/* Cytracom's palette and type (cytracom.com: IBM Plex, primary #4c32df). Light by default,
   dark from the system or the toggle (data-theme on <html>). */
@font-face { font-family: "IBM Plex Sans"; font-weight: 400; font-display: swap; src: url(../fonts/ibm-plex-sans-latin-400-normal.woff2) format("woff2"); }
@font-face { font-family: "IBM Plex Sans"; font-weight: 500; font-display: swap; src: url(../fonts/ibm-plex-sans-latin-500-normal.woff2) format("woff2"); }
@font-face { font-family: "IBM Plex Sans"; font-weight: 600; font-display: swap; src: url(../fonts/ibm-plex-sans-latin-600-normal.woff2) format("woff2"); }
@font-face { font-family: "IBM Plex Mono"; font-weight: 400; font-display: swap; src: url(../fonts/ibm-plex-mono-latin-400-normal.woff2) format("woff2"); }
@font-face { font-family: "IBM Plex Mono"; font-weight: 500; font-display: swap; src: url(../fonts/ibm-plex-mono-latin-500-normal.woff2) format("woff2"); }

:root {
  --primary: #4c32df;
  --primary-soft: #f3f1ff;
  --primary-ink: #fff;
  --up: #009767;
  --bg: #fff;
  --bg-alt: #f6f7fb;
  --surface: #fff;
  --strip: #1e2030;
  --text: #12131e;
  --muted: #575a6a;
  --border: #dadde7;
  --grid: rgba(163, 168, 184, 0.22);
  --land: #e6e8ef;
  --land-edge: #cbcfdc;
  --good: #0f9f65;
  --fair: #c77700;
  --poor: #d92d4e;
  --idle: #a3a8b8;
  --shadow: 0 1px 2px rgba(18, 19, 30, 0.06), 0 8px 24px rgba(18, 19, 30, 0.06);
  --sans: "IBM Plex Sans", ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --mono: "IBM Plex Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --primary: #8a78f0; --primary-soft: rgba(138, 120, 240, 0.14); --primary-ink: #12131e; --up: #00d294;
    --bg: #12131e; --bg-alt: #171826; --surface: #1e2030; --strip: #0b0c14; --text: #f6f7fb; --muted: #9ea3b4;
    --border: #3d4155; --grid: rgba(117, 122, 141, 0.16); --land: #262839; --land-edge: #3f4250;
    --good: #37ca8d; --fair: #f59e0b; --poor: #f4395b; --idle: #575a6a;
    --shadow: 0 1px 2px rgba(0, 0, 0, 0.3), 0 8px 24px rgba(0, 0, 0, 0.25);
    color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --primary: #8a78f0; --primary-soft: rgba(138, 120, 240, 0.14); --primary-ink: #12131e; --up: #00d294;
  --bg: #12131e; --bg-alt: #171826; --surface: #1e2030; --strip: #0b0c14; --text: #f6f7fb; --muted: #9ea3b4;
  --border: #3d4155; --grid: rgba(117, 122, 141, 0.16); --land: #262839; --land-edge: #3f4250;
  --good: #37ca8d; --fair: #f59e0b; --poor: #f4395b; --idle: #575a6a;
  --shadow: 0 1px 2px rgba(0, 0, 0, 0.3), 0 8px 24px rgba(0, 0, 0, 0.25);
  color-scheme: dark;
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body { margin: 0; background: var(--bg); color: var(--text); font: 400 16px/1.55 var(--sans); }
a { color: inherit; }
h1, h2, h3 { margin: 0; font-weight: 600; letter-spacing: -0.01em; line-height: 1.15; }
h2 { font-size: 1.6rem; }
h3 { font-size: 1rem; }
p { margin: 0; }
.mono { font-family: var(--mono); }
.muted { color: var(--muted); }
.wrap { width: min(1180px, 100% - 32px); margin-inline: auto; }
[hidden] { display: none !important; }
:focus-visible { outline: 2px solid var(--primary); outline-offset: 2px; }

/* top strip and header, as cytracom.com */
.strip { background: var(--strip); color: #cbcfdc; font-size: 0.8125rem; }
.strip__inner { display: flex; justify-content: space-between; align-items: center; gap: 16px; min-height: 36px; }
.strip nav { display: flex; gap: 18px; }
.strip a { color: #f6f7fb; text-decoration: none; }
.strip a:hover { text-decoration: underline; }
.top { background: var(--bg); border-bottom: 1px solid var(--border); position: sticky; top: 0; z-index: 5; }
.top__inner { display: flex; align-items: center; gap: 16px; min-height: 72px; }
.brand { display: inline-flex; color: var(--text); }
.wordmark { width: 150px; height: 18px; display: block; }
.brand__product { padding-left: 16px; border-left: 1px solid var(--border); font-weight: 500; }
.top__actions { margin-left: auto; display: flex; gap: 8px; align-items: center; }

