/* =========================================================
   Algocence — shared stylesheet
   Tokens, layout, navigation, footer, components, forms,
   research library. Page-specific tweaks live in each page.
   ========================================================= */

:root{
  --ink:#071B33; --navy:#03274E; --navy-2:#0B3B6B;
  --gold:#D19D40; --gold-light:#EAC57C; --gold-text:#9A6B1E;
  --paper:#F4F1E9; --paper-2:#ECE6D8; --white:#FBFAF6; --slate:#51606F;
  --line:rgba(3,39,78,0.14); --line-strong:rgba(3,39,78,0.28); --line-light:rgba(244,241,233,0.16);
  --error:#9B2C2C;
  --maxw:1200px; --header-h:58px;
}
*{box-sizing:border-box;}
html{scroll-behavior:smooth; scroll-padding-top:calc(var(--header-h) + 24px);}
body{margin:0; background:var(--paper); color:var(--navy); font-family:'Inter',sans-serif; font-size:16px; line-height:1.6; -webkit-font-smoothing:antialiased;}
@media (prefers-reduced-motion: reduce){
  html{scroll-behavior:auto;}
  *{animation-duration:0.001ms !important; transition-duration:0.001ms !important;}
}
h1,h2,h3,h4{font-family:'Fraunces',serif; font-weight:600; letter-spacing:-0.01em; margin:0; color:var(--navy);}
p{margin:0 0 16px;}
a{color:inherit;}
img{max-width:100%;}
:focus-visible{outline:2px solid var(--gold); outline-offset:3px;}
.wrap{max-width:var(--maxw); margin:0 auto; padding:0 32px;}
.narrow{max-width:840px;}
.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;}
.skip-link{position:absolute; left:16px; top:-60px; z-index:300; background:var(--navy); color:var(--paper); padding:10px 16px; border-radius:2px; text-decoration:none; font-size:14px;}
.skip-link:focus{top:12px;}
.mono{font-family:'IBM Plex Mono',monospace;}

/* ---------- Eyebrow / labels ---------- */
.eyebrow{font-family:'IBM Plex Mono',monospace; font-size:12.5px; letter-spacing:0.16em; text-transform:uppercase; color:var(--gold); font-weight:500; display:flex; align-items:center; gap:10px;}
.eyebrow::before{content:""; width:22px; height:1px; background:var(--gold); display:inline-block;}
.on-dark .eyebrow, .eyebrow.light{color:var(--gold-light);}
.on-dark .eyebrow::before, .eyebrow.light::before{background:var(--gold-light);}
.tag{display:inline-block; align-self:flex-start; font-family:'IBM Plex Mono',monospace; font-size:11px; letter-spacing:.1em; text-transform:uppercase; color:var(--gold-text); border:1px solid rgba(209,157,64,0.45); padding:4px 10px; border-radius:20px; line-height:1.4; white-space:nowrap;}
.pill-cloud{display:flex; flex-wrap:wrap; gap:8px;}
.pill{font-size:13px; padding:6px 13px; border:1px solid var(--line); border-radius:20px; color:var(--navy); background:var(--paper-2); text-decoration:none; display:inline-block; line-height:1.4;}
a.pill:hover{border-color:var(--gold);}
.id{font-family:'IBM Plex Mono',monospace; font-size:12px; letter-spacing:.04em; color:var(--slate);}
.status{font-family:'IBM Plex Mono',monospace; font-size:11px; letter-spacing:.06em; text-transform:uppercase; color:var(--slate); white-space:nowrap;}
.status.s-released, .status.s-production{color:var(--navy);}
.status.s-draft, .status.s-prototype, .status.s-construction{color:var(--gold-text);}
.access{display:inline-flex; align-items:center; gap:6px; font-family:'IBM Plex Mono',monospace; font-size:11px; letter-spacing:.06em; text-transform:uppercase; color:var(--slate); white-space:nowrap;}
.access::before{content:""; width:7px; height:7px; border-radius:50%; border:1.5px solid currentColor;}
.access.a-open{color:#2F6B4F;} .access.a-open::before{background:currentColor;}
.access.a-registered{color:var(--gold-text);}
.access.a-licensed{color:var(--navy);} .access.a-licensed::before{background:var(--navy); border-color:var(--navy); border-radius:1px;}

/* ---------- Header / navigation ---------- */
.site-header{position:fixed; top:0; left:0; right:0; z-index:200; background:rgba(244,241,233,0.95); backdrop-filter:blur(10px); -webkit-backdrop-filter:blur(10px); box-shadow:0 1px 0 var(--line);}
.site-header nav{display:flex; align-items:center; justify-content:space-between; gap:24px; height:var(--header-h);}
.logo-link{display:block; flex-shrink:0; text-decoration:none;}
.logo-mark{height:24px; display:block;}
.nav-links{display:flex; gap:26px; list-style:none; margin:0; padding:0;}
.nav-links a{font-size:13.5px; font-weight:500; text-decoration:none; color:var(--navy); position:relative; padding-bottom:3px; white-space:nowrap;}
.nav-links a::after{content:""; position:absolute; left:0; bottom:0; width:0; height:1px; background:var(--gold); transition:width .25s ease;}
.nav-links a:hover::after, .nav-links a[aria-current="page"]::after{width:100%;}
.nav-right{display:flex; align-items:center; gap:12px;}
.nav-cta{font-size:13px; font-weight:600; font-family:'IBM Plex Mono',monospace; letter-spacing:.03em; border:1px solid var(--navy); border-radius:2px; padding:9px 16px; text-decoration:none; white-space:nowrap; color:var(--navy); transition:background .2s ease, color .2s ease;}
.nav-cta:hover{background:var(--navy); color:var(--paper);}
.nav-burger{display:none; width:40px; height:40px; border:1px solid var(--line); background:transparent; border-radius:2px; cursor:pointer; align-items:center; justify-content:center; padding:0; color:var(--navy);}
.nav-burger-lines, .nav-burger-lines::before, .nav-burger-lines::after{display:block; width:18px; height:1.5px; background:currentColor; position:relative; transition:transform .2s ease, background .2s ease;}
.nav-burger-lines::before, .nav-burger-lines::after{content:""; position:absolute; left:0;}
.nav-burger-lines::before{top:-6px;} .nav-burger-lines::after{top:6px;}
.site-header.open .nav-burger-lines{background:transparent;}
.site-header.open .nav-burger-lines::before{transform:translateY(6px) rotate(45deg);}
.site-header.open .nav-burger-lines::after{transform:translateY(-6px) rotate(-45deg);}

