/* ==========================================================================
   Atelier Papier - Sample Pack Builder Specific Stylesheet
   Sticky Tray, Dynamic Progress Bar, Responsive Grid (4/3/2 col), Bottom Sheet
   ========================================================================== */

.builder-header-area {
  background-color: var(--bg-alt);
  border-bottom: 1px solid var(--border-color);
  padding: 3rem 0 2.5rem;
  text-align: center;
}

.builder-title {
  font-family: var(--font-serif);
  font-size: clamp(2.25rem, 4vw, 3.5rem);
  font-weight: 400;
  color: var(--text-main);
  margin-bottom: 0.75rem;
}

.builder-desc {
  font-size: 1.05rem;
  color: var(--text-muted);
  max-width: 680px;
  margin: 0 auto 2rem;
}

/* Progress Bar Container */
.builder-progress-wrap {
  max-width: 540px;
  margin: 0 auto;
  background: #FFF;
  border: 1px solid var(--border-color);
  padding: 1.25rem 1.5rem;
  border-radius: var(--radius-xs);
}

.progress-info-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 0.65rem;
  font-size: 0.85rem;
}

.progress-message {
  font-weight: 600;
  color: var(--text-main);
}

.progress-message.complete {
  color: var(--sage);
}

.progress-count {
  font-weight: 700;
  letter-spacing: 0.05em;
  color: var(--text-muted);
}

.progress-track {
  width: 100%;
  height: 6px;
  background-color: var(--bg-alt);
  border-radius: var(--radius-pill);
  overflow: hidden;
}

.progress-bar-fill {
  height: 100%;
  background-color: var(--accent);
  width: 0%;
  transition: width 0.35s ease, background-color 0.35s ease;
}

.progress-bar-fill.complete {
  background-color: var(--sage);
}

/* Builder Main Layout */
.builder-layout {
  padding: 2.5rem 0 5rem;
  position: relative;
}

.builder-grid-container {
  display: grid;
  grid-template-columns: 1fr 340px;
  gap: 2.5rem;
  align-items: start;
}

@media (max-width: 1100px) {
  .builder-grid-container {
    grid-template-columns: 1fr;
  }
  .builder-tray-desktop {
    display: none !important;
  }
}

/* Filter Bar */
.filter-bar {
  background: #FFF;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xs);
  padding: 1.25rem 1.5rem;
  margin-bottom: 2rem;
}

.filter-row-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  flex-wrap: wrap;
  margin-bottom: 1.25rem;
  padding-bottom: 1.25rem;
  border-bottom: 1px solid var(--border-color);
}

.search-box-wrap {
  position: relative;
  flex: 1;
  min-width: 260px;
}

.search-box-wrap input {
  width: 100%;
  padding: 0.65rem 1rem 0.65rem 2.5rem;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xs);
  font-size: 0.875rem;
  background-color: var(--bg-subtle);
  transition: var(--transition);
}

.search-box-wrap input:focus {
  outline: none;
  border-color: var(--text-main);
  background: #FFF;
}

.search-icon {
  position: absolute;
  left: 0.85rem;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-light);
  pointer-events: none;
}

.filter-selectors {
  display: flex;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
}

.filter-select {
  padding: 0.65rem 2rem 0.65rem 0.85rem;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xs);
  background: #FFF url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%231B1B1B' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E") no-repeat right 0.75rem center;
  font-size: 0.8125rem;
  appearance: none;
  cursor: pointer;
}

.filter-pills-row {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  overflow-x: auto;
  padding-bottom: 0.4rem;
  scrollbar-width: thin;
}

.filter-pill {
  padding: 0.4rem 1rem;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-pill);
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--text-main);
  background: #FFF;
  cursor: pointer;
  white-space: nowrap;
  transition: var(--transition);
}

.filter-pill:hover,
.filter-pill.active {
  background: var(--text-main);
  color: #FFF;
  border-color: var(--text-main);
}

.filter-color-dots {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-left: auto;
}

.color-filter-btn {
  width: 22px;
  height: 22px;
  border-radius: 50%;
  border: 2px solid transparent;
  cursor: pointer;
  transition: transform 0.2s ease, border-color 0.2s ease;
  position: relative;
}

.color-filter-btn.active {
  border-color: var(--text-main);
  transform: scale(1.15);
}

.mobile-filter-trigger {
  display: none;
  width: 100%;
  margin-bottom: 1.5rem;
}

@media (max-width: 900px) {
  .filter-bar {
    display: none;
  }
  .mobile-filter-trigger {
    display: flex;
    justify-content: space-between;
    align-items: center;
  }
}

/* Products Grid (Desktop 4 col, Tablet 3/2, Mobile 2 col) */
.builder-products-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5rem;
}

@media (max-width: 1400px) {
  .builder-products-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (max-width: 992px) {
  .builder-products-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 1.25rem;
  }
}

