/* envs.li — design tokens */
:root{
  --bg:#172f29;
  --bg-deep:#11241f;
  --bg-raise:#1c3931;
  --ink:#fffbee;
  --ink-2:rgba(255,251,238,.68);
  --ink-3:rgba(255,251,238,.42);
  --line:rgba(255,251,238,.14);
  --line-strong:rgba(255,251,238,.32);
  --signal:#a9e3bd;                 /* desaturated mint for the agent dot only */
  --sans:"Geist",ui-sans-serif,system-ui,-apple-system,"Segoe UI",sans-serif;
  --mono:"Geist Mono",ui-monospace,SFMono-Regular,Menlo,monospace;
  --max:1280px;
  --gutter:clamp(20px,4vw,56px);
  --ease:cubic-bezier(.16,1,.3,1);
}
*{box-sizing:border-box}
[hidden]{display:none !important}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}}
body{
  margin:0;background:var(--bg);color:var(--ink);
  font:300 17px/1.6 var(--sans);-webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
a{color:inherit;text-decoration:none}
::selection{background:var(--ink);color:var(--bg)}
.skip{position:absolute;left:-999px;top:8px;background:var(--ink);color:var(--bg);padding:8px 12px;z-index:100}
.skip:focus{left:8px}
.container{max-width:var(--max);margin:0 auto;padding-left:var(--gutter);padding-right:var(--gutter)}
.mono{font-family:var(--mono);font-weight:400;font-size:.82rem;letter-spacing:.02em}
.muted{color:var(--ink-2)}
.link{border-bottom:1px solid var(--line-strong);transition:border-color .25s var(--ease)}
.link:hover{border-color:var(--ink)}
.inline-code{font-size:.9em;background:rgba(255,251,238,.06);padding:.05em .35em;border:1px solid var(--line)}

/* type */
.eyebrow{
  font-family:var(--mono);font-size:.78rem;letter-spacing:.14em;text-transform:uppercase;
  color:var(--ink-2);margin:0 0 20px;
}
.display{
  font-family:var(--mono);font-weight:400;letter-spacing:-.02em;line-height:1.12;
  font-size:clamp(1.7rem,3.2vw,2.6rem);margin:0 0 20px;max-width:26ch;
}
.display em{font-style:normal;color:var(--signal)}
.display-sm{
  font-family:var(--mono);font-weight:400;letter-spacing:-.015em;line-height:1.15;
  font-size:clamp(1.5rem,2.4vw,2.05rem);margin:0 0 18px;max-width:30ch;
}
h3{font-family:var(--sans);font-weight:500;font-size:1.18rem;letter-spacing:-.01em;margin:0 0 8px}
p{margin:0 0 16px}
.lede{font-size:clamp(1.02rem,1.3vw,1.18rem);color:var(--ink-2);max-width:52ch;margin-bottom:28px}

/* buttons */
.btn{
  display:inline-flex;align-items:center;gap:10px;padding:13px 20px;border:1px solid var(--ink);
  font:400 .92rem/1 var(--sans);letter-spacing:.005em;border-radius:0;cursor:pointer;
  transition:transform .25s var(--ease),background-color .25s var(--ease),color .25s var(--ease),border-color .25s var(--ease);
  will-change:transform;
}
.btn:active{transform:translateY(1px) scale(.985)}
.btn-solid{background:var(--ink);color:var(--bg)}
.btn-solid:hover{background:#fff;border-color:#fff}
.btn-ghost{background:transparent;color:var(--ink);border-color:var(--line-strong)}
.btn-ghost:hover{border-color:var(--ink)}
.btn[disabled]{opacity:.55;cursor:default;transform:none}

/* nav */
.nav{
  position:sticky;top:0;z-index:20;display:flex;align-items:center;justify-content:space-between;
  padding:18px var(--gutter);
  background:rgba(23,47,41,.82);border-bottom:1px solid rgba(255,251,238,.07);
  backdrop-filter:blur(10px) saturate(1.1);-webkit-backdrop-filter:blur(10px) saturate(1.1);
}
.brand{display:inline-flex;align-items:center;gap:12px}
.brand-mark{color:var(--ink)}
.brand-word{font-family:var(--mono);font-size:1.15rem;letter-spacing:-.02em}
.brand-dot{color:var(--signal)}
.nav-links{display:flex;align-items:center;gap:30px}
.nav-links a:not(.btn){font-size:.95rem;color:var(--ink-2);transition:color .25s var(--ease)}
.nav-links a:not(.btn):hover{color:var(--ink)}
@media (max-width:760px){.nav-links a:not(.btn){display:none}.nav-links{gap:0}}

