:root {
  --color-bg: #f5f6f8;
  --color-surface: #ffffff;
  --color-border: #e2e5ea;
  --color-text: #1c1e21;
  --color-text-muted: #6b7280;
  --color-primary: #2563eb;
  --color-primary-dark: #1d4ed8;
  --radius: 12px;
  --shadow: 0 1px 3px rgba(0, 0, 0, 0.08), 0 1px 2px rgba(0, 0, 0, 0.06);
  color-scheme: light;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Hiragino Sans", "Noto Sans JP", sans-serif;
  background: var(--color-bg);
  color: var(--color-text);
  -webkit-font-smoothing: antialiased;
}

.app-header {
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  padding: 20px 16px 14px;
  text-align: center;
  position: sticky;
  top: 0;
  z-index: 10;
}

.app-header h1 {
  margin: 0;
  font-size: 1.4rem;
}

.subtitle {
  margin: 4px 0 0;
  color: var(--color-text-muted);
  font-size: 0.85rem;
}

.container {
  max-width: 1080px;
  margin: 0 auto;
  padding: 16px;
}

.toolbar {
  display: flex;
  gap: 8px;
  margin-bottom: 12px;
}

#search-input {
  flex: 1;
  padding: 10px 14px;
  font-size: 1rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  background: var(--color-surface);
  color: var(--color-text);
  min-width: 0;
}

#search-input:focus {
  outline: 2px solid var(--color-primary);
  outline-offset: -1px;
}

#refresh-btn {
  padding: 10px 16px;
  font-size: 0.95rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  background: var(--color-surface);
  color: var(--color-text);
  cursor: pointer;
  white-space: nowrap;
}

#refresh-btn:active {
  background: var(--color-bg);
}

.status {
  padding: 12px 14px;
  border-radius: var(--radius);
  margin-bottom: 12px;
  font-size: 0.9rem;
}

.status.loading {
  background: #eef2ff;
  color: #3730a3;
}

.status.error {
  background: #fef2f2;
  color: #b91c1c;
}

.item-count {
  color: var(--color-text-muted);
  font-size: 0.85rem;
  margin-bottom: 10px;
}

.item-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 14px;
}

.item-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  overflow: hidden;
  cursor: pointer;
  box-shadow: var(--shadow);
  display: flex;
  flex-direction: column;
  transition: transform 0.15s ease;
}

.item-card:active {
  transform: scale(0.98);
}

.item-photo {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  background: var(--color-bg);
  display: block;
}

.item-photo-placeholder {
  width: 100%;
  aspect-ratio: 4 / 3;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-bg);
  color: var(--color-text-muted);
  font-size: 2rem;
}

.item-body {
  padding: 10px 12px 12px;
}

.item-name {
  margin: 0 0 6px;
  font-size: 1rem;
  font-weight: 600;
}

.item-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  font-size: 0.8rem;
  color: var(--color-text-muted);
}

.item-meta .tag {
  background: var(--color-bg);
  border-radius: 999px;
  padding: 3px 9px;
}

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

.modal {
  position: fixed;
  inset: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 16px;
}

.modal[hidden] {
  display: none;
}

.modal-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.55);
}

.modal-content {
  position: relative;
  background: var(--color-surface);
  border-radius: var(--radius);
  max-width: 560px;
  width: 100%;
  max-height: 90vh;
  overflow-y: auto;
  padding: 16px;
}

.modal-close {
  position: absolute;
  top: 10px;
  right: 10px;
  border: none;
  background: rgba(0, 0, 0, 0.08);
  border-radius: 50%;
  width: 32px;
  height: 32px;
  font-size: 1rem;
  cursor: pointer;
  z-index: 1;
}

.modal-images {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  margin-bottom: 12px;
  border-radius: 8px;
}

.modal-images img {
  width: 100%;
  max-height: 320px;
  object-fit: contain;
  border-radius: 8px;
  background: var(--color-bg);
  flex-shrink: 0;
}

.modal-content h2 {
  margin: 0 0 10px;
}

.modal-meta {
  margin: 0;
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 6px 12px;
  font-size: 0.9rem;
}

.modal-meta dt {
  color: var(--color-text-muted);
  font-weight: 600;
}

.modal-meta dd {
  margin: 0;
}

@media (prefers-color-scheme: dark) {
  :root {
    --color-bg: #17181a;
    --color-surface: #232426;
    --color-border: #34363a;
    --color-text: #f1f1f1;
    --color-text-muted: #9aa0a6;
    color-scheme: dark;
  }

  .status.loading {
    background: #1e2240;
    color: #a5b4fc;
  }

  .status.error {
    background: #3a1f1f;
    color: #fca5a5;
  }

  .modal-close {
    background: rgba(255, 255, 255, 0.15);
    color: #fff;
  }
}

@media (max-width: 420px) {
  .app-header h1 {
    font-size: 1.2rem;
  }

  .item-grid {
    grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
    gap: 10px;
  }
}