:root {
  --bg: #071118;
  --bg-2: #0a161e;
  --panel: #0d1b24;
  --panel-2: #10212b;
  --ink: #eef4f6;
  --muted: #8da0aa;
  --soft: #bac7cd;
  --line: rgba(159, 190, 202, .17);
  --line-strong: rgba(159, 190, 202, .31);
  --accent: #61d8f2;
  --accent-soft: rgba(97, 216, 242, .12);
  --success: #74d9b6;
  --shell: min(1280px, calc(100vw - 48px));
  --header: 82px;
  --sans: "Helvetica Neue", Helvetica, Arial, sans-serif;
  --mono: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; background: var(--bg); }
body { margin: 0; min-width: 320px; background: var(--bg); color: var(--ink); font-family: var(--sans); font-size: 16px; line-height: 1.55; overflow-x: hidden; }
body::before { content: ""; position: fixed; inset: 0; z-index: -3; background:
  radial-gradient(circle at 76% 8%, rgba(67, 169, 198, .10), transparent 28%),
  linear-gradient(180deg, #071118 0%, #08141b 45%, #071118 100%); }
body::after { content: ""; position: fixed; inset: 0; z-index: -2; opacity: .24; background-image:
  linear-gradient(rgba(130, 170, 185, .045) 1px, transparent 1px),
  linear-gradient(90deg, rgba(130, 170, 185, .045) 1px, transparent 1px);
  background-size: 64px 64px; mask-image: linear-gradient(to bottom, black, transparent 86%); }

::selection { background: var(--accent); color: #031017; }
a { color: inherit; text-decoration: none; }
button, input, textarea, select { font: inherit; }
img, svg { display: block; max-width: 100%; }

.shell { width: var(--shell); margin-inline: auto; }
.section { padding-block: clamp(96px, 12vw, 170px); }
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0; }
.skip-link { position: fixed; left: 16px; top: 12px; z-index: 1000; transform: translateY(-150%); padding: 10px 14px; background: var(--accent); color: #041017; }
.skip-link:focus { transform: translateY(0); }
.noise { pointer-events: none; position: fixed; inset: 0; z-index: 100; opacity: .04; background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 160 160' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.9' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='.8'/%3E%3C/svg%3E"); }
.top-progress { position: fixed; z-index: 120; top: 0; left: 0; width: 100%; height: 2px; }
.top-progress span { display: block; width: 100%; height: 100%; background: var(--accent); transform: scaleX(0); transform-origin: left; }

.site-header { position: fixed; z-index: 90; top: 0; left: 0; width: 100%; height: var(--header); border-bottom: 1px solid transparent; transition: background .3s, border-color .3s, backdrop-filter .3s; }
.site-header.is-scrolled { background: rgba(7,17,24,.82); border-color: var(--line); backdrop-filter: blur(18px); }
.nav-wrap { height: 100%; display: flex; align-items: center; justify-content: space-between; gap: 32px; }
.brand { display: inline-flex; align-items: center; gap: 12px; min-width: max-content; }
.brand-mark { position: relative; display: grid; width: 31px; height: 31px; border: 1px solid var(--line-strong); }
.brand-mark::before, .brand-mark::after { content: ""; position: absolute; background: var(--accent); }
.brand-mark::before { width: 1px; height: 41px; left: 14px; top: -6px; transform: rotate(45deg); opacity: .55; }
.brand-mark::after { width: 5px; height: 5px; right: 4px; top: 4px; box-shadow: -11px 11px 0 rgba(97,216,242,.65), -21px 21px 0 rgba(97,216,242,.32); }
.brand-mark i { display: none; }
.brand-type { display: flex; align-items: baseline; letter-spacing: -.025em; }
.brand-type strong { font-size: 15px; font-weight: 700; }
.brand-type b { margin-left: 3px; color: var(--accent); font-family: var(--mono); font-size: 12px; letter-spacing: .02em; }
.nav { display: flex; align-items: center; gap: 8px; }
.nav > a { padding: 10px 14px; color: var(--soft); font-family: var(--mono); font-size: 11px; letter-spacing: .06em; text-transform: uppercase; transition: color .2s, background .2s; }
.nav > a:hover { color: var(--ink); }
.nav .nav-cta { margin-left: 12px; border: 1px solid var(--line-strong); color: var(--ink); background: rgba(255,255,255,.015); }
.nav .nav-cta:hover { background: var(--accent); border-color: var(--accent); color: #051118; }
.nav-toggle { display: none; border: 0; background: none; width: 44px; height: 44px; padding: 12px; }
.nav-toggle span:not(.sr-only) { display: block; height: 1px; background: var(--ink); margin: 5px 0; }

.hero { position: relative; min-height: 920px; padding-top: calc(var(--header) + clamp(75px, 8vw, 120px)); display: grid; grid-template-columns: .91fr 1.09fr; gap: clamp(46px, 7vw, 110px); align-items: start; }
.hero::before { content: ""; position: absolute; left: 48%; top: var(--header); bottom: 84px; width: 1px; background: linear-gradient(to bottom, transparent, var(--line), transparent); }
.hero-copy { padding-top: 42px; }
.kicker { margin: 0 0 36px; display: flex; gap: 18px; align-items: center; font-family: var(--mono); font-size: 10px; letter-spacing: .08em; text-transform: uppercase; color: var(--accent); }
.kicker i { color: var(--muted); font-style: normal; }
.kicker i::before { content: ""; display: inline-block; width: 24px; height: 1px; margin-right: 10px; vertical-align: middle; background: var(--line-strong); }
h1, h2, h3 { margin: 0; font-weight: 500; letter-spacing: -.055em; line-height: .98; }
h1 { max-width: 760px; font-size: clamp(64px, 7.2vw, 112px); }
h1 em, h2 em { color: var(--accent); font-style: normal; font-weight: 300; }
.hero-lede { max-width: 630px; margin: 34px 0 0; color: var(--soft); font-size: clamp(18px, 1.5vw, 23px); line-height: 1.48; letter-spacing: -.012em; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 42px; }
.button { min-height: 52px; display: inline-flex; align-items: center; justify-content: center; gap: 30px; padding: 0 20px; border: 1px solid var(--line-strong); font-family: var(--mono); font-size: 11px; letter-spacing: .06em; text-transform: uppercase; transition: background .2s, border-color .2s, color .2s, transform .2s; }
.button:hover { transform: translateY(-2px); }
.button-primary { background: var(--accent); border-color: var(--accent); color: #041118; }
.button-primary:hover { background: #85e5f7; border-color: #85e5f7; }
.button-quiet { color: var(--ink); background: rgba(255,255,255,.01); }
.button-quiet:hover { border-color: var(--accent); color: var(--accent); }
.hero-index { margin: 74px 0 0; display: grid; grid-template-columns: repeat(4, 1fr); border-top: 1px solid var(--line); }
.hero-index div { padding: 15px 12px 0 0; border-right: 1px solid var(--line); }
.hero-index div:last-child { border-right: 0; padding-left: 12px; }
.hero-index dt { color: var(--accent); font-family: var(--mono); font-size: 9px; }
.hero-index dd { margin: 7px 0 0; color: var(--muted); font-family: var(--mono); font-size: 10px; text-transform: uppercase; letter-spacing: .06em; }

