/* Empathy project page. A light page in the poster's navy and red; the slides above
   it are the dark counterpart. Hues keep the deck's meanings: amber = warmth,
   teal = adaptive tone, grey = no-tone control, blue = gain, red = loss. */
:root{
  color-scheme: light;
  --navy:#0f2a4a;
  --navy-2:#173a63;
  --ink:#1b2430;
  --muted:#566273;
  --dim:#8592a3;
  --line:#e1e6ee;
  --bg:#ffffff;
  --bg-2:#f4f6f9;
  --red:#9c2a35;
  --warm:#c97a22;
  --warm-bg:#fbf1e3;
  --adapt:#1b8f7d;
  --notone:#7d8ca0;
  --gain:#2f6fb5;
  --loss:#c0473d;
  --f-display:"Merriweather",Georgia,serif;
  --f-body:"Fira Sans",system-ui,-apple-system,"Segoe UI",sans-serif;
  --f-mono:"Fira Mono",ui-monospace,SFMono-Regular,Menlo,monospace;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:64px}
body{margin:0;background:var(--bg);color:var(--ink);font:400 17px/1.65 var(--f-body);-webkit-font-smoothing:antialiased}
img{max-width:100%;display:block}
a{color:var(--gain);text-decoration:none}
a:hover{text-decoration:underline}
h1,h2,h3,p{margin:0}
.wrap{max-width:1080px;margin:0 auto;padding-left:max(20px, env(safe-area-inset-left, 0px));padding-right:max(20px, env(safe-area-inset-right, 0px))}
.narrow{max-width:820px}

/* hero */
.hero{background:var(--navy);color:#fff;padding-block:56px 64px;
  background-image:radial-gradient(900px 420px at 85% 0%, rgba(242,179,91,.16), transparent 65%)}
.hero .wrap{display:flex;flex-direction:column;align-items:center;text-align:center;gap:18px}
.badge{font:600 14px/1 var(--f-mono);letter-spacing:.12em;color:#1a1204;background:#f2b35b;padding:8px 11px;border-radius:7px}
.hero h1{font:900 clamp(30px,4.6vw,50px)/1.15 var(--f-display);letter-spacing:-.01em;max-width:960px;text-wrap:balance}
.hero h1 em{font-style:normal;color:#f2b35b}
.authors{font-size:clamp(17px,2vw,20px);line-height:1.6}
.authors a{color:#fff;border-bottom:1px solid rgba(255,255,255,.35)}
.authors a:hover{text-decoration:none;border-bottom-color:#fff}
.authors sup{font-size:.62em;color:#c9d6e8}
.affil{font-size:15px;line-height:1.6;color:#c9d6e8}
.btns{display:flex;flex-wrap:wrap;justify-content:center;gap:10px;margin-top:6px}
.btns a{display:inline-flex;align-items:center;gap:8px;font:500 15px/1 var(--f-body);color:#fff;border:1px solid rgba(255,255,255,.4);border-radius:999px;padding:11px 18px}
.btns a:hover{text-decoration:none;background:rgba(255,255,255,.1);border-color:#fff}
.btns a.pri{background:#fff;color:var(--navy);border-color:#fff}
.btns svg{width:16px;height:16px}

/* sticky section nav */
.nav{position:sticky;top:0;z-index:20;background:rgba(255,255,255,.94);backdrop-filter:blur(8px);border-bottom:1px solid var(--line)}
.nav .wrap{display:flex;gap:4px;overflow-x:auto;scrollbar-width:none}
.nav a{font:500 14px/1 var(--f-body);color:var(--muted);padding:15px 12px;white-space:nowrap;border-bottom:2px solid transparent}
.nav a:hover{text-decoration:none;color:var(--ink)}
.nav a.on{color:var(--navy);border-bottom-color:var(--red)}

/* slides */
.deck{padding-block:40px 8px}
.deckframe{position:relative;width:100%;aspect-ratio:16/9;max-width:100%;border-radius:12px;overflow:hidden;background:#071122;box-shadow:0 18px 50px rgba(15,42,74,.28)}
.deckframe iframe{position:absolute;inset:0;width:100%;height:100%;border:0;display:block}
.deckcap{font-size:14px;line-height:1.55;color:var(--muted);margin-top:12px}
.deckcap b{font-family:var(--f-mono);font-weight:500;color:var(--ink)}

/* sections */
section.sec{padding-block:44px}
section.sec + section.sec{border-top:1px solid var(--line)}
.kicker{font:500 13px/1 var(--f-mono);letter-spacing:.12em;text-transform:uppercase;color:var(--red);margin-bottom:10px}
h2{font:700 clamp(24px,3vw,31px)/1.25 var(--f-display);color:var(--navy);text-wrap:balance;margin-bottom:16px}
h3{font:600 19px/1.35 var(--f-body);color:var(--ink)}
p + p{margin-top:12px}
.lead{font-size:19px;line-height:1.6}
.muted{color:var(--muted)}
.tldr{background:var(--warm-bg);border-left:4px solid var(--warm);border-radius:0 10px 10px 0;padding:16px 20px;font-size:18px;line-height:1.6}
.tldr b{color:var(--ink)}
.stats{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:14px;margin-top:22px}
.stat{border:1px solid var(--line);border-radius:12px;padding:16px 18px;background:var(--bg-2)}
.stat .v{font:900 30px/1 var(--f-display);color:var(--navy);font-variant-numeric:tabular-nums}
.stat .l{font-size:14px;line-height:1.4;color:var(--muted);margin-top:8px}
ul.find{margin:14px 0 0;padding:0;list-style:none;display:flex;flex-direction:column;gap:10px}
ul.find li{position:relative;padding-left:24px}
ul.find li::before{content:"";position:absolute;left:4px;top:.62em;width:9px;height:9px;border-radius:50%;background:var(--warm)}
.grid2{display:grid;grid-template-columns:minmax(0,1.15fr) minmax(0,1fr);gap:32px;align-items:start}
.grid2.tbl{grid-template-columns:minmax(0,.85fr) minmax(0,1.15fr)}
figure{margin:18px 0 0}
figure img{border:1px solid var(--line);border-radius:10px;background:#fff}
figcaption{font-size:14px;line-height:1.55;color:var(--muted);margin-top:8px}
.hw{color:var(--warm);font-weight:600}.ha{color:var(--adapt);font-weight:600}.hn{color:var(--notone);font-weight:600}

