:root {
  --black: #101010;
  --black-soft: #1d1a18;
  --white: #eeeeee;
  --white-soft: #b8b3b0;
  --muted: #8a8380;
  --line: #3d3a39;
  --line-strong: #4d4947;
  --orange: #ee6018;
  --green: #a0ca92;
  --edge: clamp(20px, 4.8vw, 76px);
  --content: 1200px;
  --header: 64px;
  --sans: "Geist", Inter, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --mono: "Geist Mono", "JetBrains Mono", "IBM Plex Mono", ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  color-scheme: dark;
}

* { box-sizing: border-box; }
html { background: var(--black); color: var(--white); scroll-behavior: smooth; scroll-padding-top: calc(var(--header) + 24px); }
body { margin: 0; min-width: 320px; overflow-x: hidden; background: var(--black); color: var(--white); font-family: var(--sans); -webkit-font-smoothing: antialiased; text-rendering: optimizeLegibility; }
body.menu-open { overflow: hidden; }
a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; }
button, input, select, textarea { font: inherit; }
button { color: inherit; }
h1, h2, h3, p { margin-top: 0; }
h1, h2, h3 { text-wrap: balance; }
p { text-wrap: pretty; }
:focus-visible { outline: 2px solid var(--white); outline-offset: 5px; }

.skip-link { position: fixed; z-index: 3000; top: -100px; left: 18px; padding: 12px 16px; background: var(--white); color: var(--black); }
.skip-link:focus { top: 12px; }
.shell { width: min(calc(100% - (2 * var(--edge))), var(--content)); margin-inline: auto; }
.eyebrow { margin-bottom: 14px; color: var(--muted); font-family: var(--mono); font-size: 11px; line-height: 1.45; letter-spacing: 0.08em; text-transform: uppercase; }
.muted { color: var(--muted); }

.site-header { position: sticky; z-index: 1000; top: 0; height: var(--header); border-bottom: 1px solid var(--line); background: rgba(16, 16, 16, 0.96); }
.site-header .shell { width: min(calc(100% - (2 * clamp(18px, 2.6vw, 42px))), 1640px); margin-inline: auto; }
.header-inner { height: 100%; display: grid; grid-template-columns: 1fr auto auto; align-items: center; gap: 34px; }
.brand { display: inline-flex; align-items: center; gap: 13px; width: fit-content; }
.brand img { width: 27px; height: 27px; }
.brand span { font-size: 14px; font-weight: 500; letter-spacing: 0.2em; }
.desktop-nav { display: flex; align-items: center; gap: clamp(22px, 2.9vw, 46px); }
.desktop-nav a, .language-switch, .menu-toggle { color: var(--white-soft); font-size: 14px; transition: color 160ms ease; }
.desktop-nav a:hover, .desktop-nav a:focus-visible, .desktop-nav a[aria-current="page"], .language-switch:hover { color: var(--white); }
.language-switch { font-family: var(--mono); font-size: 12px; letter-spacing: 0.04em; white-space: nowrap; }
.menu-toggle { display: none; min-height: 44px; border: 1px solid var(--line-strong); border-radius: 3px; background: transparent; padding: 0 15px; cursor: pointer; }
.mobile-menu { position: fixed; z-index: 999; inset: var(--header) 0 0; background: rgba(16, 16, 16, 0.99); }
.mobile-menu[hidden] { display: none; }
.mobile-menu nav { padding: 30px var(--edge) max(32px, env(safe-area-inset-bottom)); display: grid; }
.mobile-menu a { min-height: 58px; display: flex; align-items: center; border-bottom: 1px solid var(--line); font-size: 22px; }
.mobile-menu .menu-contact { margin-top: 28px; justify-content: center; border: 1px solid var(--white); background: var(--white); color: var(--black); font-family: var(--mono); font-size: 13px; font-weight: 700; }

