:root {
  color-scheme: light;
  --bg: #f4f6fa;
  --bg-accent: rgba(255, 255, 255, 0.72);
  --panel: rgba(255, 255, 255, 0.74);
  --panel-strong: rgba(255, 255, 255, 0.88);
  --panel-hover: rgba(255, 255, 255, 0.9);
  --text: #18212f;
  --muted: #66768f;
  --line: rgba(128, 145, 176, 0.22);
  --line-strong: rgba(100, 120, 150, 0.3);
  --primary: #0a84ff;
  --primary-pressed: #0071e3;
  --primary-soft: rgba(10, 132, 255, 0.1);
  --danger: #d92d20;
  --danger-soft: rgba(217, 45, 32, 0.1);
  --warning: #c76c00;
  --success: #19935d;
  --shadow-xs: 0 1px 2px rgba(18, 28, 45, 0.05);
  --shadow-sm: 0 8px 24px rgba(35, 52, 79, 0.08);
  --shadow-md: 0 18px 44px rgba(35, 52, 79, 0.12);
  --radius-xs: 12px;
  --radius-sm: 16px;
  --radius-md: 22px;
  --radius-lg: 28px;
  --blur: saturate(170%) blur(22px);
  --transition-fast: 180ms cubic-bezier(0.2, 0.8, 0.2, 1);
  --transition-base: 220ms cubic-bezier(0.2, 0.8, 0.2, 1);
  --transition-slow: 280ms cubic-bezier(0.2, 0.8, 0.2, 1);
}

* {
  box-sizing: border-box;
}

html {
  background:
    radial-gradient(circle at top left, rgba(10, 132, 255, 0.1), transparent 28%),
    radial-gradient(circle at top right, rgba(90, 200, 250, 0.08), transparent 24%),
    linear-gradient(180deg, #f7f9fc 0%, #f2f5f9 100%);
}

body {
  margin: 0;
  min-height: 100vh;
  color: var(--text);
  font-family: "SF Pro Display", "PingFang SC", "Microsoft YaHei", Arial, sans-serif;
  line-height: 1.45;
  background: transparent;
  letter-spacing: 0;
}

button,
input,
select,
textarea {
  font: inherit;
}

button,
input,
select,
textarea,
.panel,
.table-wrap,
.supply-card,
.category-card,
.supplier-card,
.supplier-row,
.modal-panel,
.tab,
.stock-badge,
#toast {
  transition:
    background-color var(--transition-fast),
    border-color var(--transition-fast),
    box-shadow var(--transition-fast),
    transform var(--transition-fast),
    opacity var(--transition-fast),
    color var(--transition-fast);
}

button {
  appearance: none;
  border: 1px solid transparent;
  border-radius: 16px;
  background: linear-gradient(180deg, #2f95ff 0%, #0a84ff 100%);
  color: #fff;
  cursor: pointer;
  min-height: 40px;
  padding: 0 18px;
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.24),
    0 10px 24px rgba(10, 132, 255, 0.2);
}

button:hover {
  transform: translateY(-1px);
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.26),
    0 14px 28px rgba(10, 132, 255, 0.24);
}

button:active {
  transform: scale(0.985);
  opacity: 0.92;
  background: linear-gradient(180deg, #268cff 0%, #007aff 100%);
}

button.secondary,
.tab,
#logoutButton {
  border-color: var(--line);
  background: var(--panel);
  color: var(--text);
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.85),
    var(--shadow-xs);
  backdrop-filter: var(--blur);
  -webkit-backdrop-filter: var(--blur);
}

button.secondary:hover,
.tab:hover,
#logoutButton:hover {
  background: var(--panel-hover);
  border-color: var(--line-strong);
}

button.danger {
  background: rgba(255, 255, 255, 0.8);
  color: var(--danger);
  border-color: rgba(217, 45, 32, 0.18);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.86);
}

button.danger:hover {
  background: rgba(255, 245, 245, 0.96);
  box-shadow: 0 10px 18px rgba(217, 45, 32, 0.1);
}

button:disabled {
  cursor: not-allowed;
  opacity: 0.45;
  transform: none;
  box-shadow: none;
}

input,
select,
textarea {
  width: 100%;
  min-height: 42px;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: rgba(255, 255, 255, 0.78);
  color: var(--text);
  padding: 10px 14px;
  box-shadow:
    inset 0 1px 1px rgba(255, 255, 255, 0.7),
    0 1px 2px rgba(20, 32, 53, 0.04);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
}

