/* Shared structure: nav, buttons, hero, chart, strips, footer.
   Colours/fonts come from tokens.css — avoid hardcoding hex here. */
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}}
body{background:var(--bg);color:var(--text);font-family:var(--font-body);line-height:1.6;-webkit-font-smoothing:antialiased;overflow-x:hidden}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 32px}
h1,h2{font-family:var(--font-display);font-weight:600;letter-spacing:-.025em;line-height:1.04}
a{color:inherit;text-decoration:none}
.kicker{font-family:var(--font-mono);font-size:12px;letter-spacing:.18em;text-transform:uppercase;color:var(--text-dim)}
.kicker .d{color:var(--signal)}

/* NAV */
nav{position:fixed;top:0;left:0;right:0;z-index:60;backdrop-filter:saturate(140%) blur(14px);background:rgba(246,248,248,.72);border-bottom:1px solid transparent;transition:.3s}
nav.scrolled{border-bottom-color:var(--line);background:rgba(246,248,248,.88)}
.nav-inner{max-width:var(--maxw);margin:0 auto;padding:16px 32px;display:flex;align-items:center;gap:32px}
.brand{display:flex;align-items:center;gap:10px;font-family:var(--font-mono);font-weight:500;font-size:17px}
.nav-links{display:flex;gap:30px;margin-left:auto;align-items:center}
.nav-links a{font-size:14px;color:var(--text-mid);transition:color .2s}
.nav-links a:hover{color:var(--text)}
.nav-links a.btn-primary{color:#fff}
.btn{font-size:14px;font-weight:500;padding:11px 20px;border-radius:9px;cursor:pointer;border:1px solid transparent;transition:transform .15s,background .2s,border-color .2s;display:inline-block}
.btn-primary{background:var(--signal);color:#fff;font-weight:600}
.btn-primary:hover{transform:translateY(-1px);filter:brightness(1.08)}
.btn-ghost{border-color:var(--line);color:var(--text)}
.btn-ghost:hover{border-color:var(--text-dim);background:var(--bg-elev)}
.nav-toggle{display:none;margin-left:auto;background:none;border:1px solid var(--line);border-radius:8px;padding:7px 10px;cursor:pointer}
.nav-toggle span{display:block;width:18px;height:2px;background:var(--text);margin:3px 0;border-radius:2px}

/* HERO */
header{padding:136px 0 84px;text-align:center}
.hero h1{font-size:clamp(38px,5.4vw,62px);max-width:15ch;margin:0 auto}
.hero .lead{font-size:18px;color:var(--text-mid);max-width:54ch;margin:22px auto 0}
.hero .lead strong{color:var(--text);font-weight:600}

/* INTERACTIVE TRAJECTORY */
.viz{margin:48px auto 0;max-width:1040px;background:linear-gradient(180deg,var(--bg-elev),#F1F5F5);border:1px solid var(--line);border-radius:var(--radius-lg);padding:30px 30px 26px;position:relative;overflow:hidden;text-align:left;box-shadow:0 1px 2px rgba(24,34,42,.04),0 12px 32px rgba(24,34,42,.06)}
.viz::before{content:"";position:absolute;inset:0;background:radial-gradient(520px 260px at 80% 8%,var(--signal-glow),transparent 70%);pointer-events:none}
.viz-head{display:flex;justify-content:space-between;align-items:baseline;flex-wrap:wrap;gap:10px;position:relative}
.viz-head .t{font-family:var(--font-mono);font-size:13px;color:var(--text-mid)}
.readout{font-family:var(--font-mono);font-size:13px;color:var(--text-dim)}
.readout b{color:var(--signal);font-weight:500}
svg.chart{display:block;width:100%;height:auto;margin-top:6px}
.control{display:flex;align-items:center;gap:16px;margin-top:14px;position:relative}
.control label{font-family:var(--font-mono);font-size:12px;color:var(--text-mid);white-space:nowrap}
.control input[type=range]{-webkit-appearance:none;appearance:none;height:3px;background:var(--line);border-radius:3px;flex:1;outline:none}
.control input[type=range]::-webkit-slider-thumb{-webkit-appearance:none;width:18px;height:18px;border-radius:50%;background:var(--signal);cursor:pointer;box-shadow:0 0 0 5px var(--signal-glow);transition:transform .15s}
.control input[type=range]::-webkit-slider-thumb:hover{transform:scale(1.12)}
.control input[type=range]::-moz-range-thumb{width:18px;height:18px;border:none;border-radius:50%;background:var(--signal);cursor:pointer;box-shadow:0 0 0 5px var(--signal-glow)}
.control .age{font-family:var(--font-mono);font-size:13px;color:var(--text);min-width:62px;text-align:right}
.legend{display:flex;gap:20px;margin-top:16px;font-family:var(--font-mono);font-size:11.5px;position:relative}
.legend span{display:inline-flex;align-items:center;gap:7px;color:var(--text-mid)}
.legend i{width:14px;height:2px;border-radius:2px}
.sw-hold{background:var(--signal)} .sw-fall{background:var(--fall)}
.illus{margin-top:12px;font-family:var(--font-mono);font-size:10.5px;color:var(--text-dim);position:relative}
.hero-cta{display:flex;gap:13px;margin-top:36px;justify-content:center;flex-wrap:wrap}

