/* ==========================================================================
   DahuaNet — pages/product.css
   صفحه‌ی محصول: گالری با زوم، جعبه‌ی خرید، انتخاب تنوع، بخش‌ها، مشخصات، دیدگاه‌ها و نوار خرید موبایل.
   ========================================================================== */

.product { padding-block: 20px 0; }
.product__crumbs { margin-bottom: 18px; }
.product__top {
  display: grid;
  gap: clamp(24px, 4vw, 56px);
  align-items: start;
}
@media (min-width: 961px) {
  .product__top { grid-template-columns: minmax(0, 1fr) minmax(0, 1.05fr); }
  .gallery { position: sticky; top: calc(var(--header-offset, 140px) + 16px); }
}

/* ---------- گالری ---------- */
.gallery { display: grid; gap: 12px; }
.gallery__main {
  position: relative;
  display: grid;
  place-items: center;
  aspect-ratio: 1 / 1;
  max-width: 100%;
  margin: 0;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--r-xl);
  background: var(--grad-media);
  cursor: zoom-in;
}
.gallery__main img { width: 84%; height: 84%; object-fit: contain; transition: opacity .3s var(--ease); }
.gallery__main img.is-swapping { opacity: 0; }
.gallery__focus { inset: 26px; }
.gallery__main:hover .gallery__focus { inset: 16px; opacity: 1; }
.gallery__lens {
  position: absolute;
  inset: 0;
  background-repeat: no-repeat;
  background-size: 220%;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--dur-2);
  background-color: var(--bg);
}
.gallery__main.is-zooming .gallery__lens { opacity: 1; }
.gallery__flags { position: absolute; top: 18px; inset-inline-start: 18px; display: grid; gap: 6px; }
.gallery__thumbs { display: flex; gap: 10px; overflow-x: auto; scrollbar-width: none; padding: 2px; }
.gallery__thumbs::-webkit-scrollbar { display: none; }
.gallery__thumb {
  flex: none;
  display: grid;
  place-items: center;
  width: 76px;
  height: 76px;
  padding: 6px;
  border: 1.5px solid var(--line);
  border-radius: var(--r);
  background: var(--grad-media);
  cursor: pointer;
  transition: border-color var(--dur-2), transform var(--dur-2);
}
.gallery__thumb img { width: 100%; height: 100%; object-fit: contain; }
.gallery__thumb:hover { transform: translateY(-2px); }
.gallery__thumb.is-active { border-color: var(--azure); box-shadow: 0 0 0 3px rgba(46, 139, 255, .15); }

/* ---------- اطلاعات و خرید ---------- */
.buy { display: grid; gap: 18px; }
.buy__eyebrow { display: flex; flex-wrap: wrap; align-items: center; gap: 8px 12px; }
.buy__cat { color: var(--azure); font-size: var(--fs-sm); font-weight: 800; }
.buy__sku {
  padding: 3px 10px;
  border-radius: var(--r-xs);
  background: var(--bg-soft);
  color: var(--fg-muted);
  font-size: var(--fs-xs);
}
.buy__title { font-size: var(--fs-2xl); line-height: 1.6; }
.buy__subtitle { color: var(--fg-subtle); font-size: var(--fs-sm); text-align: start; }
.buy__meta { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 12px; }
.buy__rating { display: inline-flex; align-items: center; gap: 6px; font-size: var(--fs-sm); color: var(--fg-muted); }
.buy__rating .icon { color: var(--amber); fill: var(--amber); }
.buy__rating b { color: var(--fg); }
.buy__tools { display: flex; gap: 6px; }
.buy__excerpt { color: var(--fg-muted); line-height: 2; }