input::placeholder,
textarea::placeholder {
  color: #8c9ab0;
}

input:focus,
select:focus,
textarea:focus {
  outline: none;
  border-color: rgba(10, 132, 255, 0.42);
  box-shadow:
    0 0 0 4px rgba(10, 132, 255, 0.12),
    inset 0 1px 1px rgba(255, 255, 255, 0.78);
  background: rgba(255, 255, 255, 0.94);
}

textarea {
  resize: vertical;
}

label {
  display: grid;
  gap: 8px;
  color: var(--muted);
  font-size: 13px;
  font-weight: 500;
}

main {
  width: min(1200px, calc(100% - 40px));
  margin: 26px auto 64px;
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  justify-content: space-between;
  gap: 24px;
  align-items: center;
  padding: 26px max(72px, calc((100vw - 1200px) / 2)) 24px max(20px, calc((100vw - 1200px) / 2));
  background: rgba(247, 249, 252, 0.76);
  border-bottom: 1px solid rgba(130, 146, 176, 0.16);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
}

.topbar h1 {
  margin: 0;
  font-size: clamp(24px, 3vw, 34px);
  font-weight: 700;
  letter-spacing: -0.02em;
}

.topbar p {
  margin: 8px 0 0;
  color: var(--muted);
  font-size: 14px;
}

.account {
  position: absolute;
  top: 24px;
  right: max(20px, calc((100vw - 1200px) / 2));
  display: flex;
  align-items: center;
  gap: 12px;
  white-space: nowrap;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
}

.avatar-button {
  position: relative;
  width: 44px;
  min-width: 44px;
  height: 44px;
  min-height: 44px;
  border: 1px solid rgba(122, 142, 171, 0.22);
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.74);
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.9),
    0 10px 24px rgba(32, 56, 91, 0.1);
  backdrop-filter: var(--blur);
  -webkit-backdrop-filter: var(--blur);
}

.avatar-button::before,
.avatar-button::after {
  content: "";
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
  background: linear-gradient(180deg, #4fb0ff 0%, #0a84ff 100%);
}

.avatar-button::before {
  top: 10px;
  width: 10px;
  height: 10px;
  border-radius: 50%;
}

.avatar-button::after {
  bottom: 8px;
  width: 20px;
  height: 12px;
  border-radius: 999px 999px 8px 8px;
}

#logoutButton {
  min-height: 44px;
  padding: 0 22px;
  border-radius: 999px;
}

.tabs {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  margin: 22px 0 14px;
}

.tab {
  min-height: 44px;
  border-radius: 16px;
  padding: 0 18px;
  color: var(--muted);
}

.tab.active {
  background: linear-gradient(180deg, #2c92ff 0%, #0a84ff 100%);
  color: #fff;
  border-color: rgba(10, 132, 255, 0.1);
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.22),
    0 12px 28px rgba(10, 132, 255, 0.2);
}

.tab-page {
  display: none;
}

.tab-page.active {
  display: block;
  animation: pageFade var(--transition-slow) ease;
}

@keyframes pageFade {
  from {
    opacity: 0;
    transform: translateY(6px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.panel,
.table-wrap,
.category-card,
.supply-card,
.supplier-card,
.empty-list,
.modal-panel {
  background: var(--panel);
  border: 1px solid var(--line);
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.75),
    var(--shadow-sm);
  backdrop-filter: var(--blur);
  -webkit-backdrop-filter: var(--blur);
}

.panel {
  border-radius: var(--radius-md);
  padding: 18px;
  margin-bottom: 18px;
}

.panel h2 {
  margin-top: 0;
}

.grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(150px, 1fr));
  gap: 14px;
  align-items: end;
}

.grid.compact {
  grid-template-columns: repeat(3, minmax(150px, 1fr)) auto auto;
}

.usage-filter.grid.compact {
  grid-template-columns: repeat(4, minmax(118px, 1fr)) auto auto;
  gap: 10px;
  padding: 14px;
}

.purchase-filter.grid.compact {
  grid-template-columns: repeat(5, minmax(108px, 1fr)) auto auto;
}

.usage-filter label {
  gap: 5px;
  font-size: 12px;
}

.usage-filter input,
.usage-filter button {
  min-height: 36px;
}

.wide {
  grid-column: span 2;
}

.section-title {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 14px;
  margin: 24px 0 14px;
}

.section-title h2,
.detail-title-group h3 {
  margin: 0;
  font-size: 18px;
  letter-spacing: -0.02em;
}