/* ---------- Buttons ---------- */
.btn{font-size:14.5px; font-weight:600; text-decoration:none; padding:14px 24px; border-radius:2px; display:inline-block; font-family:'Inter',sans-serif; border:1px solid transparent; cursor:pointer; line-height:1.3; transition:transform .2s ease, background .2s ease, color .2s ease, border-color .2s ease;}
.btn-primary{background:var(--navy); color:var(--paper);}
.btn-primary:hover{background:var(--navy-2); transform:translateY(-1px);}
.btn-ghost{border-color:var(--line-strong); color:var(--navy); background:transparent;}
.btn-ghost:hover{border-color:var(--navy);}
.btn-gold{background:var(--gold); color:var(--ink);}
.btn-gold:hover{background:var(--gold-light);}
.on-dark .btn-ghost{border-color:rgba(244,241,233,0.35); color:var(--paper);}
.on-dark .btn-ghost:hover{border-color:var(--gold-light);}
.btn-row{display:flex; gap:16px; flex-wrap:wrap; align-items:center;}
.text-link{font-family:'IBM Plex Mono',monospace; font-size:12.5px; letter-spacing:.03em; color:var(--navy); text-decoration:none; border-bottom:1px solid var(--gold); padding-bottom:2px;}
.text-link:hover{color:var(--gold-text);}

/* ---------- Page hero ---------- */
main{display:block;}
.page-hero{padding:calc(var(--header-h) + 104px) 0 80px; border-bottom:1px solid var(--line);}
.page-hero .wrap > *{max-width:820px;}
.page-hero h1{font-size:clamp(32px,4.4vw,52px); line-height:1.1; margin:18px 0 22px;}
.page-hero .lead{font-size:18px; color:var(--slate); max-width:62ch; margin:0 0 32px;}
.hero-note{margin-top:26px; font-size:13px; color:var(--slate); font-family:'IBM Plex Mono',monospace; letter-spacing:.02em;}
.hero-note strong{color:var(--navy); font-weight:500;}

/* ---------- Sections ---------- */
.section{padding:96px 0;}
.section.alt{background:var(--paper-2);}
.section.tight{padding:72px 0;}
.section-head{max-width:680px; margin-bottom:48px;}
.section-head h2{font-size:clamp(27px,3.2vw,38px); line-height:1.15; margin:16px 0 16px;}
.section-head p{color:var(--slate); font-size:16.5px; max-width:60ch; margin:0;}
.section-head-row{display:flex; justify-content:space-between; align-items:flex-end; gap:24px; flex-wrap:wrap; margin-bottom:44px;}
.section-head-row .section-head{margin-bottom:0;}
.muted{color:var(--slate);}
.small{font-size:13.5px;}
.note{font-size:13px; color:var(--slate); font-style:italic; margin-top:20px;}

/* ---------- Hairline card grids ---------- */
.seam{display:grid; gap:1px; background:var(--line); border:1px solid var(--line); border-radius:4px; overflow:hidden;}
.cols-2{grid-template-columns:repeat(2,1fr);} .cols-3{grid-template-columns:repeat(3,1fr);}
.cols-4{grid-template-columns:repeat(4,1fr);} .cols-5{grid-template-columns:repeat(5,1fr);}
.card{background:var(--paper); padding:30px 28px; display:flex; flex-direction:column; gap:12px; transition:background .25s ease; color:var(--navy);}
.alt .card{background:var(--paper);}
a.card{text-decoration:none;}
a.card:hover, .card.hover:hover{background:var(--white);}
.card h3{font-size:19px; line-height:1.25;}
.card p{font-size:14.5px; color:var(--slate); margin:0;}
.card .step-no{font-family:'IBM Plex Mono',monospace; font-size:11px; color:var(--gold-text); letter-spacing:.12em;}
.card .go{margin-top:auto; padding-top:6px; font-family:'IBM Plex Mono',monospace; font-size:11.5px; color:var(--navy);}
.card .go span{border-bottom:1px solid var(--gold); padding-bottom:2px;}

/* boxed cards with gap */
.box-grid{display:grid; gap:14px;}
.box{border:1px solid var(--line); border-radius:4px; padding:26px 24px; background:var(--paper-2); text-decoration:none; color:var(--navy); display:block; transition:border-color .2s ease, transform .2s ease;}
a.box:hover{border-color:var(--gold); transform:translateY(-2px);}
.box h3{font-size:17px; margin-bottom:8px;}
.box p{font-size:13.5px; color:var(--slate); margin:0;}

