:root {
    --paper:#F6F4EF; --paper-2:#EFEBE3; --bone:#FBFAF7;
    --ink:#1C2024; --ink-soft:#4A5057; --line:#D9D3C7;
    --steel:#3E5C5A; --steel-deep:#27403E; --clay:#A8623F; --clay-deep:#8E5031;
    --serif:'Newsreader', Georgia, 'Times New Roman', serif;
    --sans:'Spline Sans', system-ui, -apple-system, sans-serif;
    --maxw:1180px; --ease:cubic-bezier(.22,.61,.36,1);
    --line-strong:#A9A293;
    /* fluid spacing scale — one rhythm for the whole page */
    --space-3:clamp(12px,1.6vw,18px); --space-4:clamp(18px,2.4vw,28px);
    --space-5:clamp(28px,3.4vw,46px); --space-6:clamp(40px,5vw,64px);
    --space-7:clamp(56px,7vw,88px);   --space-8:clamp(72px,9vw,120px);
    /* elevation language — resting vs raised */
    --shadow-1:0 1px 2px rgba(28,32,36,.05);
    --shadow-2:0 4px 14px rgba(28,32,36,.06),0 1px 3px rgba(28,32,36,.05);
    --shadow-3:0 14px 36px rgba(28,32,36,.10),0 2px 8px rgba(28,32,36,.06);
    /* clay CTA shadows — intentional warm tint, not generic gray */
    --shadow-clay-1:0 1px 2px rgba(28,32,36,.12);
    --shadow-clay-2:0 6px 18px rgba(142,80,49,.22);
    /* radius language: sharp = clinical, pill = chips/tabs, soft = chat only */
    --r-sharp:2px; --r-pill:30px; --r-soft:12px;
  }
  ::selection{background:rgba(168,98,63,.22);color:var(--ink)}
  *{box-sizing:border-box;margin:0;padding:0}
  html{scroll-behavior:smooth;scroll-padding-top:90px}
  body{
    background:var(--paper); color:var(--ink); font-family:var(--sans);
    font-size:18px; line-height:1.6; -webkit-font-smoothing:antialiased;
    font-optical-sizing:auto; position:relative; overflow-x:hidden;
  }
  h1,h2,h3{font-family:var(--serif);font-weight:500;line-height:1.1;letter-spacing:-.01em;font-optical-sizing:auto}
  a{color:inherit;text-decoration:none}
  img{max-width:100%;display:block}

  .wrap{max-width:var(--maxw);margin:0 auto;padding:0 28px}
  .eyebrow{display:inline-flex;align-items:center;gap:12px;font:600 13px/1 var(--sans);letter-spacing:.14em;text-transform:uppercase;color:var(--steel)}
  .eyebrow::before{content:"";width:22px;height:1px;background:currentColor;opacity:.5}
  .skip{position:absolute;left:-9999px;top:0;background:var(--ink);color:var(--bone);padding:10px 16px;z-index:200}
  .skip:focus{left:8px;top:8px}
  .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}
  :focus-visible{outline:2px solid var(--steel-deep);outline-offset:2px;
    box-shadow:0 0 0 4px rgba(62,92,90,.18);border-radius:3px}
  .dark a:focus-visible,.dark button:focus-visible,.btn-primary:focus-visible,.btn-on-dark:focus-visible,
  .fd-launch:focus-visible,.fd-head button:focus-visible{outline-color:var(--bone)}

  /* ---------- ambient backgrounds ---------- */
  .bg-grain{position:fixed;inset:0;z-index:-3;pointer-events:none;opacity:.04;
    background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='160' height='160'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.85' numOctaves='2' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E")}
  .bg-contour{position:fixed;inset:0;z-index:-2;pointer-events:none;opacity:.5;will-change:transform}
  .bg-contour svg{position:absolute;width:120%;height:120%}

  /* ---------- buttons ---------- */
  .btn{display:inline-flex;align-items:center;gap:9px;font:600 15px/1 var(--sans);letter-spacing:.02em;
    padding:14px 22px;border-radius:2px;border:1px solid transparent;cursor:pointer;
    transition:background .2s var(--ease),color .2s var(--ease),border-color .2s var(--ease),transform .2s var(--ease),box-shadow .2s var(--ease)}
  .btn-primary{background:var(--clay-deep);color:#fff;box-shadow:var(--shadow-clay-1)}
  .btn-primary:hover{background:#7A4429;transform:translateY(-1px);box-shadow:var(--shadow-clay-2)}
  .btn-primary:active{transform:translateY(0);box-shadow:0 1px 2px rgba(28,32,36,.18)}
  .btn-ghost{background:transparent;color:var(--ink);border-color:var(--line-strong)}
  .btn-ghost:hover{border-color:var(--ink)}
  .btn-on-dark{background:var(--clay-deep);color:#fff}
  .btn-on-dark:hover{background:#fff;color:var(--steel-deep)}

  /* ---------- header ---------- */
  header.site{position:sticky;top:0;z-index:100;background:rgba(246,244,239,.86);backdrop-filter:blur(10px);border-bottom:1px solid transparent;transition:border-color .3s,box-shadow .3s}
  header.site.scrolled{border-bottom-color:var(--line);box-shadow:0 1px 0 rgba(28,32,36,.03)}
  .nav{display:flex;align-items:center;justify-content:space-between;gap:24px;height:74px}
  .brand{display:flex;align-items:center;gap:11px;font-family:var(--serif);font-size:22px;font-weight:600;letter-spacing:-.01em;white-space:nowrap}
  .brand svg{flex:0 0 auto}
  .brand b{font-weight:600}
  .navlinks{display:flex;gap:26px;align-items:center}
  .navlinks a{font:500 15px/1 var(--sans);color:var(--ink-soft);transition:color .25s var(--ease);position:relative}
  .navlinks a::after{content:"";position:absolute;left:0;right:100%;bottom:-5px;height:1.5px;background:var(--steel);transition:right .25s var(--ease)}
  .navlinks a:hover{color:var(--ink)} .navlinks a:hover::after{right:0}
  .navlinks a[aria-current="page"]{color:var(--ink)} .navlinks a[aria-current="page"]::after{right:0}
  .nav-cta{display:flex;align-items:center;gap:16px}
  .nav-phone{font:600 15px/1 var(--sans);color:var(--steel);white-space:nowrap;padding:8px 4px;display:inline-block}
  .nav-phone:hover{text-decoration:underline}
  .menu-toggle{display:none;background:none;border:1px solid var(--line);border-radius:2px;padding:9px 11px;cursor:pointer}
  .menu-toggle span{display:block;width:20px;height:2px;background:var(--ink);margin:4px 0}

