:root {
  color-scheme: light dark;
  --paper: #f4efe6;
  --ink: #16130f;
  --muted: #5e574c;
  --faint: #8a8276;
  --line: rgba(22, 19, 15, 0.12);
  --card: rgba(255, 252, 246, 0.78);
  --card-solid: #fffdf8;
  --accent: #c45c26;
  --accent-deep: #9a3f12;
  --teal: #1c4f4a;
  --glow: rgba(196, 92, 38, 0.18);
  --shadow: 0 1px 2px rgba(22, 19, 15, 0.04), 0 18px 48px rgba(22, 19, 15, 0.07);
  --sans: ui-sans-serif, system-ui, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --wrap: 44rem;
  --wide: 64rem;
  --radius: 1.15rem;
}

@media (prefers-color-scheme: dark) {
  :root {
    --paper: #12100e;
    --ink: #f3eee6;
    --muted: #b7aea1;
    --faint: #8d857a;
    --line: rgba(243, 238, 230, 0.12);
    --card: rgba(28, 24, 20, 0.78);
    --card-solid: #1c1814;
    --accent: #e0894e;
    --accent-deep: #f0b27a;
    --teal: #8fcdc4;
    --glow: rgba(224, 137, 78, 0.16);
    --shadow: 0 1px 2px rgba(0, 0, 0, 0.3), 0 22px 50px rgba(0, 0, 0, 0.28);
  }
}

* { box-sizing: border-box; }

html {
  background: var(--paper);
  color: var(--ink);
  font: 112.5%/1.7 var(--sans);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

body {
  margin: 0;
  min-height: 100vh;
  background:
    radial-gradient(1200px 520px at 88% -10%, var(--glow), transparent 55%),
    radial-gradient(800px 380px at -10% 20%, rgba(28, 79, 74, 0.12), transparent 50%),
    var(--paper);
}

a {
  color: var(--accent-deep);
  text-underline-offset: 0.18em;
}

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

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

.skip {
  position: absolute;
  left: 1rem;
  top: -4rem;
  background: var(--card-solid);
  padding: 0.5rem 0.8rem;
  border-radius: 0.4rem;
  z-index: 20;
}

.skip:focus { top: 1rem; }

.wrap {
  width: min(var(--wrap), calc(100% - 2.5rem));
  margin-inline: auto;
}

.wrap-wide {
  width: min(var(--wide), calc(100% - 2.5rem));
  margin-inline: auto;
}

.top {
  position: sticky;
  top: 0;
  z-index: 10;
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  background: color-mix(in srgb, var(--paper) 78%, transparent);
  border-bottom: 1px solid var(--line);
}

.top-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.85rem 1.5rem;
  padding: 0.9rem 0;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  color: var(--ink);
  text-decoration: none;
  font-weight: 700;
  letter-spacing: -0.03em;
  font-size: 1.05rem;
}

.mark {
  width: 2.15rem;
  height: 2.15rem;
  flex: none;
  border-radius: 0.48rem;
  object-fit: cover;
  background: #000;
}

.qr-card {
  margin: 1.6rem 0 0;
}

.qr-card > a {
  display: block;
  width: 7.25rem;
  line-height: 0;
}

.qr-card img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: 0.7rem;
  background: #000;
  box-shadow: var(--shadow);
}

.qr-card figcaption {
  margin-top: 0.7rem;
  max-width: 40rem;
  color: var(--muted);
  font-size: 0.92rem;
  line-height: 1.45;
}

.qr-card figcaption a {
  white-space: nowrap;
}

.qr-card--compact {
  margin: 1.25rem 0 1.5rem;
}

.qr-card--compact > a {
  width: 6.5rem;
}

nav {
  display: flex;
  gap: 0.25rem;
}

nav a {
  color: var(--muted);
  text-decoration: none;
  padding: 0.35rem 0.7rem;
  border-radius: 999px;
  font-size: 0.95rem;
}

nav a:hover {
  color: var(--ink);
  background: color-mix(in srgb, var(--ink) 6%, transparent);
}

nav a[aria-current="page"] {
  color: var(--ink);
  background: color-mix(in srgb, var(--ink) 8%, transparent);
  font-weight: 600;
}

main {
  padding: 2.75rem 0 4rem;
}

.kicker {
  margin: 0 0 0.7rem;
  color: var(--accent);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

h1 {
  margin: 0 0 1rem;
  font-size: clamp(2rem, 1.4rem + 2.4vw, 3.15rem);
  line-height: 1.12;
  letter-spacing: -0.045em;
  font-weight: 750;
}

h2 {
  margin: 2.4rem 0 0.7rem;
  font-size: 1.28rem;
  line-height: 1.3;
  letter-spacing: -0.03em;
}

