:root {
    color-scheme: light;
    --page-bg: #fcfcfd;
    --control-bg: #fff;
    --button-text: #fff;
    --button-bg: #1459f5;
    --button-hover: #1048cc;
    --button-active: #103aa5;
    --accent-ink: #1744a2;
    --focus-ring: #1459f5;
    --focus-halo: rgb(20 89 245 / 10%);
    --text: #101828;
    --muted: #475569;
    --input-border: #c4cfde;
    --blue: #1459f5;
    --blue-light: #edf3ff;
    --error: #a32b35;
    --sans: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
    --mono: "IBM Plex Mono", ui-monospace, SFMono-Regular, Consolas, monospace;
    --width: 75rem;
    --form-width: 850px;
    --gutter: 2rem;
}
@media (prefers-color-scheme: dark) {
    :root {
        color-scheme: dark;
        --page-bg: #111318;
        --control-bg: #171a21;
        --text: #e7edf7;
        --muted: #aebbd0;
        --input-border: #535c6b;
        --blue: #8eb8ff;
        --blue-light: #203451;
        --accent-ink: #a6c8ff;
        --button-bg: #2761d2;
        --button-hover: #2358c4;
        --button-active: #1d49a8;
        --focus-ring: #92bbff;
        --focus-halo: rgb(146 187 255 / 12%);
        --error: #ff9ca6;
    }
}
* { box-sizing: border-box; }
body {
    margin: 0;
    min-height: 100vh;
    min-height: 100dvh;
    display: flex;
    flex-direction: column;
    color: var(--text);
    background: var(--page-bg);
    font: .9375rem/1.6 var(--sans);
}
.shell { width: min(calc(100% - 2 * var(--gutter)), var(--width)); margin-inline: auto; }
a { color: var(--blue); text-underline-offset: .24em; }
.header-inner {
    display: grid;
    grid-template-columns: 1fr auto;
    align-items: center;
    min-height: 4rem;
}
.brand { color: var(--text); font-weight: 800; letter-spacing: -.06em; text-decoration: none; }
.brand { font-size: 1.65rem; justify-self: start; }
nav { display: flex; align-items: center; flex-wrap: wrap; gap: clamp(.55rem, 2.5vw, 1.8rem); }
nav a { color: var(--muted); text-decoration: none; font-size: .9rem; }
nav a:hover, nav a[aria-current] { color: var(--blue); }
.site-header nav a { position: relative; display: flex; align-items: center; min-height: 4rem; white-space: nowrap; }
.site-header nav a[aria-current] { font-weight: 700; }
.site-header nav a[aria-current]::after {
    content: "";
    position: absolute;
    inset: auto 0 .35rem;
    height: 2px;
    background: var(--blue);
}
main { flex: 1 0 auto; padding-block: clamp(1.75rem, 3vw, 2.75rem) 3rem; overflow-wrap: anywhere; }
h1 { margin: 0; font-size: clamp(2.5rem, 3vw, 2.75rem); line-height: 1.13; letter-spacing: -.055em; font-weight: 700; }
h2 { margin: 0 0 .8rem; font-size: 1.35rem; line-height: 1.25; letter-spacing: -.025em; }
h3 { margin: 0 0 .55rem; font-size: .875rem; font-weight: 700; }
.intro { margin: .65rem 0 1.55rem; color: var(--muted); font-size: .9375rem; }
.tool-page > h1, .tool-page > .intro { text-align: center; }

.lookup-form { max-width: var(--form-width); margin-inline: auto; }
label { display: block; margin-bottom: .32rem; font-size: .83rem; font-weight: 550; color: var(--muted); }
.controls { display: flex; align-items: stretch; gap: .55rem; }
input, select, button {
    min-height: 3rem;
    padding: .55rem .85rem;
    border: 1px solid var(--input-border);
    border-radius: .55rem;
    color: inherit;
    background: var(--control-bg);
    font: inherit;
}
input { flex: 1 1 0; min-width: 0; }
input::placeholder { color: var(--muted); opacity: 1; }

input[aria-invalid="true"] { border-color: var(--error); }
select { padding-inline: .55rem; font: inherit; }
button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding-inline: clamp(.8rem, 3vw, 1.45rem);
    background: var(--button-bg);
    border-color: var(--button-bg);
    color: var(--button-text);
    font-weight: 700;
    cursor: pointer;
    white-space: nowrap;
}
button:hover:not(:disabled) { background: var(--button-hover); }
button:active:not(:disabled) { background: var(--button-active); }
button:disabled { opacity: .65; cursor: wait; }
:focus-visible { outline: 2px solid var(--focus-ring); outline-offset: 2px; }
:is(input, select):focus {
    outline: none;
    border-color: var(--focus-ring);
    box-shadow: 0 0 0 2px var(--focus-halo);
}
@media (forced-colors: active) {
    :is(input, select):focus-visible { outline: 2px solid Highlight; outline-offset: 1px; }
}
.notice { margin: .5rem 0 0; color: var(--muted); font-size: .9rem; }
.notice:empty { margin: 0; }
.notice.is-error { color: var(--error); }

