/* ===========================================================================
   thinkerslab.ai
   One stylesheet for the whole site. No build step: edit and deploy.

   Sections
     1. tokens
     2. base
     3. nav
     4. buttons
     5. sections and type
     6. cards
     7. dark sections
     8. home: hero, directions, exchange, join
     9. research: index
    10. research: post
    11. footer
    12. modal
    13. reveal
   =========================================================================== */

/* --- 1. tokens ----------------------------------------------------------- */
:root{
  /* --ink-faint is the lightest text on the site. #7c7a86 measured 3.83:1 on
     --paper, below the 4.5:1 AA threshold; #6d6b76 gives 4.76:1 there and
     5.15:1 on the #fffdf8 card. */
  --paper:#f6f4ee; --ink:#17161b; --ink-soft:#4a4854; --ink-faint:#6d6b76;
  --line:#dcd8cd; --accent:#4b40a6; --accent-soft:#6b61c9; --accent-on-dark:#9a93e2;
  --dark:#151420; --dark-soft:#a9a6bd;
  --radius:14px; --maxw:1080px; --readw:720px;
}

/* --- 2. base ------------------------------------------------------------- */
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0; background:var(--paper); color:var(--ink);
  font-family:'Inter',system-ui,-apple-system,sans-serif;
  font-size:17px; line-height:1.65; -webkit-font-smoothing:antialiased;
}
.serif{font-family:'Newsreader',Georgia,serif; font-weight:500; letter-spacing:-0.02em}
.wrap{max-width:var(--maxw); margin:0 auto; padding:0 28px}
.wrap-read{max-width:var(--readw); margin:0 auto; padding:0 28px}
a{color:var(--accent); text-decoration:none}
a:hover{text-decoration:underline}
img{max-width:100%; height:auto}

/* --- 3. nav -------------------------------------------------------------- */
.nav{
  position:sticky; top:0; z-index:40; background:rgba(246,244,238,.86);
  backdrop-filter:saturate(180%) blur(12px); border-bottom:1px solid var(--line);
}
.nav-in{display:flex; align-items:center; justify-content:space-between; height:66px}
.brand{display:flex; align-items:center; gap:11px; color:var(--ink)}
.brand:hover{text-decoration:none}
.brand svg{display:block; flex:none}
.brand-name{font-family:'Newsreader',Georgia,serif; font-size:21px; font-weight:500; letter-spacing:-.02em; white-space:nowrap}
.brand-name span{color:var(--accent)}
.nav-links{display:flex; gap:30px; align-items:center}
.nav-links a{color:var(--ink-soft); font-size:14.5px; font-weight:500}
.nav-links a:hover{color:var(--accent); text-decoration:none}
.nav-links a.here{color:var(--accent)}
.nav-cta{
  background:var(--accent); color:#fff !important; padding:9px 17px;
  border-radius:9px; font-size:14px;
}
.nav-cta:hover{background:var(--accent-soft); text-decoration:none}
/* Below 820px only the Research link and the call to action survive. Research
   stays because it is now a destination and there is no menu to find it in. */
@media(max-width:820px){
  .nav-links a:not(.nav-cta):not(.keep){display:none}
  .nav-links{gap:16px}
  .nav-cta{padding:8px 14px; font-size:13.5px}
}
@media(max-width:420px){
  .nav-links{gap:11px}
  .nav-links a:not(.nav-cta){font-size:13.5px}
  .brand-name{font-size:19px}
  .wrap,.wrap-read{padding:0 20px}
}

/* --- 4. buttons ---------------------------------------------------------- */
.btn{
  display:inline-block; padding:13px 24px; border-radius:10px;
  font-size:15px; font-weight:500; cursor:pointer; border:1px solid transparent;
  font-family:inherit;
}
.btn-primary{background:var(--accent); color:#fff}
.btn-primary:hover{background:var(--accent-soft); text-decoration:none}
.btn-ghost{border-color:var(--line); color:var(--ink); background:transparent}
.btn-ghost:hover{border-color:var(--accent); color:var(--accent); text-decoration:none}
.btn-row{display:flex; gap:13px; flex-wrap:wrap}

