:root {
  color-scheme: dark;
  --ink: #edf5ff;
  --muted: #a9bdd2;
  --canvas: #07101d;
  --surface: #0b1829;
  --surface-raised: #10233a;
  --line: #29445f;
  --blue: #69b9ff;
  --blue-deep: #1473bd;
  --amber: #ffc96b;
  --green: #66ddb4;
  --danger: #ffaaa3;
  --shadow: 0 20px 70px rgb(0 0 0 / .28);
  --display: "Arial Narrow", "Roboto Condensed", "Liberation Sans Narrow", sans-serif;
  --body: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --mono: "Cascadia Code", "SFMono-Regular", Consolas, "Liberation Mono", monospace;
}

:root[data-theme="light"] {
  color-scheme: light;
  --ink: #102033;
  --muted: #4d6277;
  --canvas: #f4f8fc;
  --surface: #ffffff;
  --surface-raised: #e9f2fa;
  --line: #adc2d4;
  --blue: #075fa9;
  --blue-deep: #0a6dbd;
  --amber: #8a5700;
  --green: #087858;
  --danger: #a92d25;
  --shadow: 0 18px 55px rgb(27 60 91 / .14);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 6rem; }
body { margin: 0; background: var(--canvas); color: var(--ink); font-family: var(--body); font-size: 1rem; line-height: 1.65; }
a { color: var(--blue); text-underline-offset: .2em; text-decoration-thickness: .08em; }
a:hover { text-decoration-thickness: .15em; }
button, a { -webkit-tap-highlight-color: transparent; }
:focus-visible { outline: 3px solid var(--amber); outline-offset: 4px; border-radius: .2rem; }
.skip-link { position: fixed; z-index: 20; top: .75rem; left: .75rem; padding: .75rem 1rem; background: var(--amber); color: #101820; font-weight: 800; transform: translateY(-160%); }
.skip-link:focus { transform: none; }

.site-header { position: sticky; z-index: 10; top: 0; min-height: 4.5rem; display: grid; grid-template-columns: auto 1fr auto; align-items: center; gap: 2rem; padding: .65rem clamp(1rem, 4vw, 4rem); border-bottom: 1px solid color-mix(in srgb, var(--line) 70%, transparent); background: color-mix(in srgb, var(--canvas) 88%, transparent); backdrop-filter: blur(16px); }
.brand { display: inline-flex; min-width: 9rem; }
.brand img { display: block; width: 10rem; height: auto; }
.site-header nav { display: flex; justify-content: center; gap: clamp(.85rem, 2.3vw, 2rem); }
.site-header nav a { color: var(--muted); font-size: .84rem; font-weight: 750; letter-spacing: .06em; text-decoration: none; text-transform: uppercase; }
.site-header nav a, .release-strip a, .section-link a, footer a { min-height: 1.5rem; display: inline-flex; align-items: center; }
.site-header nav a:hover { color: var(--ink); }
.theme-toggle { display: none; min-width: 5.6rem; min-height: 2.75rem; align-items: center; justify-content: center; gap: .45rem; border: 1px solid var(--line); border-radius: 999px; background: var(--surface); color: var(--ink); font: 700 .82rem var(--body); cursor: pointer; }.theme-toggle select { border: 0; background: transparent; color: inherit; font: inherit; cursor: pointer; }
.has-js .theme-toggle { display: inline-flex; }

.hero { min-height: min(54rem, calc(100svh - 4.5rem)); display: grid; grid-template-columns: minmax(0, 1.08fr) minmax(19rem, .72fr); align-items: center; gap: clamp(3rem, 7vw, 8rem); max-width: 96rem; margin: auto; padding: clamp(4.5rem, 10vw, 9rem) clamp(1.25rem, 6vw, 6rem); }
.eyebrow { margin: 0 0 .8rem; color: var(--amber); font: 800 .78rem/1.2 var(--mono); letter-spacing: .12em; text-transform: uppercase; }
h1, h2 { margin: 0; font-family: var(--display); font-stretch: condensed; letter-spacing: -.035em; line-height: .94; }
h1 { max-width: 13ch; font-size: clamp(3.5rem, 7.8vw, 8rem); text-transform: uppercase; }
h1 span { color: var(--blue); }
h2 { max-width: 18ch; font-size: clamp(2.5rem, 5.6vw, 5.2rem); text-transform: uppercase; }
h3 { margin: 0 0 .45rem; font-size: 1.15rem; line-height: 1.25; }
.lede { max-width: 43rem; margin: 1.7rem 0 0; color: var(--muted); font-size: clamp(1.05rem, 1.5vw, 1.3rem); }
.actions { display: flex; flex-wrap: wrap; gap: .8rem; margin: 2rem 0; }
.button { min-height: 3rem; display: inline-flex; align-items: center; justify-content: center; padding: .7rem 1.15rem; border: 1px solid var(--blue-deep); border-radius: .45rem; font-weight: 800; text-decoration: none; }
.button.primary { background: var(--blue-deep); color: #fff; box-shadow: 0 10px 30px color-mix(in srgb, var(--blue-deep) 28%, transparent); }
.button.primary:hover { background: color-mix(in srgb, var(--blue-deep) 82%, white); }
.button.secondary { background: transparent; color: var(--ink); border-color: var(--line); }
.release-strip { display: flex; flex-wrap: wrap; align-items: center; gap: .65rem 1rem; color: var(--muted); font-size: .83rem; }
.release-strip img { height: 20px; width: auto; }
.status-dot { width: .55rem; height: .55rem; border-radius: 50%; background: var(--green); box-shadow: 0 0 0 .3rem color-mix(in srgb, var(--green) 15%, transparent); }