  /* ---------- background flow-spine (large, translucent, interactive) ---------- */
  .spine-bg{position:fixed;top:0;left:0;height:100vh;width:300px;z-index:-1;pointer-events:none;color:var(--steel);
    -webkit-mask-image:linear-gradient(90deg,#000 0%,#000 55%,transparent 100%);mask-image:linear-gradient(90deg,#000 0%,#000 55%,transparent 100%)}
  .spine-bg svg{position:absolute;top:50%;left:-30px;height:122vh;width:auto;transform:translateY(-50%);will-change:transform}
  .spine-bg .fseg{will-change:transform}
  .spine-bg .fv{opacity:.18;transition:opacity .6s var(--ease)}
  .spine-bg .fv.lit{opacity:.40}
  .spine-bg .fvdisc{fill:var(--clay);stroke:none}   /* intervertebral discs */
  .spine-bg .fvnuc{fill:var(--paper);stroke:none;opacity:.55}   /* nucleus pulposus — lighter disc center */
  .spine-bg .fvmark{fill:currentColor;stroke:none}   /* facet joint + costal (rib) facets */
  .spine-bg .fvunc{fill:none;stroke:currentColor;stroke-width:1}   /* cervical uncinate process */
  .spine-bg .fvbody{fill:none;stroke:currentColor}                 /* vertebral body / sacrum outline — bone */
  .spine-bg .fvsp{fill:none;stroke:currentColor;stroke-linejoin:round}   /* spinous process blade — bone */
  .spine-bg .fvsh{fill:currentColor;stroke:none;opacity:.22}        /* underside shade — subtle volume */
  .spine-bg .fvped{fill:none;stroke:currentColor;stroke-width:1;opacity:.7}   /* pedicle / lamina bridge */
  .spine-bg .fvcoccyx{fill:none;stroke:currentColor;stroke-width:1.1}         /* coccyx tail */
  .vertebra{color:var(--line);transition:color .5s var(--ease)}
  .vertebra.is-active{color:var(--steel)}

  /* ---------- hero CNS: clickable brain + spine section-nav ---------- */
  .cns{display:flex;flex-direction:column;align-items:flex-start;gap:0;user-select:none}
  .cns-spine{display:flex;flex-direction:column;align-items:flex-start;gap:2px;margin-top:-2px}
  /* whole row (glyph + label + padding) is ONE clickable button */
  .vnav{display:flex;align-items:center;gap:12px;background:none;border:none;cursor:pointer;padding:4px 8px 4px 2px;border-radius:3px;color:var(--line);line-height:0;transition:color .3s var(--ease),transform .25s var(--ease),background .2s var(--ease)}
  .vnav:hover{color:var(--steel);transform:translateX(3px)}
  .vnav:hover,.vnav:focus-visible{background:rgba(62,92,90,.07)}
  .vnav.active{color:var(--clay-deep)}
  .vnav .lbl{white-space:nowrap;font:600 10.5px/1 var(--sans);letter-spacing:.13em;text-transform:uppercase;color:var(--ink-soft);transition:color .2s var(--ease)}
  .vnav:hover .lbl,.vnav.active .lbl,.vnav:focus-visible .lbl{color:var(--ink)}

  /* ---------- persistent vertebra rail: the spine, continuing past the hero ---------- */
  .spine-rail{position:fixed;left:18px;top:50%;transform:translateY(-50%);z-index:90;
    display:flex;flex-direction:column;gap:5px;padding:14px 0;opacity:0;pointer-events:none;
    transition:opacity .45s var(--ease)}
  /* cord track (unread) — aligned to vertebral body centers (~11px from rail left edge) */
  .spine-rail::before{content:"";position:absolute;left:11px;top:0;bottom:0;width:2px;
    background:var(--line);border-radius:2px}
  /* cord fill (read progress) — grows top-down via CSS custom property */
  .spine-rail::after{content:"";position:absolute;left:11px;top:0;width:2px;
    height:var(--rail-progress,0%);background:linear-gradient(var(--clay-deep),var(--steel));
    border-radius:2px;transition:height .25s var(--ease)}
  .rail-on .spine-rail{opacity:1;pointer-events:auto}
  @media (max-width:1080px){.spine-rail{display:none}}
  .spine-rail button{position:relative;z-index:1;display:block;border:none;background:none;cursor:pointer;
    color:var(--line);line-height:0;padding:2px;transition:color .35s var(--ease),transform .25s var(--ease)}
  .spine-rail button:hover{transform:translateX(2px)}
  .spine-rail button.lit{color:var(--steel)}        /* secondary; cord carries progress */
  .spine-rail button.active{color:var(--clay-deep)} /* current section */
  .spine-rail button.active .vertebra{transform:scale(1.08)}
  .spine-rail .vertebra{width:26px;height:22px}
  .spine-rail .lbl{position:absolute;left:100%;top:50%;transform:translateY(-50%) translateX(-4px);
    margin-left:10px;white-space:nowrap;font:600 10px/1 var(--sans);letter-spacing:.13em;
    text-transform:uppercase;color:var(--ink-soft);opacity:0;transition:opacity .2s var(--ease),transform .2s var(--ease)}
  .spine-rail button:hover .lbl,.spine-rail button:focus-visible .lbl{opacity:1;transform:translateY(-50%) translateX(0)}

  section{padding:var(--space-8) 0;position:relative}
  section[id],#top,:target{scroll-margin-top:90px}
  section.tight{padding:var(--space-6) 0}
  .band-2{background:var(--paper-2)}
  .lede{max-width:62ch;color:var(--ink-soft);font-size:19px}

  /* ---------- reveal on scroll (progressive: only hides when JS is active) ---------- */
  html.js .reveal{opacity:0;transform:translateY(14px);transition:opacity .55s var(--ease),transform .55s var(--ease)}
  html.js .reveal.in{opacity:1;transform:none}