.lead {
  font-size: 1.12rem;
  color: var(--ink);
  max-width: 40rem;
}

.prose p,
.prose li {
  color: var(--ink);
}

.prose p {
  margin: 0 0 1.05rem;
}

.prose p:last-child { margin-bottom: 0; }

.updated {
  margin: 0 0 1.6rem;
  color: var(--faint);
  font-size: 0.92rem;
}

.cards {
  display: grid;
  gap: 1rem;
  margin: 2.1rem 0 0.5rem;
}

.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 1.35rem 1.4rem 1.45rem;
}

.card h2 {
  margin: 0.15rem 0 0.65rem;
  font-size: 1.35rem;
}

.metrics {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.75rem;
  margin: 0.2rem 0 1.05rem;
}

.metric {
  padding: 0.85rem 0.9rem 0.95rem;
  border-radius: 0.9rem;
  background: color-mix(in srgb, var(--ink) 5%, transparent);
}

.metric strong {
  display: block;
  font-size: 1.45rem;
  letter-spacing: -0.04em;
  color: var(--accent-deep);
}

.metric span {
  display: block;
  margin-top: 0.2rem;
  color: var(--muted);
  font-size: 0.88rem;
  line-height: 1.4;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem 1.1rem;
  margin-top: 1.5rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  padding: 0.65rem 1.05rem;
  border-radius: 999px;
  text-decoration: none;
  font-weight: 600;
  font-size: 0.95rem;
}

.btn-solid {
  background: var(--ink);
  color: var(--paper);
}

.btn-solid:hover { color: var(--paper); filter: brightness(1.08); }

.btn-ghost {
  color: var(--ink);
  border: 1px solid var(--line);
}

.note {
  margin-top: 2rem;
  padding: 1rem 1.15rem;
  border-left: 3px solid var(--teal);
  color: var(--muted);
  background: color-mix(in srgb, var(--teal) 8%, transparent);
  border-radius: 0 0.8rem 0.8rem 0;
}

code, .cmd {
  font-family: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
  font-size: 0.88em;
  background: color-mix(in srgb, var(--ink) 7%, transparent);
  padding: 0.12em 0.4em;
  border-radius: 0.35rem;
}

.toc {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem 0.55rem;
  margin: 0 0 2rem;
}

.toc a {
  text-decoration: none;
  color: var(--ink);
  font-size: 0.88rem;
  padding: 0.28rem 0.7rem;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: var(--card);
}

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

.steps {
  list-style: none;
  counter-reset: step;
  padding: 0;
  margin: 0 0 0.5rem;
}

.steps > li {
  counter-increment: step;
  position: relative;
  padding: 0 0 1.6rem 3.1rem;
}

.steps > li:last-child { padding-bottom: 0; }

.steps > li::before {
  content: counter(step);
  position: absolute;
  left: 0;
  top: 0.1rem;
  width: 2.1rem;
  height: 2.1rem;
  border-radius: 999px;
  display: grid;
  place-items: center;
  font-weight: 700;
  font-size: 0.92rem;
  letter-spacing: -0.03em;
  color: var(--paper);
  background: var(--ink);
}

.steps h3 {
  margin: 0.15rem 0 0.4rem;
  font-size: 1.12rem;
  letter-spacing: -0.03em;
}

.cmds {
  margin: 0 0 1.4rem;
}

.cmds dt {
  margin: 1.1rem 0 0.3rem;
}

.cmds dd {
  margin: 0;
}

.react {
  font-variant-emoji: emoji;
  font-weight: 600;
}

.features {
  display: grid;
  gap: 1rem;
  margin: 2.1rem 0 0.25rem;
}

@media (min-width: 720px) {
  .features { grid-template-columns: 1fr 1fr; }
  .qr-card > a { width: 10.5rem; }
  .qr-card--compact > a { width: 8.5rem; }
}

.foot {
  border-top: 1px solid var(--line);
  padding: 1.4rem 0 2rem;
  color: var(--muted);
  font-size: 0.92rem;
}

.foot p { margin: 0; }

.foot-inner {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 0.6rem 1.25rem;
}

@media (max-width: 640px) {
  html { font-size: 100%; }
  .metrics { grid-template-columns: 1fr; }
  main { padding-top: 1.6rem; }
  h1 { font-size: 1.85rem; }
  .top-inner { padding: 0.7rem 0; }
  nav { flex-wrap: wrap; }
  nav a { font-size: 0.86rem; padding: 0.28rem 0.55rem; }
}

@media (prefers-reduced-motion: reduce) {
  .top { backdrop-filter: none; }
}

@media print {
  body { background: white; color: black; }
  .top, .foot, .skip, .hero-actions { display: none; }
  .card { box-shadow: none; border: 1px solid #ccc; }
}