:root {
  --ink: #071b2d;
  --ink-soft: #355064;
  --navy: #041522;
  --navy-2: #09293b;
  --teal: #0d8983;
  --teal-dark: #086b6b;
  --aqua: #74e8df;
  --mist: #edf6f5;
  --paper: #ffffff;
  --line: rgba(7, 27, 45, .12);
  --shadow: 0 24px 80px rgba(5, 27, 43, .14);
  --radius: 28px;
  --container: 1240px;
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 132px; }
body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: Montserrat, Inter, "Segoe UI", Arial, sans-serif;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}
body.menu-open, body.modal-open { overflow: hidden; }
img { display: block; max-width: 100%; }
a { color: inherit; }
button, a { -webkit-tap-highlight-color: transparent; }
button { font: inherit; }
.container { width: min(calc(100% - 48px), var(--container)); margin-inline: auto; }
.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; z-index: 1000; top: 10px; left: 10px; padding: 12px 16px; color: #fff; background: var(--navy); border-radius: 10px; transform: translateY(-180%); }
.skip-link:focus { transform: translateY(0); }

h1, h2, h3, p { margin-top: 0; }
h1, h2, h3 { letter-spacing: -.04em; text-wrap: balance; }
h1 { max-width: 900px; margin-bottom: 24px; font-size: clamp(48px, 6.1vw, 92px); line-height: .98; font-weight: 760; }
h2 { margin-bottom: 24px; font-size: clamp(38px, 4.3vw, 66px); line-height: 1.02; font-weight: 740; }
h3 { font-size: clamp(24px, 2.2vw, 34px); line-height: 1.08; }
p { color: var(--ink-soft); }
.eyebrow { margin: 0 0 16px; color: var(--teal-dark); font-size: 12px; font-weight: 800; letter-spacing: .16em; text-transform: uppercase; }
.eyebrow-light { color: var(--aqua); }
.section { padding: clamp(88px, 10vw, 148px) 0; }
.section-heading { margin-bottom: 54px; }
.compact-heading { display: flex; align-items: end; justify-content: space-between; gap: 36px; }
.compact-heading h2 { max-width: 760px; margin-bottom: 0; }
.split-heading { display: grid; grid-template-columns: minmax(0, 1.45fr) minmax(280px, .55fr); align-items: end; gap: 72px; }
.split-heading h2 { max-width: 820px; margin-bottom: 0; }
.split-heading > p { max-width: 480px; margin-bottom: 6px; font-size: 17px; line-height: 1.7; }
.button-row { display: flex; flex-wrap: wrap; gap: 12px; }
.button { min-height: 54px; display: inline-flex; align-items: center; justify-content: center; padding: 14px 22px; border: 1px solid transparent; border-radius: 999px; font-size: 14px; font-weight: 800; text-decoration: none; transition: transform .2s ease, background .2s ease, color .2s ease, border-color .2s ease; }
.button:hover { transform: translateY(-2px); }
.button-primary { color: #fff; background: var(--teal); box-shadow: 0 14px 38px rgba(13, 137, 131, .24); }
.button-primary:hover { background: var(--teal-dark); }
.button-secondary { color: #fff; background: var(--ink); }
.button-light { color: var(--ink); background: #fff; }
.button-ghost { color: #fff; border-color: rgba(255, 255, 255, .42); background: rgba(3, 18, 30, .24); backdrop-filter: blur(10px); }
.button-outline { color: var(--ink); border-color: rgba(7, 27, 45, .28); }
.text-link { display: inline-flex; align-items: center; gap: 10px; color: var(--ink); font-size: 14px; font-weight: 800; text-decoration: none; }
.text-link span { color: var(--teal); transition: transform .2s ease; }
.text-link:hover span { transform: translateX(4px); }

