/* Tokens follow the app (src/app/globals.css): cool greys, one violet
   accent. The heat map gradient is the only loud colour on the page. */
:root {
  --bg: #f6f7f9;
  --surface: #ffffff;
  --ink: #181c25;
  --muted: #5a6272;
  --rule: #e1e4ea;
  --brand: #6a55d6;
  --brand-ink: #ffffff;
  --brand-soft: #efecfc;
  --plan-wall: #2a2f3a;
  --plan-floor: #fbfbfc;
  --good: #1f9d5a;
  --bad: #d8453a;
  --shadow: 0 1px 2px rgb(20 24 35 / 0.06), 0 8px 24px -12px rgb(20 24 35 / 0.18);
  --radius: 10px;
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI Variable Text", "Segoe UI", system-ui, "Helvetica Neue", Arial, sans-serif;
  --display: ui-rounded, "SF Pro Rounded", -apple-system, BlinkMacSystemFont, "Segoe UI Variable Display", "Segoe UI", system-ui, sans-serif;
  --mono: ui-monospace, "SF Mono", "Cascadia Mono", "JetBrains Mono", Menlo, Consolas, monospace;
  color-scheme: light dark;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #14161b;
    --surface: #1c1f26;
    --ink: #e7e9ee;
    --muted: #9aa2b1;
    --rule: #2b2f38;
    --brand: #a493f2;
    --brand-ink: #15171c;
    --brand-soft: #2a2640;
    --plan-wall: #d9dce3;
    --plan-floor: #1f222a;
    --good: #3ccf7f;
    --bad: #f06a5e;
    --shadow: 0 1px 2px rgb(0 0 0 / 0.4), 0 10px 30px -14px rgb(0 0 0 / 0.7);
  }
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font: 400 17px/1.6 var(--sans);
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; height: auto; display: block; }
a { color: var(--brand); text-underline-offset: 0.18em; text-decoration-thickness: 1px; }
a:hover { text-decoration-thickness: 2px; }
:focus-visible { outline: 2px solid var(--brand); outline-offset: 3px; border-radius: 4px; }
code { font-family: var(--mono); font-size: 0.88em; }
p code, dd code, li code { background: var(--brand-soft); padding: 0.1em 0.35em; border-radius: 4px; }
h1, h2, h3 { font-family: var(--display); line-height: 1.15; margin: 0; }

.wrap { width: 100%; max-width: 1120px; margin: 0 auto; padding: 0 24px; }
@media (max-width: 600px) { .wrap { padding: 0 16px; } }

.skip { position: absolute; left: -9999px; }
.skip:focus { left: 16px; top: 12px; z-index: 10; background: var(--surface); padding: 8px 12px; }

/* Header */
.site-header { border-bottom: 1px solid var(--rule); background: color-mix(in srgb, var(--bg) 88%, transparent); backdrop-filter: blur(8px); position: sticky; top: 0; z-index: 5; }
.site-header__inner { display: flex; align-items: center; justify-content: space-between; gap: 16px; height: 60px; }
.brand { display: flex; align-items: center; gap: 10px; color: var(--ink); text-decoration: none; font: 600 17px/1 var(--display); white-space: nowrap; }
.brand img { border-radius: 7px; }
.site-header nav { display: flex; gap: 22px; font-size: 15px; }
.site-header nav a { color: var(--muted); text-decoration: none; }
.site-header nav a:hover { color: var(--ink); }
@media (max-width: 760px) {
  .site-header nav a:not(.nav-gh):not([href$="#download"]):not([href^="/docs"]) { display: none; }
  .site-header nav { gap: 16px; }
}
/* Phones: the name and three links don't fit in 375 px; keep Download and Docs */
@media (max-width: 480px) {
  .site-header__inner { gap: 12px; }
  .brand { gap: 8px; font-size: 16px; min-width: 0; }
  .brand span { overflow: hidden; text-overflow: ellipsis; }
  .site-header nav { gap: 14px; flex-shrink: 0; }
  .site-header nav .nav-gh { display: none; }
}

