:root {
  --epsilon-black: #0b0c0e;
  --epsilon-charcoal: #17191c;
  --epsilon-dark-gray: #272a2f;
  --epsilon-red: #a5002d;
  --epsilon-red-bright: #c10c3a;
  --epsilon-off-white: #f6f6f4;
  --epsilon-white: #ffffff;
  --epsilon-muted: #8b8e94;
  --line-dark: rgba(255, 255, 255, 0.14);
  --line-light: rgba(11, 12, 14, 0.16);
  --space-1: 0.5rem;
  --space-2: 1rem;
  --space-3: 1.5rem;
  --space-4: 2rem;
  --space-5: 2.5rem;
  --space-6: 3rem;
  --space-7: 4rem;
  --space-8: 6rem;
  --type-hero: clamp(2.45rem, 3.6vw, 3.35rem);
  --type-section: clamp(1.9rem, 2.7vw, 2.45rem);
  --type-card: clamp(1.1rem, 1.25vw, 1.28rem);
  --type-body: 1rem;
  --type-ui: 0.78rem;
  --type-label: 0.68rem;
  --shell: min(1440px, calc(100vw - 96px));
  --header-height: 88px;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
}

*, *::before, *::after { box-sizing: border-box; }

html { scroll-behavior: smooth; scroll-padding-top: var(--header-height); }

body {
  margin: 0;
  color: var(--epsilon-black);
  background: var(--epsilon-off-white);
  font-family: "Space Grotesk", sans-serif;
  font-size: 16px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}

body.menu-open { overflow: hidden; }

a { color: inherit; text-decoration: none; }
button, input, textarea { font: inherit; }
button { color: inherit; }
img { display: block; max-width: 100%; }
p, h1, h2, h3 { margin: 0; }

.shell { width: var(--shell); margin-inline: auto; }

.skip-link {
  position: fixed;
  z-index: 1000;
  top: 0.75rem;
  left: 0.75rem;
  padding: 0.7rem 1rem;
  color: var(--epsilon-white);
  background: var(--epsilon-red);
  transform: translateY(-150%);
  transition: transform 180ms ease;
}

.skip-link:focus { transform: translateY(0); }

.site-header {
  position: fixed;
  z-index: 100;
  inset: 0 0 auto;
  height: var(--header-height);
  color: var(--epsilon-white);
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  background: linear-gradient(180deg, rgba(11,12,14,.88), rgba(11,12,14,.18));
  transition: background 300ms ease, height 300ms ease, border-color 300ms ease;
}

.site-header.is-scrolled {
  height: 72px;
  background: rgba(11, 12, 14, 0.94);
  border-color: var(--line-dark);
  backdrop-filter: blur(16px);
}
.site-header.is-scrolled .brand-image { height: 44px; }

.header-inner { height: 100%; display: flex; align-items: center; justify-content: space-between; }

.brand { position: relative; display: inline-flex; flex: 0 0 auto; align-items: center; }
.brand-image { display: block; width: auto; max-width: none; height: 50px; transition: height 220ms ease; }
.brand-fallback { display: inline-flex; flex-direction: column; line-height: 0.92; letter-spacing: -0.04em; }
.brand-fallback strong { font-size: 1.17rem; font-weight: 700; }
.brand-fallback small { margin-top: 0.26rem; color: var(--epsilon-muted); font-size: var(--type-label); font-weight: 600; letter-spacing: 0.18em; }
.brand.has-image .brand-fallback { display: none; }
.brand:not(.has-image) .brand-image { display: none; }

.desktop-nav { display: flex; align-items: center; gap: 1.5rem; margin-left: auto; margin-right: 1.5rem; }
.desktop-nav a, .header-cta, .language-switch, .mobile-menu a {
  font-size: var(--type-ui);
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.desktop-nav a { position: relative; color: rgba(255,255,255,0.76); transition: color 200ms ease; }
.desktop-nav a::after { position: absolute; content: ""; right: 0; bottom: -8px; left: 0; height: 1px; background: var(--epsilon-red-bright); transform: scaleX(0); transform-origin: right; transition: transform 250ms var(--ease); }
.desktop-nav a:hover { color: var(--epsilon-white); }
.desktop-nav a:hover::after { transform: scaleX(1); transform-origin: left; }

.header-actions { display: flex; align-items: center; gap: 1.1rem; }
.language-switch { display: flex; align-items: center; gap: 0.35rem; color: rgba(255,255,255,0.36); }
.lang-option { padding: 0; border: 0; color: inherit; background: transparent; cursor: pointer; transition: color 180ms ease; }
.lang-option.is-active { color: var(--epsilon-white); }
.header-cta { padding: 0.65rem .9rem; border: 1px solid rgba(255,255,255,0.36); transition: border-color 180ms ease, background 180ms ease; }
.header-cta:hover { border-color: var(--epsilon-red-bright); background: var(--epsilon-red); }
.desktop-nav a:focus-visible, .header-cta:focus-visible, .lang-option:focus-visible, .menu-toggle:focus-visible, .mobile-menu a:focus-visible, .button:focus-visible, .text-link:focus-visible { outline: 2px solid #f04a70; outline-offset: 5px; }
.menu-toggle { display: none; width: 44px; height: 44px; padding: 0 10px; border: 1px solid rgba(255,255,255,0.22); background: transparent; cursor: pointer; }
.menu-toggle span { display: block; width: 100%; height: 1px; background: currentColor; transition: transform 250ms ease; }
.menu-toggle span + span { margin-top: 7px; }
.menu-toggle[aria-expanded="true"] span:first-child { transform: translateY(4px) rotate(45deg); }
.menu-toggle[aria-expanded="true"] span:last-child { transform: translateY(-4px) rotate(-45deg); }
.mobile-menu { display: none; }

