/* ==========================================================================
   FLUX PRIME — product.css
   Product (project) detail page: gallery, buy panel, tabs, category sidebar.
   Requires: base.css, product-grid.css, category.css (breadcrumb/page-head),
             js/product.js
   ========================================================================== */

.pdp {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 290px;
  gap: clamp(var(--space-5), 3vw, var(--space-7));
  align-items: start;
  padding-block: var(--space-6) var(--space-9);
}

/* --------------------------------------------------------------------------
   Top: gallery + buy panel
   -------------------------------------------------------------------------- */
.pdp__top {
  display: grid;
  grid-template-columns: minmax(0, 0.95fr) minmax(0, 1fr);
  gap: clamp(var(--space-5), 3vw, var(--space-6));
  align-items: start;
}

/* --- Gallery --- */
.gallery__stage {
  position: relative;
  aspect-ratio: 1 / 1;
  overflow: hidden;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  background: linear-gradient(150deg, var(--color-surface-3), var(--color-surface));
}
.gallery__stage img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--dur-slow) var(--ease-out), opacity var(--dur-fast) linear;
}
.gallery__stage:hover img { transform: scale(1.06); }
.gallery__stage.is-swapping img { opacity: 0; }

.gallery__flags {
  position: absolute;
  top: var(--space-3);
  left: var(--space-3);
  z-index: 2;
  display: flex;
  gap: 5px;
}

.gallery__thumbs {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: var(--space-2);
  margin-top: var(--space-2);
}
.gallery__thumb {
  aspect-ratio: 1 / 1;
  overflow: hidden;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-surface-2);
  cursor: pointer;
  transition: border-color var(--dur-fast) var(--ease-out), opacity var(--dur-fast) var(--ease-out);
  opacity: 0.65;
}
.gallery__thumb img { width: 100%; height: 100%; object-fit: cover; }
.gallery__thumb:hover { opacity: 1; }
.gallery__thumb.is-active { border-color: var(--color-accent); opacity: 1; }
.gallery__thumb:focus-visible { outline: 2px solid var(--color-accent); outline-offset: 2px; }

/* --------------------------------------------------------------------------
   Buy panel
   -------------------------------------------------------------------------- */
.buy__cat {
  font-size: var(--text-sm);
  color: var(--color-accent);
}
.buy__title {
  margin-top: var(--space-2);
  font-size: clamp(1.5rem, 2.4vw, 2rem);
  line-height: 1.18;
}

.buy__meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-3);
  margin-top: var(--space-3);
  font-size: var(--text-sm);
  color: var(--color-text-light);
}
.buy__rating {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  font-family: var(--font-head);
  color: var(--color-text-muted);
}
.buy__rating svg { width: 13px; height: 13px; color: var(--color-accent); fill: currentColor; }
.buy__dot { color: var(--color-border-strong); }

.buy__price {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: var(--space-3);
  margin-top: var(--space-5);
}
.buy__price .price { font-size: clamp(1.6rem, 2.6vw, 2.1rem); }
.buy__tax {
  width: 100%;
  margin-top: 2px;
  font-size: var(--text-xs);
  color: var(--color-text-faint);
}

.buy__stock { margin-top: var(--space-4); }

/* --- Highlights --- */
.buy__points {
  display: grid;
  gap: var(--space-2);
  margin-top: var(--space-5);
  padding-top: var(--space-5);
  border-top: 1px solid var(--color-border);
}
.buy__points li {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  font-size: var(--text-sm);
  color: var(--color-text-muted);
}
.buy__points svg {
  width: 15px; height: 15px;
  flex-shrink: 0;
  margin-top: 4px;
  color: var(--color-accent);
}