  /* ---------- hero ---------- */
  .hero{padding:calc(var(--space-8) - 8px) 0 var(--space-8);position:relative;overflow:hidden}
  .hero > .wrap{position:relative;z-index:1}
  /* hero ambient motion (scoped to hero) */
  .hero-bg{position:absolute;inset:0;z-index:0;pointer-events:none;overflow:hidden}
  .hero-scan{position:absolute;left:0;right:46%;top:-2%;height:1px;
    background:linear-gradient(90deg,transparent,var(--steel) 45%,transparent);opacity:.22;
    animation:heroScan 8.5s linear 3 forwards}
  @keyframes heroScan{0%{top:-2%}100%{top:102%}}
  .hero-particles{position:absolute;inset:0}
  .hero-particles .vp{position:absolute;line-height:0;color:var(--steel);opacity:0;
    transform:scale(var(--sc,1)) rotate(var(--r,0deg));
    animation-name:vpDrift;animation-timing-function:linear;animation-iteration-count:infinite;will-change:transform,opacity}
  .hero-particles .vp .vertebra{width:40px;height:34px}
  @keyframes vpDrift{
    0%{opacity:0;transform:translateY(28px) scale(var(--sc,1)) rotate(var(--r,0deg))}
    14%{opacity:.10}
    86%{opacity:.10}
    100%{opacity:0;transform:translateY(-48px) scale(var(--sc,1)) rotate(var(--r,0deg))}}
  /* hero widget panel */
  .hero-panel{width:100%;max-width:308px;background:var(--bone);border:1px solid var(--line);border-radius:var(--r-sharp);box-shadow:var(--shadow-2);
    padding:20px 20px 16px}
  .hp-status{display:inline-flex;align-items:center;gap:9px;font:600 11px/1.3 var(--sans);letter-spacing:.1em;
    text-transform:uppercase;color:var(--steel-deep)}
  .hp-status .dot{position:relative;flex:0 0 auto;width:8px;height:8px;border-radius:50%;background:var(--steel)}
  .hp-status .dot::after{content:"";position:absolute;inset:0;border-radius:50%;background:var(--steel);animation:hpPing 2.6s var(--ease) infinite}
  @keyframes hpPing{0%{transform:scale(1);opacity:.55}80%,100%{transform:scale(3.2);opacity:0}}
  .hp-pulse{margin-top:16px}
  .hp-pulse svg{width:100%;height:30px;display:block}
  .hp-pulse .ecg{fill:none;stroke-linecap:round;stroke-linejoin:round}
  .hp-pulse .ecg.base{stroke:var(--line-strong);stroke-width:1.2;opacity:.5}
  .hp-pulse .ecg.run{stroke:var(--clay-deep);stroke-width:1.8;stroke-dasharray:26 460;animation:ecgRun 3.4s linear infinite}
  @keyframes ecgRun{from{stroke-dashoffset:486}to{stroke-dashoffset:0}}
  .hp-pulse-lab{display:block;margin-top:6px;font:600 10px/1 var(--sans);letter-spacing:.1em;text-transform:uppercase;color:var(--ink-soft);opacity:.7}
  .hp-stats{display:grid;grid-template-columns:repeat(3,1fr);gap:8px;margin:16px 0 4px;padding:16px 0;
    border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
  .hp-stat{text-align:center}
  .hp-stat .v{display:block;font-family:var(--serif);font-weight:500;font-size:23px;line-height:1;color:var(--steel-deep);font-variant-numeric:tabular-nums;font-feature-settings:"tnum" 1}
  .hp-stat .k{display:block;margin-top:6px;font:600 10px/1.1 var(--sans);letter-spacing:.06em;text-transform:uppercase;color:var(--ink-soft)}
  a.hp-stat{text-decoration:none;color:inherit;transition:opacity .2s var(--ease)}
  a.hp-stat:hover,a.hp-stat:focus-visible{opacity:.7}
  .hp-nav{margin-top:14px}
  .hp-nav .hero-art-label{display:block;margin-bottom:8px}
  .hero-grid{display:grid;grid-template-columns:1.32fr .68fr;gap:40px;align-items:center}
  .hero h1{font-size:clamp(40px,5.4vw,62px);line-height:1.06;letter-spacing:-.02em;margin:18px 0 0;text-wrap:balance;max-width:16ch}
  .hero .sub{margin-top:var(--space-4);max-width:46ch;font-size:20px;line-height:1.5;color:var(--ink-soft);text-wrap:pretty}
  .hero .who{margin-top:14px;font:500 16px/1.5 var(--sans);color:var(--ink)}
  .hero .who.who-sub{margin-top:var(--space-3);font:500 12px/1.7 var(--sans);letter-spacing:.07em;text-transform:uppercase;color:var(--ink-soft)}
  .hero .who b{font-weight:600}
  .hero-cta{display:flex;flex-wrap:wrap;gap:14px;margin-top:32px}
  .hero-art{display:flex;flex-direction:column;justify-content:center;align-items:flex-start;gap:14px;position:relative;will-change:transform;padding-left:8px}
  .hero-art-label{font:600 11px/1 var(--sans);letter-spacing:.16em;text-transform:uppercase;color:var(--ink-soft);opacity:.7}

  /* ---------- credential strip ---------- */
  .creds{border-top:2px solid var(--clay-deep);border-bottom:1px solid var(--line);background:var(--bone)}
  .creds .chip{position:relative;padding:18px 26px;font:500 15px/1.3 var(--sans);color:var(--ink);border-right:1px solid var(--line);flex:1 1 0;text-align:center;cursor:pointer;transition:background .2s var(--ease),color .2s var(--ease)}
  .creds .chip:last-child{border-right:none}
  .creds a.chip:hover,.creds a.chip:focus-visible{background:var(--paper-2)}
  .creds a.chip:hover b,.creds a.chip:focus-visible b{color:var(--steel-deep)}
  .creds .chip b{display:block;font:600 12px/1 var(--sans);letter-spacing:.12em;text-transform:uppercase;color:var(--steel);margin-bottom:7px}
  .creds .chip .vfy{position:absolute;top:11px;right:12px;font-size:12px;color:var(--clay-deep);opacity:.35;transition:opacity .2s var(--ease)}
  .creds a.chip:hover .vfy,.creds a.chip:focus-visible .vfy{opacity:1}
  .creds .chip:last-child{box-shadow:inset 0 -3px 0 var(--clay-deep)}

  /* ---------- section heading ---------- */
  .head{max-width:64ch}
  .head h2{font-size:clamp(28px,3.6vw,38px);margin:14px 0 0}
  .head p{margin-top:16px;color:var(--ink-soft)}