body[data-page="home"] .site-header { border-bottom-color: rgba(255, 255, 255, 0.13); background: #000; }
.brand-hero { min-height: calc(100svh - var(--header)); display: grid; place-items: center; overflow: hidden; background: #000; color: #fff; }
.brand-hero-inner { padding-block: clamp(72px, 10vh, 130px); display: flex; flex-direction: column; align-items: center; text-align: center; }
.brand-hero-kicker { margin: 0 0 clamp(24px, 4vh, 44px); color: rgba(255, 255, 255, 0.56); font-family: var(--mono); font-size: 10px; letter-spacing: 0.18em; }
.brand-hero h1 { margin: 0; color: #fff; font-size: clamp(74px, 14.8vw, 214px); font-weight: 400; line-height: 0.82; letter-spacing: -0.034em; text-shadow: 0 0 2px rgba(255, 255, 255, 0.96), 0 0 28px rgba(255, 255, 255, 0.18), 0 0 72px rgba(255, 255, 255, 0.08); white-space: nowrap; }
.brand-hero-slogan { margin: clamp(30px, 5vh, 52px) 0 0; color: rgba(255, 255, 255, 0.82); font-size: clamp(15px, 1.35vw, 20px); letter-spacing: -0.02em; }
.brand-hero-next { margin-top: clamp(54px, 9vh, 92px); display: flex; flex-direction: column; align-items: center; gap: 12px; color: rgba(255, 255, 255, 0.55); font-family: var(--mono); font-size: 9px; letter-spacing: 0.12em; }
.brand-hero-next i { width: 34px; height: 34px; display: grid; place-items: center; border: 1px solid rgba(255, 255, 255, 0.24); border-radius: 50%; color: #fff; font-family: var(--sans); font-style: normal; animation: brand-arrow 2.4s ease-in-out infinite; }
@keyframes brand-arrow { 0%, 100% { transform: translateY(0); } 50% { transform: translateY(6px); } }
.home-service-intro { padding: clamp(80px, 9vw, 134px) 0; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.home-service-grid { display: grid; grid-template-columns: minmax(0, 1.15fr) minmax(330px, 0.65fr); gap: clamp(48px, 8vw, 130px); align-items: end; }
.home-service-grid h2 { max-width: 820px; margin: 0; font-size: clamp(48px, 6.4vw, 92px); font-weight: 400; line-height: 0.96; letter-spacing: -0.055em; }
.home-service-grid .hero-actions { margin-top: 28px; }

.hero { padding: clamp(58px, 5.5vw, 82px) 0 clamp(46px, 4vw, 64px); display: flex; align-items: flex-start; }
.hero-grid { display: grid; grid-template-columns: minmax(0, 1.03fr) minmax(410px, 0.97fr); gap: clamp(24px, 3vw, 60px); align-items: center; }
.hero h1 { margin-bottom: 27px; max-width: 760px; font-size: clamp(58px, 6.25vw, 101px); font-weight: 400; line-height: 0.96; letter-spacing: -0.055em; }
.hero-intro { margin-bottom: 7px; font-size: clamp(18px, 1.5vw, 24px); line-height: 1.35; }
.hero-sub { margin-bottom: 0; color: var(--muted); font-size: clamp(16px, 1.2vw, 19px); line-height: 1.5; }
.hero-actions { margin-top: 34px; display: flex; align-items: center; gap: 30px; flex-wrap: wrap; }
.primary-button, .secondary-button { min-height: 52px; padding: 0 28px; display: inline-flex; align-items: center; justify-content: center; border: 1px solid var(--white); border-radius: 3px; font-family: var(--mono); font-size: 13px; font-weight: 500; letter-spacing: -0.02em; transition: transform 160ms ease, background 160ms ease, color 160ms ease; }
.primary-button { background: var(--white); color: var(--black); }
.secondary-button { background: transparent; color: var(--white); }
.primary-button:hover, .secondary-button:hover { transform: translateY(-2px); }
.secondary-link { padding-bottom: 5px; border-bottom: 1px solid var(--line-strong); font-family: var(--mono); font-size: 13px; }
.hero-art { position: relative; min-width: 0; }
.hero-art-visual { width: 100%; aspect-ratio: 3 / 2; background: var(--black) center / contain no-repeat url("/assets/plurivum-topology-hero.webp"); transform: translate3d(var(--art-x, 0), var(--art-y, 0), 0) rotate(var(--art-r, 0)); transition: transform 800ms cubic-bezier(.2,.8,.2,1); }
.hero-art small { position: absolute; right: 0; bottom: 2px; color: #74736f; font-family: var(--mono); font-size: 9px; letter-spacing: 0.06em; }