.hero-system { align-self: center; padding-top: 10px; }
.system-frame { position: relative; border: 1px solid var(--line-strong); background: linear-gradient(145deg, rgba(13,31,41,.84), rgba(8,20,27,.6)); box-shadow: 0 30px 90px rgba(0,0,0,.25); }
.system-frame::before { content: ""; position: absolute; inset: 14px; pointer-events: none; border: 1px solid rgba(97,216,242,.06); }
.frame-head, .frame-foot { min-height: 44px; display: flex; align-items: center; justify-content: space-between; padding: 0 16px; border-bottom: 1px solid var(--line); color: var(--muted); font-family: var(--mono); font-size: 9px; letter-spacing: .07em; }
.frame-foot { border-top: 1px solid var(--line); border-bottom: 0; }
.frame-foot b { color: var(--success); font-weight: 400; }
.live { display: inline-flex; align-items: center; gap: 7px; color: var(--success); }
.live i { width: 5px; height: 5px; border-radius: 50%; background: currentColor; box-shadow: 0 0 14px currentColor; animation: blink 1.8s infinite; }
.topology { width: 100%; aspect-ratio: 760/650; }
.grid-lines path { fill: none; stroke: #526a75; stroke-width: .7; }
.links path { fill: none; stroke: url(#lineFade); stroke-width: 1.15; opacity: .65; }
.links .pulse-line { stroke: var(--accent); stroke-width: 2; stroke-dasharray: 8 140; stroke-dashoffset: 148; opacity: .9; animation: signal 5s linear infinite; }
.links .delay-1 { animation-delay: -.7s; }.links .delay-2 { animation-delay: -1.4s; }.links .delay-3 { animation-delay: -2.1s; }.links .delay-4 { animation-delay: -2.8s; }.links .delay-5 { animation-delay: -3.5s; }
.core-ring { fill: none; stroke: rgba(98,216,242,.28); stroke-width: 1; }
.core-ring.outer { stroke-dasharray: 6 9; animation: rotate 18s linear infinite; transform-origin: center; }
.core-ring.inner { stroke-dasharray: 2 5; animation: rotateReverse 12s linear infinite; transform-origin: center; }
.core-fill { fill: rgba(97,216,242,.13); stroke: var(--accent); stroke-width: 1.2; }
.core-title { fill: var(--ink); font-family: var(--sans); font-weight: 700; font-size: 19px; letter-spacing: .12em; }
.core-sub { fill: var(--accent); font-family: var(--mono); font-size: 6.5px; letter-spacing: .12em; }
.node rect { fill: rgba(6,16,22,.91); stroke: rgba(146,181,194,.35); stroke-width: 1; }
.node circle { fill: var(--accent); filter: drop-shadow(0 0 6px rgba(97,216,242,.8)); animation: blink 2.6s infinite; }
.node .n-id { fill: var(--accent); font-family: var(--mono); font-size: 8px; }
.node .n-label { fill: var(--ink); font-family: var(--mono); font-size: 9px; letter-spacing: .04em; }
.hero-strip { position: absolute; left: 50%; bottom: 0; width: 100vw; transform: translateX(-50%); overflow: hidden; border-block: 1px solid var(--line); background: rgba(8,20,27,.7); }
.strip-track { display: flex; width: max-content; align-items: center; gap: 34px; padding: 16px 0; color: rgba(238,244,246,.52); font-family: var(--mono); font-size: 10px; letter-spacing: .13em; animation: marquee 34s linear infinite; }
.strip-track i { color: var(--accent); font-style: normal; opacity: .65; }

.section-label { margin: 0 0 25px; color: var(--accent); font-family: var(--mono); font-size: 10px; letter-spacing: .1em; text-transform: uppercase; }
h2 { font-size: clamp(50px, 6.2vw, 92px); }
.manifesto { display: grid; grid-template-columns: 1.1fr .9fr; column-gap: clamp(60px, 10vw, 150px); }
.manifesto-body { padding-top: 56px; }
.manifesto-body p { margin: 0 0 24px; color: var(--soft); font-size: clamp(18px, 1.7vw, 24px); line-height: 1.5; letter-spacing: -.015em; }
.system-ledger { grid-column: 1 / -1; display: grid; grid-template-columns: repeat(4, 1fr); margin-top: 90px; border-top: 1px solid var(--line-strong); border-bottom: 1px solid var(--line); }
.system-ledger article { position: relative; min-height: 210px; padding: 28px 30px 30px 0; border-right: 1px solid var(--line); }
.system-ledger article:not(:first-child) { padding-left: 30px; }
.system-ledger article:last-child { border-right: 0; }
.system-ledger span, .cap-top i { color: var(--muted); font-family: var(--mono); font-size: 9px; font-style: normal; letter-spacing: .08em; }
.system-ledger strong { display: block; margin-top: 56px; font-size: 22px; font-weight: 500; letter-spacing: -.025em; }
.system-ledger p { max-width: 220px; margin: 10px 0 0; color: var(--muted); font-size: 14px; }

