/**
 * Unified Materials System - Styles
 */

/* ========================================
   Materials Grid
   ======================================== */

.materials-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
  padding: 12px;
}

/* Card */
.material-card {
  position: relative;
  width: 100%;
  height: 0;
  padding-bottom: 100%; /* Square aspect ratio */
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  overflow: hidden;
  cursor: pointer;
  transition: all 0.2s ease-in-out;
}

.material-card:hover {
  border-color: var(--accent-color);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(0,0,0,0.2);
}

/* Checkbox */
.material-checkbox {
  position: absolute;
  top: 8px;
  left: 8px;
  z-index: 2;
  width: 18px;
  height: 18px;
  accent-color: #667eea;
  cursor: pointer;
  opacity: 0;
  transition: opacity 0.2s;
}

.material-card:hover .material-checkbox,
.material-checkbox:checked {
  opacity: 1;
}

/* Image */
.material-card img {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  z-index: 1;
}

/* Action Icons */
.material-actions {
  position: absolute;
  top: 8px;
  right: 8px;
  z-index: 2;
  display: flex;
  gap: 4px;
  opacity: 0;
  transform: translateX(10px);
  transition: all 0.2s;
}

.material-card:hover .material-actions {
  opacity: 1;
  transform: translateX(0);
}

.material-actions button {
  width: 28px;
  height: 28px;
  padding: 0;
  border: none;
  border-radius: 6px;
  background: rgba(0,0,0,0.8);
  color: #fff;
  cursor: pointer;
  font-size: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.2s;
}

.material-actions button:hover {
  background: rgba(102,126,234,0.9);
  transform: scale(1.1);
}

/* Info Section */
.material-info {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 2;
  padding: 8px;
  background: linear-gradient(to top, rgba(0,0,0,0.8), rgba(0,0,0,0.4), transparent);
  color: #fff;
}

.material-badges {
  display: flex;
  gap: 4px;
  margin-bottom: 4px;
}

.material-badges span {
  padding: 2px 6px;
  border-radius: 4px;
  font-size: 11px;
  background: rgba(0,0,0,0.6);
}

.source-badge {
  color: #e6b84a;
}

.type-badge {
  color: #667eea;
}

.material-name {
  font-size: 12px;
  font-weight: 600;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.material-sku {
  font-size: 11px;
  color: var(--text-secondary);
}

/* ========================================
   Filters Section
   ======================================== */

.materials-filters {
  display: flex;
  gap: 12px;
  padding: 15px;
  background: var(--bg-tertiary);
  border-radius: 8px;
  border: 1px solid var(--border-color);
  margin-bottom: 15px;
}

.materials-filters select {
  padding: 8px 12px;
  background: var(--input-bg);
  border: 1px solid var(--input-border);
  color: var(--text-primary);
  border-radius: 6px;
  font-size: 14px;
  cursor: pointer;
}

.materials-filters input[type="text"] {
  flex: 1;
  padding: 8px 12px;
  background: var(--input-bg);
  border: 1px solid var(--input-border);
  color: var(--text-primary);
  border-radius: 6px;
  font-size: 14px;
}

/* ========================================
   Bulk Toolbar
   ======================================== */

.bulk-toolbar {
  display: none; /* Hidden by default */
  align-items: center;
  gap: 12px;
  padding: 12px;
  background: var(--bg-tertiary);
  border-radius: 8px;
  border: 1px solid var(--border-color);
  margin: 15px 0;
}

.bulk-toolbar button {
  padding: 8px 16px;
  border: none;
  border-radius: 6px;
  color: #fff;
  cursor: pointer;
  font-weight: 600;
  font-size: 13px;
  display: flex;
  align-items: center;
  gap: 6px;
}

.bulk-toolbar button.select-all {
  background: #374151;
  border: 1px solid #4b5563;
}

.bulk-toolbar button.delete {
  background: linear-gradient(135deg,#ef4444 0%,#dc2626 100%);
}

.bulk-toolbar button.promote {
  background: linear-gradient(135deg,#667eea 0%,#764ba2 100%);
}

/* Selected state */
.material-card.selected {
  border-color: #667eea;
  box-shadow: 0 0 0 2px rgba(102,126,234,0.3);
}

.material-card.selected .material-checkbox {
  opacity: 1;
}

/* ========================================
   Loading State
   ======================================== */

.materials-loading {
  display: none;
  padding: 20px;
  text-align: center;
  color: var(--text-secondary);
}

.materials-loading .spinner {
  width: 24px;
  height: 24px;
  margin: 0 auto 10px;
  border: 3px solid rgba(230,184,74,0.3);
  border-top-color: #e6b84a;
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

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

/* ========================================
   Empty State
   ======================================== */

.empty-state {
  padding: 40px 20px;
  text-align: center;
  color: var(--text-secondary);
}

.empty-state-icon {
  font-size: 32px;
  margin-bottom: 10px;
  opacity: 0.5;
}

/* ========================================
   Responsive Design
   ======================================== */

@media (max-width: 1200px) {
  .materials-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (max-width: 900px) {
  .materials-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .materials-filters {
    flex-wrap: wrap;
  }
  
  .materials-filters input[type="text"] {
    width: 100%;
    order: -1; /* Search on top */
  }
}

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