/* Buttons */
.cta { display: flex; flex-wrap: wrap; gap: 12px; align-items: center; }
.button {
  display: inline-flex; align-items: center; justify-content: center;
  min-height: 46px; padding: 0 22px; border-radius: 999px;
  background: var(--brand); color: var(--brand-ink);
  font-weight: 600; font-size: 16px; text-decoration: none;
  border: 1px solid transparent;
  transition: transform 120ms ease, background-color 120ms ease;
}
.button:hover { text-decoration: none; filter: brightness(1.06); }
.button:active { transform: translateY(1px); }
.button--quiet { background: transparent; color: var(--ink); border-color: var(--rule); }
.button--quiet:hover { background: var(--surface); filter: none; }
.linkish { background: none; border: 0; padding: 0; font: inherit; color: var(--brand); cursor: pointer; text-decoration: underline; text-underline-offset: 0.18em; }

/* Hero */
.hero { display: grid; grid-template-columns: minmax(0, 5fr) minmax(0, 6fr); gap: 56px; align-items: center; padding-top: 72px; padding-bottom: 56px; }
.hero h1 { font-size: clamp(2.5rem, 5.4vw, 4rem); font-weight: 700; letter-spacing: -0.025em; max-width: 11ch; }
.lede { font-size: 19px; color: var(--muted); margin: 22px 0 30px; max-width: 34em; }
.fineprint { font-size: 14px; color: var(--muted); margin: 16px 0 0; }
@media (max-width: 900px) {
  .hero { grid-template-columns: 1fr; gap: 40px; padding-top: 44px; }
}

/* Interactive demo: canvas heat map under an SVG floor plan */
.demo { margin: 0; }
.demo__plan {
  position: relative; aspect-ratio: 100 / 62; width: 100%;
  background: var(--plan-floor); border: 1px solid var(--rule);
  border-radius: var(--radius); box-shadow: var(--shadow); overflow: hidden;
  cursor: crosshair; touch-action: manipulation;
}
.demo__plan canvas, .demo__plan svg { position: absolute; inset: 0; width: 100%; height: 100%; }
.demo__plan canvas { image-rendering: auto; }
.demo figcaption { display: flex; justify-content: space-between; gap: 16px; font-size: 14px; color: var(--muted); margin-top: 12px; }
.demo .wall { stroke: var(--plan-wall); stroke-width: 3px; stroke-linecap: square; fill: none; vector-effect: non-scaling-stroke; }
.demo .room { font: 500 2.1px var(--sans); fill: var(--plan-wall); opacity: 0.6; }
.demo .dot { stroke: #fff; stroke-width: 0.35; }
.demo .dot-label { font: 700 2.2px var(--sans); fill: var(--ink); paint-order: stroke; stroke: var(--plan-floor); stroke-width: 0.6px; }
.demo .pulse { fill: none; stroke: var(--brand); stroke-width: 0.4; animation: pulse 0.7s ease-out infinite; transform-box: fill-box; transform-origin: center; }
.demo .router { fill: var(--brand); }
@keyframes pulse { from { opacity: 1; transform: scale(0.4); } to { opacity: 0; transform: scale(1.6); } }
@keyframes pop { from { transform: scale(0); } to { transform: scale(1); } }
.demo .dot-new { animation: pop 220ms ease-out; transform-box: fill-box; transform-origin: center; }
@media (prefers-reduced-motion: reduce) {
  .demo .pulse, .demo .dot-new { animation: none; }
}

/* Screenshots */
.shot, .screenshot figure { margin: 0; }
.shot__frame { border: 1px solid var(--rule); border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow); background: var(--surface); }
.shot figcaption, .screenshot figcaption { font-size: 14px; color: var(--muted); margin-top: 12px; }
.shot--small { margin-top: 48px; max-width: 760px; }