.capabilities { position: relative; background: #e9eef0; color: #0a171e; }
.capabilities::before { content: ""; position: absolute; inset: 0; background-image: linear-gradient(rgba(9,37,48,.05) 1px, transparent 1px), linear-gradient(90deg, rgba(9,37,48,.05) 1px, transparent 1px); background-size: 64px 64px; }
.capabilities .shell { position: relative; }
.section-intro { display: grid; grid-template-columns: 1fr .6fr; gap: 60px; align-items: end; margin-bottom: 70px; }
.section-intro .section-label { grid-column: 1 / -1; margin-bottom: -20px; color: #297d92; }
.section-intro h2 { font-size: clamp(48px, 5.4vw, 78px); }
.section-intro h2 em { color: #1f849b; }
.section-intro > p:last-child { color: #425760; font-size: 17px; }
.capability-grid { display: grid; grid-template-columns: repeat(3, 1fr); border-top: 1px solid rgba(14,44,56,.18); border-left: 1px solid rgba(14,44,56,.18); }
.capability { min-height: 420px; display: flex; flex-direction: column; padding: 26px 28px 30px; border-right: 1px solid rgba(14,44,56,.18); border-bottom: 1px solid rgba(14,44,56,.18); background: rgba(255,255,255,.28); transition: background .3s, transform .3s; }
.capability:hover { background: rgba(255,255,255,.75); transform: translateY(-5px); }
.cap-top { display: flex; justify-content: space-between; align-items: center; }
.cap-top span { color: #187e96; font-family: var(--mono); font-size: 10px; }
.cap-top i { color: #6d7f86; }
.capability h3 { margin-top: 78px; font-size: clamp(27px, 2.1vw, 35px); line-height: 1.04; }
.capability > p { margin: 22px 0 0; color: #41565e; font-size: 15px; line-height: 1.62; }
.capability ul { margin: auto 0 0; padding: 30px 0 0; list-style: none; }
.capability li { position: relative; padding: 9px 0 9px 17px; border-top: 1px solid rgba(14,44,56,.11); color: #55686f; font-family: var(--mono); font-size: 10px; letter-spacing: .02em; text-transform: uppercase; }
.capability li::before { content: "+"; position: absolute; left: 0; color: #218da5; }

.principles { display: grid; grid-template-columns: 1.02fr .98fr; gap: clamp(70px, 10vw, 150px); align-items: center; }
.scan-board { border: 1px solid var(--line-strong); background: rgba(10,24,32,.7); }
.scan-head, .scan-foot { min-height: 44px; display: flex; justify-content: space-between; align-items: center; padding: 0 16px; color: var(--muted); font-family: var(--mono); font-size: 8px; letter-spacing: .08em; border-bottom: 1px solid var(--line); }
.scan-foot { border-top: 1px solid var(--line); border-bottom: 0; }
.scan-grid { position: relative; aspect-ratio: 1.02; overflow: hidden; background-image: linear-gradient(rgba(125,167,181,.07) 1px, transparent 1px), linear-gradient(90deg, rgba(125,167,181,.07) 1px, transparent 1px); background-size: 40px 40px; }
.scan-grid::before, .scan-grid::after { content: ""; position: absolute; inset: 11%; border: 1px solid rgba(97,216,242,.13); }
.scan-grid::after { inset: 24%; border-style: dashed; }
.axis { position: absolute; background: rgba(97,216,242,.22); }
.axis-x { left: 5%; right: 5%; top: 50%; height: 1px; }
.axis-y { top: 5%; bottom: 5%; left: 50%; width: 1px; }
.focus-block { position: absolute; left: 50%; top: 50%; width: 42%; aspect-ratio: 1.3; transform: translate(-50%,-50%); display: flex; flex-direction: column; justify-content: center; padding: 26px; border: 1px solid var(--accent); background: rgba(8,22,29,.92); box-shadow: 0 0 60px rgba(97,216,242,.08); }
.focus-block span, .focus-block em { color: var(--muted); font-family: var(--mono); font-size: 8px; font-style: normal; letter-spacing: .1em; }
.focus-block strong { margin: 8px 0 26px; font-size: clamp(23px, 2.5vw, 38px); letter-spacing: -.04em; }
.focus-block em { color: var(--accent); }
.measure { position: absolute; color: var(--muted); font-family: var(--mono); font-size: 7px; letter-spacing: .06em; }
.measure i { display: inline-block; width: 44px; height: 1px; margin-right: 8px; background: var(--line-strong); vertical-align: middle; }
.m1 { left: 5%; top: 17%; }.m2 { right: 4%; top: 29%; }.m3 { left: 6%; bottom: 15%; }
.principles-copy > p:not(.section-label) { max-width: 590px; margin: 28px 0 0; color: var(--soft); font-size: 18px; }
.principle-list { margin: 52px 0 0; padding: 0; list-style: none; }
.principle-list li { display: grid; grid-template-columns: 52px 1fr; gap: 14px; padding: 22px 0; border-top: 1px solid var(--line); }
.principle-list li:last-child { border-bottom: 1px solid var(--line); }
.principle-list li > span { color: var(--accent); font-family: var(--mono); font-size: 10px; padding-top: 4px; }
.principle-list strong { font-size: 18px; font-weight: 500; }
.principle-list p { margin: 7px 0 0; color: var(--muted); font-size: 14px; }

.workflow { background: var(--panel); border-block: 1px solid var(--line); }
.workflow-head { display: flex; justify-content: space-between; gap: 50px; align-items: end; }
.workflow-head h2 { font-size: clamp(48px, 5.4vw, 79px); }
.workflow-track { display: grid; grid-template-columns: repeat(4, 1fr); margin-top: 70px; border: 1px solid var(--line); }
.workflow-step { position: relative; min-height: 160px; padding: 24px; text-align: left; border: 0; border-right: 1px solid var(--line); color: var(--ink); background: transparent; cursor: pointer; }
.workflow-step:last-child { border-right: 0; }
.workflow-step::after { content: ""; position: absolute; left: 0; right: 100%; bottom: 0; height: 2px; background: var(--accent); transition: right .35s; }
.workflow-step:hover, .workflow-step.is-active { background: rgba(97,216,242,.04); }
.workflow-step.is-active::after { right: 0; }
.workflow-step span { color: var(--accent); font-family: var(--mono); font-size: 9px; }
.workflow-step strong { display: block; margin-top: 50px; font-size: 20px; font-weight: 500; }
.workflow-step small { display: block; margin-top: 4px; color: var(--muted); font-family: var(--mono); font-size: 9px; text-transform: uppercase; letter-spacing: .05em; }
.workflow-panel { display: grid; grid-template-columns: 1.1fr .9fr; gap: 80px; min-height: 330px; padding: 55px; border: 1px solid var(--line); border-top: 0; background: rgba(4,13,18,.28); }
.panel-code { margin: 0 0 20px; color: var(--accent); font-family: var(--mono); font-size: 9px; letter-spacing: .08em; }
.workflow-panel h3 { max-width: 630px; font-size: clamp(34px, 3.7vw, 56px); }
.workflow-panel div > p:last-child { max-width: 670px; margin: 28px 0 0; color: var(--soft); font-size: 16px; }
.workflow-panel dl { margin: 0; }
.workflow-panel dl div { display: grid; grid-template-columns: 100px 1fr; gap: 20px; padding: 20px 0; border-top: 1px solid var(--line); }
.workflow-panel dl div:last-child { border-bottom: 1px solid var(--line); }
.workflow-panel dt { color: var(--muted); font-family: var(--mono); font-size: 9px; }
.workflow-panel dd { margin: 0; font-size: 14px; }