.keyspecs { display: grid; grid-template-columns: repeat(auto-fit, minmax(min(100%, 140px), 1fr)); gap: 10px; }
.keyspec {
  position: relative;
  display: grid;
  gap: 2px;
  padding: 14px;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  background: var(--bg);
}
.keyspec::after {
  content: "";
  position: absolute;
  width: 90px;
  height: 90px;
  inset-inline-end: -36px;
  bottom: -40px;
  border-radius: 50%;
  background: repeating-radial-gradient(circle, transparent 0 9px, rgba(46, 139, 255, .08) 9px 10px);
}
.keyspec__icon {
  display: grid;
  place-items: center;
  width: 34px;
  height: 34px;
  margin-bottom: 6px;
  border-radius: 10px;
  background: var(--bg-tint);
  color: var(--primary);
}
.keyspec__value { font-weight: 900; font-size: var(--fs-md); line-height: 1.5; }
.keyspec__name { color: var(--fg-subtle); font-size: var(--fs-2xs); font-weight: 700; }

.options { display: grid; gap: 14px; }
.options__group { margin: 0; padding: 0; border: 0; display: grid; gap: 8px; }
.options__group legend { padding: 0 0 8px; font-size: var(--fs-sm); font-weight: 700; color: var(--fg-muted); }
.options__group legend b { color: var(--fg); }
.option { cursor: pointer; }
.option input:checked + .option__chip { border-color: var(--navy); background: var(--navy); color: #fff; }
.option input:focus-visible + .option__chip { outline: 2px solid var(--azure); outline-offset: 3px; }
.option input.is-unavailable + .option__chip { border-style: dashed; color: var(--fg-subtle); text-decoration: line-through; }

.buybox {
  display: grid;
  gap: 16px;
  padding: 20px;
  border: 1px solid var(--line);
  border-radius: var(--r-xl);
  background: linear-gradient(180deg, var(--bg-soft), var(--bg));
}
.buybox__price { display: flex; flex-wrap: wrap; align-items: flex-end; justify-content: space-between; gap: 12px; }
.buybox__actions { display: flex; flex-wrap: wrap; gap: 10px; }
.buybox__add { flex: 1 1 220px; }
.stock {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 12px;
  border-radius: var(--r-pill);
  font-size: var(--fs-xs);
  font-weight: 800;
}
.stock::before { content: ""; width: 7px; height: 7px; border-radius: 50%; background: currentColor; }
.stock--in { background: var(--success-bg); color: var(--success); }
.stock--low { background: var(--warning-bg); color: var(--warning); }
.stock--out { background: var(--danger-bg); color: var(--danger); }
.notify { display: grid; gap: 10px; }
.notify__text { display: flex; align-items: center; gap: 8px; color: var(--fg-muted); font-size: var(--fs-sm); }
.notify__row { display: flex; gap: 8px; }
.notify__row .input { flex: 1; min-width: 0; }

.buy__trust {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
  color: var(--fg-muted);
  font-size: var(--fs-xs);
  font-weight: 700;
}
.buy__trust li { display: flex; align-items: center; gap: 8px; }
.buy__trust .icon { color: var(--primary); }

/* ---------- ناوبری بخش‌ها ---------- */
.ptabs {
  position: sticky;
  top: var(--header-offset, 0px);
  z-index: 40;
  margin-top: clamp(32px, 5vw, 56px);
  border-block: 1px solid var(--line);
  background: rgba(255, 255, 255, .94);
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
}
.ptabs__inner { display: flex; gap: 4px; overflow-x: auto; scrollbar-width: none; }
.ptabs__inner::-webkit-scrollbar { display: none; }
.ptabs__link {
  position: relative;
  padding: 14px 16px;
  color: var(--fg-muted);
  font-size: var(--fs-sm);
  font-weight: 700;
  white-space: nowrap;
}
.ptabs__link::after {
  content: "";
  position: absolute;
  inset-inline: 12px;
  bottom: -1px;
  height: 3px;
  border-radius: 3px 3px 0 0;
  background: var(--grad-brand);
  transform: scaleX(0);
  transition: transform var(--dur-3) var(--ease);
}
.ptabs__link:hover, .ptabs__link.is-active { color: var(--fg); }
.ptabs__link.is-active::after { transform: scaleX(1); }