.trace-card { position: relative; padding: 1.25rem; border: 1px solid var(--line); border-radius: .8rem; background: linear-gradient(150deg, color-mix(in srgb, var(--surface-raised) 85%, transparent), var(--surface)); box-shadow: var(--shadow); overflow: hidden; }
.trace-card::before { content: ""; position: absolute; inset: 0; pointer-events: none; background: linear-gradient(110deg, transparent 30%, color-mix(in srgb, var(--blue) 9%, transparent), transparent 70%); transform: translateX(-100%); animation: scan 7s ease-in-out infinite; }
.trace-heading { display: flex; justify-content: space-between; gap: 1rem; padding-bottom: .8rem; border-bottom: 1px solid var(--line); color: var(--muted); font: 700 .7rem var(--mono); letter-spacing: .08em; text-transform: uppercase; }
.trace-list { position: relative; list-style: none; margin: 1.2rem 0; padding: 0; }
.trace-list::before { content: ""; position: absolute; left: .55rem; top: 1rem; bottom: 1rem; width: 2px; background: var(--line); }
.trace-list::after { content: ""; position: absolute; left: .55rem; top: 1rem; width: 2px; height: 25%; background: var(--blue); box-shadow: 0 0 12px var(--blue); animation: trace 4s ease-in-out infinite; }
.trace-list li { position: relative; display: grid; grid-template-columns: 1.2rem 1fr; gap: 0 .8rem; align-items: center; min-height: 4.15rem; }
.trace-list li::before { content: ""; z-index: 1; width: .72rem; height: .72rem; border: 2px solid var(--blue); border-radius: 50%; background: var(--surface); }
.trace-node, .trace-list small { grid-column: 2; }
.trace-node { font-weight: 850; }
.trace-list small { color: var(--muted); }
.trace-card > p { margin: 0; padding-top: .8rem; border-top: 1px solid var(--line); color: var(--green); font: 700 .77rem var(--mono); }

.proof-band { display: grid; grid-template-columns: repeat(4, 1fr); border-block: 1px solid var(--line); background: var(--surface); }
.proof-band p { margin: 0; padding: 1.35rem clamp(1rem, 3vw, 2.5rem); border-right: 1px solid var(--line); }
.proof-band p:last-child { border: 0; }
.proof-band strong, .proof-band span { display: block; }
.proof-band strong { color: var(--ink); font-size: .94rem; }
.proof-band span { color: var(--muted); font-size: .8rem; }

.section { max-width: 86rem; margin: auto; padding: clamp(5rem, 9vw, 9rem) clamp(1.25rem, 5vw, 5rem); }
.section-intro { display: grid; grid-template-columns: minmax(11rem, .5fr) minmax(18rem, 1fr); gap: 1rem 4rem; align-items: end; margin-bottom: clamp(2.5rem, 5vw, 5rem); }
.section-intro .eyebrow { grid-column: 1; }
.section-intro h2 { grid-column: 1 / -1; }
.section-intro > p:last-child { grid-column: 2; margin: 0; color: var(--muted); font-size: 1.05rem; }

