/*
  Nexumo Design Brief — inspired by https://www.nexumous.ai/
  Structure: black utility nav → cinematic media hero → typography statement →
  horizontal capability rows → tabbed applications → vivid architecture band →
  editorial differentiators → high-contrast closing CTA.
  Visual language: near-black fields, sharp white type, electric signal green,
  technical hairlines, generous editorial spacing and restrained geometry.
  Layout types: media-band hero, manifesto split, metric rail, capability rows,
  tabbed solution stage, architecture map, sticky editorial list, signal CTA.
*/
:root {
  --color-bg: #f2f2ed;
  --color-bg-alt: #e7e8e2;
  --color-surface: #ffffff;
  --color-ink: #0f0f0f;
  --color-ink-soft: #252724;
  --color-text: #11130f;
  --color-text-muted: #62665e;
  --color-on-dark: #f5f6f1;
  --color-on-dark-muted: #a9aca5;
  --color-accent: #16db65;
  --color-accent-hover: #00f469;
  --color-accent-deep: #04471c;
  --color-border: #c8cbc2;
  --color-border-dark: #343631;
  --font-display: "Arial Narrow", "Helvetica Neue", Arial, sans-serif;
  --font-body: "Helvetica Neue", Arial, sans-serif;
  --radius-sm: 0;
  --radius-md: 2px;
  --radius-lg: 4px;
  --space-section: clamp(5.5rem, 11vw, 10rem);
  --container: 1280px;
  --transition-base: 300ms cubic-bezier(.2,.8,.2,1);
  --transition-reveal: 750ms cubic-bezier(.16,1,.3,1);
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; background: var(--color-bg); color: var(--color-text); font-family: var(--font-body); font-size: 16px; line-height: 1.6; -webkit-font-smoothing: antialiased; }
body.modal-open { overflow: hidden; }
img { display: block; max-width: 100%; }
button, a { font: inherit; }
button { color: inherit; }
a { color: inherit; text-decoration: none; }
.container { width: min(calc(100% - 48px), var(--container)); margin-inline: auto; }
.section { padding-block: var(--space-section); }
.section--dark { background: var(--color-ink); color: var(--color-on-dark); }
.section--acid { background: var(--color-accent); color: var(--color-ink); }
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; }
.skip-link { position: fixed; z-index: 999; left: 1rem; top: 1rem; padding: .75rem 1rem; background: var(--color-accent); color: var(--color-ink); transform: translateY(-150%); }
.skip-link:focus { transform: none; }
:focus-visible { outline: 2px solid var(--color-accent); outline-offset: 4px; }
.section--acid :focus-visible { outline-color: var(--color-ink); }

.site-header { position: fixed; z-index: 100; inset: 0 0 auto; height: 78px; border-bottom: 1px solid rgba(255,255,255,.12); color: var(--color-on-dark); transition: background var(--transition-base), height var(--transition-base); }
.site-header.is-scrolled { height: 66px; background: rgba(15,15,15,.94); backdrop-filter: blur(16px); }
.nav-shell { height: 100%; display: grid; grid-template-columns: 1fr auto 1fr; align-items: center; }
.brand { justify-self: start; }
.brand img { height: 31px; width: auto; }
.site-nav { display: flex; align-items: center; gap: 2.5rem; }
.site-nav a { position: relative; font-size: .72rem; font-weight: 700; letter-spacing: .12em; text-transform: uppercase; }
.site-nav a::after { content: ""; position: absolute; left: 0; right: 100%; bottom: -.55rem; height: 1px; background: var(--color-accent); transition: right var(--transition-base); }
.site-nav a:hover::after { right: 0; }
.nav-cta { justify-self: end; }
.menu-toggle { display: none; border: 0; background: transparent; padding: .5rem; }