.hero {
  position: relative;
  min-height: max(620px, 94svh);
  overflow: hidden;
  color: var(--epsilon-white);
  background: radial-gradient(ellipse at 78% 48%, rgba(108,10,36,.2), transparent 35%), var(--epsilon-black);
}

.hero-grid, .contact-grid {
  position: absolute;
  inset: 0;
  opacity: 0.42;
  background-image: linear-gradient(rgba(255,255,255,.045) 1px, transparent 1px), linear-gradient(90deg, rgba(255,255,255,.045) 1px, transparent 1px);
  background-size: 72px 72px;
  mask-image: linear-gradient(to right, transparent, black 24%, black 80%, transparent);
}

.hero::before { position: absolute; content: ""; width: min(57vw, 820px); aspect-ratio: 1; top: 4%; right: -9%; border: 1px solid rgba(193,12,58,.22); border-radius: 50%; box-shadow: 0 0 0 54px rgba(193,12,58,.025), 0 0 0 108px rgba(193,12,58,.02); }
.hero::after { position: absolute; content: ""; width: 7px; height: 7px; top: 27%; right: 14%; background: var(--epsilon-red-bright); box-shadow: 0 0 0 6px rgba(193,12,58,.12), 0 0 28px rgba(193,12,58,.72); }
.hero-coordinate { position: absolute; z-index: 1; color: rgba(255,255,255,.38); font-size: .62rem; font-weight: 600; letter-spacing: .16em; }
.hero-coordinate--top { top: calc(var(--header-height) + 1.5rem); right: 4.5%; }
.hero-coordinate--side { right: 1.4rem; bottom: 31%; writing-mode: vertical-rl; }

.hero-inner { position: relative; z-index: 2; display: grid; grid-template-columns: minmax(0, 1.15fr) minmax(300px, .72fr); gap: clamp(2rem, 4vw, 4rem); align-items: center; min-height: max(620px, 94svh); padding-top: calc(var(--header-height) + 2rem); padding-bottom: 4rem; }
.eyebrow, .section-label { display: flex; align-items: center; gap: .7rem; font-size: var(--type-label); font-weight: 600; letter-spacing: .16em; text-transform: uppercase; }
.eyebrow { margin-bottom: 1.8rem; color: rgba(255,255,255,.62); }
.eyebrow span { width: 34px; height: 2px; background: var(--epsilon-red-bright); box-shadow: 0 0 12px rgba(193,12,58,.65); }
.eyebrow b { font: inherit; }
.hero h1 { max-width: 720px; font-size: var(--type-hero); font-weight: 600; line-height: 1.04; letter-spacing: -.045em; text-wrap: balance; }
.hero-lede { max-width: 580px; margin-top: 1.2rem; color: rgba(255,255,255,.76); font-size: var(--type-body); line-height: 1.7; }
.hero-actions { display: flex; align-items: center; gap: 1.8rem; margin-top: 2.1rem; }
.button { display: inline-flex; align-items: center; justify-content: space-between; gap: 1.6rem; min-width: 250px; min-height: 52px; padding: .85rem 1rem; font-size: var(--type-ui); font-weight: 600; letter-spacing: .06em; text-transform: uppercase; }
.button--primary { background: linear-gradient(110deg, #a5002d, #bd0a39); box-shadow: 0 12px 35px rgba(165,0,45,.18); transition: background 180ms ease, transform 180ms ease, box-shadow 180ms ease; }
.button--primary:hover { background: var(--epsilon-red-bright); box-shadow: 0 16px 38px rgba(193,12,58,.3); transform: translateY(-2px); }
.button-arrow { font-size: 1rem; }
.text-link { display: inline-flex; align-items: center; gap: .65rem; padding-block: .5rem; border-bottom: 1px solid rgba(255,255,255,.35); font-size: var(--type-ui); font-weight: 600; letter-spacing: .08em; text-transform: uppercase; transition: border-color 180ms ease; }
.text-link:hover { border-color: var(--epsilon-red-bright); }

.hero-system { align-self: center; justify-self: end; display: flex; width: 100%; max-width: 410px; flex-direction: column; justify-content: center; margin-top: 1rem; padding: 1rem 1rem .5rem; border: 1px solid rgba(255,255,255,.12); background: linear-gradient(145deg, rgba(255,255,255,.045), rgba(255,255,255,.012)); box-shadow: 0 20px 60px rgba(0,0,0,.2); backdrop-filter: blur(4px); }
.system-topline { display: flex; justify-content: space-between; padding-bottom: .7rem; border-bottom: 1px solid rgba(255,255,255,.22); color: rgba(255,255,255,.55); font-size: var(--type-label); font-weight: 600; letter-spacing: .12em; }
.status-dot { position: relative; padding-left: 12px; color: rgba(255,255,255,.62); }
.status-dot::before { position: absolute; content: ""; top: 50%; left: 0; width: 5px; height: 5px; border-radius: 50%; background: var(--epsilon-red-bright); transform: translateY(-50%); }
.system-core { position: relative; height: clamp(210px, 22vw, 260px); overflow: hidden; border-right: 1px solid rgba(255,255,255,.1); border-left: 1px solid rgba(255,255,255,.1); }
.system-axis { position: absolute; background: rgba(255,255,255,.12); }
.system-axis--x { top: 50%; right: 0; left: 0; height: 1px; }
.system-axis--y { top: 0; bottom: 0; left: 50%; width: 1px; }
.system-core::before, .system-core::after { position: absolute; content: ""; border: 1px solid rgba(255,255,255,.11); border-radius: 50%; }
.system-core::before { inset: 20% 13%; }
.system-core::after { inset: 35% 29%; }
.system-core::before { box-shadow: 0 0 70px rgba(193,12,58,.08), inset 0 0 48px rgba(193,12,58,.045); }
.node { position: absolute; z-index: 1; width: 6px; height: 6px; border: 1px solid var(--epsilon-red-bright); background: var(--epsilon-black); transform: rotate(45deg); }
.node--one { top: 20%; left: 50%; }
.node--two { right: 13%; top: 50%; }
.node--three { left: 29%; bottom: 34%; }
.system-index { position: absolute; right: 1rem; bottom: .8rem; color: rgba(255,255,255,.9); font-size: 1.3rem; font-weight: 500; }
.system-index span { color: var(--epsilon-muted); font-size: var(--type-label); letter-spacing: .08em; }
.system-list { display: grid; grid-template-columns: repeat(4, 1fr); margin: 0; padding: 0; border-top: 1px solid rgba(255,255,255,.22); list-style: none; }
.system-list li { display: flex; flex-direction: column; gap: .3rem; padding: .7rem .5rem .7rem 0; border-right: 1px solid rgba(255,255,255,.12); font-size: var(--type-label); font-weight: 600; letter-spacing: .08em; }
.system-list li:last-child { border-right: 0; padding-left: .6rem; }
.system-list span { color: var(--epsilon-red-bright); font-size: .64rem; }
.system-list .system-name { color: inherit; font: inherit; }
.hero-copy, .hero-system { animation: hero-arrive 700ms var(--ease) both; }
.hero-system { animation-delay: 120ms; }
@keyframes hero-arrive { from { opacity: 0; transform: translateY(14px); } to { opacity: 1; transform: translateY(0); } }
.hero-bottom { position: absolute; z-index: 2; right: 0; bottom: 1.4rem; left: 0; display: flex; justify-content: space-between; color: rgba(255,255,255,.42); font-size: .62rem; font-weight: 600; letter-spacing: .12em; }

