/* ─────────────────────────────────────────────────────────────────────────
   cellunova.bio — public homepage.

   Reconstructed from screenshots of the live site (green particle-cell hero,
   black nav, "IM First Framework" section). Copy for the IM First section is
   the real site copy; other figures are drafts. Single committed dark theme.
   ───────────────────────────────────────────────────────────────────────── */

:root {
    --bg:      #070d0a;
    --bg2:     #0a120e;
    --panel:   #0e1a16;
    --panel2:  #13201b;
    --line:    rgba(255,255,255,.07);
    --line2:   rgba(255,255,255,.12);
    --text:    #eaf0f7;
    --muted:   #9aa8bc;
    --dim:     #64748b;
    --brand:   #7dd340;   /* helix / accents */
    --cta:     #6fce35;   /* buttons */
    --cta-hi:  #8fdd5a;
    --brand2:  #4fb3a5;
    --accent:  #d4af37;
    color-scheme: dark;
}

* { box-sizing: border-box; }
body.site {
    margin: 0; background: var(--bg); color: var(--text);
    font-family: 'Inter', system-ui, -apple-system, "Segoe UI", Arial, sans-serif;
    line-height: 1.6; -webkit-font-smoothing: antialiased; overflow-x: hidden;
}
a { color: inherit; text-decoration: none; }
h1, h2, h3 { margin: 0; letter-spacing: -.02em; line-height: 1.06; }
p { margin: 0; }
.wrap { max-width: 1180px; margin: 0 auto; padding: 0 34px; }
.eyebrow { font-size: 12px; font-weight: 800; letter-spacing: .22em; text-transform: uppercase; color: var(--brand); }
.grad { background: linear-gradient(92deg, var(--brand), var(--brand2) 75%); -webkit-background-clip: text; background-clip: text; color: transparent; }

/* ── DNA-helix mark ── */
.brand-mark {
    width: 30px; height: 30px; display: inline-block;
    background-repeat: no-repeat; background-position: center; background-size: contain;
    filter: drop-shadow(0 0 6px rgba(125,211,64,.4));
    background-image: url("data:image/svg+xml,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 100 110'><circle cx='50' cy='55' r='46' fill='none' stroke='%237dd340' stroke-width='8' stroke-linecap='round' stroke-dasharray='118 26' transform='rotate(35 50 55)'/><g stroke='%237dd340' stroke-width='3' stroke-linecap='round' opacity='.5'><line x1='68.2' y1='28' x2='31.8' y2='28'/><line x1='30.8' y1='52' x2='69.2' y2='52'/><line x1='69.8' y1='76' x2='30.2' y2='76'/></g><g fill='%237dd340' opacity='.6'><circle cx='50' cy='12' r='3'/><circle cx='33.2' cy='20' r='4.1'/><circle cx='31.8' cy='28' r='5.2'/><circle cx='47.2' cy='36' r='6'/><circle cx='65.1' cy='44' r='6.6'/><circle cx='69.2' cy='52' r='7'/><circle cx='55.6' cy='60' r='7'/><circle cx='36.9' cy='68' r='6.6'/><circle cx='30.2' cy='76' r='6'/><circle cx='41.7' cy='84' r='5.2'/><circle cx='60.8' cy='92' r='4.1'/><circle cx='70' cy='100' r='3'/></g><g fill='%237dd340'><circle cx='50' cy='12' r='3'/><circle cx='66.8' cy='20' r='4.1'/><circle cx='68.2' cy='28' r='5.2'/><circle cx='52.8' cy='36' r='6'/><circle cx='34.9' cy='44' r='6.6'/><circle cx='30.8' cy='52' r='7'/><circle cx='44.4' cy='60' r='7'/><circle cx='63.1' cy='68' r='6.6'/><circle cx='69.8' cy='76' r='6'/><circle cx='58.3' cy='84' r='5.2'/><circle cx='39.2' cy='92' r='4.1'/><circle cx='30' cy='100' r='3'/></g></svg>");
}
.wordmark {
    font-weight: 800; font-size: 22px; letter-spacing: .005em; line-height: 1;
    background: linear-gradient(180deg, #f6f8fc 0%, #d4dae4 40%, #97a1b2 72%, #e6ebf2 100%);
    -webkit-background-clip: text; background-clip: text; color: transparent; -webkit-text-fill-color: transparent;
}

