:root {
  --bg: #f5f7f8;
  --surface: #ffffff;
  --line: #dce3e7;
  --text: #172126;
  --muted: #65727a;
  --primary: #126a67;
  --primary-strong: #0b5452;
  --accent: #b9851b;
  --danger: #b42318;
  --danger-bg: #fff1f0;
  --ok-bg: #eef9f4;
  --shadow: 0 12px 36px rgba(22, 34, 41, 0.08);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family:
    Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI",
    "Microsoft YaHei", sans-serif;
}

button,
input,
select {
  font: inherit;
}

button,
a.ghost {
  min-height: 40px;
  border-radius: 6px;
  border: 1px solid transparent;
  padding: 0 14px;
  cursor: pointer;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  white-space: nowrap;
}

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

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

.ghost {
  background: #fff;
  color: var(--text);
  border-color: var(--line);
}

.ghost:hover {
  border-color: #aebbc2;
}

.hidden {
  display: none !important;
}

.login-shell {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 24px;
}

.login-panel {
  width: min(420px, 100%);
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: var(--shadow);
  padding: 32px;
}

.login-panel h1,
.topbar h1,
.section-head h2 {
  margin: 0;
  letter-spacing: 0;
}

.login-panel h1 {
  font-size: 28px;
}

.eyebrow {
  margin: 0 0 6px;
  color: var(--primary);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0;
  text-transform: uppercase;
}

.muted {
  color: var(--muted);
}

.stack {
  display: grid;
  gap: 16px;
  margin-top: 24px;
}

.app-shell {
  width: min(1440px, 100%);
  margin: 0 auto;
  padding: 24px;
}

.topbar {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 18px;
  padding: 10px 0 22px;
}

.topbar h1 {
  font-size: 30px;
}

.topbar-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  justify-content: flex-end;
}

.metrics {
  display: grid;
  grid-template-columns: repeat(5, minmax(140px, 1fr));
  gap: 12px;
}

.metrics article {
  min-height: 92px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 16px;
  display: grid;
  align-content: center;
  gap: 8px;
}

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

.metrics strong {
  font-size: 28px;
  line-height: 1;
}

.focus-metric {
  border-color: rgba(18, 106, 103, 0.38) !important;
  background: linear-gradient(180deg, #ffffff 0%, #eef9f4 100%) !important;
}

.focus-metric strong {
  color: var(--primary);
}

.danger-metric strong {
  color: var(--danger);
}

.alert {
  margin-top: 14px;
  padding: 12px 14px;
  border-radius: 6px;
  border: 1px solid #f4b7b0;
  background: var(--danger-bg);
  color: var(--danger);
}

.workspace {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(420px, 0.85fr);
  gap: 16px;
  margin-top: 16px;
  align-items: start;
}

.surface {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: var(--shadow);
  padding: 18px;
}

.section-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 16px;
}

.inventory-head {
  align-items: flex-end;
}

.inventory-actions {
  width: min(420px, 100%);
}

.section-head h2 {
  font-size: 20px;
}

.history-head {
  margin-top: 22px;
}

label {
  display: grid;
  gap: 7px;
  color: var(--muted);
  font-size: 13px;
}

input,
select {
  width: 100%;
  min-height: 40px;
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 0 11px;
  color: var(--text);
  background: #fff;
}

input[type="file"] {
  min-height: 44px;
  padding: 8px 11px;
}

input[readonly] {
  color: var(--muted);
  background: #f7f9fa;
}

.image-field {
  display: grid;
  gap: 10px;
}

.image-paste-zone {
  min-height: 92px;
  border: 1px dashed #aebbc2;
  border-radius: 6px;
  background: #fafcfc;
  padding: 12px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  color: var(--muted);
  cursor: text;
}

.image-paste-zone:focus {
  outline: 2px solid rgba(18, 106, 103, 0.18);
  border-color: var(--primary);
}

.image-paste-zone strong,
.image-paste-zone span {
  display: block;
}

.image-paste-zone strong {
  color: var(--text);
  font-size: 14px;
}

.image-paste-zone span {
  margin-top: 4px;
  font-size: 12px;
}

.image-preview {
  width: 76px;
  height: 76px;
  flex: 0 0 76px;
  border: 1px solid var(--line);
  border-radius: 6px;
  object-fit: cover;
  background: #fff;
}

.specs-field {
  display: grid;
  gap: 10px;
}

.field-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  color: var(--muted);
  font-size: 13px;
}

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

.variant-config,
.variant-stock-field {
  display: grid;
  gap: 10px;
}

.variant-config-grid {
  display: grid;
  grid-template-columns: minmax(150px, 0.7fr) minmax(0, 1.3fr);
  gap: 8px;
}

.variant-stock-rows {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 8px;
  padding: 10px;
  background: #f7f9fa;
  border: 1px solid var(--line);
  border-radius: 6px;
}

.variant-stock-row {
  grid-template-columns: minmax(0, 1fr) 100px;
  align-items: center;
  gap: 8px;
  color: var(--text);
}

.variant-stock-row span {
  overflow-wrap: anywhere;
}

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

.manual-spec-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 8px;
}

.small-btn {
  min-height: 32px;
  padding: 0 9px;
  font-size: 12px;
}

.add-sub-spec-prompt {
  display: flex;
  align-items: center;
  gap: 10px;
}

.spec-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr) auto;
  gap: 8px;
}

.product-name {
  font-weight: 700;
  font-size: 16px;
}

.spec-value-badge {
  display: inline-flex;
  min-height: 24px;
  align-items: center;
  padding: 0 7px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: #f7f9fa;
  color: var(--text);
  font-size: 12px;
  font-weight: 700;
}

