0; display: grid; gap: .5rem; }
.related a { display: block; padding: .7rem .85rem; border: 1px solid var(--border); border-radius: 8px; background: var(--surface); text-decoration: none; }
.related a:hover { border-color: var(--accent); }
.related strong { display: block; }
.related span { display: block; color: var(--muted); font-size: .85rem; }
.api-note { margin-top: 1.5rem; padding: 1rem; background: var(--surface-2); border-radius: 8px; }
.api-note code { display: block; padding: .3rem 0; }

.prose { max-width: 48rem; }
.prose ul { padding-left: 1.25rem; }
.prose li { margin-bottom: .35rem; }
.deflist dt { font-weight: 700; margin-top: .75rem; }
.deflist dd { margin: .15rem 0 0; }
.tool-content { margin-top: 2.5rem; }
.faq details { border-bottom: 1px solid var(--border); padding: .75rem 0; }
.faq summary { cursor: pointer; font-weight: 600; }
.faq details p { margin: .6rem 0 0; }
.legal h2 { font-size: 1.2rem; }

/* Notices & statuses */
.notice { padding: .8rem 1rem; border-radius: 8px; background: var(--info-bg); border-left: 4px solid var(--info); }
.notice-warn { background: var(--warn-bg); border-left-color: var(--warn); }
.status { padding: 1rem 1.1rem; border-radius: var(--radius); border-left: 5px solid; margin: 1.25rem 0; }
.status p { margin: 0; }
.status-title { font-weight: 700; margin-bottom: .25rem !important; }
.status-fail { background: var(--fail-bg); border-color: var(--fail); }
.status-warn { background: var(--warn-bg); border-color: var(--warn); }
.result { margin-top: 1.5rem; }
.result:focus { outline: none; }
.result-head { display: flex; align-items: center; gap: .75rem 1rem; flex-wrap: wrap; margin-bottom: .75rem; }
.result-head p { margin: 0; }
.badge { display: inline-block; padding: .3rem .8rem; border-radius: 999px; font-weight: 700; font-size: .9rem; }
.badge-pass { background: var(--pass-bg); color: var(--pass); }
.badge-warn { background: var(--warn-bg); color: var(--warn); }
.badge-fail, .badge-error { background: var(--fail-bg); color: var(--fail); }
.badge-info { background: var(--info-bg); color: var(--info); }
.findings { list-style: none; padding: 0; margin: 0 0 1.5rem; display: grid; gap: .5rem; }
.finding { display: grid; grid-template-columns: 5.5rem 1fr; gap: .75rem; padding: .7rem .9rem; border-radius: 8px; background: var(--surface); border: 1px solid var(--border); border-left-width: 4px; }
.finding p { margin: 0; }
.finding-title { font-weight: 600; }
.finding-detail { color: var(--muted); font-size: .92rem; margin-top: .2rem !important; }
.finding-level { font-size: .75rem; font-weight: 700; text-transform: uppercase; letter-spacing: .04em; padding-top: .15rem; }
.finding-pass { border-left-color: var(--pass); } .finding-pass .finding-level { color: var(--pass); }
.finding-warn { border-left-color: var(--warn); } .finding-warn .finding-level { color: var(--warn); }
.finding-fail { border-left-color: var(--fail); } .finding-fail .finding-level { color: var(--fail); }
.finding-info { border-left-color: var(--info); } .finding-info .finding-level { color: var(--info); }
@media (max-width: 30rem) { .finding { grid-template-columns: 1fr; gap: .2rem; } }
.pill { display: inline-block; padding: .1rem .55rem; border-radius: 999px; font-size: .8rem; font-weight: 700; white-space: nowrap; }
.pill-pass { background: var(--pass-bg); color: var(--pass); }
.pill-warn { background: var(--warn-bg); color: var(--warn); }
.pill-fail { background: var(--fail-bg); color: var(--fail); }
.pill-info { background: var(--info-bg); color: var(--info); }
.pill-muted { background: var(--surface-2); color: var(--muted); }
.tag { display: inline-block; font-size: .72rem; font-weight: 700; text-transform: uppercase; letter-spacing: .03em; padding: .05rem .4rem; border-radius: 4px; background: var(--surface-2); color: var(--muted); margin-left: .35rem; vertical-align: middle; }
.note { display: block; font-family: var(--sans); font-size: .8rem; color: var(--muted); margin-top: .15rem; }
.note-warn { color: var(--warn); }
.note-fail { color: var(--fail); display: inline; margin-left: .4rem; }
.error-text { color: var(--fail); }
.empty { color: var(--muted); font-style: italic; }

