@font-face{font-family:'Inter Tight';font-style:normal;font-weight:400 700;font-display:swap;src:url('/assets/fonts/inter-tight-latin.woff2') format('woff2');unicode-range:U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+0304,U+0308,U+0329,U+2000-206F,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD}
@font-face{font-family:'Inter Tight';font-style:normal;font-weight:400 700;font-display:swap;src:url('/assets/fonts/inter-tight-latin-ext.woff2') format('woff2');unicode-range:U+0100-02BA,U+02BD-02C5,U+02C7-02CC,U+02CE-02D7,U+02DD-02FF,U+0304,U+0308,U+0329,U+1D00-1DBF,U+1E00-1E9F,U+1EF2-1EFF,U+2020,U+20A0-20AB,U+20AD-20C0,U+2113,U+2C60-2C7F,U+A720-A7FF}
@font-face{font-family:'Inter Tight';font-style:normal;font-weight:400 700;font-display:swap;src:url('/assets/fonts/inter-tight-greek.woff2') format('woff2');unicode-range:U+0370-0377,U+037A-037F,U+0384-038A,U+038C,U+038E-03A1,U+03A3-03FF}
@font-face{font-family:'Inter';font-style:normal;font-weight:400 700;font-display:swap;src:url('/assets/fonts/inter-latin.woff2') format('woff2');unicode-range:U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+0304,U+0308,U+0329,U+2000-206F,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD}
@font-face{font-family:'Inter';font-style:normal;font-weight:400 700;font-display:swap;src:url('/assets/fonts/inter-latin-ext.woff2') format('woff2');unicode-range:U+0100-02BA,U+02BD-02C5,U+02C7-02CC,U+02CE-02D7,U+02DD-02FF,U+0304,U+0308,U+0329,U+1D00-1DBF,U+1E00-1E9F,U+1EF2-1EFF,U+2020,U+20A0-20AB,U+20AD-20C0,U+2113,U+2C60-2C7F,U+A720-A7FF}
@font-face{font-family:'JetBrains Mono';font-style:normal;font-weight:400 700;font-display:swap;src:url('/assets/fonts/jetbrains-mono-latin.woff2') format('woff2');unicode-range:U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+0304,U+0308,U+0329,U+2000-206F,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD}
@font-face{font-family:'JetBrains Mono';font-style:normal;font-weight:400 700;font-display:swap;src:url('/assets/fonts/jetbrains-mono-latin-ext.woff2') format('woff2');unicode-range:U+0100-02BA,U+02BD-02C5,U+02C7-02CC,U+02CE-02D7,U+02DD-02FF,U+0304,U+0308,U+0329,U+1D00-1DBF,U+1E00-1E9F,U+1EF2-1EFF,U+2020,U+20A0-20AB,U+20AD-20C0,U+2113,U+2C60-2C7F,U+A720-A7FF}

/* ============================================================
   Atrio Sciences — site stylesheet (v2).
   One motif: the amino-acid chain drawn as a skeletal formula.
   Warm-neutral monochrome; the only accent is oxygen (terracotta),
   used on the carbonyl atoms of that drawing and nowhere else.
   ============================================================ */

:root{
  --ink:#0A0A0A; --ink-2:#151514;
  --text-2:#4A4A45; --muted:#6B6B66; --faint:#9A9A94;
  --line:#E6E5E0; --line-strong:#CFCEC8;
  --white:#FFFFFF; --bone:#F5F4F1; --mist:#FAFAF8;
  --terra:#C84B1F;
  --on-dark:#FFFFFF; --on-dark-2:rgba(255,255,255,.72); --on-dark-line:rgba(255,255,255,.18);

  --font-display:-apple-system,BlinkMacSystemFont,"Inter Tight","Helvetica Neue",sans-serif;
  --font-body:-apple-system,BlinkMacSystemFont,"Inter","Helvetica Neue",sans-serif;
  --font-mono:ui-monospace,"JetBrains Mono",Menlo,monospace;

