:root {
  color-scheme: dark;
  --canvas: #09090b;
  --panel: #18181b;
  --track: #27272a;
  --line: #27272a;
  --edge: #3f3f46;
  --fg: #f5f5f4;
  --body: #e7e5e4;
  --muted: #a1a1aa;
  --dim: #71717a;
  --accent: #f59e0b;
  --accent-hover: #fbbf24;
  --mark: #fde68a;
  --accent-soft: #2a1911;
  --ok: #34d399;
  --info: #38bdf8;
}

* {
  box-sizing: border-box;
}

html {
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
}

body {
  margin: 0;
  min-height: 100dvh;
  background: var(--canvas);
  color: var(--body);
  font-family: "IBM Plex Sans", ui-sans-serif, system-ui, sans-serif;
  line-height: 1.55;
}

a {
  color: var(--accent);
  text-decoration-thickness: 1px;
  text-underline-offset: 0.18em;
}

a:hover {
  color: var(--accent-hover);
}

img {
  max-width: 100%;
  height: auto;
}

code,
pre {
  font-family: "IBM Plex Mono", ui-monospace, SFMono-Regular, Menlo, monospace;
}

code {
  font-size: 0.9em;
  color: var(--mark);
}

.skip {
  position: absolute;
  left: -999px;
  top: 0;
}

.skip:focus {
  left: 1rem;
  top: 1rem;
  z-index: 20;
  background: var(--panel);
  color: var(--fg);
  padding: 0.4rem 0.7rem;
}

.top {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.75rem 1.25rem;
  padding: 0.75rem 1.25rem;
  border-bottom: 1px solid var(--line);
  background: color-mix(in srgb, var(--canvas) 88%, transparent);
  backdrop-filter: blur(10px);
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.55rem;
  color: var(--fg);
  text-decoration: none;
  font-weight: 600;
  letter-spacing: 0.02em;
}

.brand img {
  width: 28px;
  height: 28px;
}

.nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem 0.9rem;
  margin-left: auto;
  font-size: 0.92rem;
}

.nav a {
  color: var(--muted);
  text-decoration: none;
}

.nav a:hover,
.nav a[aria-current="page"] {
  color: var(--fg);
}

.wrap {
  width: min(72rem, calc(100% - 2rem));
  margin: 0 auto;
  padding: 2rem 0 4rem;
}

.home .wrap {
  width: min(76rem, calc(100% - 2rem));
}

.hero {
  display: grid;
  gap: 1.5rem;
  margin-bottom: 2.5rem;
}

.hero img.banner {
  width: 100%;
  border: 1px solid var(--edge);
  border-radius: 12px;
  background: #0c0d10;
}

.lede {
  max-width: 42rem;
}

.lede h1 {
  margin: 0 0 0.6rem;
  color: var(--fg);
  font-size: clamp(1.8rem, 4vw, 2.6rem);
  line-height: 1.15;
  letter-spacing: -0.03em;
}

.lede p {
  margin: 0 0 1rem;
  color: var(--muted);
  font-size: 1.08rem;
}

.defs {
  display: grid;
  gap: 0.85rem;
  margin: 1.25rem 0 0;
}

@media (min-width: 720px) {
  .defs {
    grid-template-columns: 1fr 1fr;
  }
}

.defs dt {
  color: var(--accent);
  font-family: "IBM Plex Mono", ui-monospace, Menlo, monospace;
  font-size: 0.82rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: lowercase;
}

.defs dd {
  margin: 0.2rem 0 0;
  color: var(--body);
}

.cta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  margin-top: 1.25rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.55rem 0.9rem;
  border-radius: 8px;
  border: 1px solid var(--edge);
  background: var(--panel);
  color: var(--fg);
  text-decoration: none;
  font-weight: 600;
}

.btn:hover {
  color: var(--fg);
  border-color: var(--accent);
}

.btn.primary {
  background: var(--accent);
  border-color: var(--accent);
  color: #1c1408;
}

.btn.primary:hover {
  background: var(--accent-hover);
  color: #1c1408;
}

section {
  margin: 2.75rem 0;
}

section h2 {
  margin: 0 0 0.75rem;
  color: var(--fg);
  font-size: 1.45rem;
  letter-spacing: -0.02em;
}

.kicker {
  margin: 0 0 0.35rem;
  color: var(--accent);
  font-family: "IBM Plex Mono", ui-monospace, Menlo, monospace;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.split {
  display: grid;
  gap: 1rem;
}

@media (min-width: 800px) {
  .split {
    grid-template-columns: 1fr 1fr;
  }
}

.card {
  padding: 1.15rem 1.2rem 1.25rem;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--panel);
}

.card h3 {
  margin: 0 0 0.7rem;
  color: var(--fg);
  font-size: 1.15rem;
}

.card.is {
  border-color: color-mix(in srgb, var(--ok) 35%, var(--line));
}

.card.is-not {
  border-color: color-mix(in srgb, var(--accent) 28%, var(--line));
}

.card ul {
  margin: 0;
  padding-left: 1.1rem;
}

.card li + li {
  margin-top: 0.45rem;
}

.phones {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  justify-content: center;
  margin: 1rem 0 0;
}

.phones img {
  width: 220px;
  border-radius: 18px;
  border: 1px solid var(--edge);
}

.wide {
  width: 100%;
  border-radius: 12px;
  border: 1px solid var(--edge);
}

pre.diagram,
.prose pre {
  overflow-x: auto;
  padding: 1rem 1.1rem;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: #0c0d10;
  color: var(--mark);
  font-size: 0.82rem;
  line-height: 1.45;
}

.docs {
  display: grid;
  gap: 0.75rem;
}

@media (min-width: 640px) {
  .docs {
    grid-template-columns: 1fr 1fr;
  }
}

.docs a {
  display: block;
  padding: 0.9rem 1rem;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--panel);
  color: var(--fg);
  text-decoration: none;
}

.docs a:hover {
  border-color: var(--accent);
}

.docs a strong {
  display: block;
  color: var(--accent);
  font-size: 0.95rem;
}

.docs a span {
  display: block;
  margin-top: 0.25rem;
  color: var(--muted);
  font-size: 0.9rem;
}

.foot {
  border-top: 1px solid var(--line);
  padding: 1.25rem;
  color: var(--dim);
  font-size: 0.88rem;
}

.foot .wrap {
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1.25rem;
  justify-content: space-between;
}

.prose {
  max-width: 48rem;
  margin: 0 auto;
}

.prose h1,
.prose h2,
.prose h3 {
  color: var(--fg);
  letter-spacing: -0.02em;
}

.prose h1 {
  margin-top: 0;
}

.prose h2 {
  margin-top: 2rem;
}

.prose p {
  margin: 0.85rem 0;
}

.prose li + li {
  margin-top: 0.3rem;
}

.prose table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.92rem;
}

.prose th,
.prose td {
  border: 1px solid var(--edge);
  padding: 0.45rem 0.6rem;
  text-align: left;
  vertical-align: top;
}

.prose th {
  background: var(--panel);
  color: var(--fg);
}

.prose blockquote {
  margin: 1rem 0;
  padding: 0.2rem 0 0.2rem 1rem;
  border-left: 3px solid var(--accent);
  color: var(--muted);
}

.prose hr {
  border: 0;
  border-top: 1px solid var(--line);
  margin: 2rem 0;
}

.prose img {
  border-radius: 10px;
  border: 1px solid var(--edge);
}

.lost {
  text-align: center;
  padding: 4rem 1rem;
}

.lost h1 {
  color: var(--fg);
}