/* Block Puzzle */

.bp-stage {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.85rem;
    user-select: none;
}

.bp-hud {
    display: flex;
    gap: 1.5rem;
    font-weight: 600;
    color: var(--color-text-light);
    font-variant-numeric: tabular-nums;
    min-height: 1.4em;
}

.bp-board {
    display: grid;
    grid-template-columns: repeat(9, 1fr);
    gap: 3px;
    width: min(400px, 92vw);
    aspect-ratio: 1;
    padding: 5px;
    background: var(--color-border-light);
    border-radius: var(--radius-md);
    touch-action: manipulation;
}

.bp-cell {
    border: none;
    padding: 0;
    border-radius: 3px;
    background: var(--color-card-bg);
    cursor: pointer;
    -webkit-tap-highlight-color: transparent;
}

.bp-cell.filled { box-shadow: inset 0 -2px 0 rgba(0, 0, 0, 0.18); }

/* Where the selected shape would land. */
.bp-cell.preview {
    background: var(--color-primary);
    box-shadow: inset 0 0 0 2px var(--color-primary-dark);
}

.bp-cell.preview-bad {
    background: #ffd9d9;
    box-shadow: inset 0 0 0 2px var(--color-accent);
}

.bp-cell:focus-visible {
    outline: 3px solid var(--color-text);
    outline-offset: -3px;
}

.bp-tray {
    display: flex;
    gap: 1rem;
    align-items: center;
    justify-content: center;
    min-height: 92px;
    flex-wrap: wrap;
}

/* Each tray piece is its own little grid sized from --pr/--pc set inline. */
.bp-piece {
    display: grid;
    grid-template-columns: repeat(var(--pc, 1), 14px);
    grid-template-rows: repeat(var(--pr, 1), 14px);
    gap: 2px;
    padding: 8px;
    border: 2px solid transparent;
    border-radius: var(--radius-md);
    background: transparent;
    cursor: pointer;
    -webkit-tap-highlight-color: transparent;
}

.bp-piece i {
    display: block;
    border-radius: 2px;
}

.bp-piece .bp-gap { background: transparent; }

.bp-piece.selected {
    border-color: var(--color-primary-dark);
    background: var(--color-bg-secondary);
}

.bp-piece:focus-visible {
    outline: 3px solid var(--color-text);
    outline-offset: 2px;
}

/* A used slot keeps its space so the tray does not jump as pieces are played. */
.bp-used {
    width: 56px;
    height: 56px;
    border-radius: var(--radius-md);
    border: 2px dashed var(--color-border);
    opacity: 0.4;
}

.bp-feedback {
    min-height: 1.4em;
    margin: 0;
    font-weight: 600;
    color: var(--color-text-light);
    text-align: center;
}

.bp-btn {
    padding: 0.75rem 2rem;
    font-size: 1.05rem;
    font-weight: 600;
    border: none;
    border-radius: var(--radius-md);
    background: var(--color-primary);
    color: var(--color-text);
    cursor: pointer;
    -webkit-tap-highlight-color: transparent;
}

.bp-btn:hover { background: var(--color-primary-dark); }
.bp-btn:focus-visible {
    outline: 3px solid var(--color-text);
    outline-offset: 2px;
}