#cart-toast {
    position: fixed; bottom: 24px; right: 24px; background: #1a1a1a; color: #fff;
    padding: 12px 20px; border-radius: 8px; font-size: 14px; opacity: 0; transform: translateY(12px);
    transition: opacity .25s, transform .25s; pointer-events: none; z-index: 9999; max-width: 90vw;
}
#cart-toast.is-visible { opacity: 1; transform: translateY(0); }
#cart-toast.cart-toast--error { background: #b91c1c; }

.qv-overlay {
    position: fixed; inset: 0; background: rgba(0,0,0,.55); z-index: 9998;
    display: flex; align-items: center; justify-content: center; padding: 16px;
}
.qv-overlay[hidden] { display: none; }
.qv-box {
    background: #fff; color: #111; max-width: 760px; width: 100%; max-height: 90vh;
    overflow-y: auto; border-radius: 10px; position: relative; padding: 28px;
}
.qv-close {
    position: absolute; top: 12px; right: 16px; font-size: 24px; background: none;
    border: none; cursor: pointer; line-height: 1;
}
.qv-loading { text-align: center; padding: 40px 0; color: #777; }
@media (min-width: 640px) { .qv-content { display: grid; grid-template-columns: 300px 1fr; gap: 24px; } }
.qv-main-img {
    width: 100%; padding-top: 100%; background-size: cover; background-position: center;
    border-radius: 8px; background-color: #f2f2f2;
}
.qv-thumbs { display: flex; gap: 8px; margin-top: 8px; }
.qv-thumb {
    width: 52px; height: 52px; background-size: cover; background-position: center;
    border-radius: 6px; cursor: pointer; border: 1px solid #ddd;
}
.qv-cat { font-size: 12px; text-transform: uppercase; color: #888; letter-spacing: .04em; }
.qv-name { margin: 6px 0 10px; font-size: 20px; }
.qv-price { font-size: 18px; margin-bottom: 12px; }
.qv-desc { color: #555; font-size: 14px; margin-bottom: 16px; }
.qv-variant-wrap, .qv-qty-wrap { margin-bottom: 14px; }
.qv-variant-wrap label, .qv-qty-wrap label { display: block; font-size: 12px; margin-bottom: 4px; color: #777; }
.qv-variant-wrap select, .qv-qty-wrap input { width: 100%; padding: 8px 10px; border: 1px solid #ccc; }
.qv-detail-link { display: inline-block; margin-top: 14px; font-size: 13px; }
@media (max-width: 639px) { .qv-box { max-height: 100vh; height: 100%; border-radius: 0; } }