:root {
  color-scheme: light dark;
  --ink: #172335;
  --muted: #5e6876;
  --paper: #f6f7f9;
  --surface: rgba(255, 255, 255, 0.82);
  --surface-solid: #ffffff;
  --line: rgba(23, 35, 53, 0.13);
  --blue: #287cb4;
  --blue-deep: #135a8a;
  --orange: #e96543;
  --orange-soft: #fff0e7;
  --green: #16855b;
  --shadow: 0 24px 60px rgba(23, 35, 53, 0.12);
  --radius: 24px;
  --measure: 72rem;
}

@media (prefers-color-scheme: dark) {
  :root {
    --ink: #eef3f7;
    --muted: #aab7c4;
    --paper: #101721;
    --surface: rgba(27, 38, 52, 0.86);
    --surface-solid: #1b2634;
    --line: rgba(232, 239, 246, 0.13);
    --blue: #55b5ec;
    --blue-deep: #8bd0f5;
    --orange: #ff8a65;
    --orange-soft: #34231f;
    --green: #64d3a8;
    --shadow: 0 24px 60px rgba(0, 0, 0, 0.32);
  }
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  background:
    radial-gradient(circle at 82% 8%, rgba(61, 174, 233, 0.13), transparent 28rem),
    radial-gradient(circle at 10% 22%, rgba(246, 180, 77, 0.10), transparent 24rem),
    var(--paper);
  font: 16px/1.62 Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  text-rendering: optimizeLegibility;
}

a { color: var(--blue-deep); text-underline-offset: 0.18em; }
a:hover { color: var(--orange); }
img { max-width: 100%; }
code, pre { font-family: "SFMono-Regular", Consolas, "Liberation Mono", monospace; }

.skip {
  position: fixed;
  left: 1rem;
  top: -5rem;
  z-index: 20;
  padding: .7rem 1rem;
  color: #fff;
  background: #111;
  border-radius: .6rem;
}
.skip:focus { top: 1rem; }

.shell { width: min(calc(100% - 2rem), var(--measure)); margin-inline: auto; }

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  border-bottom: 1px solid var(--line);
  background: color-mix(in srgb, var(--paper) 82%, transparent);
  backdrop-filter: blur(18px) saturate(130%);
}
.site-header .shell {
  min-height: 4.5rem;
  display: flex;
  align-items: center;
  gap: 1.5rem;
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: .72rem;
  color: var(--ink);
  font-weight: 760;
  letter-spacing: -.02em;
  text-decoration: none;
}
.brand img { width: 2.35rem; height: 2.35rem; }
.nav { margin-left: auto; display: flex; align-items: center; gap: .2rem; }
.nav a {
  padding: .48rem .7rem;
  color: var(--muted);
  border-radius: .65rem;
  font-size: .94rem;
  font-weight: 620;
  text-decoration: none;
}
.nav a:hover, .nav a[aria-current="page"] { color: var(--ink); background: var(--surface); }
.nav .github { margin-left: .45rem; border: 1px solid var(--line); color: var(--ink); }

.hero {
  min-height: 38rem;
  display: grid;
  grid-template-columns: 1.12fr .88fr;
  align-items: center;
  gap: clamp(2rem, 7vw, 6rem);
  padding-block: clamp(4rem, 9vw, 8rem);
}
.eyebrow {
  display: inline-flex;
  gap: .55rem;
  align-items: center;
  color: var(--green);
  font-size: .78rem;
  font-weight: 800;
  letter-spacing: .12em;
  text-transform: uppercase;
}
.eyebrow::before { content: ""; width: 1.7rem; height: 2px; background: currentColor; }
h1, h2, h3 { line-height: 1.12; letter-spacing: -.035em; }
h1 { max-width: 13ch; margin: .8rem 0 1.25rem; font-size: clamp(3rem, 7vw, 5.8rem); }
h2 { margin: 0 0 1rem; font-size: clamp(2rem, 4vw, 3.25rem); }
h3 { margin: 0 0 .6rem; font-size: 1.18rem; }
.lede { max-width: 39rem; margin: 0; color: var(--muted); font-size: clamp(1.08rem, 2vw, 1.3rem); }
.actions { display: flex; flex-wrap: wrap; gap: .75rem; margin-top: 2rem; }
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 3rem;
  padding: .72rem 1.15rem;
  border: 1px solid var(--line);
  border-radius: .78rem;
  color: var(--ink);
  background: var(--surface);
  font-weight: 720;
  text-decoration: none;
  box-shadow: 0 8px 24px rgba(23, 35, 53, 0.06);
}
.button.primary { color: white; background: linear-gradient(135deg, #287cb4, #135a8a); border-color: transparent; }
.button:hover { transform: translateY(-1px); color: var(--ink); }
.button.primary:hover { color: white; background: linear-gradient(135deg, #3195d4, #17699f); }

