/* Collection page — sections/main-collection-banner, main-collection, blocks/filters. B2B catalogue, no prices (brief/b2b-installatori.md §5.2). Tokens from tokens.css. */

/* ---------- header band ---------- */
.col-head { padding-top: clamp(20px, 2.4vw, 32px); }
.col-crumbs ol { display: flex; flex-wrap: wrap; gap: 6px; padding: 0; list-style: none; font-size: var(--font-size-sm); color: var(--color-muted); }
.col-crumbs li + li::before { content: "/"; margin-right: 6px; color: var(--color-border-strong); }
.col-crumbs a { color: var(--color-foreground-2); }
.col-crumbs a:hover { color: var(--color-link); text-decoration: underline; text-underline-offset: 3px; }
.col-head__grid { display: grid; grid-template-columns: minmax(0, 5fr) minmax(0, 7fr); gap: clamp(24px, 4vw, 64px); align-items: center; margin-top: clamp(20px, 2.6vw, 36px); }
.col-head__title { font-size: clamp(2.25rem, 4.2vw, 3.5rem); letter-spacing: var(--letter-spacing-display); line-height: 1.04; }
.col-head__desc { margin-top: 16px; max-width: 46ch; font-size: var(--font-size-lg); line-height: 1.55; color: var(--color-muted); }
.col-head__count { margin-top: 22px; display: inline-flex; align-items: center; gap: 10px; font-size: var(--font-size-sm); font-weight: var(--font-weight-semibold); color: var(--color-foreground-2); }
.col-head__count::before { content: ""; width: 8px; height: 8px; background: var(--color-primary); }
.col-head__media { margin: 0; aspect-ratio: 16 / 6.6; border-radius: var(--radius-card); overflow: hidden; background: var(--color-surface); }
.col-head__media picture { display: block; height: 100%; }
.col-head__media img { width: 100%; height: 100%; object-fit: cover; }
.col-head__media[hidden] { display: none; }

/* ---------- category navigation ---------- */
.col-nav { position: relative; margin-top: clamp(28px, 3.4vw, 48px); border-bottom: 1px solid var(--color-border); }
.col-nav .page-width { position: relative; }
.col-nav__list { display: flex; gap: 6px; min-height: calc(var(--touch-target) + 16px); list-style: none; padding: 0 0 16px; overflow-x: auto; scrollbar-width: none; scroll-snap-type: x proximity; }
.col-nav__list::-webkit-scrollbar { display: none; }
.col-nav__list li { scroll-snap-align: start; flex: none; }
.col-nav__pill { display: inline-flex; align-items: center; gap: 8px; min-height: var(--touch-target); padding: 0 18px; border-radius: var(--radius-pill); border: 1px solid var(--color-border); font-size: 15px; font-weight: var(--font-weight-medium); color: var(--color-foreground-2); white-space: nowrap; transition: border-color var(--duration-fast), background-color var(--duration-fast), color var(--duration-fast); }
.col-nav__pill:hover { border-color: var(--color-foreground); color: var(--color-foreground); }
.col-nav__pill[aria-current="page"] { background: var(--color-deep); border-color: var(--color-deep); color: #fff; }
.col-nav__n { font-size: 12px; font-weight: var(--font-weight-semibold); color: var(--color-muted); }
.col-nav__pill[aria-current="page"] .col-nav__n { color: rgb(255 255 255 / 0.75); }
.col-nav .page-width::before, .col-nav .page-width::after { content: ""; position: absolute; top: 0; bottom: 16px; width: 48px; pointer-events: none; opacity: 0; transition: opacity var(--duration-base); z-index: 1; }
.col-nav .page-width::before { left: var(--gutter); background: linear-gradient(90deg, #fff, rgb(255 255 255 / 0)); }
.col-nav .page-width::after { right: var(--gutter); background: linear-gradient(270deg, #fff, rgb(255 255 255 / 0)); }
.col-nav .page-width.is-fade-start::before, .col-nav .page-width.is-fade-end::after { opacity: 1; }

