:root {
    --po-primary: #2563eb;
    --po-primary-hover: #1d4ed8;
    --po-bg: #ffffff;
    --po-text: #1f2937;
    --po-text-light: #6b7280;
    --po-border: #e5e7eb;
    --po-radius: 12px;
    --po-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --po-font: 'Inter', system-ui, -apple-system, sans-serif;
}

.product-optimizer {
    font-family: var(--po-font);
    max-width: 800px;
    margin: 2rem auto;
    background: var(--po-bg);
    padding: 2.5rem;
    border-radius: var(--po-radius);
    box-shadow: var(--po-shadow);
    border: 1px solid var(--po-border);
}

.product-optimizer__header {
    margin-bottom: 2rem;
    text-align: center;
}

.product-optimizer__title {
    font-size: 1.875rem;
    font-weight: 700;
    color: var(--po-text);
    margin: 0 0 0.5rem 0;
}

.product-optimizer__description {
    color: var(--po-text-light);
    font-size: 1.1rem;
    margin: 0;
}

.product-optimizer__group {
    margin-bottom: 1.5rem;
}

.product-optimizer__row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
}

@media (max-width: 640px) {
    .product-optimizer__row {
        grid-template-columns: 1fr;
    }
}

.product-optimizer__label {
    display: block;
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: var(--po-text);
}

.product-optimizer__required {
    color: #ef4444;
}

.product-optimizer__input,
.product-optimizer__select,
.product-optimizer__textarea {
    width: 100%;
    padding: 0.75rem 1rem;
    border: 1px solid var(--po-border);
    border-radius: 8px;
    font-size: 1rem;
    transition: all 0.2s ease;
    background: #f9fafb;
}

.product-optimizer__input:focus,
.product-optimizer__select:focus,
.product-optimizer__textarea:focus {
    outline: none;
    border-color: var(--po-primary);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
    background: #fff;
}

.product-optimizer__hint {
    display: block;
    margin-top: 0.25rem;
    color: var(--po-text-light);
    font-size: 0.875rem;
}

.product-optimizer__button {
    width: 100%;
    padding: 1rem;
    background: var(--po-primary);
    color: white;
    border: none;
    border-radius: 8px;
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    transition: background 0.2s;
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 0.5rem;
}

.product-optimizer__button:hover {
    background: var(--po-primary-hover);
}

.product-optimizer__button:disabled {
    opacity: 0.7;
    cursor: not-allowed;
}

.product-optimizer__loader {
    width: 20px;
    height: 20px;
    border: 3px solid rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    border-top-color: #fff;
    animation: spin 1s ease-in-out infinite;
}

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}

.product-optimizer__result {
    margin-top: 2rem;
    border-top: 1px solid var(--po-border);
    padding-top: 2rem;
    animation: slideDown 0.3s ease-out;
}

@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.product-optimizer__result-title {
    font-size: 1.25rem;
    margin-bottom: 1rem;
    color: var(--po-text);
}

.product-optimizer__result-content {
    background: #f3f4f6;
    padding: 1.5rem;
    border-radius: 8px;
    white-space: pre-wrap;
    line-height: 1.6;
    color: var(--po-text);
    border: 1px solid var(--po-border);
}

.product-optimizer__button--secondary {
    margin-top: 1rem;
    padding: 0.5rem 1rem;
    background: transparent;
    border: 1px solid var(--po-border);
    color: var(--po-text);
    border-radius: 6px;
    cursor: pointer;
    font-size: 0.9rem;
    transition: all 0.2s;
    display: inline-block;
    width: auto;
}

.product-optimizer__button--secondary:hover {
    background: #f3f4f6;
    border-color: #d1d5db;
}

.product-optimizer__error {
    margin-top: 1.5rem;
    padding: 1rem;
    background: #fef2f2;
    border: 1px solid #fee2e2;
    color: #b91c1c;
    border-radius: 8px;
    text-align: center;
}

.product-optimizer__meta {
    font-size: 0.75rem;
    color: var(--po-text-light);
    margin-top: 0.25rem;
    height: 1.2em;
}