/* --- 5. sections and type ------------------------------------------------ */
section{padding:88px 0}
.eyebrow{
  font-size:12.5px; letter-spacing:.15em; text-transform:uppercase;
  color:var(--accent); font-weight:600; margin-bottom:26px;
}
.kicker{
  font-size:12.5px; letter-spacing:.15em; text-transform:uppercase;
  color:var(--ink-faint); font-weight:600; margin-bottom:20px;
}
.sec-title{font-size:clamp(28px,3.6vw,40px); line-height:1.18; margin:0 0 28px; max-width:22ch}
.lede{font-size:18px; color:var(--ink-soft); max-width:66ch}
.lede + .lede{margin-top:19px}
.lede strong{color:var(--ink); font-weight:500}
.bordered{border-bottom:1px solid var(--line)}

/* pull-quote style statement */
.statement{
  margin:44px 0 0; padding:26px 0 26px 28px; border-left:3px solid var(--accent);
  font-family:'Newsreader',Georgia,serif; font-size:21px; line-height:1.5;
  color:var(--ink); max-width:56ch;
}

/* --- 6. cards ------------------------------------------------------------ */
.cards{display:grid; grid-template-columns:repeat(auto-fit,minmax(260px,1fr)); gap:22px; margin-top:48px}
.card{
  background:#fffdf8; border:1px solid var(--line); border-radius:var(--radius);
  padding:26px 24px;
}
.card h3{margin:0 0 10px; font-size:17px; font-weight:600}
.card p{margin:0; font-size:15.5px; color:var(--ink-soft)}

/* --- 7. dark sections ---------------------------------------------------- */
.dark-sec{background:var(--dark); color:#fff}
.dark-sec .kicker{color:var(--dark-soft)}
.dark-sec .sec-title{color:#fff}
.dark-sec .lede{color:var(--dark-soft)}
.dark-sec .lede strong{color:#fff}

/* --- 8. home ------------------------------------------------------------- */
.hero{padding:104px 0 88px; border-bottom:1px solid var(--line)}
.hero-title{
  font-size:clamp(36px,5.2vw,58px); line-height:1.06; margin:0 0 30px;
  max-width:26ch; text-wrap:balance;
}
.hero-sub{font-size:19px; color:var(--ink-soft); max-width:62ch; margin:0 0 38px}
.hero-sub strong{color:var(--ink); font-weight:500}

.dirs{margin-top:52px; display:grid; gap:0}
.dir{
  display:grid; grid-template-columns:74px 1fr; gap:8px;
  padding:32px 0; border-top:1px solid var(--line);
}
.dir:last-child{border-bottom:1px solid var(--line)}
.dir-num{
  font-family:'Newsreader',Georgia,serif; font-size:19px; color:var(--accent);
  padding-top:2px;
}
.dir h3{margin:0 0 11px; font-size:20px; font-weight:600; letter-spacing:-.01em}
.dir p{margin:0; color:var(--ink-soft); max-width:64ch}
.dir .open-q{
  margin-top:15px; font-family:'Newsreader',Georgia,serif; font-style:italic;
  font-size:17.5px; color:var(--accent); max-width:58ch;
}
@media(max-width:640px){
  .dir{grid-template-columns:1fr; gap:0}
  .dir-num{margin-bottom:8px}
}

.exchange{display:grid; grid-template-columns:repeat(auto-fit,minmax(240px,1fr)); gap:26px; margin-top:50px}
.ex{border-top:2px solid rgba(255,255,255,.16); padding-top:20px}
.ex h3{
  margin:0 0 14px; font-size:12.5px; letter-spacing:.14em; text-transform:uppercase;
  color:var(--accent-on-dark); font-weight:600;
}
.ex ul{margin:0; padding-left:19px; color:var(--dark-soft); font-size:15.5px}
.ex li{margin-bottom:9px}
.ex li:last-child{margin-bottom:0}

.join-inner{text-align:center; max-width:60ch; margin:0 auto}
.join-inner .sec-title{max-width:none; margin-left:auto; margin-right:auto}
.join-inner .lede{margin-left:auto; margin-right:auto}
.join-inner .btn-row{justify-content:center; margin-top:32px}