/* ---------- Sequence rail ---------- */
.rail{display:grid; grid-template-columns:repeat(var(--steps,6),1fr); position:relative;}
.rail::before{content:""; position:absolute; top:15px; left:2%; right:6%; height:1px; background:var(--line-strong);}
.rail .step{position:relative; padding-right:16px;}
.rail .num{width:31px; height:31px; border-radius:50%; background:var(--paper); border:1.5px solid var(--navy); display:flex; align-items:center; justify-content:center; font-family:'IBM Plex Mono',monospace; font-size:12px; font-weight:500; position:relative; z-index:1; margin-bottom:18px;}
.alt .rail .num{background:var(--paper-2);}
.rail .step:last-child .num{background:var(--navy); color:var(--gold-light);}
.rail h4{font-size:17px; margin:0 0 6px;}
.rail p{font-size:13.5px; color:var(--slate); margin:0;}

/* ---------- Row lists ---------- */
.row-list{border-top:1px solid var(--line);}
.row{display:grid; grid-template-columns:2fr 3fr; gap:30px; padding:24px 0; border-bottom:1px solid var(--line); align-items:baseline;}
.row h3{font-size:18px;}
.row p{font-size:14.5px; color:var(--slate); margin:0;}

/* ---------- Two-engine split ---------- */
.worlds{display:grid; grid-template-columns:1fr 1fr; border:1px solid var(--line); border-radius:4px; overflow:hidden; position:relative;}
.world{padding:48px 44px;}
.world.dark{background:var(--navy); color:var(--paper);}
.world.dark h3{color:var(--paper);}
.world.light{background:var(--paper-2);}
.world h3{font-size:22px; margin-bottom:6px;}
.world .tag-row{display:flex; flex-wrap:wrap; gap:8px; margin:20px 0 22px;}
.world .tag-row span{font-family:'IBM Plex Mono',monospace; font-size:11.5px; letter-spacing:.05em; padding:5px 10px; border-radius:20px; text-transform:uppercase;}
.world.dark .tag-row span{background:rgba(234,197,124,0.14); color:var(--gold-light); border:1px solid rgba(234,197,124,0.3);}
.world.light .tag-row span{background:rgba(3,39,78,0.06); color:var(--navy); border:1px solid var(--line);}
.world p{font-size:15px; opacity:.88; max-width:46ch; margin:0;}
.world ul{margin:0; padding-left:18px; font-size:14.5px;}
.world li{margin-bottom:8px;}
.worlds-divider{position:absolute; left:50%; top:0; bottom:0; width:1px; background:var(--gold); transform:translateX(-50%); z-index:2;}
.worlds-divider::before,.worlds-divider::after{content:""; position:absolute; left:50%; width:10px; height:10px; border-radius:50%; background:var(--gold); transform:translateX(-50%);}
.worlds-divider::before{top:-5px;} .worlds-divider::after{bottom:-5px;}
.worlds-message{text-align:center; font-family:'Fraunces',serif; font-size:20px; font-weight:500; margin-top:32px;}

/* ---------- Detail columns (capabilities / industries) ---------- */
.detail-head{max-width:760px; margin-bottom:40px;}
.detail-head h2{font-size:clamp(26px,3vw,36px); margin:14px 0 12px;}
.detail-head p{color:var(--slate); font-size:16px; max-width:64ch; margin:0;}
.detail-grid{display:grid; grid-template-columns:1fr 1.15fr 1fr; gap:44px;}
.col h4{font-family:'IBM Plex Mono',monospace; font-size:11.5px; font-weight:500; letter-spacing:.1em; text-transform:uppercase; color:var(--slate); margin:0 0 14px;}
.col h4:not(:first-child){margin-top:30px;}
.dash-list{list-style:none; margin:0; padding:0; display:flex; flex-direction:column; gap:9px;}
.dash-list li{font-size:14px; color:var(--slate); padding-left:16px; position:relative;}
.dash-list li::before{content:"—"; color:var(--gold); position:absolute; left:0;}
.link-list{list-style:none; margin:0; padding:0; display:flex; flex-direction:column; gap:10px;}
.link-list a{font-size:14px; text-decoration:none; color:var(--navy); border-bottom:1px solid var(--gold); padding-bottom:1px;}
.link-list a:hover{color:var(--gold-text);}
.link-list .id{display:block; font-size:11px; margin-bottom:2px;}
.detail-cta{margin-top:36px; padding-top:22px; border-top:1px solid var(--line); display:flex; justify-content:space-between; gap:16px; flex-wrap:wrap; align-items:center;}
.detail-cta p{margin:0; font-size:14px; color:var(--slate);}

/* ---------- Dot lists ---------- */
.dot-grid{display:grid; grid-template-columns:1fr 1fr; gap:28px 44px;}
.dot-item{display:flex; gap:16px;}
.dot-item .mark{width:8px; height:8px; border-radius:50%; background:var(--gold); margin-top:9px; flex-shrink:0;}
.dot-item h4{font-size:16.5px; margin:0 0 6px;}
.dot-item p{font-size:14.5px; color:var(--slate); margin:0;}

/* ---------- Do / Don't ---------- */
.dd-grid{display:grid; grid-template-columns:1fr 1fr; gap:20px;}
.dd-card{border-radius:4px; padding:26px 28px; font-size:14.5px;}
.dd-card.gold{background:rgba(209,157,64,0.08); border:1px solid rgba(209,157,64,0.35);}
.dd-card.plain{background:rgba(3,39,78,0.035); border:1px solid var(--line);}
.dd-card h4{font-family:'IBM Plex Mono',monospace; font-size:11.5px; font-weight:500; letter-spacing:.1em; text-transform:uppercase; margin-bottom:14px;}
.dd-card.gold h4{color:var(--gold-text);} .dd-card.plain h4{color:var(--slate);}
.dd-card ul{margin:0; padding-left:18px;} .dd-card li{margin-bottom:9px; line-height:1.5;}