.stack { display: grid; grid-template-columns: .78fr 1.22fr; gap: clamp(70px, 10vw, 150px); align-items: start; }
.stack-copy h2 { font-size: clamp(44px, 4.7vw, 70px); }
.stack-copy > p:last-child { margin-top: 28px; color: var(--soft); font-size: 17px; }
.stack-grid { display: grid; grid-template-columns: repeat(3, 1fr); border-top: 1px solid var(--line); border-left: 1px solid var(--line); }
.stack-grid span { min-height: 100px; display: grid; place-items: center; border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); color: var(--muted); font-family: var(--mono); font-size: 10px; letter-spacing: .08em; transition: color .2s, background .2s; }
.stack-grid span:hover { color: var(--accent); background: var(--accent-soft); }

.cta { padding-top: 40px; }
.cta-inner { position: relative; overflow: hidden; padding: clamp(50px, 8vw, 110px); border: 1px solid var(--line-strong); background: linear-gradient(135deg, #0d2029, #08151c 70%); }
.cta-inner::before { content: ""; position: absolute; width: 620px; height: 620px; right: -210px; top: -270px; border: 1px solid rgba(97,216,242,.14); border-radius: 50%; box-shadow: 0 0 0 70px rgba(97,216,242,.025), 0 0 0 140px rgba(97,216,242,.018); }
.cta-inner::after { content: "+"; position: absolute; right: 56px; bottom: 38px; color: var(--accent); font-family: var(--mono); font-size: 48px; font-weight: 200; opacity: .5; }
.cta h2 { position: relative; max-width: 980px; font-size: clamp(50px, 6.7vw, 97px); }
.cta > div > p:not(.section-label) { position: relative; max-width: 760px; margin: 32px 0 0; color: var(--soft); font-size: 18px; }
.cta-actions { position: relative; display: flex; flex-wrap: wrap; gap: 10px; margin-top: 42px; }
.cta-meta { position: relative; display: flex; gap: 0; margin-top: 70px; border-top: 1px solid var(--line); }
.cta-meta span { padding: 16px 28px 0 0; margin-right: 28px; border-right: 1px solid var(--line); color: var(--muted); font-family: var(--mono); font-size: 9px; letter-spacing: .06em; text-transform: uppercase; }

.footer { margin-top: 80px; border-top: 1px solid var(--line); background: #050d12; }
.footer-main { display: grid; grid-template-columns: .85fr 1.15fr; gap: 80px; padding-block: 70px; }
.footer-brand p { margin: 26px 0 0; color: var(--muted); font-size: 14px; }
.footer-links { display: grid; grid-template-columns: repeat(3, 1fr); gap: 35px; }
.footer-links div { display: flex; flex-direction: column; gap: 9px; }
.footer-links strong { margin-bottom: 10px; color: var(--muted); font-family: var(--mono); font-size: 9px; letter-spacing: .08em; text-transform: uppercase; }
.footer-links a { color: var(--soft); font-size: 13px; }
.footer-links a:hover { color: var(--accent); }
.footer-bottom { min-height: 55px; display: flex; align-items: center; justify-content: space-between; border-top: 1px solid var(--line); color: #62737c; font-family: var(--mono); font-size: 8px; letter-spacing: .07em; }

.reveal { opacity: 0; transform: translateY(24px); transition: opacity .8s cubic-bezier(.2,.7,.2,1), transform .8s cubic-bezier(.2,.7,.2,1); }
.reveal.is-visible { opacity: 1; transform: translateY(0); }

@keyframes signal { to { stroke-dashoffset: -148; } }
@keyframes rotate { to { transform: rotate(360deg); } }
@keyframes rotateReverse { to { transform: rotate(-360deg); } }
@keyframes blink { 0%,100% { opacity: .35; } 50% { opacity: 1; } }
@keyframes marquee { to { transform: translateX(-50%); } }

@media (max-width: 1080px) {
  :root { --shell: min(100% - 36px, 920px); }
  .hero { min-height: auto; grid-template-columns: 1fr; padding-bottom: 110px; }
  .hero::before { display: none; }
  .hero-copy { padding-top: 20px; }
  .hero-system { width: min(100%, 780px); margin-inline: auto; }
  .manifesto { grid-template-columns: 1fr; }
  .manifesto-body { max-width: 730px; padding-top: 45px; }
  .system-ledger { grid-template-columns: repeat(2, 1fr); }
  .system-ledger article:nth-child(2) { border-right: 0; }
  .system-ledger article:nth-child(-n+2) { border-bottom: 1px solid var(--line); }
  .capability-grid { grid-template-columns: repeat(2, 1fr); }
  .section-intro { grid-template-columns: 1fr; }
  .section-intro .section-label { margin-bottom: 0; }
  .principles { grid-template-columns: 1fr; }
  .principles-visual { width: min(100%, 700px); margin-inline: auto; }
  .workflow-panel { grid-template-columns: 1fr; gap: 45px; }
  .stack { grid-template-columns: 1fr; }
  .stack-copy { max-width: 780px; }
}

