/* Chave Inglesa — design tokens + base.
   Direction A "Marca-texto": notebook paper, black ink, one lime highlighter.
   Lime has ONE meaning: "this word is one of the 100". Pink = cognate (reserved). Never decoration.
   Display: Bricolage Grotesque. Body + game words: Atkinson Hyperlegible. */
:root{
  --paper:#FBFBF7; --ink:#16161A; --ink-2:#4A4A52; --line:#16161A; --line-soft:#DCDCD5; --card:#FFFFFF;
  --lime:#D4FF3A; --pink:#FF9ECB; --mark-fg:#16161A;
  --btn-bg:#16161A; --btn-fg:#D4FF3A;
  --wrong:#C2362B; --wrong-soft:#FBE4E1;
  --display:"Bricolage Grotesque",ui-sans-serif,system-ui,sans-serif; --body:"CI Digits","Atkinson Hyperlegible",ui-sans-serif,system-ui,sans-serif;
  --r-s:6px; --r-m:8px; --r-l:10px;
  --shadow:4px 4px 0 var(--ink);
  --tap:48px;
  color-scheme:light;
}
@media (prefers-color-scheme: dark){
  :root:not([data-theme="light"]){
    --paper:#16161A; --ink:#FBFBF7; --ink-2:#B9B9C0; --line:#FBFBF7; --line-soft:#3A3A40; --card:#222228;
    --btn-bg:#D4FF3A; --btn-fg:#16161A; --wrong:#F2705C; --wrong-soft:#3A221E; color-scheme:dark;
  }
}
:root[data-theme="dark"]{
  --paper:#16161A; --ink:#FBFBF7; --ink-2:#B9B9C0; --line:#FBFBF7; --line-soft:#3A3A40; --card:#222228;
  --btn-bg:#D4FF3A; --btn-fg:#16161A; --wrong:#F2705C; --wrong-soft:#3A221E; color-scheme:dark;
}
/* Atkinson draws a slashed zero ("1ØØ"); digits come from Bricolage instead, self-hosted subset. */
@font-face{font-family:"CI Digits";src:url(/assets/fonts/digits-400.ttf) format("truetype");font-weight:400;unicode-range:U+0030-0039;font-display:swap}
@font-face{font-family:"CI Digits";src:url(/assets/fonts/digits-700.ttf) format("truetype");font-weight:700;unicode-range:U+0030-0039;font-display:swap}
*{box-sizing:border-box}
[hidden]{display:none!important}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--paper);color:var(--ink);font-family:var(--body);font-size:17px;line-height:1.5;font-weight:400;
  padding-left:max(16px,env(safe-area-inset-left,0px));padding-right:max(16px,env(safe-area-inset-right,0px))}
h1,h2,h3{font-family:var(--display);font-weight:800;letter-spacing:-.035em;line-height:1;margin:0}
h1{font-size:clamp(2.6rem,11vw,4.2rem)}
h2{font-size:clamp(1.8rem,7vw,2.6rem)}
h3{font-size:1.25rem;line-height:1.15;letter-spacing:-.02em}
p{margin:0}
a{color:inherit}
button,input{font:inherit}
mark,.mark{background:var(--lime);color:var(--mark-fg);padding:0 2px}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:var(--tap);padding:12px 20px;border-radius:var(--r-m);
  font-family:var(--display);font-weight:800;font-size:1.1rem;cursor:pointer;border:2px solid transparent;text-decoration:none;letter-spacing:-.01em}
.btn-primary{background:var(--btn-bg);color:var(--btn-fg);border-color:var(--btn-bg)}
.btn-ghost{background:transparent;color:var(--ink);border-color:var(--line)}
.btn:focus-visible,input:focus-visible,summary:focus-visible,a:focus-visible,button:focus-visible{outline:3px solid var(--ink);outline-offset:3px;box-shadow:0 0 0 6px var(--lime)}
.btn[disabled]{opacity:.6;cursor:progress}
.field{display:flex;flex-direction:column;gap:8px}
.field input,.form input{min-height:var(--tap);padding:12px 14px;border-radius:var(--r-s);border:2px solid var(--line);background:var(--card);color:var(--ink)}
input[aria-invalid="true"]{border-color:var(--wrong)}
.note{font-size:.92rem;color:var(--ink-2)}
.ok{background:var(--lime);color:var(--mark-fg);padding:12px 14px;border-radius:var(--r-s);border:2px solid var(--ink)}
.err{background:var(--wrong-soft);color:var(--wrong);padding:12px 14px;border-radius:var(--r-s)}
.sr{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0)}
/* The key mark */
.k-body{fill:var(--ink)} .k-hole{fill:var(--paper)} .k-tooth{fill:var(--lime);stroke:var(--ink)} .k-word{fill:var(--mark-fg);font-family:var(--body);font-weight:700}
@media (prefers-reduced-motion: reduce){*{animation:none!important;transition:none!important}}