.pricing { border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.price-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 0; }
.price-item {
  min-width: 0;
  padding: 28px clamp(18px, 2.6vw, 42px) 32px 0;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  position: relative;
}
.price-item + .price-item { padding-left: clamp(18px, 2.6vw, 42px); border-left: 1px solid var(--line); }
.price-item--featured { background: rgba(238, 96, 24, 0.03); }
.price-badge {
  display: inline-block;
  align-self: flex-start;
  padding: 3px 8px;
  border-radius: 3px;
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: .12em;
  font-weight: 600;
  background: rgba(238, 96, 24, 0.15);
  border: 1px solid var(--orange);
  color: var(--orange);
  margin-bottom: 12px;
}
.price-header { margin-bottom: 8px; }
.price-item h2 { margin-bottom: 8px; color: var(--white-soft); font-size: clamp(17px, 1.35vw, 22px); font-weight: 400; line-height: 1.25; }
.price-item p { margin-bottom: 0; font-size: clamp(34px, 3.3vw, 53px); font-weight: 300; line-height: 1; letter-spacing: -0.04em; }
.price-sub { display: block; font-family: var(--mono); font-size: 11px; color: var(--muted); margin-top: 8px; }
.price-features {
  list-style: none;
  padding: 0;
  margin: 22px 0 16px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.price-features li { font-size: 13px; line-height: 1.45; color: var(--white-soft); }
.price-cta { margin-top: auto; padding-top: 16px; }
.price-cta .primary-button, .price-cta .secondary-button {
  width: 100%;
  text-align: center;
  justify-content: center;
  font-size: 13px;
}
.complexity { border-top: 1px solid var(--line); }
.complexity-head { min-height: 65px; display: grid; grid-template-columns: 250px 1fr; align-items: center; gap: 20px; }
.complexity-head h2 { margin: 0; font-family: var(--mono); font-size: 12px; font-weight: 500; letter-spacing: 0.04em; text-transform: uppercase; }
.complexity-head button { display: none; }
.factors { display: flex; align-items: center; justify-content: space-between; gap: 18px; color: var(--white-soft); }
.factors span { font-size: 14px; white-space: nowrap; }
.factors span + span::before { content: "·"; margin-right: clamp(13px, 1.8vw, 30px); color: #696864; }
.price-note { padding: 17px 0 22px; border-top: 1px solid var(--line); color: var(--muted); font-size: 13px; line-height: 1.5; }

.section { padding: clamp(82px, 8vw, 132px) 0; }
.section + .section { border-top: 1px solid var(--line); }
.section-heading { max-width: 920px; margin-bottom: 54px; font-size: clamp(44px, 5.4vw, 86px); font-weight: 400; line-height: 0.98; letter-spacing: -0.05em; }
.section-lead { max-width: 720px; color: var(--white-soft); font-size: clamp(19px, 1.7vw, 27px); line-height: 1.45; }
.studio-grid { display: grid; grid-template-columns: minmax(0, 1.25fr) minmax(280px, 0.75fr); gap: clamp(48px, 9vw, 150px); align-items: end; }
.studio-grid h2 { margin-bottom: 22px; max-width: 900px; font-size: clamp(46px, 5.3vw, 86px); font-weight: 400; line-height: 0.98; letter-spacing: -0.05em; }
.studio-grid p:not(.eyebrow) { margin-bottom: 0; color: var(--muted); font-size: clamp(18px, 1.5vw, 23px); line-height: 1.5; }
.studio-aside { padding-top: 24px; border-top: 1px solid var(--line-strong); }
.studio-aside p { color: var(--white-soft) !important; font-size: 15px !important; }

.process-list { border-top: 1px solid var(--line); }
.process-row { min-height: 96px; display: grid; grid-template-columns: 84px minmax(180px, 0.7fr) minmax(0, 1.3fr); align-items: center; gap: 24px; border-bottom: 1px solid var(--line); }
.process-row span { color: var(--muted); font-family: var(--mono); font-size: 11px; }
.process-row h3 { margin: 0; font-size: clamp(24px, 2.2vw, 36px); font-weight: 400; }
.process-row p { margin: 0; color: var(--muted); font-size: 15px; line-height: 1.5; }