/* --- 9. research index --------------------------------------------------- */
/* Axis-specific on purpose: these elements also carry .wrap or .wrap-read, and
   a `padding` shorthand here would reset their horizontal gutter to zero. */
.page-head{padding-top:88px; padding-bottom:64px; border-bottom:1px solid var(--line)}
.page-title{font-size:clamp(32px,4.6vw,50px); line-height:1.1; margin:0 0 26px; max-width:20ch}
.page-sub{font-size:19px; color:var(--ink-soft); max-width:64ch; margin:0}

/* areas: a numbered list, same rhythm as the home directions */
.areas{margin-top:52px}
.area{
  display:grid; grid-template-columns:200px 1fr; gap:34px;
  padding:36px 0; border-top:1px solid var(--line);
}
.area:last-child{border-bottom:1px solid var(--line)}
.area-side h3{margin:0 0 12px; font-size:19px; font-weight:600; letter-spacing:-.01em}
.area-tag{
  display:inline-block; font-size:11.5px; letter-spacing:.13em; text-transform:uppercase;
  font-weight:600; padding:3px 9px; border-radius:20px; border:1px solid var(--line);
  color:var(--ink-faint); background:#fffdf8;
}
.area-tag.on{color:var(--accent); border-color:#cdc7ee; background:#f0eefa}
.area-body p{margin:0; color:var(--ink-soft)}
.area-body .open-q{
  margin-top:16px; font-family:'Newsreader',Georgia,serif; font-style:italic;
  font-size:17.5px; color:var(--accent); max-width:58ch;
}
@media(max-width:760px){
  .area{grid-template-columns:1fr; gap:14px}
}

/* publications. One entry so far, so it is a card rather than a list row: a
   single row under a column header reads as an empty table. */
.pubs{margin-top:44px; display:grid; gap:22px}
.pub{
  display:block; padding:30px 0; border-top:1px solid var(--line); color:inherit;
}
.pub:last-child{border-bottom:1px solid var(--line)}
.pub:hover{text-decoration:none}
.pub:hover .pub-title{color:var(--accent)}

.pub-feature{
  display:block; color:inherit; background:#fffdf8; border:1px solid var(--line);
  border-radius:var(--radius); padding:30px 30px 26px;
  transition:border-color .18s ease, box-shadow .18s ease;
}
.pub-feature:hover{
  text-decoration:none; border-color:#c9c2ee;
  box-shadow:0 2px 20px rgba(75,64,166,.07);
}
.pub-feature:hover .pub-title{color:var(--accent)}
.pub-feature:hover .pub-more{text-decoration:underline}
.pub-feature:focus-visible{outline:2px solid var(--accent); outline-offset:3px}
.pub-feature .pub-title{font-size:27px; max-width:30ch}

/* the three designs, and what each scored */
.shot{margin:24px 0 0}
.shot img{display:block; width:100%; border-radius:8px}
.shot-legend{
  display:grid; grid-template-columns:repeat(3,1fr); gap:10px;
  margin-top:4px; padding-top:14px; border-top:1px solid var(--line);
}
.shot-legend div{text-align:center}
.shot-legend b{
  display:block; font-family:'Newsreader',Georgia,serif; font-weight:500;
  font-size:26px; letter-spacing:-.02em; color:var(--ink-soft); line-height:1.1;
  font-variant-numeric:tabular-nums;
}
.shot-legend span{display:block; font-size:13.5px; color:var(--ink-faint); margin-top:5px}
.shot-legend .won b{color:var(--accent)}
.shot-legend .won span{color:var(--ink-soft)}
.shot-note{margin:16px 0 0; font-size:14.5px; color:var(--ink-faint); text-align:center}
@media(max-width:560px){
  .pub-feature{padding:24px 20px 22px}
  .shot-legend b{font-size:21px}
  .shot-legend span{font-size:12.5px}
}
.pub-meta{
  font-size:12.5px; letter-spacing:.1em; text-transform:uppercase;
  color:var(--ink-faint); font-weight:600; margin-bottom:12px;
}
.pub-title{
  font-family:'Newsreader',Georgia,serif; font-weight:500; letter-spacing:-.02em;
  font-size:25px; line-height:1.24; margin:0 0 12px; max-width:34ch;
  transition:color .15s ease;
}
.pub-blurb{margin:0; color:var(--ink-soft); font-size:16px; max-width:68ch}
.pub-foot{margin-top:16px; display:flex; gap:10px; flex-wrap:wrap; align-items:center}
.tag{
  font-size:12.5px; color:var(--ink-faint); border:1px solid var(--line);
  border-radius:20px; padding:3px 11px; background:#fffdf8;
}
.pub-more{font-size:14.5px; font-weight:500; color:var(--accent); margin-left:auto}