/* ---------- Tables ---------- */
.table-wrap{border:1px solid var(--line); border-radius:4px; overflow-x:auto; background:var(--paper);}
table.spec{width:100%; border-collapse:collapse; font-size:14px;}
table.spec th, table.spec td{text-align:left; padding:15px 18px; border-bottom:1px solid var(--line); vertical-align:top;}
table.spec th{font-family:'IBM Plex Mono',monospace; font-size:11px; letter-spacing:.08em; text-transform:uppercase; color:var(--slate); font-weight:500; background:var(--paper-2);}
table.spec tr:last-child td{border-bottom:none;}
table.spec td.name{font-family:'Fraunces',serif; font-weight:600; font-size:16px; white-space:nowrap;}
table.spec td.amt{font-family:'IBM Plex Mono',monospace; font-size:13px; color:var(--gold-text); white-space:nowrap;}
table.spec td.track{font-family:'IBM Plex Mono',monospace; font-size:11px; letter-spacing:.06em; text-transform:uppercase; color:var(--slate); white-space:nowrap;}
table.spec a{color:var(--navy); text-decoration:none; border-bottom:1px solid var(--gold);}

/* ---------- Timeline ---------- */
.timeline{border-left:1px solid var(--line-strong); margin-left:6px;}
.t-row{position:relative; padding:0 0 30px 30px; display:grid; grid-template-columns:150px 1fr; gap:20px;}
.t-row:last-child{padding-bottom:0;}
.t-row::before{content:""; position:absolute; left:-6px; top:6px; width:11px; height:11px; border-radius:50%; background:var(--paper); border:1.5px solid var(--navy);}
.t-row.now::before{background:var(--gold); border-color:var(--gold);}
.t-row.next::before{border-style:dashed;}
.t-when{font-family:'IBM Plex Mono',monospace; font-size:12px; letter-spacing:.06em; text-transform:uppercase; color:var(--gold-text); padding-top:2px;}
.t-row h4{font-size:17px; margin:0 0 4px;}
.t-row p{font-size:14.5px; color:var(--slate); margin:0;}

/* ---------- FAQ ---------- */
.faq{border-top:1px solid var(--line);}
.faq details{border-bottom:1px solid var(--line);}
.faq summary{list-style:none; cursor:pointer; padding:22px 40px 22px 0; font-family:'Fraunces',serif; font-weight:600; font-size:17.5px; position:relative;}
.faq summary::-webkit-details-marker{display:none;}
.faq summary::after{content:"+"; position:absolute; right:4px; top:18px; font-family:'IBM Plex Mono',monospace; font-size:20px; color:var(--gold-text); transition:transform .2s ease;}
.faq details[open] summary::after{transform:rotate(45deg);}
.faq .answer{padding:0 0 24px; color:var(--slate); font-size:15px; max-width:72ch;}
.faq .answer p:last-child{margin:0;}

/* ---------- Closing statement ---------- */
.closing{background:var(--ink); color:var(--paper); text-align:center; padding:96px 0;}
.closing.navy{background:var(--navy);}
.closing .wrap{max-width:820px;}
.closing .statement{font-family:'Fraunces',serif; font-size:clamp(22px,3.2vw,34px); line-height:1.35; font-weight:500; margin:0 0 36px;}
.closing .btn-row{justify-content:center;}
.closing .eyebrow{justify-content:center; margin-bottom:18px;}

/* ---------- Footer ---------- */
.site-footer{background:var(--navy); color:var(--paper); padding:70px 0 36px;}
.footer-top{display:flex; justify-content:space-between; align-items:center; gap:24px; flex-wrap:wrap; padding-bottom:44px; margin-bottom:44px; border-bottom:1px solid var(--line-light);}
.site-footer .logo-mark{filter:invert(1) brightness(1.6); height:22px;}
.footer-cols{display:grid; grid-template-columns:repeat(4,1fr); gap:32px;}
.footer-cols h2{font-family:'IBM Plex Mono',monospace; font-size:11px; font-weight:500; letter-spacing:.1em; text-transform:uppercase; color:rgba(244,241,233,0.55); margin:0 0 14px;}
.footer-cols ul{list-style:none; margin:0; padding:0; display:flex; flex-direction:column; gap:9px;}
.footer-cols a, .footer-cols li{text-decoration:none; font-size:13.5px; color:var(--paper);}
.footer-cols a{opacity:.85;}
.footer-cols li.plain{opacity:.65;}
.footer-cols a:hover{opacity:1; color:var(--gold-light);}
.footer-bottom{display:flex; justify-content:space-between; flex-wrap:wrap; gap:12px; font-size:12.5px; color:rgba(244,241,233,0.55); font-family:'IBM Plex Mono',monospace; margin-top:44px;}
.footer-bottom a{color:rgba(244,241,233,0.8); text-decoration:none; border-bottom:1px solid rgba(234,197,124,0.5);}
.footer-bottom a:hover{color:var(--gold-light);}

/* ---------- Reveal (only when JS is running) ---------- */
.js .reveal{opacity:0; transform:translateY(18px); transition:opacity .7s ease, transform .7s ease;}
.js .reveal.in{opacity:1; transform:none;}

