:root {
  --paper: #f6f3ec; --ink: #1c1b19; --muted: #6b665c; --key: #fffdf8; --edge: #d9d3c5; --card: #fffaf0;
  --ok: oklch(.55 .15 150); --bad: oklch(.55 .2 25); --focus: oklch(.55 .2 260); --accent: oklch(.6 .17 45);
  --cat-l: .68; --cat-c: .14;
  --r: 14px; --press: 0 3px 0 var(--edge);
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --paper: #16151a; --ink: #f1eee8; --muted: #a19c92; --key: #232129; --edge: #0b0a0d; --card: #1d1c22;
    --ok: oklch(.75 .15 150); --bad: oklch(.72 .17 25); --focus: oklch(.75 .15 260); --accent: oklch(.75 .15 45);
    --cat-l: .76; --cat-c: .13;
  }
}
:root[data-theme="dark"] {
  --paper: #16151a; --ink: #f1eee8; --muted: #a19c92; --key: #232129; --edge: #0b0a0d; --card: #1d1c22;
  --ok: oklch(.75 .15 150); --bad: oklch(.72 .17 25); --focus: oklch(.75 .15 260); --accent: oklch(.75 .15 45);
  --cat-l: .76; --cat-c: .13;
}

* { box-sizing: border-box; }
html { background: var(--paper); }
body {
  margin: 0 auto; max-width: 1000px; padding: 0 16px 32px; background: var(--paper); color: var(--ink);
  font: 16px/1.5 system-ui, -apple-system, "Segoe UI", sans-serif;
}
a { color: inherit; }
:focus-visible { outline: 3px solid var(--focus); outline-offset: 2px; }
h1 { font-size: clamp(28px, 6vw, 44px); line-height: 1.1; margin: 8px 0 12px; letter-spacing: -.02em; }
h2 { font-size: 20px; margin: 0 0 8px; }
p { margin: 0 0 12px; }
.muted { color: var(--muted); }
.sr { position: absolute; width: 1px; height: 1px; overflow: hidden; clip-path: inset(50%); white-space: nowrap; }

.top { display: flex; align-items: center; justify-content: space-between; gap: 12px; padding: 16px 0; flex-wrap: wrap; }
.logo { font-weight: 800; font-size: 22px; text-decoration: none; display: flex; gap: 6px; align-items: center; }
.top nav { display: flex; gap: 4px; flex-wrap: wrap; }
.top nav a { text-decoration: none; padding: 8px 12px; border-radius: 10px; }
.top nav a[aria-current="page"] { background: var(--key); box-shadow: var(--press); }
.foot { margin-top: 40px; color: var(--muted); font-size: 14px; }

.card { background: var(--card); border: 1px solid var(--edge); border-radius: 18px; padding: 20px; margin: 16px 0; }
.grid2 { display: grid; gap: 16px; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); }
.grid2 > .card { margin: 0; }
.hero .card h2 { display: flex; gap: 8px; align-items: center; }

button, .btn {
  min-height: 44px; padding: 0 16px; border-radius: 10px; border: 2px solid var(--edge); background: var(--key);
  color: var(--ink); font: inherit; font-weight: 600; cursor: pointer; text-decoration: none;
  display: inline-flex; align-items: center; gap: 6px;
}
button.primary, .btn.primary { background: var(--accent); border-color: transparent; color: #1a1000; }
button:disabled { opacity: .5; cursor: default; }
.bar { display: flex; gap: 8px; flex-wrap: wrap; align-items: center; margin: 12px 0; }
input[type="text"], input[type="number"], textarea {
  width: 100%; min-height: 44px; font: inherit; padding: 8px 12px; border-radius: 10px;
  border: 2px solid var(--edge); background: var(--key); color: var(--ink);
}
textarea { min-height: 88px; resize: vertical; }
label { font-weight: 600; display: block; margin: 8px 0 4px; }

.msg { min-height: 1.5em; margin: 8px 0; }
.msg.bad { color: var(--bad); }
.msg.ok { color: var(--ok); }