/* ── Nav (solid black bar, like the live site) ── */
.nav { position: sticky; top: 0; z-index: 50; background: #000; border-bottom: 1px solid rgba(255,255,255,.08); }
.nav-inner { display: flex; align-items: center; gap: 30px; height: 76px; }
.logo { display: inline-flex; align-items: center; gap: 11px; }
.nav .brand-mark { width: 40px; height: 40px; }
.nav-menu { display: flex; align-items: center; gap: 34px; margin-left: 18px; }
.nav-menu a { font-size: 13px; font-weight: 700; letter-spacing: .12em; text-transform: uppercase; color: var(--muted); transition: color .15s; }
.nav-menu a:hover { color: #fff; }
.nav-actions { display: flex; align-items: center; gap: 14px; margin-left: auto; }
.nav-order { padding: 12px 22px; border-radius: 8px; border: 2px solid var(--cta); color: #fff; font-size: 13px; font-weight: 800; letter-spacing: .06em; text-transform: uppercase; transition: background .15s; }
.nav-order:hover { background: rgba(111,206,53,.12); }
.nav-signup { padding: 13px 24px; border-radius: 8px; background: var(--cta); color: #04120a; font-size: 13px; font-weight: 800; letter-spacing: .06em; text-transform: uppercase; transition: background .15s, transform .15s; }
.nav-signup:hover { background: var(--cta-hi); transform: translateY(-1px); }
.nav-burger { display: none; margin-left: auto; background: none; border: 1px solid var(--line2); border-radius: 8px; padding: 8px 10px; color: #fff; cursor: pointer; }
.nav-burger svg { width: 20px; height: 20px; display: block; }

/* ── Buttons ── */
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 9px; padding: 15px 30px; border-radius: 10px; font-weight: 800; font-size: 14px; letter-spacing: .06em; text-transform: uppercase; transition: transform .15s, box-shadow .15s, background .15s, border-color .15s; }
.btn.primary { background: var(--cta); color: #04120a; }
.btn.primary:hover { background: var(--cta-hi); transform: translateY(-2px); box-shadow: 0 16px 40px -14px rgba(111,206,53,.7); }
.btn.outline { border: 2px solid rgba(111,206,53,.6); color: var(--cta); }
.btn.outline:hover { background: rgba(111,206,53,.1); border-color: var(--cta); }

/* ── Hero (full-bleed particle cell) ── */
.hero { position: relative; min-height: 78vh; display: flex; align-items: center; overflow: hidden; background: radial-gradient(1200px 700px at 70% 45%, rgba(20,60,38,.55), var(--bg) 70%); border-bottom: 1px solid var(--line); }
#cellField { position: absolute; inset: 0; z-index: 0; }
.hero-inner { position: relative; z-index: 2; padding: 60px 0; max-width: 940px; }
.hero-rot { font-size: clamp(44px, 8vw, 92px); font-weight: 800; color: #fff; letter-spacing: -.03em; line-height: 1.02; min-height: 2.1em; transition: opacity .4s ease; text-shadow: 0 2px 40px rgba(0,0,0,.5); }
.hero-cta { display: flex; gap: 16px; flex-wrap: wrap; margin-top: 34px; }

/* Floating welcome card */
.welcome-card { position: fixed; right: 24px; bottom: 96px; z-index: 60; width: 320px; max-width: calc(100vw - 48px); padding: 20px 22px; border-radius: 16px; background: rgba(10,14,22,.92); backdrop-filter: blur(12px); border: 1px solid var(--line2); box-shadow: 0 24px 60px rgba(0,0,0,.55); }
.welcome-card h3 { font-size: 17px; margin-bottom: 6px; }
.welcome-card p { font-size: 13px; color: var(--muted); margin-bottom: 14px; }
.welcome-actions { display: flex; gap: 10px; }
.welcome-actions .btn { flex: 1; padding: 11px 14px; font-size: 12px; }
.welcome-stay { background: rgba(255,255,255,.06); color: var(--text); border: 1px solid var(--line2); }
.welcome-stay:hover { background: rgba(255,255,255,.1); }

/* Sign-in modal */
.modal-ov { position: fixed; inset: 0; z-index: 80; display: flex; align-items: center; justify-content: center; padding: 20px; background: rgba(0,0,0,.62); backdrop-filter: blur(4px); }
.modal-ov[hidden] { display: none; }
.modal-card { width: 100%; max-width: 420px; background: #0d1713; border: 1px solid var(--line2); border-radius: 18px; padding: 28px; box-shadow: 0 30px 72px rgba(0,0,0,.6); }
.modal-card h2 { font-size: 22px; margin-bottom: 6px; }
.modal-card .sub { font-size: 13px; color: var(--muted); margin-bottom: 20px; }
.fld { display: flex; flex-direction: column; gap: 6px; margin-bottom: 14px; }
.fld label { font-size: 11px; color: var(--muted); text-transform: uppercase; letter-spacing: .06em; }
.fld input { background: rgba(255,255,255,.04); border: 1px solid var(--line2); border-radius: 8px; padding: 11px 13px; color: var(--text); font: inherit; font-size: 14px; }
.fld input:focus { outline: none; border-color: rgba(111,206,53,.5); background: rgba(111,206,53,.03); }
.remember { display: flex; align-items: center; gap: 10px; font-size: 13px; color: var(--text); margin: 8px 0 20px; cursor: pointer; }
.remember input { width: 18px; height: 18px; accent-color: var(--cta); flex-shrink: 0; }
.modal-actions { display: flex; gap: 10px; }
.modal-actions .btn { flex: 1; padding: 13px; }