/* Entry orientation */
.entry-overlay {
  position: fixed;
  z-index: 900;
  inset: 0;
  display: grid;
  place-items: center;
  padding: 24px;
  background: rgba(2, 14, 24, .76);
  backdrop-filter: blur(18px);
}
.entry-overlay[hidden] { display: none; }
.entry-modal {
  width: min(1120px, 100%);
  max-height: min(790px, calc(100svh - 48px));
  display: grid;
  grid-template-columns: minmax(420px, .92fr) minmax(420px, 1.08fr);
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, .22);
  border-radius: 34px;
  background: #fff;
  box-shadow: 0 44px 140px rgba(0, 0, 0, .4);
}
.entry-panel { overflow-y: auto; padding: clamp(34px, 5vw, 68px); }
.entry-logo { width: 148px; margin-bottom: 44px; }
.entry-panel h2 { max-width: 530px; margin-bottom: 16px; font-size: clamp(36px, 4.2vw, 58px); }
.entry-intro { max-width: 570px; margin-bottom: 30px; font-size: 17px; line-height: 1.65; }
.entry-options { display: grid; gap: 10px; }
.entry-option { min-height: 72px; display: grid; align-content: center; gap: 3px; padding: 15px 18px; border: 1px solid var(--line); border-radius: 17px; color: var(--ink); background: #fff; text-decoration: none; transition: transform .2s ease, border-color .2s ease, background .2s ease; }
.entry-option:hover { transform: translateX(4px); border-color: rgba(13, 137, 131, .6); background: var(--mist); }
.entry-option span { font-size: 15px; font-weight: 800; }
.entry-option small { color: #657887; font-size: 12px; }
.entry-option-primary { color: #fff; border-color: var(--teal); background: var(--teal); }
.entry-option-primary small { color: rgba(255, 255, 255, .75); }
.entry-option-primary:hover { color: #fff; background: var(--teal-dark); }
.entry-continue { margin-top: 20px; padding: 8px 0; border: 0; color: var(--ink); background: transparent; font-weight: 800; text-decoration: underline; text-decoration-color: rgba(13, 137, 131, .4); text-underline-offset: 5px; cursor: pointer; }
.entry-visual { position: relative; min-height: 640px; background: linear-gradient(180deg, rgba(3, 18, 30, .02), rgba(3, 18, 30, .62)), url("images/popup-virtual-twin.webp") center / cover no-repeat; }
.entry-visual::after { content: ""; position: absolute; inset: 0; background: linear-gradient(90deg, rgba(5, 24, 38, .18), transparent 42%); }
.entry-visual-label { position: absolute; z-index: 1; left: 34px; right: 34px; bottom: 34px; padding: 16px 20px; border: 1px solid rgba(255, 255, 255, .2); border-radius: 18px; color: #fff; background: rgba(3, 18, 30, .5); backdrop-filter: blur(12px); font-size: 14px; font-weight: 700; }

/* Dual brand header */
.site-header { position: sticky; z-index: 200; top: 0; background: #fff; box-shadow: 0 1px 0 rgba(7, 27, 45, .1); transition: box-shadow .2s ease; }
.site-header.is-scrolled { box-shadow: 0 14px 44px rgba(7, 27, 45, .12); }
.brand-row { border-bottom: 1px solid rgba(7, 27, 45, .08); }
.brand-row-twinme { border-bottom: 0; background: #f8fbfb; }
.header-inner { width: min(calc(100% - 48px), 1440px); min-height: 63px; display: flex; align-items: center; gap: 28px; margin-inline: auto; }
.twinme-inner { min-height: 52px; }
.brand-link { flex: 0 0 auto; display: inline-flex; align-items: center; }
.brand-link-biotwin img { width: 128px; }
.brand-link-twinme img { width: 103px; max-height: 31px; object-fit: contain; }
.desktop-nav { display: flex; align-items: center; gap: clamp(15px, 1.55vw, 26px); }
.desktop-nav a, .utility-nav > a { position: relative; color: #213d50; font-size: 12px; font-weight: 720; text-decoration: none; white-space: nowrap; }
.desktop-nav a::after { content: ""; position: absolute; left: 0; right: 100%; bottom: -8px; height: 2px; background: var(--teal); transition: right .2s ease; }
.desktop-nav a:hover::after { right: 0; }
.nav-highlight { color: var(--teal-dark) !important; }
.biotwin-nav { margin-left: auto; }
.twinme-nav { margin-left: auto; }
.utility-nav { display: flex; align-items: center; gap: 16px; margin-left: auto; }
.utility-primary { padding: 8px 14px; border-radius: 999px; color: #fff !important; background: var(--teal); }
.language-picker { position: relative; }
.language-picker > button { min-height: 38px; padding: 7px 10px; border: 1px solid var(--line); border-radius: 10px; color: var(--ink); background: #fff; font-size: 12px; font-weight: 800; cursor: pointer; }
.language-menu { position: absolute; top: calc(100% + 8px); right: 0; min-width: 150px; padding: 7px; border: 1px solid var(--line); border-radius: 13px; background: #fff; box-shadow: var(--shadow); }
.language-menu a { display: flex; justify-content: space-between; gap: 14px; padding: 9px 10px; border-radius: 8px; font-size: 12px; font-weight: 800; text-decoration: none; }
.language-menu a:hover { background: var(--mist); }
.language-menu small { color: #718290; font-weight: 500; }
.menu-toggle { display: none; width: 46px; height: 44px; margin-left: auto; padding: 11px; border: 1px solid var(--line); border-radius: 12px; background: #fff; cursor: pointer; }
.menu-toggle > span:not(.sr-only) { display: block; height: 2px; margin: 4px 0; border-radius: 5px; background: var(--ink); transition: transform .2s ease, opacity .2s ease; }
.menu-toggle[aria-expanded="true"] > span:nth-child(1) { transform: translateY(6px) rotate(45deg); }
.menu-toggle[aria-expanded="true"] > span:nth-child(2) { opacity: 0; }
.menu-toggle[aria-expanded="true"] > span:nth-child(3) { transform: translateY(-6px) rotate(-45deg); }
.mobile-menu { position: fixed; z-index: 190; inset: 116px 0 0; overflow-y: auto; padding: 30px max(24px, calc((100vw - 1000px) / 2)); background: #fff; }
.mobile-menu[hidden] { display: none; }
.mobile-menu-section { display: grid; gap: 2px; padding: 0 0 28px; }
.mobile-menu-section + .mobile-menu-section { padding-top: 28px; border-top: 1px solid var(--line); }
.mobile-menu-section strong { margin-bottom: 8px; color: var(--teal-dark); font-size: 12px; letter-spacing: .14em; text-transform: uppercase; }
.mobile-menu-section a { min-height: 46px; display: flex; align-items: center; border-bottom: 1px solid rgba(7, 27, 45, .06); color: var(--ink); font-size: 16px; font-weight: 700; text-decoration: none; }