/* code display: tiles with emoji, name and position */
.code { display: flex; flex-wrap: wrap; gap: 14px; margin: 12px 0; }
.group { display: flex; gap: 6px; padding: 0; margin: 0; list-style: none; }
.tile {
  --cat: oklch(var(--cat-l) var(--cat-c) var(--h, 0));
  width: 64px; min-height: 84px; background: var(--key); border-radius: var(--r); box-shadow: var(--press);
  display: grid; grid-template-rows: 1fr auto; place-items: center; padding: 14px 2px 6px; position: relative;
  border-bottom: 4px solid var(--cat);
}
.tile .e { font-size: 36px; line-height: 1; }
.tile .n { font: 600 10px ui-monospace, monospace; text-transform: uppercase; letter-spacing: .03em; color: var(--muted);
  max-width: 60px; overflow: hidden; text-overflow: ellipsis; }
.tile .p { position: absolute; top: 3px; left: 6px; font: 10px ui-monospace, monospace; color: var(--muted); }
.tile.check { border-bottom-style: dashed; }
.tile.empty { border-bottom-color: var(--edge); }
.tile.empty .e { opacity: .2; }
.tile.cursor { outline: 2px dashed var(--focus); outline-offset: 2px; }
.code.big .tile { width: 84px; min-height: 104px; }
.code.big .tile .e { font-size: 50px; }
.code.big .tile .n { font-size: 11px; max-width: 80px; }
.code.small .tile { width: 48px; min-height: 64px; padding-top: 10px; }
.code.small .tile .e { font-size: 26px; }
.code.small .tile .n { display: none; }
.code[data-state="ok"] .tile { border-bottom-color: var(--ok); }
.code[data-state="bad"] .tile:not(.empty) { border-bottom-color: var(--bad); }
.spoken { font: 14px ui-monospace, monospace; color: var(--muted); word-break: break-word; }

/* keypad */
.pad { margin-top: 8px; }
.pad .typing { display: flex; gap: 8px; }
.pad .typing input { flex: 1; }
.sugg { display: flex; gap: 6px; flex-wrap: wrap; min-height: 44px; margin: 8px 0; }
.sugg button { font-weight: 500; }
.tabs { display: grid; grid-template-columns: repeat(8, 1fr); gap: 4px; margin: 8px 0; }
.tab {
  --cat: oklch(var(--cat-l) var(--cat-c) var(--h, 0));
  min-height: 44px; padding: 0; justify-content: center; font-size: 22px; border: 0; border-top: 4px solid var(--cat);
  box-shadow: var(--press);
}
.tab[aria-selected="true"] { background: var(--cat); }
.keys { display: grid; grid-template-columns: repeat(4, 1fr); gap: 6px; }
.key {
  --cat: oklch(var(--cat-l) var(--cat-c) var(--h, 0));
  flex-direction: column; justify-content: center; gap: 2px; min-height: 64px; padding: 4px; border: 0;
  border-bottom: 3px solid var(--cat); box-shadow: var(--press); transition: transform .08s, box-shadow .08s;
}
.key .e { font-size: 30px; line-height: 1; }
.key .n { font: 500 10px ui-monospace, monospace; color: var(--muted); }
.key:active { transform: translateY(3px); box-shadow: none; }
@media (min-width: 720px) { .keys { grid-template-columns: repeat(8, 1fr); } .pad .keys .key { min-height: 72px; } }

.choices { display: flex; gap: 12px; flex-wrap: wrap; margin: 12px 0; }
.choices button { font-size: 36px; min-height: 72px; padding: 0 20px; }
.context { font-size: 18px; }
.context strong { display: block; font-size: 22px; }
.countdown { font: 600 14px ui-monospace, monospace; color: var(--muted); }
.keybox { border: 2px dashed var(--accent); }
dl.kv { display: grid; grid-template-columns: max-content 1fr; gap: 4px 16px; margin: 0; }
dl.kv dt { color: var(--muted); }
dl.kv dd { margin: 0; word-break: break-word; }
pre { background: var(--key); border: 1px solid var(--edge); border-radius: 10px; padding: 12px; overflow-x: auto; font-size: 13px; }

@media (prefers-reduced-motion: reduce) { * { transition: none !important; animation: none !important; } }

h2.sub { font-size: 17px; margin-top: 20px; }
label.inline { display: inline; margin: 0; }
select { min-height: 44px; font: inherit; padding: 0 12px; border-radius: 10px; border: 2px solid var(--edge); background: var(--key); color: var(--ink); }