/* ============================================================
   Pentamer Bio — pentamerbio.com
   Plain HTML + CSS. No build step, no framework, light theme only.
   Tokens follow the Pentamer Bio Brand Guidelines v2.0 (8 Nov 2026).
   ============================================================ */

:root{
  --green:#76B339; --green-600:#4E7A24; --green-700:#3F6320;
  --green-800:#2E4A18; --green-900:#24380F;
  --blue:#1B2F55; --blue-soft:#2A4470; --silver:#A8A9AC;
  --paper:#FFFFFF; --band:#F6F7F5; --leaf:#F2F8EA; --leaf-2:#E8F2D9;
  --clinic:#EEF2F9;
  --ink-body:#3A3D39; --ink-muted:#63685F; --signal:#B4541B;
  --line:rgba(58,61,57,.14); --line-strong:rgba(58,61,57,.32);
  --display:"Jost",-apple-system,"Segoe UI",sans-serif;
  --body:"IBM Plex Sans",-apple-system,"Segoe UI",Roboto,sans-serif;
  --mono:"IBM Plex Mono",ui-monospace,Consolas,monospace;
  --radius:2px; --container:1200px; --reading:760px;
  --shadow:0 6px 20px -12px rgba(30,35,28,.22);
}

*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0; background:var(--paper); color:var(--ink-body);
  font-family:var(--body); font-size:17px; line-height:1.65;
  -webkit-font-smoothing:antialiased;
}
img,svg{display:block; max-width:100%; height:auto}
p{margin:0 0 1em}
p:last-child{margin-bottom:0}
em{font-style:italic}
a{color:var(--green-700)}
a:hover{color:var(--green-800)}
sup{font-size:.62em; font-family:var(--mono)}
:where(a,button,input,select,textarea,label):focus-visible{
  outline:2px solid var(--green); outline-offset:2px}
.wrap{max-width:var(--container); margin:0 auto; padding:0 24px}
.read{max-width:var(--reading)}

/* ---------- type ---------- */
h1,h2,h3,h4{font-family:var(--display); color:var(--green-800);
  font-weight:500; margin:0; letter-spacing:-.01em; text-wrap:balance}
h1{font-weight:400; font-size:clamp(34px,6vw,58px); line-height:1.08}
h2{font-size:clamp(26px,4vw,40px); line-height:1.12}
h3{font-size:clamp(20px,3vw,26px); line-height:1.2}
h4{font-size:18px}
.eyebrow{
  font-family:var(--display); font-weight:600; font-size:13px;
  letter-spacing:.15em; text-transform:uppercase; color:var(--green-700);
  margin:0 0 14px
}
.lede{font-size:clamp(18px,2.4vw,21px); color:var(--ink-body);
  line-height:1.55; max-width:62ch}
.muted{color:var(--ink-muted)}
.mono{font-family:var(--mono); font-size:14px; color:var(--ink-muted)}
.nobr{white-space:nowrap}

/* ---------- header ---------- */
.hdr{
  position:sticky; top:0; z-index:50; background:var(--paper);
  border-bottom:1px solid var(--line);
}
.hdr.scrolled{box-shadow:var(--shadow)}
.hdr-in{
  max-width:var(--container); margin:0 auto; padding:0 24px;
  min-height:76px; display:flex; align-items:center; gap:32px;
}
.brand{display:flex; align-items:center; gap:12px; text-decoration:none; flex:none}
.brand img.wm{height:22px; width:auto}
.nav{margin-left:auto; display:flex; align-items:center; gap:28px}
.nav a{
  font-family:var(--display); font-weight:500; font-size:15px;
  letter-spacing:.02em; text-decoration:none; color:var(--blue);
  padding:6px 0; border-bottom:2px solid transparent;
}
.nav a:hover{color:var(--green-800)}
.nav a[aria-current="page"]{border-bottom-color:var(--green); color:var(--green-800)}
.nav .cta{
  background:var(--green-700); color:#fff; border:0; border-radius:var(--radius);
  font-family:var(--display); font-weight:600; font-size:13px;
  letter-spacing:.1em; text-transform:uppercase;
  padding:12px 20px; min-height:44px; display:inline-flex; align-items:center;
  text-decoration:none; cursor:pointer;
}
.nav .cta:hover{background:var(--green-800); color:#fff}