/* hero */
.hero{padding:clamp(56px,9vw,120px) 0 0}
.prose{max-width:760px;margin-inline:auto}
.hero .prose{text-align:center}
.hero .display,.hero .lede{margin-inline:auto}
.display,.display-sm{text-wrap:balance}
.section .prose>.label,.section .prose>.display-sm{text-align:center;margin-inline:auto}
.hero-actions{display:flex;justify-content:center;gap:12px;flex-wrap:wrap;margin-bottom:clamp(40px,6vw,72px)}
.frame{margin:0;position:relative;border:1px solid var(--line);background:var(--bg-deep);aspect-ratio:16/8;overflow:hidden}
@media (max-width:760px){.frame{aspect-ratio:4/3}}
.frame-canvas{position:absolute;inset:0;width:100%;height:100%;display:block}
.frame-caption{position:absolute;left:16px;bottom:12px;color:var(--ink-3);font-size:.74rem}
.frame-caption span{color:var(--ink-2)}
.label{font-family:var(--mono);font-size:.78rem;letter-spacing:.12em;text-transform:uppercase;color:var(--ink-3);margin:0 0 18px}
.punch{color:var(--ink);font-weight:400;font-size:1.12rem;margin:26px 0}
.section p:not(.label):not(.punch){color:var(--ink-2);max-width:66ch}
.sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}

/* sections */
.section{padding:clamp(64px,9vw,120px) 0 0}
.section-tight{padding-top:clamp(56px,8vw,96px);padding-bottom:clamp(56px,8vw,96px)}
.section-line{border-top:1px solid var(--line)}
.split{display:grid;grid-template-columns:5fr 7fr;gap:clamp(28px,6vw,96px);align-items:start}
.split-lead{position:relative}
.split-body p{max-width:58ch;color:var(--ink-2)}
@media (max-width:860px){.split{grid-template-columns:1fr;gap:20px}}

/* thesis list: 2 x 2 asymmetric, divided by lines, not cards */
.thesis{
  list-style:none;margin:clamp(48px,7vw,88px) 0 0;padding:0;
  display:grid;grid-template-columns:1fr 1fr;gap:0;border-top:1px solid var(--line);
}
.thesis li{padding:32px 40px 34px 0;border-bottom:1px solid var(--line)}
.thesis li:nth-child(2n){padding-left:40px;border-left:1px solid var(--line)}
.thesis li:nth-child(3),.thesis li:nth-child(4){padding-top:34px}
.thesis p{color:var(--ink-2);margin:0;max-width:40ch}
.num{display:block;color:var(--ink-3);margin-bottom:18px}
@media (max-width:860px){.thesis{grid-template-columns:1fr}.thesis li,.thesis li:nth-child(2n){padding:26px 0;border-left:0}}

/* sticky layout */
.sticky-layout{display:grid;grid-template-columns:4fr 8fr;gap:clamp(28px,6vw,96px);align-items:start}
.sticky-head{position:sticky;top:96px}
.offer-list{list-style:none;margin:0;padding:0;border-top:1px solid var(--line)}
.offer{padding:34px 0 36px;border-bottom:1px solid var(--line);display:grid;grid-template-columns:1fr;gap:6px;transition:padding-left .4s var(--ease)}
.offer:hover{padding-left:10px}
.offer-head{display:flex;align-items:baseline;gap:22px}
.offer-head .num{margin:0;min-width:2ch}
.offer-head h3{margin:0;font-size:1.3rem}
.offer p{color:var(--ink-2);max-width:60ch;margin:6px 0 14px 0}
.tags{display:flex;flex-wrap:wrap;gap:8px}
.tags span{border:1px solid var(--line);padding:4px 9px;color:var(--ink-2);font-size:.74rem}
@media (max-width:860px){.sticky-layout{grid-template-columns:1fr}.sticky-head{position:static}}

