:root {
    color-scheme: dark;
    --bg: #0a0b0d;
    --panel: #0d0f12;
    --line: #1e2126;
    --line-strong: #2c3138;
    --text: #e7e9ec;
    --muted: #8a9199;
    --dim: #6a727b;
    --accent: #c8ff5e;
    --err: #ff6b6b;
    --warn: #ffc857;
    --mono: ui-monospace, "SFMono-Regular", Menlo, Consolas, "Liberation Mono", monospace;
    --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", Roboto, Helvetica, Arial, sans-serif;
}
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
    margin: 0;
    min-height: 100vh;
    background: var(--bg);
    color: var(--text);
    font-family: var(--sans);
    font-size: 15px;
    line-height: 1.75;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}
::selection { background: var(--accent); color: var(--bg); }
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; text-underline-offset: 3px; }
.wrap { width: 100%; max-width: 1000px; margin: 0 auto; padding: 0 20px; }

.topbar { border-bottom: 1px solid var(--line); }
.topbar .inner {
    display: flex; align-items: center; justify-content: space-between; gap: 12px;
    height: 56px;
}
.brand {
    display: inline-flex; align-items: center; gap: 9px;
    font-family: var(--mono); font-size: 13px; letter-spacing: .01em;
    color: var(--text);
}
.brand:hover { color: var(--accent); text-decoration: none; }
.caret { color: var(--accent); animation: blink 1.2s steps(1) infinite; }
@keyframes blink { 50% { opacity: 0; } }
.topbar .meta {
    font-family: var(--mono); font-size: 11px; letter-spacing: .16em;
    text-transform: uppercase; color: var(--dim); white-space: nowrap;
}

.hero { padding: 40px 0 0; }
.eyebrow {
    margin: 0 0 12px;
    font-family: var(--mono); font-size: 11px; letter-spacing: .16em;
    text-transform: uppercase; color: var(--dim);
}
.eyebrow b { color: var(--accent); font-weight: 500; }
h1 { margin: 0; font-size: clamp(1.45rem, 4.4vw, 2rem); line-height: 1.3; font-weight: 650; letter-spacing: -.01em; }
h1 .sub {
    display: block; margin-top: 8px;
    font-family: var(--mono); font-size: clamp(.82rem, 2.6vw, .95rem);
    font-weight: 400; letter-spacing: .04em; color: var(--muted);
}
.lead { margin: 16px 0 0; color: var(--muted); font-size: 14.5px; max-width: 42em; }

.panel { margin-top: 26px; border: 1px solid var(--line); background: var(--panel); border-radius: 3px; }
.panel-head {
    display: flex; align-items: center; flex-wrap: wrap; gap: 10px 14px;
    padding: 9px 14px; border-bottom: 1px solid var(--line);
    font-family: var(--mono); font-size: 11px; letter-spacing: .12em;
    text-transform: uppercase; color: var(--dim);
}
.panel-title { display: inline-flex; align-items: center; gap: 8px; }
.panel-title::before { content: ""; width: 6px; height: 6px; background: var(--dim); }
.summary {
    display: inline-flex; align-items: center; gap: 7px;
    margin: 0 0 0 auto;
    font-family: var(--mono); font-size: 11px; letter-spacing: .04em;
    text-transform: none; color: var(--muted);
}
.summary::before { content: ""; width: 6px; height: 6px; border-radius: 50%; background: currentColor; flex: 0 0 auto; }
.summary[data-state="ok"] { color: var(--accent); }
.summary[data-state="loading"] { color: var(--warn); }
.summary[data-state="error"] { color: var(--err); }
.summary[data-state="loading"]::before { animation: blink 1s steps(1) infinite; }

.btn {
    display: inline-flex; align-items: center; justify-content: center; gap: 6px;
    height: 28px; padding: 0 11px;
    border: 1px solid var(--line-strong); border-radius: 2px;
    background: transparent; color: var(--muted);
    font-family: var(--mono); font-size: 10.5px; letter-spacing: .1em;
    text-transform: uppercase; cursor: pointer;
    transition: color .15s ease, border-color .15s ease;
}
.btn:hover { color: var(--accent); border-color: var(--accent); }
.btn:focus-visible { outline: 1px solid var(--accent); outline-offset: 2px; }
.btn:disabled { opacity: .35; cursor: not-allowed; }