.product-card {
  position: relative;
  padding: 1.35rem;
  border: 1px solid var(--line);
  border-radius: 2rem;
  background: var(--surface);
  box-shadow: var(--shadow);
  transform: rotate(1.5deg);
}
.product-card::after {
  content: "";
  position: absolute;
  inset: 1rem -1rem -1rem 1rem;
  z-index: -1;
  border-radius: 2rem;
  background: linear-gradient(135deg, rgba(61,174,233,.22), rgba(246,180,77,.22));
}
.window-bar { display: flex; gap: .42rem; padding: .2rem .1rem 1rem; }
.window-bar i { display: block; width: .72rem; height: .72rem; border-radius: 50%; background: #ed6a5e; }
.window-bar i:nth-child(2) { background: #f4bd4f; }
.window-bar i:nth-child(3) { background: #61c454; }
.volume-row {
  display: grid;
  grid-template-columns: 4.3rem 1fr auto;
  gap: 1rem;
  align-items: center;
  padding: 1rem;
  border-radius: 1rem;
  background: color-mix(in srgb, var(--surface-solid) 88%, transparent);
}
.volume-row img { width: 4.3rem; }
.volume-row strong, .volume-row span { display: block; }
.volume-row span { color: var(--muted); font-size: .9rem; }
.pill { padding: .35rem .62rem; border-radius: 999px; color: var(--green); background: color-mix(in srgb, var(--green) 12%, transparent); font-size: .74rem; font-weight: 780; }
.file-list { margin-top: .75rem; border-top: 1px solid var(--line); }
.file-list div { display: flex; justify-content: space-between; padding: .72rem .2rem; border-bottom: 1px solid var(--line); color: var(--muted); font-size: .9rem; }
.file-list strong { color: var(--ink); font-weight: 620; }

.section { padding-block: clamp(4rem, 8vw, 7rem); }
.section-head { max-width: 46rem; margin-bottom: 2.4rem; }
.section-head p { margin: 0; color: var(--muted); font-size: 1.08rem; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1rem; }
.card { padding: 1.45rem; border: 1px solid var(--line); border-radius: var(--radius); background: var(--surface); }
.card p { margin: 0; color: var(--muted); }
.number { display: grid; place-items: center; width: 2rem; height: 2rem; margin-bottom: 1rem; border-radius: .62rem; color: var(--orange); background: var(--orange-soft); font-weight: 850; }
.feature-icon { width: 2.7rem; height: 2.7rem; display: grid; place-items: center; margin-bottom: 1rem; border-radius: .85rem; color: var(--blue); background: color-mix(in srgb, var(--blue) 12%, transparent); font-weight: 850; }

.band { margin-block: 2rem; padding: clamp(1.6rem, 4vw, 3rem); border-radius: var(--radius); color: #f8fbfd; background: #172335; }
.band p { color: #b8c4cf; }
.band a { color: #8bd0f5; }
.band .button { color: #fff; border-color: rgba(255,255,255,.2); background: rgba(255,255,255,.08); }

