:root {
  --key-cell-size: 44px;
}

body {
  min-height: 100vh;
}

.font-monospace {
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
}

.key-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
  gap: .5rem;
}

.key-cell {
  display: flex;
  align-items: center;
  gap: .35rem;
  border: 1px solid var(--bs-border-color);
  border-radius: .5rem;
  padding: .35rem .5rem;
  background: var(--bs-body-bg);
}

.key-cell .cipher-letter {
  font-weight: 700;
  font-size: 1.05rem;
  width: 1.4rem;
  text-align: center;
  color: var(--bs-primary);
}

.key-cell .arrow {
  color: var(--bs-secondary-color);
}

.key-cell input {
  width: 2.6rem;
  text-align: center;
  text-transform: uppercase;
  font-weight: 600;
  border: 1px solid var(--bs-border-color);
  border-radius: .35rem;
  background: var(--bs-body-bg);
  color: var(--bs-body-color);
  padding: .15rem;
}

.key-cell input:focus {
  outline: 2px solid var(--bs-primary);
}

.key-cell.unassigned {
  opacity: .6;
}

.result-card {
  border: 1px solid var(--bs-border-color);
  border-radius: .6rem;
  margin-bottom: .75rem;
  overflow: hidden;
}

.result-card .result-head {
  display: flex;
  align-items: center;
  gap: .5rem;
  padding: .5rem .75rem;
  background: var(--bs-tertiary-bg);
  font-size: .85rem;
}

.result-card .result-body {
  padding: .75rem;
  font-family: "SFMono-Regular", Consolas, monospace;
  white-space: pre-wrap;
  word-break: break-word;
}

.result-card.rank-1 {
  border-color: var(--bs-primary);
  box-shadow: 0 0 0 1px var(--bs-primary);
}

.score-badge {
  font-variant-numeric: tabular-nums;
}

textarea[readonly] {
  background: var(--bs-tertiary-bg);
}

@media (max-width: 576px) {
  .key-grid { grid-template-columns: repeat(auto-fill, minmax(110px, 1fr)); }
}