.btn { border: 1px solid transparent; min-height: 52px; display: inline-flex; align-items: center; justify-content: space-between; gap: 2.5rem; padding: 0 1.25rem; cursor: pointer; text-transform: uppercase; letter-spacing: .1em; font-size: .7rem; font-weight: 800; transition: background var(--transition-base), color var(--transition-base), border-color var(--transition-base), transform var(--transition-base); }
.btn span { font-size: 1rem; }
.btn:hover { transform: translateY(-2px); }
.btn--primary { background: var(--color-accent); color: var(--color-ink); }
.btn--primary:hover { background: var(--color-accent-hover); }
.btn--outline { border-color: rgba(255,255,255,.5); color: var(--color-on-dark); background: transparent; }
.btn--outline:hover { background: var(--color-on-dark); color: var(--color-ink); }
.btn--compact { min-height: 39px; padding-inline: .9rem; gap: 1.4rem; }
.btn--ink { background: var(--color-ink); color: var(--color-on-dark); }
.btn--ink:hover { background: #252724; }
.text-link { border: 0; background: none; padding: .7rem 0; color: var(--color-on-dark); cursor: pointer; font-size: .75rem; font-weight: 800; text-transform: uppercase; letter-spacing: .1em; border-bottom: 1px solid currentColor; }
.text-link span { margin-left: 1.25rem; transition: margin var(--transition-base); }
.text-link:hover span { margin-left: 1.75rem; }
.text-link--dark { color: var(--color-ink); }
.button-row { display: flex; align-items: center; gap: 2rem; flex-wrap: wrap; }
.button-row--center { justify-content: center; }
.eyebrow, .section-index, .kicker { margin: 0 0 1.75rem; font-size: .68rem; line-height: 1.3; font-weight: 800; text-transform: uppercase; letter-spacing: .17em; }
.section-index { color: var(--color-text-muted); }
.section--dark .section-index, .cta-section .section-index { color: var(--color-on-dark-muted); }
h1, h2, h3, p { margin-top: 0; }
h1, h2, h3 { font-family: var(--font-display); letter-spacing: -.045em; line-height: .98; }
h2 { font-size: clamp(3rem, 6vw, 6.5rem); font-weight: 700; }
h2 span { color: var(--color-text-muted); }

.hero { min-height: 100svh; position: relative; display: flex; flex-direction: column; overflow: hidden; background: #0b0d0c; color: var(--color-on-dark); }
.hero__media { position: absolute; inset: 0; background: radial-gradient(circle at 50% 54%, rgba(22,219,101,.16), transparent 19%), linear-gradient(180deg, rgba(0,0,0,.2), rgba(0,0,0,.65)), #111512; }
.hero__grid { position: absolute; inset: 0; opacity: .23; background-image: linear-gradient(rgba(255,255,255,.12) 1px, transparent 1px), linear-gradient(90deg, rgba(255,255,255,.12) 1px, transparent 1px); background-size: 80px 80px; transform: perspective(700px) rotateX(61deg) scale(1.5) translateY(18%); transform-origin: bottom; }
.hero__corridor { position: absolute; top: 0; bottom: 0; width: 39%; border: 1px solid rgba(255,255,255,.11); background: repeating-linear-gradient(115deg, transparent 0 54px, rgba(255,255,255,.035) 55px 57px); }
.hero__corridor--left { left: -10%; transform: skewX(12deg); border-right-color: rgba(22,219,101,.25); }
.hero__corridor--right { right: -10%; transform: skewX(-12deg); border-left-color: rgba(22,219,101,.25); }
.signal-core { position: absolute; width: 16rem; height: 16rem; left: 50%; top: 52%; transform: translate(-50%,-50%); border: 1px solid rgba(22,219,101,.7); border-radius: 50%; box-shadow: 0 0 70px rgba(22,219,101,.1); }
.signal-core span { position: absolute; inset: 35%; border-radius: 50%; background: var(--color-accent); box-shadow: 0 0 40px var(--color-accent); }
.signal-core i { position: absolute; inset: -35%; border: 1px solid rgba(22,219,101,.15); border-radius: 50%; }
.signal-core i:nth-of-type(2) { inset: -75%; }
.signal-core i:nth-of-type(3) { inset: -115%; }
.hero__content { position: relative; z-index: 2; flex: 1; display: flex; flex-direction: column; align-items: center; justify-content: center; text-align: center; padding-top: 9rem; padding-bottom: 8rem; }
.hero .eyebrow { color: var(--color-accent); }
.hero h1 { max-width: 1100px; margin-bottom: 2rem; font-size: clamp(4rem, 8.8vw, 9.5rem); font-weight: 700; text-transform: uppercase; }
.hero h1 em { color: transparent; -webkit-text-stroke: 1px rgba(245,246,241,.75); font-style: normal; }
.hero__lede { max-width: 620px; margin-bottom: 2.5rem; color: #d2d4cf; font-size: clamp(1rem, 1.4vw, 1.2rem); }
.hero__rail { position: relative; z-index: 2; display: grid; grid-template-columns: repeat(3, 1fr); border-top: 1px solid rgba(255,255,255,.18); }
.hero__rail span { padding: 1.1rem 2rem; text-align: center; border-right: 1px solid rgba(255,255,255,.18); color: #b9bcb5; font-size: .65rem; text-transform: uppercase; letter-spacing: .14em; }

