:root {
  --g-blue:#4285F4; --g-red:#EA4335; --g-yellow:#FBBC05; --g-green:#34A853;
  --ink:#1d1d1f; --ink-soft:#6e6e73; --ink-faint:#86868b;
  --card:rgba(255,255,255,0.62); --card-brd:rgba(255,255,255,0.7);
  --chip:rgba(0,0,0,0.035); --chip-brd:rgba(0,0,0,0.06);
  --row-brd:rgba(0,0,0,0.06);
  --shadow:0 30px 80px -28px rgba(20,30,60,0.35);
  --bg:#f3f4f8; --mesh-opacity:0.5;
}
/* Dark palette: auto from the system UNLESS the user forced light, and always
   when the user explicitly chose dark (data-theme set by the toggle). */
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --ink:#f5f5f7; --ink-soft:#a1a1a6; --ink-faint:#86868b;
    --card:rgba(28,28,32,0.55); --card-brd:rgba(255,255,255,0.10);
    --chip:rgba(255,255,255,0.05); --chip-brd:rgba(255,255,255,0.10);
    --row-brd:rgba(255,255,255,0.08);
    --shadow:0 30px 80px -28px rgba(0,0,0,0.6); --bg:#0b0b0f; --mesh-opacity:0.38;
  }
}
:root[data-theme="dark"] {
  --ink:#f5f5f7; --ink-soft:#a1a1a6; --ink-faint:#86868b;
  --card:rgba(28,28,32,0.55); --card-brd:rgba(255,255,255,0.10);
  --chip:rgba(255,255,255,0.05); --chip-brd:rgba(255,255,255,0.10);
  --row-brd:rgba(255,255,255,0.08);
  --shadow:0 30px 80px -28px rgba(0,0,0,0.6); --bg:#0b0b0f; --mesh-opacity:0.38;
}

* { box-sizing:border-box; margin:0; padding:0; }
html,body { min-height:100%; }
body {
  font-family:-apple-system,BlinkMacSystemFont,"SF Pro Display","Segoe UI",Roboto,Helvetica,Arial,sans-serif;
  color:var(--ink); background:var(--bg);
  -webkit-font-smoothing:antialiased; text-rendering:optimizeLegibility;
  padding:40px 20px; position:relative; overflow-x:hidden;
  min-height:100vh; min-height:100dvh; display:flex; flex-direction:column;
}

.mesh {
  position:fixed; inset:-25%; z-index:0; filter:blur(64px) saturate(125%);
  background:
    radial-gradient(38% 38% at 18% 22%, var(--g-blue) 0%, transparent 60%),
    radial-gradient(34% 34% at 82% 16%, var(--g-red) 0%, transparent 60%),
    radial-gradient(40% 40% at 80% 84%, var(--g-yellow) 0%, transparent 60%),
    radial-gradient(42% 42% at 20% 82%, var(--g-green) 0%, transparent 60%);
  opacity:var(--mesh-opacity); animation:drift 20s ease-in-out infinite alternate;
}
@keyframes drift { from{transform:translate3d(0,0,0) scale(1);} to{transform:translate3d(0,-3%,0) scale(1.08);} }
@media (prefers-reduced-motion: reduce){ .mesh{animation:none;} .card,.hero{animation:none!important;} }

/* margin:auto centers the content both ways and stays scroll-safe (no clipped
   top) when the content is taller than the viewport. */
.wrap { position:relative; z-index:1; width:min(900px,100%); margin:auto; }

/* masthead */
.masthead { display:flex; align-items:center; justify-content:space-between; margin-bottom:30px; gap:12px; }
.brand { display:flex; align-items:center; gap:10px; font-weight:600; letter-spacing:-0.01em; }
.logo { display:grid; place-items:center; width:34px; height:34px; border-radius:11px;
  color:#fff; background:linear-gradient(135deg,var(--g-blue),var(--g-green)); box-shadow:0 6px 18px -6px var(--g-blue); }
.brand-name { font-size:17px; }
.pill { display:inline-flex; align-items:center; gap:8px; font-size:13px; font-weight:500;
  color:var(--ink-soft); background:var(--chip); border:1px solid var(--chip-brd);
  padding:7px 13px; border-radius:999px; }
.pill strong { color:var(--ink); font-weight:650; }
.pill .dot { width:8px; height:8px; border-radius:50%; background:var(--g-green);
  box-shadow:0 0 0 0 color-mix(in srgb,var(--g-green) 55%,transparent); animation:pulse 2s infinite; }
@keyframes pulse { 0%{box-shadow:0 0 0 0 color-mix(in srgb,var(--g-green) 55%,transparent);} 70%{box-shadow:0 0 0 9px transparent;} 100%{box-shadow:0 0 0 0 transparent;} }