/* Hero */
.hero { position: relative; min-height: calc(100svh - 116px); display: flex; align-items: center; overflow: hidden; color: #fff; background: var(--navy); }
.hero-image { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; object-position: 66% center; }
.hero-shade { position: absolute; inset: 0; background: linear-gradient(90deg, rgba(3, 17, 28, .94) 0%, rgba(3, 17, 28, .75) 44%, rgba(3, 17, 28, .08) 78%), linear-gradient(0deg, rgba(3, 17, 28, .46), transparent 42%); }
.hero-content { position: relative; z-index: 2; padding-top: 78px; padding-bottom: 126px; }
.hero h1 { max-width: 850px; }
.hero-lead { max-width: 650px; margin-bottom: 30px; color: rgba(255, 255, 255, .79); font-size: clamp(17px, 1.6vw, 22px); line-height: 1.6; }
.hero-markers { display: flex; flex-wrap: wrap; gap: 9px; margin-top: 42px; }
.hero-markers span { padding: 9px 13px; border: 1px solid rgba(255, 255, 255, .2); border-radius: 999px; color: rgba(255, 255, 255, .85); background: rgba(4, 21, 34, .28); backdrop-filter: blur(10px); font-size: 12px; font-weight: 700; }
.scroll-cue { position: absolute; z-index: 2; left: 50%; bottom: 26px; display: inline-flex; align-items: center; gap: 10px; color: rgba(255, 255, 255, .7); font-size: 11px; font-weight: 800; letter-spacing: .08em; text-decoration: none; text-transform: uppercase; transform: translateX(-50%); }

/* Three visual story cards */
.section-intro { background: #fff; }
.story-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 20px; }
.story-card { position: relative; min-height: 590px; overflow: hidden; border-radius: var(--radius); background: var(--navy); box-shadow: var(--shadow); }
.story-card img { width: 100%; height: 100%; object-fit: cover; transition: transform .7s ease; }
.story-card:hover img { transform: scale(1.035); }
.story-card::after { content: ""; position: absolute; inset: 0; background: linear-gradient(0deg, rgba(3, 17, 28, .94) 0%, rgba(3, 17, 28, .08) 66%); }
.story-copy { position: absolute; z-index: 2; left: 26px; right: 26px; bottom: 25px; color: #fff; }
.story-copy > span { color: var(--aqua); font-size: 12px; font-weight: 850; }
.story-copy h3 { margin: 8px 0 9px; font-size: clamp(25px, 2.4vw, 34px); }
.story-copy p { margin-bottom: 0; color: rgba(255, 255, 255, .7); font-size: 14px; }
.story-copy a { display: inline-flex; align-items: center; gap: 8px; margin-top: 16px; color: #fff; font-size: 12px; font-weight: 800; text-decoration: none; }
.story-copy a b { color: var(--aqua); font-size: 15px; transition: transform .2s ease; }
.story-copy a:hover b { transform: translateX(4px); }

