:root {
  color-scheme: light dark;
  --bg: #f7f7f9;
  --card: #ffffff;
  --border: #d9d9e0;
  --text: #22223b;
  --muted: #4a4a68;
  --accent: #5b5eea;
  --accent-strong: #4043c3;
  --danger: #ff5f5f;
  --shadow: 0 12px 24px -18px rgba(34, 34, 59, 0.4);
  --category-apparel-bg: #eef2ff;
  --category-apparel-border: #b6c2ff;
  --category-sticker-bg: #e9fff3;
  --category-sticker-border: #9ce2b8;
  --category-badge-bg: #fff5e9;
  --category-badge-border: #f5c48b;
  --category-media-bg: #f0faff;
  --category-media-border: #9fd4f7;
  --category-donation-bg: #fff0f6;
  --category-donation-border: #f79ac5;
  --category-goods-bg: #f4f7ef;
  --category-goods-border: #c3d0a4;
  --category-custom-bg: #f2f2f6;
  --category-custom-border: #c6c6d1;
  font-size: 16px;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: 'Inter', 'Hiragino Sans', 'Noto Sans JP', system-ui, -apple-system,
    BlinkMacSystemFont, 'Segoe UI', sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  padding-bottom: 10rem;
}

.app-grid {
  display: grid;
  gap: 1rem;
  padding: 1rem 3vw 2rem;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  align-items: start;
}

.card {
  background: var(--card);
  border-radius: 20px;
  border: 1px solid var(--border);
  padding: 1.1rem;
  box-shadow: var(--shadow);
}

.card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 0.75rem;
}

.card-header h2 {
  margin: 0;
  font-size: 1.2rem;
}

.inventory-list {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
  gap: 0.6rem;
  margin-bottom: 1rem;
}

.inventory-item {
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
  padding: 0.55rem 0.65rem 0.7rem;
  border-radius: 14px;
  border: 1px solid var(--border);
  background: rgba(91, 94, 234, 0.05);
}

.inventory-item .item-category {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  padding: 0.2rem 0.5rem;
  border-radius: 999px;
  font-size: 0.75rem;
  font-weight: 600;
  background: rgba(34, 34, 59, 0.08);
  color: var(--muted);
}

.inventory-item .item-meta {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.item-name {
  margin: 0;
  font-size: 0.98rem;
}

.item-detail {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  font-size: 0.82rem;
  color: var(--muted);
  align-items: center;
}

.item-detail .item-stock {
  font-weight: 600;
  color: var(--text);
  font-size: 0.85rem;
  padding: 0.1rem 0.4rem;
  border-radius: 0.6rem;
  background: rgba(34, 34, 59, 0.08);
}

.item-actions {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
  font-size: 1.05rem;
  margin-top: 0.1rem;
}

.item-actions.compact {
  font-size: 1rem;
}

.item-cart-count {
  min-width: 2rem;
  text-align: center;
  font-weight: 600;
}

button {
  border: none;
  border-radius: 999px;
  padding: 0.4rem 1rem;
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  transition: transform 0.15s ease, box-shadow 0.15s ease;
  background: #e4e4f1;
  color: #1f1f3a;
}

button:hover {
  transform: translateY(-1px);
  box-shadow: 0 6px 18px -12px rgba(31, 31, 58, 0.8);
}

button.primary {
  background: var(--accent);
  color: #fff;
}

button.primary:hover {
  background: var(--accent-strong);
}

button.secondary {
  background: #dfe1ff;
  color: #2f2f63;
}

button.secondary:hover {
  background: #c7caff;
}

button.ghost {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--muted);
}

button.ghost:hover {
  border-color: var(--accent);
  color: var(--accent-strong);
}

label {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  font-size: 0.85rem;
  font-weight: 600;
}

input[type='text'],
input[type='number'] {
  padding: 0.5rem 0.6rem;
  border-radius: 0.75rem;
  border: 1px solid var(--border);
  background: #fff;
  font-size: 0.95rem;
}

.cart-card {
  position: fixed;
  left: 0;
  right: 0;
  bottom: 0;
  border-radius: 18px 18px 0 0;
  border-top: 1px solid var(--border);
  border-bottom: none;
  box-shadow: 0 -16px 32px -24px rgba(34, 34, 59, 0.6);
  padding: 0.75rem 1.25rem 1rem;
  display: flex;
  flex-direction: column;
  backdrop-filter: blur(6px);
  z-index: 900;
  background: rgba(255, 255, 255, 0.94);
}

.cart-card .card-header {
  gap: 0.75rem;
  flex-wrap: wrap;
  margin-bottom: 0.5rem;
}

.cart-header-main,
.cart-header-actions {
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

.cart-header-main {
  flex: 1 1 auto;
}

.cart-header-actions {
  flex: 0 0 auto;
}

.cart-total-compact {
  display: none;
  font-size: 1rem;
  color: var(--text);
}

.cart-card button.cart-toggle {
  padding: 0.3rem 0.9rem;
}

.cart-card button:not(.cart-toggle) {
  padding: 0.35rem 0.9rem;
}

.cart-collapsible {
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}

.cart-card.collapsed {
  padding-bottom: 0.75rem;
}

.cart-card.collapsed .cart-collapsible {
  display: none;
}

.cart-card.collapsed .cart-total-compact {
  display: inline-flex;
}

.cart-items {
  max-height: 20vh;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  margin: 0.5rem 0;
  padding-right: 0.35rem;
}