/* Sections */
section[id] { scroll-margin-top: 76px; }
.section { padding-top: 96px; }
.section__head { max-width: 640px; margin-bottom: 36px; }
.section__head h2 { font-size: clamp(1.75rem, 3vw, 2.25rem); font-weight: 700; letter-spacing: -0.015em; }
.section__head p { color: var(--muted); margin: 10px 0 0; font-size: 18px; }
@media (max-width: 600px) { .section { padding-top: 72px; } }

.features { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 36px 40px; margin: 0; }
.features div { border-top: 2px solid var(--ink); padding-top: 14px; }
.features dt { font: 600 18px/1.3 var(--display); margin-bottom: 6px; }
.features dd { margin: 0; color: var(--muted); font-size: 16px; }
@media (max-width: 900px) { .features { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
@media (max-width: 560px) { .features { grid-template-columns: 1fr; } }

.steps { list-style: none; padding: 0; margin: 0; display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 32px; counter-reset: step; }
.steps li { counter-increment: step; }
.steps li::before {
  content: counter(step);
  display: grid; place-items: center; width: 34px; height: 34px; border-radius: 50%;
  background: var(--brand-soft); color: var(--brand); font: 700 16px/1 var(--display);
  margin-bottom: 14px;
}
.steps h3 { font-size: 18px; font-weight: 600; margin-bottom: 6px; }
.steps p { margin: 0; color: var(--muted); font-size: 16px; }
@media (max-width: 900px) { .steps { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
@media (max-width: 560px) { .steps { grid-template-columns: 1fr; } }

.under-hood { max-width: 680px; margin-top: 48px; }
.under-hood h3 { font-size: 18px; font-weight: 600; }
.under-hood p { color: var(--muted); margin: 8px 0 0; font-size: 16px; }

/* Signal only vs signal and speed: two small animated diagrams + table */
.visually-hidden { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }
.modes { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 20px; max-width: 880px; }
@media (max-width: 760px) { .modes { grid-template-columns: 1fr; } }
.mode { margin: 0; background: var(--surface); border: 1px solid var(--rule); border-radius: var(--radius); padding: 14px 14px 16px; }
.mode__art { display: block; width: 100%; height: auto; }
.mode figcaption { font-size: 15px; color: var(--muted); margin-top: 10px; }
.mode figcaption strong { color: var(--ink); }
.how-art { margin-bottom: 48px; }
.how-art .mode__art { aspect-ratio: 520 / 240; border-radius: 6px; }

/* Survey with an AI agent */
.agent { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 40px; align-items: start; max-width: 960px; }
@media (max-width: 760px) { .agent { grid-template-columns: 1fr; gap: 28px; } }
.chat { background: var(--surface); border: 1px solid var(--rule); border-radius: var(--radius); padding: 18px; display: grid; gap: 10px; margin: 0; font-size: 15px; }
.chat p { margin: 0; padding: 10px 14px; border-radius: 12px; max-width: 90%; }
.chat span { display: block; font-size: 12px; font-weight: 600; color: var(--muted); margin-bottom: 2px; }
.chat__you { justify-self: end; background: var(--brand-soft); }
.chat__agent { justify-self: start; background: var(--bg); border: 1px solid var(--rule); }
.agent__list { list-style: none; padding: 0; margin: 0; display: grid; gap: 16px; color: var(--muted); font-size: 16px; }
.agent__list strong { color: var(--ink); }