.page-hero { max-width: 54rem; padding: clamp(4rem, 8vw, 7rem) 0 2.5rem; }
.page-hero h1 { max-width: 18ch; font-size: clamp(2.8rem, 6vw, 4.8rem); }
.content-layout { display: grid; grid-template-columns: 14rem minmax(0, 1fr); gap: clamp(2rem, 6vw, 5rem); padding-bottom: 6rem; }
.toc { position: sticky; top: 6.5rem; align-self: start; }
.toc strong { display: block; margin-bottom: .6rem; font-size: .8rem; text-transform: uppercase; letter-spacing: .1em; }
.toc a { display: block; padding: .32rem 0; color: var(--muted); text-decoration: none; }
.toc a:hover { color: var(--ink); }
.prose { min-width: 0; max-width: 49rem; }
.prose section { scroll-margin-top: 6rem; margin-bottom: 4rem; }
.prose h2 { font-size: clamp(1.8rem, 3vw, 2.45rem); }
.prose h3 { margin-top: 2rem; }
.prose p, .prose li { color: var(--muted); }
.prose strong { color: var(--ink); }
.prose ul, .prose ol { padding-left: 1.3rem; }
.prose li + li { margin-top: .45rem; }
.prose table { width: 100%; border-collapse: collapse; margin: 1.25rem 0; font-size: .94rem; }
.prose th, .prose td { padding: .78rem; text-align: left; vertical-align: top; border-bottom: 1px solid var(--line); }
.prose th { color: var(--ink); }
pre { overflow-x: auto; margin: 1.2rem 0; padding: 1.1rem 1.2rem; border: 1px solid var(--line); border-radius: 1rem; color: #e7edf2; background: #111923; font-size: .88rem; line-height: 1.6; }
.callout { margin: 1.4rem 0; padding: 1rem 1.15rem; border-left: 4px solid var(--blue); border-radius: .35rem .9rem .9rem .35rem; background: color-mix(in srgb, var(--blue) 8%, var(--surface)); }
.callout.warning { border-color: var(--orange); background: var(--orange-soft); }
.callout p { margin: 0; color: var(--ink); }
.steps { counter-reset: steps; list-style: none; padding: 0 !important; }
.steps li { position: relative; padding: 0 0 1.5rem 3.2rem; }
.steps li::before { counter-increment: steps; content: counter(steps); position: absolute; left: 0; top: -.1rem; display: grid; place-items: center; width: 2.2rem; height: 2.2rem; border-radius: .7rem; color: white; background: var(--blue-deep); font-weight: 800; }

.site-footer { border-top: 1px solid var(--line); padding: 2.5rem 0; }
.footer-grid { display: grid; grid-template-columns: 1fr auto; gap: 2rem; align-items: start; }
.footer-grid p { max-width: 38rem; margin: .55rem 0 0; color: var(--muted); font-size: .9rem; }
.footer-links { display: flex; flex-wrap: wrap; gap: 1rem; }
.footer-links a { color: var(--muted); font-size: .9rem; text-decoration: none; }

@media (max-width: 780px) {
  .site-header { position: static; }
  .site-header .shell { align-items: flex-start; flex-direction: column; gap: .6rem; padding-block: .8rem; }
  .nav { margin-left: -.45rem; flex-wrap: wrap; }
  .nav .github { margin-left: 0; }
  .hero { grid-template-columns: 1fr; min-height: auto; }
  .product-card { transform: none; }
  .grid-3 { grid-template-columns: 1fr; }
  .content-layout { grid-template-columns: 1fr; }
  .toc { position: static; display: flex; flex-wrap: wrap; gap: .35rem .8rem; padding-bottom: 1rem; border-bottom: 1px solid var(--line); }
  .toc strong { width: 100%; }
  .toc a { display: inline; }
  .footer-grid { grid-template-columns: 1fr; }
}

.app-preview { margin: 0; min-width: 0; }
.app-preview img { display: block; width: 100%; height: auto; border: 1px solid var(--line); border-radius: 10px; }
.app-preview figcaption { margin-top: .75rem; font-size: .9rem; color: var(--muted); }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition: none !important; }
}