:root {
  color-scheme: light dark;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --bg: light-dark(#f2f2f7, #1c1c1e);
  --card: light-dark(#ffffff, #2c2c2e);
  --text: light-dark(#1c1c1e, #f2f2f7);
  --muted: light-dark(rgba(28, 28, 30, 0.68), rgba(242, 242, 247, 0.68));
  --faint: light-dark(rgba(28, 28, 30, 0.45), rgba(242, 242, 247, 0.45));
  --badge: light-dark(#e3e3e8, #3a3a3c);
  --line: light-dark(rgba(0, 0, 0, 0.08), rgba(255, 255, 255, 0.08));
  --blue: #0a84ff;
  --stalled: #8000ff;
  --shadow: light-dark(rgba(0, 0, 0, 0.12), rgba(0, 0, 0, 0.45));
}

* {
  box-sizing: border-box;
}

html {
  background: var(--bg);
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-size: 17px;
  line-height: 1.45;
}

img {
  display: block;
  max-width: 100%;
}

a {
  color: var(--blue);
}

a:visited {
  color: var(--blue);
}

:focus-visible {
  outline: 2px solid var(--blue);
  outline-offset: 3px;
}

.leds {
  display: flex;
  height: 6px;
}

.leds span {
  flex: 1;
}

.wrap {
  width: min(1080px, calc(100% - 40px));
  margin: 0 auto;
}

header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 22px 0 8px;
}

.brand,
.brand:visited {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--text);
  text-decoration: none;
  font-weight: 600;
  font-size: 17px;
  letter-spacing: -0.01em;
}

.brand img {
  width: 36px;
  height: 36px;
}

header nav a,
header nav a:visited {
  color: var(--muted);
  text-decoration: none;
  font-size: 15px;
}

header nav a:hover {
  color: var(--text);
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 48px;
  align-items: center;
  padding: 28px 0 64px;
}

.hero-icon {
  width: 96px;
  height: 96px;
  margin-bottom: 18px;
}

.eyebrow {
  margin: 0 0 8px;
  color: var(--muted);
  font-size: 13px;
  font-weight: 600;
}

h1 {
  margin: 0;
  font-size: clamp(36px, 5vw, 52px);
  line-height: 1.05;
  letter-spacing: -0.03em;
  font-weight: 700;
  max-width: 14ch;
}

.lede {
  margin: 16px 0 0;
  max-width: 38rem;
  color: var(--muted);
  font-size: 18px;
}

.download {
  margin-top: 28px;
}

.download-button {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 12px 18px;
  border-radius: 10px;
  background: var(--blue);
  color: #fff;
  text-decoration: none;
  font-weight: 600;
  font-size: 16px;
}

.download-button:visited {
  color: #fff;
}

.download-button:hover {
  background: #0077ed;
}

.download-button svg {
  width: 16px;
  height: 16px;
}

.download-meta,
.download-file,
.download-links,
.note {
  margin: 10px 0 0;
  color: var(--muted);
  font-size: 14px;
}

.download-file {
  font-variant-numeric: tabular-nums;
  overflow-wrap: anywhere;
}

.download-file:empty,
.digest:empty {
  display: none;
  margin: 0;
}

.download-links {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 16px;
}

.download-links a[hidden] {
  display: none !important;
}

.digest {
  display: block;
  margin-top: 8px;
  max-width: 100%;
  color: var(--faint);
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 12px;
  overflow-wrap: anywhere;
}

.note {
  max-width: 38rem;
}

.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;
}

.pad {
  display: flex;
  flex-direction: column;
  gap: 8px;
  width: 248px;
  padding: 16px;
  border-radius: 18px;
  background: #1c1c1e;
  box-shadow: 0 16px 40px var(--shadow);
}

.key {
  display: grid;
  grid-template-columns: 52px 1fr;
  gap: 12px;
  align-items: center;
}

.cap {
  position: relative;
  width: 52px;
  height: 52px;
  border-radius: 9px;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.16), rgba(255, 255, 255, 0) 46%),
    #2c2c2e;
  box-shadow:
    inset 0 0 0 1px rgba(255, 255, 255, 0.08),
    inset 0 -7px 10px rgba(0, 0, 0, 0.4),
    0 8px 16px color-mix(in srgb, var(--led) 50%, transparent);
  display: grid;
  place-items: center;
}