  --ease:cubic-bezier(.16,1,.3,1);
  --container:1240px; --gutter:clamp(20px,4vw,40px); --y:clamp(80px,10vw,148px);
  --skel-bg:var(--white);
}

*,*::before,*::after{box-sizing:border-box}
*{margin:0;padding:0}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{font-family:var(--font-body);font-size:17px;line-height:1.65;letter-spacing:-.011em;color:var(--ink);
  background:var(--white);-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility;
  font-feature-settings:"ss01","cv05";overflow-x:hidden}
img,svg{display:block;max-width:100%}
a{color:inherit;text-decoration:none}
::selection{background:var(--ink);color:var(--white)}
::placeholder{color:var(--faint)}
:focus-visible{outline:2px solid var(--ink);outline-offset:3px;border-radius:3px}
.sec--ink :focus-visible{outline-color:var(--white)}
html{scrollbar-color:var(--line-strong) var(--white)}
::-webkit-scrollbar{width:11px}
::-webkit-scrollbar-thumb{background:var(--line-strong);border-radius:10px;border:3px solid var(--white)}
button,input,select,textarea{font-family:var(--font-body);color:var(--ink)}

.wrap{max-width:var(--container);margin:0 auto;padding:0 var(--gutter)}
.sec{padding:var(--y) 0}
.sec--bone{background:var(--bone)}
.sec--ink{background:var(--ink);color:var(--on-dark);--skel-bg:var(--ink);position:relative;overflow:hidden}
.sec--tight{padding:clamp(56px,6vw,88px) 0}

/* ---------- Type ---------- */
.h1{font-family:var(--font-display);font-weight:600;font-size:clamp(44px,7.2vw,96px);line-height:1;letter-spacing:-.04em;text-wrap:balance}
.h2{font-family:var(--font-display);font-weight:600;font-size:clamp(32px,4.2vw,60px);line-height:1.04;letter-spacing:-.036em;text-wrap:balance}
.h3{font-family:var(--font-display);font-weight:600;font-size:clamp(22px,2.2vw,28px);line-height:1.12;letter-spacing:-.028em}
.lead{font-size:clamp(18px,1.6vw,21px);line-height:1.55;letter-spacing:-.016em;color:var(--text-2);max-width:34em;text-wrap:pretty}
.sec--ink .lead,.sec--ink .body{color:var(--on-dark-2)}
.body{font-size:17px;line-height:1.7;color:var(--text-2);max-width:36em;text-wrap:pretty}
.small{font-size:14.5px;line-height:1.6;color:var(--muted)}
.mono{font-family:var(--font-mono);font-size:12.5px;letter-spacing:.01em;color:var(--muted);font-feature-settings:"tnum"}
.stack{display:flex;flex-direction:column;gap:20px}
.stack--s{gap:12px}
.mt-s{margin-top:24px}.mt-m{margin-top:40px}.mt-l{margin-top:64px}

/* ---------- Brand lockup ---------- */
.lockup{display:inline-flex;align-items:baseline;gap:11px;color:currentColor;line-height:1}
.lockup__mark{flex:none;position:relative;width:16px;height:16px;border:1.5px solid currentColor;display:block;align-self:center}
.lockup__mark::after{content:"";position:absolute;inset:32%;background:currentColor}
.lockup__name{font-family:var(--font-display);font-weight:600;font-size:22px;letter-spacing:-.025em;line-height:1}
.lockup__bar{align-self:baseline;width:1px;height:15px;background:currentColor;opacity:.25;margin-left:2px}
.lockup__qual{font-family:var(--font-body);font-weight:500;font-size:10px;letter-spacing:.22em;text-transform:uppercase;opacity:.6;line-height:1;margin-right:-.22em;transform:translateY(-.42em)}