  /* ---------- conditions grid ---------- */
  .cond-grid{display:grid;grid-template-columns:repeat(2,1fr);margin-top:var(--space-5);border-top:1px solid var(--line)}
  .cond{display:flex;gap:16px;padding:26px 28px 26px 4px;border-bottom:1px solid var(--line);transition:background .25s var(--ease)}
  .cond:nth-child(odd){border-right:1px solid var(--line);padding-right:34px}
  .cond:nth-child(even){padding-left:28px}
  .cond:hover{background:var(--bone)}
  .cond:last-child:nth-child(odd){grid-column:1 / -1;border-right:none;padding-right:28px}
  .cond .tick{flex:0 0 auto;width:7px;height:7px;margin-top:9px;border-radius:1px;background:var(--steel);transform:rotate(45deg);font-size:0}
  .cond{cursor:pointer}
  .cond h3{font-size:21px;font-weight:500;transition:color .2s var(--ease)}
  .cond:hover h3,.cond:focus-visible h3{color:var(--steel-deep)}
  .cond p{margin-top:7px;font-size:15.5px;color:var(--ink-soft);line-height:1.55}
  .cond .cond-more{display:inline-flex;align-items:center;gap:6px;margin-top:13px;font:600 13px/1 var(--sans);letter-spacing:.03em;color:var(--clay-deep)}
  .cond .cond-more span{transition:transform .25s var(--ease)}
  .cond:hover .cond-more span,.cond:focus-visible .cond-more span{transform:translateX(4px)}

  /* ---------- INTERACTIVE SPINE EXPLORER ---------- */
  .explore-grid{display:grid;grid-template-columns:300px 1fr;gap:54px;margin-top:var(--space-5);align-items:start}
  .spine-stage{position:relative;display:flex;justify-content:center;padding:8px 0}
  .spine-stage svg{overflow:visible;max-height:440px;height:auto}
  .spine-stage #anatomySpine[data-spine3d]{width:100%;height:460px;position:relative}
  .spine-stage #anatomySpine[data-spine3d] canvas{width:100%!important;height:100%!important;display:block;touch-action:pan-y;cursor:grab}
  .spine-stage #anatomySpine[data-spine3d] canvas:active{cursor:grabbing}
  .s3d-hint{position:absolute;bottom:-4px;left:0;right:0;text-align:center;font-size:11px;letter-spacing:.03em;color:#9aa09c;pointer-events:none}
  /* homepage centerpiece: the interactive 3D spine leads the page */
  .centerpiece .head{text-align:center;max-width:720px;margin-inline:auto}
  .centerpiece .explore-grid{grid-template-columns:minmax(320px,440px) 1fr;gap:64px;align-items:center}
  .centerpiece .spine-stage #anatomySpine[data-spine3d]{height:560px}
  .centerpiece-more{margin-top:26px}
  @media (max-width:820px){.centerpiece .explore-grid{grid-template-columns:1fr}.centerpiece .spine-stage #anatomySpine[data-spine3d]{height:440px}}
  .s3d-dot{position:absolute;width:20px;height:20px;margin:-10px 0 0 -10px;border-radius:50%;border:1.5px solid var(--clay);background:rgba(168,98,63,.16);cursor:pointer;z-index:3;transition:transform .15s,background .15s}
  .s3d-dot::after{content:"";position:absolute;inset:5.5px;border-radius:50%;background:var(--clay)}
  .s3d-dot::before{content:"";position:absolute;inset:-5px;border-radius:50%;border:1px solid var(--clay);opacity:.5;animation:s3dpulse 2.6s ease-out infinite}
  .s3d-dot:hover,.s3d-dot.on{transform:scale(1.28);background:rgba(168,98,63,.3)}
  @keyframes s3dpulse{0%{transform:scale(.7);opacity:.5}70%{opacity:0}100%{transform:scale(1.5);opacity:0}}
  @media (prefers-reduced-motion:reduce){.s3d-dot::before{animation:none}}
  .seg{cursor:pointer;transition:opacity .3s var(--ease),transform .4s var(--ease)}
  .seg .vb,.seg .sacrum,.seg .coccyx{fill:var(--bone);stroke:var(--steel);stroke-width:1.5;stroke-linejoin:round;transition:fill .3s var(--ease),stroke .3s var(--ease)}
  .seg .sp{fill:var(--steel);opacity:.6;stroke:var(--steel);stroke-width:.4;stroke-linejoin:round;transition:opacity .3s var(--ease),fill .3s var(--ease)}
  .seg .disc{fill:url(#discGrad);opacity:.78;transition:opacity .3s var(--ease)}
  .seg .vhi{fill:#fff;opacity:.45;pointer-events:none}   /* top sheen — gives bodies a lit, rounded read */
  .seg .vsh{fill:#27403E;opacity:.13;pointer-events:none} /* underside shade -> rounded volume */
  .seg .facet{fill:var(--steel);opacity:.4}              /* pedicle / facet nub */
  .seg .nucleus{fill:#D98E63;opacity:.7;pointer-events:none}            /* nucleus pulposus */
  .seg .costal{fill:var(--steel);opacity:.4;pointer-events:none}        /* rib articular facet (thoracic) */
  .seg .uncinate{fill:none;stroke:var(--steel);stroke-width:1.1;opacity:.5;pointer-events:none} /* uncinate (cervical) */
  .seg:not(.active){opacity:.78}
  .seg:hover{opacity:1}
  .seg:hover .vb{fill:#E6ECEB}
  .seg.active{opacity:1;transform:translateX(4px)}
  .seg.active .vb,.seg.active .sacrum{fill:var(--steel)}
  .seg.active .vb{filter:drop-shadow(0 1px 2px rgba(39,64,62,.25))}
  .seg.active .sp{fill:var(--steel-deep);opacity:.85}
  .seg.active .coccyx{stroke:var(--bone)}
  .seg.active .disc{opacity:.55;animation:discPulse 3.4s var(--ease) infinite}
  @keyframes discPulse{0%,100%{opacity:.45}50%{opacity:.7}}
  .spine-stage .spineglow{fill:none;stroke:var(--steel);stroke-width:1;opacity:.14}
  /* draw-in choreography (armed by JS only when motion is allowed) */
  .spine-stage.draw-armed .seg .vb,.spine-stage.draw-armed .seg .sacrum,.spine-stage.draw-armed .spineglow{stroke-dasharray:var(--len,200);stroke-dashoffset:var(--len,200)}
  .spine-stage.draw-in .seg .vb,.spine-stage.draw-in .seg .sacrum,.spine-stage.draw-in .spineglow{stroke-dashoffset:0;transition:stroke-dashoffset .9s var(--ease)}
  .spine-stage.draw-armed .seg .disc,.spine-stage.draw-armed .seg .nucleus,.spine-stage.draw-armed .seg .vhi,.spine-stage.draw-armed .seg .vsh,.spine-stage.draw-armed .seg .facet,.spine-stage.draw-armed .seg .costal,.spine-stage.draw-armed .seg .uncinate,.spine-stage.draw-armed .seg .sp{opacity:0}
  .spine-stage.draw-in .seg .disc,.spine-stage.draw-in .seg .nucleus,.spine-stage.draw-in .seg .vhi,.spine-stage.draw-in .seg .vsh,.spine-stage.draw-in .seg .facet,.spine-stage.draw-in .seg .costal,.spine-stage.draw-in .seg .uncinate,.spine-stage.draw-in .seg .sp{transition:opacity .5s var(--ease) .5s}
  .region-tabs{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:22px}
  .region-tabs button{font:600 13px/1 var(--sans);letter-spacing:.04em;padding:10px 16px;border:1px solid var(--line-strong);background:transparent;color:var(--ink-soft);border-radius:30px;cursor:pointer;transition:background .2s var(--ease),color .2s var(--ease),border-color .2s var(--ease)}
  .region-tabs button[aria-selected="true"]{background:var(--steel-deep);color:#fff;border-color:var(--steel-deep)}
  .region-tabs button:hover{border-color:var(--steel)}
  .region-panel h3{font-size:26px;margin-bottom:4px}
  .region-panel .vrange{font:600 12px/1 var(--sans);letter-spacing:.12em;text-transform:uppercase;color:var(--clay-deep);margin-bottom:18px}
  .region-panel .pcol{display:grid;grid-template-columns:1fr 1fr;gap:30px;margin-top:8px}
  .region-panel h4{font:600 12px/1 var(--sans);letter-spacing:.1em;text-transform:uppercase;color:var(--steel);margin-bottom:12px}
  .region-panel ul{list-style:none}
  .region-panel li{font-size:15.5px;color:var(--ink);padding:7px 0 7px 18px;position:relative;line-height:1.45}
  .region-panel li::before{content:"";position:absolute;left:0;top:14px;width:6px;height:6px;border-radius:50%;background:var(--steel)}
  .region-panel .cond-links a{display:inline-flex;align-items:baseline;gap:6px;color:var(--ink);border-bottom:1px solid transparent;transition:color .2s var(--ease),border-color .2s var(--ease)}
  .region-panel .cond-links a:hover,.region-panel .cond-links a:focus-visible{color:var(--steel-deep);border-bottom-color:var(--line-strong)}
  .region-panel .cond-links .li-go{color:var(--clay-deep);font-weight:600;opacity:0;transform:translateX(-3px);transition:opacity .2s var(--ease),transform .2s var(--ease)}
  .region-panel .cond-links a:hover .li-go,.region-panel .cond-links a:focus-visible .li-go{opacity:1;transform:none}
  .region-symptom{font-size:15.5px;line-height:1.55;color:var(--ink-soft);margin:2px 0 24px;max-width:58ch}
  .region-cta{margin-top:28px}
  /* second-opinion callout */
  .secondop{display:flex;align-items:center;justify-content:space-between;gap:36px;flex-wrap:wrap;background:var(--bone);border:1px solid var(--line-strong);border-left:4px solid var(--clay);border-radius:var(--r-sharp);padding:38px 42px}
  .secondop-text{flex:1 1 420px}
  .secondop-text h2{font-size:clamp(23px,2.9vw,31px);margin:12px 0 0}
  .secondop-text p{color:var(--ink-soft);margin-top:12px;max-width:60ch}
  .secondop-cta{flex:0 0 auto}
  @media (max-width:700px){.secondop{padding:28px 24px;gap:24px}}
  /* FAQ accordion */
  .faq-list{margin-top:var(--space-5);border-top:1px solid var(--line);max-width:820px}
  .faq{border-bottom:1px solid var(--line)}
  .faq summary{list-style:none;cursor:pointer;padding:22px 44px 22px 0;position:relative;font-family:var(--serif);font-size:19px;font-weight:500;color:var(--ink);transition:color .2s var(--ease)}
  .faq summary::-webkit-details-marker{display:none}
  .faq summary::after{content:"+";position:absolute;right:4px;top:50%;transform:translateY(-50%);font-family:var(--sans);font-size:24px;font-weight:400;color:var(--steel);transition:color .2s var(--ease)}
  .faq[open] summary::after{content:"\2013"}
  .faq summary:hover,.faq[open] summary{color:var(--steel-deep)}
  .faq-a{padding:0 44px 24px 0}
  .faq-a p{color:var(--ink-soft);line-height:1.6;max-width:70ch}
  .region-panel.swap{animation:swap .4s var(--ease)}
  @keyframes swap{from{opacity:0;transform:translateY(10px)}to{opacity:1;transform:none}}

