/* The page shares hexrack's look on purpose: same type, same dark zinc, one amber accent.
   Self-hosted font, so a visit makes no third-party request; see licences/. */
@font-face {
  font-family: 'Archivo';
  src: url('fonts/archivo-variable-latin.woff2') format('woff2');
  font-weight: 100 900;
  font-stretch: 62% 125%;
  font-display: swap;
}

:root {
  color-scheme: dark;
  --bg: #09090b;
  --panel: #18181b;
  --panel-2: #0f0f12;
  --line: #27272a;
  --ink: #f4f4f5;
  --ink-2: #d4d4d8;
  --muted: #a1a1aa;
  --faint: #71717a;
  --accent: #f59e0b;
  --accent-hi: #fbbf24;
  --accent-ink: #09090b;
  --cyan: #38d6ff;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font: 400 16px/1.6 'Archivo', ui-sans-serif, system-ui, sans-serif;
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; }
code { font: 0.88em ui-monospace, 'SF Mono', Menlo, monospace; color: var(--ink-2); }

.wrap { max-width: 72rem; margin: 0 auto; padding: 0 16px; }
@media (min-width: 640px) { .wrap { padding: 0 24px; } }
@media (min-width: 1024px) { .wrap { padding: 0 32px; } }

/* ---- header ---- */
.top { display: flex; justify-content: space-between; align-items: center; padding: 28px 0; }
.brand { font-weight: 800; font-stretch: 125%; letter-spacing: -0.01em; text-decoration: none; }
.top nav { display: flex; gap: 24px; font-size: 0.92rem; color: var(--muted); }
.top nav a { text-decoration: none; transition: color 0.15s; }
.top nav a:hover { color: var(--accent-hi); }
@media (max-width: 560px) { .top nav { display: none; } }

/* ---- type ---- */
h1, h2 { font-stretch: 112.5%; letter-spacing: -0.025em; line-height: 1.05; margin: 0; }
h1 { font-size: clamp(2.4rem, 6vw, 3.9rem); font-weight: 800; }
h2 { font-size: clamp(1.9rem, 4vw, 2.5rem); font-weight: 750; }
h3 { font-size: 1.05rem; font-weight: 650; margin: 0; }
.eyebrow {
  display: inline-block; margin-bottom: 20px; font-size: 0.78rem; font-weight: 600;
  letter-spacing: 0.14em; text-transform: uppercase; color: var(--accent-hi);
}
.lede { color: var(--muted); font-size: 1.15rem; max-width: 34rem; margin: 22px 0 0; }
.intro { color: var(--muted); max-width: 42rem; margin: 14px 0 36px; }
.fine { color: var(--faint); font-size: 0.88rem; margin-top: 28px; max-width: 30rem; }

section { padding: 72px 0; border-top: 1px solid var(--line); scroll-margin-top: 16px; }

/* ---- hero ---- */
.hero { display: grid; gap: 48px; align-items: center; padding: 40px 0 88px; border: 0; }
@media (min-width: 960px) { .hero { grid-template-columns: 1fr 1.1fr; } }
.hero-media {
  position: relative; border: 1px solid var(--line); border-radius: 16px; overflow: hidden;
  background: #03070c; box-shadow: 0 0 80px -20px rgba(56, 214, 255, 0.25);
  aspect-ratio: 3 / 2;
}
.hero-media video { display: block; width: 100%; height: 100%; object-fit: cover; }
.cta { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 34px; }

.btn {
  display: inline-flex; align-items: center; gap: 10px; padding: 13px 20px; border-radius: 10px;
  font: inherit; font-weight: 600; text-decoration: none; cursor: pointer;
  border: 1px solid var(--line); background: var(--panel-2); color: var(--ink);
  transition: border-color 0.15s, background 0.15s, color 0.15s;
}
.btn:hover { border-color: #52525b; }
.btn.primary { background: var(--accent); border-color: var(--accent); color: var(--accent-ink); }
.btn.primary:hover { background: var(--accent-hi); border-color: var(--accent-hi); }
.btn small { font-weight: 400; opacity: 0.75; font-size: 0.82rem; }
.btn:focus-visible, .view:focus-visible { outline: 2px solid var(--accent-hi); outline-offset: 2px; }

/* ---- figures strip ---- */
.figures { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1px; background: var(--line);
  border: 1px solid var(--line); border-radius: 14px; overflow: hidden; margin-top: 8px; }
@media (min-width: 800px) { .figures { grid-template-columns: repeat(4, 1fr); } }
.figure { background: var(--bg); padding: 22px 20px; }
.figure b { display: block; font-size: 1.9rem; font-weight: 750; font-stretch: 112.5%; letter-spacing: -0.02em; }
.figure span { color: var(--muted); font-size: 0.9rem; }