/* ---------- Buttons ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:10px;height:54px;padding:0 28px;border-radius:10px;
  font-family:var(--font-body);font-size:15px;font-weight:600;letter-spacing:-.005em;cursor:pointer;white-space:nowrap;
  border:1px solid transparent;transition:background .3s var(--ease),color .3s var(--ease),border-color .3s var(--ease),transform .3s var(--ease),box-shadow .3s var(--ease)}
.btn:hover{transform:translateY(-2px)}
.btn svg{transition:transform .3s var(--ease)}
.btn:hover svg{transform:translateX(3px)}
.btn--sm{height:42px;padding:0 20px;font-size:13.5px;border-radius:9px}
.btn--primary{background:var(--ink);color:var(--white);box-shadow:0 1px 2px rgba(10,10,10,.12),0 10px 24px -14px rgba(10,10,10,.55)}
.btn--primary:hover{box-shadow:0 2px 4px rgba(10,10,10,.14),0 18px 34px -16px rgba(10,10,10,.6)}
.btn--line{background:transparent;color:var(--ink);border-color:var(--line-strong)}
.btn--line:hover{border-color:var(--ink)}
.btn--light{background:var(--white);color:var(--ink)}
.btn--light:hover{box-shadow:0 18px 34px -16px rgba(0,0,0,.7)}
.btn--ghost{background:transparent;color:var(--white);border-color:var(--on-dark-line)}
.btn--ghost:hover{border-color:var(--white)}
.btn-row{display:flex;flex-wrap:wrap;gap:12px}
.link{display:inline-flex;align-items:center;gap:10px;font-weight:600;font-size:15px;border-bottom:1px solid var(--line-strong);padding-bottom:3px;transition:border-color .3s var(--ease)}
.link:hover{border-color:currentColor}
.link svg{transition:transform .3s var(--ease)}
.link:hover svg{transform:translateX(3px)}

/* ---------- Header ---------- */
.hdr{position:sticky;top:0;z-index:30;background:rgba(255,255,255,.88);
  backdrop-filter:saturate(180%) blur(18px);-webkit-backdrop-filter:saturate(180%) blur(18px);border-bottom:1px solid var(--line)}
.hdr__bar{height:76px;display:flex;align-items:center;justify-content:space-between;gap:24px}
.nav{display:flex;align-items:center;gap:30px}
.nav__link{font-size:14.5px;color:var(--text-2);padding:6px 0;border-bottom:1px solid transparent;transition:color .25s var(--ease)}
.nav__link:hover{color:var(--ink)}
.nav__link[aria-current="page"]{color:var(--ink);font-weight:600;border-bottom-color:var(--ink)}
.burger{display:none;align-items:center;justify-content:center;width:44px;height:44px;background:none;border:1px solid var(--line-strong);border-radius:10px;cursor:pointer}
.menu{display:none;border-top:1px solid var(--line);background:var(--white)}
.menu.is-open{display:block}
.menu__inner{padding:8px var(--gutter) 26px;display:flex;flex-direction:column}
.menu__link{font-family:var(--font-display);font-size:22px;font-weight:600;letter-spacing:-.03em;padding:16px 0;border-bottom:1px solid var(--line)}
.menu .btn{margin-top:22px}