/* steps */
.steps{list-style:none;margin:8px 0 0;padding:0;display:grid;grid-template-columns:repeat(4,1fr);gap:0;border-top:1px solid var(--line)}
.steps li{padding:28px 28px 8px 0;border-right:1px solid var(--line);margin-right:28px}
.steps li:last-child{border-right:0;margin-right:0}
.steps p{color:var(--ink-2);font-size:.98rem;max-width:30ch}
@media (max-width:1000px){.steps{grid-template-columns:1fr 1fr}.steps li:nth-child(2n){border-right:0;margin-right:0}.steps li{border-bottom:1px solid var(--line);padding-bottom:24px}}
@media (max-width:600px){.steps{grid-template-columns:1fr}.steps li{border-right:0;margin-right:0}}

/* catalog */
.env-list{display:grid;gap:0;border-top:1px solid var(--line)}
.env{display:grid;grid-template-columns:1fr auto;gap:16px;padding:20px 0;border-bottom:1px solid var(--line);align-items:center;transition:padding-left .35s var(--ease)}
.env:hover{padding-left:8px}
.env strong{font-weight:500;display:block}
.env small{color:var(--ink-2);font-size:.92rem}
.env .mono{color:var(--ink-3)}
.skeleton{padding:20px 0;border-bottom:1px solid var(--line);display:grid;gap:10px}
.skeleton span{display:block;height:12px;width:55%;background:linear-gradient(90deg,rgba(255,251,238,.06),rgba(255,251,238,.14),rgba(255,251,238,.06));background-size:200% 100%;animation:shimmer 1.6s linear infinite}
.skeleton span:last-child{width:80%;height:10px}
@keyframes shimmer{to{background-position:-200% 0}}
.empty{padding:28px 0;border-bottom:1px solid var(--line);display:grid;grid-template-columns:auto 1fr;gap:18px;align-items:start}
.empty svg{color:var(--ink-3)}
.empty p{color:var(--ink-2);margin:0}
.empty .mono{color:var(--ink-3);display:block;margin-top:6px}

/* form */
.form{display:grid;gap:22px}
.field{display:grid;gap:8px;align-content:start}
label{font-size:.95rem;color:var(--ink)}
input,textarea{
  width:100%;background:rgba(255,251,238,.035);color:var(--ink);border:1px solid var(--line-strong);
  border-radius:0;padding:13px 14px;font:300 1rem/1.5 var(--sans);transition:border-color .25s var(--ease),background-color .25s var(--ease);
}
input::placeholder,textarea::placeholder{color:var(--ink-3)}
input:focus,textarea:focus{outline:none;border-color:var(--ink);background:rgba(255,251,238,.06)}
textarea{resize:vertical;min-height:130px}
.field.invalid input,.field.invalid textarea{border-color:#e6a3a3}
.field-error{color:#e6a3a3;font-size:.88rem;margin:0}
.field-help{color:var(--ink-3);font-size:.88rem;margin:0}
.form-actions{display:flex;align-items:center;gap:18px;flex-wrap:wrap}
.form-note{margin:0;color:var(--ink-2);font-size:.92rem;min-height:1.4em}
.form-note.ok{color:var(--signal)}
.form-note.err{color:#e6a3a3}

/* role selector */
.role{border:0;padding:0;margin:0;min-width:0}
.role legend{font-size:.95rem;color:var(--ink);padding:0;margin-bottom:8px}
.role-options{display:grid;grid-template-columns:1fr 1fr;gap:0;border:1px solid var(--line-strong)}
.role-option{position:relative;display:flex;align-items:center;justify-content:center;padding:12px 14px;cursor:pointer;color:var(--ink-2);text-align:center;font-size:.95rem;transition:background-color .25s var(--ease),color .25s var(--ease)}
.role-option+.role-option{border-left:1px solid var(--line-strong)}
.role-option input{position:absolute;opacity:0;inset:0;margin:0;cursor:pointer}
.role-option:has(input:checked){background:var(--ink);color:var(--bg)}
.role-option:has(input:focus-visible){outline:2px solid var(--signal);outline-offset:2px}
@media (max-width:480px){.role-options{grid-template-columns:1fr}.role-option+.role-option{border-left:0;border-top:1px solid var(--line-strong)}}
.hero-meta-right{margin-left:auto}