/* --------------------------------------------------------------------------
   Synopsis download — free, no purchase required
   -------------------------------------------------------------------------- */
.synopsis {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  margin-top: var(--space-5);
  padding: var(--space-4);
  background: var(--color-surface);
  border: 1px solid rgba(212, 175, 55, 0.35);
  border-radius: var(--radius-lg);
}
.synopsis__icon {
  display: grid;
  place-items: center;
  width: 42px; height: 42px;
  flex-shrink: 0;
  border-radius: var(--radius-md);
  background: rgba(212, 175, 55, 0.12);
  color: var(--color-accent);
}
.synopsis__icon svg { width: 20px; height: 20px; }
.synopsis__body { flex: 1; min-width: 0; }
.synopsis__title {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--font-head);
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--color-text);
}
.synopsis__free {
  padding: 0.15em 0.5em;
  border-radius: var(--radius-pill);
  background: rgba(74, 222, 128, 0.14);
  color: var(--color-success);
  font-size: 0.6875rem;
  font-weight: 600;
}
.synopsis__note {
  margin-top: 3px;
  font-size: var(--text-xs);
  color: var(--color-text-faint);
}
.synopsis .btn { flex-shrink: 0; }

/* --------------------------------------------------------------------------
   Quantity + actions
   -------------------------------------------------------------------------- */
.buy__actions {
  display: grid;
  gap: var(--space-3);
  margin-top: var(--space-5);
}
.buy__row {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
}
.buy__row .btn { flex: 1; min-width: 11rem; }

.qty {
  display: inline-flex;
  align-items: center;
  border: 1px solid var(--color-border-strong);
  border-radius: var(--radius-md);
  overflow: hidden;
  flex-shrink: 0;
}
.qty button {
  width: 40px; height: 44px;
  display: grid;
  place-items: center;
  color: var(--color-text-muted);
  transition: background var(--dur-fast) var(--ease-out), color var(--dur-fast) var(--ease-out);
}
.qty button:hover { background: var(--color-surface-2); color: var(--color-text); }
.qty button:disabled { opacity: 0.35; pointer-events: none; }
.qty svg { width: 14px; height: 14px; }
.qty input {
  width: 46px;
  height: 44px;
  border: 0;
  background: transparent;
  text-align: center;
  font-family: var(--font-head);
  font-weight: 600;
  -moz-appearance: textfield;
}
.qty input::-webkit-outer-spin-button,
.qty input::-webkit-inner-spin-button { -webkit-appearance: none; margin: 0; }
.qty input:focus { outline: none; }

.btn--kit { font-size: 0.875rem; font-weight: 600; }

.buy__links {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-5);
  margin-top: var(--space-4);
}
.buy__links button {
  display: inline-flex;
  align-items: center;
  gap: 0.5em;
  font-size: var(--text-sm);
  color: var(--color-text-light);
  transition: color var(--dur-fast) var(--ease-out);
}
.buy__links button:hover { color: var(--color-text); }
.buy__links button[aria-pressed="true"] { color: var(--color-accent); }
.buy__links button[aria-pressed="true"] svg { fill: currentColor; }
.buy__links svg { width: 15px; height: 15px; }

/* --- Trust row --- */
.buy__trust {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--space-3);
  margin-top: var(--space-5);
  padding-top: var(--space-5);
  border-top: 1px solid var(--color-border);
}
.buy__trust div { display: grid; gap: 3px; justify-items: center; text-align: center; }
.buy__trust svg { width: 18px; height: 18px; color: var(--color-accent); }
.buy__trust span { font-size: var(--text-xs); color: var(--color-text-light); line-height: 1.35; }

/* --------------------------------------------------------------------------
   Tabs
   -------------------------------------------------------------------------- */
.pdp-tabs { margin-top: var(--space-8); }

.tablist {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-5);
  border-bottom: 1px solid var(--color-border);
}
.tablist button {
  position: relative;
  padding: var(--space-3) 0;
  font-family: var(--font-head);
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--color-text-light);
  transition: color var(--dur-fast) var(--ease-out);
}
.tablist button::after {
  content: "";
  position: absolute;
  left: 0; bottom: -1px;
  width: 100%; height: 2px;
  background: var(--color-accent);
  transform: scaleX(0);
  transition: transform var(--dur-mid) var(--ease-out);
}
.tablist button:hover { color: var(--color-text); }
.tablist button[aria-selected="true"] { color: var(--color-text); }
.tablist button[aria-selected="true"]::after { transform: scaleX(1); }