.manifesto { background: var(--color-bg); }
.manifesto__grid { display: grid; grid-template-columns: 1.25fr .55fr; gap: 12%; align-items: end; }
.manifesto h2 { margin-bottom: 0; }
.manifesto h2 span { color: var(--color-accent-deep); }
.manifesto__copy { padding-bottom: .5rem; }
.manifesto__copy .lead { color: var(--color-ink); font-size: 1.35rem; line-height: 1.45; }
.manifesto__copy p:not(.lead) { color: var(--color-text-muted); }
.metric-rail { margin-top: clamp(4rem, 8vw, 7rem); display: grid; grid-template-columns: repeat(4, 1fr); border-top: 1px solid var(--color-border); border-bottom: 1px solid var(--color-border); }
.metric-rail article { min-height: 160px; padding: 2rem 1.5rem; display: flex; flex-direction: column; justify-content: space-between; border-right: 1px solid var(--color-border); }
.metric-rail article:last-child { border: 0; }
.metric-rail strong { color: var(--color-accent-deep); font-family: var(--font-display); font-size: clamp(2.1rem, 4vw, 4rem); letter-spacing: -.06em; line-height: 1; }
.metric-rail span { color: var(--color-text-muted); font-size: .72rem; line-height: 1.35; text-transform: uppercase; letter-spacing: .08em; }

.section-heading { display: grid; grid-template-columns: .7fr 1.3fr .6fr; align-items: end; gap: 4rem; margin-bottom: 5rem; }
.section-heading .section-index { align-self: start; }
.section-heading h2 { margin: 0; }
.section-heading h2 span { color: #5b5e58; }
.section-heading > p:last-child { color: var(--color-on-dark-muted); }
.capability-stack { border-top: 1px solid var(--color-border-dark); }
.capability-row { min-height: 180px; display: grid; grid-template-columns: .25fr 1fr 1fr auto; gap: 3rem; align-items: center; border-bottom: 1px solid var(--color-border-dark); transition: background var(--transition-base), padding var(--transition-base); }
.capability-row:hover { background: #181a17; padding-inline: 1.5rem; }
.capability-row__number { align-self: start; padding-top: 2.2rem; color: #6c6f68; font-size: .7rem; }
.capability-row__title { display: flex; align-items: center; gap: 2rem; }
.capability-row h3 { margin: 0; font-size: clamp(2.3rem, 4.5vw, 5rem); font-weight: 500; }
.icon-node { width: 44px; height: 44px; display: grid; place-items: center; border: 1px solid #555950; color: var(--color-accent); }
.capability-row p { margin: 0; max-width: 430px; color: var(--color-on-dark-muted); }
.capability-row button { width: 44px; height: 44px; border: 1px solid #555950; background: transparent; color: var(--color-accent); cursor: pointer; transition: var(--transition-base); }
.capability-row button:hover { background: var(--color-accent); color: var(--color-ink); }