/* ---- cards ---- */
.grid { display: grid; gap: 16px; }
@media (min-width: 800px) { .grid.three { grid-template-columns: repeat(3, 1fr); } .grid.two { grid-template-columns: repeat(2, 1fr); } }
.card { background: var(--panel-2); border: 1px solid var(--line); border-radius: 14px; padding: 24px; }
.card p { color: var(--muted); margin: 10px 0 0; font-size: 0.95rem; }
.card .dot { display: inline-block; width: 8px; height: 8px; border-radius: 50%; background: var(--accent);
  margin-right: 10px; vertical-align: 2px; box-shadow: 0 0 10px var(--accent); }

/* ---- tables ---- */
.table-wrap { overflow-x: auto; border: 1px solid var(--line); border-radius: 14px; margin-top: 16px; }
table { width: 100%; border-collapse: collapse; font-size: 0.95rem; }
th, td { text-align: left; padding: 14px 18px; border-bottom: 1px solid var(--line); white-space: nowrap; }
th { color: var(--faint); font-weight: 500; font-size: 0.8rem; letter-spacing: 0.06em; text-transform: uppercase; }
tr:last-child td { border-bottom: 0; }
td.hi { color: var(--accent-hi); font-weight: 650; }
.caption { color: var(--faint); font-size: 0.85rem; margin-top: 12px; }

/* ---- parts ---- */
.fan-pick { display: inline-flex; border: 1px solid var(--line); border-radius: 10px; padding: 4px; margin-bottom: 24px; }
.fan-pick label { padding: 8px 14px; border-radius: 7px; cursor: pointer; font-weight: 600; font-size: 0.92rem; color: var(--muted); }
.fan-pick input { position: absolute; opacity: 0; pointer-events: none; }
.fan-pick label:has(input:checked) { background: var(--panel); color: var(--ink); }
.fan-pick label:has(input:focus-visible) { outline: 2px solid var(--accent-hi); }
/* Only the files for the picked fan show; the parts both fans share always do. */
body:has(#fan-a4x10:checked) [data-fan="NF-A4x20"],
body:has(#fan-a4x20:checked) [data-fan="NF-A4x10"] { display: none; }

.part { display: flex; flex-direction: column; }
.part .head { display: flex; justify-content: space-between; align-items: baseline; gap: 12px; }
.part .count { color: var(--accent-hi); font-weight: 650; white-space: nowrap; font-size: 0.9rem; }
.part .size { color: var(--faint); font-size: 0.85rem; margin-top: 10px; font-variant-numeric: tabular-nums; }
.part .actions { display: flex; flex-wrap: wrap; gap: 8px; margin-top: auto; padding-top: 20px; }
.view {
  font: inherit; font-size: 0.92rem; background: none; border: 0; color: var(--muted); cursor: pointer;
  padding: 13px 4px; text-decoration: underline; text-underline-offset: 4px; text-decoration-color: var(--line);
}
.view:hover { color: var(--accent-hi); }
.all { margin-top: 16px; display: flex; flex-wrap: wrap; align-items: center; gap: 16px;
  justify-content: space-between; }
.all p { margin: 0; color: var(--muted); }

/* ---- steps ---- */
.steps { list-style: none; padding: 0; margin: 0; counter-reset: step; display: grid; gap: 16px; }
@media (min-width: 800px) { .steps { grid-template-columns: repeat(2, 1fr); } }
.steps > li { counter-increment: step; position: relative; padding-left: 56px; }
.steps > li::before {
  content: counter(step); position: absolute; left: 22px; top: 22px; width: 24px; height: 24px;
  border-radius: 50%; border: 1px solid var(--accent); color: var(--accent-hi);
  font-size: 0.8rem; font-weight: 700; display: grid; place-items: center;
}
.need { margin: 0; padding-left: 18px; color: var(--muted); }
.need li { margin: 6px 0; }

/* ---- viewer ---- */
dialog {
  width: min(960px, calc(100vw - 32px)); height: min(680px, calc(100vh - 32px)); padding: 0;
  border: 1px solid var(--line); border-radius: 16px; background: var(--panel-2); color: var(--ink);
}
dialog::backdrop { background: rgba(0, 0, 0, 0.7); backdrop-filter: blur(4px); }
dialog .bar { display: flex; justify-content: space-between; align-items: center; padding: 14px 18px;
  border-bottom: 1px solid var(--line); }
dialog .bar span { color: var(--faint); font-size: 0.85rem; }
dialog .close { background: none; border: 1px solid var(--line); color: var(--ink); border-radius: 8px;
  padding: 6px 12px; cursor: pointer; font: inherit; }
dialog canvas { display: block; width: 100%; height: calc(100% - 57px); cursor: grab; }

footer { border-top: 1px solid var(--line); padding: 32px 0 56px; color: var(--faint); font-size: 0.85rem; }
footer p { margin: 4px 0; }
footer a { color: var(--muted); }