/* ---------- tech line band ---------- */
.col-cta { padding-bottom: var(--space-section); }
.col-cta__inner { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 20px 40px; padding: 32px 36px; border-radius: var(--radius-card); background: var(--color-deep); color: #fff; }
.col-cta__title { font-size: clamp(20px, 1.6vw, 26px); font-weight: var(--font-weight-medium); letter-spacing: -0.015em; line-height: 1.25; max-width: 30ch; }
.col-cta__text { margin-top: 8px; font-size: 15px; color: oklch(0.9 0.02 240); max-width: 56ch; }
.col-cta__button { flex: none; }
.col-cta__button .icon { width: 20px; height: 20px; }
.col-cta :focus-visible { outline-color: #fff; }

/* ---------- layout ---------- */
.col-layout { display: grid; grid-template-columns: 264px minmax(0, 1fr); gap: clamp(32px, 4vw, 56px); padding-top: 36px; padding-bottom: clamp(40px, 5vw, 64px); }
.col-filters { position: sticky; top: calc(var(--header-height-compact) + 24px); align-self: start; max-height: calc(100vh - var(--header-height-compact) - 48px); overflow: hidden auto; overscroll-behavior: contain; scrollbar-width: thin; scrollbar-color: transparent transparent; padding: 0 10px 0 8px; margin-left: -8px; }
.col-filters:hover, .col-filters:focus-within { scrollbar-color: var(--color-border-strong) transparent; }

/* facets */
.facet { border-bottom: 1px solid var(--color-border); }
.facet:first-child { border-top: 1px solid var(--color-border); }
.facet summary { display: flex; align-items: center; justify-content: space-between; gap: 12px; min-height: 56px; cursor: pointer; list-style: none; font-size: 15px; font-weight: var(--font-weight-semibold); }
.facet summary::-webkit-details-marker { display: none; }
.facet summary > span { display: inline-flex; align-items: center; gap: 8px; }
.facet summary .icon { color: var(--color-muted); transition: transform var(--duration-base) var(--ease-out); }
.facet[open] summary .icon { transform: rotate(180deg); }
.facet summary:hover { color: var(--color-link); }
.facet__n { display: inline-grid; place-items: center; min-width: 20px; height: 20px; padding: 0 6px; border-radius: 10px; background: var(--color-deep); color: #fff; font-size: 11px; }
.facet__body { padding-bottom: 18px; }
.facet fieldset { border: 0; padding: 0; margin: 0; min-width: 0; }
.facet__list { display: grid; gap: 2px; list-style: none; padding: 0; }
.facet__opt { position: relative; display: grid; grid-template-columns: 20px minmax(0, 1fr) auto; align-items: center; gap: 12px; min-height: var(--touch-target); padding: 0 8px; margin: 0 -8px; border-radius: var(--radius-sm); cursor: pointer; font-size: 15px; transition: background-color var(--duration-fast); }
.facet__opt:hover { background: var(--color-surface); }
.facet__opt input { position: absolute; opacity: 0; width: 20px; height: 20px; margin: 0; left: 8px; cursor: pointer; }
.facet__box { display: grid; place-items: center; width: 20px; height: 20px; border: 1.5px solid var(--color-border-strong); border-radius: 5px; background: #fff; color: #fff; transition: background-color var(--duration-fast), border-color var(--duration-fast); }
.facet__box .icon { width: 14px; height: 14px; stroke-width: 2.2; opacity: 0; transform: scale(0.6); transition: opacity var(--duration-fast), transform var(--duration-fast) var(--ease-spring); }
.facet__opt:hover .facet__box { border-color: var(--color-foreground-2); }
.facet__opt input:checked + .facet__box { background: var(--color-deep); border-color: var(--color-deep); }
.facet__opt input:checked + .facet__box .icon { opacity: 1; transform: none; }
.facet__opt input:focus-visible + .facet__box { outline: 2px solid var(--color-primary); outline-offset: 2px; }
.facet__label { min-width: 0; line-height: 1.35; }
.facet__count { font-size: 13px; color: var(--color-muted); font-variant-numeric: tabular-nums; }
.facet__opt.is-disabled { cursor: not-allowed; color: var(--color-muted); }
.facet__opt.is-disabled:hover { background: none; }
.facet__opt.is-disabled .facet__box { background: var(--color-surface); border-color: var(--color-border); }
.facets__clear { margin-top: 20px; min-height: var(--touch-target); }