/* mobile nav sheet */
.navtoggle{display:none}
.navtoggle-label{
  display:none; margin-left:auto; padding:12px; cursor:pointer;
}
.navtoggle-label span{
  display:block; width:22px; height:2px; background:var(--green-800);
  position:relative;
}
.navtoggle-label span::before,.navtoggle-label span::after{
  content:""; position:absolute; left:0; width:22px; height:2px; background:var(--green-800);
}
.navtoggle-label span::before{top:-7px}
.navtoggle-label span::after{top:7px}
.navtoggle:checked ~ .hdr-in .navtoggle-label span{background:transparent}
.navtoggle:checked ~ .hdr-in .navtoggle-label span::before{
  top:0; transform:rotate(45deg)}
.navtoggle:checked ~ .hdr-in .navtoggle-label span::after{
  top:0; transform:rotate(-45deg)}

@media (max-width:900px){
  .hdr-in{flex-wrap:wrap; padding-top:14px; padding-bottom:14px; row-gap:0}
  .navtoggle-label{display:block}
  .nav{
    display:none; order:3; flex-basis:100%; flex-direction:column;
    align-items:stretch; gap:0; margin:14px -24px 0;
    border-top:1px solid var(--line);
  }
  .nav a{
    padding:16px 24px; border-bottom:1px solid var(--green);
    font-size:17px; color:var(--green-800);
  }
  .nav .cta{margin:16px 24px; justify-content:center}
  .navtoggle:checked ~ .hdr-in .nav{display:flex}
}

/* ---------- section scaffolding ---------- */
.sec{padding:clamp(48px,7vw,88px) 0}
.sec.band{background:var(--band)}
.sec.leaf{background:var(--leaf)}
.sec.clinic{background:var(--clinic)}
.sechead{
  display:flex; align-items:baseline; gap:12px;
  border-top:2px solid var(--green); padding-top:12px; margin-bottom:26px;
}
.sechead.blue{border-top-color:var(--blue)}
.sechead .n{font-family:var(--mono); font-size:14px; color:var(--green-600)}
.sechead.blue .n{color:var(--blue)}
.sechead .t{
  font-family:var(--display); font-weight:600; font-size:14px;
  letter-spacing:.15em; text-transform:uppercase; color:var(--green-800);
}
.sechead.blue .t{color:var(--blue)}
.sec h2{margin-bottom:16px}

/* ---------- chips ---------- */
.chip{
  display:inline-flex; align-items:center; gap:8px;
  font-family:var(--display); font-weight:600; font-size:12px;
  letter-spacing:.14em; text-transform:uppercase;
  padding:4px 10px; border-radius:var(--radius); border:1px solid transparent;
}
.chip i{width:8px; height:8px; border-radius:50%; display:inline-block}
.chip.a{background:var(--leaf-2); color:var(--green-700); border-color:rgba(118,179,57,.45)}
.chip.a i{background:var(--green)}
.chip.h{background:var(--clinic); color:var(--blue); border-color:rgba(27,47,85,.3)}
.chip.h i{background:var(--blue)}
.chip.p{background:var(--band); color:var(--green-800); border-color:var(--line-strong)}
.chip.p i{background:var(--green)}
.chip.status{
  background:#FBF1EA; color:var(--signal); border-color:var(--signal);
}
.chip.status i{background:var(--signal)}