.results { max-width: 64rem; margin-top: clamp(4rem, 5vw, 5rem); overflow-wrap: anywhere; }
.result-header {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: .35rem .8rem;
    margin-bottom: 1.15rem;
}
.result-title {
    border-inline-start: 3px solid var(--blue);
    padding-inline-start: .65rem;
    min-width: 0;
    margin: 0;
    font-size: clamp(2rem, 2.65vw, 2.375rem);
    font-weight: 700;
    line-height: 1.2;
    letter-spacing: -.04em;
}
.result-meta { color: var(--muted); font-size: .85rem; }
.ip-address { font-variant-numeric: tabular-nums; }
.ip-copy {
    flex: 0 0 44px;
    min-width: 44px;
    min-height: 44px;
    padding: 0;
    background: transparent;
    border-color: transparent;
    color: var(--muted);
}
.ip-copy:hover:not(:disabled), .ip-copy:active:not(:disabled) {
    background: var(--blue-light);
    color: var(--accent-ink);
}
.ip-results .result-header { flex-wrap: nowrap; align-items: center; gap: .25rem; }
.result-groups { display: grid; grid-template-columns: 1fr 1fr; gap: 1.3rem 2rem; }
.result-group { min-width: 0; }
.result { display: grid; grid-template-columns: minmax(6.35rem, 29%) minmax(0, 1fr); gap: .55rem .8rem; margin: 0; }
dt { color: var(--muted); font-size: .875rem; }
dd { margin: 0; font-weight: 500; }
.asn-value { font-family: var(--mono); }
dd ul, .record-list { margin: 0; padding: 0; list-style: none; }
.record-list { display: grid; gap: .65rem; max-width: 34rem; }
.record-row {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: baseline;
    gap: .75rem;
}
.record-value { min-width: 0; }
.record-ttl { grid-column: 2; white-space: nowrap; font-variant-numeric: tabular-nums; }
.record-meta { display: block; margin-top: .2rem; }
.rdap-fields { grid-template-columns: minmax(0, 1fr); gap: .55rem; max-width: 52rem; }
.result-row {
    display: grid;
    grid-template-columns: 10rem minmax(0, 1fr);
    gap: 1.25rem;
}
.rdap-fields dd li + li { margin-top: .15rem; }
.soa-fields { grid-template-columns: 8.5rem minmax(0, 1fr); }
code { font-family: var(--mono); }
pre { white-space: pre-wrap; }
[hidden] { display: none !important; }
.site-footer { color: var(--muted); font-size: .85rem; }
.footer-inner { display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: .6rem 1.2rem; min-height: 3.8rem; padding-block: .75rem; }
.footer-inner a { color: inherit; text-decoration: none; }

.dns-controls {
    display: grid;
    grid-template-columns: 5.25rem minmax(0, 1fr) auto;
    gap: .32rem .55rem;
}
.dns-controls label { margin: 0; }
.dns-controls select { grid-column: 1; }
.dns-controls input { width: 100%; }
.dns-controls select,
.dns-controls input,
.dns-controls button { grid-row: 2; }
.dns-controls select { padding-inline: .65rem; }

@media (max-width: 38rem) {
    .header-inner { display: flex; justify-content: space-between; gap: .4rem 1rem; min-height: 3.5rem; }
    .brand { font-size: 1.4rem; }
    .site-header nav { gap: 0 clamp(.3rem, 2vw, .8rem); }
    .site-header nav a { min-height: 3.5rem; min-width: 2.75rem; justify-content: center; padding-inline: .25rem; }
    .shell { --gutter: clamp(1rem, 4.6vw, 1.25rem); }
    main { padding-block: 1.15rem 1.75rem; }
    h1 { font-size: 1.75rem; }
    .intro { margin-bottom: 1.15rem; }
    input, select, button { min-height: 3rem; }
    input, select { font-size: 1rem; }
    .lookup-form .controls {
        display: grid;
        grid-template-columns: minmax(0, 1fr);
        gap: .5rem;
    }
    .lookup-form .controls > button {
        grid-column: 1 / -1;
        width: 100%;
    }
    .lookup-form .dns-controls { grid-template-columns: 4.65rem minmax(0, 1fr); }
    .dns-controls label { margin-bottom: -.18rem; }
    .dns-controls button { grid-row: 3; }
    .dns-controls select { padding-inline-start: .5rem; }
    .ip-copy svg { width: 16px; height: 16px; }
    .result-title { font-size: clamp(1.625rem, 7vw, 1.875rem); }
    .result-groups { grid-template-columns: minmax(0, 1fr); gap: .95rem; }
    .result-group .result { grid-template-columns: 5.5rem minmax(0, 1fr); gap: .45rem .7rem; }
    .rdap-fields .result-row, .soa-fields { grid-template-columns: minmax(0, 1fr); row-gap: .12rem; }
    .soa-fields dd:not(:last-child) { margin-bottom: .4rem; }
    .footer-inner { justify-content: flex-start; gap: .25rem .8rem; min-height: 0; }
}

.brand-ai {
    margin-inline-start: .2em;
    color: var(--blue);
    font-size: .38em;
    font-weight: 650;
    letter-spacing: .03em;
    line-height: 0;
    vertical-align: super;
}

.record-row:has(.soa-fields) { grid-template-columns: minmax(0, 1fr); gap: .45rem; }
.record-row:has(.soa-fields) .record-ttl { grid-column: 1; }