@font-face{font-family:"Atkinson Hyperlegible";src:url("/fonts/atkinson-hyperlegible-latin-400-normal.woff2") format("woff2");font-weight:400;font-display:swap}
@font-face{font-family:"Atkinson Hyperlegible";src:url("/fonts/atkinson-hyperlegible-latin-700-normal.woff2") format("woff2");font-weight:700;font-display:swap}
:root{
  --mist:#EAF0EE; --paper:#F7FAF9; --ink:#1F2D2A; --muted:#566662;
  --sage:#3F6F62; --line:#C9D6D2; --cell:#DCE7E3;
  color-scheme:light dark;
}
@media (prefers-color-scheme:dark){:root{
  --mist:#141D1B; --paper:#1A2523; --ink:#E2EAE7; --muted:#9DB0AB;
  --sage:#8CC0B0; --line:#2E3E3A; --cell:#22312E;
}}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--mist);color:var(--ink);
  font-family:"Atkinson Hyperlegible",system-ui,-apple-system,"Segoe UI",sans-serif;
  font-size:1.0625rem;line-height:1.6}
a{color:var(--sage);text-underline-offset:.2em}
a:focus-visible{outline:2px solid var(--sage);outline-offset:3px;border-radius:2px}
.wrap{max-width:40rem;margin:0 auto;padding:0 1.5rem}
header.site{display:flex;justify-content:space-between;align-items:baseline;padding:1.5rem 0}
header.site .name{font-weight:700;color:var(--ink);text-decoration:none;font-size:1.125rem}
header.site .lang{font-size:.9375rem}
main{padding:1rem 0 4rem}
h1{font-size:2.25rem;line-height:1.15;margin:0 0 1rem;letter-spacing:-.01em}
h2{font-size:1.25rem;line-height:1.3;margin:2.25rem 0 .5rem}
p,ul{margin:0 0 1rem}
.lead{font-size:1.25rem;color:var(--muted);max-width:32rem}
.updated{color:var(--muted);font-size:.9375rem}
/* Hero: one quiet 3x3 sudoku box */
.hero{display:grid;gap:2.5rem;padding:2rem 0 1rem}
@media (min-width:40rem){.hero{grid-template-columns:auto 1fr;align-items:center}}
.box{display:grid;justify-self:start;width:max-content;grid-template-columns:repeat(3,4.25rem);grid-template-rows:repeat(3,4.25rem);
  background:var(--paper);border:2px solid var(--ink);border-radius:6px;overflow:hidden}
.box span{display:grid;place-items:center;font-size:1.75rem;font-weight:700;
  border-right:1px solid var(--line);border-bottom:1px solid var(--line)}
.box span:nth-child(3n){border-right:0}
.box span:nth-child(n+7){border-bottom:0}
.box .given{color:var(--ink)}
.box .placed{color:var(--sage);font-weight:400}
.box .here{background:var(--cell)}
@media (prefers-reduced-motion:no-preference){
  .box .here{animation:breathe 4s ease-in-out infinite}
  @keyframes breathe{50%{background:transparent}}
}
.facts{list-style:none;padding:0;margin:2.5rem 0 0;border-top:1px solid var(--line)}
.facts li{padding:.875rem 0;border-bottom:1px solid var(--line)}
.store{margin-top:2rem;color:var(--muted)}
/* Long-form pages */
.doc h2:first-of-type{margin-top:1.75rem}
.doc address{font-style:normal}
dl.faq dt{font-weight:700;margin-top:1.5rem}
dl.faq dd{margin:.25rem 0 0}
.contact{background:var(--paper);border:1px solid var(--line);border-radius:6px;padding:1.25rem 1.5rem;margin:1.5rem 0}
footer.site{border-top:1px solid var(--line);padding:1.5rem 0 2.5rem;font-size:.9375rem;color:var(--muted)}
footer.site nav{display:flex;flex-wrap:wrap;gap:1.25rem;margin-bottom:.5rem}