.m-floor { fill: var(--plan-floor); }
.m-wall { fill: none; stroke: var(--plan-wall); stroke-width: 2.5; stroke-linecap: square; }
.m-router rect, .m-laptop rect, .m-server rect { fill: var(--surface); stroke: var(--ink); stroke-width: 1.6; }
.m-laptop path { fill: var(--ink); stroke: var(--ink); stroke-width: 1; stroke-linejoin: round; }
.m-router path, .m-server path { fill: none; stroke: var(--ink); stroke-width: 1.6; stroke-linecap: round; }
.m-router rect { fill: var(--brand-soft); }
.m-wave { fill: none; stroke: var(--brand); stroke-width: 2; stroke-linecap: round; }
.m-air { fill: none; stroke: var(--brand); stroke-width: 1.6; stroke-dasharray: 2 4; stroke-linecap: round; }
.m-cable { fill: none; stroke: var(--ink); stroke-width: 2.5; stroke-linejoin: round; }
.m-label { font: 500 10px var(--sans); fill: var(--muted); }
.m-dot { stroke: var(--surface); stroke-width: 2; }
.m-dot--good { fill: var(--good); }
.m-dot--bad { fill: var(--bad); }
.m-packet { fill: var(--brand); }
.m-track { fill: var(--rule); }
.m-fill { fill: var(--brand); transform-box: fill-box; transform-origin: left center; }

/* Static end state (also the reduced-motion version): laptop in the far
   room, both dots shown, bars full, no packet. */
.m-laptop--walk { transform: translate(196px, 92px); }
.m-packet { opacity: 0; }

@media (prefers-reduced-motion: no-preference) {
  .m-wave { animation: m-wave 2.4s ease-out infinite; }
  .m-wave--2 { animation-delay: 0.3s; }
  .m-wave--3 { animation-delay: 0.6s; }
  .m-laptop--walk { animation: m-walk 6s ease-in-out infinite; }
  .m-dot { transform-box: fill-box; transform-origin: center; }
  .m-dot--good { animation: m-dot-good 6s ease-out infinite; }
  .m-dot--bad { animation: m-dot-bad 6s ease-out infinite; }
  .m-packet { animation: m-packet 6s ease-in-out infinite; }
  .m-fill--up { animation: m-fill-up 6s linear infinite; }
  .m-fill--down { animation: m-fill-down 6s linear infinite; }
}
@keyframes m-wave { 0% { opacity: 0.15; } 30% { opacity: 1; } 100% { opacity: 0.15; } }
@keyframes m-walk {
  0%, 8% { transform: translate(100px, 92px); }
  42%, 50% { transform: translate(100px, 92px); }
  70%, 92% { transform: translate(196px, 92px); }
  100% { transform: translate(100px, 92px); }
}
@keyframes m-dot-good { 0%, 14% { transform: scale(0); } 20%, 94% { transform: scale(1); } 100% { transform: scale(0); } }
@keyframes m-dot-bad { 0%, 72% { transform: scale(0); } 78%, 94% { transform: scale(1); } 100% { transform: scale(0); } }
@keyframes m-packet {
  0% { opacity: 0; transform: translate(48px, 58px); }
  4% { opacity: 1; transform: translate(48px, 58px); }
  18% { transform: translate(122px, 46px); }
  32% { transform: translate(188px, 46px); }
  42% { opacity: 1; transform: translate(188px, 58px); }
  46%, 50% { opacity: 0; transform: translate(188px, 58px); }
  54% { opacity: 1; transform: translate(188px, 58px); }
  64% { transform: translate(188px, 46px); }
  78% { transform: translate(122px, 46px); }
  92% { opacity: 1; transform: translate(48px, 58px); }
  96%, 100% { opacity: 0; transform: translate(48px, 58px); }
}
@keyframes m-fill-up { 0%, 4% { transform: scaleX(0); } 42%, 96% { transform: scaleX(1); } 100% { transform: scaleX(0); } }
@keyframes m-fill-down { 0%, 54% { transform: scaleX(0); } 92%, 96% { transform: scaleX(1); } 100% { transform: scaleX(0); } }

