.paint-calculator {
    margin: 28px 0;
    padding: clamp(16px, 3vw, 28px);
    border: 1px solid #787878;
    border-radius: 12px;
    background: #fff;
    color: #1e1e1e;
    scroll-margin-top: 150px;
}
.paint-calculator h3 { margin-top: 0; }
.paint-calculator__grid { display: grid; gap: 16px; }
.paint-calculator label { display: block; margin-bottom: 6px; font-weight: 600; }
.com-content-article.item-page .paint-calculator input,
.com-content-article.item-page .paint-calculator select {
    display: block;
    width: 100%;
    min-width: 0;
    min-height: 48px;
    box-sizing: border-box;
    border: 1px solid #787878;
    border-radius: 4px;
    padding: 10px 12px;
    background: #fff;
    color: #1e1e1e;
    font: inherit;
    font-size: 16px;
}
.paint-calculator__product { margin-bottom: 18px; }
.paint-calculator .paint-calculator__button {
    margin-top: 18px;
    min-height: 48px;
    border: 0;
    border-radius: 5px;
    padding: 12px 24px;
    background: #a80d13;
    color: #fff;
    font: inherit;
    cursor: pointer;
}
.com-content-article.item-page .paint-calculator :is(input, select, button, a):focus-visible {
    outline: 2px solid #1e1e1e;
    outline-offset: 3px;
}
.com-content-article.item-page .paint-calculator [aria-invalid="true"] { border-color: #a80d13; }
.paint-calculator__result { display: block; min-height: 3em; margin-top: 16px; font-weight: 600; }
.paint-calculator__error { color: #a80d13; }
.paint-calculator__note { font-size: 14px; line-height: 1.5; }
@media (min-width: 640px) {
    .paint-calculator__grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}