/* ---------- Hero + the chain motif ---------- */
.hero{padding-top:clamp(56px,8vw,116px);overflow:hidden}
.hero__lead{margin-top:clamp(24px,3vw,40px)}
.hero .btn-row{margin-top:clamp(28px,3.4vw,44px)}
.skel{--stroke:var(--ink);--branch:var(--muted);margin-top:clamp(40px,6vw,84px);
  -webkit-mask-image:linear-gradient(90deg,transparent,#000 9%,#000 91%,transparent);
  mask-image:linear-gradient(90deg,transparent,#000 9%,#000 91%,transparent);overflow:hidden}
.skel svg{width:100%;min-width:1040px;height:auto}
.skel--dark{--stroke:var(--white);--branch:rgba(255,255,255,.55)}
.skel--mini{margin-top:clamp(28px,4vw,56px)}
.skel--mini svg{min-width:760px}
.skel .bb{fill:none;stroke:var(--stroke);stroke-width:1.7;stroke-linejoin:round;stroke-linecap:round}
.skel .br{fill:none;stroke:var(--branch);stroke-width:1.5;stroke-linecap:round}
.skel .bo{fill:none;stroke:var(--terra);stroke-width:1.5;stroke-linecap:round}
.skel .halo{fill:var(--skel-bg)}
.skel text{font-family:var(--font-body);font-size:15px;font-weight:500;text-anchor:middle;dominant-baseline:central;fill:var(--stroke)}
.skel .tr{fill:var(--terra)}
.skel .tm{fill:var(--branch);font-style:italic;font-weight:400}
.skel--mini text{font-size:13px}
@media (prefers-reduced-motion:no-preference){
  .skel .bb{stroke-dasharray:1;stroke-dashoffset:1;animation:draw 2.6s var(--ease) .25s forwards}
  .skel .at{opacity:0;animation:fade .9s var(--ease) forwards;animation-delay:calc(.45s + var(--i) * 55ms)}
  @keyframes draw{to{stroke-dashoffset:0}}
  @keyframes fade{to{opacity:1}}
  @keyframes up{from{opacity:0;transform:translateY(14px)}to{opacity:1;transform:none}}
  .up{animation:up .9s var(--ease) both}
  .d1{animation-delay:.06s}.d2{animation-delay:.12s}.d3{animation-delay:.18s}
}
.sec--ink .skel{position:absolute;left:0;right:0;bottom:0;margin:0;opacity:.22;pointer-events:none}
.sec--skel{padding-bottom:calc(var(--y) + max(200px,15vw))}

/* ---------- Home hero: copy + α-helix viewer (assets/helix.js) ---------- */
.hero--split{padding-top:clamp(28px,3.6vw,52px)}
.hero__grid{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1.06fr);gap:clamp(28px,4vw,64px);align-items:center}
.hero--split .h1{font-size:clamp(40px,5.3vw,76px);line-height:1.02;letter-spacing:-.038em;max-width:9.6em}
.hero--split .hero__lead{margin-top:clamp(20px,2.2vw,30px);max-width:31em}
.hero--split .btn-row{margin-top:clamp(24px,2.6vw,34px)}
.helix{margin:0;min-width:0}
.helix__stage{position:relative;height:clamp(460px,calc(100svh - 200px),700px)}
.helix__cv{position:absolute;inset:0;width:100%;height:100%;display:block;touch-action:pan-y;cursor:grab;
  -webkit-tap-highlight-color:transparent;-webkit-user-select:none;user-select:none}
.helix.is-drag .helix__cv{cursor:grabbing}
.helix__fb{position:absolute;inset:0;display:grid;align-content:center;overflow:hidden}
.helix__fb .skel{margin:0}
.js .helix__fb{display:none}
.js .helix--fallback .helix__fb{display:grid}
.helix--fallback .helix__cv{display:none}
.helix__cap{font-size:13px;line-height:1.5;letter-spacing:-.005em;color:var(--muted);text-align:right;margin-top:6px}
.hero--split .facts{margin-top:clamp(36px,4.6vw,68px)}
@media (max-width:900px){
  .hero__grid{grid-template-columns:1fr;gap:clamp(20px,5vw,36px)}
  .hero--split .h1{max-width:11em}
  .helix__stage{height:auto;aspect-ratio:1/1.05}
  .helix__cap{text-align:left}
}

/* ---------- Facts strip ---------- */
.facts{display:grid;grid-template-columns:repeat(3,1fr);border-top:1px solid var(--line)}
.facts>div{padding:30px 40px 34px 0}
.facts>div+div{padding-left:32px;border-left:1px solid var(--line)}
.facts b{display:block;font-family:var(--font-display);font-size:19px;font-weight:600;letter-spacing:-.022em;margin-bottom:8px}
.facts p{font-size:15.5px;line-height:1.55;color:var(--text-2);max-width:26em}

