:root {
  --bg: #0a0a16;
  --panel: #161630;
  --panel2: #21214a;
  --ink: #dff6ff;
  --dim: rgba(223, 246, 255, 0.66);
  --faint: rgba(223, 246, 255, 0.14);
  --cyan: #27e0e0;
  --cyan-light: #8ff8ff;
  --cyan-dark: #0d5f68;
  --pink: #ff4fa8;
  --violet: #8b8cf8;
  --logo: "Press Start 2P", ui-monospace, Menlo, monospace;
  --body: "Space Grotesk", -apple-system, "Helvetica Neue", sans-serif;
}
* { box-sizing: border-box; }
html { background: var(--bg); scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  font: 17px/1.65 var(--body);
  background:
    radial-gradient(ellipse at 50% 0%, rgba(39, 224, 224, 0.1), transparent 55%),
    linear-gradient(rgba(39, 224, 224, 0.04) 1px, transparent 1px) 0 0 / 16px 16px,
    linear-gradient(90deg, rgba(39, 224, 224, 0.04) 1px, transparent 1px) 0 0 / 16px 16px,
    var(--bg);
  overflow-x: hidden;
}
a { color: var(--cyan-light); }
a:focus-visible { outline: 2px solid var(--cyan-light); outline-offset: 3px; }

header.top {
  position: sticky;
  top: 0;
  z-index: 20;
  padding-top: env(safe-area-inset-top);
  background: rgba(10, 10, 22, 0.86);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
  border-bottom: 2px solid var(--faint);
}
.bar { max-width: 820px; margin: 0 auto; padding: 0 16px; height: 60px; display: flex; align-items: center; gap: 14px; }
.brand { display: flex; align-items: center; gap: 10px; text-decoration: none; }
.brand img { width: 30px; height: 30px; image-rendering: pixelated; }
.brand span { font: 13px/1 var(--logo); color: var(--cyan-light); text-shadow: 0 0 8px rgba(143, 248, 255, 0.8); }
.bar nav { margin-left: auto; display: flex; gap: 20px; }
.bar nav a { font-weight: 600; font-size: 14px; letter-spacing: 1px; color: var(--dim); text-decoration: none; padding: 8px 2px; border-bottom: 2px solid transparent; }
.bar nav a:hover, .bar nav a[aria-current="page"] { color: var(--cyan-light); border-bottom-color: var(--cyan); }

main { max-width: 820px; margin: 0 auto; padding: 44px 16px 64px; }
.eyebrow { font-weight: 700; font-size: 13px; letter-spacing: 2px; color: var(--pink); margin: 0 0 8px; }
h1 { font-weight: 700; font-size: clamp(32px, 7vw, 46px); line-height: 1.1; margin: 0 0 10px; color: var(--cyan-light); text-shadow: 0 0 14px rgba(143, 248, 255, 0.35); }
.meta { color: var(--dim); font-size: 14px; margin: 0 0 28px; }
.lede { font-size: 19px; margin: 0 0 30px; padding-left: 16px; border-left: 3px solid var(--cyan); max-width: 62ch; }

.chips { display: flex; flex-wrap: wrap; gap: 8px; margin: 0 0 34px; }
.chip { font-size: 13px; font-weight: 600; padding: 6px 12px; border-radius: 999px; background: rgba(39, 224, 224, 0.1); border: 1px solid var(--cyan-dark); color: var(--cyan-light); }
.chip::before { content: "✓ "; }

nav.toc { background: var(--panel); border: 1px solid var(--faint); border-radius: 12px; padding: 18px 20px; margin: 0 0 40px; }
nav.toc p { margin: 0 0 10px; font-size: 12px; font-weight: 700; letter-spacing: 1.5px; color: var(--dim); }
nav.toc ol { margin: 0; padding: 0; list-style: none; columns: 2; column-gap: 24px; }
nav.toc li { break-inside: avoid; margin-bottom: 6px; }
nav.toc a { color: var(--ink); text-decoration: none; font-size: 15px; }
nav.toc a:hover { color: var(--cyan-light); }
nav.toc .n { color: var(--pink); font-variant-numeric: tabular-nums; margin-right: 8px; font-weight: 700; }

section { padding: 28px 0; border-top: 1px solid var(--faint); scroll-margin-top: 80px; }
section:first-of-type { border-top: none; padding-top: 0; }
h2 { font-weight: 700; font-size: 22px; margin: 0 0 6px; display: flex; gap: 12px; align-items: baseline; }
h2 .n { font-size: 13px; color: var(--pink); background: rgba(255, 79, 168, 0.12); border-radius: 6px; padding: 2px 8px; }
h2.group { font-size: 13px; letter-spacing: 2px; color: var(--pink); margin: 0 0 4px; }
h3 { font-weight: 700; font-size: 21px; margin: 2px 0 8px; }
p { margin: 10px 0; }
.dim { color: var(--dim); font-size: 15px; }
ul { margin: 10px 0; padding-left: 22px; }
li { margin: 6px 0; }
strong { color: #fff; }
.qa + .qa { margin-top: 18px; }
.qa > p:first-child { margin-bottom: 4px; }

.table-wrap { overflow-x: auto; margin: 14px 0; }
table { border-collapse: collapse; width: 100%; font-size: 15px; }
th, td { text-align: left; padding: 10px; border-bottom: 1px solid var(--faint); vertical-align: top; }
th { font-size: 12px; letter-spacing: 1.5px; color: var(--dim); }

.card { background: var(--panel); border: 1px solid var(--faint); border-radius: 12px; padding: 20px 22px; }
.card.ai { border-color: rgba(139, 140, 248, 0.5); box-shadow: 0 0 24px rgba(139, 140, 248, 0.15); }
.contact { display: flex; flex-wrap: wrap; gap: 10px; margin: 0 0 36px; }
.contact a { flex: 1 1 220px; display: flex; gap: 12px; align-items: center; text-decoration: none; color: var(--ink); background: var(--panel); border: 1px solid var(--faint); border-radius: 12px; padding: 14px 16px; }
.contact a:hover { border-color: var(--cyan); }
.contact .icon { width: 34px; height: 34px; border-radius: 9px; display: grid; place-items: center; background: rgba(39, 224, 224, 0.12); color: var(--cyan-light); flex-shrink: 0; }
.contact strong { display: block; }
.contact .sub { color: var(--dim); font-size: 13px; overflow-wrap: anywhere; }

footer { max-width: 820px; margin: 0 auto; padding: 22px 16px max(26px, env(safe-area-inset-bottom)); border-top: 2px solid var(--faint); color: var(--dim); font-size: 14px; display: flex; flex-wrap: wrap; gap: 10px 18px; justify-content: space-between; }
footer nav { display: flex; gap: 16px; flex-wrap: wrap; }
footer a { color: var(--dim); text-decoration: none; }
footer a:hover { color: var(--cyan-light); }

@media (max-width: 560px) {
  nav.toc ol { columns: 1; }
  .bar nav { gap: 14px; }
  .bar nav a { font-size: 13px; }
  .brand span { font-size: 11px; }
}