  /* ---------- stats ---------- */
  .stats{display:grid;grid-template-columns:repeat(4,1fr);gap:0;border-top:1px solid var(--line);border-bottom:1px solid var(--line);margin-top:0}
  .stat{padding:52px 26px 48px;text-align:center;border-right:1px solid var(--line)}
  .stat .num.num-word{font-style:italic;font-size:clamp(30px,3.4vw,40px);letter-spacing:-.01em}
  .stat:last-child{border-right:none}
  .stat .num{font-family:var(--serif);font-weight:500;font-size:clamp(40px,5vw,56px);line-height:1;color:var(--steel-deep);display:flex;align-items:flex-end;justify-content:center;min-height:56px;min-width:3ch;font-variant-numeric:tabular-nums;font-feature-settings:"tnum" 1}
  .stat .lab{margin-top:12px;font:500 14px/1.4 var(--sans);color:var(--ink-soft)}

  /* ---------- approach quote ---------- */
  .quote blockquote{font-family:var(--serif);font-style:italic;font-weight:400;font-size:clamp(24px,3.2vw,33px);line-height:1.32;color:var(--ink);padding-left:26px;border-left:2px solid var(--steel);text-indent:-.42em;margin-top:var(--space-3)}
  @supports (hanging-punctuation:first){.quote blockquote{hanging-punctuation:first;text-indent:0}}
  .quote .by{font:600 14px/1.4 var(--sans);letter-spacing:.04em;color:var(--steel);text-transform:uppercase}
  .byline{display:flex;align-items:center;gap:14px;margin-top:24px}
  .by-sub{margin-top:3px;font:500 13px/1.4 var(--sans);color:var(--ink-soft)}
  .portrait{display:block;object-fit:cover;object-position:center top;background:var(--paper-2)}
  .portrait-sm{width:60px;height:60px;border-radius:50%;border:1px solid var(--line)}
  /* about-page hero portrait */
  .about-hero{display:grid;grid-template-columns:1fr auto;gap:40px;align-items:center}
  .about-portrait{flex:0 0 auto}
  .about-portrait img{width:150px;height:190px;object-fit:cover;object-position:center top;border-radius:4px;border:1px solid var(--line);box-shadow:0 10px 30px rgba(28,32,36,.10)}
  .about-portrait figcaption{margin-top:10px;font:600 11px/1.3 var(--sans);letter-spacing:.08em;text-transform:uppercase;color:var(--ink-soft);text-align:center}
  @media (max-width:680px){ .about-hero{grid-template-columns:1fr} .about-portrait{order:-1} }
  .quote-wrap{display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:start}
  .quote-note{color:var(--ink-soft);font-size:17px;max-width:46ch}
  .quote-note p+p{margin-top:16px}