.section { position: relative; padding-block: var(--space-8); }
.services { padding-top: 5.5rem; padding-bottom: 0; background: var(--epsilon-off-white); }
.services > .shell, .team > .shell { max-width: 1220px; }
.services .section-intro { gap: 2rem; margin-bottom: clamp(2.25rem, 4vw, 3.5rem); }
.services .intro-copy > p { max-width: 680px; }
.section-intro { display: grid; grid-template-columns: 1fr 3fr; gap: var(--space-5); margin-bottom: var(--space-7); }
.section-label { align-self: start; padding-top: .6rem; color: var(--epsilon-black); }
.section-label span { color: var(--epsilon-red); }
.section-label b { font-weight: 600; }
.intro-copy { max-width: 980px; }
.intro-copy h2, .method-heading h2, .contact h2 { font-size: var(--type-section); font-weight: 600; line-height: 1.12; letter-spacing: -.04em; }
.intro-copy > p { max-width: 700px; margin-top: 1.2rem; color: #5e6166; font-size: var(--type-body); line-height: 1.7; }

.services-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); border-top: 1px solid var(--line-light); border-left: 1px solid var(--line-light); }
.service-card { position: relative; display: grid; grid-template-columns: 32px minmax(0, 1fr); gap: .85rem; min-height: 232px; padding: 1.3rem; overflow: hidden; border-right: 1px solid var(--line-light); border-bottom: 1px solid var(--line-light); background: rgba(255,255,255,.14); transition: background 280ms ease, transform 280ms var(--ease), box-shadow 280ms ease; }
.service-card::after { position: absolute; content: ""; right: 0; bottom: 0; left: 0; height: 3px; background: var(--epsilon-red); transform: scaleX(0); transform-origin: left; transition: transform 350ms var(--ease); }
.service-card:hover { z-index: 2; background: var(--epsilon-white); transform: translateY(-3px); box-shadow: 0 16px 36px rgba(11,12,14,.08); }
.service-card:hover::after { transform: scaleX(1); }
.service-number { align-self: start; display: inline-flex; justify-content: center; min-width: 32px; padding: .28rem .2rem; border-top: 1px solid var(--epsilon-red); color: var(--epsilon-red); font-size: var(--type-label); font-weight: 600; letter-spacing: .08em; }
.service-card > div { display: flex; min-width: 0; flex-direction: column; align-items: flex-start; }
.service-card h3 { max-width: 280px; font-size: var(--type-card); font-weight: 600; line-height: 1.22; letter-spacing: -.025em; }
.service-card p { max-width: 340px; margin-top: .75rem; color: #55595f; font-size: .9rem; line-height: 1.65; }
.service-outcome { display: inline-flex; align-items: center; gap: .55rem; margin-top: auto; padding-top: 1.1rem; color: #34363a; font-size: var(--type-ui); font-weight: 600; line-height: 1.4; letter-spacing: .01em; }
.service-outcome::before { content: ""; width: 5px; height: 5px; flex: 0 0 auto; background: var(--epsilon-red); transform: rotate(45deg); }
.card-corner { position: absolute; top: 1.45rem; right: 1.5rem; color: #72767c; font-size: .85rem; transition: color 200ms ease, transform 200ms ease; }
.service-card:hover .card-corner { color: var(--epsilon-red); transform: translate(2px, 2px); }

.method { margin-top: var(--space-8); padding-block: var(--space-8); color: var(--epsilon-white); background: var(--epsilon-charcoal); }
.method-heading { display: grid; grid-template-columns: 1fr 2fr 1fr; gap: var(--space-5); align-items: end; }
.section-label--dark { color: rgba(255,255,255,.62); }
.method-heading h2 { font-size: var(--type-section); }
.method-heading > p { color: rgba(255,255,255,.52); font-size: .9rem; line-height: 1.7; }
.method-steps { display: grid; grid-template-columns: repeat(5, 1fr); margin: var(--space-7) 0 0; padding: 0; list-style: none; }
.method-steps li { min-height: 190px; padding-right: 1.25rem; }
.step-top { display: flex; align-items: center; }
.step-top span { color: var(--epsilon-red-bright); font-size: var(--type-label); font-weight: 600; letter-spacing: .1em; }
.step-top i { position: relative; display: block; flex: 1; height: 1px; margin-left: .8rem; background: rgba(255,255,255,.2); }
.step-top i::after { position: absolute; content: ""; top: -3px; right: 0; width: 7px; height: 7px; border: 1px solid var(--epsilon-red-bright); border-radius: 50%; background: var(--epsilon-charcoal); }
.method-steps h3 { margin-top: 2rem; font-size: 1.15rem; font-weight: 600; }
.method-steps p { max-width: 190px; margin-top: .75rem; color: rgba(255,255,255,.62); font-size: .9rem; line-height: 1.65; }

