/* ============================================================================
   NOVA FORM — collection.css
   Project C: collection browsing and the bundle builder.
   Loaded alongside theme.css; adds no tokens of its own.
   ========================================================================= */

/* ----- Collection head and controls --------------------------------------- */
.collection__head { margin-bottom: var(--space-lg); }
.collection__title { font-size: var(--text-2xl); margin-bottom: var(--space-xs); }
.collection__description { color: var(--color-text-muted); max-width: var(--measure); }

.collection__controls {
  display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between;
  gap: var(--space-sm);
  padding-block: var(--space-sm);
  border-block: 1px solid var(--color-border);
  margin-bottom: var(--space-md);
}

.filters { display: flex; flex-wrap: wrap; gap: var(--space-xs); }
.filters__group { position: relative; }
.filters__summary {
  display: inline-flex; align-items: center; gap: var(--space-2xs);
  min-height: 40px; padding-inline: var(--space-sm);
  border: 1px solid var(--color-border-strong);
  border-radius: var(--radius-sm);
  font-size: var(--text-sm);
  cursor: pointer;
  list-style: none;
}
.filters__summary::-webkit-details-marker { display: none; }
.filters__group[open] > .filters__summary { background: var(--color-text); color: var(--color-bg); }
.filters__count {
  display: grid; place-items: center;
  min-width: 18px; height: 18px; padding-inline: 4px;
  border-radius: var(--radius-pill);
  background: var(--color-accent); color: var(--color-cta-text);
  font-size: 11px;
}

/* Popover on pointer devices, inline disclosure on a phone — a floating panel
   at 375px would cover the results it is filtering. */
.filters__list {
  list-style: none; margin: var(--space-2xs) 0 var(--space-xs); padding: 0;
  display: grid; gap: var(--space-2xs);
}
@media (min-width: 48em) {
  .filters__list {
    position: absolute; z-index: 20; top: calc(100% + 4px); left: 0;
    min-width: 14rem;
    margin: 0; padding: var(--space-xs);
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    box-shadow: 0 8px 24px rgb(33 31 28 / 0.08);
  }
}
.filters__label {
  display: grid; grid-template-columns: auto 1fr auto;
  align-items: center; gap: var(--space-xs);
  min-height: 40px; padding-inline: var(--space-2xs);
  font-size: var(--text-sm);
  cursor: pointer;
}
.filters__label input { min-height: auto; accent-color: var(--color-accent); }
.filters__label:has(input:disabled) { opacity: 0.45; cursor: not-allowed; }
.filters__value-count { color: var(--color-text-muted); font-size: var(--text-xs); }

.collection__sort select { min-height: 40px; padding-right: var(--space-md); }
.collection__count { font-size: var(--text-sm); color: var(--color-text-muted); margin-bottom: var(--space-md); }
.collection__grid { margin-bottom: var(--space-lg); }

.pagination {
  display: flex; align-items: center; justify-content: center;
  gap: var(--space-md);
  margin-top: var(--space-lg);
}
.pagination__state { font-size: var(--text-sm); color: var(--color-text-muted); }

/* A grid mid-fetch stays in place and dims, so the page does not jump. */
.collection__grid.is-loading { opacity: 0.5; pointer-events: none; }

/* ----- Bundle builder ------------------------------------------------------ */
.builder { display: grid; gap: var(--space-lg); }

.builder__fieldset { border: 0; padding: 0; margin: 0; }
.builder__options { list-style: none; margin: 0; padding: 0; display: grid; gap: var(--space-sm); }

.builder__option {
  display: grid;
  grid-template-columns: 110px 1fr auto;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-sm);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-surface);
  transition: border-color var(--duration-fast) var(--ease);
}
.builder__option.is-chosen { border-color: var(--color-accent); }

.builder__media { border-radius: var(--radius-sm); overflow: hidden; background: var(--color-band); }
.builder__media img { aspect-ratio: 1 / 1; object-fit: cover; width: 100%; }
.builder__placeholder { background: var(--color-band); aspect-ratio: 1 / 1; }
.builder__meta { min-width: 0; }
.builder__title { margin: 0; font-size: var(--text-sm); font-weight: 500; }
.builder__price { margin: 0; font-size: var(--text-sm); color: var(--color-text-muted); }

.builder__summary {
  align-self: start;
  display: grid; gap: var(--space-sm);
  padding: var(--space-md);
  background: var(--color-band);
  border-radius: var(--radius-md);
}
.builder__summary .label { margin: 0; }

/* Slot pips. Decorative — the same state is in the aria-live progress line. */
.builder__slots { list-style: none; margin: 0; padding: 0; display: flex; gap: var(--space-2xs); }
.builder__slot {
  width: 100%; height: 4px;
  border-radius: var(--radius-pill);
  background: var(--color-band-deep);
  transition: background var(--duration-fast) var(--ease);
}
.builder__slot.is-filled { background: var(--color-accent); }

.builder__progress { margin: 0; font-size: var(--text-sm); color: var(--color-text-muted); }
.builder__note { margin: 0; font-size: var(--text-xs); color: var(--color-text-muted); }

@media (min-width: 60em) {
  .builder { grid-template-columns: 1.5fr 1fr; gap: var(--space-2xl); align-items: start; }
  /* The summary follows while the choices scroll. */
  .builder__summary { position: sticky; top: calc(var(--header-h) + var(--space-md)); }
}