/* Tables */
.table-wrap { overflow-x: auto; margin: .5rem 0 1rem; border: 1px solid var(--border); border-radius: 8px; background: var(--surface); }
table { border-collapse: collapse; width: 100%; font-size: .92rem; }
th, td { text-align: left; vertical-align: top; padding: .55rem .75rem; border-bottom: 1px solid var(--border); }
thead th { background: var(--surface-2); font-size: .8rem; text-transform: uppercase; letter-spacing: .03em; color: var(--muted); }
tbody tr:last-child > * { border-bottom: 0; }
tbody th { font-weight: 600; }
tbody th .mono, tbody th .small { display: block; font-weight: 400; }
.kv { background: var(--surface); border: 1px solid var(--border); border-radius: 8px; margin-bottom: 1rem; }
.kv th { width: 34%; color: var(--muted); font-weight: 600; }
.row-fail { background: var(--fail-bg); }
.row-warn { background: var(--warn-bg); }
.record-block { margin: 1.25rem 0; }
.record-type { display: flex; align-items: baseline; gap: .6rem; margin: 0 0 .4rem; }
.rtype { font-family: var(--mono); background: var(--accent-soft); color: var(--accent-strong); padding: .1rem .5rem; border-radius: 5px; font-size: .95rem; }
.pref { display: inline-block; min-width: 2.2em; color: var(--muted); }
.soa { display: grid; grid-template-columns: auto 1fr; gap: .15rem .9rem; margin: 0; font-family: var(--sans); }
.soa dt { color: var(--muted); }
.soa dd { margin: 0; font-family: var(--mono); }
.copy-mini { font: inherit; font-family: var(--sans); font-size: .75rem; margin-left: .4rem; padding: .05rem .45rem; border: 1px solid var(--border); background: var(--surface); color: var(--muted); border-radius: 4px; cursor: pointer; vertical-align: middle; }
.copy-mini:hover { color: var(--accent); border-color: var(--accent); }
.record-box { display: block; padding: .75rem .9rem; background: var(--surface-2); border-radius: 8px; margin: .4rem 0 1rem; }
.stat-row { display: flex; gap: .75rem; flex-wrap: wrap; margin: .5rem 0 1rem; }
.stat { background: var(--surface); border: 1px solid var(--border); border-radius: 8px; padding: .6rem 1rem; min-width: 7rem; }
.stat-num { display: block; font-size: 1.5rem; font-weight: 700; font-family: var(--mono); }
.stat-num.small { font-size: 1rem; padding: .35rem 0; }
.stat-label { font-size: .8rem; color: var(--muted); }
.stat-warn { border-color: var(--warn); } .stat-fail { border-color: var(--fail); }
.related-checks { display: grid; grid-template-columns: repeat(auto-fit, minmax(15rem, 1fr)); gap: 1rem; }
.related-checks h4 { margin: 0 0 .5rem; }
.kind { display: inline-block; font-size: .7rem; font-weight: 700; text-transform: uppercase; letter-spacing: .03em; color: var(--muted); }
.kind-authoritative { color: var(--accent); }

/* SPF tree */
.spf-tree, .spf-children { list-style: none; padding: 0; margin: 0; }
.spf-children { margin-left: .5rem; padding-left: 1rem; border-left: 2px solid var(--border); }
.spf-node { margin: .75rem 0; }
.spf-domain { margin: 0 0 .25rem; font-weight: 600; }
.spf-record { display: block; padding: .5rem .75rem; background: var(--surface-2); border-radius: 6px; font-size: .85rem; }
.spf-terms { list-style: none; padding: 0; margin: .4rem 0 0; font-size: .9rem; }
.spf-terms li { padding: .15rem 0; }
.spf-terms code { color: var(--accent-strong); margin-right: .5rem; }

/* Header analyzer */
.auth-summary { display: grid; grid-template-columns: repeat(3, 1fr); gap: .6rem; margin-bottom: .5rem; }
.auth-box { border-radius: 8px; padding: .7rem; text-align: center; border: 1px solid var(--border); }
.auth-name { display: block; font-size: .8rem; font-weight: 700; letter-spacing: .05em; }
.auth-val { display: block; font-family: var(--mono); font-size: 1.1rem; font-weight: 700; }
.auth-pass { background: var(--pass-bg); color: var(--pass); }
.auth-fail { background: var(--fail-bg); color: var(--fail); }
.auth-warn { background: var(--warn-bg); color: var(--warn); }
.auth-info { background: var(--surface-2); color: var(--muted); }
.timeline { list-style: none; padding: 0; margin: 0; }
.hop { position: relative; padding: 0 0 1rem 2.6rem; }
.hop::before { content: ""; position: absolute; left: .95rem; top: 1.8rem; bottom: 0; width: 2px; background: var(--border); }
.hop:last-child::before { display: none; }
.hop-head { display: flex; gap: .6rem; align-items: center; margin-left: -2.6rem; }
.hop-num { width: 2rem; height: 2rem; border-radius: 50%; background: var(--accent); color: #fff; display: grid; place-items: center; font-weight: 700; font-size: .9rem; flex: none; }
@media (prefers-color-scheme: dark) { .hop-num { color: #0b1216; } }
.hop-delay { font-family: var(--mono); font-size: .85rem; color: var(--muted); }
.hop-delay.warn { color: var(--warn); font-weight: 700; }
.hop-body { display: grid; grid-template-columns: 3.5rem 1fr; gap: .1rem .6rem; margin: .3rem 0; font-size: .9rem; }
.hop-body dt { color: var(--muted); }
.hop-body dd { margin: 0; }
.chain { padding-left: 1.25rem; }
.chain li { margin-bottom: .4rem; }
.chain .small { display: block; }
.redirects { list-style: none; padding: 0; margin: 0 0 1rem; counter-reset: hop; }
.redirect-hop { display: grid; gap: .2rem; padding: .7rem .9rem; border: 1px solid var(--border); border-radius: 8px; background: var(--surface); margin-bottom: .5rem; position: relative; }
.redirect-hop + .redirect-hop::before { content: "↓"; position: absolute; top: -1.05rem; left: 1.3rem; color: var(--muted); }
.status-line { font-size: 1.05rem; }

