.nn-header {
    text-align: center;
    margin: 1.5rem 0 2rem;
}

.nn-header h2 {
    font-size: 1.8rem;
    font-weight: 700;
    margin: 0 0 0.3rem;
    color: var(--font-color);
}

.nn-header p {
    color: #999;
    margin: 0;
    font-size: var(--text-sm);
}

.nn-digit-layout {
    display: flex;
    gap: 2rem;
    align-items: flex-start;
    justify-content: center;
}

.nn-draw-area {
    flex-shrink: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
}

#drawCanvas {
    border: 1px solid var(--border-color);
    border-radius: 10px;
    display: block;
    width: 280px;
    height: 280px;
    touch-action: none;
    cursor: crosshair;
}

.nn-draw-toolbar {
    display: flex;
    gap: 8px;
}

.nn-preview-row {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: var(--text-sm);
    color: #999;
}

#previewCanvas {
    border: 1px solid var(--border-color);
    border-radius: 4px;
    display: block;
    width: 84px;
    height: 84px;
}

.nn-results-area {
    width: 260px;
    flex-shrink: 0;
}

.nn-prediction-header {
    font-weight: 600;
    font-size: var(--text-sm);
    color: var(--font-color);
    margin-bottom: 8px;
}

#predictionBars {
    margin-bottom: 10px;
}

.nn-bar-row {
    display: flex;
    align-items: center;
    gap: 6px;
    margin-bottom: 3px;
    padding: 2px 4px;
    border-radius: 4px;
    transition: background 0.15s;
}

.nn-bar-active {
    background: rgba(32, 178, 170, 0.08);
}

.nn-bar-label {
    width: 14px;
    font-size: 12px;
    font-weight: 600;
    color: var(--font-color);
    text-align: right;
}

.nn-bar-track {
    flex: 1;
    height: 14px;
    background: var(--card-bg);
    border-radius: 7px;
    overflow: hidden;
}

.nn-bar-fill {
    display: block;
    height: 100%;
    border-radius: 7px;
    transition: width 0.1s ease;
    min-width: 2px;
}

.nn-bar-pct {
    width: 36px;
    font-size: 11px;
    color: #999;
    text-align: right;
}

#predictionResult {
    font-size: var(--text-md);
    color: var(--font-color);
    margin-bottom: 1rem;
    padding: 8px 12px;
    background: var(--card-bg);
    border-radius: 8px;
    text-align: center;
}

#predictionResult strong {
    font-size: 1.3em;
    color: var(--accent-color);
}

.nn-btn {
    padding: 7px 18px;
    border-radius: 6px;
    font-size: var(--text-sm);
    font-family: inherit;
    font-weight: 500;
    cursor: pointer;
    border: 1px solid var(--border-color);
    transition: background 0.15s, color 0.15s;
}

.nn-btn-primary {
    background: var(--accent-color);
    color: #fff;
    border-color: var(--accent-color);
}

.nn-btn-primary:hover {
    background: var(--accent-hover);
}

@media (max-width: 700px) {
    .nn-digit-layout {
        flex-direction: column;
        align-items: center;
    }

    .nn-results-area {
        width: 100%;
        max-width: 360px;
    }

    #drawCanvas {
        width: 260px;
        height: 260px;
    }
}