/* =========================================================
   FORMS
   ========================================================= */
.form-layout{display:grid; grid-template-columns:minmax(0,1fr) 320px; gap:56px; align-items:start;}
.form-aside{position:sticky; top:calc(var(--header-h) + 28px); border:1px solid var(--line); border-radius:4px; background:var(--paper-2); padding:28px 26px;}
.form-aside h2{font-size:19px; margin:12px 0 16px;}
.form-aside ol{list-style:none; margin:0 0 20px; padding:0; counter-reset:s;}
.form-aside ol li{counter-increment:s; position:relative; padding:0 0 14px 34px; font-size:14px; color:var(--slate);}
.form-aside ol li::before{content:counter(s,decimal-leading-zero); position:absolute; left:0; top:1px; font-family:'IBM Plex Mono',monospace; font-size:11px; color:var(--gold-text);}
.form-aside ol li strong{display:block; color:var(--navy); font-weight:600; font-size:14px;}
.form-aside .aside-foot{font-size:13px; color:var(--slate); border-top:1px solid var(--line); padding-top:16px; margin:0;}
.form-aside .aside-foot a{color:var(--navy);}

form.a-form{margin:0;}
.fieldset{border:0; padding:0; margin:0 0 44px; min-width:0;}
.fieldset-head{display:flex; align-items:baseline; gap:14px; padding-bottom:14px; margin-bottom:24px; border-bottom:1px solid var(--line); width:100%;}
.fieldset-head .n{font-family:'IBM Plex Mono',monospace; font-size:12px; color:var(--gold-text); letter-spacing:.08em;}
.fieldset-head h2{font-size:22px;}
.fieldset-intro{font-size:14.5px; color:var(--slate); margin:-10px 0 22px; max-width:62ch;}
.field-grid{display:grid; grid-template-columns:1fr 1fr; gap:22px 24px;}
.field{display:flex; flex-direction:column; gap:8px; min-width:0;}
.field.full{grid-column:1 / -1;}
.field label, .label{font-family:'IBM Plex Mono',monospace; font-size:11.5px; font-weight:500; letter-spacing:.08em; text-transform:uppercase; color:var(--navy);}
.field .opt{color:var(--slate); text-transform:none; letter-spacing:0; font-weight:400;}
.field .hint{font-size:12.5px; color:var(--slate); margin:-2px 0 0;}
.input, .select, .textarea{font:inherit; font-size:15px; color:var(--navy); background:var(--white); border:1px solid var(--line-strong); border-radius:2px; padding:12px 14px; width:100%; transition:border-color .2s ease, box-shadow .2s ease;}
.textarea{min-height:140px; resize:vertical; line-height:1.55;}
.select{appearance:none; -webkit-appearance:none; background-image:linear-gradient(45deg,transparent 50%,var(--navy) 50%),linear-gradient(135deg,var(--navy) 50%,transparent 50%); background-position:calc(100% - 18px) 52%, calc(100% - 13px) 52%; background-size:5px 5px; background-repeat:no-repeat; padding-right:38px;}
.input:focus, .select:focus, .textarea:focus{outline:none; border-color:var(--navy); box-shadow:0 0 0 3px rgba(209,157,64,0.35);}
.was-validated .input:invalid, .was-validated .select:invalid, .was-validated .textarea:invalid{border-color:var(--error);}
.field-error{font-size:12.5px; color:var(--error); display:none;}
.was-validated .field-error.show, .field-error.show{display:block;}

/* choice cards (radio) */
.choices{display:grid; grid-template-columns:repeat(2,1fr); gap:12px;}
.choices.three{grid-template-columns:repeat(3,1fr);}
.choice{position:relative; display:block; cursor:pointer;}
.choice input{position:absolute; opacity:0; inset:0; width:100%; height:100%; margin:0; cursor:pointer;}
.choice .c-body{display:block; height:100%; border:1px solid var(--line-strong); border-radius:4px; background:var(--white); padding:18px 18px 18px 46px; position:relative; transition:border-color .2s ease, background .2s ease;}
.choice .c-body::before{content:""; position:absolute; left:18px; top:21px; width:14px; height:14px; border-radius:50%; border:1.5px solid var(--navy); background:var(--white);}
.choice .c-title{display:block; font-family:'Fraunces',serif; font-weight:600; font-size:16px; color:var(--navy); line-height:1.3;}
.choice .c-desc{display:block; font-size:13px; color:var(--slate); margin-top:4px; line-height:1.45;}
.choice .c-meta{display:block; font-family:'IBM Plex Mono',monospace; font-size:11px; color:var(--gold-text); letter-spacing:.04em; margin-top:8px;}
.choice:hover .c-body{border-color:var(--navy);}
.choice input:checked + .c-body{border-color:var(--gold); background:rgba(209,157,64,0.08); box-shadow:inset 0 0 0 1px var(--gold);}
.choice input:checked + .c-body::before{border-color:var(--gold); background:var(--gold); box-shadow:inset 0 0 0 3px var(--white);}
.choice input:focus-visible + .c-body{outline:2px solid var(--gold); outline-offset:2px;}

/* checkbox tags */
.checks{display:flex; flex-wrap:wrap; gap:10px;}
.check{position:relative; cursor:pointer;}
.check input{position:absolute; opacity:0; inset:0; margin:0; cursor:pointer;}
.check span{display:inline-block; font-size:13.5px; padding:8px 15px; border:1px solid var(--line-strong); border-radius:20px; background:var(--white); color:var(--navy); transition:all .2s ease;}
.check:hover span{border-color:var(--navy);}
.check input:checked + span{background:var(--navy); color:var(--paper); border-color:var(--navy);}
.check input:focus-visible + span{outline:2px solid var(--gold); outline-offset:2px;}