.modes + .compare-wrap { max-width: 880px; margin: 32px 0 0; }
.compare { border-collapse: collapse; width: 100%; font-size: 15px; }
@media (max-width: 560px) { .compare { font-size: 14px; } .compare tbody tr th { white-space: normal; } }
.compare th, .compare td { text-align: left; vertical-align: top; padding: 10px 14px 10px 0; border-bottom: 1px solid var(--rule); }
.compare thead th { font-weight: 600; border-bottom-color: var(--ink); }
.compare tbody th { font-weight: 600; white-space: nowrap; }
.compare td { color: var(--muted); }
.modes__more { font-size: 16px; color: var(--muted); margin: 16px 0 0; }

/* Downloads */
.downloads { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 20px; }
.platform { background: var(--surface); border: 1px solid var(--rule); border-radius: var(--radius); padding: 22px 22px 18px; }
.platform.is-yours { border-color: var(--brand); box-shadow: 0 0 0 1px var(--brand); }
.platform h3 { font-size: 20px; font-weight: 700; }
.platform .req { margin: 2px 0 14px; color: var(--muted); font-size: 14px; }
.platform ul { list-style: none; padding: 0; margin: 0; }
.platform li { padding: 8px 0; border-top: 1px solid var(--rule); font-size: 16px; }
.platform .or { font-size: 14px; color: var(--muted); margin: 16px 0 8px; }
.cmd { display: flex; align-items: center; gap: 8px; background: var(--bg); border: 1px solid var(--rule); border-radius: 8px; padding: 8px 8px 8px 12px; }
.cmd code { font-size: 12.5px; overflow-x: auto; white-space: nowrap; flex: 1; min-width: 0; }
.copy { font: 600 13px var(--sans); color: var(--ink); background: var(--surface); border: 1px solid var(--rule); border-radius: 6px; padding: 4px 10px; cursor: pointer; }
@media (max-width: 900px) { .downloads { grid-template-columns: minmax(0, 1fr); } }

.notes { max-width: 720px; margin-top: 36px; color: var(--muted); font-size: 16px; }
.notes strong { color: var(--ink); }
.code { background: var(--surface); border: 1px solid var(--rule); border-radius: 8px; padding: 14px 16px; overflow-x: auto; font-size: 14px; line-height: 1.55; color: var(--ink); }

/* Docs */
.doclist { list-style: none; padding: 0; margin: 0; max-width: 760px; }
.doclist li { display: grid; grid-template-columns: 220px 1fr; gap: 16px; padding: 14px 0; border-top: 1px solid var(--rule); }
.doclist li > a { font-weight: 600; }
.doclist span { color: var(--muted); font-size: 16px; }
@media (max-width: 600px) { .doclist li { grid-template-columns: 1fr; gap: 2px; } }

/* Contribute + support */
.support .cta { margin-bottom: 44px; }
.help { list-style: none; padding: 0; margin: 0; display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 36px; }
.help h3 { font-size: 18px; font-weight: 600; margin-bottom: 6px; }
.help p { margin: 0; color: var(--muted); font-size: 16px; }
@media (max-width: 900px) { .help { grid-template-columns: 1fr; gap: 24px; } }

/* Footer */
.site-footer { margin-top: 112px; border-top: 1px solid var(--rule); padding: 28px 0 40px; font-size: 14px; color: var(--muted); }
.site-footer__inner { display: flex; justify-content: space-between; gap: 24px; flex-wrap: wrap; }
.site-footer p { margin: 0; max-width: 560px; }
.site-footer p:last-child { display: flex; gap: 18px; flex-wrap: wrap; }

/* Docs pages (rendered from docs/guide by build.mjs) */
.docs { display: grid; grid-template-columns: 200px minmax(0, 1fr); gap: 56px; padding-top: 48px; }
.docs-nav { position: sticky; top: 84px; align-self: start; font-size: 15px; }
.docs-nav__title { font: 600 13px var(--sans); color: var(--muted); margin: 0 0 10px; }
.docs-nav ol { list-style: none; padding: 0; margin: 0; }
.docs-nav a { display: block; padding: 5px 10px; margin-left: -10px; border-radius: 6px; color: var(--ink); text-decoration: none; }
.docs-nav a:hover { background: var(--surface); }
.docs-nav a[aria-current="page"] { background: var(--brand-soft); color: var(--brand); font-weight: 600; }
@media (max-width: 860px) {
  .docs { grid-template-columns: 1fr; gap: 24px; padding-top: 28px; }
  .docs-nav { position: static; }
  .docs-nav ol { display: flex; flex-wrap: wrap; gap: 4px 6px; }
  .docs-nav a { margin-left: 0; border: 1px solid var(--rule); font-size: 14px; }
}