/* ---------- key-message banner ---------- */
.banner{
  background:var(--leaf); border-left:4px solid var(--green);
  padding:22px 26px; font-size:clamp(17px,2.2vw,20px); line-height:1.5;
  color:var(--ink-body); max-width:none;
}
.banner.human{background:var(--clinic); border-left-color:var(--blue)}
.banner strong{font-weight:600; color:var(--green-800)}
.banner.human strong{color:var(--blue)}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex; align-items:center; justify-content:center;
  background:var(--green-700); color:#fff; text-decoration:none;
  font-family:var(--display); font-weight:600; font-size:14px;
  letter-spacing:.1em; text-transform:uppercase;
  padding:14px 24px; min-height:44px; border-radius:var(--radius);
  border:1px solid var(--green-700); cursor:pointer;
}
.btn:hover{background:var(--green-800); border-color:var(--green-800); color:#fff}
.btn.sec{
  background:transparent; color:var(--green-800); border:1px solid var(--green-800);
}
.btn.sec:hover{background:var(--leaf); color:var(--green-800)}
.btnrow{display:flex; flex-wrap:wrap; gap:14px; margin-top:28px}

/* ---------- hero ---------- */
.hero{padding:clamp(56px,8vw,104px) 0 clamp(40px,6vw,72px) 0; position:relative; overflow:hidden}
.hero .arcs{
  position:absolute; right:-140px; top:50%; transform:translateY(-50%);
  width:min(560px,60vw); opacity:.07; pointer-events:none;
}
.hero-grid{
  display:grid; grid-template-columns:1.05fr .95fr; gap:48px; align-items:center;
}
@media (max-width:860px){ .hero-grid{grid-template-columns:1fr} }
.hero h1{margin-bottom:20px}
.hero .lede{margin-bottom:8px}

/* ---------- proof strip ---------- */
.proof{
  border-top:1px solid var(--line); border-bottom:1px solid var(--line);
  padding:20px 0;
}
.proof ul{
  list-style:none; margin:0; padding:0; display:grid;
  grid-template-columns:repeat(5,1fr); gap:18px;
}
.proof li{
  font-family:var(--display); font-weight:500; font-size:14.5px;
  color:var(--green-800); text-align:center; line-height:1.35;
  display:flex; align-items:center; justify-content:center; gap:9px;
}
.proof li::before{
  content:""; width:7px; height:7px; border-radius:50%;
  background:var(--green); flex:none;
}
@media (max-width:860px){
  .proof ul{grid-template-columns:repeat(2,1fr); text-align:left}
  .proof li{justify-content:flex-start}
}

/* ---------- two-track cards ---------- */
.tracks{display:grid; grid-template-columns:1fr 1fr; gap:28px}
@media (max-width:860px){ .tracks{grid-template-columns:1fr} }
.track{
  background:var(--leaf); border-top:2px solid var(--green);
  padding:26px 28px;
}
.track.human{background:var(--clinic); border-top-color:var(--blue)}
.track h3{margin:14px 0 10px}
.track.human h3{color:var(--blue)}
.track p{font-size:15.5px}
.track .more{
  display:inline-block; margin-top:14px; font-family:var(--display);
  font-weight:600; font-size:14px; text-decoration:none; color:var(--green-700);
}
.track.human .more{color:var(--blue)}

/* ---------- status line ---------- */
.statusline{
  margin-top:18px; padding:12px 14px; font-size:14px; line-height:1.5;
  color:var(--ink-muted); border:1px dashed var(--line-strong);
  border-radius:var(--radius); background:rgba(255,255,255,.55);
}

/* ---------- result cards ---------- */
.results{display:grid; grid-template-columns:repeat(2,1fr); gap:20px}
@media (max-width:860px){ .results{grid-template-columns:1fr} }
.result{
  background:var(--paper); border:1px solid var(--line);
  border-top:2px solid var(--green); padding:20px 22px;
}
.result.human{border-top-color:var(--blue)}
.result h4{margin-bottom:6px}
.result p{font-size:15px; color:var(--ink-muted)}

