/* ==========================================================================
   Product Customiser — front-end styles
   Loaded only on product pages where the customiser is active.
   Uses CSS custom properties so themes can easily override.
   ========================================================================== */

:root {
  --pc-primary:       #2271b1;
  --pc-primary-hover: #135e96;
  --pc-accent:        #d63638;
  --pc-bg:            #f6f7f7;
  --pc-border:        #c3c4c7;
  --pc-radius:        6px;
  --pc-font:          -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --pc-shadow:        0 1px 4px rgba(0, 0, 0, .12);
  --pc-transition:    200ms ease;
}

/* ── Container ─────────────────────────────────────────────────────────── */

.pc-customiser {
  font-family: var(--pc-font);
  margin: 1.5rem 0;
  padding: 1.25rem 1.5rem;
  background: var(--pc-bg);
  border: 1px solid var(--pc-border);
  border-radius: var(--pc-radius);
  box-shadow: var(--pc-shadow);
}

.pc-customiser__title {
  margin: 0 0 1rem;
  font-size: 1rem;
  font-weight: 600;
  color: #1d2327;
}

/* ── Category / mode tab strip ─────────────────────────────────────────── */

.pc-tab-strip {
  display: flex;
  flex-wrap: wrap;
  gap: .375rem;
  margin-bottom: 1.25rem;
  padding-bottom: .75rem;
  border-bottom: 1px solid var(--pc-border);
}

.pc-tab {
  padding: .4rem .9rem;
  font-size: .875rem;
  font-weight: 500;
  color: #50575e;
  background: #fff;
  border: 1px solid var(--pc-border);
  border-radius: 3px;
  cursor: pointer;
  transition: background var(--pc-transition), color var(--pc-transition), border-color var(--pc-transition);
}

.pc-tab:hover {
  background: #f0f0f1;
  border-color: #8c8f94;
}

.pc-tab--active {
  color: #fff;
  background: var(--pc-primary);
  border-color: var(--pc-primary);
}

/* ── Form ──────────────────────────────────────────────────────────────── */

.pc-form {
  display: grid;
  gap: 1rem;
}

.pc-field {
  display: flex;
  flex-direction: column;
  gap: .3rem;
}

.pc-field__label {
  font-size: .875rem;
  font-weight: 600;
  color: #1d2327;
}

.pc-field__label--required::after {
  content: " *";
  color: var(--pc-accent);
}

.pc-field__input,
.pc-field__select,
.pc-field__textarea {
  width: 100%;
  padding: .5rem .75rem;
  font-size: .9375rem;
  font-family: var(--pc-font);
  color: #1d2327;
  background: #fff;
  border: 1px solid var(--pc-border);
  border-radius: var(--pc-radius);
  transition: border-color var(--pc-transition), box-shadow var(--pc-transition);
  box-sizing: border-box;
}

.pc-field__input:focus,
.pc-field__select:focus,
.pc-field__textarea:focus {
  outline: none;
  border-color: var(--pc-primary);
  box-shadow: 0 0 0 2px rgba(34, 113, 177, .25);
}

.pc-field__input--error,
.pc-field__select--error,
.pc-field__textarea--error {
  border-color: var(--pc-accent);
}

.pc-field__error {
  font-size: .8125rem;
  color: var(--pc-accent);
}

.pc-field__hint {
  font-size: .8125rem;
  color: #787c82;
}

.pc-field__unit {
  display: flex;
  align-items: center;
  gap: .5rem;
}

.pc-field__unit-label {
  font-size: .875rem;
  color: #50575e;
  white-space: nowrap;
}

.pc-field__textarea {
  resize: vertical;
  min-height: 80px;
}

/* ── Unit toggle ───────────────────────────────────────────────────────── */

.pc-unit-toggle {
  display: inline-flex;
  gap: 0;
  border: 1px solid var(--pc-border);
  border-radius: var(--pc-radius);
  overflow: hidden;
}

.pc-unit-toggle__btn {
  padding: .35rem .8rem;
  font-size: .8125rem;
  font-weight: 500;
  background: #fff;
  color: #50575e;
  border: none;
  cursor: pointer;
  transition: background var(--pc-transition), color var(--pc-transition);
}

.pc-unit-toggle__btn--active {
  background: var(--pc-primary);
  color: #fff;
}

/* ── Coverage result ───────────────────────────────────────────────────── */

.pc-result {
  margin-top: 1.25rem;
  padding: 1rem 1.25rem;
  background: #f0f6fc;
  border: 1px solid #c2dbf1;
  border-radius: var(--pc-radius);
}

.pc-result__summary {
  font-size: 1rem;
  font-weight: 600;
  color: var(--pc-primary);
  margin: 0 0 .75rem;
}

.pc-result__items {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
  gap: .4rem .75rem;
}

.pc-result__item {
  display: flex;
  flex-direction: column;
}

.pc-result__label {
  font-size: .75rem;
  color: #787c82;
  text-transform: uppercase;
  letter-spacing: .04em;
}

.pc-result__value {
  font-size: .9375rem;
  font-weight: 600;
  color: #1d2327;
}

/* ── Add extra surfaces (renovation) ──────────────────────────────────── */

.pc-surface-list {
  display: flex;
  flex-direction: column;
  gap: .75rem;
}

.pc-surface-row {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr auto;
  gap: .5rem;
  align-items: end;
}

.pc-surface-row__remove {
  padding: .45rem .6rem;
  font-size: 1rem;
  line-height: 1;
  background: transparent;
  border: 1px solid var(--pc-border);
  border-radius: var(--pc-radius);
  color: var(--pc-accent);
  cursor: pointer;
}