.tabpanel { padding-top: var(--space-5); max-width: 78ch; }
.tabpanel[hidden] { display: none; }
.tabpanel h3 {
  margin-top: var(--space-5);
  font-size: var(--text-lg);
}
.tabpanel h3:first-child { margin-top: 0; }
.tabpanel p { color: var(--color-text-muted); margin-top: var(--space-3); }
.tabpanel ul {
  display: grid;
  gap: var(--space-2);
  margin-top: var(--space-3);
}
.tabpanel ul li {
  display: flex;
  gap: var(--space-3);
  font-size: var(--text-sm);
  color: var(--color-text-muted);
}
.tabpanel ul li::before {
  content: "";
  flex-shrink: 0;
  width: 5px; height: 5px;
  margin-top: 0.6em;
  border-radius: 50%;
  background: var(--color-accent);
}

.spec-table { margin-top: var(--space-3); font-size: var(--text-sm); }
.spec-table th,
.spec-table td {
  padding: 0.7rem 0;
  border-bottom: 1px solid var(--color-border);
  text-align: left;
  vertical-align: top;
}
.spec-table th {
  width: 40%;
  font-weight: 400;
  color: var(--color-text-faint);
}
.spec-table td { color: var(--color-text-muted); }

/* --- Reviews --- */
.review {
  padding: var(--space-4) 0;
  border-bottom: 1px solid var(--color-border);
}
.review__head {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-3);
  font-size: var(--text-sm);
}
.review__name { font-family: var(--font-head); font-weight: 500; color: var(--color-text); }
.review__stars { color: var(--color-accent); letter-spacing: 1px; }
.review__date { color: var(--color-text-faint); font-size: var(--text-xs); }
.review p { margin-top: var(--space-2); font-size: var(--text-sm); }

/* --------------------------------------------------------------------------
   Right sidebar — all categories
   -------------------------------------------------------------------------- */
.pdp-side {
  position: sticky;
  top: calc(var(--header-h) + var(--space-4));
  display: grid;
  gap: var(--space-4);
  max-height: calc(100vh - var(--header-h) - var(--space-6));
  overflow-y: auto;
  overscroll-behavior: contain;
  padding-right: 2px;
}

.side-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
}
.side-card__head {
  padding: var(--space-4);
  border-bottom: 1px solid var(--color-border);
  font-family: var(--font-head);
  font-size: 0.9375rem;
  font-weight: 600;
}
.side-card__body { padding: var(--space-2); }

.side-group {
  padding: var(--space-3) var(--space-2) var(--space-1);
  font-family: var(--font-head);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: var(--tracking-wider);
  text-transform: uppercase;
  color: var(--color-text-faint);
}

.side-cats { display: grid; }
.side-cats a {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  padding: 0.5rem 0.6rem;
  border-radius: var(--radius-md);
  font-size: 0.875rem;
  color: var(--color-text-muted);
  transition: background var(--dur-fast) var(--ease-out), color var(--dur-fast) var(--ease-out);
}
.side-cats a:hover { background: var(--color-surface-3); color: var(--color-text); }
.side-cats a[aria-current="true"] {
  background: rgba(212, 175, 55, 0.1);
  color: var(--color-accent);
  font-weight: 500;
}
.side-cats__count { font-size: 0.75rem; color: var(--color-text-faint); font-variant-numeric: tabular-nums; }

.side-help { padding: var(--space-5); text-align: center; }
.side-help svg { width: 24px; height: 24px; color: var(--color-accent); margin: 0 auto var(--space-3); }
.side-help__title { font-family: var(--font-head); font-size: 0.9375rem; font-weight: 600; }
.side-help__text { margin-top: var(--space-2); font-size: var(--text-xs); color: var(--color-text-light); }
.side-help .btn { margin-top: var(--space-4); width: 100%; }