/* single consent checkbox */
.consent{display:flex; gap:12px; align-items:flex-start; font-size:14px; color:var(--slate); cursor:pointer;}
.consent input{width:18px; height:18px; margin:2px 0 0; accent-color:var(--navy); flex-shrink:0;}
.consent a{color:var(--navy);}
.notice{border-left:2px solid var(--gold); background:rgba(209,157,64,0.08); padding:14px 18px; font-size:14px; color:var(--navy); margin:0 0 22px; border-radius:0 2px 2px 0;}
.hp{position:absolute !important; left:-9999px !important; width:1px; height:1px; overflow:hidden;}
.form-actions{display:flex; gap:18px; align-items:center; flex-wrap:wrap; margin-top:10px;}
.form-actions .small{margin:0;}
.btn[disabled]{opacity:.6; cursor:wait; transform:none;}
.form-status{margin-top:18px; font-size:14px; padding:14px 18px; border-radius:2px; display:none;}
.form-status.error{display:block; background:rgba(155,44,44,0.07); border:1px solid rgba(155,44,44,0.3); color:var(--error);}
.form-status.error a{color:var(--error);}
.form-success{display:none; border:1px solid var(--line); border-radius:4px; background:var(--paper-2); padding:44px 40px;}
.form-success.show{display:block;}
.form-success .tick{width:44px; height:44px; border-radius:50%; background:var(--navy); color:var(--gold-light); display:flex; align-items:center; justify-content:center; font-size:20px; margin-bottom:22px;}
.form-success h2{font-size:28px; margin-bottom:12px;}
.form-success p{color:var(--slate); max-width:56ch;}
[data-show-when][hidden]{display:none !important;}

/* =========================================================
   RESEARCH
   ========================================================= */
.subnav{position:sticky; top:var(--header-h); z-index:150; background:var(--ink); color:var(--paper);}
.subnav .wrap{display:flex; align-items:center; gap:28px; height:48px; overflow-x:auto; scrollbar-width:none;}
.subnav .wrap::-webkit-scrollbar{display:none;}
.subnav .brand{font-family:'IBM Plex Mono',monospace; font-size:11.5px; letter-spacing:.14em; text-transform:uppercase; color:var(--gold-light); white-space:nowrap; text-decoration:none; padding-right:24px; border-right:1px solid var(--line-light);}
.subnav ul{display:flex; gap:24px; list-style:none; margin:0; padding:0;}
.subnav ul a{font-size:13px; color:rgba(244,241,233,0.78); text-decoration:none; white-space:nowrap; padding:14px 0; border-bottom:1px solid transparent;}
.subnav ul a:hover{color:var(--paper);}
.subnav ul a[aria-current="page"]{color:var(--paper); border-bottom-color:var(--gold);}
.research-page .page-hero{padding-top:calc(var(--header-h) + 48px + 72px); padding-bottom:64px;}
.crumbs{font-family:'IBM Plex Mono',monospace; font-size:11.5px; letter-spacing:.04em; color:var(--slate); margin-bottom:18px; display:flex; gap:8px; flex-wrap:wrap;}
.crumbs a{color:var(--slate); text-decoration:none; border-bottom:1px solid var(--line-strong);}
.crumbs a:hover{color:var(--navy);}

.stats{display:grid; grid-template-columns:repeat(5,1fr); border-top:1px solid var(--line); border-bottom:1px solid var(--line);}
.stat{padding:22px 20px; border-right:1px solid var(--line); text-decoration:none; color:var(--navy);}
.stat:last-child{border-right:0;}
a.stat:hover{background:var(--paper-2);}
.stat .n{font-family:'Fraunces',serif; font-size:34px; font-weight:600; line-height:1;}
.stat .l{font-family:'IBM Plex Mono',monospace; font-size:11px; letter-spacing:.1em; text-transform:uppercase; color:var(--slate); margin-top:8px;}

/* publication list */
.pub-list{border-top:1px solid var(--line);}
.pub{display:grid; grid-template-columns:170px minmax(0,1fr) 150px 120px; gap:22px; align-items:baseline; padding:20px 6px; border-bottom:1px solid var(--line); text-decoration:none; color:var(--navy); transition:background .2s ease;}
a.pub:hover{background:var(--paper-2);}
.pub .p-type{display:flex; flex-direction:column; gap:6px;}
.pub h3{font-size:16.5px; line-height:1.35;}
.pub .p-sub{display:block; font-size:12.5px; color:var(--slate); margin-top:4px; font-family:'Inter',sans-serif; font-weight:400;}
.pub .p-date{font-family:'IBM Plex Mono',monospace; font-size:12px; color:var(--slate);}
.pub .p-status{text-align:right;}
.pub[hidden]{display:none;}
.empty-state{padding:40px 6px; color:var(--slate); font-size:15px; display:none;}
.empty-state.show{display:block;}

.lead-feature{display:grid; grid-template-columns:1.25fr 1fr; border:1px solid var(--line); border-radius:4px; overflow:hidden;}
.lead-feature .lf-main{background:var(--navy); color:var(--paper); padding:40px 40px 36px; display:flex; flex-direction:column; gap:14px;}
.lead-feature .lf-main h3{color:var(--paper); font-size:clamp(22px,2.4vw,28px); line-height:1.25;}
.lead-feature .lf-main p{color:rgba(244,241,233,0.85); font-size:15px; margin:0;}
.lead-feature .lf-main .id{color:var(--gold-light);}
.lead-feature .lf-main .tag{color:var(--gold-light); border-color:rgba(234,197,124,0.45);}
.lead-feature .lf-main .text-link{color:var(--paper); border-color:var(--gold-light); align-self:flex-start; margin-top:auto;}
.lead-feature .lf-side{background:var(--paper); padding:10px 30px;}
.mini{display:block; padding:18px 0; border-bottom:1px solid var(--line); text-decoration:none; color:var(--navy);}
.mini:last-child{border-bottom:0;}
.mini .id{font-size:11px;}
.mini h4{font-size:15.5px; line-height:1.35; margin-top:4px;}
.mini:hover h4{color:var(--navy-2); text-decoration:underline; text-decoration-color:var(--gold); text-underline-offset:3px;}