/* ---------- toolbar + chips ---------- */
.col-toolbar { display: flex; align-items: center; gap: 16px; min-height: 56px; }
.col-toolbar__filters { display: none; gap: 8px; }
.col-toolbar__badge { display: inline-grid; place-items: center; min-width: 20px; height: 20px; padding: 0 6px; border-radius: 10px; background: var(--color-deep); color: #fff; font-size: 11px; }
.col-toolbar__filters:hover .col-toolbar__badge, .col-toolbar__filters:active .col-toolbar__badge { background: #fff; color: var(--color-deep); }
.col-toolbar__count { margin-right: auto; font-size: 15px; font-weight: var(--font-weight-medium); color: var(--color-foreground-2); }
.col-sort { display: flex; align-items: center; gap: 10px; }
.col-sort__label { font-size: var(--font-size-sm); color: var(--color-muted); white-space: nowrap; }
.col-sort__select { width: auto; min-width: 200px; min-height: 44px; border-radius: var(--radius-pill); padding-left: 18px; font-size: 15px; }
.col-active { margin: 4px 0 8px; }
.col-has-filters .col-active[hidden] { display: block !important; min-height: var(--touch-target); } /* one chip row, until collection.js renders it */
.col-active .chip-list { align-items: center; }
.col-active .chip--removable:focus-visible { outline: 2px solid var(--color-primary); outline-offset: 2px; }
.col-active__clear { min-height: 36px; padding: 0 8px; font-size: 14px; font-weight: var(--font-weight-semibold); color: var(--color-link); text-decoration: underline; text-underline-offset: 3px; }
.col-active__clear:hover { text-decoration-thickness: 2px; }

/* ---------- grid ---------- */
.col-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: var(--grid-gap); list-style: none; padding: 0; margin-top: 16px; transition: opacity var(--duration-base); }
.col-grid.is-loading { opacity: 0.45; pointer-events: none; }
.col-grid__item { min-width: 0; }
.col-grid product-card { height: 100%; }
.col-skel { display: block; aspect-ratio: 3 / 4.4; border-radius: var(--radius-card); }
@media (prefers-reduced-motion: no-preference) {
  .col-grid__item.is-new { animation: col-in 0.7s var(--ease-out) both; animation-delay: calc(var(--i, 0) * 70ms); }
  @keyframes col-in { from { opacity: 0; transform: translateY(18px); } }
}

/* empty + more */
.col-empty { display: grid; justify-items: center; gap: 12px; padding: 64px 24px; margin-top: 16px; border-radius: var(--radius-card); background: var(--color-surface); text-align: center; }
.col-empty p { color: var(--color-muted); max-width: 42ch; }
.col-empty__actions { display: flex; flex-wrap: wrap; justify-content: center; gap: 10px; margin-top: 8px; }
.col-empty__icon { display: grid; place-items: center; width: 64px; height: 64px; border-radius: 50%; background: #fff; color: var(--color-muted); }
.col-more { display: grid; justify-items: center; gap: 14px; margin-top: 48px; }
.col-more__meta { font-size: var(--font-size-sm); color: var(--color-muted); }
.col-more__bar { width: 200px; height: 2px; background: var(--color-border); border-radius: 1px; overflow: hidden; }
.col-more__bar i { display: block; height: 100%; background: var(--color-deep); transform-origin: left; transform: scaleX(var(--p, 0)); transition: transform var(--duration-slow) var(--ease-out); }
.col-more__n { font-weight: var(--font-weight-regular); }

.col-missing { display: flex; flex-wrap: wrap; align-items: center; gap: 24px; padding-block: 40px var(--space-section); }