/* ---------- Layout helpers ---------- */
.cols{display:grid;grid-template-columns:5fr 7fr;gap:clamp(40px,7vw,120px);align-items:start}
.cols--even{grid-template-columns:1fr 1fr}
.sticky{position:sticky;top:116px}
.cols>*{min-width:0}

/* Spec rows: materials described like a data sheet */
.spec{border-bottom:1px solid var(--line)}
.spec__row{padding:38px 0 40px;border-top:1px solid var(--line);display:grid;gap:14px}
.spec__row p{color:var(--text-2);max-width:34em}
.spec__meta{font-family:var(--font-mono);font-size:12.5px;color:var(--muted);letter-spacing:.01em;display:flex;flex-wrap:wrap;gap:6px 0}
.spec__meta span+span::before{content:"·";margin:0 10px;color:var(--faint)}

/* Definition list */
.defs>div{display:grid;grid-template-columns:minmax(170px,.4fr) 1fr;gap:12px 36px;padding:24px 0;border-top:1px solid var(--line)}
.defs>div:last-child{border-bottom:1px solid var(--line)}
.defs dt{font-family:var(--font-display);font-weight:600;font-size:19px;letter-spacing:-.022em;line-height:1.25}
.defs dd{color:var(--text-2);font-size:16.5px;line-height:1.65;max-width:36em}
.sec--bone .defs>div,.sec--bone .defs>div:last-child{border-color:var(--line-strong)}

/* Key/value register */
.kv>div{display:grid;grid-template-columns:minmax(200px,.42fr) 1fr;gap:10px 36px;padding:20px 0;border-top:1px solid var(--line)}
.kv>div:last-child{border-bottom:1px solid var(--line)}
.kv dt{font-size:14.5px;color:var(--muted)}
.kv dd{font-family:var(--font-mono);font-size:14.5px;line-height:1.6;white-space:pre-line;font-feature-settings:"tnum"}

/* Statement trio */
.trio{display:grid;grid-template-columns:repeat(3,1fr)}
.trio>div{padding:6px 44px 6px 0}
.trio>div+div{padding-left:36px;border-left:1px solid var(--line-strong)}
.trio .h3{font-size:clamp(26px,2.7vw,38px);line-height:1.06;letter-spacing:-.032em;text-wrap:balance}
.trio p{margin-top:20px;color:var(--text-2);font-size:16.5px;line-height:1.65}

/* Process: nodes on a line, like residues on a chain */
.steps{list-style:none;counter-reset:s}
.steps li{position:relative;padding:0 0 38px 68px}
.steps li:last-child{padding-bottom:0}
.steps li::before{content:"";position:absolute;left:17px;top:40px;bottom:6px;width:1px;background:currentColor;opacity:.22}
.steps li:last-child::before{display:none}
.steps__n{position:absolute;left:0;top:0;width:35px;height:35px;border:1px solid currentColor;border-radius:50%;
  display:grid;place-items:center;font-family:var(--font-mono);font-size:12.5px}
.steps h3{font-family:var(--font-display);font-size:23px;font-weight:600;letter-spacing:-.025em;line-height:1.2;padding-top:3px}
.steps p{margin-top:8px;color:var(--text-2);max-width:30em;font-size:16.5px}
.sec--ink .steps p{color:var(--on-dark-2)}

/* Page hero (inner pages) */
.phero{padding-top:clamp(52px,7vw,100px);overflow:hidden}
.phero .h1{font-size:clamp(40px,5.8vw,80px);max-width:13em}
.phero .lead{margin-top:clamp(22px,2.6vw,34px)}
.phero .btn-row{margin-top:clamp(26px,3vw,38px)}

/* Closing call to action */
.cta .h2{max-width:14em}
.cta .btn-row{margin-top:38px}
.cta__mail{margin-top:30px;font-size:16px;color:var(--on-dark-2)}
.cta__mail a{border-bottom:1px solid var(--on-dark-line);padding-bottom:2px;font-weight:600;color:var(--white)}

/* Notice */
.notice{border-top:1.5px solid var(--ink);padding-top:26px;max-width:46em;display:grid;gap:12px}