.research-teaser { display: grid; grid-template-columns: minmax(0, 1fr) minmax(420px, 1fr); gap: clamp(48px, 8vw, 130px); align-items: center; }
.research-teaser h2 { margin-bottom: 5px; font-size: clamp(50px, 6vw, 96px); font-weight: 400; letter-spacing: -0.055em; }
.elyra-name { margin-bottom: 28px; color: var(--white-soft); font-size: 16px; line-height: 1.45; }
.status-list { margin: 0 0 28px; padding: 0; list-style: none; font-family: var(--mono); font-size: 13px; line-height: 1.75; }
.boundary { max-width: 540px; padding-top: 20px; border-top: 1px solid var(--line); color: var(--muted); font-size: 14px; line-height: 1.55; }
.research-actions { margin-top: 28px; display: flex; align-items: center; gap: 28px; flex-wrap: wrap; }
.research-lead { max-width: 580px; color: var(--white-soft); font-size: clamp(17px, 1.55vw, 22px); line-height: 1.5; }
.horizon-tags { margin: 26px 0 8px; display: flex; flex-wrap: wrap; gap: 8px; }
.horizon-tags span { padding: 8px 10px; border: 1px solid var(--line); border-radius: 3px; color: var(--white-soft); font-family: var(--mono); font-size: 10px; line-height: 1.2; letter-spacing: -0.02em; text-transform: uppercase; }

.page-hero { padding: clamp(70px, 8vw, 124px) 0 clamp(72px, 8vw, 126px); border-bottom: 1px solid var(--line); }
.page-hero h1 { max-width: 1000px; margin-bottom: 25px; font-size: clamp(54px, 7.4vw, 118px); font-weight: 400; line-height: 0.92; letter-spacing: -0.06em; }
.page-hero p:not(.eyebrow) { max-width: 780px; margin-bottom: 0; color: var(--white-soft); font-size: clamp(19px, 1.8vw, 28px); line-height: 1.45; }
.content-grid { display: grid; grid-template-columns: minmax(210px, 0.35fr) minmax(0, 1fr); gap: clamp(42px, 8vw, 130px); }
.content-grid > *, .prose, .detail-list li, .detail-list span { min-width: 0; }
.detail-list span { overflow-wrap: anywhere; }
.content-grid > aside { align-self: start; position: sticky; top: calc(var(--header) + 34px); }
.content-grid > aside p { color: var(--muted); font-family: var(--mono); font-size: 11px; line-height: 1.6; }
.prose { max-width: 850px; }
.prose section { padding: 0 0 58px; }
.prose section + section { padding-top: 58px; border-top: 1px solid var(--line); }
.prose h2 { margin-bottom: 20px; font-size: clamp(32px, 3.4vw, 54px); font-weight: 400; line-height: 1.05; letter-spacing: -0.035em; }
.prose h3 { margin-bottom: 14px; font-size: 21px; font-weight: 500; }
.prose p, .prose li { color: var(--white-soft); font-size: 17px; line-height: 1.65; }
.prose p:last-child { margin-bottom: 0; }
.prose ul { padding-left: 20px; }
.prose a:not(.primary-button):not(.secondary-button) { border-bottom: 1px solid var(--line-strong); }
.detail-list { margin: 0; padding: 0; list-style: none; border-top: 1px solid var(--line); }
.detail-list li { padding: 20px 0; display: grid; grid-template-columns: minmax(150px, 0.42fr) minmax(0, 1fr); gap: 28px; border-bottom: 1px solid var(--line); }
.detail-list strong { color: var(--white); font-weight: 500; }
.detail-list span { color: var(--muted); }
.quote-band { padding: 36px 0; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.quote-band .shell { display: flex; align-items: center; justify-content: space-between; gap: 30px; }
.quote-band h2 { margin: 0; max-width: 800px; font-size: clamp(30px, 3.7vw, 58px); font-weight: 400; line-height: 1.05; letter-spacing: -0.04em; }

.observer { overflow: hidden; border: 1px solid var(--line-strong); background: var(--black-soft); }
.observer img { width: 100%; height: auto; }
.observer figcaption { padding: 14px 16px; display: flex; justify-content: space-between; gap: 20px; color: var(--muted); font-family: var(--mono); font-size: 10px; line-height: 1.5; }
.evidence-grid { display: grid; grid-template-columns: repeat(3, 1fr); border-top: 1px solid var(--line); }
.evidence-grid article { padding: 28px 28px 30px 0; }
.evidence-grid article + article { padding-left: 28px; border-left: 1px solid var(--line); }
.evidence-grid h2 { margin-bottom: 15px; font-family: var(--mono); font-size: 13px; font-weight: 500; }
.evidence-grid h3 { margin-bottom: 14px; font-size: 27px; font-weight: 400; }
.evidence-grid p { color: var(--muted); font-size: 15px; line-height: 1.55; }

