/* ============================================================
   ShifaStore Single Product Page
   ============================================================ */

.single-product-main {
    padding-top: 8rem;
    max-width: 1280px;
    margin: 0 auto;
    padding-left: 1.5rem;
    padding-right: 1.5rem;
    padding-bottom: 6rem;
}

/* ---------- Product summary layout ---------- */
.product-summary-wrap {
    display: grid;
    gap: 2.5rem;
    margin-bottom: 3rem;
}
@media (min-width: 768px) {
    .product-summary-wrap { grid-template-columns: 1fr 1fr; align-items: start; }
}

/* ---------- Gallery ---------- */
.product-gallery { display: flex; flex-direction: column; gap: 1rem; }
.gallery-main {
    position: relative;
    aspect-ratio: 1 / 1;
    border-radius: var(--radius-2xl);
    overflow: hidden;
    background: var(--color-surface-container-low);
}
.gallery-main img { width: 100%; height: 100%; object-fit: cover; }
.gallery-badge {
    position: absolute; top: 1rem; left: 1rem;
}
.gallery-wishlist {
    position: absolute; top: 1rem; right: 1rem;
    width: 2.5rem; height: 2.5rem;
    display: inline-flex; align-items: center; justify-content: center;
    border-radius: var(--radius-full);
    background: rgba(255,255,255,0.9); border: none; cursor: pointer;
    color: var(--color-on-surface-variant);
    transition: color 0.15s;
}
.gallery-wishlist:hover { color: var(--color-error); }
.gallery-thumbs { display: flex; gap: 0.75rem; flex-wrap: wrap; }
.gallery-thumb {
    width: 4.5rem; height: 4.5rem;
    border-radius: var(--radius-md);
    overflow: hidden;
    border: 2px solid transparent;
    cursor: pointer;
    transition: border-color 0.15s;
    background: var(--color-surface-container-low);
}
.gallery-thumb img { width: 100%; height: 100%; object-fit: cover; }
.gallery-thumb.is-active { border-color: var(--color-primary); }
.gallery-thumb:hover { border-color: var(--color-outline-variant); }

/* ---------- Buy box ---------- */
.buy-box { display: flex; flex-direction: column; gap: 1.25rem; }
.buy-box__brand {
    font-size: 0.75rem; font-weight: 700; text-transform: uppercase;
    letter-spacing: 0.15em; color: var(--color-on-surface-variant);
}
.buy-box__title {
    font-size: clamp(1.5rem, 3vw, 2rem);
    font-weight: 700; line-height: 1.2; margin: 0;
}
.buy-box__rating {
    display: flex; align-items: center; gap: 0.5rem; flex-wrap: wrap;
}
.rating-stars-lg { display: flex; gap: 0.125rem; color: var(--color-tertiary); }
.rating-stars-lg span { font-size: 1.25rem; }
.buy-box__rating-val { font-weight: 700; }
.buy-box__rating-count { color: var(--color-on-surface-variant); font-size: 0.875rem; }
.buy-box__rating-sep { color: var(--color-outline-variant); }
.buy-box__reviews-link { color: var(--color-primary); font-size: 0.875rem; font-weight: 600; text-decoration: none; }
.buy-box__reviews-link:hover { text-decoration: underline; }

.buy-box__price { display: flex; align-items: baseline; gap: 0.75rem; flex-wrap: wrap; }
.buy-box__price-current { font-size: 2rem; font-weight: 800; color: var(--color-primary); line-height: 1; }
.buy-box__price-original { font-size: 1.125rem; text-decoration: line-through; color: var(--color-on-surface-variant); }
.buy-box__discount-pill {
    background: var(--color-tertiary-fixed); color: var(--color-on-tertiary-fixed);
    border-radius: var(--radius-full); padding: 0.25rem 0.625rem;
    font-size: 0.75rem; font-weight: 700;
}

/* Size selector */
.buy-box__sizes { display: flex; flex-direction: column; gap: 0.5rem; }
.buy-box__sizes-label { font-size: 0.8125rem; font-weight: 600; }
.size-options { display: flex; gap: 0.5rem; flex-wrap: wrap; }
.size-btn {
    padding: 0.5rem 1rem;
    border-radius: var(--radius-full);
    border: 1.5px solid var(--color-outline-variant);
    background: #fff;
    font-size: 0.875rem; font-weight: 600;
    font-family: var(--font-body);
    cursor: pointer; transition: all 0.15s;
}
.size-btn:hover { border-color: var(--color-primary); color: var(--color-primary); }
.size-btn.is-active { background: var(--color-primary); color: #fff; border-color: var(--color-primary); }