@media (max-width: 576px) {
  .builder-products-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 0.75rem;
  }
  .product-details {
    padding: 0.85rem;
  }
  .product-name {
    font-size: 0.95rem;
  }
  .sample-price-val {
    font-size: 0.95rem;
  }
  .btn-add-sample {
    padding: 0.55rem 0.4rem;
    font-size: 0.725rem;
  }
}

/* Desktop Sticky Tray */
.builder-tray-desktop {
  position: sticky;
  top: calc(var(--header-height) + 1.5rem);
  background: #FFF;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xs);
  padding: 1.5rem;
  box-shadow: 0 10px 30px rgba(0,0,0,0.03);
  max-height: calc(100vh - var(--header-height) - 3rem);
  display: flex;
  flex-direction: column;
}

.tray-title-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--border-color);
  margin-bottom: 1rem;
}

.tray-title {
  font-family: var(--font-serif);
  font-size: 1.35rem;
  font-weight: 500;
  color: var(--text-main);
}

.tray-count-pill {
  font-size: 0.75rem;
  font-weight: 600;
  background: var(--bg-alt);
  padding: 0.25rem 0.65rem;
  border-radius: var(--radius-pill);
  color: var(--text-main);
}

.tray-items-list {
  flex-grow: 1;
  overflow-y: auto;
  padding-right: 0.5rem;
  margin-bottom: 1rem;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  max-height: 280px;
}

.tray-item {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.5rem;
  background: var(--bg-alt);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xs);
  animation: fadeInItem 0.25s ease;
}

@keyframes fadeInItem {
  from { opacity: 0; transform: scale(0.96); }
  to { opacity: 1; transform: scale(1); }
}

.tray-item-thumb {
  width: 48px;
  height: 48px;
  object-fit: cover;
  border-radius: var(--radius-xs);
  background: #FFF;
  flex-shrink: 0;
}

.tray-item-info {
  flex-grow: 1;
  min-width: 0;
}

.tray-item-name {
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--text-main);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.tray-item-price {
  font-size: 0.75rem;
  color: var(--text-muted);
}

.tray-item-remove {
  background: none;
  border: none;
  color: var(--text-light);
  padding: 4px;
  font-size: 1.1rem;
  line-height: 1;
  cursor: pointer;
  transition: color 0.2s ease;
}

.tray-item-remove:hover {
  color: #C0392B;
}

.tray-empty-state {
  text-align: center;
  padding: 2.5rem 1rem;
  color: var(--text-muted);
  font-size: 0.875rem;
}

/* Pricing Breakdown */
.tray-pricing-box {
  padding-top: 1rem;
  border-top: 1px solid var(--border-color);
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  margin-bottom: 1.25rem;
}

.tray-pricing-row {
  display: flex;
  justify-content: space-between;
  font-size: 0.875rem;
  color: var(--text-muted);
}

.tray-pricing-row.discount {
  color: var(--accent);
  font-weight: 600;
}

.tray-pricing-row.total {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text-main);
  padding-top: 0.5rem;
  border-top: 1px dashed var(--border-color);
}

/* Mobile Sticky Bottom Bar */
.mobile-sticky-sample-bar {
  display: none;
  position: fixed;
  bottom: 0;
  left: 0;
  width: 100%;
  background: #FFF;
  border-top: 1px solid var(--border-color);
  padding: 0.75rem 1.25rem;
  z-index: 850;
  box-shadow: 0 -5px 20px rgba(0,0,0,0.06);
}

.mobile-sticky-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.mobile-bar-summary {
  display: flex;
  flex-direction: column;
}

.mobile-bar-count {
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--text-main);
}

.mobile-bar-total {
  font-size: 0.8rem;
  color: var(--text-muted);
}

@media (max-width: 1100px) {
  .mobile-sticky-sample-bar {
    display: block;
  }
}

/* Mobile Bottom Sheet Drawer */
.bottom-sheet-backdrop {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0,0,0,0.5);
  backdrop-filter: blur(3px);
  z-index: 1200;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.3s ease, visibility 0.3s ease;
}

.bottom-sheet-backdrop.open {
  opacity: 1;
  visibility: visible;
}

.bottom-sheet-content {
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  max-height: 85vh;
  background: #FFF;
  border-top-left-radius: 16px;
  border-top-right-radius: 16px;
  padding: 1.5rem;
  transform: translateY(100%);
  transition: transform 0.35s cubic-bezier(0.16, 1, 0.3, 1);
  display: flex;
  flex-direction: column;
  overflow-y: auto;
}

.bottom-sheet-backdrop.open .bottom-sheet-content {
  transform: translateY(0);
}

.bottom-sheet-handle {
  width: 40px;
  height: 4px;
  background-color: var(--border-color);
  border-radius: 2px;
  margin: 0 auto 1.25rem;
}

.bottom-sheet-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--border-color);
  margin-bottom: 1rem;
}