.solutions { background: var(--color-bg-alt); }
.solutions__heading { display: grid; grid-template-columns: .5fr 1.5fr; margin-bottom: 4rem; }
.solutions__heading h2 { margin: 0; }
.solutions__heading h2 span { color: var(--color-accent-deep); }
.solution-stage { border: 1px solid var(--color-border); }
.solution-tabs { display: grid; grid-template-columns: repeat(3,1fr); border-bottom: 1px solid var(--color-border); }
.solution-tabs button { border: 0; border-right: 1px solid var(--color-border); background: transparent; min-height: 70px; padding: 1rem 1.5rem; cursor: pointer; color: var(--color-text-muted); text-align: left; text-transform: uppercase; letter-spacing: .1em; font-size: .67rem; font-weight: 800; }
.solution-tabs button:last-child { border: 0; }
.solution-tabs button[aria-selected="true"] { color: var(--color-ink); background: var(--color-accent); }
.solution-panel { min-height: 560px; display: grid; grid-template-columns: 1.2fr .8fr; }
.solution-panel__visual { position: relative; overflow: hidden; background: #111410; border-right: 1px solid var(--color-border); }
.solution-panel__visual::before { content: ""; position: absolute; inset: 8%; border: 1px solid rgba(22,219,101,.35); background-image: linear-gradient(rgba(22,219,101,.1) 1px, transparent 1px), linear-gradient(90deg, rgba(22,219,101,.1) 1px, transparent 1px); background-size: 34px 34px; transform: perspective(500px) rotateX(62deg) scale(1.2); }
.solution-panel__visual::after { content: ""; position: absolute; width: 34%; aspect-ratio: 1; border: 1px solid var(--color-accent); border-radius: 50%; left: 33%; top: 32%; box-shadow: 0 0 0 35px rgba(22,219,101,.04), 0 0 0 85px rgba(22,219,101,.025); }
.solution-panel__visual > span { position: absolute; z-index: 2; top: 2rem; left: 2rem; color: var(--color-accent); font-family: monospace; font-size: .7rem; }
.solution-panel__visual i { position: absolute; z-index: 2; width: 9px; height: 9px; border: 2px solid var(--color-accent); border-radius: 50%; }
.solution-panel__visual i:nth-of-type(1) { left: 22%; top: 62%; }.solution-panel__visual i:nth-of-type(2) { left: 62%; top: 28%; }.solution-panel__visual i:nth-of-type(3) { left: 75%; top: 70%; }
.visual--cities::before { transform: perspective(500px) rotateX(50deg) rotateZ(20deg) scale(1.1); }
.visual--critical::after { border-radius: 0; transform: rotate(45deg); }
.solution-panel__copy { padding: clamp(2.5rem, 5vw, 5rem); display: flex; flex-direction: column; justify-content: center; }
.solution-panel__copy .kicker { color: var(--color-accent-deep); }
.solution-panel__copy h3 { margin-bottom: 2rem; font-size: clamp(2.3rem, 4vw, 4.6rem); }
.solution-panel__copy p:not(.kicker) { color: var(--color-text-muted); }
.solution-panel__copy .text-link { margin-top: 1rem; align-self: flex-start; }

.technology__grid { display: grid; grid-template-columns: .72fr 1.28fr; align-items: center; gap: 8%; }
.technology__intro h2 span { color: var(--color-accent-deep); }
.technology__intro > p:not(.section-index) { max-width: 500px; color: #174d29; margin-bottom: 2.5rem; }
.architecture-map { position: relative; min-height: 680px; display: grid; place-items: center; }
.arch-center { position: relative; z-index: 4; width: 190px; height: 190px; display: flex; flex-direction: column; align-items: center; justify-content: center; background: var(--color-ink); color: var(--color-on-dark); border-radius: 50%; box-shadow: 0 0 0 12px rgba(15,15,15,.1); }
.arch-center small, .arch-center span { font-size: .58rem; letter-spacing: .12em; text-transform: uppercase; color: var(--color-on-dark-muted); }
.arch-center strong { font-family: var(--font-display); font-size: 1.8rem; letter-spacing: .08em; color: var(--color-accent); }
.arch-orbit { position: absolute; border: 1px solid rgba(4,71,28,.42); border-radius: 50%; }
.arch-orbit::before, .arch-orbit::after { content: ""; position: absolute; width: 9px; height: 9px; border-radius: 50%; background: var(--color-ink); }
.arch-orbit::before { top: 13%; left: 16%; }.arch-orbit::after { bottom: 13%; right: 16%; }
.arch-orbit span { position: absolute; padding: .5rem .8rem; background: var(--color-accent); border: 1px solid rgba(4,71,28,.5); font-size: .62rem; text-transform: uppercase; letter-spacing: .1em; white-space: nowrap; }
.arch-orbit--one { width: 330px; height: 330px; }.arch-orbit--one span:first-child { left: 4%; top: 12%; }.arch-orbit--one span:last-child { right: 0; bottom: 17%; }
.arch-orbit--two { width: 500px; height: 500px; }.arch-orbit--two span:first-child { right: 6%; top: 15%; }.arch-orbit--two span:last-child { left: -2%; bottom: 24%; }
.arch-orbit--three { width: 650px; height: 650px; }.arch-orbit--three span:nth-child(1) { left: 10%; top: 12%; }.arch-orbit--three span:nth-child(2) { right: 2%; top: 43%; }.arch-orbit--three span:nth-child(3) { left: 22%; bottom: 3%; }