.section-title span,
#itemCount,
#purchaseCount,
#inventoryDetailCount,
#supplierQuoteCount {
  color: var(--muted);
  font-size: 14px;
}

.compact-title {
  margin-top: 8px;
}

.inventory-detail-title {
  margin-top: 12px;
}

.detail-title-group {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}

.category-grid {
  display: grid;
  grid-template-columns: repeat(6, minmax(0, 1fr));
  gap: 14px;
  margin-bottom: 18px;
}

.category-card {
  display: grid;
  gap: 8px;
  min-height: 92px;
  align-content: center;
  border-radius: 24px;
  text-align: left;
  color: var(--text);
  padding: 16px 18px;
}

.category-card strong {
  font-size: 17px;
  font-weight: 650;
}

.category-card span {
  color: var(--muted);
  font-size: 13px;
}

.category-card.active {
  border-color: rgba(10, 132, 255, 0.24);
  background: rgba(255, 255, 255, 0.9);
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.9),
    0 16px 30px rgba(10, 132, 255, 0.08);
}

.category-card:hover,
.supply-card:hover,
.supplier-card:hover,
.supplier-row:hover,
.panel:hover,
.table-wrap:hover {
  border-color: var(--line-strong);
  transform: translateY(-1px);
}

.item-search {
  display: grid;
  grid-template-columns: minmax(180px, 1fr) auto;
  gap: 12px;
  align-items: end;
  margin: 0 0 16px;
}

.item-search label {
  font-size: 0;
}

.item-search input,
.item-search button {
  min-height: 40px;
}

.inventory-actions,
.export-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 0 0 16px;
}

.small-action-button {
  min-height: 34px;
  padding: 0 14px;
  font-size: 14px;
}

.claim-form {
  display: none;
}

.claim-form.open {
  display: grid;
}

.table-wrap {
  overflow: hidden auto;
  border-radius: var(--radius-md);
}

table {
  width: 100%;
  min-width: 760px;
  border-collapse: collapse;
}

th,
td {
  padding: 13px 16px;
  border-bottom: 1px solid rgba(126, 142, 170, 0.12);
  text-align: left;
  vertical-align: top;
}

th {
  color: var(--muted);
  font-size: 12px;
  font-weight: 600;
  background: rgba(255, 255, 255, 0.48);
}

tbody tr {
  background: rgba(255, 255, 255, 0.12);
}

tbody tr:hover {
  background: rgba(255, 255, 255, 0.3);
}

tbody tr:last-child td {
  border-bottom: 0;
}

.empty {
  color: var(--muted);
  text-align: center;
}

.item-list,
.supplier-comparison-list {
  display: grid;
  gap: 10px;
}

.supply-card {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 14px;
  align-items: center;
  border-radius: 24px;
  padding: 12px 14px;
}

.low-stock-card {
  border-color: rgba(199, 108, 0, 0.26);
  background: rgba(255, 250, 244, 0.86);
}

.supply-main h3 {
  margin: 0 0 4px;
  font-size: 16px;
  font-weight: 640;
}

.supply-main p,
.stock-line {
  margin: 0;
  color: var(--muted);
  font-size: 13px;
}

.stock-line strong {
  color: var(--primary);
  font-size: 20px;
  line-height: 1;
  font-weight: 700;
}

.supply-actions {
  display: grid;
  gap: 6px;
  justify-items: end;
  min-width: 98px;
}

.stock-badge {
  min-height: 28px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid rgba(10, 132, 255, 0.2);
  border-radius: 999px;
  background: rgba(10, 132, 255, 0.08);
  color: var(--primary);
  font-size: 12px;
  padding: 0 10px;
}

.stock-badge.out {
  border-color: rgba(217, 45, 32, 0.18);
  background: rgba(217, 45, 32, 0.08);
  color: var(--danger);
}

.supply-actions button {
  min-height: 32px;
  padding: 0 13px;
}

.empty-list {
  border-radius: var(--radius-md);
  color: var(--muted);
  padding: 28px 20px;
  text-align: center;
}

.supplier-card {
  border-radius: var(--radius-md);
  padding: 12px 14px;
}

.supplier-card-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 16px;
  margin-bottom: 8px;
}

.supplier-card-header h3 {
  margin: 0 0 4px;
  font-size: 18px;
}

.supplier-card-header p,
.supplier-row p {
  margin: 0;
  color: var(--muted);
  font-size: 12px;
  line-height: 1.35;
}

.supplier-card-summary {
  display: grid;
  gap: 3px;
  justify-items: end;
  text-align: right;
}