/* model / dataset cards */
.lib-card{background:var(--paper); padding:26px 24px; display:flex; flex-direction:column; gap:10px; text-decoration:none; color:var(--navy); transition:background .2s ease;}
a.lib-card:hover{background:var(--white);}
.lib-card .lc-top{display:flex; justify-content:space-between; gap:10px; align-items:center;}
.lib-card .id{color:var(--gold-text); font-weight:500;}
.lib-card h3{font-size:18px; line-height:1.3;}
.lib-card p{font-size:14px; color:var(--slate); margin:0;}
.lib-card .lc-foot{margin-top:auto; padding-top:10px; display:flex; justify-content:space-between; gap:10px; align-items:center; border-top:1px solid var(--line);}

/* filters */
.filters{display:flex; flex-direction:column; gap:14px; margin-bottom:28px;}
.filter-row{display:flex; flex-wrap:wrap; gap:8px; align-items:center;}
.filter-row .label{margin-right:8px; color:var(--slate); min-width:86px;}
.chip{font-family:'IBM Plex Mono',monospace; font-size:11.5px; letter-spacing:.05em; text-transform:uppercase; padding:7px 13px; border-radius:20px; border:1px solid var(--line-strong); background:transparent; color:var(--slate); cursor:pointer; transition:all .2s ease;}
.chip:hover{border-color:var(--gold); color:var(--navy);}
.chip[aria-pressed="true"]{background:var(--navy); color:var(--paper); border-color:var(--navy);}
.search{position:relative; max-width:420px;}
.search .input{padding-left:40px;}
.search::before{content:""; position:absolute; left:15px; top:50%; width:11px; height:11px; border:1.5px solid var(--slate); border-radius:50%; transform:translateY(-62%);}
.search::after{content:""; position:absolute; left:25px; top:58%; width:6px; height:1.5px; background:var(--slate); transform:rotate(45deg);}
.result-count{font-family:'IBM Plex Mono',monospace; font-size:12px; color:var(--slate); margin:0 0 10px;}

/* document page */
.doc-layout{display:grid; grid-template-columns:minmax(0,1fr) 300px; gap:64px; align-items:start;}
.doc-body h2{font-size:22px; margin:40px 0 14px;}
.doc-body h2:first-child{margin-top:0;}
.doc-body p, .doc-body li{font-size:16px; color:#2A3B4C; line-height:1.7;}
.doc-body ul{padding-left:20px;}
.doc-body li{margin-bottom:8px;}
.abstract{font-family:'Fraunces',serif; font-size:19px; line-height:1.6; color:var(--navy); font-weight:400;}
.meta-panel{position:sticky; top:calc(var(--header-h) + 48px + 24px); border:1px solid var(--line); border-radius:4px; background:var(--paper-2); padding:24px 22px;}
.meta-panel dl{margin:0 0 18px;}
.meta-panel dt{font-family:'IBM Plex Mono',monospace; font-size:10.5px; letter-spacing:.1em; text-transform:uppercase; color:var(--slate); margin-top:14px;}
.meta-panel dt:first-child{margin-top:0;}
.meta-panel dd{margin:4px 0 0; font-size:14px; color:var(--navy);}
.meta-panel dd a{color:var(--navy);}
.meta-panel .btn{width:100%; text-align:center;}
.meta-panel .btn + .btn{margin-top:10px;}
.cite{background:var(--white); border:1px solid var(--line); border-radius:4px; padding:18px 20px; font-family:'IBM Plex Mono',monospace; font-size:13px; line-height:1.7; color:var(--navy); position:relative;}
.cite-actions{display:flex; gap:12px; margin-top:10px;}
.copy-btn{font-family:'IBM Plex Mono',monospace; font-size:11.5px; letter-spacing:.05em; text-transform:uppercase; border:1px solid var(--line-strong); background:transparent; padding:7px 12px; border-radius:2px; cursor:pointer; color:var(--navy);}
.copy-btn:hover{border-color:var(--navy);}
.related{display:grid; grid-template-columns:repeat(3,1fr); gap:1px; background:var(--line); border:1px solid var(--line); border-radius:4px; overflow:hidden;}
.spec-dl{display:grid; grid-template-columns:200px 1fr; border-top:1px solid var(--line); margin:0;}
.spec-dl dt, .spec-dl dd{padding:14px 0; border-bottom:1px solid var(--line); margin:0;}
.spec-dl dt{font-family:'IBM Plex Mono',monospace; font-size:11px; letter-spacing:.08em; text-transform:uppercase; color:var(--slate); padding-top:16px;}
.spec-dl dd{font-size:15px; color:var(--navy);}
.version-list{list-style:none; padding:0; margin:0; border-top:1px solid var(--line);}
.version-list li{display:grid; grid-template-columns:90px 120px 1fr; gap:16px; padding:12px 0; border-bottom:1px solid var(--line); font-size:14.5px; color:var(--slate);}
.version-list .v{font-family:'IBM Plex Mono',monospace; color:var(--navy); font-size:13px;}
.version-list .d{font-family:'IBM Plex Mono',monospace; font-size:12px;}
.pillar-grid{display:grid; grid-template-columns:repeat(5,1fr); gap:1px; background:var(--line); border:1px solid var(--line); border-radius:4px; overflow:hidden;}
.pillar{background:var(--paper); padding:24px 20px;}
.pillar .w{font-family:'IBM Plex Mono',monospace; font-size:11px; color:var(--gold-text); letter-spacing:.08em;}
.pillar h4{font-size:16px; margin:10px 0 8px;}
.pillar p{font-size:13px; color:var(--slate); margin:0;}
.project{display:grid; grid-template-columns:150px minmax(0,1fr) 130px; gap:22px; padding:20px 0; border-bottom:1px solid var(--line); align-items:baseline;}
.project h4{font-size:16.5px; margin-bottom:6px;}
.project p{font-size:14px; color:var(--slate); margin:0 0 8px;}
.project .outs{display:flex; flex-wrap:wrap; gap:8px 16px;}
.project .outs a{font-family:'IBM Plex Mono',monospace; font-size:11.5px; color:var(--navy); text-decoration:none; border-bottom:1px solid var(--gold);}
.prog-block{padding:72px 0; border-bottom:1px solid var(--line);}
.prog-block:last-of-type{border-bottom:0;}
.prog-head{display:grid; grid-template-columns:1fr 1fr; gap:48px; margin-bottom:28px;}
.prog-head h2{font-size:clamp(24px,2.8vw,32px); margin:12px 0 0;}
.prog-head p{color:var(--slate); margin:0 0 14px;}

