:root {
  color-scheme: dark;
  --bg: #070b12; --bg-panel: #0b111a; --bg-raised: #0f1723; --bg-card: #111b28;
  --line: #1a2636; --line-strong: #263649; --mark: #5a8aa3;
  --text: #dfe7f1; --text-muted: #93a1b5; --text-faint: #7c8ba0;
  --accent: #4fcbe2; --need: #f4b13e; --need-text: #f6bd5a;
  --font-ui: -apple-system, BlinkMacSystemFont, "Segoe UI Variable Text", "Segoe UI", "Noto Sans", system-ui, sans-serif;
  --font-mono: ui-monospace, "SF Mono", "Cascadia Mono", "JetBrains Mono", "Noto Sans Mono", "DejaVu Sans Mono", Menlo, Consolas, monospace;
}
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 64px; }
body { margin: 0; background: var(--bg); color: var(--text); font: 400 17px/1.55 var(--font-ui); -webkit-font-smoothing: antialiased; }
a { color: var(--accent); }
p { margin: 0 0 12px; }
.cap { font-family: var(--font-mono); font-variant-numeric: tabular-nums; font-variant-ligatures: none; }
.wrap { max-width: 1100px; margin: 0 auto; padding: 0 24px; }
main.wrap { padding-bottom: 72px; }
.skip { position: absolute; left: -999px; top: 8px; background: var(--bg-raised); padding: 8px 12px; z-index: 10; }
.skip:focus { left: 8px; }
nav { position: sticky; top: 0; z-index: 5; background: color-mix(in srgb, var(--bg) 94%, transparent); border-bottom: 1px solid var(--line); }
nav ul { list-style: none; margin: 0 auto; padding: 10px 24px; max-width: 1100px; display: flex; flex-wrap: wrap; gap: 4px 18px; font-size: 14px; }
nav a { text-decoration: none; color: var(--text-muted); }
nav a:hover, nav a:focus-visible { color: var(--accent); }
section { padding: 96px 0 72px; }
section:nth-of-type(even) { background: var(--bg-panel); box-shadow: 0 0 0 100vmax var(--bg-panel); clip-path: inset(0 -100vmax); }
#hero { padding-top: 64px; }
footer { margin-top: 64px; color: var(--text-faint); font-size: 14px; }
h1 { font-size: clamp(30px, 5vw, 52px); line-height: 1.12; font-weight: 600; margin: 0 0 18px; text-wrap: balance; }
h2 { font-size: 28px; font-weight: 600; line-height: 1.2; margin: 0 0 12px; text-wrap: balance; }
h3 { font-size: 18px; font-weight: 600; line-height: 1.3; margin: 0 0 8px; }
.lede { font-size: 20px; color: var(--text-muted); max-width: 760px; margin-bottom: 28px; }
.cap { font-size: 13px; color: var(--text-faint); }
.links { display: flex; gap: 16px; flex-wrap: wrap; margin: 20px 0 28px; }
.more { font-size: 14px; }

.media { position: relative; background: var(--bg-panel); border: 1px solid var(--line-strong); }
.media::after { content: ""; position: absolute; inset: -1px; border: 1px solid var(--mark); pointer-events: none; --s: 7px;
  -webkit-mask: conic-gradient(at var(--s) var(--s), #0000 75%, #000 0) 0 0 / calc(100% - var(--s)) calc(100% - var(--s));
          mask: conic-gradient(at var(--s) var(--s), #0000 75%, #000 0) 0 0 / calc(100% - var(--s)) calc(100% - var(--s)); }
.media img { display: block; width: 100%; height: auto; }
.media video.loop { display: block; width: 100%; height: auto; cursor: pointer; }

.eyebrow { font: 600 12px var(--font-mono); letter-spacing: .14em; text-transform: uppercase; color: var(--text-faint); margin: 0 0 16px; }
.btn { display: inline-block; padding: 10px 18px; border: 1px solid var(--line-strong); color: var(--text); text-decoration: none; font: 14px var(--font-mono); }
.btn:hover, .btn:focus-visible { border-color: var(--accent); color: var(--accent); }
.btn.film { background: var(--accent); color: var(--bg); border-color: var(--accent); font-weight: 600; cursor: pointer; }
.btn.film:hover, .btn.film:focus-visible { background: #7ddcee; color: var(--bg); }
.hero-by { margin: -12px 0 22px; }
.stack { max-width: 780px; }
.band { border: 1px solid var(--line-strong); border-left: 3px solid var(--accent); background: var(--bg-panel); padding: 14px 22px; color: var(--text-muted); max-width: 880px; margin-top: 32px; }
.band p { margin: 0; }