/* Product proof */
.section-results { background: var(--mist); }
.proof-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 18px; align-items: stretch; }
.proof-card { overflow: hidden; border: 1px solid rgba(7, 27, 45, .09); border-radius: 24px; background: #fff; box-shadow: 0 20px 70px rgba(7, 27, 45, .09); }
.proof-image { position: relative; height: 310px; display: grid; place-items: center; overflow: hidden; padding: 18px; background: #f8fbfb; }
.proof-image-dark { background: #dfeeed; }
.proof-image img { width: 100%; height: 100%; object-fit: contain; }
.proof-copy { padding: 24px 25px 28px; }
.proof-copy h3 { margin: 13px 0 8px; font-size: 27px; }
.proof-copy p { margin-bottom: 0; font-size: 14px; }
.demo-label, .status-pill { display: inline-flex; padding: 6px 9px; border-radius: 999px; color: #3b6566; background: #e1f2f0; font-size: 10px; font-weight: 850; letter-spacing: .08em; text-transform: uppercase; }
.demo-overlay { position: absolute; z-index: 2; top: 12px; left: 12px; display: inline-flex; padding: 7px 10px; border: 1px solid rgba(255,255,255,.5); border-radius: 999px; color: #fff; background: rgba(3,17,28,.78); box-shadow: 0 8px 24px rgba(3,17,28,.16); backdrop-filter: blur(10px); font-size: 10px; font-weight: 850; letter-spacing: .08em; text-transform: uppercase; }
.section-action { display: flex; justify-content: center; margin-top: 42px; }

/* TwinMe experiences */
.section-experiences { color: #fff; background: radial-gradient(circle at 20% 5%, rgba(46, 185, 177, .14), transparent 31%), var(--navy); }
.section-experiences .split-heading > p { color: rgba(255, 255, 255, .65); }
.quiz-banner { position: relative; min-height: 280px; display: flex; align-items: center; overflow: hidden; margin-bottom: 20px; border: 1px solid rgba(255, 255, 255, .14); border-radius: 28px; color: #fff; text-decoration: none; }
.quiz-banner > img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; object-position: 64% center; transition: transform .7s ease; }
.quiz-banner:hover > img { transform: scale(1.025); }
.quiz-shade { position: absolute; inset: 0; background: linear-gradient(90deg, rgba(2, 16, 28, .96), rgba(2, 16, 28, .54) 48%, rgba(2, 16, 28, .08)); }
.quiz-content { position: relative; z-index: 1; display: grid; max-width: 610px; gap: 10px; padding: 42px; }
.quiz-content small { color: var(--aqua); font-size: 11px; font-weight: 850; letter-spacing: .12em; text-transform: uppercase; }
.quiz-content strong { font-size: clamp(34px, 4vw, 58px); line-height: 1; letter-spacing: -.05em; }
.quiz-content > span { width: max-content; margin-top: 5px; padding-bottom: 4px; border-bottom: 1px solid rgba(255, 255, 255, .45); font-size: 13px; font-weight: 800; }
.experience-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 20px; }
.experience-card { overflow: hidden; border: 1px solid rgba(255, 255, 255, .14); border-radius: 28px; background: rgba(255, 255, 255, .055); }
.experience-image { position: relative; height: 360px; overflow: hidden; }
.experience-image::after { content: ""; position: absolute; inset: 0; background: linear-gradient(0deg, rgba(3, 17, 28, .56), transparent 45%); }
.experience-image img { width: 100%; height: 100%; object-fit: cover; transition: transform .7s ease; }
.experience-card:hover img { transform: scale(1.035); }
.experience-image .status-pill { position: absolute; z-index: 2; top: 18px; right: 18px; color: #fff; background: rgba(3, 17, 28, .7); backdrop-filter: blur(10px); }
.experience-copy { padding: 30px 31px 34px; }
.experience-copy h3 { margin: 0 0 13px; font-size: clamp(30px, 3vw, 42px); }
.experience-copy > p:not(.eyebrow) { max-width: 560px; color: rgba(255, 255, 255, .68); }
.experience-copy .text-link { color: #fff; }
.prototype-note { max-width: 760px; margin: 24px auto 0; color: rgba(255, 255, 255, .48); font-size: 11px; text-align: center; }

/* Platform */
.section-platform { background: #fff; }
.platform-layout { display: grid; grid-template-columns: minmax(0, .95fr) minmax(0, 1.05fr); gap: clamp(44px, 7vw, 92px); align-items: center; }
.platform-visual { position: relative; min-height: 680px; overflow: hidden; border-radius: 32px; background: var(--navy); box-shadow: var(--shadow); }
.platform-visual img { width: 100%; height: 100%; object-fit: cover; }
.platform-visual::after { content: ""; position: absolute; inset: 0; background: linear-gradient(0deg, rgba(2, 15, 25, .78), transparent 48%); }
.platform-visual span { position: absolute; z-index: 1; left: 28px; right: 28px; bottom: 26px; color: #fff; font-size: 14px; font-weight: 750; }
.platform-copy h2 { max-width: 650px; }
.platform-steps { display: grid; gap: 0; margin-top: 38px; }
.platform-steps > div { display: grid; grid-template-columns: 46px 1fr; gap: 15px; padding: 18px 0; border-top: 1px solid var(--line); }
.platform-steps > div:last-child { border-bottom: 1px solid var(--line); }
.platform-steps span { color: var(--teal); font-size: 11px; font-weight: 900; }
.platform-steps p { margin: 0; font-size: 14px; }
.platform-steps strong { display: block; margin-bottom: 4px; color: var(--ink); font-size: 16px; }
.inline-links { display: flex; flex-wrap: wrap; gap: 22px; margin-top: 30px; }

