@import url('../global.css');

/* =============================================================================
   Futoshiki — (2n-1)×(2n-1) grid: cells on even tracks, inequality signs on the
   odd gap tracks between them, above a 1–n input pad (same shape as Sudoku).
   ========================================================================== */

:root {
  --title-color: var(--color-futoshiki);
}

.futoshiki-area {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--spacing-md);
  width: 100%;
}

.futoshiki-grid {
  display: grid;
  grid-template-columns: repeat(var(--futoshiki-span, 9), minmax(0, 1fr));
  grid-template-rows: repeat(var(--futoshiki-span, 9), minmax(0, 1fr));
  aspect-ratio: 1;
  place-content: center;
  padding: 12px;
  background: var(--logic-grid-frame-bg);
  border: 1px solid var(--logic-grid-frame-border);
  border-radius: var(--border-radius-md);
  transition:
    background 0.2s,
    border-color 0.2s;
}

.futoshiki-cell {
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0;
  padding: 0;
  border: 1.5px solid var(--logic-grid-cell-border);
  border-radius: var(--border-radius-sm);
  background: var(--logic-grid-cell-bg);
  color: var(--logic-grid-ink);
  font-size: clamp(1rem, 5vmin, 2rem);
  font-weight: var(--font-weight-bold);
  cursor: pointer;
  transition: background 0.1s;
}

.futoshiki-cell.is-given {
  background: var(--logic-grid-cell-bg-fixed);
  border-color: var(--logic-grid-cell-border-fixed);
  color: var(--logic-grid-ink-fixed);
  cursor: default;
}
.futoshiki-cell.is-selected {
  border-color: var(--logic-grid-accent);
  background: color-mix(in srgb, var(--logic-grid-accent) 15%, var(--logic-grid-cell-bg));
}
.futoshiki-cell.is-conflict {
  color: var(--logic-grid-error-ink);
  background: var(--logic-grid-error-bg);
  border-color: var(--logic-grid-error-border);
}
.futoshiki-cell:focus-visible {
  outline: 2px solid var(--color-futoshiki);
  outline-offset: -2px;
  z-index: 1;
}

.futoshiki-sign {
  display: flex;
  align-items: center;
  justify-content: center;
  /* Signs sit in the dark gaps between cells, so use a bright accent. */
  color: var(--logic-grid-accent);
  font-size: clamp(0.85rem, 4vmin, 1.6rem);
  font-weight: var(--font-weight-bold);
  line-height: 1;
}

/* --- Input pad (same as Sudoku) ------------------------------------------- */

.futoshiki-pad {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--spacing-xs);
  width: min(92vw, 30rem);
}

.futoshiki-pad-key {
  flex: 1 1 2rem;
  max-width: 3rem;
  height: 3rem;
  border: none;
  border-radius: var(--border-radius-sm);
  background: var(--white-color);
  box-shadow: var(--shadow-sm);
  color: var(--text-color);
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-bold);
  cursor: pointer;
  transition:
    background 0.12s,
    transform 0.05s;
}
.futoshiki-pad-key:active {
  transform: scale(0.94);
}
.futoshiki-pad-key:focus-visible {
  outline: 2px solid var(--color-futoshiki);
  outline-offset: 2px;
}
.futoshiki-pad-erase {
  color: var(--error-color);
}