.elyra-hero { padding-top: clamp(54px, 7vw, 94px); }
.elyra-hero-grid { display: grid; grid-template-columns: minmax(0, 0.78fr) minmax(480px, 1.22fr); align-items: center; gap: clamp(42px, 7vw, 100px); }
.elyra-hero .elyra-expansion { max-width: 560px; color: var(--white); font-size: clamp(17px, 1.5vw, 22px); }
.elyra-hero .elyra-promise { margin-top: 24px; max-width: 600px; color: var(--muted); font-size: clamp(18px, 1.65vw, 25px); }
.elyra-hero .elyra-hero-note { margin-top: 16px; max-width: 560px; color: var(--white-soft); font-size: 15px; line-height: 1.5; }
.resonance-field { position: relative; min-width: 0; margin: 0; overflow: hidden; border: 1px solid var(--line); border-radius: 20px; background: var(--black); }
.resonance-field canvas { display: block; width: 100%; height: clamp(380px, 44vw, 560px); background: var(--black); }
.resonance-field--compact { border-radius: 10px; }
.resonance-field--compact canvas { height: clamp(330px, 36vw, 450px); }
.resonance-toolbar { position: absolute; z-index: 2; inset: 0 0 auto; min-height: 44px; padding: 0 16px; display: flex; align-items: center; justify-content: space-between; gap: 14px; border-bottom: 1px solid var(--line); background: var(--black); color: var(--muted); font-family: var(--mono); font-size: 9px; letter-spacing: -0.02em; }
.resonance-toolbar span { display: inline-flex; align-items: center; gap: 8px; white-space: nowrap; }
.resonance-toolbar i { width: 6px; height: 6px; border-radius: 50%; background: var(--orange); }
.resonance-readout { position: absolute; z-index: 2; inset: auto 16px 43px; display: grid; grid-template-columns: repeat(4, 1fr); gap: 8px; }
.resonance-readout span { padding-top: 8px; border-top: 1px solid var(--line); color: var(--muted); font-family: var(--mono); font-size: 9px; letter-spacing: -0.02em; }
.resonance-readout span:nth-child(2), .resonance-readout span:nth-child(3) { color: var(--green); }
.resonance-field figcaption { min-height: 42px; padding: 12px 16px; border-top: 1px solid var(--line); color: var(--muted); font-family: var(--mono); font-size: 9px; line-height: 1.45; }
.research-statement { display: grid; grid-template-columns: minmax(0, 1fr) minmax(360px, 0.72fr); gap: clamp(40px, 8vw, 120px); align-items: center; }
.research-statement h2 { max-width: 720px; margin: 0; font-size: clamp(42px, 5.2vw, 72px); font-weight: 400; line-height: 1; letter-spacing: -0.04em; }
.light-card { padding: clamp(28px, 4vw, 48px); border-radius: 10px; background: var(--white); color: var(--black); }
.light-card p { margin: 0; font-size: clamp(18px, 1.55vw, 23px); line-height: 1.5; }
.horizon-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 24px; }
.horizons-intro { max-width: 640px; margin: -28px 0 48px; color: var(--muted); font-size: 17px; line-height: 1.5; }
.horizon-grid article { min-height: 420px; padding: 24px; display: flex; flex-direction: column; border: 1px solid var(--line); border-radius: 10px; background: #121212; overflow: hidden; }
.horizon-grid span { color: var(--orange); font-family: var(--mono); font-size: 11px; }
.horizon-grid h3 { margin: 10px 0 18px; font-size: clamp(27px, 2.6vw, 38px); font-weight: 400; line-height: 1.08; letter-spacing: -0.03em; }
.horizon-grid p { margin: 0; color: var(--muted); font-size: 15px; line-height: 1.5; }
.horizon-visual { width: calc(100% + 48px); height: 152px; margin: 20px -24px 18px; display: block; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); background: var(--black); }
.horizon-visual path, .horizon-visual ellipse { fill: none; stroke: #4d4947; stroke-width: 1.2; vector-effect: non-scaling-stroke; }
.horizon-visual circle { fill: #8a8380; }
.horizon-visual .core { fill: var(--orange); }
.horizon-visual .signal { fill: var(--orange); }
.horizon-visual .signal-green { fill: var(--green); }
.horizon-visual .visual-boundary { stroke: #8a8380; stroke-dasharray: 3 7; animation: visual-dash 12s linear infinite; }
.horizon-visual .visual-loop { stroke: var(--green); stroke-dasharray: 2 8; animation: visual-dash-reverse 9s linear infinite; }
.horizons-boundary { margin: 28px 0 0; padding-top: 20px; border-top: 1px solid var(--line); color: var(--muted); font-family: var(--mono); font-size: 10px; line-height: 1.5; text-transform: uppercase; }
@keyframes visual-dash { to { stroke-dashoffset: -80; } }
@keyframes visual-dash-reverse { to { stroke-dashoffset: 80; } }

