.sudoku-grid-shell {
    padding: 0.85rem;
    border-radius: 28px;
    background: rgba(255, 255, 255, 0.84);
    border: 1px solid rgba(87, 76, 67, 0.14);
}

.sudoku-grid {
    display: grid;
    gap: 0;
    border-radius: 20px;
    overflow: hidden;
    background: rgba(87, 76, 67, 0.1);
}

.sudoku-cell {
    aspect-ratio: 1 / 1;
    background: rgba(248, 245, 242, 0.96);
    border-right: 1px solid rgba(87, 76, 67, 0.12);
    border-bottom: 1px solid rgba(87, 76, 67, 0.12);
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-headline);
    font-weight: 800;
    font-size: clamp(0.72rem, 0.75vw + 0.45rem, 1.1rem);
    color: var(--color-on-surface);
}

.sudoku-cell.box-right {
    border-right-width: 3px;
    border-right-color: rgba(87, 76, 67, 0.28);
}

.sudoku-cell.box-bottom {
    border-bottom-width: 3px;
    border-bottom-color: rgba(87, 76, 67, 0.28);
}