/* ---------- mobile drawer ---------- */
.col-drawer { width: 100%; max-width: 100%; }
.col-drawer .drawer__body { padding-top: 8px; overflow-x: hidden; }
.col-drawer .facets__clear { display: none; } /* the drawer footer has its own «Rimuovi tutti» */
.col-drawer .facet:first-child { border-top: 0; }
.col-drawer__foot { display: grid; grid-template-columns: auto 1fr; gap: 10px; }
.col-drawer__foot .button { min-width: 0; }
.col-drawer__foot .button:last-child { font-size: 17px; --button-bg: var(--color-deep); } /* 17 px: white on Midea Blue would be < AA */
.col-drawer__foot .button:last-child:hover { --button-bg: var(--color-deep-hover); }

/* ---------- responsive ---------- */
@media (max-width: 1180px) { .col-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
@media (max-width: 1000px) {
  .col-layout { grid-template-columns: minmax(0, 1fr); padding-top: 0; }
  .col-filters { display: none; }
  .col-toolbar { position: sticky; top: var(--header-height-live, 60px); z-index: var(--z-sticky); margin: 0 calc(-1 * var(--gutter)); padding: 10px var(--gutter); background: rgb(255 255 255 / 0.96); backdrop-filter: blur(10px); -webkit-backdrop-filter: blur(10px); border-bottom: 1px solid var(--color-border); }
  .col-toolbar__filters { display: inline-flex; }
  .col-toolbar__count { order: 3; flex-basis: 100%; min-height: 1.6em; margin: 0; font-size: 13px; color: var(--color-muted); } /* line reserved before the count is written */
  .col-toolbar { flex-wrap: wrap; row-gap: 6px; }
  .col-toolbar__filters { flex: none; }
  .col-sort { flex: 1 1 0; min-width: 0; justify-content: flex-end; }
  .col-sort__label { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; } /* still names the select */
  .col-sort__select { min-width: 0; width: 100%; max-width: 230px; }
  .col-active { margin-top: 14px; }
  .col-cta__inner { padding: 26px 24px; }
}
@media (max-width: 760px) {
  .col-head__grid { grid-template-columns: minmax(0, 1fr); }
  .col-head__media { order: -1; aspect-ratio: 16 / 8; border-radius: var(--radius-tile); }
  .col-head__desc { font-size: 16px; }
  .col-head__count { margin-top: 14px; }
  .col-nav { margin-top: 24px; }
  .col-nav .page-width { padding-inline: 0; }
  .col-nav__list { padding-inline: var(--gutter); scroll-padding-inline: var(--gutter); }
  .col-nav .page-width::before { left: 0; }
  .col-nav .page-width::after { right: 0; }
}
@media (max-width: 600px) {
  /* compact horizontal cards: image left, details right */
  .col-grid { grid-template-columns: minmax(0, 1fr); gap: 12px; }
  .col-grid .card { flex-direction: row; border-radius: var(--radius-tile); }
  .col-grid .card__media { flex: none; width: 38%; aspect-ratio: auto; min-height: 100%; border-bottom: 0; border-right: 1px solid var(--color-border); }
  .col-grid .card__media img { position: absolute; inset: 0; padding: 10%; }
  .col-grid .card__badges { inset: 10px 10px auto; }
  .col-grid .card__badges .badge { display: none; }
  .col-grid .card__body { padding: 14px 14px 14px 16px; min-width: 0; }
  .col-grid .card__type { font-size: 11px; }
  .col-grid .card__title { font-size: 16px; margin: 4px 0; }
  .col-grid .card__summary { display: none; }
  .col-grid .card__foot { flex-direction: column; align-items: stretch; gap: 10px; padding-top: 10px; }
  .col-grid .card__foot .button { width: 100%; min-height: var(--touch-target); }
  .col-grid .card__foot quick-add { display: block; }
  .col-skel { aspect-ratio: auto; height: 210px; border-radius: var(--radius-tile); }
}