.pc-add-surface-btn {
  margin-top: .5rem;
  padding: .4rem .85rem;
  font-size: .875rem;
  color: var(--pc-primary);
  background: #fff;
  border: 1px dashed var(--pc-primary);
  border-radius: var(--pc-radius);
  cursor: pointer;
}

/* ── File upload zone ──────────────────────────────────────────────────── */

.pc-upload-zone {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: .5rem;
  padding: 1.5rem;
  background: #fff;
  border: 2px dashed var(--pc-border);
  border-radius: var(--pc-radius);
  text-align: center;
  cursor: pointer;
  transition: border-color var(--pc-transition), background var(--pc-transition);
}

.pc-upload-zone:hover,
.pc-upload-zone--dragging {
  border-color: var(--pc-primary);
  background: #f0f6fc;
}

.pc-upload-zone__icon {
  font-size: 2rem;
  line-height: 1;
}

.pc-upload-zone__text {
  font-size: .875rem;
  color: #50575e;
}

.pc-upload-zone__hint {
  font-size: .75rem;
  color: #787c82;
}

.pc-upload-preview {
  display: flex;
  flex-wrap: wrap;
  gap: .5rem;
  margin-top: .75rem;
}

.pc-upload-preview__item {
  position: relative;
  width: 72px;
  height: 72px;
  border-radius: 4px;
  overflow: hidden;
  border: 1px solid var(--pc-border);
}

.pc-upload-preview__item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.pc-upload-preview__remove {
  position: absolute;
  top: 2px;
  right: 2px;
  width: 18px;
  height: 18px;
  font-size: 11px;
  line-height: 18px;
  text-align: center;
  background: rgba(0,0,0,.55);
  color: #fff;
  border: none;
  border-radius: 50%;
  cursor: pointer;
}

/* ── AI Visualiser ─────────────────────────────────────────────────────── */

.pc-visualiser {
  margin-top: 1.5rem;
}

.pc-visualiser__toggle {
  display: flex;
  align-items: center;
  gap: .5rem;
  padding: .65rem 1.25rem;
  font-size: .9375rem;
  font-weight: 600;
  color: #fff;
  background: #2c7a4b;
  border: none;
  border-radius: var(--pc-radius);
  cursor: pointer;
  transition: background var(--pc-transition);
}

.pc-visualiser__toggle:hover {
  background: #235d39;
}

.pc-visualiser__panel {
  margin-top: 1rem;
  padding: 1rem 1.25rem;
  background: #fff;
  border: 1px solid var(--pc-border);
  border-radius: var(--pc-radius);
}

.pc-visualiser__source-btns {
  display: flex;
  gap: .5rem;
  margin-bottom: 1rem;
}

.pc-visualiser__source-btn {
  flex: 1;
  padding: .6rem;
  font-size: .9rem;
  background: var(--pc-bg);
  border: 1px solid var(--pc-border);
  border-radius: var(--pc-radius);
  cursor: pointer;
  transition: background var(--pc-transition), border-color var(--pc-transition);
}

.pc-visualiser__source-btn--active {
  background: #e8f0fe;
  border-color: var(--pc-primary);
  color: var(--pc-primary);
  font-weight: 600;
}

.pc-canvas-wrap {
  position: relative;
  width: 100%;
  background: #000;
  border-radius: 4px;
  overflow: hidden;
}

.pc-canvas-wrap canvas,
.pc-canvas-wrap video {
  display: block;
  width: 100%;
  height: auto;
}

.pc-visualiser__status {
  font-size: .875rem;
  color: #50575e;
  margin-top: .5rem;
  min-height: 1.25rem;
}

.pc-visualiser__actions {
  display: flex;
  gap: .5rem;
  margin-top: .75rem;
  flex-wrap: wrap;
}

.pc-btn {
  display: inline-flex;
  align-items: center;
  gap: .35rem;
  padding: .55rem 1.1rem;
  font-size: .9rem;
  font-weight: 500;
  border-radius: var(--pc-radius);
  border: 1px solid transparent;
  cursor: pointer;
  transition: background var(--pc-transition), border-color var(--pc-transition), color var(--pc-transition);
}

.pc-btn--primary {
  background: var(--pc-primary);
  color: #fff;
}
.pc-btn--primary:hover {
  background: var(--pc-primary-hover);
}

.pc-btn--ghost {
  background: transparent;
  color: var(--pc-primary);
  border-color: var(--pc-primary);
}
.pc-btn--ghost:hover {
  background: #f0f6fc;
}

.pc-btn--danger {
  background: transparent;
  color: var(--pc-accent);
  border-color: var(--pc-accent);
}

.pc-btn:disabled {
  opacity: .55;
  cursor: not-allowed;
}

/* ── Spinner ───────────────────────────────────────────────────────────── */

.pc-spinner {
  display: inline-block;
  width: 1em;
  height: 1em;
  border: 2px solid currentColor;
  border-top-color: transparent;
  border-radius: 50%;
  animation: pc-spin .65s linear infinite;
}

@keyframes pc-spin {
  to { transform: rotate(360deg); }
}

/* ── Responsive ────────────────────────────────────────────────────────── */

@media ( max-width: 600px ) {
  .pc-surface-row {
    grid-template-columns: 1fr 1fr;
  }

  .pc-surface-row__remove {
    grid-column: span 2;
    justify-self: end;
  }

  .pc-result__items {
    grid-template-columns: 1fr 1fr;
  }
}

/* ── No-script notice ──────────────────────────────────────────────────── */

.pc-noscript-notice {
  padding: .75rem 1rem;
  background: #fcf0c7;
  border: 1px solid #e6c200;
  border-radius: var(--pc-radius);
  font-size: .9rem;
  color: #50575e;
}