/* Evidence */
.section-evidence { color: #fff; background: var(--teal-dark); }
.section-evidence .container { display: grid; grid-template-columns: minmax(0, 1fr) minmax(420px, .85fr); gap: 90px; align-items: center; }
.evidence-heading h2 { max-width: 700px; margin-bottom: 0; }
.evidence-links { border-top: 1px solid rgba(255, 255, 255, .2); }
.evidence-links a { min-height: 76px; display: flex; align-items: center; justify-content: space-between; gap: 20px; border-bottom: 1px solid rgba(255, 255, 255, .2); color: #fff; font-weight: 750; text-decoration: none; }
.evidence-links b { color: var(--aqua); font-size: 22px; transition: transform .2s ease; }
.evidence-links a:hover b { transform: translateX(4px); }

/* Research and media */
.section-research { background: #f6f9f9; }
.research-layout { display: grid; grid-template-columns: minmax(0, .88fr) minmax(0, 1.12fr); gap: 66px; align-items: center; }
.research-copy > p:not(.eyebrow) { max-width: 600px; font-size: 17px; line-height: 1.7; }
.research-copy .button-row { margin-top: 30px; }
.research-visual { height: 600px; overflow: hidden; border-radius: 32px; box-shadow: var(--shadow); }
.research-visual img { width: 100%; height: 100%; object-fit: cover; }
.media-grid { display: grid; grid-template-columns: 1.3fr .7fr; gap: 20px; }
.media-card { position: relative; min-height: 430px; overflow: hidden; border-radius: 26px; color: #fff; background: var(--navy); text-decoration: none; }
.media-card img { width: 100%; height: 100%; object-fit: cover; transition: transform .7s ease; }
.media-card:hover img { transform: scale(1.035); }
.media-card::after { content: ""; position: absolute; inset: 0; background: linear-gradient(0deg, rgba(3, 17, 28, .92), transparent 68%); }
.media-card > span { position: absolute; z-index: 1; left: 26px; right: 26px; bottom: 25px; display: grid; gap: 8px; }
.media-card small { color: var(--aqua); font-size: 11px; font-weight: 850; letter-spacing: .12em; text-transform: uppercase; }
.media-card strong { max-width: 640px; font-size: clamp(22px, 2.4vw, 34px); line-height: 1.08; }

/* Final call and footer */
.final-cta { padding: clamp(76px, 9vw, 124px) 0; color: #fff; background: radial-gradient(circle at 90% 0%, rgba(116, 232, 223, .18), transparent 31%), var(--navy); }
.final-cta-inner { display: grid; grid-template-columns: minmax(0, 1.2fr) minmax(300px, .8fr); align-items: center; gap: 70px; }
.final-cta h2 { max-width: 740px; margin-bottom: 0; }
.final-cta-actions { display: grid; justify-items: start; gap: 15px; }
.final-cta-actions > a:not(.button) { color: rgba(255, 255, 255, .76); font-size: 13px; font-weight: 750; text-underline-offset: 4px; }
.site-footer { padding: 74px 0 28px; color: #fff; background: #020d16; }
.footer-grid { display: grid; grid-template-columns: 1.4fr repeat(3, 1fr); gap: 54px; }
.footer-brand img { width: 142px; margin-bottom: 22px; filter: brightness(0) invert(1); }
.footer-brand p { max-width: 320px; color: rgba(255, 255, 255, .52); font-size: 13px; }
.footer-grid > div:not(.footer-brand) { display: grid; align-content: start; gap: 11px; }
.footer-grid strong { margin-bottom: 8px; color: var(--aqua); font-size: 11px; letter-spacing: .13em; text-transform: uppercase; }
.footer-grid a { color: rgba(255, 255, 255, .68); font-size: 13px; text-decoration: none; }
.footer-grid a:hover { color: #fff; }
.footer-status { margin-top: 56px; padding-top: 28px; border-top: 1px solid rgba(255, 255, 255, .11); }
.footer-status p { max-width: 980px; margin-bottom: 0; color: rgba(255, 255, 255, .46); font-size: 11px; line-height: 1.7; }
.footer-bottom { display: flex; justify-content: space-between; gap: 24px; margin-top: 25px; padding-top: 25px; border-top: 1px solid rgba(255, 255, 255, .11); color: rgba(255, 255, 255, .36); font-size: 11px; }
.footer-bottom span:last-child { display: flex; gap: 18px; }