@media (max-width: 780px) {
  :root { --shell: calc(100% - 28px); --header: 68px; }
  .section { padding-block: 88px; }
  .site-header { background: rgba(7,17,24,.84); backdrop-filter: blur(18px); border-bottom-color: var(--line); }
  .nav-toggle { display: block; position: relative; z-index: 3; }
  .nav { position: fixed; inset: var(--header) 0 auto; min-height: calc(100vh - var(--header)); display: flex; flex-direction: column; align-items: stretch; gap: 0; padding: 30px 18px; background: rgba(7,17,24,.98); transform: translateX(100%); transition: transform .35s; }
  .nav.is-open { transform: translateX(0); }
  .nav > a { padding: 22px 10px; border-bottom: 1px solid var(--line); font-size: 12px; }
  .nav .nav-cta { margin: 18px 0 0; text-align: center; }
  .hero { padding-top: calc(var(--header) + 60px); gap: 70px; }
  h1 { font-size: clamp(54px, 15.6vw, 82px); }
  .kicker { flex-direction: column; align-items: flex-start; gap: 8px; }
  .kicker i::before { display: none; }
  .hero-actions { flex-direction: column; align-items: stretch; }
  .button { justify-content: space-between; }
  .hero-index { grid-template-columns: repeat(2, 1fr); }
  .hero-index div:nth-child(2) { border-right: 0; }
  .hero-index div:nth-child(-n+2) { padding-bottom: 14px; border-bottom: 1px solid var(--line); }
  .hero-index div:nth-child(3), .hero-index div:nth-child(4) { padding-top: 14px; }
  .system-frame::before { inset: 8px; }
  .frame-head, .frame-foot { font-size: 7px; }
  .manifesto-body { padding-top: 36px; }
  .system-ledger { margin-top: 60px; grid-template-columns: 1fr; }
  .system-ledger article, .system-ledger article:not(:first-child) { min-height: auto; padding: 25px 0; border-right: 0; border-bottom: 1px solid var(--line); }
  .system-ledger article:nth-child(-n+2) { border-bottom: 1px solid var(--line); }
  .system-ledger strong { margin-top: 26px; }
  .capability-grid { grid-template-columns: 1fr; }
  .capability { min-height: 390px; }
  .capability h3 { margin-top: 60px; }
  .measure { display: none; }
  .focus-block { width: 58%; }
  .workflow-track { grid-template-columns: 1fr 1fr; }
  .workflow-step:nth-child(2) { border-right: 0; }
  .workflow-step:nth-child(-n+2) { border-bottom: 1px solid var(--line); }
  .workflow-panel { padding: 32px 24px; }
  .stack-grid { grid-template-columns: repeat(2, 1fr); }
  .cta-inner { padding: 52px 24px; }
  .cta-inner::after { display: none; }
  .cta-meta { flex-direction: column; }
  .cta-meta span { margin: 0; padding: 12px 0; border-right: 0; border-bottom: 1px solid var(--line); }
  .footer-main { grid-template-columns: 1fr; }
  .footer-links { grid-template-columns: 1fr 1fr; }
  .footer-bottom { align-items: flex-start; flex-direction: column; justify-content: center; gap: 7px; }
}

@media (max-width: 480px) {
  .brand-type strong { font-size: 13px; }
  .hero { padding-bottom: 100px; }
  .hero-lede { font-size: 17px; }
  .frame-head span:first-child, .frame-foot span:last-child { display: none; }
  .workflow-track { grid-template-columns: 1fr; }
  .workflow-step { border-right: 0; border-bottom: 1px solid var(--line); }
  .workflow-step:nth-child(2) { border-right: 0; }
  .footer-links { grid-template-columns: 1fr; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: .001ms !important; animation-iteration-count: 1 !important; transition-duration: .001ms !important; }
  .reveal { opacity: 1; transform: none; }
}


/* v1.2 — mathematical scroll field, safe marquee flow, AI support shell */
.math-background {
  position: fixed;
  inset: 0;
  z-index: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  opacity: .72;
  mask-image: linear-gradient(to bottom, rgba(0,0,0,.9), #000 72%, rgba(0,0,0,.35));
}
main, .footer { position: relative; z-index: 1; }

/* The conveyor belt now owns a grid row and can no longer cover hero copy. */
.hero { min-height: auto; padding-bottom: 0; }
.hero-strip {
  position: relative;
  grid-column: 1 / -1;
  left: auto;
  bottom: auto;
  width: 100vw;
  margin-left: calc(50% - 50vw);
  transform: none;
  z-index: 2;
  backdrop-filter: blur(14px);
}