/* buttons */
.btn { text-decoration: none; font: 500 0.9375rem/1 var(--sans); border: 1px solid var(--text); background: transparent; color: var(--text);
  padding: 10px 14px; border-radius: 2px; cursor: pointer; display: inline-flex; align-items: center; gap: 8px; }
.btn:hover:not(:disabled) { background: var(--bg-alt); }
.btn:disabled { opacity: 0.45; cursor: not-allowed; }
.btn--primary { background: var(--primary); border-color: var(--primary); color: var(--primary-ink); }
.btn--primary:hover:not(:disabled) { background: var(--primary); filter: brightness(1.1); }
.btn--lg { padding: 14px 22px; font-size: 1rem; }
.btn--ghost { border-color: var(--border); }
.btn--icon { border-color: var(--border); padding: 8px; }
.btn--icon svg { width: 20px; height: 20px; fill: none; stroke: currentColor; stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; }
.btn--icon .moon { display: none; }
:root[data-theme="dark"] .btn--icon .moon { display: inline; }
:root[data-theme="dark"] .btn--icon .sun { display: none; }

/* hero: the grid of cytracom.com's */
.hero { background-color: var(--bg-alt); border-bottom: 1px solid var(--border);
  background-image: linear-gradient(var(--grid) 1px, transparent 1px), linear-gradient(90deg, var(--grid) 1px, transparent 1px);
  background-size: 88px 88px; background-position: center top; }
.hero__inner { padding: 64px 0 56px; text-align: center; }
.eyebrow { display: inline-block; font: 500 0.8125rem/1 var(--mono); text-transform: uppercase; letter-spacing: 0.08em;
  color: var(--primary); background: var(--primary-soft); padding: 7px 12px; border-radius: 999px; }
.hero h1 { font-size: clamp(2rem, 1.2rem + 3vw, 3.25rem); margin: 18px auto 14px; max-width: 32ch; text-wrap: balance; }
.lede { color: var(--muted); font-size: 1.125rem; max-width: 60ch; margin-inline: auto; }
.facts { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 16px; max-width: 760px; margin: 36px auto 0; text-align: left; }
.fact { background: var(--surface); border: 1px solid var(--border); padding: 18px 20px; display: grid; gap: 4px; align-content: start; box-shadow: var(--shadow); min-width: 0; }
.fact--accent { border-color: var(--primary); }
.fact__label { font-size: 0.8125rem; color: var(--muted); }
.fact__value { font-size: 1.375rem; font-weight: 600; overflow-wrap: anywhere; }
.fact__sub { font-size: 0.875rem; color: var(--muted); overflow-wrap: anywhere; min-height: 1.3em; }
.fact__as { display: grid; gap: 2px; margin-top: 6px; padding-top: 10px; border-top: 1px solid var(--border); overflow-wrap: anywhere; }
.fact__as .mono { font-weight: 600; }

/* sections */
.section { padding: 64px 0; scroll-margin-top: 72px; }
.section--alt { background: var(--bg-alt); border-block: 1px solid var(--border); }
.section__head { display: flex; justify-content: space-between; align-items: end; gap: 16px; margin-bottom: 24px; }
.section__head p { margin-top: 6px; max-width: 70ch; }
.card { background: var(--surface); border: 1px solid var(--border); box-shadow: var(--shadow); }
.notice { border-left: 3px solid var(--fair); background: var(--surface); padding: 12px 16px; margin-bottom: 16px; font-size: 0.9375rem; }

/* POPs: map and ranking */
.pops { display: grid; grid-template-columns: minmax(0, 1.7fr) minmax(0, 1fr); gap: 16px; }
.map { margin: 0; padding: 12px; }
#map { display: block; width: 100%; height: auto; }
#map-land .land { fill: var(--land); stroke: var(--land-edge); stroke-width: 1; }
#map-land .borders { fill: none; stroke: var(--bg); stroke-width: 1.2; }
.pin { cursor: pointer; }
.pin circle.dot { fill: var(--idle); stroke: var(--surface); stroke-width: 3; transition: fill 0.3s; }
.pin circle.halo { fill: none; stroke: var(--primary); stroke-width: 2; opacity: 0; }
.pin text { font: 600 22px var(--mono); fill: var(--text); paint-order: stroke; stroke: var(--surface); stroke-width: 6px; stroke-linejoin: round; }
.pin text.ms { font: 500 18px var(--mono); fill: var(--muted); }
.pin[data-grade="good"] circle.dot { fill: var(--good); }
.pin[data-grade="fair"] circle.dot { fill: var(--fair); }
.pin[data-grade="poor"] circle.dot { fill: var(--poor); }
.pin[data-state="measuring"] circle.dot { animation: blink 1s ease-in-out infinite; }
.pin[data-best] circle.halo { opacity: 1; animation: ring 2.4s ease-out infinite; transform-box: fill-box; transform-origin: center; }
.pin[aria-pressed="true"] circle.dot { stroke: var(--primary); }
@keyframes blink { 50% { opacity: 0.35; } }
@keyframes ring { 0% { transform: scale(0.6); opacity: 0.9; } 100% { transform: scale(2.2); opacity: 0; } }