/* banner */
.banner{display:grid;grid-template-columns:5fr 7fr;gap:clamp(28px,5vw,72px);padding:clamp(28px,4vw,48px);border:1px solid var(--line);background:var(--bg-raise)}
.banner-copy h2{margin-bottom:12px}
.banner-form{gap:14px}
.banner-form textarea{min-height:88px}
@media (max-width:860px){.banner{grid-template-columns:1fr}}

/* footer */
.footer{border-top:1px solid var(--line);margin-top:0}
.footer-base{display:flex;justify-content:space-between;align-items:center;gap:16px;flex-wrap:wrap;padding-top:26px;padding-bottom:26px;color:var(--ink-3)}
.footer-mail{color:var(--ink-2);border-bottom:1px solid var(--line-strong)}
.footer-mail:hover{color:var(--ink);border-color:var(--ink)}

/* reveal */
.reveal{opacity:0;transform:translateY(14px);transition:opacity .8s var(--ease) var(--d,0ms),transform .8s var(--ease) var(--d,0ms)}
.reveal.in{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){.reveal{opacity:1;transform:none;transition:none}.skeleton span{animation:none}}

/* 404 */
.notfound{min-height:100dvh;display:grid;place-items:center;text-align:center}
.notfound .display{margin-inline:auto}

/* research */
.byline{color:var(--ink-3);margin:-8px 0 0}
.article{padding:clamp(56px,8vw,104px) 0 clamp(56px,8vw,96px)}
.article .display{max-width:22ch}
.article-body{margin-top:clamp(28px,4vw,48px)}
.article-body p{color:var(--ink-2);max-width:66ch;font-size:1.05rem;line-height:1.7}
.article-body h2{font-family:var(--mono);font-weight:400;letter-spacing:-.01em;line-height:1.25;font-size:clamp(1.25rem,1.9vw,1.6rem);margin:48px 0 14px;max-width:30ch}
.article-body h3{margin-top:32px}
.article-body blockquote{margin:28px 0;padding-left:18px;border-left:1px solid var(--line-strong);color:var(--ink)}
.article-body blockquote p{color:var(--ink);font-size:1.12rem}
.article-body a{border-bottom:1px solid var(--line-strong)}
.article-body a:hover{border-color:var(--ink)}
.article-body ul,.article-body ol{color:var(--ink-2);padding-left:1.2em;max-width:62ch}
.article-body li{margin-bottom:8px}
.article-body code{font-family:var(--mono);font-size:.9em;background:rgba(255,251,238,.06);padding:.05em .35em;border:1px solid var(--line)}
.article-foot{margin-top:clamp(40px,6vw,64px);padding-top:28px;border-top:1px solid var(--line)}
.research-index{padding:clamp(56px,8vw,104px) 0 clamp(56px,8vw,96px)}
.post-list{list-style:none;margin:clamp(28px,4vw,48px) 0 0;padding:0;border-top:1px solid var(--line)}
.post{border-bottom:1px solid var(--line)}
.post a{display:grid;gap:6px;padding:24px 0;transition:padding-left .35s var(--ease)}
.post a:hover{padding-left:10px}
.post-meta{color:var(--ink-3)}
.post-title{font-family:var(--mono);font-size:1.15rem;letter-spacing:-.01em}
.post-desc{color:var(--ink-2);max-width:60ch}
/* homepage research teaser */
.home-research .post-list{margin-top:22px}
.more{display:inline-block;margin-top:18px;color:var(--ink-2);border-bottom:1px solid var(--line-strong)}
.more:hover{color:var(--ink);border-color:var(--ink)}
/* article tables and code blocks */
.article-body table{border-collapse:collapse;width:100%;max-width:66ch;margin:22px 0;font-size:.95rem}
.article-body th,.article-body td{text-align:left;padding:10px 12px 10px 0;border-bottom:1px solid var(--line);vertical-align:top;color:var(--ink-2)}
.article-body th{font-family:var(--mono);font-weight:400;font-size:.78rem;letter-spacing:.08em;text-transform:uppercase;color:var(--ink-3)}
.article-body td:first-child,.article-body th:first-child{color:var(--ink)}
.article-body pre{background:var(--bg-deep);border:1px solid var(--line);padding:16px 18px;overflow:auto;margin:22px 0;max-width:100%}
.article-body pre code{background:none;border:0;padding:0;font-size:.86rem;line-height:1.55;color:var(--ink-2)}
.article-body .references{font-size:.95rem}