/* TwinMe starting page */
.start-hero { position: relative; min-height: 670px; display: flex; align-items: end; overflow: hidden; color: #fff; background: var(--navy); }
.start-hero > img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; object-position: 68% center; }
.start-hero-shade { position: absolute; inset: 0; background: linear-gradient(90deg, rgba(2, 15, 25, .96), rgba(2, 15, 25, .62) 54%, rgba(2, 15, 25, .08)), linear-gradient(0deg, rgba(2, 15, 25, .5), transparent 50%); }
.start-hero-content { position: relative; z-index: 1; padding-top: 100px; padding-bottom: 82px; }
.start-hero h1 { max-width: 780px; }
.start-hero p:not(.eyebrow) { max-width: 650px; margin-bottom: 0; color: rgba(255, 255, 255, .74); font-size: 19px; line-height: 1.65; }
.back-link { display: inline-flex; margin-bottom: 72px; color: rgba(255, 255, 255, .72); font-size: 12px; font-weight: 800; text-decoration: none; }
.choice-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 20px; }
.choice-card { overflow: hidden; border: 1px solid var(--line); border-radius: 28px; background: #fff; box-shadow: 0 20px 70px rgba(7, 27, 45, .08); }
.choice-card-quiz { grid-column: 1 / -1; min-height: 280px; display: grid; grid-template-columns: 80px minmax(0, 1fr) auto; align-items: center; gap: 28px; padding: 42px; color: #fff; border-color: rgba(255, 255, 255, .15); background: radial-gradient(circle at 80% 0%, rgba(116, 232, 223, .18), transparent 30%), var(--navy); }
.choice-card-quiz h3 { max-width: 620px; margin-bottom: 12px; font-size: clamp(31px, 3.5vw, 50px); }
.choice-card-quiz p:not(.eyebrow) { max-width: 650px; margin-bottom: 0; color: rgba(255, 255, 255, .65); }
.choice-number { color: var(--aqua); font-size: 52px; font-weight: 300; letter-spacing: -.07em; }
.choice-media { position: relative; height: 360px; overflow: hidden; background: var(--navy); }
.choice-media img { width: 100%; height: 100%; object-fit: cover; }
.choice-media .status-pill { position: absolute; top: 18px; right: 18px; color: #fff; background: rgba(3, 17, 28, .7); backdrop-filter: blur(10px); }
.choice-copy { padding: 30px; }
.choice-copy h3 { margin-bottom: 13px; }
.choice-copy > p:not(.eyebrow) { min-height: 68px; }
.start-outcomes { color: #fff; background: var(--navy); }
.start-outcomes .split-heading > p { color: rgba(255, 255, 255, .62); }
.demo-frame { overflow: hidden; border: 1px solid rgba(255, 255, 255, .15); border-radius: 30px; background: rgba(255, 255, 255, .05); }
.demo-frame-label { min-height: 64px; display: flex; align-items: center; justify-content: space-between; gap: 18px; padding: 14px 22px; color: #fff; background: var(--teal-dark); }
.demo-frame-label strong { font-size: 12px; letter-spacing: .12em; text-transform: uppercase; }
.demo-frame-label span { color: rgba(255, 255, 255, .68); font-size: 12px; }
.demo-gallery { display: grid; grid-template-columns: 1.15fr .9fr .9fr; gap: 1px; background: rgba(255, 255, 255, .12); }
.demo-gallery figure { min-width: 0; margin: 0; background: #f8fbfb; }
.demo-gallery img { width: 100%; height: 360px; padding: 18px; object-fit: contain; }
.demo-gallery figcaption { min-height: 68px; display: flex; align-items: center; gap: 12px; padding: 15px 20px; color: var(--ink); background: #fff; font-size: 14px; font-weight: 800; }
.demo-gallery figcaption span { color: var(--teal); font-size: 11px; }
.demo-source-link { min-height: 72px; display: grid; grid-template-columns: auto 1fr auto; align-items: center; gap: 16px; margin-top: 16px; padding: 14px 18px; border: 1px solid rgba(255,255,255,.15); border-radius: 18px; color: #fff; background: rgba(255,255,255,.055); text-decoration: none; }
.demo-source-link span { padding: 6px 9px; border-radius: 999px; color: #052331; background: var(--aqua); font-size: 9px; font-weight: 850; letter-spacing: .07em; text-transform: uppercase; }
.demo-source-link strong { font-size: 14px; }
.demo-source-link b { color: var(--aqua); font-size: 20px; transition: transform .2s ease; }
.demo-source-link:hover b { transform: translateX(4px); }
.start-method { background: #f3f8f7; }
.method-layout { display: grid; grid-template-columns: minmax(0, .92fr) minmax(0, 1.08fr); gap: 70px; align-items: center; }
.method-copy > p:not(.eyebrow) { max-width: 630px; font-size: 17px; line-height: 1.7; }
.method-image { height: 610px; overflow: hidden; border-radius: 30px; box-shadow: var(--shadow); }
.method-image img { width: 100%; height: 100%; object-fit: cover; }
.start-caution { padding: 84px 0; color: #fff; background: var(--teal-dark); }
.start-caution-inner { display: grid; grid-template-columns: minmax(0, 1fr) minmax(280px, .7fr) auto; gap: 50px; align-items: center; }
.start-caution h2 { margin-bottom: 0; font-size: clamp(34px, 4vw, 56px); }
.start-caution p:not(.eyebrow) { margin-bottom: 0; color: rgba(255, 255, 255, .7); font-size: 14px; line-height: 1.7; }