  /* ---------- inverted dark ---------- */
  .dark{background:var(--steel-deep);color:var(--bone);position:relative;overflow:hidden}
  .dark .wm{position:absolute;right:-40px;top:50%;transform:translateY(-50%);opacity:.06;pointer-events:none}
  .dark .eyebrow{color:#9DB8B5}
  .dark h2{color:var(--bone);font-size:clamp(28px,3.8vw,40px)}
  .dark-grid{display:grid;grid-template-columns:1fr .8fr;gap:56px;align-items:center;position:relative;z-index:1}
  .why-list{margin-top:30px;display:flex;flex-direction:column;gap:26px}
  .why{display:flex;gap:18px}
  .why .n{font-family:var(--serif);font-style:italic;font-size:30px;color:#BCD2CF;line-height:1;flex:0 0 auto;width:38px}
  .why h3{font-size:20px;color:var(--bone);font-weight:500}
  .why p{margin-top:8px;color:#C9D4D2;font-size:16px;line-height:1.55}
  .dark-spine{display:flex;justify-content:center}
  .dark-spine svg{height:clamp(360px,42vw,470px);width:auto;max-width:100%;display:block}
  .dark-spine .dv{fill:none;stroke:#8FB0AD;opacity:.6}        /* vertebral bodies / sacrum */
  .dark-spine .dsp{fill:#6E9491;opacity:.42;stroke:none}      /* spinous processes */
  .dark-spine .ddisc{fill:var(--clay);opacity:.62;stroke:none} /* intervertebral discs */

  /* ---------- testimonials ---------- */
  .head-link{color:var(--clay-deep);font-weight:600;border-bottom:1px solid transparent;transition:border-color .2s var(--ease)}
  .head-link:hover{border-bottom-color:var(--clay-deep)}
  .tfeature{max-width:840px;margin:var(--space-5) auto 0;text-align:center}
  .tfeature blockquote{font-family:var(--serif);font-style:italic;font-weight:400;font-size:clamp(22px,2.9vw,31px);line-height:1.4;color:var(--ink)}
  @supports (hanging-punctuation:first){.tfeature blockquote{hanging-punctuation:first}}
  .tfeature figcaption{margin-top:20px;font:600 12px/1.4 var(--sans);letter-spacing:.1em;text-transform:uppercase;color:var(--steel-deep)}
  .tfeature figcaption span{color:var(--ink-soft);text-transform:none;letter-spacing:.02em;font-weight:500}
  .tcards{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;margin-top:var(--space-5)}
  .tcard{background:var(--bone);border:1px solid var(--line);border-radius:var(--r-sharp);padding:26px;box-shadow:var(--shadow-1);display:flex;flex-direction:column;gap:16px;transition:box-shadow .25s var(--ease),transform .25s var(--ease)}
  .tcard:hover{box-shadow:var(--shadow-2);transform:translateY(-2px)}
  .tcard blockquote{font-family:var(--serif);font-style:italic;font-size:17px;line-height:1.5;color:var(--ink)}
  .tcard blockquote::before{content:"\201C";display:block;font-family:var(--serif);font-size:42px;line-height:.1;color:var(--clay);opacity:.55;margin:6px 0 10px}
  .tcard figcaption{margin-top:auto;font:600 13px/1.3 var(--sans);color:var(--steel-deep)}
  .tcard figcaption span{color:var(--ink-soft);font-weight:500}
  @media (max-width:760px){.tcards{grid-template-columns:1fr}}
  .tnotable{margin-top:24px;background:var(--steel-deep);color:var(--bone);border-radius:var(--r-sharp);padding:30px 32px;display:flex;flex-direction:column;gap:12px;box-shadow:var(--shadow-2)}
  .tnotable-badge{font:600 11px/1 var(--sans);letter-spacing:.12em;text-transform:uppercase;color:#9DB8B5}
  .tnotable blockquote{font-family:var(--serif);font-style:italic;font-size:clamp(20px,2.4vw,26px);line-height:1.4;color:var(--bone)}
  .tnotable-who{font:500 14px/1.55 var(--sans);color:#C9D4D2;max-width:74ch}
  .tnotable-who b{color:var(--bone);font-weight:600}

  /* ---------- timeline ---------- */
  .timeline{margin-top:var(--space-5);border-left:1px solid var(--line)}
  .tl{display:grid;grid-template-columns:140px 1fr;gap:24px;padding:20px 0 20px 28px;position:relative;border-bottom:1px solid var(--line)}
  .tl:last-child{border-bottom:none}
  .tl::before{content:"";position:absolute;left:-5px;top:28px;width:9px;height:9px;border-radius:50%;background:var(--steel);border:2px solid var(--paper)}
  .tl .yr{font:600 13px/1.4 var(--sans);letter-spacing:.06em;text-transform:uppercase;color:var(--steel)}
  .tl .ev h3{font-size:18px;font-weight:500}
  .tl .ev p{font-size:15px;color:var(--ink-soft);margin-top:4px}

  /* ---------- locations ---------- */
  .loc-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;margin-top:var(--space-5)}
  .loc{border:1px solid var(--line);background:var(--bone);padding:26px;border-radius:var(--r-sharp);transition:transform .25s var(--ease),box-shadow .25s var(--ease)}
  .loc:hover{transform:translateY(-4px);box-shadow:var(--shadow-3)}
  .loc h3{font-size:20px;font-weight:500}
  .loc address{font-style:normal;color:var(--ink-soft);font-size:15.5px;margin-top:10px;line-height:1.6}
  .loc .maplink{display:inline-block;margin-top:14px;font:600 14px/1 var(--sans);color:var(--steel)}
  .loc .maplink:hover{text-decoration:underline}