/* ---------- stat ---------- */
.stat{
  background:var(--leaf-2); padding:22px 26px; border-radius:var(--radius);
}
.stat .num{
  font-family:var(--display); font-weight:300; font-size:clamp(40px,5vw,58px);
  color:var(--green-800); line-height:1; display:block;
}
.stat .lbl{font-size:15px; color:var(--ink-body); display:block; margin-top:8px}

/* ---------- figure ---------- */
figure{margin:0}
figure svg{width:100%; height:auto}
figcaption{
  font-size:14.5px; color:var(--ink-muted); margin-top:12px; line-height:1.5;
}

/* ---------- two-column split ---------- */
.split{display:grid; grid-template-columns:1fr 1fr; gap:40px; align-items:center}
.split>*{min-width:0}
@media (max-width:860px){ .split{grid-template-columns:1fr} }

/* ---------- platform construct diagram band ---------- */
.diag{
  background:var(--paper); border:1px solid var(--line);
  padding:28px 24px; border-radius:var(--radius);
}
.diag img{width:100%; height:auto}

/* ---------- steps row ---------- */
.steps{display:grid; grid-template-columns:repeat(4,1fr); gap:16px; counter-reset:st}
@media (max-width:860px){ .steps{grid-template-columns:repeat(2,1fr)} }
.step{
  border:1px solid var(--line); background:var(--paper);
  padding:18px 18px 16px; border-radius:var(--radius);
}
.step .n{
  font-family:var(--mono); font-size:13px; color:var(--green-600);
  display:block; margin-bottom:8px;
}
.step b{font-family:var(--display); font-weight:500; font-size:16.5px;
  color:var(--green-800); display:block; margin-bottom:4px}
.step p{font-size:14px; color:var(--ink-muted); margin:0}

/* ---------- team ---------- */
.people{display:grid; grid-template-columns:repeat(3,1fr); gap:24px}
.advisors{display:grid; grid-template-columns:repeat(4,1fr); gap:24px}
@media (max-width:980px){ .advisors{grid-template-columns:repeat(2,1fr)} }
@media (max-width:860px){ .people{grid-template-columns:1fr} }
@media (max-width:560px){ .advisors{grid-template-columns:1fr} }
.person{
  border:1px solid var(--line); background:var(--paper);
  padding:24px; border-radius:var(--radius);
}
.avatar{
  width:76px; height:76px; border-radius:50%;
  background:var(--leaf); color:var(--green-800);
  font-family:var(--display); font-weight:500; font-size:26px;
  display:flex; align-items:center; justify-content:center;
  margin-bottom:16px; letter-spacing:.02em;
}
.person.advisor .avatar{background:var(--band); color:var(--blue)}
.person b{
  font-family:var(--display); font-weight:500; font-size:19px;
  color:var(--green-800); display:block;
}
.person .role{
  font-family:var(--mono); font-size:13px; color:var(--ink-muted);
  display:block; margin:4px 0 10px; line-height:1.45;
}
.person p{font-size:14.5px; color:var(--ink-muted); margin:0}

/* ---------- partner row ---------- */
.partners{
  display:flex; flex-wrap:wrap; gap:10px 12px; align-items:center;
}
.partners span{
  font-family:var(--display); font-weight:500; font-size:15px;
  color:var(--blue); border:1px solid var(--line-strong);
  padding:8px 16px; border-radius:var(--radius); background:var(--paper);
}

/* ---------- contact ---------- */
.contact-grid{display:grid; grid-template-columns:.9fr 1.1fr; gap:48px}
@media (max-width:860px){ .contact-grid{grid-template-columns:1fr} }
.directcard{
  background:var(--leaf); border-left:4px solid var(--green);
  padding:26px 28px;
}
.directcard b{
  font-family:var(--display); font-weight:500; font-size:20px;
  color:var(--green-800); display:block;
}
.directcard .role{font-family:var(--mono); font-size:13px; color:var(--ink-muted);
  display:block; margin:4px 0 14px}
.directcard a.mail{font-size:17px; font-weight:500; text-decoration:none}
.directcard .tel{display:block; margin-top:6px; font-size:16px}