/* Quantity stepper */
.buy-box__qty { display: flex; flex-direction: column; gap: 0.5rem; }
.buy-box__qty-label { font-size: 0.8125rem; font-weight: 600; }
.qty-stepper {
    display: inline-flex; align-items: center;
    background: var(--color-surface-container-low);
    border-radius: var(--radius-full);
    overflow: hidden; width: fit-content;
}
.qty-btn {
    width: 2.5rem; height: 2.5rem;
    display: inline-flex; align-items: center; justify-content: center;
    background: none; border: none; cursor: pointer;
    font-size: 1.25rem; color: var(--color-primary);
    transition: background 0.15s;
}
.qty-btn:hover { background: var(--color-surface-container); }
.qty-input {
    width: 3rem; text-align: center;
    background: none; border: none;
    font-size: 1rem; font-weight: 700;
    font-family: var(--font-body); outline: none;
    -moz-appearance: textfield;
}
.qty-input::-webkit-outer-spin-button,
.qty-input::-webkit-inner-spin-button { -webkit-appearance: none; }

/* CTA row */
.buy-box__cta { display: flex; flex-direction: column; gap: 0.75rem; }
@media (min-width: 480px) { .buy-box__cta { flex-direction: row; } }
.btn-add-to-cart-lg {
    flex: 1;
    display: inline-flex; align-items: center; justify-content: center; gap: 0.5rem;
    background: linear-gradient(135deg, #0A6439 0%, #2E7D50 100%);
    color: #fff; border: none; border-radius: var(--radius-full);
    padding: 0.875rem 1.5rem;
    font-size: 1rem; font-weight: 700; font-family: var(--font-body);
    cursor: pointer; transition: box-shadow 0.2s;
}
.btn-add-to-cart-lg:hover { box-shadow: 0 4px 16px rgba(10,100,57,0.3); }
.btn-buy-now {
    flex: 1;
    display: inline-flex; align-items: center; justify-content: center;
    background: var(--color-surface-container-low);
    color: var(--color-on-surface); border: 1.5px solid var(--color-outline-variant);
    border-radius: var(--radius-full);
    padding: 0.875rem 1.5rem;
    font-size: 1rem; font-weight: 700; font-family: var(--font-body);
    cursor: pointer; transition: all 0.15s; text-decoration: none;
}
.btn-buy-now:hover { border-color: var(--color-primary); color: var(--color-primary); }

/* Trust mini-cards */
.buy-box__trust {
    display: grid; grid-template-columns: repeat(2, 1fr); gap: 0.75rem;
}
.trust-mini {
    display: flex; align-items: center; gap: 0.5rem;
    background: var(--color-surface-container-low);
    border-radius: var(--radius-lg);
    padding: 0.75rem;
    font-size: 0.8125rem;
}
.trust-mini-icon { font-size: 1.25rem; color: var(--color-primary); flex-shrink: 0; }
.trust-mini-text { font-weight: 600; line-height: 1.3; }

/* ---------- Benefits strip ---------- */
.product-benefits {
    background: var(--color-surface-container-low);
    border-radius: var(--radius-2xl);
    padding: 1.5rem 2rem;
    display: grid;
    gap: 1.25rem;
    margin-bottom: 2.5rem;
}
@media (min-width: 640px) { .product-benefits { grid-template-columns: repeat(3, 1fr); } }
.benefit-item { display: flex; align-items: center; gap: 0.75rem; }
.benefit-icon { font-size: 1.5rem; color: var(--color-primary); flex-shrink: 0; }
.benefit-text { font-size: 0.875rem; font-weight: 600; line-height: 1.3; }

/* ---------- Tabs ---------- */
.product-tabs { margin-bottom: 2.5rem; }
.tab-nav {
    display: flex; gap: 0; overflow-x: auto; scrollbar-width: none;
    border-bottom: 1px solid var(--color-outline-variant);
    margin-bottom: 1.5rem;
}
.tab-nav::-webkit-scrollbar { display: none; }
.tab-btn {
    padding: 0.75rem 1.25rem;
    font-size: 0.875rem; font-weight: 600;
    font-family: var(--font-headline);
    background: none; border: none; cursor: pointer;
    color: var(--color-on-surface-variant);
    border-bottom: 2px solid transparent;
    margin-bottom: -1px; white-space: nowrap;
    transition: color 0.15s, border-color 0.15s;
}
.tab-btn.is-active { color: var(--color-primary); border-bottom-color: var(--color-primary); }
.tab-btn:hover:not(.is-active) { color: var(--color-on-surface); }
.tab-pane { display: none; }
.tab-pane.is-active { display: block; }
.tab-pane p { line-height: 1.8; color: var(--color-on-surface-variant); margin-bottom: 1rem; }
.tab-pane ul { padding-left: 1.25rem; color: var(--color-on-surface-variant); line-height: 1.8; }
.specs-table { width: 100%; border-collapse: collapse; }
.specs-table tr { border-bottom: 1px solid var(--color-outline-variant); }
.specs-table tr:last-child { border-bottom: none; }
.specs-table td { padding: 0.75rem 0; font-size: 0.875rem; }
.specs-table td:first-child { color: var(--color-on-surface-variant); width: 40%; }
.specs-table td:last-child { font-weight: 600; }