.legal-index { margin: 0; padding: 0; list-style: none; border-top: 1px solid var(--line); }
.legal-index a { min-height: 74px; padding: 0 4px; display: flex; align-items: center; justify-content: space-between; gap: 24px; border-bottom: 1px solid var(--line); font-size: clamp(20px, 2vw, 31px); }
.legal-index span { color: var(--muted); font-size: 14px; }
.legal-version { color: var(--muted); font-family: var(--mono); font-size: 11px; }

.site-footer { border-top: 1px solid var(--line); }
.footer-main { padding: 34px 0 40px; display: grid; grid-template-columns: minmax(0, 1.4fr) minmax(280px, 0.6fr); gap: 48px; }
.footer-identity { max-width: 810px; margin-bottom: 0; color: var(--muted); font-size: 12px; line-height: 1.6; }
.footer-nav { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 12px 28px; align-content: start; }
.footer-nav a { color: var(--white-soft); font-size: 13px; }
.footer-bottom { padding: 18px 0 max(20px, env(safe-area-inset-bottom)); display: flex; justify-content: space-between; gap: 24px; border-top: 1px solid var(--line); color: #74736f; font-family: var(--mono); font-size: 10px; }
.mobile-action { display: none; }

@media (max-width: 980px) {
  :root { --header: 68px; }
  .desktop-nav { display: none; }
  .header-inner { grid-template-columns: 1fr auto auto; gap: 18px; }
  .menu-toggle { display: inline-flex; align-items: center; }
  .hero { min-height: auto; }
  .hero-grid { grid-template-columns: 1fr; }
  .hero-copy { max-width: 820px; }
  .hero-art { max-width: 720px; justify-self: center; }
  .complexity-head { grid-template-columns: 210px 1fr; }
  .factors { overflow: hidden; }
  .factors span:nth-last-child(-n+2) { display: none; }
  .research-teaser { grid-template-columns: 1fr; }
  .resonance-field--compact { width: min(100%, 720px); }
  .elyra-hero-grid { grid-template-columns: 1fr; }
  .home-service-grid { grid-template-columns: 1fr; }
  .research-statement { grid-template-columns: 1fr; }
  .horizon-grid { grid-template-columns: 1fr; }
  .horizon-grid article { min-height: 250px; }
}

