/* ───────────────────────────────────────────────────────────────────────
   product-edit-variants.css   (t-007 · worker-7)
   Variants builder for [data-section="variants"].

   The axis blocks + matrix are generated at runtime by js/product-form.js
   (renderAxisBlocks / renderMatrix), so this partial styles the existing
   pf-* class vocabulary it emits — scoped under the section so nothing leaks:
     toggles  .pf-axis-toggles > label.pf-axis-toggle (input#pfAxisSize / #pfAxisColour, .is-on when active)
     values   .pf-axis-block .pf-axis-block-head .pf-axis-values .pf-axis-add
              .pf-chip .pf-chip-swatch .pf-chip-remove
     bulk     .pf-bulk-bar (#pfBulkBar) with .pf-input fields
     matrix   .pf-matrix-wrap (#pfMatrixWrap) > .pf-variants-empty | table.pf-matrix
              .pf-variant-thumb .pf-variant-thumb-add .pf-input.pf-input-narrow .pf-matrix-summary

   Brand tokens (--terra-*, --ink-*, --canvas*, --radius-*, --shadow-*) come
   from product-edit-base.css; fallbacks included so the partial stands alone.
   Email-only — no contact affordances here.
   ─────────────────────────────────────────────────────────────────────── */

[data-section="variants"] {
  --v-terra:       var(--terra-500, #B8451F);
  --v-terra-600:   var(--terra-600, #9E3818);
  --v-terra-50:    var(--terra-50,  #FBF3EC);
  --v-terra-100:   var(--terra-100, #F6E2D1);
  --v-ink:         var(--ink,        #1A1412);
  --v-ink-soft:    var(--ink-soft,   #3A2F2A);
  --v-ink-muted:   var(--ink-muted,  #7A6F68);
  --v-ink-faint:   var(--ink-faint,  #C9BEB4);
  --v-canvas:      var(--canvas,      #FBF7F1);
  --v-canvas-soft: var(--canvas-soft, #F3EADC);
  --v-border:      rgb(26 20 18 / 0.12);
  --v-radius:      var(--radius-input, 12px);
  --v-radius-card: var(--radius-card, 16px);
  --v-shadow:      var(--shadow-card, 0 2px 8px -2px rgb(26 20 18 / 0.06));
}

/* ── Axis toggles (Size / Colour) — drawn as pill switches ───────────────── */
[data-section="variants"] .pf-axis-toggles {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 18px;
}
[data-section="variants"] .pf-axis-toggle {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 10px 16px 10px 12px;
  min-height: 44px;                 /* touch target */
  background: var(--v-canvas);
  border: 1px solid var(--v-border);
  border-radius: 999px;
  font-size: 0.92rem;
  font-weight: 600;
  color: var(--v-ink-soft);
  cursor: pointer;
  user-select: none;
  transition: background .15s, border-color .15s, color .15s, box-shadow .15s;
}
[data-section="variants"] .pf-axis-toggle:hover { border-color: var(--v-ink-faint); }
[data-section="variants"] .pf-axis-toggle.is-on,
[data-section="variants"] .pf-axis-toggle:has(input:checked) {
  background: var(--v-terra-50);
  border-color: var(--v-terra);
  color: var(--v-terra-600);
}
[data-section="variants"] .pf-axis-toggle:focus-within {
  box-shadow: 0 0 0 3px rgb(184 69 31 / 0.18);
}
/* native checkbox → switch track + knob */
[data-section="variants"] .pf-axis-toggle input[type="checkbox"] {
  appearance: none;
  -webkit-appearance: none;
  position: relative;
  flex-shrink: 0;
  width: 38px;
  height: 22px;
  margin: 0;
  border-radius: 999px;
  background: var(--v-ink-faint);
  cursor: pointer;
  transition: background .18s ease;
}
[data-section="variants"] .pf-axis-toggle input[type="checkbox"]::after {
  content: "";
  position: absolute;
  top: 2px;
  left: 2px;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: #fff;
  box-shadow: 0 1px 2px rgb(26 20 18 / 0.3);
  transition: transform .18s ease;
}
[data-section="variants"] .pf-axis-toggle input[type="checkbox"]:checked {
  background: var(--v-terra);
}
[data-section="variants"] .pf-axis-toggle input[type="checkbox"]:checked::after {
  transform: translateX(16px);
}