.team { padding-block: 5.5rem; background: var(--epsilon-white); }
.section-intro--team { gap: 2rem; margin-bottom: 2.75rem; }
.section-intro--team .intro-copy { max-width: 1050px; }
.founders-grid { display: grid; grid-template-columns: repeat(3, 1fr); border-top: 1px solid var(--line-light); border-left: 1px solid var(--line-light); }
.founder-card { display: grid; grid-template-rows: auto 1fr; min-width: 0; border-right: 1px solid var(--line-light); border-bottom: 1px solid var(--line-light); }
.founder-visual { position: relative; display: block; aspect-ratio: 16 / 10; overflow: hidden; color: rgba(255,255,255,.7); background: var(--epsilon-dark-gray); }
.founder-photo { width: 100%; height: 100%; object-fit: cover; object-position: center; filter: grayscale(1) contrast(.96); transform: scale(1.01); transition: filter 450ms ease, transform 600ms var(--ease); }
.founder-card:hover .founder-photo { filter: grayscale(.12) contrast(1); transform: scale(1.035); }
.founder-id { position: absolute; z-index: 2; top: 1rem; left: 1rem; font-size: var(--type-label); font-weight: 600; letter-spacing: .14em; }
.portrait-grid { position: absolute; inset: 0; pointer-events: none; opacity: .26; background-image: linear-gradient(rgba(255,255,255,.075) 1px, transparent 1px), linear-gradient(90deg, rgba(255,255,255,.075) 1px, transparent 1px); background-size: 42px 42px; mask-image: linear-gradient(to bottom right, black, transparent 75%); }
.founder-body { display: flex; flex-direction: column; min-height: 270px; padding: 1.45rem; }
.founder-label { color: var(--epsilon-red); font-size: var(--type-label); font-weight: 600; letter-spacing: .14em; }
.founder-body h3 { margin-top: 1.2rem; font-size: 1.3rem; font-weight: 600; letter-spacing: -.025em; }
.founder-description { max-width: 350px; margin-top: .75rem; color: #66696e; font-size: .9rem; line-height: 1.65; }
.founder-experience { display: grid; gap: .7rem; margin-top: .8rem; }
.founder-experience p { display: grid; gap: .28rem; }
.founder-experience span { color: var(--epsilon-red); font-size: .64rem; font-weight: 600; letter-spacing: .1em; }
.founder-experience strong { display: grid; gap: .18rem; color: #66696e; font-size: .86rem; font-weight: 400; line-height: 1.5; }
.founder-experience strong b { color: #2d2f33; font-size: var(--type-label); font-weight: 600; letter-spacing: .08em; }
.founder-experience strong em { font: inherit; }
.founder-link { display: flex; align-items: center; justify-content: space-between; gap: 1rem; margin-top: auto; padding-top: 1rem; color: #34363a; font-size: var(--type-label); font-weight: 600; letter-spacing: .12em; border-top: 1px solid var(--line-light); transition: color 180ms ease; }
.founder-link:hover { color: var(--epsilon-red); }
.founder-statement { display: flex; align-items: center; margin-top: 1.5rem; padding-top: 1.5rem; border-top: 1px solid var(--line-light); }
.founder-statement p { font-size: var(--type-body); font-weight: 500; letter-spacing: -.01em; }