/* Password widget */
.pw-widget { display: grid; gap: 1rem; }
.pw-output-row { display: flex; gap: .5rem; flex-wrap: wrap; }
.pw-output { flex: 1 1 14rem; font-size: 1.15rem !important; letter-spacing: .02em; padding: .7rem .8rem !important; min-height: 52px !important; }
.pw-actions { display: flex; gap: .5rem; }
.meter { height: 8px; background: var(--surface-2); border-radius: 999px; overflow: hidden; }
.meter span { display: block; height: 100%; width: 0; background: var(--fail); border-radius: inherit; transition: width .2s, background-color .2s; }
@media (prefers-reduced-motion: reduce) { .meter span { transition: none; } }
.pw-strength { margin: .35rem 0 0; font-size: .9rem; }
.pw-length { display: grid; grid-template-columns: auto 1fr 5.5rem; gap: .75rem; align-items: center; }
.pw-length label { margin: 0; }
.pw-length input[type=range] { width: 100%; accent-color: var(--accent); }
.pw-options { display: grid; gap: .9rem; }
.pw-sets { border: 0; padding: 0; margin: 0; display: grid; grid-template-columns: repeat(auto-fit, minmax(12rem, 1fr)); gap: .5rem 1rem; }
.pw-sets legend { font-weight: 600; padding: 0; margin-bottom: .4rem; }
.pw-qty select { width: auto; min-height: 36px; padding: .25rem .5rem; margin-left: .25rem; }
.pw-list { margin: 0; padding-left: 1.75rem; display: grid; gap: .35rem; }
.pw-list li { overflow-wrap: anywhere; }
.pw-privacy { margin: 0; }
.pw-privacy svg { vertical-align: -2px; margin-right: .2rem; }
.pw-sets .muted { white-space: nowrap; }
@media (max-width: 40rem) { .main-nav a { padding: .35rem .5rem; } .header-inner { padding-bottom: .4rem; } }

/* Footer */
.site-footer { background: var(--surface); border-top: 1px solid var(--border); margin-top: 2rem; padding: 2rem 0 1rem; font-size: .9rem; }
.footer-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(11rem, 1fr)); gap: 1.5rem; }
.footer-h { font-size: .85rem; text-transform: uppercase; letter-spacing: .05em; color: var(--muted); margin: 0 0 .5rem; }
.site-footer ul { list-style: none; padding: 0; margin: 0; }
.site-footer li { margin-bottom: .3rem; }
.site-footer a { color: var(--text); text-decoration: none; }
.site-footer a:hover { color: var(--accent); text-decoration: underline; }
.footer-note { margin-top: 1.5rem; padding-top: 1rem; border-top: 1px solid var(--border); color: var(--muted); font-size: .85rem; }

@media print { .site-header, .site-footer, .tool-aside, .tool-form { display: none; } }

/* What is my IP */
.myip { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 1.25rem; margin-bottom: 1rem; text-align: center; }
.myip-label { margin: 0; color: var(--muted); font-size: .9rem; }
.myip-value { font-size: clamp(1.4rem, 5vw, 2.2rem); font-weight: 700; margin: .25rem 0 .75rem; }
ul.columns { columns: 14rem auto; padding-left: 1.1rem; }

/* Guides */
.guide { padding-top: 1.25rem; padding-bottom: 3rem; }
.guide-head h1 { max-width: 48rem; }
.guide-layout { display: grid; grid-template-columns: minmax(0, 1fr); gap: 2rem; }
@media (min-width: 64rem) { .guide-layout { grid-template-columns: minmax(0, 1fr) 18rem; } }
.answer-box { background: var(--accent-soft); border-left: 4px solid var(--accent); border-radius: 8px; padding: 1rem 1.2rem; margin: 1rem 0; }
.answer-box h2 { margin: 0 0 .4rem; }
.answer-box p { margin: 0; }
.takeaways { border: 1px solid var(--border); border-radius: 8px; padding: .8rem 1.2rem; margin-bottom: 1.5rem; background: var(--surface); }
.takeaways h2 { margin: 0 0 .3rem; }
.takeaways ul { margin: 0; }
.prose pre.record-box { white-space: pre-wrap; overflow-wrap: anywhere; }
.prose table { margin: 1rem 0; border: 1px solid var(--border); background: var(--surface); }
.toc ol { padding-left: 1.2rem; font-size: .9rem; }
.toc { margin-bottom: 1.5rem; }
.plain-list { list-style: none; padding: 0; }
.plain-list li { margin-bottom: .4rem; }