/* =========================================================
   RESPONSIVE
   ========================================================= */
@media (max-width:1100px){
  .nav-links{gap:20px;}
  .pub{grid-template-columns:150px minmax(0,1fr) 120px; }
  .pub .p-date{display:none;}
}
@media (max-width:980px){
  .nav-burger{display:inline-flex;}
  .nav-links{display:none; position:absolute; top:var(--header-h); left:0; right:0; flex-direction:column; gap:0; background:var(--paper); border-bottom:1px solid var(--line); box-shadow:0 12px 24px rgba(7,27,51,0.08); padding:8px 32px 20px;}
  .site-header.open .nav-links{display:flex;}
  .nav-links li{border-bottom:1px solid var(--line);}
  .nav-links a{display:block; padding:14px 0; font-size:15px;}
  .nav-links a::after{display:none;}
  .nav-links a[aria-current="page"]{color:var(--gold-text);}
  .section{padding:68px 0;}
  .closing{padding:72px 0;}
  .cols-3,.cols-4,.cols-5{grid-template-columns:1fr 1fr;}
  .worlds{grid-template-columns:1fr;} .worlds-divider{display:none;}
  .detail-grid{grid-template-columns:1fr; gap:30px;}
  .col h4:not(:first-child){margin-top:24px;}
  .row{grid-template-columns:1fr; gap:6px;}
  .dot-grid, .dd-grid{grid-template-columns:1fr;}
  .rail{grid-template-columns:1fr 1fr; row-gap:28px;}
  .rail::before{display:none;}
  .footer-cols{grid-template-columns:1fr 1fr;}
  .form-layout, .doc-layout{grid-template-columns:1fr; gap:36px;}
  .form-aside, .meta-panel{position:static;}
  .stats{grid-template-columns:repeat(3,1fr);}
  .stat:nth-child(3){border-right:0;}
  .stat:nth-child(n+4){border-top:1px solid var(--line);}
  .lead-feature{grid-template-columns:1fr;}
  .related{grid-template-columns:1fr;}
  .pillar-grid{grid-template-columns:1fr 1fr;}
  .prog-head{grid-template-columns:1fr; gap:12px;}
  .project{grid-template-columns:1fr; gap:6px;}
  .pub{grid-template-columns:1fr; gap:8px; padding:18px 4px;}
  .pub .p-type{flex-direction:row; align-items:center; gap:12px;}
  .pub .p-status{text-align:left;}
  .t-row{grid-template-columns:1fr; gap:4px;}
}
@media (max-width:640px){
  .wrap{padding:0 20px;}
  .nav-links{padding:8px 20px 20px;}
  .nav-cta{display:none;}
  .page-hero{padding:calc(var(--header-h) + 64px) 0 56px;}
  .research-page .page-hero{padding-top:calc(var(--header-h) + 48px + 48px);}
  .cols-2,.cols-3,.cols-4,.cols-5{grid-template-columns:1fr;}
  .box-grid{grid-template-columns:1fr !important;}
  .field-grid, .choices, .choices.three{grid-template-columns:1fr;}
  .rail{grid-template-columns:1fr;}
  .world{padding:36px 26px;}
  .card{padding:26px 22px;}
  .form-success{padding:32px 24px;}
  .stats{grid-template-columns:1fr 1fr;}
  .stat{border-right:1px solid var(--line) !important; border-top:1px solid var(--line);}
  .stat:nth-child(even){border-right:0 !important;}
  .stat:nth-child(-n+2){border-top:0;}
  .pillar-grid{grid-template-columns:1fr;}
  .spec-dl{grid-template-columns:1fr;}
  .spec-dl dt{border-bottom:0; padding-bottom:0;}
  .version-list li{grid-template-columns:70px 1fr;}
  .version-list li span:last-child{grid-column:1 / -1;}
  .lead-feature .lf-main{padding:30px 24px;}
  .lead-feature .lf-side{padding:6px 22px;}
  .footer-cols{grid-template-columns:1fr 1fr; gap:28px 20px;}
  .filter-row .label{min-width:100%;}
}

/* Mobile-only Partner link inside the menu (the header button hides on phones) */
.nav-links .nav-mobile-cta{display:none;}
@media (max-width:640px){
  .nav-links .nav-mobile-cta{display:block; border-bottom:0; padding-top:10px;}
  .nav-links .nav-mobile-cta a{font-family:'IBM Plex Mono',monospace; font-size:13.5px; font-weight:600; color:var(--navy); border:1px solid var(--navy); border-radius:2px; padding:12px 16px; text-align:center;}
  .ring-wrap{max-width:240px !important;}
}

/* Logo fallback: if the wordmark image can't load, show the name as text instead */
.logo-text{display:none; font-family:'Fraunces',serif; font-weight:600; font-size:21px; letter-spacing:.08em; text-transform:uppercase; color:var(--navy); line-height:1; white-space:nowrap;}
.logo-link.no-img .logo-mark{display:none;}
.logo-link.no-img .logo-text{display:block;}
.site-footer .logo-text{color:var(--paper); font-size:19px;}