.contact { overflow: hidden; color: var(--epsilon-white); background: var(--epsilon-black); }
.contact::before { position: absolute; content: ""; top: 0; right: 0; width: 35%; height: 2px; background: var(--epsilon-red); }
.contact-grid { opacity: .24; mask-image: linear-gradient(to left, black, transparent 70%); }
.contact-layout { position: relative; z-index: 1; display: grid; grid-template-columns: 1fr 1fr; gap: clamp(2rem, 5vw, 4.5rem); }
.contact h2 { margin-top: var(--space-4); }
.contact-copy > p:not(.section-label) { max-width: 540px; margin-top: 1.2rem; color: rgba(255,255,255,.68); font-size: var(--type-body); line-height: 1.7; }
.contact-meta { display: flex; gap: 2.5rem; margin-top: var(--space-6); padding-top: 1.3rem; border-top: 1px solid var(--line-dark); }
.contact-meta div { display: flex; flex-direction: column; gap: .45rem; }
.contact-meta span { color: var(--epsilon-muted); font-size: var(--type-label); font-weight: 600; letter-spacing: .12em; text-transform: uppercase; }
.contact-meta strong { font-size: var(--type-ui); font-weight: 500; letter-spacing: .04em; }
.contact-form { padding-top: 2rem; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 1.25rem; }
.contact-form label { display: block; margin-bottom: 1.35rem; }
.contact-form label > span { display: block; margin-bottom: .55rem; color: rgba(255,255,255,.8); font-size: var(--type-ui); font-weight: 600; letter-spacing: .1em; text-transform: uppercase; transition: color 180ms ease; }
.contact-form input, .contact-form textarea { width: 100%; min-height: 3rem; padding: .7rem .8rem; border: 1px solid rgba(255,255,255,.4); border-radius: 2px; outline: none; color: var(--epsilon-white); background: rgba(255,255,255,.045); resize: vertical; transition: border-color 180ms ease, background 180ms ease, box-shadow 180ms ease; }
.contact-form textarea { min-height: 7.5rem; }
.contact-form input::placeholder, .contact-form textarea::placeholder { color: rgba(255,255,255,.62); }
.contact-form label:focus-within > span { color: var(--epsilon-red-bright); }
.contact-form input:focus, .contact-form textarea:focus { border-color: #ff5278; background: rgba(255,255,255,.075); box-shadow: 0 0 0 3px rgba(255,82,120,.18); }
.contact-form input:user-invalid, .contact-form textarea:user-invalid { border-color: #ff748f; }
.message-field { margin-top: .8rem; }
.turnstile-block { margin-bottom: 1.3rem; }
.turnstile-hint { margin-top: .55rem; color: rgba(255,255,255,.78); font-size: var(--type-ui); line-height: 1.5; }
.turnstile-block[hidden] { display: none; }
.submit-button { display: flex; justify-content: space-between; align-items: center; width: 100%; min-height: 3.25rem; margin-top: .8rem; padding: .85rem .8rem; border: 1px solid var(--epsilon-red-bright); color: var(--epsilon-white); background: rgba(165,0,45,.18); font-size: var(--type-ui); font-weight: 600; letter-spacing: .1em; cursor: pointer; transition: padding 250ms var(--ease), background 200ms ease, opacity 180ms ease; }
.submit-button:hover { padding-inline: 1rem; background: var(--epsilon-red); }
.submit-button:disabled { opacity: .58; cursor: wait; }
.contact-form :focus-visible, .menu-toggle:focus-visible, .mobile-menu a:focus-visible { outline: 2px solid #ff5278; outline-offset: 4px; }
.form-status { min-height: 1.5rem; margin-top: 1rem; padding: .8rem 1rem; color: rgba(255,255,255,.9); font-size: .9rem; line-height: 1.55; letter-spacing: .02em; }
.form-status--success { border-left: 3px solid #6ed6a0; background: rgba(110,214,160,.1); }
.form-status--error { border-left: 3px solid #ff748f; background: rgba(255,116,143,.1); }
.htmx-indicator { display: none; }
.htmx-request .htmx-indicator, .htmx-request.htmx-indicator { display: block; }
#form-loading { margin-top: .8rem; color: #fff; font-size: .82rem; }

.site-footer { padding-top: var(--space-6); color: rgba(255,255,255,.7); background: #07080a; border-top: 1px solid rgba(255,255,255,.08); }
.footer-top { display: grid; grid-template-columns: 2fr 1fr 1fr 1.2fr; gap: 2.5rem; padding-bottom: var(--space-6); }
.brand--footer { color: var(--epsilon-white); }
.brand--footer .brand-image { width: 330px; max-width: 100%; height: auto; }
.footer-brand > p { margin-top: .7rem; color: var(--epsilon-muted); font-size: var(--type-label); font-weight: 600; letter-spacing: .14em; }
.footer-group { display: flex; flex-direction: column; align-items: flex-start; gap: .7rem; }
.footer-group > span { margin-bottom: .45rem; color: #73767c; font-size: var(--type-label); font-weight: 600; letter-spacing: .12em; }
.footer-group a, .footer-group p { font-size: var(--type-ui); line-height: 1.65; }
.footer-group a { transition: color 180ms ease; }
.footer-group a:hover { color: var(--epsilon-white); }
.footer-parent .group-logo { display: block; width: 220px; max-width: 100%; height: auto; }
.footer-bottom { display: flex; align-items: center; justify-content: space-between; padding-block: 1rem; border-top: 1px solid rgba(255,255,255,.1); color: #7a7d83; font-size: var(--type-label); font-weight: 600; letter-spacing: .1em; }
.footer-bottom a { color: rgba(255,255,255,.5); transition: color 180ms ease; }
.footer-bottom a:hover { color: var(--epsilon-white); }

.reveal { opacity: 1; transform: none; }
html.js .reveal:not(.is-visible) { opacity: 0; transform: translateY(24px); transition: opacity 750ms var(--ease), transform 750ms var(--ease); }
html.js .reveal.is-visible { opacity: 1; transform: translateY(0); }

/* Interactive layer --------------------------------------------------------- */
.scroll-progress { position: absolute; right: 0; bottom: -1px; left: 0; height: 2px; pointer-events: none; background: linear-gradient(90deg, var(--epsilon-red), #ff3b6b); box-shadow: 0 0 10px rgba(193,12,58,.55); transform: scaleX(var(--progress, 0)); transform-origin: left; }
.desktop-nav a.is-active { color: var(--epsilon-white); }
.desktop-nav a.is-active::after { transform: scaleX(1); transform-origin: left; }
.mobile-menu a.is-active { color: #ff5278; }
.button--primary, .header-cta { translate: var(--tx, 0) var(--ty, 0); transition: background 180ms ease, transform 180ms ease, box-shadow 180ms ease, border-color 180ms ease, translate 160ms ease-out; }