/* Subtle motion */
.reveal { opacity: 1; transform: none; }
.js .reveal { opacity: 0; transform: translateY(18px); transition: opacity .65s ease, transform .65s ease; }
.js .reveal.is-visible { opacity: 1; transform: translateY(0); }
:focus-visible { outline: 3px solid var(--aqua); outline-offset: 3px; }

@media (max-width: 1240px) {
  .desktop-nav { gap: 13px; }
  .desktop-nav a, .utility-nav > a { font-size: 11px; }
  .brand-link-biotwin img { width: 115px; }
  .header-inner { gap: 18px; }
}

@media (max-width: 1080px) {
  html { scroll-padding-top: 118px; }
  .desktop-nav { display: none; }
  .menu-toggle { display: block; }
  .utility-nav { margin-left: auto; }
  .hero { min-height: calc(100svh - 116px); }
  .story-grid { grid-template-columns: 1fr 1fr; }
  .story-card:last-child { grid-column: 1 / -1; min-height: 480px; }
  .proof-grid { grid-template-columns: 1fr 1fr; }
  .platform-layout, .research-layout { gap: 45px; }
  .section-evidence .container { gap: 50px; }
  .demo-gallery { grid-template-columns: 1fr 1fr; }
  .demo-gallery figure:last-child { grid-column: 1 / -1; }
  .start-caution-inner { grid-template-columns: 1fr 1fr; }
  .start-caution-inner .button { width: max-content; }
}

@media (max-width: 860px) {
  .container { width: min(calc(100% - 36px), var(--container)); }
  .entry-modal { grid-template-columns: 1fr; }
  .entry-visual { min-height: 260px; grid-row: 1; background-position: center 29%; }
  .entry-panel { grid-row: 2; padding: 32px; }
  .entry-logo { width: 125px; margin-bottom: 25px; }
  .entry-panel h2 { font-size: 38px; }
  .entry-intro { margin-bottom: 22px; font-size: 15px; }
  .entry-option { min-height: 65px; }
  .split-heading, .platform-layout, .research-layout, .section-evidence .container, .final-cta-inner { grid-template-columns: 1fr; }
  .split-heading { gap: 24px; }
  .split-heading > p { max-width: 680px; }
  .platform-visual { min-height: 520px; }
  .platform-copy { max-width: 720px; }
  .section-evidence .container { gap: 38px; }
  .research-visual { height: 480px; }
  .media-grid { grid-template-columns: 1fr; }
  .media-card { min-height: 390px; }
  .footer-grid { grid-template-columns: 1.5fr 1fr 1fr; }
  .footer-brand { grid-column: 1 / -1; }
  .choice-card-quiz { grid-template-columns: 60px 1fr; }
  .choice-card-quiz .button { grid-column: 2; justify-self: start; }
  .method-layout { grid-template-columns: 1fr; }
  .method-image { height: 520px; }
  .start-caution-inner { grid-template-columns: 1fr; gap: 24px; }
}