.ranking { list-style: none; margin: 0; padding: 8px; display: grid; align-content: start; gap: 2px; }
.rank__btn { width: 100%; display: grid; grid-template-columns: 3.4em minmax(0, 1fr) 26% 6.4em; gap: 10px; align-items: center;
  padding: 12px 10px; background: none; border: 1px solid transparent; color: inherit; font: inherit; text-align: left; cursor: pointer; }
.rank__btn:hover { background: var(--bg-alt); }
.rank[aria-current="true"] .rank__btn { border-color: var(--primary); background: var(--primary-soft); }
.rank__code { font-weight: 600; }
.rank__city { color: var(--muted); font-size: 0.9375rem; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.rank__bar { height: 6px; background: var(--bg-alt); border-radius: 3px; overflow: hidden; }
.rank__bar span { display: block; height: 100%; width: 0; background: var(--idle); border-radius: 3px; transition: width 0.5s, background 0.3s; }
.rank[data-grade="good"] .rank__bar span { background: var(--good); }
.rank[data-grade="fair"] .rank__bar span { background: var(--fair); }
.rank[data-grade="poor"] .rank__bar span { background: var(--poor); }
.rank__ms { text-align: right; font-size: 0.9375rem; white-space: nowrap; }
.rank[data-state="unavailable"] .rank__ms { color: var(--muted); font-family: var(--sans); font-size: 0.8125rem; }

/* pickers */
.picker { display: flex; flex-wrap: wrap; gap: 6px; }
.picker button { font: 500 0.9375rem/1 var(--mono); padding: 9px 12px; border: 1px solid var(--border); background: var(--surface);
  color: var(--text); border-radius: 2px; cursor: pointer; }
.picker button small { font-family: var(--sans); color: var(--muted); font-weight: 400; margin-left: 6px; }
.picker button[aria-checked="true"] { border-color: var(--primary); background: var(--primary-soft); color: var(--primary); }
.picker button:disabled { opacity: 0.45; cursor: not-allowed; }
.picker--small button { font-size: 0.8125rem; padding: 8px 10px; }

/* speed test */
.speed { padding: 24px; display: grid; gap: 24px; }
.gauges { display: grid; grid-template-columns: 1fr 1fr minmax(180px, 0.8fr); gap: 16px; align-items: center; }
.gauge { position: relative; text-align: center; }
.gauge svg { width: 100%; max-width: 280px; display: block; margin: 0 auto; overflow: visible; }
.gauge path { fill: none; stroke-width: 14; stroke-linecap: round; }
.gauge__track { stroke: var(--border); opacity: 0.6; }
.gauge__value { stroke: var(--primary); stroke-dasharray: 100 100; stroke-dashoffset: 100; opacity: 0; transition: stroke-dashoffset 0.2s linear; }
.gauge--up .gauge__value { stroke: var(--up); }
.gauge__read { position: absolute; left: 0; right: 0; top: 42%; display: grid; justify-items: center; }
.gauge__num { font-size: clamp(1.75rem, 1rem + 2vw, 2.75rem); font-weight: 500; line-height: 1; }
.gauge__unit { color: var(--muted); font-size: 0.875rem; margin-top: 4px; }
.gauge__label { font-weight: 600; margin-top: -6px; }
.stats { margin: 0; display: grid; gap: 14px; }
.stats div { border-left: 3px solid var(--border); padding-left: 12px; }
.stats dt { color: var(--muted); font-size: 0.8125rem; }
.stats dd { margin: 0; font-size: 1.375rem; font-weight: 500; }
.spark { width: 100%; height: 60px; display: block; border-bottom: 1px solid var(--border); }
.spark polyline { fill: none; stroke-width: 2; vector-effect: non-scaling-stroke; }
.spark__down { stroke: var(--primary); }
.spark__up { stroke: var(--up); }
.speed__foot { display: flex; align-items: center; gap: 18px; flex-wrap: wrap; }