.ai-chat {
  position: fixed;
  right: clamp(16px, 2.2vw, 32px);
  bottom: clamp(16px, 2.2vw, 32px);
  z-index: 85;
  display: grid;
  justify-items: end;
  opacity: 1;
  transform: translateY(0);
  transition: opacity .12s linear, transform .12s linear;
}
.ai-chat.is-footer-hidden { pointer-events: none; }
.ai-chat-launcher {
  min-height: 50px;
  display: inline-flex;
  align-items: center;
  gap: 12px;
  padding: 0 16px 0 12px;
  border: 1px solid rgba(159,190,202,.38);
  color: var(--ink);
  background: rgba(7,17,24,.9);
  box-shadow: 0 16px 50px rgba(0,0,0,.34);
  backdrop-filter: blur(18px);
  cursor: pointer;
  font-family: var(--mono);
  font-size: 9px;
  letter-spacing: .09em;
}
.ai-chat-launcher:hover { border-color: var(--accent); color: var(--accent); }
.ai-chat-icon {
  position: relative;
  width: 28px;
  height: 28px;
  display: grid;
  place-items: center;
  border: 1px solid rgba(97,216,242,.34);
}
.ai-chat-icon::before,
.ai-chat-icon::after,
.ai-chat-icon i { content: ""; position: absolute; background: var(--accent); }
.ai-chat-icon::before { width: 12px; height: 1px; }
.ai-chat-icon::after { width: 1px; height: 12px; }
.ai-chat-icon i { width: 3px; height: 3px; opacity: .75; }
.ai-chat-icon i:nth-child(1) { left: 4px; top: 4px; }
.ai-chat-icon i:nth-child(2) { right: 4px; top: 4px; }
.ai-chat-icon i:nth-child(3) { right: 4px; bottom: 4px; }
.ai-chat-panel {
  position: absolute;
  right: 0;
  bottom: 62px;
  width: min(360px, calc(100vw - 32px));
  height: min(470px, calc(100vh - 120px));
  display: grid;
  grid-template-rows: auto 1fr auto auto;
  border: 1px solid rgba(159,190,202,.34);
  background: rgba(7,17,24,.965);
  box-shadow: 0 30px 90px rgba(0,0,0,.5);
  backdrop-filter: blur(22px);
  opacity: 0;
  visibility: hidden;
  transform: translateY(14px) scale(.985);
  transform-origin: bottom right;
  transition: opacity .24s, visibility .24s, transform .24s cubic-bezier(.2,.7,.2,1);
  pointer-events: none;
}
.ai-chat.is-open .ai-chat-panel {
  opacity: 1;
  visibility: visible;
  transform: translateY(0) scale(1);
  pointer-events: auto;
}
.ai-chat-head {
  min-height: 72px;
  display: grid;
  grid-template-columns: 1fr auto auto;
  gap: 14px;
  align-items: center;
  padding: 0 16px;
  border-bottom: 1px solid var(--line);
}
.ai-chat-head div { display: flex; flex-direction: column; gap: 4px; }
.ai-chat-head div span,
.ai-chat-note { color: var(--muted); font-family: var(--mono); font-size: 8px; letter-spacing: .08em; text-transform: uppercase; }
.ai-chat-head strong { font-size: 15px; font-weight: 500; letter-spacing: -.02em; }
.ai-chat-status { display: inline-flex; align-items: center; gap: 7px; color: var(--success); font-family: var(--mono); font-size: 8px; letter-spacing: .08em; }
.ai-chat-status i { width: 5px; height: 5px; border-radius: 50%; background: currentColor; box-shadow: 0 0 12px currentColor; }
.ai-chat-close { width: 30px; height: 30px; padding: 0; border: 1px solid var(--line); color: var(--muted); background: transparent; cursor: pointer; }
.ai-chat-close:hover { color: var(--ink); border-color: var(--line-strong); }
.ai-chat-log {
  position: relative;
  min-height: 0;
  overflow: auto;
  background-image:
    linear-gradient(rgba(130,170,185,.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(130,170,185,.035) 1px, transparent 1px);
  background-size: 32px 32px;
}
.ai-chat-log::before,
.ai-chat-log::after { content: ""; position: absolute; left: 50%; top: 50%; background: rgba(97,216,242,.1); transform: translate(-50%,-50%); }
.ai-chat-log::before { width: 54px; height: 1px; }
.ai-chat-log::after { width: 1px; height: 54px; }
.ai-chat-form { display: grid; grid-template-columns: 1fr 46px; margin: 0 12px; border: 1px solid var(--line-strong); }
.ai-chat-form input { min-width: 0; height: 48px; padding: 0 14px; border: 0; outline: 0; color: var(--ink); background: rgba(255,255,255,.018); font-size: 13px; }
.ai-chat-form input::placeholder { color: #61737d; }
.ai-chat-form input:focus { box-shadow: inset 0 0 0 1px var(--accent); }
.ai-chat-form button { border: 0; border-left: 1px solid var(--line-strong); color: #041118; background: var(--accent); cursor: pointer; }
.ai-chat-note { min-height: 36px; margin: 0; display: flex; align-items: center; padding: 0 13px; }

@media (max-width: 1080px) {
  .hero { padding-bottom: 0; }
}
@media (max-width: 780px) {
  .math-background { opacity: .55; }
  .ai-chat { right: 14px; bottom: 14px; }
  .ai-chat-panel { width: min(360px, calc(100vw - 28px)); height: min(450px, calc(100vh - 100px)); }
}
@media (max-width: 480px) {
  .hero { padding-bottom: 0; }
  .ai-chat-launcher { min-height: 46px; padding-right: 12px; }
  .ai-chat-launcher > span:last-child { display: none; }
}
@media (prefers-reduced-motion: reduce) {
  .math-background { opacity: .5; }
}