/* --------------------------------------------------------------------------
   Related
   -------------------------------------------------------------------------- */
.pdp-related { margin-top: var(--space-8); }
.product-grid.product-grid--related { grid-template-columns: repeat(5, minmax(0, 1fr)); gap: var(--space-3); }
@media (max-width: 1240px) { .product-grid.product-grid--related { grid-template-columns: repeat(4, minmax(0, 1fr)); } }
@media (max-width: 900px)  { .product-grid.product-grid--related { grid-template-columns: repeat(3, minmax(0, 1fr)); } }
@media (max-width: 680px)  { .product-grid.product-grid--related { grid-template-columns: repeat(2, minmax(0, 1fr)); } }

/* --------------------------------------------------------------------------
   Responsive
   -------------------------------------------------------------------------- */
@media (max-width: 1180px) {
  .pdp { grid-template-columns: minmax(0, 1fr); }
  .pdp-side {
    position: static;
    max-height: none;
    overflow: visible;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    align-items: start;
  }
}

@media (max-width: 880px) {
  .pdp__top { grid-template-columns: minmax(0, 1fr); }
  .pdp-side { grid-template-columns: minmax(0, 1fr); }
  .buy__row .btn { min-width: 0; }
}

@media (max-width: 560px) {
  .buy__trust { grid-template-columns: minmax(0, 1fr); }
  .buy__trust div { grid-auto-flow: column; justify-items: start; justify-content: start; gap: var(--space-3); align-items: center; text-align: left; }
  .synopsis { flex-wrap: wrap; }
  .synopsis .btn { width: 100%; }
}

/* --------------------------------------------------------------------------
   Product options
   Rendered from the product's option groups — kit tiers and anything else
   set up under Product options in the admin panel.
   -------------------------------------------------------------------------- */
.buy__lede {
  margin-top: var(--space-4);
  color: var(--color-text-light);
  font-size: var(--text-sm);
  line-height: var(--leading-normal);
}

.opt-group {
  margin: var(--space-5) 0 0;
  padding: 0;
  border: 0;
}
.opt-group__title {
  display: flex;
  align-items: baseline;
  gap: var(--space-2);
  padding: 0;
  margin-bottom: var(--space-3);
  font-family: var(--font-head);
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--color-text);
}
.opt-group__req {
  font-family: var(--font-sans);
  font-size: 0.6875rem;
  font-weight: 500;
  letter-spacing: var(--tracking-wide);
  text-transform: uppercase;
  color: var(--color-text-faint);
}

.opt-list { display: grid; gap: var(--space-2); }

.opt-card {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-4);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-surface);
  cursor: pointer;
  transition: border-color var(--dur-fast) var(--ease-out),
              background var(--dur-fast) var(--ease-out);
}
.opt-card:hover { border-color: var(--color-border-strong); }
.opt-card input { accent-color: var(--color-brand); width: 16px; height: 16px; }
.opt-card:has(input:checked) {
  border-color: var(--color-brand);
  background: rgba(0, 133, 251, 0.06);
}
.opt-card:has(input:focus-visible) { outline: 2px solid var(--color-brand); outline-offset: 2px; }

.opt-card__body { display: grid; gap: 2px; min-width: 0; }
.opt-card__name { font-size: var(--text-sm); font-weight: 500; color: var(--color-text); }
.opt-card__note { font-size: var(--text-xs); color: var(--color-text-faint); line-height: 1.45; }
.opt-card__price {
  font-family: var(--font-head);
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--color-text);
  white-space: nowrap;
}

/* --------------------------------------------------------------------------
   Specification table, built from "Label: value" lines
   -------------------------------------------------------------------------- */
.spec-table {
  width: 100%;
  border-collapse: collapse;
  margin-top: var(--space-3);
  font-size: var(--text-sm);
}
.spec-table th,
.spec-table td {
  padding: var(--space-3) var(--space-4);
  text-align: left;
  border-bottom: 1px solid var(--color-border);
  vertical-align: top;
}
.spec-table th {
  width: 36%;
  font-weight: 500;
  color: var(--color-text-faint);
}
.spec-table td { color: var(--color-text-muted); }
.spec-table tr:last-child th,
.spec-table tr:last-child td { border-bottom: 0; }

@media (max-width: 520px) {
  .opt-card { grid-template-columns: auto minmax(0, 1fr); }
  .opt-card__price { grid-column: 2; }
  .spec-table th { width: 44%; }
}