.difference { background: var(--color-bg); }
.difference__grid { display: grid; grid-template-columns: .8fr 1.2fr; gap: 10%; align-items: start; }
.difference__sticky { position: sticky; top: 120px; }
.difference h2 span { color: var(--color-accent-deep); }
.difference__list { border-top: 1px solid var(--color-border); }
.difference__list article { position: relative; min-height: 240px; padding: 3rem 2rem 3rem 6rem; border-bottom: 1px solid var(--color-border); }
.difference__list article > span { position: absolute; left: 0; top: 3rem; font-size: .7rem; color: var(--color-text-muted); }
.difference__list h3 { font-size: clamp(2rem, 3vw, 3.3rem); margin-bottom: 1.5rem; }
.difference__list p { max-width: 600px; color: var(--color-text-muted); }

.cta-section { position: relative; overflow: hidden; min-height: 720px; display: grid; place-items: center; background: var(--color-ink); color: var(--color-on-dark); text-align: center; }
.cta-section__signal { position: absolute; width: min(80vw, 900px); aspect-ratio: 1; border-radius: 50%; border: 1px solid rgba(22,219,101,.3); box-shadow: 0 0 0 100px rgba(22,219,101,.025), 0 0 0 200px rgba(22,219,101,.02), inset 0 0 130px rgba(22,219,101,.08); }
.cta-section__signal::after { content: ""; position: absolute; inset: 46%; background: var(--color-accent); border-radius: 50%; box-shadow: 0 0 80px 25px rgba(22,219,101,.35); }
.cta-section__content { position: relative; z-index: 2; padding-block: 7rem; }
.cta-section h2 { margin-bottom: 2rem; }
.cta-section h2 span { color: var(--color-accent); }
.cta-section__content > p:not(.section-index) { max-width: 620px; margin: 0 auto 2.5rem; color: var(--color-on-dark-muted); }

.site-footer { padding: 5rem 0 2rem; background: #090a09; color: var(--color-on-dark); }
.footer__top { display: grid; grid-template-columns: 1fr 1fr 1fr; align-items: end; padding-bottom: 5rem; }
.footer__top img { width: 190px; }
.footer__top p { margin: 0; color: var(--color-on-dark-muted); }
.footer-email { justify-self: end; padding-bottom: .35rem; border-bottom: 1px solid var(--color-accent); color: var(--color-accent); }
.footer__bottom { padding-top: 1.5rem; border-top: 1px solid var(--color-border-dark); display: flex; justify-content: space-between; color: #7c7f78; font-size: .65rem; letter-spacing: .07em; text-transform: uppercase; }
.footer__bottom nav { display: flex; gap: 2rem; }
.footer__bottom a:hover { color: var(--color-accent); }

.modal[hidden] { display: none; }
.modal { position: fixed; z-index: 500; inset: 0; display: grid; place-items: center; padding: 1.5rem; }
.modal__backdrop { position: absolute; inset: 0; background: rgba(0,0,0,.8); backdrop-filter: blur(8px); }
.modal__panel { position: relative; width: min(100%, 660px); padding: clamp(2.5rem, 6vw, 5rem); background: var(--color-bg); border-top: 5px solid var(--color-accent); box-shadow: 0 30px 100px rgba(0,0,0,.4); }
.modal__panel h2 { font-size: clamp(2.5rem, 5vw, 4.6rem); }
.modal__panel > p:not(.section-index) { color: var(--color-text-muted); margin-bottom: 2rem; }
.modal__close { position: absolute; right: 1.25rem; top: 1rem; border: 0; background: transparent; cursor: pointer; font-size: 2rem; line-height: 1; }

.policy-page { min-height: 100vh; background: var(--color-bg); }
.policy-header { background: var(--color-ink); height: 78px; display: flex; align-items: center; }
.policy-header .container { display: flex; align-items: center; justify-content: space-between; }
.policy-header img { width: 170px; }
.policy-header a:last-child { color: var(--color-on-dark); font-size: .7rem; text-transform: uppercase; letter-spacing: .1em; }
.policy-main { padding-block: clamp(5rem, 10vw, 9rem); }
.policy-main .section-index { color: var(--color-accent-deep); }
.policy-main h1 { max-width: 900px; margin-bottom: 4rem; font-size: clamp(3.5rem, 8vw, 8rem); text-transform: uppercase; }
.policy-copy { max-width: 760px; margin-left: auto; }
.policy-copy h2 { margin-top: 3rem; font-size: 2rem; }
.policy-copy p, .policy-copy li { color: var(--color-text-muted); }
.policy-footer { padding-block: 2rem; border-top: 1px solid var(--color-border); font-size: .75rem; }