@media (max-width: 720px) {
  :root { --edge: 20px; --header: 66px; }
  .brand { gap: 10px; }
  .brand img { width: 24px; height: 24px; }
  .brand span { font-size: 12px; letter-spacing: 0.17em; }
  .language-switch { font-size: 11px; }
  .menu-toggle { min-width: 72px; padding: 0 12px; }
  .brand-hero-inner { padding-block: 74px 82px; }
  .brand-hero-kicker { margin-bottom: 30px; font-size: 9px; }
  .brand-hero h1 { width: 100%; font-size: clamp(59px, 20.5vw, 81px); line-height: 0.9; letter-spacing: -0.032em; white-space: normal; overflow-wrap: normal; }
  .brand-hero-slogan { margin-top: 31px; }
  .brand-hero-next { margin-top: 64px; }
  .home-service-intro { padding: 74px 0; }
  .home-service-grid { gap: 34px; }
  .home-service-grid h2 { font-size: clamp(44px, 13vw, 62px); }
  .hero { padding: 46px 0 26px; }
  .hero-grid { gap: 18px; }
  .hero h1 { margin-bottom: 25px; font-size: clamp(51px, 15vw, 68px); line-height: 0.98; }
  .hero-intro { font-size: 21px; }
  .hero-sub { display: none; }
  .hero-actions { margin-top: 27px; display: grid; gap: 17px; }
  .hero-actions .primary-button { width: 100%; }
  .secondary-link { width: fit-content; }
  .hero-art { display: none; }
  .hero-art small { display: none; }
  .price-grid { grid-template-columns: 1fr; }
  .price-item { min-height: auto; padding: 24px 0; display: flex; flex-direction: column; align-items: stretch; justify-content: flex-start; gap: 14px; }
  .price-item + .price-item { padding-left: 0; border-top: 1px solid var(--line); border-left: 0; }
  .price-item h2 { margin: 0 0 6px 0; max-width: 100%; font-size: 19px; }
  .price-item p { font-size: 36px; white-space: normal; }
  .complexity-head { min-height: 62px; display: flex; justify-content: space-between; }
  .complexity-head button { width: 44px; height: 44px; display: grid; place-items: center; border: 0; background: transparent; font-size: 26px; cursor: pointer; }
  .factors { padding: 0 0 18px; display: grid; grid-template-columns: 1fr 1fr; gap: 12px 18px; }
  .factors[hidden] { display: none; }
  .factors span, .factors span:nth-last-child(-n+2) { display: block; white-space: normal; font-size: 13px; }
  .factors span + span::before { display: none; }
  .price-note { font-size: 12px; }
  .section { padding: 74px 0; }
  .section-heading { margin-bottom: 38px; font-size: 46px; }
  .studio-grid { grid-template-columns: 1fr; gap: 40px; }
  .studio-grid h2 { font-size: 45px; }
  .process-row { min-height: 0; padding: 24px 0; grid-template-columns: 46px 1fr; gap: 8px 16px; }
  .process-row p { grid-column: 2; }
  .research-teaser h2 { font-size: 60px; }
  .resonance-field { margin-inline: calc(-1 * var(--edge)); border-right: 0; border-left: 0; border-radius: 0; }
  .resonance-field canvas, .resonance-field--compact canvas { height: min(92vw, 390px); }
  .resonance-toolbar { padding-inline: var(--edge); }
  .resonance-toolbar span:last-child { display: none; }
  .resonance-readout { inset-inline: var(--edge); grid-template-columns: repeat(2, 1fr); }
  .resonance-readout span:nth-child(n+3) { display: none; }
  .resonance-field figcaption { padding-inline: var(--edge); }
  .elyra-hero-grid { gap: 38px; }
  .elyra-hero .hero-actions { display: flex; }
  .elyra-hero .primary-button { width: auto; }
  .research-statement h2 { font-size: clamp(40px, 12vw, 58px); }
  .light-card { padding: 28px 24px; }
  .horizon-grid { gap: 12px; }
  .horizons-intro { margin-top: -18px; margin-bottom: 32px; }
  .horizon-grid article { min-height: 390px; }
  .horizon-visual { height: 146px; }
  .page-hero { padding: 58px 0 66px; }
  .page-hero h1 { font-size: clamp(50px, 15vw, 70px); }
  .content-grid { grid-template-columns: 1fr; gap: 24px; }
  .content-grid > aside { position: static; }
  .detail-list li { grid-template-columns: 1fr; gap: 8px; }
  .quote-band .shell { align-items: stretch; flex-direction: column; }
  .evidence-grid { grid-template-columns: 1fr; }
  .evidence-grid article { padding: 24px 0; }
  .evidence-grid article + article { padding-left: 0; border-top: 1px solid var(--line); border-left: 0; }
  .observer { margin-inline: calc(-1 * var(--edge)); border-right: 0; border-left: 0; }
  .observer figcaption { display: block; padding-inline: var(--edge); }
  .footer-main { grid-template-columns: 1fr; gap: 34px; }
  .footer-bottom { padding-bottom: calc(86px + env(safe-area-inset-bottom)); flex-direction: column; }
  .mobile-action { position: fixed; z-index: 900; inset: auto 0 0; min-height: 72px; padding: 10px max(16px, env(safe-area-inset-right)) calc(10px + env(safe-area-inset-bottom)) max(16px, env(safe-area-inset-left)); display: grid; grid-template-columns: 1fr auto; align-items: center; gap: 20px; border-top: 1px solid var(--line-strong); background: rgba(16, 16, 16, 0.97); }
  .mobile-action .primary-button { min-height: 48px; padding-inline: 18px; }
  .mobile-action a:last-child { padding-bottom: 4px; border-bottom: 1px solid var(--line-strong); font-size: 14px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { scroll-behavior: auto !important; animation-duration: 0.001ms !important; animation-iteration-count: 1 !important; transition-duration: 0.001ms !important; }
}