/* contribute: submission page */
.submit-section{padding:clamp(48px,7vw,96px) 0 clamp(56px,8vw,104px)}
.submit-section .display{max-width:20ch}
.callout{border:1px solid var(--line);background:var(--bg-raise);padding:clamp(20px,3vw,28px);margin:clamp(24px,4vw,36px) 0 0}
.callout p{color:var(--ink-2);margin:0 0 14px;max-width:70ch}
.callout p:last-child{margin-bottom:0}
.callout strong{color:var(--ink);font-weight:500}
.submit-form{margin-top:clamp(32px,5vw,52px);gap:22px}
.field-row{display:grid;grid-template-columns:1fr 1fr;gap:18px}
@media (max-width:640px){.field-row{grid-template-columns:1fr}}
.optional{color:var(--ink-3);font-size:.85em}
select{width:100%;background:rgba(255,251,238,.035);color:var(--ink);border:1px solid var(--line-strong);border-radius:0;padding:13px 14px;font:300 1rem/1.5 var(--sans);appearance:none;cursor:pointer;
  background-image:linear-gradient(45deg,transparent 50%,var(--ink-2) 50%),linear-gradient(135deg,var(--ink-2) 50%,transparent 50%);
  background-position:calc(100% - 18px) 21px,calc(100% - 13px) 21px;background-size:5px 5px,5px 5px;background-repeat:no-repeat}
select:focus{outline:none;border-color:var(--ink)}
select option{background:var(--bg-deep);color:var(--ink)}
.dropzone{position:relative;border:1px dashed var(--line-strong);padding:32px 20px;text-align:center;transition:border-color .25s var(--ease),background-color .25s var(--ease)}
.dropzone.over{border-color:var(--signal);background:rgba(169,227,189,.06)}
.dropzone input[type=file]{position:absolute;inset:0;width:100%;height:100%;opacity:0;cursor:pointer}
.dropzone-copy{margin:0 0 6px;color:var(--ink-2)}
.dropzone-hint{color:var(--ink-3);margin:0;font-size:.76rem}
.filelist{list-style:none;margin:12px 0 0;padding:0}
.filelist li{display:flex;align-items:center;gap:14px;padding:10px 0;border-bottom:1px solid var(--line);font-size:.92rem}
.filelist li span:first-child{flex:1;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.remove{background:none;border:0;color:var(--ink-3);font:inherit;font-size:.88rem;cursor:pointer;padding:2px 0;border-bottom:1px solid transparent}
.remove:hover{color:var(--ink);border-color:var(--line-strong)}
.check{display:grid;grid-template-columns:auto 1fr;gap:12px;align-items:start;cursor:pointer;color:var(--ink-2);font-size:.95rem;line-height:1.55}
.check input{appearance:none;width:18px;height:18px;margin:2px 0 0;border:1px solid var(--line-strong);background:rgba(255,251,238,.035);cursor:pointer;flex:none}
.check input:checked{background:var(--ink);border-color:var(--ink)}
.check input:checked::after{content:"";display:block;width:5px;height:9px;margin:2px auto;border:solid var(--bg);border-width:0 2px 2px 0;transform:rotate(45deg)}
.check input:focus-visible{outline:2px solid var(--signal);outline-offset:2px}
.consent.invalid .check input{border-color:#e6a3a3}
.hp{position:absolute;left:-9999px;width:1px;height:1px;overflow:hidden}
.progress{height:2px;background:var(--line);overflow:hidden}
.progress-bar{height:100%;width:0;background:var(--signal);transition:width .2s linear}
.done{border:1px solid var(--line);background:var(--bg-raise);padding:clamp(24px,4vw,40px);margin-top:clamp(24px,4vw,36px)}
.done p{color:var(--ink-2);max-width:60ch}
.done .mono{color:var(--signal)}