/* =================================================================
   tools/bit-mask-builder.css
   Auto-extracted from math.css (2026-05-11).
   Loaded via config/js-manifest.php → templates/partials/head-styles.php.
   ================================================================= */

/* ─── Bit Mask Grid ───────────────────────────────────── */
.math-bit-mask-grid {
    display: flex;
    gap: 4px;
    flex-wrap: wrap;
    justify-content: center;
}

.math-bit-mask-cell {
    width: 40px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 2px;
    padding: 6px 0 8px;
    border: 2px solid var(--math-border);
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.2s ease;
    user-select: none;
    background: var(--math-surface);
}

.math-bit-mask-cell:hover {
    border-color: var(--math-primary);
    background: var(--math-primary-soft);
}

.math-bit-mask-cell.active {
    border-color: var(--math-primary);
    background: var(--math-primary);
    color: #fff;
}

.math-bit-mask-cell.active .math-bit-mask-label {
    color: rgba(255, 255, 255, 0.7);
}

.math-bit-mask-cell.active .math-bit-mask-val {
    color: #fff;
}

.math-bit-mask-label {
    font-size: 9px;
    font-weight: 600;
    color: var(--math-text-muted);
    font-family: 'SF Mono', monospace;
}

.math-bit-mask-val {
    font-size: 16px;
    font-weight: 700;
    font-family: 'SF Mono', 'Fira Code', 'Consolas', monospace;
    color: var(--math-text);
}

/* ─── Bit Mask Result Visual ──────────────────────────── */
.math-bitmask-viz {
    margin: 14px 0 12px;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
}

.math-bitmask-viz-row {
    display: flex;
    gap: 4px;
    justify-content: center;
    flex-wrap: nowrap;
    min-width: max-content;
    padding: 2px 2px 6px;
}

.math-bitmask-viz-cell {
    position: relative;
    flex: 0 0 auto;
    width: 34px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
    padding: 8px 0 6px;
    border: 1.5px solid var(--math-border);
    border-radius: 8px;
    background: var(--math-surface);
    transition: all 0.18s ease;
}

.math-bitmask-viz-cell.is-on {
    border-color: var(--math-primary);
    background: color-mix(in srgb, var(--math-primary) 10%, var(--math-surface));
}

.math-bitmask-viz-cell.is-emph {
    border-color: var(--math-primary);
    background: var(--math-primary);
    box-shadow: 0 2px 8px color-mix(in srgb, var(--math-primary) 35%, transparent);
}

.math-bitmask-viz-cell.is-emph .math-bitmask-viz-bit,
.math-bitmask-viz-cell.is-emph .math-bitmask-viz-pos {
    color: #fff;
}

.math-bitmask-viz-cell.is-dim {
    opacity: 0.45;
}

.math-bitmask-viz-cell.has-nibble-break {
    margin-right: 10px;
}

.math-bitmask-viz-bit {
    font-family: 'SF Mono', 'Fira Code', 'Consolas', monospace;
    font-size: 15px;
    font-weight: 700;
    color: var(--math-text);
    line-height: 1;
}

.math-bitmask-viz-cell.is-on:not(.is-emph) .math-bitmask-viz-bit {
    color: var(--math-primary);
}

.math-bitmask-viz-pos {
    font-family: 'SF Mono', monospace;
    font-size: 9px;
    font-weight: 600;
    color: var(--math-text-muted);
    line-height: 1;
}

.math-bitmask-summary {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
    justify-content: center;
    margin-top: 6px;
}

.math-bitmask-chip {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 6px 10px;
    border: 1px solid var(--math-border);
    border-radius: 999px;
    background: var(--math-surface-alt, var(--math-surface));
    font-size: 12px;
}

.math-bitmask-chip-key {
    color: var(--math-text-muted);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    font-size: 10px;
}

.math-bitmask-chip-val {
    color: var(--math-text);
    font-weight: 700;
}

.math-bitmask-chip-val--mono {
    font-family: 'SF Mono', 'Fira Code', 'Consolas', monospace;
}

.math-bitmask-combined {
    margin-top: 18px;
    padding-top: 16px;
    border-top: 1px solid var(--math-border-light);
}

.math-bitmask-op-viz {
    margin: 12px 0;
    padding: 12px 10px;
    border: 1px solid var(--math-border-light);
    border-radius: 10px;
    background: var(--math-surface-alt, var(--math-surface));
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
}

.math-bitmask-op-row {
    display: flex;
    align-items: center;
    gap: 14px;
    min-width: max-content;
}

.math-bitmask-op-row + .math-bitmask-op-row {
    margin-top: 4px;
}

.math-bitmask-op-label {
    flex: 0 0 auto;
    min-width: 68px;
    display: flex;
    flex-direction: column;
    gap: 2px;
    text-align: right;
}

.math-bitmask-op-label-main {
    font-size: 11px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: var(--math-text-soft);
}

.math-bitmask-op-label-sub {
    font-family: 'SF Mono', monospace;
    font-size: 12px;
    color: var(--math-text-muted);
    font-weight: 600;
}

.math-bitmask-op-sign {
    font-family: 'SF Mono', monospace;
    font-size: 14px;
    font-weight: 800;
    color: var(--math-primary);
    text-align: center;
    margin: 6px 0 6px 82px;
    letter-spacing: 0.12em;
    text-transform: uppercase;
}

.math-bitmask-op-divider {
    height: 2px;
    background: linear-gradient(to right, transparent, var(--math-border) 10%, var(--math-border) 90%, transparent);
    margin: 8px 0 6px 82px;
}

.math-bitmask-op-hint {
    margin-top: 10px;
    padding: 10px 12px;
    border-radius: 8px;
    background: var(--math-primary-soft);
    color: var(--math-text);
    font-size: 12.5px;
    line-height: 1.5;
}

.math-bitmask-op-hint b {
    color: var(--math-primary);
    font-weight: 700;
}

@media (max-width: 640px) {
    .math-bitmask-viz-cell {
        width: 30px;
        padding: 6px 0 5px;
    }

    .math-bitmask-viz-bit {
        font-size: 13px;
    }

    .math-bitmask-viz-pos {
        font-size: 8px;
    }

    .math-bitmask-viz-cell.has-nibble-break {
        margin-right: 8px;
    }

    .math-bitmask-op-row {
        gap: 10px;
    }

    .math-bitmask-op-label {
        min-width: 54px;
    }

    .math-bitmask-op-label-main {
        font-size: 10px;
    }

    .math-bitmask-op-label-sub {
        font-size: 11px;
    }

    .math-bitmask-op-sign {
        margin-left: 64px;
    }

    .math-bitmask-op-divider {
        margin-left: 64px;
    }
}