.cart-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 0.6rem 0.9rem;
  background: rgba(31, 31, 58, 0.05);
}

.cart-item h4 {
  margin: 0;
}

.cart-item-price {
  display: block;
  font-size: 0.85rem;
  color: var(--muted);
}

.cart-footer {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  border-top: 1px dashed var(--border);
  padding-top: 0.65rem;
}

.cart-actions {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
  gap: 0.4rem;
}

.cart-total {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  font-size: 1.1rem;
}

.cart-total strong {
  font-size: 1.35rem;
}

.summary {
  display: grid;
  gap: 0.6rem;
  grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
  margin: 0 0 1rem;
}

.summary dt {
  font-size: 0.8rem;
  color: var(--muted);
}

.summary dd {
  margin: 0.2rem 0 0;
  font-size: 1.2rem;
  font-weight: 700;
}

.list-title {
  margin: 0 0 0.75rem;
  font-size: 1rem;
}

.transactions {
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
  max-height: 220px;
  overflow-y: auto;
  padding-right: 0.35rem;
}

.transaction {
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 0.6rem 0.8rem;
  background: rgba(64, 67, 195, 0.07);
}

.transaction-header {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  font-size: 0.95rem;
}

.transaction-items {
  margin: 0.5rem 0 0;
  padding-left: 1.2rem;
  color: var(--muted);
}

.tag {
  background: rgba(91, 94, 234, 0.15);
  color: var(--accent-strong);
  padding: 0.2rem 0.6rem;
  border-radius: 999px;
  font-size: 0.8rem;
}

.cart-card .tag {
  background: rgba(255, 255, 255, 0.25);
  color: var(--text);
}

.modal {
  position: fixed;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1rem;
  background: rgba(22, 22, 45, 0.6);
  backdrop-filter: blur(6px);
  z-index: 999;
}

.modal.hidden {
  display: none;
}

.modal-content {
  width: min(720px, 92vw);
  background: var(--card);
  border-radius: 20px;
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
  display: flex;
  flex-direction: column;
  color: var(--text);
}

.modal-header,
.modal-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 1.25rem;
  border-bottom: 1px solid var(--border);
}

.modal-footer {
  border-top: 1px solid var(--border);
  border-bottom: none;
}

.modal-body {
  padding: 1rem 1.25rem 0.5rem;
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.editor-table {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  max-height: 420px;
  overflow-y: auto;
}

.editor-toolbar {
  display: flex;
  justify-content: flex-end;
  margin-bottom: 0.5rem;
}

.editor-row {
  display: grid;
  gap: 0.5rem;
  grid-template-columns: 2fr 0.9fr 0.9fr 1.1fr auto;
  align-items: flex-start;
}

.editor-row label {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--text);
}

.editor-actions {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  align-items: stretch;
}

.editor-actions button {
  padding: 0.25rem 0.6rem;
  font-size: 0.75rem;
  line-height: 1.2;
}

.editor-row input,
.editor-row select {
  width: 100%;
  padding: 0.45rem 0.6rem;
  border-radius: 0.75rem;
  border: 1px solid var(--border);
  background: #fff;
  font-size: 0.9rem;
  color: var(--text);
}

.editor-row select option {
  color: var(--text);
}

.close-modal {
  font-size: 1.2rem;
  padding: 0.2rem 0.7rem;
}

body.modal-open {
  overflow: hidden;
}

.inventory-item.category-apparel {
  border-color: var(--category-apparel-border);
  background: var(--category-apparel-bg);
}

.inventory-item.category-sticker {
  border-color: var(--category-sticker-border);
  background: var(--category-sticker-bg);
}

.inventory-item.category-badge {
  border-color: var(--category-badge-border);
  background: var(--category-badge-bg);
}

.inventory-item.category-media {
  border-color: var(--category-media-border);
  background: var(--category-media-bg);
}

.inventory-item.category-donation {
  border-color: var(--category-donation-border);
  background: var(--category-donation-bg);
}

.inventory-item.category-goods {
  border-color: var(--category-goods-border);
  background: var(--category-goods-bg);
}

.inventory-item.category-custom {
  border-color: var(--category-custom-border);
  background: var(--category-custom-bg);
}

.inventory-item.category-apparel .item-category {
  background: rgba(91, 94, 234, 0.18);
  color: #2e308f;
}

.inventory-item.category-sticker .item-category {
  background: rgba(87, 189, 122, 0.22);
  color: #22663e;
}

.inventory-item.category-badge .item-category {
  background: rgba(241, 152, 64, 0.2);
  color: #7a3e05;
}

.inventory-item.category-media .item-category {
  background: rgba(69, 176, 216, 0.2);
  color: #1c4b63;
}

.inventory-item.category-donation .item-category {
  background: rgba(235, 104, 160, 0.2);
  color: #7b1f48;
}

.inventory-item.category-goods .item-category {
  background: rgba(154, 178, 92, 0.24);
  color: #445511;
}

.inventory-item.category-custom .item-category {
  background: rgba(108, 108, 133, 0.18);
  color: #3b3b4d;
}

@media (max-width: 768px) {
  .app-grid {
    grid-template-columns: 1fr;
  }

  .inventory-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 0.5rem;
  }

  .cart-actions {
    grid-template-columns: 1fr;
  }

}