  /* ---------- contact ---------- */
  .appt-grid{display:grid;grid-template-columns:1fr 1fr;gap:54px;align-items:start}
  .appt-info p{color:var(--ink-soft);margin-top:16px;max-width:42ch}
  .contact-rows{margin-top:26px;display:flex;flex-direction:column}
  .crow{display:flex;gap:14px;align-items:baseline;padding:14px 0;border-top:1px solid var(--line)}
  .crow .k{font:600 12px/1 var(--sans);letter-spacing:.12em;text-transform:uppercase;color:var(--steel);width:96px;flex:0 0 auto}
  .crow .v{font-size:17px;min-width:0;overflow-wrap:anywhere}
  .crow .v a{color:var(--ink);border-bottom:1px solid var(--line)}
  .crow .v a:hover{border-color:var(--ink)}
  form.appt{background:var(--bone);border:1px solid var(--line);border-radius:3px;padding:30px}
  form.appt .field-err{color:#8E2F22;font:500 13px/1.4 var(--sans);margin-top:6px}
  form.appt [aria-invalid="true"]{border-color:#8E2F22;box-shadow:0 0 0 3px rgba(142,47,34,.12)}
  form.appt label{display:block;font:600 13px/1 var(--sans);letter-spacing:.06em;text-transform:uppercase;color:var(--ink-soft);margin:0 0 8px}
  form.appt .field{margin-bottom:18px}
  form.appt input,form.appt select,form.appt textarea{width:100%;font:400 16px/1.4 var(--sans);color:var(--ink);background:var(--paper);border:1px solid var(--line-strong);border-radius:2px;padding:12px 14px;transition:border-color .2s,box-shadow .2s}
  form.appt input:focus,form.appt select:focus,form.appt textarea:focus{outline:none;border-color:var(--steel);box-shadow:0 0 0 3px rgba(62,92,90,.20)}
  form.appt .row2{display:grid;grid-template-columns:1fr 1fr;gap:14px}
  form.appt .consent{font-size:13px;color:var(--ink-soft);margin-top:4px;line-height:1.5}
  .form-ok{display:none;background:var(--steel-deep);color:var(--bone);padding:22px;border-radius:3px;font-size:16px;line-height:1.55}
  .form-ok.show{display:block;animation:swap .4s var(--ease)}

  /* ---------- footer ---------- */
  footer.site{background:var(--ink);color:#C6C8C5;padding:0 0 38px;font-size:14.5px;border-top:3px solid var(--clay-deep)}
  footer.site a{color:#C6C8C5;transition:color .2s var(--ease)} footer.site a:hover{color:#fff}
  footer.site ul{list-style:none} footer.site li{margin-bottom:9px}
  footer.site h4{font-family:var(--serif);color:#fff;font-size:18px;font-weight:500;margin-bottom:14px}
  /* footer CTA band */
  .foot-cta{display:flex;align-items:center;gap:26px;flex-wrap:wrap;padding:44px 0 38px;border-bottom:1px solid #34373B}
  .foot-cta .foot-mark{flex:0 0 auto;color:#5C7C79}
  .foot-cta-text h3{font-family:var(--serif);font-weight:500;color:#fff;font-size:clamp(23px,2.7vw,31px);line-height:1.08;letter-spacing:-.01em}
  .foot-cta-text p{color:#9CA0A3;margin-top:7px;font-size:15px}
  .foot-cta-actions{margin-left:auto;display:flex;gap:12px;flex-wrap:wrap}
  .btn-on-dark-ghost{background:transparent;color:#fff;border-color:#4A4E52}
  .btn-on-dark-ghost:hover{border-color:#fff;background:rgba(255,255,255,.04)}
  /* footer columns */
  footer.site .ftop{display:grid;grid-template-columns:1.7fr 1fr 1.2fr;gap:40px;padding:40px 0 30px;border-bottom:1px solid #34373B}
  .fbrand{display:flex;align-items:center;gap:10px;font-family:var(--serif);font-size:21px;color:#fff;margin-bottom:15px}
  .fbrand b{font-weight:600}
  .fcol-brand p{color:#9CA0A3;line-height:1.6}
  .fpart{margin-top:13px;font:600 11px/1.4 var(--sans)!important;letter-spacing:.11em;text-transform:uppercase;color:#9CA0A3}
  .fdisc{margin-top:26px;font-size:12.5px;color:#8A8D90;line-height:1.6;max-width:96ch}
  .fbar{margin-top:22px;font-size:12.5px;color:#8A8D90;display:flex;justify-content:space-between;align-items:center;gap:18px;flex-wrap:wrap}
  .flegal{display:flex;gap:20px;flex-wrap:wrap}
  .flegal a{color:#9CA0A3;border-bottom:1px solid transparent;padding-bottom:1px}
  .flegal a:hover{color:#fff;border-bottom-color:#4A4E52}

  /* ---------- front-desk assistant ---------- */
  .fd-launch{position:fixed;right:22px;bottom:22px;z-index:120;display:inline-flex;align-items:center;gap:10px;background:var(--steel-deep);color:#fff;border:none;border-radius:40px;padding:14px 20px;cursor:pointer;font:600 15px/1 var(--sans);box-shadow:0 6px 26px rgba(28,32,36,.22);transition:transform .2s var(--ease),background .2s}
  .fd-launch:hover{background:var(--steel);transform:translateY(-2px)}
  .fd-panel{position:fixed;right:22px;bottom:22px;z-index:130;width:370px;max-width:calc(100vw - 32px);height:540px;max-height:calc(100vh - 40px);background:var(--bone);border:1px solid var(--line);border-radius:12px;box-shadow:0 18px 60px rgba(28,32,36,.28);display:none;flex-direction:column;overflow:hidden}
  .fd-panel.open{display:flex;animation:swap .3s var(--ease)}
  .fd-head{background:var(--steel-deep);color:#fff;padding:16px 18px;display:flex;align-items:center;justify-content:space-between}
  .fd-head .t{font:600 15px/1.3 var(--sans)}
  .fd-head .s{font:400 12px/1.3 var(--sans);color:#AFC4C2;margin-top:2px}
  .fd-head button{background:none;border:none;color:#AFC4C2;font-size:22px;cursor:pointer;line-height:1}
  .fd-body{flex:1;overflow-y:auto;padding:18px;display:flex;flex-direction:column;gap:12px}
  .fd-msg{max-width:84%;padding:11px 14px;border-radius:12px;font-size:15px;line-height:1.5;animation:swap .3s var(--ease)}
  .fd-msg.bot{background:var(--paper-2);color:var(--ink);align-self:flex-start;border-bottom-left-radius:3px}
  .fd-msg.user{background:var(--steel);color:#fff;align-self:flex-end;border-bottom-right-radius:3px}
  .fd-foot{border-top:1px solid var(--line);padding:12px;display:flex;gap:8px}
  .fd-foot input{flex:1;font:400 15px/1.3 var(--sans);border:1px solid var(--line-strong);border-radius:20px;padding:10px 14px}
  .fd-foot input:focus{outline:none;border-color:var(--steel)}
  .fd-foot button{background:var(--steel-deep);color:#fff;border:none;border-radius:20px;padding:0 16px;cursor:pointer;font:600 14px/1 var(--sans)}
  .fd-note{font-size:11.5px;color:var(--ink-soft);text-align:center;padding:0 12px 10px}
  /* progressive-enhancement fallback: if JS never loads, show full nav instead of a dead toggle */
  html:not(.js) .menu-toggle{display:none}
  @media (max-width:860px){ html:not(.js) .navlinks{display:flex;position:static;flex-direction:column;gap:0;background:var(--paper);border-bottom:1px solid var(--line)} html:not(.js) .navlinks a{padding:14px 28px;width:100%} }