.steps { list-style: none; margin: 0; padding: 0; border-top: 1px solid var(--line); }
.steps > li { display: grid; grid-template-columns: 5rem minmax(0, 1fr); gap: 1rem; padding: 2rem 0; border-bottom: 1px solid var(--line); }
.steps > li > div:last-child { display: grid; grid-template-columns: minmax(10rem, .7fr) minmax(16rem, 1fr); gap: .5rem 2rem; align-items: start; }
.steps h3 { font: 800 1.55rem var(--display); text-transform: uppercase; }
.steps p { margin: 0; color: var(--muted); }
.steps pre { grid-column: 2; grid-row: 1 / span 2; }
.step-number { color: var(--blue); font: 700 2.5rem var(--mono); }
pre { max-width: 100%; margin: 0; padding: 1rem; border: 1px solid var(--line); border-radius: .45rem; background: #06101d; color: #d9efff; overflow-x: auto; font: .86rem/1.65 var(--mono); }
:root[data-theme="light"] pre { background: #102033; color: #edf5ff; }
code { font-family: var(--mono); }
.warning { grid-column: 2; color: var(--amber) !important; font-size: .88rem; }
.next-check { display: grid; grid-template-columns: 1fr minmax(16rem, .65fr); gap: 2rem; align-items: center; margin-top: 2rem; padding: 1.5rem; border-left: .3rem solid var(--green); background: var(--surface); }
.next-check p { margin: 0; color: var(--muted); }
.platform-notes { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; margin-top: 1rem; color: var(--muted); font-size: .9rem; }
.platform-notes p { margin: 0; padding: 1rem; border: 1px solid var(--line); }

.configure { max-width: none; background: var(--surface); }
.configure > * { max-width: 76rem; margin-inline: auto; }
.layer-stack { display: grid; grid-template-columns: repeat(5, 1fr); gap: .6rem; align-items: end; margin-bottom: 4rem; }
.layer-stack div { min-height: 8rem; display: flex; flex-direction: column; justify-content: flex-end; padding: 1rem; border: 1px solid var(--line); border-top: .3rem solid var(--blue); background: var(--canvas); }
.layer-stack div:nth-child(2) { min-height: 9rem; }
.layer-stack div:nth-child(3) { min-height: 10rem; border-top-color: var(--green); }
.layer-stack div:nth-child(4) { min-height: 11rem; border-top-color: var(--amber); }
.layer-stack div:nth-child(5) { min-height: 12rem; border-top-color: var(--danger); }
.layer-stack span { color: var(--muted); font: 700 .68rem var(--mono); text-transform: uppercase; }
.layer-stack strong { margin: .3rem 0; font: 750 .86rem var(--mono); overflow-wrap: anywhere; }
.layer-stack small { color: var(--muted); line-height: 1.35; }
.choice-grid, .docs-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1rem; }
.choice { display: flex; flex-direction: column; min-width: 0; padding: 1.5rem; border: 1px solid var(--line); background: var(--canvas); }
.choice p { color: var(--muted); }
.choice pre { margin: auto 0 1rem; }
.choice > a { font-weight: 750; }
.choice-tag { margin: 0 0 1.5rem !important; color: var(--amber) !important; font: 700 .72rem var(--mono); letter-spacing: .08em; text-transform: uppercase; }

.tool-table-wrap { overflow-x: auto; border: 1px solid var(--line); border-radius: .4rem; }
table { width: 100%; border-collapse: collapse; }
th, td { padding: 1rem 1.2rem; border-bottom: 1px solid var(--line); text-align: left; }
th { background: var(--surface); color: var(--muted); font: 750 .72rem var(--mono); letter-spacing: .07em; text-transform: uppercase; }
tbody tr:last-child td { border-bottom: 0; }
td:first-child { color: var(--blue); }
.section-link { text-align: right; }

.fix { max-width: none; background: var(--surface); }
.fix > * { max-width: 76rem; margin-inline: auto; }
.troubleshoot { border-top: 1px solid var(--line); }
details { border-bottom: 1px solid var(--line); }
summary { min-height: 4.5rem; display: flex; align-items: center; justify-content: space-between; gap: 1rem; padding: 1rem 0; font-size: 1.1rem; font-weight: 780; cursor: pointer; list-style: none; }
summary::-webkit-details-marker { display: none; }
summary::after { content: "+"; color: var(--blue); font: 400 1.7rem var(--mono); }
details[open] summary::after { content: "−"; }
details > div { max-width: 50rem; padding: 0 0 1.6rem; color: var(--muted); }
details pre { margin-top: 1rem; }