.system-list li { position: relative; padding: 0; }
.system-list li:last-child { padding-left: 0; }
.system-item { display: flex; width: 100%; flex-direction: column; gap: .3rem; padding: .7rem .5rem .7rem 0; border: 0; color: rgba(255,255,255,.5); background: transparent; font: inherit; letter-spacing: inherit; text-align: left; cursor: pointer; transition: color 250ms ease; }
.system-list li:last-child .system-item { padding-left: .6rem; }
.system-item::before { position: absolute; content: ""; top: -1px; right: .5rem; left: 0; height: 2px; background: var(--epsilon-red-bright); box-shadow: 0 0 10px rgba(193,12,58,.7); transform: scaleX(0); transform-origin: left; transition: transform 450ms var(--ease); }
.system-list li:last-child .system-item::before { left: .6rem; right: 0; }
.system-item:hover, .system-item.is-active { color: var(--epsilon-white); }
.system-item.is-active::before { transform: scaleX(1); }
.system-item:focus-visible { outline: 2px solid #ff5278; outline-offset: 2px; }
.node--four { left: 13%; top: 50%; }
.node { transition: background 300ms ease, box-shadow 300ms ease; }
.node.is-active { background: var(--epsilon-red-bright); box-shadow: 0 0 0 5px rgba(193,12,58,.16), 0 0 18px rgba(193,12,58,.8); }
.system-probe { position: absolute; z-index: 1; top: 0; left: 0; width: 44px; height: 44px; margin: -22px 0 0 -22px; border: 1px solid rgba(193,12,58,.6); border-radius: 50%; pointer-events: none; transform: translate(var(--x, 50%), var(--y, 50%)); transition: transform 900ms var(--ease); }
.system-probe::after { position: absolute; content: ""; inset: -1px; border: 1px solid rgba(255,82,120,.5); border-radius: 50%; animation: probe-pulse 2.2s ease-out infinite; }
@keyframes probe-pulse { from { opacity: .9; transform: scale(1); } to { opacity: 0; transform: scale(2.1); } }
.system-index b { font: inherit; }

.service-card::before { position: absolute; content: ""; inset: 0; pointer-events: none; background: radial-gradient(240px circle at var(--mx, 50%) var(--my, 50%), rgba(193,12,58,.1), transparent 65%); opacity: 0; transition: opacity 260ms ease; }
.service-card:hover::before { opacity: 1; }

.step-top i::before { position: absolute; content: ""; inset: 0; background: var(--epsilon-red-bright); transform: scaleX(0); transform-origin: left; transition: transform 700ms var(--ease); }
.method-steps li.is-reached .step-top i::before { transform: scaleX(1); }
.method-steps li.is-reached .step-top i::after { background: var(--epsilon-red-bright); box-shadow: 0 0 12px rgba(193,12,58,.8); }
.step-top i::after { transition: background 300ms ease 500ms, box-shadow 300ms ease 500ms; }
.method-steps li:nth-child(2) .step-top i::before { transition-delay: 120ms; }
.method-steps li:nth-child(3) .step-top i::before { transition-delay: 240ms; }
.method-steps li:nth-child(4) .step-top i::before { transition-delay: 360ms; }
.method-steps li:nth-child(5) .step-top i::before { transition-delay: 480ms; }
html.js .method-steps li h3 { transition: color 400ms ease; }
html.js .method-steps li:not(.is-reached) h3 { color: rgba(255,255,255,.55); }

.carousel-controls, .clamp-toggle, .mobile-cta { display: none; }

@media (max-width: 1180px) {
  :root { --shell: min(100% - 64px, 1180px); }
  .hero-inner { grid-template-columns: minmax(0, 1.1fr) minmax(270px, .8fr); gap: 4vw; }
  .services-grid { grid-template-columns: repeat(2, 1fr); }
  .method-heading { grid-template-columns: .7fr 2fr 1fr; }
}

@media (min-width: 901px) and (max-width: 1180px) {
  .contact-layout { grid-template-columns: minmax(0, .9fr) minmax(0, 1.1fr); gap: clamp(2.5rem, 5vw, 3.5rem); }
  .contact-form { padding-top: 1.5rem; }
  .contact-form .form-row { grid-template-columns: 1fr; gap: 0; }
}

@media (min-width: 901px) and (max-width: 1023px) {
  .hero-actions { align-items: flex-start; flex-direction: column; gap: .65rem; margin-top: 1.6rem; }
  .hero .button { min-width: min(100%, 300px); }
}

@media (min-width: 901px) and (max-width: 1100px) {
  .footer-top { grid-template-columns: 2fr 1fr 1fr; }
  .footer-parent { grid-column: 2 / -1; }
}

@media (min-width: 901px) and (max-width: 1040px) {
  .founders-grid { grid-template-columns: 1fr; }
  .founder-card { grid-template-columns: minmax(220px, 40%) 1fr; grid-template-rows: 1fr; min-height: 320px; }
  .founder-visual { min-height: 320px; aspect-ratio: auto; }
  .founder-body { min-height: 320px; }
}

@media (max-width: 900px) {
  :root { --header-height: 80px; --shell: min(100% - 44px, 820px); --type-hero: clamp(2.45rem, 5.4vw, 3rem); --type-section: clamp(1.9rem, 4.5vw, 2.4rem); --space-8: 4.5rem; }
  .site-header.is-scrolled { height: 68px; }
  .brand-image, .site-header.is-scrolled .brand-image { height: 44px; }
  .header-inner { gap: 1rem; }
  .desktop-nav, .header-cta { display: none; }
  .menu-toggle { display: block; }
  .mobile-menu { position: fixed; z-index: 20; inset: var(--header-height) 0 auto; display: flex; flex-direction: column; gap: 0; max-height: calc(100dvh - var(--header-height)); overflow-y: auto; padding: 1rem 22px 2rem; visibility: hidden; opacity: 0; pointer-events: none; background: var(--epsilon-black); border-bottom: 1px solid var(--line-dark); box-shadow: 0 24px 48px rgba(0,0,0,.45); transform: translateY(-12px); transition: opacity 220ms ease, transform 220ms ease, visibility 220ms ease; }
  .mobile-menu.is-open { visibility: visible; opacity: 1; pointer-events: auto; transform: translateY(0); }
  .mobile-menu a { min-height: 48px; padding: 1rem 0; border-bottom: 1px solid rgba(255,255,255,.2); }
  .hero-inner { grid-template-columns: 1fr; align-content: center; gap: 2rem; min-height: 0; padding-top: 8.25rem; padding-bottom: 4.5rem; }
  .hero-system { width: min(100%, 560px); margin: 0 auto; }
  .system-core { height: 230px; }
  .hero-bottom { display: none; }
  .hero-coordinate--side { display: none; }
  .section-intro, .method-heading { grid-template-columns: 1fr; gap: 2rem; }
  .section-intro { margin-bottom: 3.5rem; }
  .services { padding-top: 4.5rem; }
  .services > .shell, .team > .shell { max-width: 820px; }
  .services .section-intro { margin-bottom: 2.5rem; }
  .team { padding-block: 4.5rem; }
  .section-intro--team { margin-bottom: 2.25rem; }
  .method-steps { grid-template-columns: repeat(2, 1fr); row-gap: 3rem; }
  .method-steps li:last-child { grid-column: span 2; max-width: 50%; }
  .founders-grid { grid-template-columns: 1fr; }
  .founder-card { grid-template-columns: minmax(200px, 40%) 1fr; grid-template-rows: 1fr; min-height: 300px; }
  .founder-visual { min-height: 300px; aspect-ratio: auto; }
  .founder-body { min-height: 300px; }
  .contact-layout { grid-template-columns: 1fr; gap: 3rem; }
  .contact-form { padding-top: 0; }
  .footer-top { grid-template-columns: 2fr 1fr 1fr; }
  .footer-parent { grid-column: 2 / -1; }
}