.iptable { width: 100%; border-collapse: collapse; table-layout: fixed; }
.iptable th, .iptable td { text-align: left; vertical-align: top; }
.iptable .col-label { width: 96px; }
.iptable thead th {
    padding: 13px 14px; border-bottom: 1px solid var(--line);
    font-family: var(--mono); font-size: 11px; font-weight: 600;
    letter-spacing: .14em; text-transform: uppercase; color: var(--muted);
}
.iptable thead th.corner { padding: 13px 0; }
.iptable tbody th {
    padding: 13px 14px; font-size: 12px; font-weight: 500;
    color: var(--dim); white-space: nowrap;
}
.iptable tbody td {
    padding: 13px 14px; font-size: 13px; color: var(--text);
    border-top: 1px solid var(--line);
    word-break: break-word; overflow-wrap: anywhere;
}
.iptable tbody tr:first-child th, .iptable tbody tr:first-child td { border-top: 0; }

.st {
    display: inline-flex; align-items: center; gap: 6px;
    margin-left: 10px;
    font-family: var(--mono); font-size: 10.5px; letter-spacing: .06em;
    text-transform: none; color: var(--dim); white-space: nowrap;
}
.st::before { content: ""; width: 5px; height: 5px; border-radius: 50%; background: currentColor; flex: 0 0 auto; }
.st[data-state="ok"] { color: var(--accent); }
.st[data-state="loading"] { color: var(--warn); }
.st[data-state="error"] { color: var(--err); }

.cell-ip { display: flex; flex-direction: column; align-items: flex-start; gap: 8px; }
.ip {
    font-family: var(--mono); font-size: clamp(.9rem, 2.4vw, 1rem);
    line-height: 1.45; color: var(--text);
    word-break: break-all; overflow-wrap: anywhere;
    -webkit-user-select: all; user-select: all;
}
.ip[data-state="loading"] { color: var(--dim); font-size: 12px; }
.ip[data-state="error"] { color: var(--err); font-size: 12px; }
.copy {
    height: 26px; padding: 0 10px;
    border: 1px solid var(--line-strong); border-radius: 2px;
    background: transparent; color: var(--dim);
    font-family: var(--mono); font-size: 10.5px; letter-spacing: .1em;
    cursor: pointer; transition: color .15s ease, border-color .15s ease;
}
.copy:hover:not(:disabled) { color: var(--accent); border-color: var(--accent); }
.copy:focus-visible { outline: 1px solid var(--accent); outline-offset: 2px; }
.copy:disabled { opacity: .3; cursor: not-allowed; }

.note { margin: 12px 0 0; font-family: var(--mono); font-size: 11.5px; color: var(--err); }
.note[hidden] { display: none; }
.hint { margin: 10px 0 0; font-family: var(--mono); font-size: 11.5px; color: var(--dim); }

section.block { margin-top: 52px; }
section.block h2 {
    margin: 0 0 14px; font-size: 15.5px; font-weight: 650; letter-spacing: .01em;
    padding-top: 18px; border-top: 1px solid var(--line);
}
section.block h2::before { content: "// "; font-family: var(--mono); color: var(--accent); font-weight: 400; }
section.block p, section.block li { color: var(--muted); font-size: 14.5px; }
section.block p { margin: 0 0 12px; max-width: 46em; }
section.block ul, section.block ol { margin: 0 0 12px; padding-left: 1.3em; }
section.block li { margin: 3px 0; }
section.block li::marker { color: var(--dim); font-family: var(--mono); }
code {
    font-family: var(--mono); font-size: .88em;
    color: var(--accent); background: #14171b;
    padding: 2px 6px; border-radius: 2px;
    word-break: break-all;
}

