:root {
  color-scheme: light;
  --page: 235 231 225;
  --card: 245 242 237;
  --ink: 43 39 36;
  --body: 92 85 78;
  --muted: 98 91 84;
  --rust: 156 72 34;
  --primary: 43 39 36;
  --on-primary: 245 242 237;
  --line: 217 211 203;
}
* { box-sizing: border-box; }
html, body {
  height: 100%;
  margin: 0;
  font-family: Inter, ui-sans-serif, system-ui, sans-serif;
  background: rgb(var(--page));
  color: rgb(var(--ink));
}
body {
  display: grid;
  place-items: center;
}
main { width: min(640px, 92vw); padding: 20px 0 28px; }
.badge {
  display: inline-block;
  font-size: 12px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: rgb(var(--muted));
}
h1 { font-size: 2rem; margin: 8px 0 4px; letter-spacing: -0.03em; }
p { color: rgb(var(--body)); margin: 0 0 16px; }
.stage {
  height: 160px;
  width: 100%;
  border: 1px solid rgb(var(--line));
  border-radius: 16px;
  display: grid;
  place-items: center;
  margin-bottom: 16px;
  font-size: 3rem;
  color: rgb(var(--ink));
  cursor: pointer;
}
.stage:focus-visible,
button:focus-visible {
  outline: 2px solid rgb(var(--rust));
  outline-offset: 3px;
}
.row { display: flex; flex-wrap: wrap; gap: 8px; }
button {
  border: 1px solid transparent;
  border-radius: 10px;
  padding: 10px 16px;
  min-height: 44px;
  cursor: pointer;
  background: rgb(var(--primary));
  color: rgb(var(--on-primary));
  font-weight: 600;
}
button.ghost {
  background: rgb(var(--card));
  color: rgb(var(--ink));
  border-color: rgb(var(--line));
}
textarea {
  width: 100%;
  min-height: 70px;
  margin: 8px 0;
  background: rgb(var(--card));
  color: rgb(var(--ink));
  border: 1px solid rgb(var(--line));
  border-radius: 12px;
  padding: 8px;
  font: 12px ui-monospace, monospace;
}
#log {
  margin-top: 14px;
  font: 12px ui-monospace, monospace;
  color: rgb(var(--muted));
  max-height: 120px;
  overflow: auto;
  white-space: pre-wrap;
}
.score {
  font-variant-numeric: tabular-nums;
  color: rgb(var(--ink));
  background: rgb(var(--card));
  border-radius: 999px;
  min-width: 4.5rem;
  padding: 0.15rem 0.8rem;
  line-height: 1.2;
}