.architecture-callout { display: grid; grid-template-columns: 1fr auto; gap: 2rem; align-items: end; max-width: 76rem; margin-block: clamp(4rem, 8vw, 8rem); padding-block: clamp(2.5rem, 5vw, 4rem); border-block: 1px solid var(--line); }
.architecture-callout p:not(.eyebrow) { max-width: 43rem; color: var(--muted); }
.docs-grid { grid-template-columns: repeat(4, 1fr); }
.doc-card { min-height: 11rem; display: flex; flex-direction: column; padding: 1.2rem; border: 1px solid var(--line); color: var(--ink); text-decoration: none; }
.doc-card:hover { border-color: var(--blue); background: var(--surface); }
.doc-card span { color: var(--amber); font: 700 .7rem var(--mono); text-transform: uppercase; }
.doc-card strong { margin: auto 0 .25rem; font-size: 1.05rem; }
.doc-card small { color: var(--muted); }

footer { display: flex; justify-content: space-between; gap: 2rem; padding: 2rem clamp(1.25rem, 5vw, 5rem); border-top: 1px solid var(--line); color: var(--muted); font-size: .85rem; }
@keyframes trace { 0% { transform: translateY(0); height: 8%; } 50% { transform: translateY(13rem); height: 30%; } 100% { transform: translateY(0); height: 8%; } }
@keyframes scan { 0%, 25% { transform: translateX(-100%); } 65%, 100% { transform: translateX(100%); } }

@media (min-width: 100rem) {
  .hero { max-width: 112rem; grid-template-columns: minmax(0, 1.15fr) minmax(24rem, .65fr); padding-inline: 8rem; }
  .section { max-width: 104rem; }
  .configure > *, .fix > *, .architecture-callout { max-width: 92rem; }
  .section-intro { grid-template-columns: minmax(14rem, .45fr) minmax(28rem, 1fr); gap-inline: 6rem; }
  .steps > li > div:last-child { grid-template-columns: minmax(14rem, .65fr) minmax(24rem, 1fr); gap-inline: 4rem; }
  .docs-grid { grid-template-columns: repeat(5, minmax(0, 1fr)); }
}

@media (max-width: 860px) {
  .site-header { grid-template-columns: 1fr auto; gap: .75rem; }
  .site-header nav { grid-row: 2; grid-column: 1 / -1; justify-content: flex-start; overflow-x: auto; padding-bottom: .2rem; }
  .hero { grid-template-columns: 1fr; min-height: auto; }
  .trace-card { max-width: 32rem; }
  .proof-band { grid-template-columns: 1fr 1fr; }
  .proof-band p:nth-child(2) { border-right: 0; }
  .proof-band p:nth-child(-n+2) { border-bottom: 1px solid var(--line); }
  .section-intro, .steps > li > div:last-child { grid-template-columns: 1fr; }
  .section-intro > p:last-child, .steps pre, .warning { grid-column: 1; grid-row: auto; }
  .layer-stack { grid-template-columns: 1fr 1fr; align-items: stretch; }
  .layer-stack div { min-height: 8rem !important; }
  .choice-grid { grid-template-columns: 1fr; }
  .docs-grid { grid-template-columns: 1fr 1fr; }
  .architecture-callout { grid-template-columns: 1fr; align-items: start; }
}

@media (max-width: 520px) {
  .site-header { padding-inline: .8rem; }
  .brand img { width: 8.5rem; }
  .theme-label { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); }
  .theme-toggle { min-width: 2.75rem; }
  .hero { padding-top: 3.5rem; }
  h1 { font-size: clamp(3rem, 16vw, 4.6rem); }
  .proof-band, .layer-stack, .docs-grid { grid-template-columns: 1fr; }
  .proof-band p { border-right: 0; border-bottom: 1px solid var(--line); }
  .steps > li { grid-template-columns: 2.5rem minmax(0, 1fr); }
  .step-number { font-size: 1.5rem; }
  .next-check { grid-template-columns: 1fr; }
  .platform-notes { grid-template-columns: 1fr; }
  footer { flex-direction: column; }
}

@media (orientation: landscape) and (max-height: 560px) {
  .hero { min-height: auto; padding-block: 1.25rem; gap: 1.5rem; }
  h1 { font-size: clamp(2.5rem, 6vw, 3.25rem); }
  .hero-copy > p:not(.eyebrow) { margin-block: .65rem; line-height: 1.45; }
  .trace-card { align-self: start; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; }
  .reveal { opacity: 1; transform: none; }
}

/* Launch-trace signature: controls share one readable rhythm. */
::selection{background:var(--blue);color:var(--canvas)}h1,h2{text-wrap:balance}p{text-wrap:pretty}.trace-card{border-top:.3rem solid var(--blue)}.trace-heading{color:color-mix(in srgb,var(--blue) 72%,var(--ink))}