@media (max-width: 700px) {
  h1 { font-size: clamp(42px, 12vw, 64px); }
  h2 { font-size: clamp(34px, 9.5vw, 50px); }
  .section { padding: 78px 0; }
  .header-inner { width: calc(100% - 28px); }
  .brand-row-biotwin .header-inner { min-height: 60px; }
  .twinme-inner { min-height: 50px; }
  .brand-link-biotwin img { width: 112px; }
  .brand-link-twinme img { width: 92px; }
  .utility-nav .language-picker, .utility-nav > a:not(.utility-primary) { display: none; }
  .utility-primary { font-size: 11px !important; }
  .mobile-menu { inset-block-start: 110px; }
  .hero { min-height: calc(100svh - 110px); align-items: end; }
  .hero-image { object-position: 61% center; }
  .hero-shade { background: linear-gradient(0deg, rgba(3, 17, 28, .98) 0%, rgba(3, 17, 28, .84) 50%, rgba(3, 17, 28, .12) 100%); }
  .hero-content { padding-top: 220px; padding-bottom: 88px; }
  .hero-lead { font-size: 16px; }
  .hero .button-row { display: grid; }
  .hero .button { width: 100%; }
  .hero-markers { margin-top: 28px; }
  .scroll-cue { display: none; }
  .compact-heading { display: grid; align-items: start; gap: 22px; }
  .story-grid, .proof-grid, .experience-grid { grid-template-columns: 1fr; }
  .story-card, .story-card:last-child { min-height: 470px; grid-column: auto; }
  .proof-image { height: 270px; }
  .quiz-banner { min-height: 420px; align-items: end; }
  .quiz-banner > img { object-position: 64% center; }
  .quiz-shade { background: linear-gradient(0deg, rgba(2, 16, 28, .98), rgba(2, 16, 28, .32) 75%); }
  .quiz-content { padding: 28px; }
  .experience-image { height: 310px; }
  .experience-copy { padding: 25px; }
  .platform-visual { min-height: 450px; }
  .research-visual { height: 420px; }
  .final-cta-inner { gap: 38px; }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 40px 28px; }
  .footer-brand { grid-column: 1 / -1; }
  .footer-bottom { display: grid; }
  .start-hero { min-height: 650px; }
  .start-hero-shade { background: linear-gradient(0deg, rgba(2, 15, 25, .98), rgba(2, 15, 25, .52) 72%, rgba(2, 15, 25, .1)); }
  .start-hero-content { padding-bottom: 60px; }
  .back-link { margin-bottom: 120px; }
  .start-hero p:not(.eyebrow) { font-size: 16px; }
  .choice-grid { grid-template-columns: 1fr; }
  .choice-card-quiz { grid-column: auto; grid-template-columns: 1fr; padding: 28px; }
  .choice-card-quiz .button { grid-column: auto; justify-self: stretch; }
  .choice-number { font-size: 40px; }
  .demo-gallery { grid-template-columns: 1fr; }
  .demo-gallery figure:last-child { grid-column: auto; }
  .demo-gallery img { height: 300px; }
  .demo-source-link { grid-template-columns: 1fr auto; }
  .demo-source-link span { grid-column: 1 / -1; width: max-content; }
  .method-image { height: 460px; }
}

@media (max-width: 480px) {
  .container { width: calc(100% - 28px); }
  .entry-overlay { padding: 10px; }
  .entry-modal { max-height: calc(100svh - 20px); border-radius: 24px; }
  .entry-visual { min-height: 190px; }
  .entry-visual-label { left: 18px; right: 18px; bottom: 15px; padding: 10px 12px; font-size: 11px; }
  .entry-panel { padding: 24px 20px 25px; }
  .entry-logo { width: 110px; margin-bottom: 16px; }
  .entry-panel .eyebrow { margin-bottom: 8px; }
  .entry-panel h2 { margin-bottom: 10px; font-size: 31px; }
  .entry-intro { margin-bottom: 16px; font-size: 13px; line-height: 1.5; }
  .entry-option { min-height: 58px; padding: 11px 13px; }
  .entry-option span { font-size: 13px; }
  .entry-option small { font-size: 10px; }
  .entry-continue { margin-top: 14px; font-size: 12px; }
  .utility-primary { padding: 7px 10px; }
  .hero-content { padding-top: 180px; }
  .hero-markers span { font-size: 10px; }
  .story-card, .story-card:last-child { min-height: 420px; }
  .proof-image { height: 240px; padding: 12px; }
  .quiz-banner { min-height: 390px; }
  .quiz-content strong { font-size: 38px; }
  .experience-image { height: 270px; }
  .platform-visual, .research-visual { min-height: 0; height: 400px; }
  .media-card { min-height: 350px; }
  .footer-grid { grid-template-columns: 1fr; }
  .footer-brand { grid-column: auto; }
  .choice-media { height: 290px; }
  .demo-frame-label { align-items: start; flex-direction: column; }
  .demo-gallery img { height: 260px; padding: 10px; }
  .demo-source-link { padding: 14px; }
  .method-image { height: 400px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { scroll-behavior: auto !important; animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; }
  .reveal { opacity: 1; transform: none; }
}

@media print {
  .site-header, .entry-overlay, .scroll-cue, .final-cta, .site-footer { display: none !important; }
  .hero { min-height: 680px; }
  .section { padding: 48px 0; }
  .reveal { opacity: 1; transform: none; }
}