/* tabs + heatmaps */
.tabs{display:inline-flex;border:1px solid var(--line);border-radius:10px;overflow:hidden;margin:6px 0 12px;max-width:100%;overflow-x:auto}
.tabs button{font:500 15px/1 var(--f-body);color:var(--muted);background:#fff;border:0;border-right:1px solid var(--line);padding:10px 14px;cursor:pointer;white-space:nowrap}
.tabs button:last-child{border-right:0}
.tabs button[aria-pressed="true"]{background:var(--navy);color:#fff}
.tabs button:focus-visible,.toneb button:focus-visible,.copy:focus-visible{outline:2px solid var(--warm);outline-offset:2px}
.scrollx{overflow-x:auto;max-width:100%}
table.heat{border-collapse:separate;border-spacing:3px;width:100%;min-width:460px;font-variant-numeric:tabular-nums}
table.heat th{font:500 13px var(--f-mono);color:var(--dim);padding:4px;text-align:center}
table.heat th.rh{text-align:left}
table.heat td{font:500 14px var(--f-mono);text-align:center;padding:6px 4px;border-radius:6px;white-space:nowrap}
table.heat td small{font-size:12px;margin-left:5px;opacity:.85}
table.heat td.rh{font:500 15px var(--f-body);text-align:left;color:var(--ink);white-space:nowrap}
table.heat td.rh span{font:400 12px var(--f-mono);color:var(--dim);margin-left:5px}
table.heat td.base{color:var(--muted);border:1px solid var(--line)}
.legend{display:flex;align-items:center;gap:8px;font:400 13px var(--f-mono);color:var(--dim);margin-top:8px}
.legend i{display:inline-block;width:150px;height:9px;border-radius:5px;background:linear-gradient(90deg,var(--loss),#fff 50%,var(--gain))}

/* tone composition */
.toneb{display:flex;height:58px;border-radius:10px;overflow:hidden;margin-top:14px}
.toneb button{border:0;cursor:pointer;display:flex;flex-direction:column;justify-content:center;align-items:flex-start;gap:3px;padding:0 12px;color:#fff;font:600 15px var(--f-body);min-width:0;opacity:.62;transition:opacity .2s;text-align:left}
.toneb button span{font:400 13px var(--f-mono)}
.toneb button[aria-pressed="true"]{opacity:1}
.tonewhy{margin-top:12px;font-size:16px;line-height:1.6;color:var(--muted);min-height:52px}
.tonewhy b{color:var(--ink)}

/* evaluator table */
table.agree{border-collapse:collapse;width:100%;font-variant-numeric:tabular-nums;font-size:15px}
table.agree th,table.agree td{padding:9px 10px;border-bottom:1px solid var(--line);text-align:right}
table.agree th:first-child,table.agree td:first-child{text-align:left}
table.agree th{font:500 13px var(--f-mono);color:var(--dim)}
table.agree td{font-family:var(--f-mono)}
table.agree td:first-child{font-family:var(--f-body)}
table.agree tr.grp td{border-bottom:2px solid var(--line-2,#cfd6e0)}
table.agree .best{font-weight:600;color:var(--red)}

.concl{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px;margin-top:6px}
.concl div{border:1px solid var(--line);border-radius:12px;padding:16px 18px;display:grid;grid-template-columns:28px 1fr;gap:10px;background:var(--bg-2)}
.concl div span{font:900 22px/1.2 var(--f-display);color:var(--red)}
.lims{margin-top:18px;font-size:15px;line-height:1.6;color:var(--muted)}
.lims b{color:var(--ink)}

pre.bib{position:relative;background:var(--bg-2);border:1px solid var(--line);border-radius:10px;padding:18px 20px;font:400 14px/1.6 var(--f-mono);overflow-x:auto;margin:0}
.copy{position:absolute;top:10px;right:10px;font:500 13px var(--f-body);color:var(--navy);background:#fff;border:1px solid var(--line);border-radius:8px;padding:6px 10px;cursor:pointer}
footer{padding-block:28px 40px;border-top:1px solid var(--line);font-size:14px;color:var(--dim);text-align:center}

@media (max-width:820px){
  .grid2,.grid2.tbl{grid-template-columns:minmax(0,1fr)}
  .stats{grid-template-columns:repeat(2,minmax(0,1fr))}
  .concl{grid-template-columns:1fr}
}
@media (prefers-reduced-motion: reduce){html{scroll-behavior:auto}*{transition:none !important}}