@media (max-width: 620px) {
  :root { --header-height: 72px; --shell: calc(100% - 32px); --type-hero: clamp(1.9rem, 8.5vw, 2.7rem); --type-section: clamp(1.65rem, 6.5vw, 2.1rem); --type-card: clamp(1.05rem, 5vw, 1.2rem); --space-8: 4rem; }
  .site-header, .site-header.is-scrolled { height: var(--header-height); }
  .brand-image, .site-header.is-scrolled .brand-image { height: 36px; }
  .header-actions { gap: .9rem; }
  .menu-toggle { width: 48px; height: 48px; }
  .language-switch { font-size: var(--type-label); }
  .hero { min-height: 0; }
  .hero-inner { padding-top: 7.5rem; padding-bottom: 3.75rem; gap: 1.8rem; }
  .hero-coordinate--top { top: 6.4rem; right: 1rem; font-size: .55rem; }
  .hero h1 { max-width: 520px; font-size: var(--type-hero); line-height: 1.04; }
  .hero h1 br { display: none; }
  .eyebrow { margin-bottom: 1rem; font-size: var(--type-label); letter-spacing: .13em; }
  .hero-lede { margin-top: 1rem; font-size: .95rem; line-height: 1.65; }
  .hero-actions { align-items: stretch; flex-direction: column; gap: .5rem; margin-top: 1.3rem; }
  .button { width: 100%; min-width: 0; }
  .text-link { align-self: flex-start; }
  .hero-system { max-width: none; margin-top: 0; padding: .8rem .8rem .4rem; }
  .system-core { height: 170px; }
  .system-list li { font-size: var(--type-label); }
  .system-list { grid-template-columns: repeat(2, 1fr); }
  .system-list li:nth-child(2) { border-right: 0; }
  .system-list li:nth-child(-n+2) { border-bottom: 1px solid rgba(255,255,255,.12); }
  .intro-copy h2, .method-heading h2, .contact h2 { font-size: var(--type-section); }
  .services { padding-top: 3.25rem; }
  .team { padding-block: 3.25rem; }
  .services .section-intro { margin-bottom: 1.75rem; }
  .section-intro--team { margin-bottom: 1.5rem; }
  .services-grid { grid-template-columns: 1fr; }
  .service-card { min-height: 200px; padding: 1.15rem; }
  .method-steps { grid-template-columns: 1fr; }
  .method-steps li, .method-steps li:last-child { grid-column: auto; max-width: none; min-height: auto; }
  .founder-card { grid-template-columns: 1fr; grid-template-rows: auto 1fr; }
  .founder-visual { min-height: 0; aspect-ratio: 4 / 3; }
  .founder-body { min-height: 260px; padding: 1.2rem; }
  .form-row { grid-template-columns: 1fr; gap: 0; }
  .contact-form label { margin-bottom: 1.1rem; }
  .contact-form input, .contact-form textarea { font-size: 16px; }
  .contact-meta { flex-wrap: wrap; gap: 1.5rem; }
  .footer-top { grid-template-columns: 1fr 1fr; gap: 2rem 1.25rem; }
  .footer-brand { grid-column: 1 / -1; }
  .brand--footer .brand-image { width: 280px; }
  .footer-parent { grid-column: auto; }
  .footer-bottom { align-items: flex-start; flex-direction: column; gap: 1rem; }
  .footer-bottom span:nth-child(2) { display: none; }
}

/* Phones: shorter page — swipeable cards, compact timeline, collapsible intros. */
@media (max-width: 620px) {
  .hero-coordinate { display: none; }
  .hero-inner { padding-top: 6.25rem; padding-bottom: 2.5rem; gap: 1.4rem; }
  .hero-system { padding: .6rem .8rem .1rem; }
  .system-topline { padding-bottom: .5rem; }
  .system-core { display: none; }

  .section { padding-block: 3rem; }
  .services { padding-top: 3rem; }
  .services .section-intro, .section-intro--team { gap: .9rem; margin-bottom: 1.5rem; }
  .section-label { padding-top: 0; }
  .intro-copy > p { margin-top: .8rem; font-size: .95rem; line-height: 1.6; }
  .is-clampable:not(.is-expanded) { display: -webkit-box; overflow: hidden; -webkit-box-orient: vertical; -webkit-line-clamp: 3; }
  .clamp-toggle { display: inline-flex; margin-top: .5rem; padding: .35rem 0; border: 0; color: var(--epsilon-red); background: transparent; font-size: var(--type-label); font-weight: 600; letter-spacing: .12em; text-transform: uppercase; cursor: pointer; }
  .clamp-toggle:focus-visible { outline: 2px solid #ff5278; outline-offset: 3px; }

