* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background: #f0f2f5;
  color: #333;
  overflow: hidden;
  height: 100vh;
}

html {
  overflow: hidden;
  height: 100vh;
}

/* Header */
header {
  background: #1a1a2e;
  color: white;
  padding: 24px 30px;
  text-align: center;
}

header h1 {
  font-size: 24px;
  font-weight: 600;
}

.subtitle {
  margin-top: 6px;
  font-size: 14px;
  color: rgba(255,255,255,0.6);
}

/* Catalog Grid */
.catalog-grid {
  display: flex;
  gap: 24px;
  padding: 40px;
  max-width: 1100px;
  margin: 0 auto;
  justify-content: center;
  flex-wrap: wrap;
}

.catalog-card {
  background: white;
  border-radius: 12px;
  overflow: hidden;
  cursor: pointer;
  transition: transform 0.2s, box-shadow 0.2s;
  box-shadow: 0 2px 8px rgba(0,0,0,0.1);
  width: 480px;
}

.catalog-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 30px rgba(0,0,0,0.18);
}

.catalog-card img {
  width: 100%;
  display: block;
}

.catalog-card .card-label {
  padding: 14px 16px;
  font-size: 15px;
  font-weight: 600;
  text-align: center;
  color: #1a1a2e;
}

#catalog-view {
  height: 100vh;
  overflow-y: auto;
}

.hidden {
  display: none !important;
}

/* Detail View */
#detail-view {
  height: 100vh;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.detail-header {
  background: #1a1a2e;
  color: white;
  padding: 10px 20px;
  display: flex;
  align-items: center;
  gap: 16px;
  flex-shrink: 0;
}

.detail-body {
  flex: 1;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.detail-header h2 {
  font-size: 18px;
  font-weight: 500;
}

#back-btn {
  background: rgba(255,255,255,0.15);
  color: white;
  border: none;
  padding: 8px 16px;
  font-size: 14px;
  cursor: pointer;
  border-radius: 6px;
  transition: background 0.2s;
}

#back-btn:hover {
  background: rgba(255,255,255,0.25);
}

/* Color Bar */
.color-bar {
  background: white;
  padding: 8px 16px;
  display: flex;
  align-items: center;
  gap: 10px;
  box-shadow: 0 1px 4px rgba(0,0,0,0.1);
  flex-wrap: wrap;
}

.color-bar label {
  font-size: 13px;
  color: #666;
  white-space: nowrap;
}

#color-picker, #color-picker-2 {
  width: 50px;
  height: 36px;
  border: none;
  border-radius: 6px;
  cursor: pointer;
  padding: 2px;
}

.picker-group {
  display: flex;
  align-items: center;
  gap: 8px;
}

.picker-divider {
  width: 1px;
  height: 36px;
  background: #ddd;
  margin: 0 4px;
}

.preset-colors {
  display: flex;
  gap: 6px;
  align-items: center;
}

.preset {
  width: 26px;
  height: 26px;
  border-radius: 50%;
  cursor: pointer;
  border: 2px solid transparent;
  transition: border-color 0.2s, transform 0.15s;
}

.preset:hover {
  border-color: #333;
  transform: scale(1.2);
}

.dropdown-group {
  display: flex;
  align-items: center;
  gap: 6px;
}

.dropdown-group select {
  padding: 6px 10px;
  border: 1px solid #ccc;
  border-radius: 6px;
  font-size: 12px;
  background: white;
  cursor: pointer;
}

#reset-btn {
  padding: 8px 16px;
  background: #eee;
  border: 1px solid #ddd;
  border-radius: 6px;
  cursor: pointer;
  font-size: 13px;
  margin-left: auto;
  transition: background 0.2s;
}

#reset-btn:hover {
  background: #ddd;
}

/* Canvas */
.canvas-wrap {
  background: #e8eaed;
  flex: 1;
  overflow: hidden;
  display: flex;
  justify-content: center;
  align-items: center;
}

#catalog-canvas {
  box-shadow: 0 4px 20px rgba(0,0,0,0.2);
  border-radius: 4px;
}

/* Loading indicator */
.loading {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 60px;
  font-size: 16px;
  color: #999;
}

/* Responsive */
@media (max-width: 600px) {
  .catalog-grid {
    padding: 16px;
  }
  .catalog-card {
    width: 100%;
  }
  .color-bar {
    gap: 8px;
    padding: 10px 12px;
  }
  .preset {
    width: 26px;
    height: 26px;
  }
}