.cap img {
  width: 36px;
  height: 36px;
}

.cap .led {
  position: absolute;
  left: 12px;
  right: 12px;
  bottom: 5px;
  height: 3px;
  border-radius: 2px;
  background: var(--led);
  box-shadow: 0 0 8px var(--led);
}

.key p {
  margin: 0;
  color: #f2f2f7;
  font-size: 14px;
  font-weight: 600;
}

.key p span {
  display: block;
  margin-top: 2px;
  color: rgba(242, 242, 247, 0.5);
  font-size: 12px;
  font-weight: 500;
}

section {
  padding: 8px 0 64px;
}

h2 {
  margin: 0 0 8px;
  font-size: 28px;
  letter-spacing: -0.02em;
  font-weight: 700;
}

.section-lede {
  margin: 0 0 22px;
  max-width: 38rem;
  color: var(--muted);
}

.states {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 10px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.state {
  display: flex;
  align-items: center;
  gap: 10px;
  min-width: 0;
  padding: 10px;
  border-radius: 12px;
  background: var(--card);
  box-shadow: 0 0 0 1px var(--line);
}

.face {
  display: grid;
  place-items: center;
  width: 48px;
  height: 48px;
  flex: none;
  border-radius: 10px;
  background: #1c1c1e;
}

.face img {
  width: 40px;
  height: 40px;
}

.state-name {
  display: flex;
  align-items: center;
  gap: 6px;
  min-width: 0;
  font-size: 14px;
  font-weight: 600;
}

.dot {
  width: 9px;
  height: 9px;
  flex: none;
  border-radius: 50%;
  background: var(--led);
}

.dot.blinking,
.led.blinking {
  animation: blink 1s step-end infinite;
}

@keyframes blink {
  50% {
    opacity: 0.15;
  }
}

.facts {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
}

.facts article {
  padding: 16px;
  border-radius: 12px;
  background: var(--card);
  box-shadow: 0 0 0 1px var(--line);
}

.facts h3 {
  margin: 0 0 6px;
  font-size: 16px;
}

.facts p {
  margin: 0;
  color: var(--muted);
  font-size: 15px;
}

.steps {
  margin: 0;
  padding: 0;
  list-style: none;
  counter-reset: step;
}

.steps li {
  display: grid;
  grid-template-columns: 28px 1fr;
  gap: 12px;
  align-items: start;
  padding: 14px 0;
  border-top: 1px solid var(--line);
  color: var(--muted);
}

.steps li:last-child {
  border-bottom: 1px solid var(--line);
}

.steps li::before {
  counter-increment: step;
  content: counter(step);
  width: 28px;
  height: 28px;
  border-radius: 8px;
  background: var(--badge);
  color: var(--text);
  font-size: 13px;
  font-weight: 600;
  font-variant-numeric: tabular-nums;
  display: grid;
  place-items: center;
}

.agents {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 18px 0 0;
  padding: 0;
  list-style: none;
}

.agents li {
  padding: 6px 10px;
  border-radius: 8px;
  background: var(--badge);
  font-size: 14px;
  font-weight: 600;
}

.hardware {
  margin: 16px 0 0;
  max-width: 38rem;
  color: var(--muted);
  font-size: 15px;
}

footer {
  padding: 8px 0 40px;
  color: var(--faint);
  font-size: 13px;
}

footer p {
  margin: 0 0 6px;
}

@media (max-width: 860px) {
  .hero {
    grid-template-columns: 1fr;
    gap: 28px;
  }

  .pad {
    width: min(100%, 248px);
  }

  .states,
  .facts {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 560px) {
  .wrap {
    width: min(100% - 32px, 1080px);
  }

  .states,
  .facts {
    grid-template-columns: 1fr;
  }
}

@media (prefers-reduced-motion: reduce) {
  .dot.blinking,
  .led.blinking {
    animation: none;
  }
}