/* ── Axis value blocks (chips + add-row) ─────────────────────────────────── */
[data-section="variants"] .pf-axis-block {
  background: var(--v-canvas);
  border: 1px solid var(--v-border);
  border-radius: var(--v-radius-card);
  padding: 16px;
  margin-bottom: 14px;
}
[data-section="variants"] .pf-axis-block-head { margin-bottom: 12px; }
[data-section="variants"] .pf-axis-block-head label {
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--v-ink-muted);
}
[data-section="variants"] .pf-axis-values {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 14px;
}
[data-section="variants"] .pf-axis-values:empty { display: none; }

[data-section="variants"] .pf-chip {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 6px 10px;
  background: #fff;
  border: 1px solid var(--v-border);
  border-radius: 999px;
  font-size: 0.86rem;
  font-weight: 500;
  color: var(--v-ink);
  white-space: nowrap;
}
[data-section="variants"] .pf-chip-swatch {
  width: 16px;
  height: 16px;
  border-radius: 50%;
  border: 1px solid rgb(26 20 18 / 0.18);
  flex-shrink: 0;
}
[data-section="variants"] .pf-chip-remove {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 18px;
  height: 18px;
  margin-left: 2px;
  padding: 0;
  border: 0;
  border-radius: 50%;
  background: var(--v-canvas-soft);
  color: var(--v-ink-muted);
  font-size: 1rem;
  line-height: 1;
  cursor: pointer;
  transition: background .15s, color .15s;
}
[data-section="variants"] .pf-chip-remove:hover {
  background: var(--danger-50, #FEF2F2);
  color: var(--danger-700, #B91C1C);
}

/* add-row: text input [+ colour] + Add button */
[data-section="variants"] .pf-axis-add {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
}
[data-section="variants"] .pf-axis-add .pf-input { flex: 1; min-width: 140px; }
[data-section="variants"] .pf-axis-add input[type="color"] {
  flex-shrink: 0;
  width: 44px;
  height: 44px;
  padding: 2px;
  border: 1px solid var(--v-border);
  border-radius: 10px;
  background: #fff;
  cursor: pointer;
}

/* ── Bulk quick-fill bar ─────────────────────────────────────────────────── */
[data-section="variants"] .pf-bulk-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  padding: 12px 14px;
  margin: 16px 0 12px;
  background: var(--v-terra-50);
  border: 1px solid var(--v-terra-100);
  border-radius: var(--v-radius);
}
[data-section="variants"] .pf-bulk-bar > span {
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--v-ink-soft);
}
[data-section="variants"] .pf-bulk-bar .pf-input {
  flex: 1;
  min-width: 130px;
  max-width: 200px;
}
[data-section="variants"] .pf-bulk-bar[hidden] { display: none; }

/* ── Shared narrow inputs inside the builder ─────────────────────────────── */
[data-section="variants"] .pf-input {
  width: 100%;
  padding: 10px 12px;
  min-height: 44px;
  font: inherit;
  font-size: 0.9rem;
  color: var(--v-ink);
  background: #fff;
  border: 1px solid var(--v-border);
  border-radius: var(--v-radius);
  outline: 0;
  transition: border-color .15s, box-shadow .15s;
}
[data-section="variants"] .pf-input:focus {
  border-color: var(--v-terra);
  box-shadow: 0 0 0 3px rgb(184 69 31 / 0.14);
}
[data-section="variants"] .pf-input-narrow {
  min-height: 40px;
  padding: 8px 10px;
}

/* ── Empty state ─────────────────────────────────────────────────────────── */
[data-section="variants"] .pf-variants-empty {
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 28px 20px;
  margin-top: 4px;
  color: var(--v-ink-muted);
  font-size: 0.9rem;
  line-height: 1.5;
  background: var(--v-canvas);
  border: 1px dashed var(--v-ink-faint);
  border-radius: var(--v-radius-card);
}