/* Contact desk */
.desk{display:grid;grid-template-columns:1.1fr .9fr;gap:clamp(32px,6vw,96px);align-items:end;padding:clamp(28px,4vw,56px) 0;border-top:1.5px solid var(--ink);border-bottom:1px solid var(--line)}
.desk__mail{font-family:var(--font-display);font-weight:600;font-size:clamp(26px,4vw,52px);letter-spacing:-.036em;line-height:1.05;border-bottom:1px solid var(--line-strong);padding-bottom:6px;display:inline-block;overflow-wrap:anywhere}

/* Forms */
.form{display:grid;gap:20px}
.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:20px}
.form-grid>*,.form>*{min-width:0}
.field{display:flex;flex-direction:column;gap:9px}
.field__l{font-size:13.5px;font-weight:600;color:var(--text-2)}
.input{width:100%;height:52px;padding:0 16px;background:var(--white);border:1px solid var(--line-strong);border-radius:10px;
  font-size:16px;color:var(--ink);outline:none;transition:border-color .25s var(--ease),box-shadow .25s var(--ease)}
.input:hover{border-color:var(--faint)}
.input:focus{border-color:var(--ink);box-shadow:0 0 0 4px rgba(10,10,10,.08)}
textarea.input{height:auto;padding:15px 16px;line-height:1.6;resize:vertical;min-height:150px}
select.input{appearance:none;background-image:linear-gradient(45deg,transparent 50%,var(--muted) 50%),linear-gradient(135deg,var(--muted) 50%,transparent 50%);
  background-position:calc(100% - 22px) 23px,calc(100% - 17px) 23px;background-size:5px 5px,5px 5px;background-repeat:no-repeat}
.check{display:flex;gap:12px;align-items:flex-start;cursor:pointer}
.check input{margin-top:4px;width:17px;height:17px;accent-color:var(--ink);flex:none}

/* ---------- Footer ---------- */
.foot{background:var(--white);border-top:1px solid var(--line)}
.foot__top{padding-block:clamp(56px,7vw,88px) 56px;display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:48px 32px}
.foot__tag{margin-top:20px;max-width:20em;color:var(--muted);font-size:15px;line-height:1.55}
.foot__t{font-size:13px;font-weight:600;color:var(--muted);margin-bottom:18px}
.foot__links{display:flex;flex-direction:column;gap:12px}
.foot__links a{font-size:15px;color:var(--text-2);transition:color .25s var(--ease)}
.foot__links a:hover{color:var(--ink)}
.foot__legal{background:var(--bone)}
.foot__legal-in{padding-block:36px 42px;display:grid;grid-template-columns:1fr 1.2fr;gap:40px}
.foot__id{font-family:var(--font-mono);font-size:12px;line-height:1.9;color:var(--text-2)}
.foot__note{font-size:13px;line-height:1.7;color:var(--muted)}
.foot__c{margin-top:16px;color:var(--faint)}

/* ---------- Responsive ---------- */
@media (max-width:1080px){
  .nav,.hdr .btn{display:none}
  .burger{display:inline-flex}
}
@media (max-width:900px){
  .cols,.cols--even,.desk{grid-template-columns:1fr;gap:34px}
  .sticky{position:static}
  .facts,.trio{grid-template-columns:1fr}
  .facts>div,.facts>div+div{padding:24px 0;border-left:0}
  .facts>div+div{border-top:1px solid var(--line)}
  .trio>div,.trio>div+div{padding:28px 0;border-left:0}
  .trio>div+div{border-top:1px solid var(--line-strong)}
  .defs>div,.kv>div{grid-template-columns:1fr;gap:8px}
  .foot__top{grid-template-columns:1fr 1fr}
  .foot__top>div:first-child{grid-column:1/-1}
  .foot__legal-in{grid-template-columns:1fr}
}
@media (max-width:640px){
  .form-grid{grid-template-columns:1fr}
  .foot__top{grid-template-columns:1fr}
  .btn-row .btn{width:100%}
}