/* v1.4 — design control console */
.control-console {
  --control-x: 50%;
  --control-y: 50%;
  --control-tilt: -1deg;
  overflow: hidden;
  border: 1px solid var(--line-strong);
  background: linear-gradient(145deg, rgba(14,31,40,.96), rgba(6,16,22,.98));
  box-shadow: 0 32px 90px rgba(0,0,0,.24), inset 0 1px rgba(255,255,255,.025);
}
.control-console-head {
  min-height: 66px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 0 20px;
  border-bottom: 1px solid var(--line);
  background: rgba(255,255,255,.012);
}
.control-console-title { display: flex; flex-direction: column; gap: 3px; }
.control-console-title span,
.control-console-state,
.control-ruler,
.control-coordinate,
.control-signal-top,
.control-score span,
.control-readout,
.control-console-foot { font-family: var(--mono); text-transform: uppercase; letter-spacing: .075em; }
.control-console-title span { color: var(--muted); font-size: 8px; }
.control-console-title strong { font-size: 15px; font-weight: 500; letter-spacing: -.025em; }
.control-console-state { display: inline-flex; align-items: center; gap: 8px; color: var(--success); font-size: 8px; }
.control-console-state i { width: 6px; height: 6px; border-radius: 50%; background: currentColor; box-shadow: 0 0 14px currentColor; animation: blink 2.2s infinite; }
.control-console-body { display: grid; grid-template-columns: minmax(0, 1fr) 164px; }
.control-canvas {
  position: relative;
  min-height: 520px;
  overflow: hidden;
  isolation: isolate;
  background:
    radial-gradient(circle at var(--control-x) var(--control-y), rgba(97,216,242,.08), transparent 23%),
    linear-gradient(180deg, rgba(255,255,255,.006), transparent 35%);
}
.control-grid-field {
  position: absolute;
  inset: 26px 24px 24px 38px;
  opacity: .92;
  background-image:
    linear-gradient(rgba(129,177,191,.085) 1px, transparent 1px),
    linear-gradient(90deg, rgba(129,177,191,.085) 1px, transparent 1px),
    linear-gradient(rgba(97,216,242,.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(97,216,242,.035) 1px, transparent 1px);
  background-size: 48px 48px, 48px 48px, 12px 12px, 12px 12px;
  mask-image: linear-gradient(145deg, rgba(0,0,0,.96), rgba(0,0,0,.35));
}
.control-grid-field::before,
.control-grid-field::after { content: ""; position: absolute; pointer-events: none; }
.control-grid-field::before { inset: 9%; border: 1px solid rgba(97,216,242,.14); clip-path: polygon(0 0, 32% 0, 32% 1px, 100% 1px, 100% 70%, calc(100% - 1px) 70%, calc(100% - 1px) 100%, 66% 100%, 66% calc(100% - 1px), 0 calc(100% - 1px)); }
.control-grid-field::after { inset: 21%; border: 1px dashed rgba(160,194,205,.14); transform: rotate(var(--control-tilt)); transition: transform .55s cubic-bezier(.2,.7,.2,1); }
.control-ruler { position: absolute; z-index: 4; display: flex; color: #637984; font-size: 7px; pointer-events: none; }
.control-ruler-top { top: 8px; left: 42px; right: 24px; justify-content: space-between; }
.control-ruler-side { top: 38px; bottom: 26px; left: 10px; flex-direction: column; justify-content: space-between; }
.control-axis { position: absolute; z-index: 2; background: linear-gradient(90deg, transparent, rgba(97,216,242,.34), transparent); transition: top .55s, left .55s, transform .55s; }
.control-axis-x { left: 7%; right: 4%; top: var(--control-y); height: 1px; }
.control-axis-y { top: 5%; bottom: 5%; left: var(--control-x); width: 1px; background: linear-gradient(transparent, rgba(97,216,242,.34), transparent); }
.control-axis-x::after,
.control-axis-y::after { content: ""; position: absolute; background: var(--accent); box-shadow: 0 0 16px rgba(97,216,242,.75); }
.control-axis-x::after { right: 12%; top: -2px; width: 5px; height: 5px; }
.control-axis-y::after { left: -2px; top: 18%; width: 5px; height: 5px; }
.control-orbit { position: absolute; z-index: 1; left: var(--control-x); top: var(--control-y); border: 1px solid rgba(97,216,242,.15); border-radius: 50%; transform: translate(-50%,-50%) rotate(var(--control-tilt)); transition: left .55s, top .55s, transform .55s; }
.control-orbit-a { width: 66%; aspect-ratio: 1; clip-path: inset(0 0 45% 0); }
.control-orbit-b { width: 42%; aspect-ratio: 1; border-style: dashed; opacity: .7; clip-path: inset(42% 0 0 0); }
.control-vector { position: absolute; z-index: 3; height: 1px; width: 28%; background: linear-gradient(90deg, rgba(97,216,242,.05), rgba(97,216,242,.42), transparent); transform-origin: left center; transition: left .55s, top .55s, transform .55s; }
.control-vector::after { content: ""; position: absolute; right: 0; top: -3px; width: 7px; height: 7px; border-top: 1px solid var(--accent); border-right: 1px solid var(--accent); transform: rotate(45deg); }
.control-vector-a { left: 14%; top: 27%; transform: rotate(22deg); }
.control-vector-b { left: 64%; top: 70%; transform: rotate(202deg); }
.control-node { position: absolute; z-index: 5; width: 7px; height: 7px; border: 1px solid var(--accent); background: #0a1820; box-shadow: 0 0 18px rgba(97,216,242,.35); transition: left .55s, top .55s; }
.control-node::before { content: ""; position: absolute; inset: -6px; border: 1px solid rgba(97,216,242,.11); }
.control-node-a { left: 17%; top: 25%; }
.control-node-b { left: 79%; top: 31%; }
.control-node-c { left: 69%; top: 77%; }
.control-signal-card {
  position: absolute;
  z-index: 6;
  left: var(--control-x);
  top: var(--control-y);
  width: min(310px, 56%);
  min-height: 236px;
  display: flex;
  flex-direction: column;
  padding: 24px;
  transform: translate(-50%,-50%) rotate(var(--control-tilt));
  border: 1px solid rgba(97,216,242,.66);
  background: rgba(7,19,26,.93);
  box-shadow: 0 25px 65px rgba(0,0,0,.32), 0 0 70px rgba(97,216,242,.055);
  backdrop-filter: blur(12px);
  transition: left .55s cubic-bezier(.2,.7,.2,1), top .55s cubic-bezier(.2,.7,.2,1), transform .55s cubic-bezier(.2,.7,.2,1);
}
.control-signal-card::before,
.control-signal-card::after { content: ""; position: absolute; width: 18px; height: 18px; pointer-events: none; }
.control-signal-card::before { left: -1px; top: -1px; border-left: 2px solid var(--accent); border-top: 2px solid var(--accent); }
.control-signal-card::after { right: -1px; bottom: -1px; border-right: 2px solid var(--accent); border-bottom: 2px solid var(--accent); }
.control-signal-top { display: flex; justify-content: space-between; gap: 12px; color: var(--muted); font-size: 7px; }
.control-signal-top b { color: var(--accent); font-weight: 400; }
.control-signal-card > strong { margin-top: 42px; font-size: clamp(26px, 2.5vw, 38px); line-height: 1; letter-spacing: -.05em; font-weight: 500; }
.control-signal-card > p { margin: 16px 0 26px; color: var(--soft); font-size: 13px; line-height: 1.55; }
.control-score { margin-top: auto; display: flex; justify-content: space-between; align-items: end; padding-top: 14px; border-top: 1px solid var(--line); }
.control-score span { color: var(--muted); font-size: 7px; }
.control-score b { color: var(--accent); font-family: var(--mono); font-size: 15px; font-weight: 400; }
.control-coordinate { position: absolute; z-index: 5; right: 18px; bottom: 15px; color: #607681; font-size: 7px; }
.control-readouts { border-left: 1px solid var(--line); }
.control-readout {
  width: 100%;
  min-height: 130px;
  display: grid;
  grid-template-columns: 26px minmax(0, 1fr);
  grid-template-rows: auto auto auto;
  gap: 6px 10px;
  align-content: center;
  padding: 16px 14px;
  border: 0;
  border-bottom: 1px solid var(--line);
  color: var(--muted);
  background: transparent;
  text-align: left;
  cursor: pointer;
  transition: color .25s, background .25s;
}
.control-readout:last-child { border-bottom: 0; }
.control-readout:hover,
.control-readout.is-active { color: var(--ink); background: rgba(97,216,242,.055); }
.control-readout span { grid-row: 1 / 4; color: #4f6873; font-size: 8px; }
.control-readout strong { min-width: 0; overflow-wrap: anywhere; font-size: 8px; line-height: 1.25; font-weight: 500; }
.control-readout i { height: 2px; overflow: hidden; background: rgba(151,185,197,.12); }
.control-readout i b { display: block; width: var(--value); height: 100%; background: var(--accent); transform-origin: left; transform: scaleX(.25); opacity: .45; transition: transform .5s, opacity .3s; }
.control-readout.is-active i b { transform: scaleX(1); opacity: 1; }
.control-readout em { color: #627781; font-size: 7px; line-height: 1.2; font-style: normal; }
.control-console-foot { min-height: 70px; border-top: 1px solid var(--line); }
.control-console-foot dl { height: 100%; margin: 0; display: grid; grid-template-columns: repeat(4, 1fr); }
.control-console-foot dl div { display: flex; flex-direction: column; justify-content: center; gap: 4px; padding: 0 18px; border-right: 1px solid var(--line); }
.control-console-foot dl div:last-child { border-right: 0; }
.control-console-foot dt { color: #5c717c; font-size: 7px; }
.control-console-foot dd { margin: 0; color: var(--soft); font-size: 10px; }
.footer-links span { color: var(--soft); font-size: 13px; }