.scroll { overflow-x: auto; margin: 8px 0 20px; }
.diagram { display: block; width: 100%; height: auto; min-width: 860px; font-family: var(--font-ui); }
.diagram .panel rect { fill: var(--bg-panel); stroke: var(--line-strong); }
.diagram .panel.off rect { stroke: var(--line); }
.diagram .corner { fill: none; stroke: var(--mark); stroke-width: 1; }
.diagram .n { font: 12px var(--font-mono); fill: var(--text-faint); }
.diagram .t { font-size: 17px; font-weight: 600; fill: var(--text); }
.diagram .t.off { fill: var(--text-faint); font-weight: 500; }
.diagram .s { font-size: 13px; fill: var(--text-muted); }
.diagram .wire { fill: none; stroke: var(--accent); stroke-width: 2; }
.diagram .wire.off { stroke: var(--line-strong); stroke-dasharray: 4 4; }
.diagram .tip { fill: var(--accent); }
.diagram .x { fill: none; stroke: var(--text-faint); stroke-width: 2; }
.diagram .wall { fill: none; stroke: var(--accent); stroke-width: 1.5; stroke-dasharray: 6 5; }
.diagram .wl { font: 12px var(--font-mono); fill: var(--accent); }
.diagram .hm { fill: var(--need); }
.diagram .h { font: 12.5px var(--font-mono); fill: var(--need-text); }
.diagram .w { font: 12.5px var(--font-mono); fill: var(--accent); }
.diagram .w.off { fill: var(--text-faint); }
.diagram .file rect { fill: var(--bg-card); stroke: var(--line-strong); }
.diagram .ft { font: 13.5px var(--font-mono); fill: var(--text); }
.diagram .fs { font: 11.5px var(--font-mono); fill: var(--text-faint); }
.diagram .panel.ours rect { stroke: var(--accent); }
.diagram .panel.slot rect { fill: none; stroke-dasharray: 5 4; }
.diagram .link { fill: none; stroke: var(--mark); stroke-width: 1.5; }
.diagram .tipn { fill: var(--mark); }

.hero-stage { position: relative; }
video.film { display: block; width: 100%; height: auto; border: 1px solid var(--line-strong); background: #000; }
.bigplay { position: absolute; z-index: 2; left: 50%; top: 45%; transform: translate(-50%, -50%); display: flex; flex-direction: column;
  align-items: center; gap: 12px; padding: 0; border: 0; background: none; color: var(--text); font: 600 16px var(--font-mono); cursor: pointer; }
.bigplay .ring { width: 96px; height: 96px; border-radius: 50%; border: 2px solid var(--accent); display: grid; place-items: center;
  font-size: 36px; padding-left: 6px; color: var(--accent); background: color-mix(in srgb, var(--bg) 80%, transparent); box-shadow: 0 8px 32px rgba(0,0,0,.65); }
.bigplay .lbl { padding: 6px 12px; background: color-mix(in srgb, var(--bg) 85%, transparent); }
.bigplay:hover .ring, .bigplay:focus-visible .ring { background: var(--accent); color: var(--bg); }
.points { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; margin: 32px 0 0; padding: 0; list-style: none; }
.points li { position: relative; padding-left: 18px; color: var(--text-muted); font-size: 15px; line-height: 1.45; }
.points li::before { content: ""; position: absolute; left: 0; top: 7px; width: 8px; height: 8px; background: var(--accent); }
.points b { display: block; color: var(--text); font-size: 17px; margin-bottom: 2px; }