/* theme toggle */
.actions { display:flex; align-items:center; gap:10px; }
.theme-toggle { display:grid; place-items:center; width:36px; height:36px; border-radius:11px;
  cursor:pointer; color:var(--ink-soft); background:var(--chip); border:1px solid var(--chip-brd);
  transition:color .15s, background .15s, border-color .15s; }
.theme-toggle:hover { color:var(--ink); border-color:var(--ink-faint); }
.theme-toggle svg { display:block; }
.icon-sun { display:none; }
.icon-moon { display:block; }
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) .icon-sun { display:block; }
  :root:not([data-theme="light"]) .icon-moon { display:none; }
}
:root[data-theme="dark"] .icon-sun { display:block; }
:root[data-theme="dark"] .icon-moon { display:none; }
:root[data-theme="light"] .icon-sun { display:none; }
:root[data-theme="light"] .icon-moon { display:block; }

/* hero */
.hero { text-align:center; padding:18px 0 34px; animation:rise .6s cubic-bezier(.16,1,.3,1) both; }
@keyframes rise { from{opacity:0; transform:translateY(14px);} to{opacity:1; transform:none;} }
.kicker { font-size:13px; font-weight:600; letter-spacing:.06em; text-transform:uppercase; color:var(--ink-faint); margin-bottom:10px; }
.hero-ip { font-size:clamp(30px,7vw,52px); font-weight:700; letter-spacing:-0.02em; line-height:1.02;
  font-variant-numeric:tabular-nums; word-break:break-all;
  font-family:ui-monospace,"SF Mono","Roboto Mono",Menlo,monospace; }
.hero-sub { margin-top:10px; font-size:17px; color:var(--ink-soft); min-height:22px; }

/* grid + cards */
.grid { display:grid; grid-template-columns:1fr 1fr; gap:16px; }
@media (max-width:680px){ .grid{grid-template-columns:1fr;} }
.card {
  background:var(--card); border:1px solid var(--card-brd); border-radius:24px;
  padding:22px 22px 8px; box-shadow:var(--shadow);
  backdrop-filter:blur(40px) saturate(180%); -webkit-backdrop-filter:blur(40px) saturate(180%);
  animation:rise .6s cubic-bezier(.16,1,.3,1) both;
}
#card-ipv6 { animation-delay:.06s; }
.card-head { display:flex; align-items:center; gap:10px; margin-bottom:8px; }
.card-head h2 { font-size:20px; font-weight:680; letter-spacing:-0.01em; }
.badge { font-size:11px; font-weight:700; letter-spacing:.04em; padding:3px 8px; border-radius:7px; color:#fff; }
.badge.v4 { background:var(--g-blue); }
.badge.v6 { background:var(--g-green); }
.state { margin-left:auto; font-size:12.5px; font-weight:600; color:var(--ink-faint); }
.state.ok { color:var(--g-green); }
.state.err { color:var(--g-red); }

.rows { display:flex; flex-direction:column; }
.row { display:grid; grid-template-columns:130px 1fr; gap:12px; align-items:center;
  padding:11px 2px; border-top:1px solid var(--row-brd); }
.row:first-child { border-top:none; }
.row dt { font-size:12px; font-weight:600; letter-spacing:.04em; text-transform:uppercase; color:var(--ink-faint); }
.row dd { font-size:14.5px; font-weight:550; word-break:break-word;
  font-family:ui-monospace,"SF Mono","Roboto Mono",Menlo,monospace; display:flex; align-items:center; gap:8px; }
.row dd a { color:var(--g-blue); text-decoration:none; }
.row dd a:hover { text-decoration:underline; }
.muted { color:var(--ink-faint); font-style:normal; }

.copyable { cursor:pointer; border-bottom:1px dotted var(--ink-faint); transition:color .15s,border-color .15s; }
.copyable:hover { color:var(--g-blue); border-bottom-color:var(--g-blue); }
.copyable.copied { color:var(--g-green); border-bottom-color:transparent; }
.copied-tag { font-size:11px; font-weight:600; color:var(--g-green); }

/* skeleton loading */
.skeleton .row dd { color:transparent; }
.skeleton .row dd::after { content:""; display:block; height:12px; width:70%; border-radius:6px;
  background:linear-gradient(90deg,var(--chip),var(--chip-brd),var(--chip)); background-size:200% 100%;
  animation:shimmer 1.3s infinite; }
@keyframes shimmer { from{background-position:200% 0;} to{background-position:-200% 0;} }

.foot { margin-top:26px; text-align:center; font-size:13px; color:var(--ink-faint); }
.foot a { color:var(--g-blue); text-decoration:none; }
.foot a:hover { text-decoration:underline; }
.foot .sep { margin:0 8px; opacity:.5; }