/* Kakuro */

.kk-stage {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.8rem;
    user-select: none;
}

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

.kk-board {
    --kk-size: 7;
    --kk-cell: min(calc(92vw / var(--kk-size)), 54px);
    display: grid;
    grid-template-columns: repeat(var(--kk-size), var(--kk-cell));
    gap: 1px;
    background: #33333c;
    border: 2px solid #33333c;
    border-radius: 4px;
}

.kk-cell {
    width: var(--kk-cell);
    height: var(--kk-cell);
    border: none;
    padding: 0;
    font-size: calc(var(--kk-cell) * 0.5);
    font-weight: 700;
    font-variant-numeric: tabular-nums;
    display: flex;
    align-items: center;
    justify-content: center;
    -webkit-tap-highlight-color: transparent;
}

.kk-cell.white {
    background: var(--color-card-bg);
    color: var(--cat-speed);
    cursor: pointer;
}

.kk-cell.white.selected {
    background: var(--color-primary);
    box-shadow: inset 0 0 0 3px var(--color-primary-dark);
}

/* Check marks runs that cannot work yet, without giving the answer away. */
.kk-cell.white.bad {
    background: #ffe3e3;
    color: var(--color-accent);
}

.kk-cell.block {
    background: #4a4a55;
    position: relative;
}

/* The clue cell is split by a diagonal: sum going down below it, sum going
   right above it. Drawn with a gradient so no extra markup is needed. */
.kk-cell.clue {
    background: linear-gradient(to bottom right,
        #4a4a55 0 calc(50% - 1px), #9a9aa8 calc(50% - 1px) calc(50% + 1px), #3c3c46 calc(50% + 1px) 100%);
}

.kk-down,
.kk-right {
    position: absolute;
    font-size: clamp(10px, calc(var(--kk-cell) * 0.32), 18px);
    font-weight: 700;
    color: #fff;
    line-height: 1;
}

.kk-down { left: 12%; bottom: 12%; }
.kk-right { right: 12%; top: 12%; }

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

.kk-pad {
    display: grid;
    grid-template-columns: repeat(9, 1fr);
    gap: 4px;
    width: min(380px, 92vw);
}

.kk-num {
    aspect-ratio: 1;
    border: none;
    border-radius: var(--radius-sm);
    background: var(--color-primary);
    color: var(--color-text);
    font-size: clamp(0.9rem, 3.4vw, 1.15rem);
    font-weight: 700;
    cursor: pointer;
    -webkit-tap-highlight-color: transparent;
}

.kk-num:hover { background: var(--color-primary-dark); }

.kk-actions {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
    justify-content: center;
}

.kk-btn {
    padding: 0.55rem 1.2rem;
    font-size: 0.95rem;
    font-weight: 600;
    border: 2px solid var(--color-border);
    border-radius: var(--radius-md);
    background: var(--color-card-bg);
    color: var(--color-text);
    cursor: pointer;
    -webkit-tap-highlight-color: transparent;
}

.kk-btn:hover { border-color: var(--color-primary-dark); }

.kk-sizes {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
    justify-content: center;
}

.kk-size {
    padding: 0.45rem 1rem;
    font-size: 0.95rem;
    font-weight: 600;
    border: 2px solid var(--color-border);
    border-radius: var(--radius-md);
    background: var(--color-card-bg);
    color: var(--color-text);
    cursor: pointer;
}

.kk-size:hover { border-color: var(--color-primary-dark); }

.kk-size.active {
    background: var(--color-primary);
    border-color: var(--color-primary-dark);
}

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

.kk-num:focus-visible,
.kk-btn:focus-visible {
    outline: 3px solid var(--color-text);
    outline-offset: 2px;
}

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