form.netlify-form{display:flex; flex-direction:column; gap:18px}
.field label{
  display:block; font-family:var(--display); font-weight:600; font-size:13px;
  letter-spacing:.08em; text-transform:uppercase; color:var(--green-800);
  margin-bottom:8px;
}
.field input,.field select,.field textarea{
  width:100%; background:var(--paper); border:1px solid var(--line-strong);
  border-radius:var(--radius); padding:12px 14px; min-height:44px;
  font-family:var(--body); font-size:16px; color:var(--ink-body);
}
.field textarea{min-height:130px; resize:vertical}
.formnote{font-size:14px; color:var(--ink-muted)}

/* ---------- footer ---------- */
footer.ftr{
  background:var(--leaf); border-top:2px solid var(--green);
  padding:clamp(40px,6vw,64px) 0 40px; margin-top:0;
}
.ftr-grid{
  display:grid; grid-template-columns:1.4fr 1fr 1fr 1fr; gap:36px;
  padding-bottom:32px;
}
@media (max-width:860px){ .ftr-grid{grid-template-columns:1fr 1fr} }
@media (max-width:560px){ .ftr-grid{grid-template-columns:1fr} }
.ftr-brand img.ic{height:44px; width:auto; margin-bottom:14px}
.ftr-brand b{
  font-family:var(--display); font-weight:500; font-size:17px;
  color:var(--green-800); display:block;
}
.ftr-brand .addr{font-size:14.5px; color:var(--ink-muted); margin-top:6px; line-height:1.6}
.ftr-col h5{
  font-family:var(--display); font-weight:600; font-size:12px;
  letter-spacing:.15em; text-transform:uppercase; color:var(--green-800);
  margin:0 0 14px;
}
.ftr-col a{
  display:block; text-decoration:none; color:var(--ink-body);
  font-size:15px; padding:5px 0;
}
.ftr-col a:hover{color:var(--green-700)}
.ftr-ack{
  font-size:14px; color:var(--ink-muted); border-top:1px solid var(--line);
  padding-top:22px; line-height:1.6;
}
.ftr-legal{
  font-size:14.5px; color:var(--ink-muted); line-height:1.6;
  padding:18px 0; border-top:1px solid var(--line); margin-top:18px;
}
.ftr-bottom{
  border-top:1px solid var(--line); padding-top:18px;
  display:flex; flex-wrap:wrap; gap:12px 24px; justify-content:space-between;
  font-size:14px; color:var(--ink-muted);
}

/* ---------- breadcrumb ---------- */
.crumbs{
  font-family:var(--mono); font-size:13px; color:var(--ink-muted);
  padding:20px 0 0;
}
.crumbs a{color:var(--ink-muted); text-decoration:none}
.crumbs a:hover{color:var(--green-700)}

/* ---------- misc ---------- */
.pagehead{padding:clamp(40px,6vw,72px) 0 clamp(28px,4vw,44px)}
.pagehead .chip{margin-bottom:18px}
.pagehead h1{margin-bottom:18px}
.caveat{
  border-left:3px solid var(--signal); background:#FBF1EA;
  padding:16px 20px; font-size:15px; color:#6E3410; border-radius:var(--radius);
}
.ask{
  background:var(--paper); border:1px solid var(--line);
  border-top:2px solid var(--green); padding:26px 28px;
}
.ask.human{border-top-color:var(--blue)}
.ask h3{margin-bottom:10px}
ul.plain{list-style:none; margin:0; padding:0}
ul.plain li{
  padding-left:22px; position:relative; margin-bottom:10px;
}
ul.plain li::before{
  content:""; position:absolute; left:0; top:.62em; width:8px; height:8px;
  border-radius:50%; background:var(--green);
}
ul.plain.human li::before{background:var(--blue)}
.center{text-align:center}
.skip{
  position:absolute; left:-9999px; top:0; background:var(--paper);
  padding:10px 16px; z-index:100;
}
.skip:focus{left:8px; top:8px}