/* ---------- بخش‌ها ---------- */
.product__body { display: grid; gap: clamp(40px, 6vw, 64px); padding-block: clamp(32px, 5vw, 56px); }
.psec { display: grid; gap: 18px; scroll-margin-top: calc(var(--header-offset, 140px) + 64px); }
.psec__title { display: flex; align-items: center; gap: 10px; font-size: var(--fs-2xl); }
.psec__title::before { content: ""; width: 6px; height: 28px; border-radius: 3px; background: var(--grad-brand); }
.psec__sub { font-size: var(--fs-lg); margin-top: 8px; }
.psec .prose { max-width: 80ch; }

.specs { display: grid; margin: 0; border: 1px solid var(--line); border-radius: var(--r-lg); overflow: hidden; }
.specs__row { display: grid; grid-template-columns: minmax(130px, 34%) 1fr; }
.specs__row:nth-child(odd) { background: var(--bg-soft); }
.specs dt, .specs dd { margin: 0; padding: 12px 18px; font-size: var(--fs-sm); }
.specs dt { color: var(--fg-muted); font-weight: 700; }
.specs dd { font-weight: 700; }

.pvideo { margin: 0; display: grid; gap: 8px; }
.pvideo video { width: 100%; max-width: 100%; aspect-ratio: 16 / 9; border-radius: var(--r-xl); background: var(--night); }
.pvideo figcaption { color: var(--fg-muted); font-size: var(--fs-sm); }
.downloads { display: grid; gap: 10px; grid-template-columns: repeat(auto-fill, minmax(min(100%, 280px), 1fr)); }
.download {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 16px;
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  transition: border-color var(--dur-2), box-shadow var(--dur-2);
}
.download:hover { border-color: transparent; box-shadow: var(--sh-2); }
.download__ext {
  display: grid;
  place-items: center;
  flex: none;
  width: 46px;
  height: 46px;
  border-radius: var(--r-sm);
  background: var(--grad-brand);
  color: #fff;
  font-family: var(--font-code);
  font-size: var(--fs-2xs);
  font-weight: 700;
}
.download__name { display: grid; flex: 1; min-width: 0; font-weight: 700; font-size: var(--fs-sm); }
.download__name small { color: var(--fg-subtle); font-weight: 600; }
.download .icon { color: var(--primary); }

/* ---------- دیدگاه‌ها ---------- */
.reviews { display: grid; gap: 28px; align-items: start; }
@media (min-width: 961px) { .reviews { grid-template-columns: 300px minmax(0, 1fr); } }
.reviews__summary {
  display: grid;
  gap: 12px;
  padding: 22px;
  border: 1px solid var(--line);
  border-radius: var(--r-xl);
  background: var(--bg-soft);
}
.reviews__avg { display: flex; align-items: baseline; gap: 8px; }
.reviews__avg b { font-size: 3rem; font-weight: 900; line-height: 1; }
.reviews__avg span { color: var(--fg-subtle); }
.reviews__dist { display: grid; gap: 6px; font-size: var(--fs-xs); color: var(--fg-muted); }
.reviews__dist li { display: grid; grid-template-columns: 54px 1fr 28px; align-items: center; gap: 8px; }
.reviews__dist .bar { height: 7px; border-radius: 4px; background: var(--line); overflow: hidden; }
.reviews__dist .bar span { display: block; height: 100%; border-radius: inherit; background: var(--amber); }
.reviews__main { display: grid; gap: 22px; }

.stars {
  --rating: 0;
  position: relative;
  display: inline-block;
  font-size: 1.25rem;
  line-height: 1;
  letter-spacing: 2px;
}
.stars::before {
  content: "★★★★★";
  background: linear-gradient(to left, var(--amber) calc(var(--rating) / 5 * 100%), var(--line) 0);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
[dir="ltr"] .stars::before { background: linear-gradient(to right, var(--amber) calc(var(--rating) / 5 * 100%), var(--line) 0); -webkit-background-clip: text; background-clip: text; }
.stars--sm { font-size: .95rem; }