.supplier-lowest-price,
.supplier-price {
  color: var(--primary);
  font-weight: 700;
}

.supplier-lowest-price {
  font-size: 13px;
}

.supplier-rows {
  display: grid;
  gap: 8px;
}

.supplier-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  border: 1px solid rgba(128, 145, 176, 0.18);
  border-radius: 20px;
  background: rgba(255, 255, 255, 0.52);
  padding: 10px 12px;
}

.supplier-row.best {
  border-color: rgba(10, 132, 255, 0.26);
  background: rgba(10, 132, 255, 0.08);
}

.best-price-tag {
  display: inline-flex;
  align-items: center;
  min-height: 20px;
  margin-bottom: 3px;
  padding: 0 8px;
  border-radius: 999px;
  background: rgba(10, 132, 255, 0.12);
  color: var(--primary);
  font-size: 11px;
  font-weight: 700;
}

.supplier-contact,
.supplier-contact-inline {
  color: var(--muted);
  font-size: 11px;
}

.supplier-contact-inline {
  font-weight: 500;
}

.supplier-row-actions {
  display: grid;
  gap: 5px;
  justify-items: end;
}

.supplier-action-buttons {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
  justify-content: flex-end;
}

.supplier-action-buttons button {
  min-height: 30px;
  padding: 0 10px;
  border-radius: 14px;
}

.supplier-price {
  font-size: 16px;
  white-space: nowrap;
}

.selected-quote span::after {
  content: " 已选";
  color: var(--primary);
  font-size: 12px;
  font-weight: 700;
}

.stock-editor {
  display: inline-grid;
  grid-template-columns: 82px auto;
  gap: 8px;
  align-items: center;
  margin-right: 8px;
}

.stock-editor input,
.stock-editor button {
  min-height: 34px;
}

.modal {
  position: fixed;
  inset: 0;
  z-index: 20;
  display: grid;
  place-items: center;
  background: rgba(16, 23, 36, 0.24);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  padding: 20px;
  animation: fadeIn var(--transition-base) ease;
}

.modal-panel {
  width: min(900px, 100%);
  max-height: calc(100vh - 40px);
  overflow: auto;
  border-radius: var(--radius-lg);
  padding: 22px;
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.84),
    var(--shadow-md);
  animation: modalIn var(--transition-slow) ease;
}

.modal-title {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 14px;
  margin-bottom: 18px;
}

.modal-title h2 {
  margin: 0;
  font-size: 20px;
}

.hidden {
  display: none !important;
}

#toast {
  position: fixed;
  left: 50%;
  bottom: 24px;
  z-index: 40;
  transform: translateX(-50%);
  min-width: min(420px, calc(100vw - 32px));
  border-radius: 18px;
  border: 1px solid rgba(255, 255, 255, 0.22);
  background: rgba(25, 33, 48, 0.82);
  color: #fff;
  padding: 12px 16px;
  box-shadow: var(--shadow-md);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  opacity: 0;
  pointer-events: none;
}

#toast.show {
  opacity: 1;
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

@keyframes modalIn {
  from {
    opacity: 0;
    transform: translateY(10px) scale(0.985);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

@media (max-width: 980px) {
  main {
    width: min(100%, calc(100% - 24px));
  }

  .topbar {
    padding-left: 18px;
    padding-right: 18px;
  }

  .account {
    right: 18px;
  }

  .category-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 840px) {
  .topbar {
    position: static;
    align-items: flex-start;
    padding-bottom: 18px;
  }

  .account {
    position: static;
    margin-left: auto;
  }

  .grid,
  .grid.compact,
  .usage-filter.grid.compact,
  .purchase-filter.grid.compact {
    grid-template-columns: 1fr;
  }

  .wide {
    grid-column: auto;
  }

  .section-title,
  .supplier-card-header,
  .supplier-row,
  .modal-title {
    flex-direction: column;
    align-items: flex-start;
  }

  .supplier-card-summary,
  .supplier-row-actions,
  .supplier-action-buttons {
    justify-items: start;
    justify-content: flex-start;
    text-align: left;
  }

  .tabs {
    gap: 8px;
  }

  .tab {
    min-height: 42px;
    padding: 0 15px;
  }

  .category-grid,
  .supply-card {
    grid-template-columns: 1fr;
  }

  .item-search {
    grid-template-columns: 1fr;
  }

  table {
    min-width: 680px;
  }

  .modal-panel {
    padding: 18px;
  }
}