/* --- 10. research post --------------------------------------------------- */
.post-head{padding-top:76px}
.post-kicker{
  font-size:12.5px; letter-spacing:.12em; text-transform:uppercase;
  color:var(--accent); font-weight:600; margin-bottom:22px;
}
.post-title{font-size:clamp(31px,4.3vw,46px); line-height:1.12; margin:0 0 22px}
.post-sub{font-size:19.5px; color:var(--ink-soft); margin:0 0 30px}
.post-byline{
  font-size:14.5px; color:var(--ink-faint); padding-bottom:26px;
  border-bottom:1px solid var(--line);
}
.post-byline b{color:var(--ink-soft); font-weight:500}

.post{padding-top:44px; padding-bottom:88px}
.post p{margin:0 0 22px; color:var(--ink-soft)}
.post p strong{color:var(--ink); font-weight:600}
.post h2{
  font-family:'Newsreader',Georgia,serif; font-weight:500; letter-spacing:-.02em;
  font-size:29px; line-height:1.2; margin:52px 0 20px; color:var(--ink);
}
.post h3{font-size:18px; font-weight:600; margin:34px 0 12px; color:var(--ink)}
.post .lede-para{font-size:19.5px; color:var(--ink); margin-bottom:30px}
.post ul{margin:0 0 22px; padding-left:22px; color:var(--ink-soft)}
.post li{margin-bottom:10px}
.post .statement{margin:34px 0}

/* the download strip under the title */
.grab{
  display:flex; gap:14px; flex-wrap:wrap; align-items:center;
  margin:30px 0 0; padding:20px 22px; border:1px solid var(--line);
  border-radius:var(--radius); background:#fffdf8;
}
.grab-t{font-size:15px; font-weight:600; margin:0}
.grab-s{font-size:14px; color:var(--ink-faint); margin:2px 0 0}
.grab .btn{margin-left:auto; padding:11px 20px; font-size:14.5px}
@media(max-width:560px){ .grab .btn{margin-left:0; width:100%; text-align:center} }

/* figures, allowed to break the reading measure */
.fig{margin:44px 0; max-width:none}
.fig img{
  display:block; width:100%; border:1px solid var(--line); border-radius:10px;
  background:#fff;
}
.fig figcaption{
  margin-top:14px; font-size:14.5px; color:var(--ink-faint); line-height:1.55;
}
.fig figcaption b{color:var(--ink-soft); font-weight:600}
@media(min-width:1080px){
  .fig-wide{width:min(980px, calc(100vw - 56px)); margin-left:calc((var(--readw) - 56px - min(980px, calc(100vw - 56px))) / 2)}
}

/* result blocks */
.result{
  margin:34px 0; padding:26px 26px 24px; border:1px solid var(--line);
  border-left:3px solid var(--accent); border-radius:0 var(--radius) var(--radius) 0;
  background:#fffdf8;
}
.result-n{
  font-size:12px; letter-spacing:.14em; text-transform:uppercase;
  color:var(--accent); font-weight:600; margin-bottom:10px;
}
.result h3{margin:0 0 12px; font-size:19px; font-weight:600; line-height:1.35}
.result p{margin:0 0 14px; font-size:16px}
.result p:last-child{margin-bottom:0}