.review-form {
  display: grid;
  gap: 14px;
  padding: 22px;
  border: 1px solid var(--line);
  border-radius: var(--r-xl);
  background: var(--bg);
}
.review-form__pc { display: grid; gap: 14px; grid-template-columns: repeat(auto-fit, minmax(min(100%, 240px), 1fr)); }
.rate { margin: 0; padding: 0; border: 0; }
.rate legend { margin-bottom: 6px; font-size: var(--fs-sm); font-weight: 700; }
.rate__stars { display: inline-flex; flex-direction: row-reverse; gap: 2px; }
.rate__stars label { cursor: pointer; color: var(--line-strong); transition: color var(--dur-1), transform var(--dur-2) var(--ease-spring); }
.rate__stars .icon { width: 30px; height: 30px; fill: currentColor; stroke: none; }
.rate__stars input:checked ~ label,
.rate__stars label:hover,
.rate__stars label:hover ~ label { color: var(--amber); }
.rate__stars label:hover { transform: scale(1.15); }
.rate__stars input:focus-visible + label { outline: 2px solid var(--azure); outline-offset: 2px; border-radius: 6px; }

.review-list { display: grid; gap: 14px; }
.review {
  display: grid;
  gap: 10px;
  padding: 18px 20px;
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
}
.review__head { display: flex; flex-wrap: wrap; align-items: center; gap: 10px 12px; }
.review__head > div { display: grid; line-height: 1.5; }
.review__head .stars { margin-inline-start: auto; }
.review__avatar {
  display: grid;
  place-items: center;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--grad-brand);
  color: #fff;
  font-weight: 800;
}
.review__title { font-size: var(--fs-md); }
.review__text { color: var(--fg-muted); line-height: 2; white-space: pre-line; }
.review__pc { display: grid; gap: 10px; grid-template-columns: repeat(auto-fit, minmax(min(100%, 220px), 1fr)); font-size: var(--fs-sm); }
.review__pros li, .review__cons li { display: flex; align-items: center; gap: 6px; }
.review__pros .icon { color: var(--success); }
.review__cons .icon { color: var(--danger); }
.review__reply { padding: 12px 14px; border-radius: var(--r); background: var(--bg-tint); color: var(--primary); font-size: var(--fs-sm); }
.review__foot { display: flex; justify-content: flex-end; }
.review__foot .btn[disabled] { opacity: .6; }

/* ---------- بازدیدهای اخیر ---------- */
.recent__list { display: grid; gap: 12px; grid-template-columns: repeat(auto-fill, minmax(min(100%, 220px), 1fr)); }
.recent__item a {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px;
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  transition: box-shadow var(--dur-2), border-color var(--dur-2);
}
.recent__item a:hover { border-color: transparent; box-shadow: var(--sh-2); }
.recent__item img { flex: none; width: 64px; height: 64px; object-fit: contain; border-radius: var(--r-sm); background: var(--grad-media); }
.recent__item span { display: grid; min-width: 0; font-size: var(--fs-sm); font-weight: 700; line-height: 1.6; }
.recent__item small { color: var(--primary); font-weight: 800; }

/* ---------- نوار خرید چسبان (موبایل) ---------- */
.buybar { display: none; }
@media (max-width: 960px) {
  .buybar {
    position: fixed;
    inset-inline: 0;
    bottom: calc(var(--tabbar-h, 64px) + env(safe-area-inset-bottom, 0px));
    z-index: 85;
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 10px max(16px, env(safe-area-inset-right, 0px)) 10px max(16px, env(safe-area-inset-left, 0px));
    border-top: 1px solid var(--line);
    background: rgba(255, 255, 255, .96);
    -webkit-backdrop-filter: blur(14px);
    backdrop-filter: blur(14px);
    box-shadow: 0 -10px 30px -18px rgba(17, 39, 95, .35);
    transform: translateY(140%);
    transition: transform .4s var(--ease);
  }
  .buybar.is-visible { transform: none; }
  .buybar__info { display: grid; flex: 1; min-width: 0; line-height: 1.5; }
  .buybar__title { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; font-size: var(--fs-xs); }
  .buybar__price { font-weight: 900; }
  .compare-bar.is-visible { bottom: calc(var(--tabbar-h, 64px) + 86px + env(safe-area-inset-bottom, 0px)); }
}