/* ── Generated matrix ────────────────────────────────────────────────────── */
[data-section="variants"] .pf-matrix-wrap {
  margin-top: 4px;
  overflow-x: auto;          /* safe fallback on narrow screens */
  -webkit-overflow-scrolling: touch;
}
[data-section="variants"] table.pf-matrix {
  width: 100%;
  border-collapse: separate;
  border-spacing: 0;
  background: #fff;
  border: 1px solid var(--v-border);
  border-radius: var(--v-radius-card);
  overflow: hidden;
  font-size: 0.88rem;
}
[data-section="variants"] .pf-matrix thead th {
  position: sticky;
  top: 0;
  z-index: 1;
  text-align: left;
  padding: 11px 12px;
  background: var(--v-canvas-soft);
  border-bottom: 1px solid var(--v-border);
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.07em;
  text-transform: uppercase;
  color: var(--v-ink-muted);
  white-space: nowrap;
}
[data-section="variants"] .pf-matrix tbody td {
  padding: 9px 12px;
  border-bottom: 1px solid rgb(26 20 18 / 0.07);
  vertical-align: middle;
  color: var(--v-ink-soft);
}
[data-section="variants"] .pf-matrix tbody tr:last-child td { border-bottom: 0; }
[data-section="variants"] .pf-matrix tbody tr:hover td { background: var(--v-terra-50); }

/* per-variant image cell */
[data-section="variants"] .pf-variant-thumb {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 46px;
  height: 46px;
  border-radius: 10px;
  border: 1px solid var(--v-border);
  background: var(--v-canvas);
  overflow: hidden;
  cursor: pointer;
  transition: border-color .15s;
}
[data-section="variants"] .pf-variant-thumb:hover { border-color: var(--v-terra); }
[data-section="variants"] .pf-variant-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}
[data-section="variants"] .pf-variant-thumb-add {
  font-size: 1.4rem;
  line-height: 1;
  color: var(--v-ink-faint);
  font-weight: 300;
}
[data-section="variants"] .pf-variant-thumb input[type="file"] {
  position: absolute;
  width: 1px; height: 1px;
  opacity: 0;
  pointer-events: none;
}

/* summary footer under the matrix */
[data-section="variants"] .pf-matrix-summary {
  display: flex;
  flex-wrap: wrap;
  gap: 18px;
  padding: 12px 4px 2px;
  font-size: 0.84rem;
  color: var(--v-ink-muted);
}
[data-section="variants"] .pf-matrix-summary strong {
  color: var(--v-ink);
  font-weight: 700;
}

/* ── Responsive: stack the matrix into cards on narrow screens ───────────────
   Enhancement — active only when js/product-form.js tags the table with
   [data-cards] and each <td> with data-label (see JS PATCH in results/t-007.md).
   Without the patch the .pf-matrix-wrap simply scrolls horizontally. */
@media (max-width: 600px) {
  [data-section="variants"] .pf-matrix[data-cards] { border: 0; background: transparent; }
  [data-section="variants"] .pf-matrix[data-cards] thead { display: none; }
  [data-section="variants"] .pf-matrix[data-cards] tbody,
  [data-section="variants"] .pf-matrix[data-cards] tr { display: block; }
  [data-section="variants"] .pf-matrix[data-cards] tr {
    margin-bottom: 12px;
    background: #fff;
    border: 1px solid var(--v-border);
    border-radius: var(--v-radius-card);
    padding: 6px 4px;
    box-shadow: var(--v-shadow);
  }
  [data-section="variants"] .pf-matrix[data-cards] td {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 14px;
    border-bottom: 1px solid rgb(26 20 18 / 0.06);
  }
  [data-section="variants"] .pf-matrix[data-cards] tr td:last-child { border-bottom: 0; }
  [data-section="variants"] .pf-matrix[data-cards] td::before {
    content: attr(data-label);
    flex-shrink: 0;
    font-size: 0.68rem;
    font-weight: 700;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    color: var(--v-ink-muted);
  }
  [data-section="variants"] .pf-matrix[data-cards] td .pf-input-narrow { max-width: 60%; }
}