/* Sticky "schedule a call" */
.call-md { position: fixed; right: 24px; bottom: 24px; z-index: 55; padding: 15px 26px; border-radius: 12px; background: var(--cta); color: #04120a; font-size: 13px; font-weight: 800; letter-spacing: .06em; text-transform: uppercase; box-shadow: 0 14px 36px -10px rgba(111,206,53,.6); transition: transform .15s, background .15s; }
.call-md:hover { background: var(--cta-hi); transform: translateY(-2px); }

/* ── IM First Framework ── */
.imfirst { padding: 96px 0; border-bottom: 1px solid var(--line); }
.imfirst-grid { display: grid; grid-template-columns: 1.05fr .95fr; gap: 56px; align-items: center; }
.imfirst h2 { font-size: clamp(34px, 5vw, 56px); font-weight: 600; color: #fff; margin: 18px 0 26px; letter-spacing: -.02em; }
.imfirst p { font-size: 15.5px; color: var(--muted); margin-bottom: 18px; max-width: 620px; }
.imfirst-rule { border: none; border-top: 1px solid var(--line2); margin: 30px 0 22px; max-width: 620px; }
.imfirst-stats { display: flex; gap: 64px; }
.imstat-v { font-size: 26px; font-weight: 700; color: var(--brand); letter-spacing: -.01em; }
.imstat-l { font-size: 11px; font-weight: 700; letter-spacing: .12em; text-transform: uppercase; color: var(--dim); margin-top: 4px; }

/* Glowing orb */
.orb-wrap { position: relative; display: grid; place-items: center; min-height: 440px; }
.orb { position: relative; width: 260px; height: 260px; border-radius: 50%;
    background: radial-gradient(circle at 42% 38%, #b2e57e 0%, #6fce35 26%, #4a8f2e 52%, #2a5a1c 74%, #163a10 100%);
    box-shadow: 0 0 90px 20px rgba(111,206,53,.35), inset -30px -30px 70px rgba(0,0,0,.55); }
.orb-ring { position: absolute; top: 50%; left: 50%; transform: translate(-50%,-50%); border-radius: 50%; border: 1px solid rgba(111,206,53,.18); }
.orb-ring.r1 { width: 360px; height: 360px; }
.orb-ring.r2 { width: 470px; height: 470px; border-color: rgba(79,179,165,.12); }
.orb-ring.r3 { width: 580px; height: 580px; border-color: rgba(111,206,53,.08); }

/* ── What we offer ── */
.offer-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px; }
.offer-card { position: relative; padding: 30px; border-radius: 18px; border: 1px solid var(--line2); background: var(--panel); transition: transform .2s, border-color .2s; }
.offer-card:hover { transform: translateY(-3px); border-color: rgba(255,255,255,.2); }
.offer-card.feature { grid-column: 1 / -1; border-color: rgba(111,206,53,.32); background: linear-gradient(150deg, rgba(111,206,53,.07), var(--panel) 60%); }
.offer-card.feature .offer-body { max-width: 640px; }
.offer-ic { width: 48px; height: 48px; border-radius: 13px; display: grid; place-items: center; margin-bottom: 16px; background: rgba(125,211,64,.1); color: var(--brand); }
.offer-ic svg { width: 24px; height: 24px; }
.offer-ic.c { background: rgba(79,179,165,.1); color: var(--brand2); }
.offer-ic.p { background: rgba(212,175,55,.12); color: var(--accent); }
.offer-card h3 { font-size: 18px; margin-bottom: 10px; letter-spacing: -.01em; }
.offer-card p { font-size: 14px; color: var(--muted); margin-bottom: 0; }
.offer-card.feature p { margin-bottom: 20px; }
.offer-tag { position: absolute; top: 22px; right: 22px; font-size: 10px; font-weight: 800; letter-spacing: .1em; text-transform: uppercase; color: var(--brand); background: rgba(125,211,64,.1); border: 1px solid rgba(125,211,64,.2); padding: 4px 11px; border-radius: 999px; }
@media (max-width: 760px) { .offer-grid { grid-template-columns: 1fr; } .offer-tag { position: static; display: inline-block; margin-bottom: 12px; } }