/* return path */
.trace { padding: 24px; display: grid; gap: 16px; }
.speed > *, .trace > *, #traces > * { min-width: 0; } /* a wide table scrolls in its card, not the page */
.trace__controls { display: flex; flex-wrap: wrap; gap: 12px; align-items: center; }
#traces { display: grid; gap: 16px; }
.hops { border: 1px solid var(--border); }
.hops__head { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 6px 16px; padding: 12px 16px; background: var(--bg-alt); border-bottom: 1px solid var(--border); }
.hops__meta { color: var(--muted); font-size: 0.8125rem; overflow-wrap: anywhere; }
.hops__error { padding: 14px 16px; color: var(--poor); }
.hops[data-state="running"] .hops__title::after { content: " · tracing…"; color: var(--muted); font-weight: 400; animation: blink 1.2s infinite; }
.hops__scroll { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; font-size: 0.875rem; }
th, td { padding: 8px 12px; text-align: left; border-bottom: 1px solid var(--border); white-space: nowrap; }
th { color: var(--muted); font-weight: 500; font-size: 0.8125rem; }
td { font-family: var(--mono); }
tr:last-child td { border-bottom: 0; }
.num { text-align: right; }
td.host { white-space: normal; overflow-wrap: anywhere; min-width: 16ch; }
td.host small { display: block; color: var(--muted); }
tr[data-loss="some"] td.loss { color: var(--fair); }
tr[data-loss="all"] td { color: var(--muted); }

/* command line: pick a test, a location and a system */
.cli { padding: 24px; display: grid; gap: 20px; }
.cli > * { min-width: 0; }
.cli__pick { display: grid; grid-template-columns: max-content minmax(0, 1fr); gap: 12px 20px; align-items: center; }
.cli__label { font-size: 0.8125rem; color: var(--muted); }
.cli__cmds { display: grid; gap: 12px; }
.cmd { display: grid; gap: 4px; }
.cmd__label { font-size: 0.8125rem; color: var(--muted); }
.cmd__row { display: flex; align-items: stretch; border: 1px solid var(--border); background: var(--bg-alt); min-width: 0; }
.cmd code { flex: 1; font: 0.8125rem/1.4 var(--mono); padding: 8px 10px; overflow-x: auto; white-space: nowrap; }
.cmd button { border: 0; border-left: 1px solid var(--border); background: none; color: var(--muted); font: 500 0.75rem var(--sans); padding: 0 10px; cursor: pointer; }
.cmd button:hover { color: var(--primary); }

/* help and demo */
.help__inner { display: grid; grid-template-columns: 1fr 1fr; gap: 24px 64px; }
.help__col { display: grid; gap: 14px; align-content: start; }
.help__list { list-style: none; margin: 0; padding: 0; display: grid; gap: 10px; }
.help__list li { display: grid; }
.help__list a { font-weight: 500; text-decoration-color: var(--border); text-underline-offset: 3px; }
.help__list a:hover { text-decoration-color: currentColor; }
.help__list .muted { font-size: 0.875rem; }
.help__actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 4px; }

/* footer */
.foot { padding: 40px 0; border-top: 1px solid var(--border); }
.foot__inner { display: flex; flex-wrap: wrap; align-items: center; gap: 16px 28px; }
.foot nav { display: flex; flex-wrap: wrap; gap: 18px; font-size: 0.9375rem; }
.foot nav a { text-decoration: none; color: var(--muted); }
.foot nav a:hover { color: var(--text); }
.foot p { margin-left: auto; font-size: 0.875rem; }
.foot .foot__legal { flex-basis: 100%; margin-left: 0; font-size: 0.8125rem; }

.strip__demo { display: none; }

@media (max-width: 900px) {
  .pops { grid-template-columns: 1fr; }
  .help__inner { grid-template-columns: 1fr; }
  .gauges { grid-template-columns: 1fr 1fr; }
  .stats { grid-column: 1 / -1; grid-template-columns: repeat(3, 1fr); }
}
@media (max-width: 640px) {
  .strip__inner > span { display: none; }
  .strip__inner { justify-content: flex-end; }
  .strip__demo { display: inline; }
  .strip__reg, .top__demo { display: none; }
  .wordmark { width: 118px; height: 15px; }
  .brand__product { padding-left: 12px; font-size: 0.9375rem; }
  #copy-report { display: none; }
  .hero__inner { padding: 44px 0 40px; }
  .facts { grid-template-columns: 1fr; }
  .section { padding: 44px 0; }
  .section__head { flex-direction: column; align-items: stretch; }
  .speed, .trace, .cli { padding: 16px; }
  .cli__pick { grid-template-columns: 1fr; gap: 6px; }
  .cli__label:not(:first-child) { margin-top: 10px; }
  .gauges { grid-template-columns: 1fr; }
  .stats { grid-template-columns: 1fr 1fr 1fr; }
  .pin text { font-size: 40px; stroke-width: 10px; }
  .pin text.ms { display: none; }
  .foot p { margin-left: 0; }
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition: none !important; }
}