main {
    padding: 5rem 1rem;
    height: auto;
    min-height: 20rem;
}

@media (max-width: 640px) {
    main {
        padding: 3rem 1rem 4rem 1rem;
    }
}

.btn {
    background-color: #f9f5f5;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.45rem;
    font-size: 0.9rem;
    font-weight: 500;
    letter-spacing: 0.06em;
    color: #333;
    padding: 1rem;
    border-radius: 0.5rem;
    margin-top: 2rem;
    transition: background 0.2s ease, color 0.2s ease;
}

.btn:hover { 
    background-color: #f02004;
    color: #fff;
}

.btn svg {
    width: 1.3em;
    height: 1.3em;
    flex-shrink: 0;
}

/* =====================================================
   Placeholder HTML/CSS — mantiene tamaño del contenedor fijo
   aunque cambie el tamaño del texto interno
   ===================================================== */
.product .image .img-placeholder {
    width: 100%;
    height: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 0.35rem;
    background-color: #f9f5f5;
    text-align: center;
    padding: 1rem;
    box-sizing: border-box;
    flex-shrink: 0;
}

.product .image .img-placeholder .ph-label {
    font-family: 'Roboto', sans-serif;
    font-size: 1.25rem;
    font-weight: 400;
    color: #b3b3b3;
    line-height: 1.2;
}

.product .image .img-placeholder .ph-sku {
    font-family: 'Roboto', sans-serif;
    font-size: 1.25rem;
    font-weight: 600;
    color: #808080;
    line-height: 1.2;
    word-break: break-all;
}