.shop-kits {
    margin-bottom: 28px;
}

.project-detail-grid {
    display: grid;
    grid-template-columns: minmax(0, 0.95fr) minmax(0, 1.05fr);
    column-gap: 36px;
    row-gap: 28px;
    align-items: start;
}

.project-detail-grid > .kit-builder,
.project-detail-grid > .loose-items,
.project-detail-grid > .back-link {
    grid-column: 1 / -1;
}

/* ── Galeria ── */
.project-gallery-thumbs {
    display: flex;
    gap: 8px;
    margin-top: 10px;
    overflow-x: auto;
    padding-bottom: 2px;
}

.project-thumb {
    position: relative;
    flex: 0 0 auto;
    width: 64px;
    height: 64px;
    border: 2px solid transparent;
    border-radius: 8px;
    overflow: hidden;
    padding: 0;
    background: var(--soft-color);
    cursor: pointer;
}

.project-thumb img {
    width: 100%;
    height: 100%;
    display: block;
    object-fit: cover;
}

.project-thumb.active {
    border-color: var(--primary-color);
}

/* ── Informações ── */
.project-title {
    margin: 0;
    color: var(--primary-dark);
    font-size: clamp(1.8rem, 4vw, 2.6rem);
    line-height: 1.1;
}

.project-summary {
    margin: 0;
    color: var(--muted-color);
    font-size: 1.05rem;
    line-height: 1.55;
}

.project-details-text {
    margin: 0;
    color: var(--muted-color);
    line-height: 1.5;
}

/* ── Montador de kit ── */
.kit-builder {
    padding: 20px;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    background: #ffffff;
    box-shadow: 0 12px 28px rgba(31, 41, 51, 0.06);
}

.kit-builder h2 {
    margin: 0 0 14px;
    color: var(--primary-dark);
    font-size: 1.4rem;
}

.kit-options {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 12px;
    margin-bottom: 18px;
}

.kit-option {
    display: flex;
    flex-direction: column;
    gap: 4px;
    padding: 14px;
    border: 2px solid var(--border-color);
    border-radius: 8px;
    background: #ffffff;
    text-align: left;
    font: inherit;
    cursor: pointer;
    transition: border-color 0.15s ease, background 0.15s ease;
}

.kit-option:hover {
    border-color: var(--primary-color);
}

.kit-option.active {
    border-color: var(--primary-color);
    background: var(--soft-color);
}

.kit-option-name {
    color: var(--primary-dark);
    font-weight: 900;
    font-size: 1.05rem;
}

.kit-option-price {
    color: var(--primary-color);
    font-weight: 900;
}

.kit-option-desc {
    color: var(--muted-color);
    font-size: 0.86rem;
    line-height: 1.4;
}

.escolha-group {
    padding: 16px 0;
    border-top: 1px solid var(--border-color);
}

.escolha-group:first-child {
    padding-top: 0;
    border-top: none;
}

.escolha-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    margin-bottom: 10px;
}

.escolha-header h3 {
    margin: 0;
    color: var(--primary-dark);
    font-size: 1.05rem;
}

.escolha-progress {
    padding: 4px 10px;
    border-radius: 999px;
    background: var(--soft-color);
    color: var(--primary-color);
    font-size: 0.82rem;
    font-weight: 900;
    white-space: nowrap;
}

.escolha-desc {
    margin: 0 0 10px;
    color: var(--muted-color);
    font-size: 0.9rem;
}

.escolha-items {
    display: grid;
    gap: 10px;
}

.escolha-item {
    display: grid;
    grid-template-columns: 52px minmax(0, 1fr) auto;
    align-items: center;
    gap: 12px;
    padding: 8px;
    border: 1px solid var(--border-color);
    border-radius: 8px;
}

.escolha-item-media {
    position: relative;
    width: 52px;
    height: 52px;
    border-radius: 6px;
    overflow: hidden;
    background: var(--soft-color);
}

.escolha-item-media img {
    width: 100%;
    height: 100%;
    display: block;
    object-fit: cover;
}

.escolha-item-media img.is-missing {
    display: none;
}

.escolha-item-media .product-image-fallback {
    position: absolute;
    inset: 0;
    display: none;
    place-items: center;
    color: var(--primary-color);
    font-size: 1.1rem;
}

.escolha-item-media img.is-missing + .product-image-fallback {
    display: grid;
}

.escolha-item-info {
    display: flex;
    flex-direction: column;
    gap: 2px;
    min-width: 0;
}

.escolha-item-info strong {
    color: var(--primary-dark);
    font-size: 0.95rem;
}

.escolha-item-obs {
    color: var(--muted-color);
    font-size: 0.78rem;
}

.escolha-item-stepper button:disabled {
    opacity: 0.4;
    cursor: not-allowed;
}

.variation-options {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.variation-option {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 12px;
    border: 2px solid var(--border-color);
    border-radius: 8px;
    color: var(--primary-dark);
    font-size: 0.9rem;
    font-weight: 700;
    cursor: pointer;
    transition: border-color 0.15s ease, background 0.15s ease;
}

.variation-option input {
    margin: 0;
}

.variation-option.active {
    border-color: var(--primary-color);
    background: var(--soft-color);
}

.kit-inclusos {
    margin: 14px 0 0;
    padding: 10px 12px;
    border-radius: 8px;
    background: var(--soft-color);
    color: var(--primary-dark);
    font-size: 0.88rem;
    font-weight: 700;
}

.kit-inclusos i {
    margin-right: 6px;
    color: var(--primary-color);
}

.kit-summary {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: 14px;
    margin-top: 20px;
    padding-top: 16px;
    border-top: 1px solid var(--border-color);
}

.kit-summary-progress {
    color: var(--muted-color);
    font-weight: 900;
}

.kit-summary-actions {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 12px;
}

.kit-summary-price {
    color: var(--primary-dark);
    font-size: 1.4rem;
    font-weight: 900;
}

.kit-summary-actions .btn {
    min-width: 200px;
}

.kit-summary-actions .btn.is-disabled,
.kit-summary-actions a.is-disabled {
    opacity: 0.5;
    pointer-events: none;
}

/* ── Itens avulsos ── */
.loose-items h2 {
    margin: 0 0 14px;
    color: var(--primary-dark);
    font-size: 1.4rem;
}

.loose-items-grid {
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
}

.loose-items-grid .product-footer {
    flex-direction: column;
    align-items: stretch;
}

.loose-items-grid .product-footer .btn {
    min-width: 0;
    width: 100%;
}

.back-link {
    margin-top: 4px;
}

@media (max-width: 820px) {
    .project-detail-grid {
        grid-template-columns: 1fr;
        row-gap: 20px;
    }
}

@media (max-width: 620px) {
    .kit-builder {
        padding: 14px;
    }

    .kit-summary {
        flex-direction: column;
        align-items: stretch;
    }

    .kit-summary-actions {
        flex-direction: column;
        align-items: stretch;
    }

    .kit-summary-actions .btn {
        min-width: 0;
    }

    .escolha-item {
        grid-template-columns: 44px minmax(0, 1fr);
    }

    .escolha-item-stepper {
        grid-column: 1 / -1;
        justify-content: flex-end;
    }
}