/* METHOD STRIP */
.strip{border-top:1px solid var(--line-soft);padding:66px 0}
/* Pricing centred to match .final, .trust and header, which all pair text-align:center
   with auto margins on width-constrained children. The card row carried
   max-width:1040px and no auto margin, so it sat left inside the 1280px wrap and left
   a gap down the right-hand side. Card interiors are pushed back to left: centred
   feature lists are noticeably harder to scan. */
#pricing > .wrap{text-align:center}
#pricing > .wrap > p{margin-left:auto;margin-right:auto}
#pricing > .wrap > div{margin-left:auto;margin-right:auto}
#pricing > .wrap > div > div{text-align:left}
/* Grid, not wrapping flex: with flex-wrap the first item of a wrapped row kept its left divider,
   leaving a stray vertical line (visible at narrow widths even with the old three items). A fixed
   column count guarantees a single row, so only :first-child needs its divider removed. */
.method{display:grid;grid-template-columns:repeat(5,1fr);align-items:start}
.method .it{padding:4px 20px;border-left:1px solid var(--line-soft)}
.method .it:first-child{border-left:0}
/* Stack before the columns get too narrow to read. */
@media (max-width:980px){
  .method{grid-template-columns:1fr}
  .method .it{border-left:0;border-top:1px solid var(--line-soft);padding:18px 0;text-align:center}
  .method .it:first-child{border-top:0}
}
.method .it b{font-family:var(--font-display);font-weight:600;font-size:18px;display:block;margin-bottom:4px}
.method .it span{font-size:14px;color:var(--text-mid)}

/* TRUST */
.trust{border-top:1px solid var(--line-soft);padding:66px 0;text-align:center}
.trust p{max-width:64ch;margin:0 auto;color:var(--text-mid);font-size:16px}
.trust p strong{color:var(--text);font-weight:600}
.trust .pledge{margin-top:14px;font-family:var(--font-mono);font-size:12px;color:var(--text-dim)}
.trust .pledge b{color:var(--signal);font-weight:500}

/* FINAL CTA */
.final{border-top:1px solid var(--line-soft);text-align:center;padding:96px 0 104px;background:radial-gradient(620px 300px at 50% 130%,var(--signal-glow),transparent 70%)}
.final h2{font-size:clamp(28px,4.2vw,46px);max-width:20ch;margin:14px auto 0}
.final p{color:var(--text-mid);font-size:17px;margin:18px auto 0;max-width:44ch}

/* FOOTER */
footer{border-top:1px solid var(--line-soft);padding:64px 0 40px;color:var(--text-dim)}
.foot-top{display:grid;grid-template-columns:minmax(200px,1fr) minmax(0,2.4fr);gap:44px 72px;align-items:start}
.foot-links{display:grid;grid-template-columns:repeat(auto-fit,minmax(120px,1fr));gap:28px 40px}
.foot-col h4{font-family:var(--font-mono);font-size:11px;letter-spacing:.1em;text-transform:uppercase;color:var(--text-mid);margin-bottom:13px;font-weight:500}
.foot-col a{display:block;font-size:14px;color:var(--text-dim);padding:5px 0;transition:color .2s}
.foot-col a:hover{color:var(--text)}
/* Runs full width by design. A measure cap was tried and reverted — at this size it left the right
   half of the footer visibly empty, which read worse than the long lines it fixed. */
.disclaimer{margin-top:52px;padding-top:24px;border-top:1px solid var(--line-soft);font-size:12.5px;color:var(--text-dim);line-height:1.7}