  /* ---------- responsive ---------- */
  @media (max-width:1080px){ .spine-bg{display:none} }
  @media (max-width:860px){
    .navlinks{display:none}
    .navlinks.open{display:flex;position:absolute;top:74px;left:0;right:0;background:var(--paper);flex-direction:column;gap:0;padding:8px 0;border-bottom:1px solid var(--line)}
    .navlinks.open a{padding:14px 28px;width:100%}
    .menu-toggle{display:block}
    .nav-cta .btn{display:none}
    .nav{gap:12px}
    .brand{font-size:18px;gap:8px}
    .nav-cta{gap:10px}
    .nav-phone{font-size:14px}
    .hero-grid,.quote-wrap,.dark-grid,.appt-grid{grid-template-columns:1fr}
    .hero-art{display:none}
    .creds .wrap{flex-direction:column}
    .creds .chip{flex:0 0 auto;border-right:none;border-bottom:1px solid var(--line);text-align:left}
    .creds .chip:last-child{border-bottom:none}
    .crow .v{overflow-wrap:anywhere}
    .cond-grid{grid-template-columns:1fr}
    .cond:nth-child(odd){border-right:none;padding-right:28px;padding-left:28px}
    .explore-grid{grid-template-columns:1fr;gap:30px}
    .spine-stage{order:-1}
    .region-panel .pcol{grid-template-columns:1fr;gap:20px}
    .stats{grid-template-columns:1fr 1fr}
    .stat{border-right:none;border-bottom:1px solid var(--line)}
    .stat:nth-child(odd){border-right:1px solid var(--line)}
    .loc-grid{grid-template-columns:1fr}
    .tl{grid-template-columns:100px 1fr}
    footer.site .ftop{grid-template-columns:1fr 1fr;gap:28px}
    .fcol-brand{grid-column:1 / -1}
    .foot-cta{flex-direction:column;align-items:flex-start;gap:18px}
    .foot-cta-actions{margin-left:0;width:100%}
    .foot-cta-actions .btn{flex:1;justify-content:center}
    .fbar{justify-content:flex-start}
    .dark-spine,.dark .wm{display:none}
  }
  @media (max-width:520px){ footer.site .ftop{grid-template-columns:1fr} }
  .mobile-cta{display:none}
  @media (max-width:860px){
    .mobile-cta{display:flex;position:fixed;left:0;right:0;bottom:0;z-index:115;background:var(--paper);border-top:1px solid var(--line);padding:10px 14px calc(10px + env(safe-area-inset-bottom));gap:10px}
    .mobile-cta a{flex:1;justify-content:center}
    body{padding-bottom:74px}
    .fd-launch{bottom:84px}
    .fd-panel{bottom:84px}
  }
  @media (prefers-reduced-motion: reduce){
    *{animation:none !important;scroll-behavior:auto !important;transition:none !important}
    .reveal{opacity:1;transform:none;transition:none}
  }

/* ---------- sub-pages (about / research / conditions / contact) ---------- */
.page-hero{padding:62px 0 6px}
.page-hero .eyebrow{margin-bottom:14px}
.page-hero h1{font-size:clamp(34px,4.8vw,54px);line-height:1.03;letter-spacing:-.022em}
.page-hero p.lead{margin-top:18px;max-width:62ch;color:var(--ink-soft);font-size:19px;line-height:1.55}
.prose{max-width:74ch}
.prose h2{font-size:clamp(23px,2.8vw,31px);margin:64px 0 4px;letter-spacing:-.01em;padding-top:30px;border-top:1px solid var(--line);scroll-margin-top:96px}
.prose h2:first-child{margin-top:0;padding-top:0;border-top:none}
.cond-jump{display:flex;flex-wrap:wrap;gap:10px}
.cond-jump a{font:500 13.5px/1 var(--sans);color:var(--steel-deep);border:1px solid var(--line);border-radius:20px;padding:9px 15px;transition:background .2s var(--ease),border-color .2s var(--ease)}
.cond-jump a:hover{background:var(--bone);border-color:var(--steel)}
.prose h3{font-size:19px;margin:30px 0 4px}
.prose p{margin:12px 0;color:var(--ink);line-height:1.66}
.prose em{color:var(--ink-soft)}
.prose ul{list-style:none;margin:14px 0 6px}
.prose li{position:relative;padding:8px 0 8px 22px;line-height:1.55;color:var(--ink)}
.prose li::before{content:"";position:absolute;left:2px;top:16px;width:6px;height:6px;background:var(--steel);border-radius:1px;transform:rotate(45deg)}
.prose li em{display:inline}
.trial-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px;margin-top:40px}
.trial{border:1px solid var(--line);background:var(--bone);border-radius:var(--r-sharp);padding:24px;transition:transform .25s var(--ease),box-shadow .25s var(--ease)}
.trial:hover{transform:translateY(-3px);box-shadow:var(--shadow-3)}
.trial .st{display:inline-flex;align-items:center;gap:5px;font:600 11px/1 var(--sans);letter-spacing:.1em;text-transform:uppercase;padding:5px 11px;border-radius:2px;background:var(--paper-2);color:var(--steel-deep);margin-bottom:13px}
.trial .st.rec{background:#F0E2D9;color:var(--clay-deep)}
.trial .nct{font:600 12px/1.3 var(--sans);letter-spacing:.04em;color:var(--steel-deep);margin-top:8px}
.trial h3{font-size:18px;font-weight:500}
.trial p{font-size:14.5px;color:var(--ink-soft);line-height:1.55;margin-top:9px}
.trial .role{font-size:13px;color:var(--ink);margin-top:11px}
.trial a.tlink{display:inline-block;margin-top:13px;font:600 13px/1 var(--sans);color:var(--clay-deep)}
.trial a.tlink:hover{text-decoration:underline}
@media (max-width:860px){ .trial-grid{grid-template-columns:1fr} .page-hero{padding-top:44px} }