.facts { margin: 18px 0 0; padding: 0; list-style: none; border-top: 1px solid var(--line); }
.facts li {
    display: grid; grid-template-columns: 190px 1fr; gap: 6px 20px;
    padding: 13px 0; border-bottom: 1px solid var(--line);
}
.facts b {
    font-family: var(--mono); font-size: 12px; font-weight: 500;
    color: var(--accent); letter-spacing: .02em;
}
.facts span { color: var(--muted); font-size: 14px; }

.faq { margin-top: 4px; border-top: 1px solid var(--line); }
.faq details { border-bottom: 1px solid var(--line); }
.faq summary {
    display: flex; align-items: baseline; justify-content: space-between; gap: 14px;
    padding: 14px 0; cursor: pointer; list-style: none;
    font-size: 14.5px; color: var(--text);
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after {
    content: "[+]"; font-family: var(--mono); font-size: 11px;
    color: var(--dim); flex: 0 0 auto;
}
.faq details[open] summary::after { content: "[-]"; color: var(--accent); }
.faq details p { margin: 0 0 16px; color: var(--muted); font-size: 14px; max-width: 48em; }

.repos { margin-top: 4px; border-top: 1px solid var(--line); }
.repo {
    display: grid; grid-template-columns: 1fr auto; gap: 4px 16px;
    padding: 15px 0; border-bottom: 1px solid var(--line); color: var(--text);
}
.repo:hover { text-decoration: none; }
.repo-name {
    display: inline-flex; align-items: baseline; gap: 9px;
    font-family: var(--mono); font-size: 13.5px; color: var(--text);
}
.repo-name::before { content: "→"; color: var(--dim); }
.repo:hover .repo-name { color: var(--accent); }
.repo:hover .repo-name::before { color: var(--accent); }
.repo-desc { grid-column: 1 / -1; margin: 0; color: var(--muted); font-size: 13.5px; }
.repo-meta {
    font-family: var(--mono); font-size: 10.5px; letter-spacing: .1em;
    text-transform: uppercase; color: var(--dim); white-space: nowrap;
}

footer {
    margin-top: 56px; padding: 18px 0 44px;
    border-top: 1px solid var(--line);
    font-family: var(--mono); font-size: 11.5px; color: var(--dim);
}
footer .rows { display: flex; flex-wrap: wrap; gap: 6px 18px; }
footer a { color: var(--dim); }
footer a:hover { color: var(--accent); }

.sr-only {
    position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
    overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0;
}

.qrs { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 18px; max-width: 426px; margin-top: 4px; }
.qr { margin: 0; }
.qr img {
    display: block; width: 100%; height: auto;
    background: #fff; padding: 5px;
    border: 1px solid var(--line-strong); border-radius: 2px;
}
.qr figcaption {
    margin-top: 8px; font-family: var(--mono); font-size: 10.5px;
    letter-spacing: .14em; color: var(--dim);
}

@media (max-width: 640px) {
    .hero { padding-top: 28px; }
    .iptable .col-label { width: 64px; }
    .iptable thead th { padding: 11px 8px; font-size: 10px; letter-spacing: .1em; }
    .iptable thead th.corner { padding: 11px 0; }
    .iptable thead th .st { margin-left: 5px; font-size: 10px; }
    .iptable tbody th { padding: 11px 8px; font-size: 11.5px; }
    .iptable tbody td { padding: 11px 8px; font-size: 12.5px; }
    .ip { font-size: 12.5px; }
    .ip[data-state="loading"], .ip[data-state="error"] { font-size: 11.5px; }
    .copy { height: 24px; padding: 0 8px; font-size: 10px; }
    .cell-ip { gap: 6px; }
    .panel-title { margin-right: auto; }
    .summary { order: 3; width: 100%; margin: 0; }
    .panel-head .btn { order: 2; }
    .facts li { grid-template-columns: 1fr; gap: 2px; }
    .repo { grid-template-columns: 1fr; }
    .repo-meta { order: 3; }
    .qrs { gap: 12px; }
}
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after { animation: none !important; transition: none !important; }
}