/* Footer bottom, centred — the same treatment the blog index footer already uses. Centring needs a
   measure: left-aligned text can run full width, but centred text cannot, or the lines are still
   ~180 characters and merely centred. Capping it and auto-margining puts the leftover space evenly
   on both sides, which reads as deliberate rather than as the lopsided gap an earlier left-aligned
   cap produced. */
.foot-bottom{margin-top:52px;padding-top:24px;border-top:1px solid var(--line-soft);text-align:center}
.foot-bottom .disclaimer{margin:0 auto;padding:0;border-top:0;max-width:118ch}
.foot-bottom .solvion-family{margin:18px auto 0;text-align:center;max-width:118ch}

/* Sibling-site line. Sits apart from the legal block so it reads as a signature, not fine print. */
footer .solvion-family{margin:26px 0 0;font-size:12.5px;line-height:1.6;color:var(--text-dim)}
/* Selector is footer-scoped so it outranks the global `a{color:inherit}` without !important —
   otherwise these read as plain grey text and nobody can tell they are links. */
footer .solvion-family a{color:var(--text-mid);border-bottom:1px solid var(--line)}
footer .solvion-family a:hover{color:var(--text);border-bottom-color:var(--text-dim)}

/* tablet: hand the nav to the hamburger before the links crowd the CTA */
@media (max-width:860px){
  .nav-links{gap:22px}
}
@media (max-width:680px){
  .wrap{padding:0 20px}
  .nav-inner{padding:14px 20px;gap:16px}
  .nav-links{display:none}
  .nav-links.open{display:flex;position:absolute;top:58px;left:0;right:0;flex-direction:column;background:var(--bg-elev);border-bottom:1px solid var(--line);padding:16px 20px;gap:6px}
  .nav-links.open a{padding:11px 0}
  .nav-links.open a.btn-primary{padding:13px 20px;text-align:center;margin-top:6px}
  .nav-toggle{display:block;padding:9px 11px}
  .btn{padding:13px 20px}
  header{padding:104px 0 44px}
  .hero .lead{font-size:16.5px;margin-top:18px}
  .hero-cta{gap:10px;margin-top:28px}
  .hero-cta .btn{width:100%;text-align:center}
  .viz{padding:20px 15px 18px}
  .control{flex-wrap:wrap;gap:8px 14px}
  .control label{width:100%}
  .legend{gap:14px}
  .strip,.trust{padding:48px 0}
  .final{padding:64px 0 72px}
  .method .it{border-left:0;border-top:1px solid var(--line-soft);padding:18px 0;max-width:none;width:100%;text-align:center}
  .method .it:first-child{border-top:0}
  .foot-top{grid-template-columns:1fr;gap:32px}
  .foot-links{grid-template-columns:repeat(2,1fr);gap:22px 28px}
}
:focus-visible{outline:2px solid var(--signal);outline-offset:3px;border-radius:4px}

/* about / science page */
.ev{display:grid;grid-template-columns:repeat(2,1fr);gap:18px}
.ev-item{background:var(--bg-elev);border:1px solid var(--line);border-radius:var(--radius-lg);padding:24px 26px}
.ev-tag{font-family:var(--font-mono);font-size:11px;letter-spacing:.1em;text-transform:uppercase;color:var(--text-dim)}
.ev-item h3{font-family:var(--font-display);font-size:20px;font-weight:600;letter-spacing:-.02em;margin:8px 0 10px}
.ev-item p{font-size:15px;color:var(--text-mid);line-height:1.6;margin:0 0 12px}
.ev-item p em{color:var(--text);font-style:italic}
.ev-cite{font-family:var(--font-mono);font-size:11.5px;color:var(--text-dim)}
.board{display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:16px}
.advisor{background:var(--bg-elev);border:1px solid var(--line);border-radius:var(--radius-lg);padding:22px;text-align:center}
.advisor.placeholder{border-style:dashed;opacity:.7}
.advisor-photo{width:72px;height:72px;border-radius:50%;background:var(--line-soft);margin:0 auto 14px}
.advisor-name{font-family:var(--font-display);font-size:17px;font-weight:600;color:var(--text)}
.advisor-cred{font-size:13px;color:var(--text-mid);margin-top:4px;line-height:1.4}
@media (max-width:680px){.ev{grid-template-columns:1fr}}