  [data-carousel] { display: grid; grid-template-columns: none; grid-auto-flow: column; gap: .75rem; margin-inline: -16px; padding: 0 16px 6px; overflow-x: auto; overscroll-behavior-x: contain; border: 0; scroll-snap-type: x mandatory; scroll-padding-inline: 16px; scrollbar-width: none; -webkit-overflow-scrolling: touch; }
  [data-carousel]::-webkit-scrollbar { display: none; }
  [data-carousel] > * { scroll-snap-align: start; border: 1px solid var(--line-light); }
  html.js [data-carousel] > .reveal:not(.is-visible) { opacity: 1; transform: none; }
  .services-grid[data-carousel] { grid-auto-columns: 84%; }
  .founders-grid[data-carousel] { grid-auto-columns: 86%; }
  .service-card { min-height: 0; padding: 1.15rem; background: var(--epsilon-white); }
  .service-card:hover { transform: none; box-shadow: none; }
  .carousel-controls { display: flex; align-items: center; gap: .75rem; margin-top: 1rem; }
  .carousel-dots { display: flex; flex: 1; align-items: center; gap: .4rem; }
  .carousel-dot { width: 7px; height: 7px; padding: 0; border: 0; background: rgba(11,12,14,.2); cursor: pointer; transition: width 300ms var(--ease), background 300ms ease; }
  .carousel-dot.is-active { width: 22px; background: var(--epsilon-red); }
  .carousel-count { color: #5e6166; font-size: var(--type-label); font-weight: 600; letter-spacing: .12em; font-variant-numeric: tabular-nums; }
  .carousel-arrow { display: inline-flex; align-items: center; justify-content: center; width: 40px; height: 40px; padding: 0; border: 1px solid var(--line-light); color: var(--epsilon-black); background: transparent; cursor: pointer; transition: border-color 180ms ease, color 180ms ease, opacity 180ms ease; }
  .carousel-arrow:not(:disabled):active { border-color: var(--epsilon-red); color: var(--epsilon-red); }
  .carousel-arrow:disabled { opacity: .3; cursor: default; }
  .carousel-dot:focus-visible, .carousel-arrow:focus-visible { outline: 2px solid #ff5278; outline-offset: 3px; }

  .method { margin-top: 3rem; padding-block: 3rem; }
  .method-heading { gap: .9rem; }
  .method-heading > p { font-size: .88rem; }
  .method-steps { row-gap: 0; margin-top: 2rem; }
  .method-steps li, .method-steps li:last-child { display: grid; grid-template-columns: 1.6rem 1fr; column-gap: .9rem; padding: 0 0 1.3rem; }
  .method-steps .step-top { grid-row: 1 / span 2; flex-direction: column; align-self: stretch; }
  .method-steps .step-top i { width: 1px; height: auto; margin: .45rem 0 -1.3rem; }
  .method-steps .step-top i::before { transform: scaleY(0); transform-origin: top; }
  .method-steps li.is-reached .step-top i::before { transform: scaleY(1); }
  .method-steps .step-top i::after { display: none; }
  .method-steps li:last-child .step-top i { display: none; }
  .method-steps h3 { margin-top: -.2rem; font-size: 1.05rem; }
  .method-steps p { max-width: none; margin-top: .3rem; font-size: .88rem; line-height: 1.55; }

  .team { padding-block: 3rem; }
  .founder-card { grid-template-columns: 1fr; grid-template-rows: auto 1fr; min-height: 0; }
  .founder-visual { min-height: 0; aspect-ratio: 16 / 11; }
  .founder-body { min-height: 0; padding: 1.1rem; }
  .founder-body h3 { margin-top: .6rem; font-size: 1.2rem; }
  .founder-statement { margin-top: 1.5rem; padding-top: 1.25rem; }
  .founder-statement p { font-size: .95rem; }

  .contact h2 { margin-top: 1.25rem; }
  .contact-meta { margin-top: 1.75rem; }

  .site-footer { padding-top: 2.25rem; }
  .footer-top { gap: 1.5rem 1rem; padding-bottom: 2rem; }
  .footer-top > .footer-group:nth-child(2) { display: none; }
  .brand--footer .brand-image { width: 280px; }

  .mobile-cta { position: fixed; z-index: 90; right: 12px; bottom: calc(12px + env(safe-area-inset-bottom)); left: 12px; display: flex; align-items: center; justify-content: space-between; min-height: 52px; padding: .85rem 1rem; color: var(--epsilon-white); background: linear-gradient(110deg, #a5002d, #bd0a39); box-shadow: 0 14px 34px rgba(0,0,0,.35), 0 6px 18px rgba(165,0,45,.3); font-size: var(--type-ui); font-weight: 600; letter-spacing: .08em; text-transform: uppercase; opacity: 0; pointer-events: none; transform: translateY(140%); transition: transform 350ms var(--ease), opacity 250ms ease; }
  .mobile-cta.is-visible { opacity: 1; pointer-events: auto; transform: translateY(0); }
  body.menu-open .mobile-cta { opacity: 0; pointer-events: none; transform: translateY(140%); }
  .mobile-cta:focus-visible { outline: 2px solid #ff5278; outline-offset: 3px; }
}

@media (max-width: 380px) {
  .brand-image, .site-header.is-scrolled .brand-image { height: 30px; }
  .header-actions { gap: .7rem; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto !important; transition-duration: 0.01ms !important; animation-duration: 0.01ms !important; animation-iteration-count: 1 !important; }
  .reveal { opacity: 1; transform: none; }
  .hero-copy, .hero-system { animation: none; }
  .system-probe::after { animation: none; }
}