figure { margin: 0; }
figcaption { margin-top: 8px; text-align: center; }

.cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 32px 24px; }
@media (max-width: 960px) { .cards { grid-template-columns: 1fr 1fr; } }
.cards .card.big { grid-column: 1 / -1; }
.cards .card.big p { max-width: 760px; }
.cards .media::before { content: "▶ Play"; position: absolute; right: 12px; bottom: 12px; z-index: 1; padding: 6px 12px; border: 1px solid var(--accent);
  background: color-mix(in srgb, var(--bg) 88%, transparent); color: var(--accent); font: 600 13px var(--font-mono); pointer-events: none; }
.cards .media:hover::before { background: var(--accent); color: var(--bg); }
.cards .card.big .media::before { display: none; }
.cards video.loop:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
.shrink { position: absolute; top: 10px; right: 10px; z-index: 2; padding: 6px 12px; border: 1px solid var(--line-strong); cursor: pointer;
  background: color-mix(in srgb, var(--bg) 88%, transparent); color: var(--text); font: 13px var(--font-mono); }
.shrink:hover, .shrink:focus-visible { border-color: var(--accent); color: var(--accent); }
::view-transition-group(*) { animation-duration: .35s; }
.card h3 { margin: 14px 0 6px; }
.card p { color: var(--text-muted); margin-bottom: 6px; }

.facts { margin: 0 0 20px; padding: 0; list-style: none; max-width: 820px; }
.facts li { padding: 10px 0 10px 22px; border-top: 1px solid var(--line); position: relative; }
.facts li:last-child { border-bottom: 1px solid var(--line); }
.facts li::before { content: ""; position: absolute; left: 0; top: 19px; width: 8px; height: 8px; background: var(--accent); }
.facts b { color: var(--text); }
.facts li { color: var(--text-muted); }

details { border: 1px solid var(--line); background: var(--bg-panel); margin: 0 0 10px; }
details[open] { border-color: var(--line-strong); }
summary { cursor: pointer; padding: 14px 20px; font-weight: 600; list-style: none; display: flex; justify-content: space-between; gap: 16px; }
summary::-webkit-details-marker { display: none; }
summary::after { content: "+"; font-family: var(--font-mono); color: var(--text-faint); }
details[open] summary::after { content: "−"; }
summary:hover, summary:focus-visible { color: var(--accent); }
details .body { padding: 0 20px 16px; color: var(--text-muted); }
details .body p:last-child { margin-bottom: 0; }
details .body figure { margin: 8px 0 14px; max-width: 640px; }

table { width: 100%; border-collapse: collapse; font-size: 14px; }
th, td { text-align: left; vertical-align: top; padding: 9px 12px; border: 1px solid var(--line); }
thead th { background: var(--bg-raised); font-weight: 600; }
.tscroll { overflow-x: auto; }
table.cmp { min-width: 1000px; }
table.cmp tbody th[scope=row] { font-weight: 600; min-width: 120px; }
table.cmp td { color: var(--text-muted); min-width: 90px; }
table.cmp td:nth-child(2) { color: var(--text); min-width: 140px; }
table.cmp .v { color: var(--text); }
table.cmp .v::before { content: ""; display: inline-block; width: 10px; height: 10px; margin-right: 7px; border: 1.5px solid var(--text-faint); }
table.cmp .v.yes::before { background: var(--accent); border-color: var(--accent); }
table.cmp .v.part::before { background: linear-gradient(90deg, var(--accent) 50%, transparent 0); border-color: var(--accent); }
table.cmp .v.nd::before { border-style: dashed; }

.limits { border: 1px solid var(--line-strong); border-left: 3px solid var(--need); background: var(--bg-panel); padding: 18px 22px; max-width: 880px; }
.limits h3 { margin-bottom: 10px; }
.limits h3::before { content: ""; display: inline-block; width: 8px; height: 8px; margin-right: 10px; background: var(--need); vertical-align: 1px; }
.limits ul { margin: 0; padding-left: 20px; color: var(--text-muted); }
.limits p { color: var(--text-muted); margin: 0; }

@media (max-width: 640px) {
  .cards { grid-template-columns: 1fr; }
  .points { grid-template-columns: 1fr; gap: 14px; }
  .bigplay .ring { width: 72px; height: 72px; font-size: 28px; }
  body { font-size: 16px; }
  section { padding: 64px 0 40px; }
  #hero { padding-top: 44px; }
  .wrap, nav ul { padding-left: 16px; padding-right: 16px; }
}