/* ---------- Reviews ---------- */
.product-reviews { margin-bottom: 2.5rem; }
.reviews-header { display: flex; align-items: center; justify-content: space-between; margin-bottom: 1.5rem; flex-wrap: wrap; gap: 1rem; }
.reviews-title { font-size: 1.375rem; font-weight: 700; margin: 0; }
.rating-overview { display: flex; align-items: center; gap: 2rem; flex-wrap: wrap; }
.rating-big { font-size: 3.5rem; font-weight: 800; color: var(--color-on-surface); line-height: 1; }
.rating-bars { flex: 1; display: flex; flex-direction: column; gap: 0.375rem; min-width: 10rem; }
.rating-bar-row { display: flex; align-items: center; gap: 0.5rem; font-size: 0.75rem; }
.rating-bar-track { flex: 1; height: 6px; background: var(--color-surface-container-high); border-radius: var(--radius-full); overflow: hidden; }
.rating-bar-fill { height: 100%; border-radius: var(--radius-full); background: var(--color-tertiary); }
.review-list { display: flex; flex-direction: column; gap: 1.5rem; }
.review-item {
    background: #fff; border-radius: var(--radius-xl);
    padding: 1.5rem; box-shadow: var(--shadow-botanical);
}
.review-item__header { display: flex; align-items: center; gap: 0.75rem; margin-bottom: 0.75rem; }
.review-item__avatar { width: 2.5rem; height: 2.5rem; border-radius: var(--radius-full); overflow: hidden; background: var(--color-surface-container-high); flex-shrink: 0; }
.review-item__avatar img { width: 100%; height: 100%; object-fit: cover; }
.review-item__name { font-weight: 700; font-size: 0.9375rem; }
.review-item__meta { font-size: 0.75rem; color: var(--color-on-surface-variant); margin-top: 0.125rem; }
.review-item__stars { display: flex; color: var(--color-tertiary); margin-bottom: 0.5rem; }
.review-item__stars span { font-size: 1rem; }
.verified-badge {
    display: inline-flex; align-items: center; gap: 0.25rem;
    background: rgba(164,244,189,0.3); color: #1E5037;
    border-radius: var(--radius-full); padding: 0.125rem 0.5rem;
    font-size: 0.625rem; font-weight: 700; text-transform: uppercase;
    letter-spacing: 0.08em;
}
.review-item__body { font-size: 0.9375rem; line-height: 1.7; color: var(--color-on-surface-variant); }

/* ---------- Related products ---------- */
.related-products { margin-bottom: 2.5rem; }
.related-heading { font-size: 1.375rem; font-weight: 700; margin-bottom: 1.5rem; }
.related-grid {
    display: grid; grid-template-columns: repeat(2, 1fr); gap: 1rem;
}
@media (min-width: 640px) { .related-grid { grid-template-columns: repeat(4, 1fr); } }

/* ---------- Sticky mobile buy bar ---------- */
.sticky-buy-bar {
    display: none;
    position: fixed; bottom: 0; left: 0; right: 0; z-index: 40;
    background: rgba(247,250,248,0.97);
    backdrop-filter: blur(8px);
    padding: 0.75rem 1.5rem;
    border-top: 1px solid var(--color-outline-variant);
    align-items: center; gap: 1rem;
}
@media (max-width: 767px) { .sticky-buy-bar { display: flex; } }
.sticky-buy-bar__price { display: flex; flex-direction: column; }
.sticky-buy-bar__current { font-size: 1.125rem; font-weight: 800; color: var(--color-primary); }
.sticky-buy-bar__original { font-size: 0.75rem; text-decoration: line-through; color: var(--color-on-surface-variant); }
.sticky-buy-bar__btn {
    flex: 1;
    display: inline-flex; align-items: center; justify-content: center; gap: 0.375rem;
    background: linear-gradient(135deg, #0A6439 0%, #2E7D50 100%);
    color: #fff; border: none; border-radius: var(--radius-full);
    padding: 0.875rem;
    font-size: 0.9375rem; font-weight: 700;
    font-family: var(--font-body); cursor: pointer;
}