.doc { max-width: 720px; min-width: 0; }
.doc > h1 { font-size: clamp(2rem, 4vw, 2.6rem); font-weight: 700; letter-spacing: -0.02em; }
.doc__lede { color: var(--muted); font-size: 19px; margin: 10px 0 0; }
.toc { margin-top: 24px; padding: 14px 18px; border-left: 2px solid var(--rule); font-size: 15px; }
.toc p { margin: 0 0 4px; font-weight: 600; color: var(--muted); font-size: 13px; }
.toc ul { list-style: none; margin: 0; padding: 0; }
.toc li { padding: 2px 0; }
.toc a { color: var(--ink); text-decoration: none; }
.toc a:hover { color: var(--brand); }

.prose { margin-top: 8px; font-size: 17px; }
.prose h2 { font-size: 1.5rem; font-weight: 700; margin: 2.4em 0 0.6em; letter-spacing: -0.01em; scroll-margin-top: 80px; }
.prose h3 { font-size: 1.15rem; font-weight: 600; margin: 1.8em 0 0.4em; scroll-margin-top: 80px; }
.prose h2, .prose h3 { position: relative; }
.prose .anchor { position: absolute; left: -0.9em; color: var(--muted); text-decoration: none; opacity: 0; font-weight: 400; }
.prose h2:hover .anchor, .prose h3:hover .anchor, .prose .anchor:focus { opacity: 1; }
.prose p, .prose ul, .prose ol { margin: 0 0 1em; }
.prose li { margin: 0.25em 0; }
.prose li > p { margin: 0; }
.prose img { border: 1px solid var(--rule); border-radius: var(--radius); margin: 1.5em 0; box-shadow: var(--shadow); }
.prose pre { background: var(--surface); border: 1px solid var(--rule); border-radius: 8px; padding: 14px 16px; overflow-x: auto; font-size: 14px; line-height: 1.55; }
.prose pre code { background: none; padding: 0; font-size: inherit; }
.prose :not(pre) > code { overflow-wrap: anywhere; }
.prose blockquote { margin: 1.5em 0; padding: 12px 18px; border-left: 3px solid var(--brand); background: var(--brand-soft); border-radius: 0 8px 8px 0; }
.prose blockquote p:last-child { margin-bottom: 0; }
.table-wrap { overflow-x: auto; margin: 0 0 1.4em; }
.prose table { border-collapse: collapse; font-size: 15px; width: 100%; }
.prose th, .prose td { text-align: left; padding: 8px 12px 8px 0; border-bottom: 1px solid var(--rule); vertical-align: top; }
.prose th { font-weight: 600; border-bottom-color: var(--ink); }
.prose hr { border: 0; border-top: 1px solid var(--rule); margin: 2em 0; }

.pager { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; margin-top: 56px; }
.pager a { display: block; padding: 14px 16px; border: 1px solid var(--rule); border-radius: var(--radius); text-decoration: none; color: var(--ink); font-weight: 600; }
.pager a:hover { border-color: var(--brand); }
.pager span { display: block; font: 400 13px var(--sans); color: var(--muted); }
.pager__next { text-align: right; grid-column: 2; }

.notfound { padding-top: 96px; min-height: 50vh; }
.notfound h1 { font-size: clamp(2.2rem, 5vw, 3.2rem); font-weight: 700; }
.notfound p { color: var(--muted); font-size: 18px; max-width: 34em; }