/* ── Reused lower sections ── */
.section { padding: 88px 0; }
.section.alt { background: linear-gradient(180deg, rgba(255,255,255,.016), transparent); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.section-head { max-width: 640px; margin-bottom: 44px; }
.section-head.center { margin-left: auto; margin-right: auto; text-align: center; }
.section-head h2 { font-size: clamp(26px, 4vw, 40px); font-weight: 800; margin: 14px 0; }
.section-head p { font-size: 15.5px; color: var(--muted); }

.lines { display: grid; grid-template-columns: repeat(auto-fit, minmax(230px, 1fr)); gap: 16px; }
.line { position: relative; padding: 28px 26px; border-radius: 18px; border: 1px solid var(--line2); background: var(--panel); overflow: hidden; }
.line::before { content: ''; position: absolute; left: 0; top: 0; bottom: 0; width: 4px; }
.line.msc::before { background: var(--brand); } .line.exo::before { background: var(--brand2); } .line.lyo::before { background: var(--accent); }
.line-tag { font-size: 10px; font-weight: 800; letter-spacing: .12em; text-transform: uppercase; }
.line.msc .line-tag { color: var(--brand); } .line.exo .line-tag { color: var(--brand2); } .line.lyo .line-tag { color: var(--accent); }
.line h3 { font-size: 19px; margin: 10px 0 8px; } .line p { font-size: 13.5px; color: var(--muted); margin-bottom: 14px; }
.line ul { margin: 0; padding: 0; list-style: none; } .line li { font-size: 13px; color: var(--dim); padding: 5px 0 5px 20px; position: relative; }
.line li::before { content: '›'; position: absolute; left: 4px; color: var(--muted); }

.steps { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.step { padding: 26px; border-radius: 18px; border: 1px solid var(--line2); background: var(--panel); }
.step-n { width: 36px; height: 36px; border-radius: 999px; display: grid; place-items: center; font-weight: 800; color: #04120a; background: var(--cta); margin-bottom: 14px; }
.step h3 { font-size: 16px; margin-bottom: 7px; } .step p { font-size: 13.5px; color: var(--muted); }

.cta-band { position: relative; overflow: hidden; border-radius: 24px; border: 1px solid rgba(111,206,53,.22); background: linear-gradient(135deg, rgba(111,206,53,.08), rgba(79,179,165,.04)); padding: 60px 32px; text-align: center; }
.cta-band h2 { font-size: clamp(28px, 4vw, 42px); font-weight: 800; margin-bottom: 14px; }
.cta-band p { font-size: 15.5px; color: var(--muted); max-width: 540px; margin: 0 auto 26px; }
.cta-row { display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; }

.footer { border-top: 1px solid var(--line); padding: 44px 0 32px; }
.footer-top { display: flex; justify-content: space-between; gap: 24px; flex-wrap: wrap; margin-bottom: 24px; }
.footer-brand { max-width: 300px; } .footer-brand .logo { margin-bottom: 12px; } .footer-brand p { font-size: 13px; color: var(--dim); }
.footer-cols { display: flex; gap: 56px; flex-wrap: wrap; }
.footer-col h4 { font-size: 11px; text-transform: uppercase; letter-spacing: .1em; color: var(--muted); margin: 0 0 12px; }
.footer-col a { display: block; font-size: 13.5px; color: var(--dim); padding: 4px 0; } .footer-col a:hover { color: var(--brand); }
.footer-legal { border-top: 1px solid var(--line); padding-top: 20px; display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap; font-size: 12px; color: var(--dim); }

/* ── Responsive ── */
@media (max-width: 940px) {
    .nav-menu, .nav-actions { display: none; }
    .nav-burger { display: inline-flex; }
    body.nav-open .nav-menu { display: flex; position: absolute; top: 76px; left: 0; right: 0; flex-direction: column; gap: 0; background: #000; border-bottom: 1px solid var(--line2); padding: 8px 0; margin: 0; }
    body.nav-open .nav-menu a { padding: 14px 34px; }
    .imfirst-grid { grid-template-columns: 1fr; gap: 36px; } .orb-wrap { min-height: 340px; order: -1; }
    .lines, .steps { grid-template-columns: 1fr; }
    .orb-ring.r3 { display: none; }
}
@media (max-width: 520px) {
    .wrap { padding: 0 20px; }
    .hero { min-height: 70vh; } .hero-rot { min-height: 2.4em; }
    .imfirst-stats { gap: 36px; }
    .welcome-card { display: none; }
    .orb-ring.r2 { display: none; }
}
@media (prefers-reduced-motion: reduce) { * { transition: none !important; } }