/* numbers table. The caption sits outside .tbl-wrap: a <caption> is always as
   wide as its table, so inside the scroll container it was clipped on narrow
   screens, and the caption is the part that explains the numbers. */
.tbl{margin:30px 0}
.tbl-wrap{overflow-x:auto}
.tbl-wrap:focus-visible{outline:2px solid var(--accent); outline-offset:2px}
table{border-collapse:collapse; width:100%; font-size:15.5px; min-width:480px}
th,td{text-align:left; padding:11px 14px; border-bottom:1px solid var(--line)}
thead th{
  font-size:12.5px; letter-spacing:.08em; text-transform:uppercase;
  color:var(--ink-faint); font-weight:600; border-bottom:1px solid var(--ink-faint);
}
td{color:var(--ink-soft)}
th[scope="row"]{font-weight:400; color:var(--ink-soft)}
td.num{font-variant-numeric:tabular-nums; white-space:nowrap}
tr.win th,tr.win td{color:var(--ink); font-weight:600}
tr.win th[scope="row"]{box-shadow:inset 3px 0 0 var(--accent)}
.tbl figcaption{padding-top:12px; font-size:14px; color:var(--ink-faint); line-height:1.55}

/* the honesty block */
.caveat{
  margin:48px 0 0; padding:28px 28px 24px; border:1px solid var(--line);
  border-radius:var(--radius); background:#f1efe7;
}
.caveat h2{margin:0 0 14px; font-size:22px}
.caveat ul{margin:0; padding-left:20px}
.caveat li{font-size:15.5px; color:var(--ink-soft)}

/* next / prev strip */
.post-foot{
  margin-top:56px; padding-top:30px; border-top:1px solid var(--line);
  display:flex; gap:16px; flex-wrap:wrap; align-items:center;
}
.post-foot p{margin:0; font-size:15.5px; color:var(--ink-soft); max-width:46ch}
.post-foot .btn{margin-left:auto}
@media(max-width:640px){ .post-foot .btn{margin-left:0} }

/* --- 11. footer ---------------------------------------------------------- */
footer{border-top:1px solid var(--line); padding:44px 0; font-size:14.5px; color:var(--ink-faint)}
.foot-in{display:flex; justify-content:space-between; gap:20px; flex-wrap:wrap; align-items:center}

/* --- 12. modal ----------------------------------------------------------- */
.modal-bg{
  position:fixed; inset:0; background:rgba(21,20,32,.55); backdrop-filter:blur(3px);
  display:none; align-items:flex-start; justify-content:center; z-index:60;
  padding:36px 20px; overflow-y:auto;
}
.modal-bg.open{display:flex}
.modal{
  background:var(--paper); border-radius:var(--radius); max-width:540px; width:100%;
  padding:34px 32px; position:relative; border:1px solid var(--line);
}
.modal h3{margin:0 0 8px; font-size:25px}
.modal .sub{margin:0 0 26px; color:var(--ink-soft); font-size:15.5px}
.close{
  position:absolute; top:16px; right:18px; background:none; border:0; cursor:pointer;
  font-size:24px; line-height:1; color:var(--ink-faint); padding:4px;
}
.close:hover{color:var(--ink)}
.field{margin-bottom:17px}
.field label{display:block; font-size:14px; font-weight:500; margin-bottom:6px}
.field input,.field select,.field textarea{
  width:100%; padding:11px 13px; border:1px solid var(--line); border-radius:9px;
  font-family:inherit; font-size:15px; background:#fffdf8; color:var(--ink);
}
.field input:focus,.field select:focus,.field textarea:focus{
  outline:none; border-color:var(--accent);
}
.field input:focus-visible,.field select:focus-visible,.field textarea:focus-visible{
  outline:2px solid var(--accent); outline-offset:1px;
}
.field textarea{min-height:96px; resize:vertical}
.hint{font-size:13px; color:var(--ink-faint); margin-top:5px}
.hp{position:absolute; left:-9999px}
.form-status{margin-top:14px; font-size:14.5px; color:var(--ink-soft)}
.modal .btn-primary{width:100%; margin-top:6px}

/* --- 13. reveal ----------------------------------------------------------
   Gated on .js-reveal, which assets/site.js sets on <html> before it does
   anything else. If that request fails the content is simply visible, instead
   of being hidden by CSS with nothing left to reveal it. */
.js-reveal .reveal{opacity:0; transform:translateY(14px); transition:opacity .6s ease, transform .6s ease}
.js-reveal .reveal.in{opacity:1; transform:none}
@media(prefers-reduced-motion:reduce){
  .js-reveal .reveal{opacity:1; transform:none; transition:none}
  html{scroll-behavior:auto}
}