/* Legal pages */
.legal-page { min-height: 100vh; }
.legal-page .site-header { background: rgba(7,17,24,.9); border-bottom-color: var(--line); backdrop-filter: blur(18px); }
.legal-shell { width: min(940px, calc(100vw - 48px)); margin-inline: auto; padding: calc(var(--header) + 78px) 0 130px; }
.legal-shell h1 { max-width: 820px; font-size: clamp(54px, 8vw, 98px); }
.legal-intro { max-width: 740px; margin: 28px 0 56px; color: var(--soft); font-size: 18px; }
.legal-meta { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 32px; }
.legal-meta span { padding: 8px 10px; border: 1px solid var(--line); color: var(--muted); font-family: var(--mono); font-size: 8px; letter-spacing: .07em; text-transform: uppercase; }
.legal-block { padding: 34px 0; border-top: 1px solid var(--line); }
.legal-block:last-of-type { border-bottom: 1px solid var(--line); }
.legal-block h2 { margin: 0 0 18px; font-size: clamp(25px, 3vw, 34px); letter-spacing: -.035em; }
.legal-block h3 { margin: 28px 0 10px; font-size: 18px; letter-spacing: -.02em; }
.legal-block p,
.legal-block li { color: var(--soft); }
.legal-block p { margin: 0 0 14px; }
.legal-block ul { margin: 14px 0; padding-left: 20px; }
.legal-block a { color: var(--accent); }
.legal-block code { color: var(--accent); font-family: var(--mono); font-size: .92em; }
.legal-provider { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
.legal-provider > div { padding: 24px; border: 1px solid var(--line); background: rgba(255,255,255,.012); }
.legal-provider span { display: block; margin-bottom: 12px; color: var(--muted); font-family: var(--mono); font-size: 8px; letter-spacing: .08em; text-transform: uppercase; }
.legal-provider strong { font-size: 18px; font-weight: 500; }
.legal-note { padding: 20px 22px; border-left: 2px solid var(--accent); background: rgba(97,216,242,.055); color: var(--soft); }
.legal-home { color: var(--soft); font-family: var(--mono); font-size: 10px; letter-spacing: .08em; text-transform: uppercase; }
.legal-home:hover { color: var(--accent); }

@media (max-width: 780px) {
  .control-console-body { grid-template-columns: 1fr; }
  .control-canvas { min-height: 440px; }
  .control-readouts { display: grid; grid-template-columns: repeat(2, 1fr); border-left: 0; border-top: 1px solid var(--line); }
  .control-readout { min-height: 104px; border-right: 1px solid var(--line); }
  .control-readout:nth-child(2n) { border-right: 0; }
  .control-readout:nth-child(-n+2) { border-bottom: 1px solid var(--line); }
  .control-console-foot dl { grid-template-columns: repeat(2, 1fr); }
  .control-console-foot dl div { min-height: 58px; border-bottom: 1px solid var(--line); }
  .control-console-foot dl div:nth-child(2n) { border-right: 0; }
  .control-console-foot dl div:nth-last-child(-n+2) { border-bottom: 0; }
  .legal-shell { width: calc(100vw - 28px); padding-top: calc(var(--header) + 58px); }
  .legal-provider { grid-template-columns: 1fr; }
}
@media (max-width: 480px) {
  .control-console-head { min-height: 58px; padding-inline: 14px; }
  .control-canvas { min-height: 390px; }
  .control-signal-card { width: 68%; min-height: 216px; padding: 19px; }
  .control-signal-card > strong { margin-top: 34px; font-size: 25px; }
  .control-signal-card > p { font-size: 12px; }
  .control-readout { padding: 13px; }
  .control-console-foot dl div { padding-inline: 13px; }
}


/* v1.5 — kinetic scroll field */
:root {
  --bg-grid-x: 0px;
  --bg-grid-y: 0px;
  --bg-grid-tilt: 0deg;
  --bg-grid-scale: 1.04;
}
body::after {
  inset: -7%;
  transform: translate3d(var(--bg-grid-x), var(--bg-grid-y), 0) rotate(var(--bg-grid-tilt)) scale(var(--bg-grid-scale));
  transform-origin: center;
  will-change: transform;
  mask-image: radial-gradient(circle at 50% 34%, #000 0 34%, rgba(0,0,0,.72) 58%, transparent 91%);
}
.math-background {
  opacity: .84;
  filter: saturate(1.08) contrast(1.03);
  mix-blend-mode: screen;
  will-change: contents;
  mask-image:
    linear-gradient(to bottom, rgba(0,0,0,.98), #000 68%, rgba(0,0,0,.46)),
    radial-gradient(circle at 50% 42%, #000 0 42%, rgba(0,0,0,.76) 72%, transparent 100%);
  mask-composite: intersect;
}
@media (max-width: 780px) {
  .math-background { opacity: .68; }
  body::after { inset: -10%; }
}
@media (prefers-reduced-motion: reduce) {
  body::after { transform: none; }
  .math-background { opacity: .56; }
}