.product-group-cell {
  vertical-align: middle;
  text-align: center;
  background: #fbfcfc;
}

.products-table th:first-child {
  text-align: center;
}

.product-group-cell .product-main {
  width: 100%;
  align-items: center;
  flex-direction: column;
  justify-content: center;
  text-align: center;
}

.product-group-cell .product-main > div {
  width: 100%;
  text-align: center;
}

.product-group-cell .product-name,
.product-group-cell .sku,
.product-group-cell .subtle {
  text-align: center;
}

.product-group-cell .product-thumb {
  margin: 0 auto;
}

.product-total {
  width: 100%;
  margin-top: 14px;
  padding-top: 10px;
  border-top: 1px solid var(--line);
  text-align: center;
  color: var(--muted);
  font-size: 12px;
}

.product-total strong {
  display: block;
  margin-top: 4px;
  color: var(--primary);
  font-size: 18px;
}

.product-actions {
  width: 100%;
  justify-content: center;
  margin-top: 12px;
}

.variant-branch {
  display: inline-flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 4px;
  font-size: 11px;
}

.variant-branch-separator {
  color: var(--muted);
  font-weight: 800;
}

.spec-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 6px;
}

.spec-badges span {
  min-height: 24px;
  padding: 3px 7px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: #f7f9fa;
  color: var(--muted);
  font-size: 12px;
}

input:focus,
select:focus {
  outline: 2px solid rgba(18, 106, 103, 0.18);
  border-color: var(--primary);
}

.grid-form {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  padding-bottom: 18px;
  border-bottom: 1px solid var(--line);
}

.span-2 {
  grid-column: span 2;
}

.form-actions {
  grid-column: span 2;
  display: flex;
  justify-content: flex-end;
  gap: 8px;
}

.modal-backdrop {
  position: fixed;
  inset: 0;
  z-index: 10;
  background: rgba(17, 29, 34, 0.42);
  display: grid;
  place-items: center;
  padding: 18px;
}

.modal {
  width: min(680px, 100%);
  max-height: min(760px, calc(100vh - 36px));
  overflow: auto;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: 0 24px 70px rgba(14, 24, 28, 0.24);
  padding: 18px;
}

.modal-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 16px;
}

.modal-head h2 {
  margin: 0;
  font-size: 20px;
  letter-spacing: 0;
}

.modal .grid-form {
  border-bottom: 0;
  padding-bottom: 0;
}

.modal-segmented {
  margin-bottom: 14px;
}

.icon-btn {
  min-width: 64px;
}

.segmented {
  display: inline-grid;
  grid-template-columns: 1fr 1fr;
  border: 1px solid var(--line);
  border-radius: 6px;
  overflow: hidden;
}

.segmented button {
  min-width: 72px;
  border: 0;
  border-radius: 0;
  background: #fff;
  color: var(--muted);
}

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

.table-wrap {
  width: 100%;
  overflow-x: auto;
}

table {
  width: 100%;
  border-collapse: collapse;
  table-layout: fixed;
}

.products-table th:nth-child(1),
.products-table td:nth-child(1) {
  width: 27%;
}

.products-table th:nth-child(2),
.products-table td:nth-child(2) {
  width: 23%;
}

.products-table th:nth-child(3),
.products-table td:nth-child(3) {
  width: 18%;
}

.products-table th:nth-child(5),
.products-table td:nth-child(5) {
  width: 25%;
}

th,
td {
  padding: 11px 9px;
  border-bottom: 1px solid var(--line);
  vertical-align: middle;
  text-align: left;
  font-size: 14px;
}

th {
  color: var(--muted);
  font-size: 12px;
  font-weight: 800;
}

td {
  overflow-wrap: anywhere;
}

tbody tr:hover {
  background: #fafcfc;
}

.low-row {
  background: #fffafa;
}

.product-main {
  display: flex;
  align-items: center;
  gap: 10px;
  min-width: 0;
}

.product-main.compact {
  gap: 8px;
}

.sku {
  color: var(--muted);
  font-size: 11px;
  font-weight: 600;
}

.subtle {
  color: var(--muted);
  font-size: 12px;
}

.product-thumb {
  width: 86px;
  height: 86px;
  flex: 0 0 86px;
  border-radius: 6px;
  border: 1px solid var(--line);
  object-fit: cover;
  background: #eef1f3;
}

.product-main.compact .product-thumb {
  width: 54px;
  height: 54px;
  flex-basis: 54px;
}

.product-thumb-empty {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: var(--primary);
  font-weight: 800;
}

.stock-count {
  display: inline-flex;
  align-items: baseline;
  justify-content: flex-start;
  min-width: 82px;
  min-height: 36px;
  color: #116149;
  font-size: 24px;
  font-weight: 900;
  line-height: 1;
  white-space: nowrap;
}

.stock-count.low {
  color: var(--danger);
}

.flow-type {
  display: inline-flex;
  align-items: center;
  min-height: 26px;
  padding: 0 8px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 800;
}

.flow-in {
  background: var(--ok-bg);
  color: #116149;
}

.flow-out {
  background: #fff7e6;
  color: var(--accent);
}

.row-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.row-actions button {
  min-height: 32px;
  padding: 0 9px;
}

button.danger {
  color: var(--danger);
  background: #fff;
  border-color: #f2bbb4;
}

.empty {
  color: var(--muted);
  text-align: center;
  padding: 24px 8px;
}

@media (max-width: 1050px) {
  .metrics {
    grid-template-columns: repeat(3, minmax(140px, 1fr));
  }

  .workspace {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 720px) {
  .app-shell {
    padding: 16px;
  }

  .topbar,
  .section-head {
    align-items: stretch;
    flex-direction: column;
  }

  .topbar-actions {
    justify-content: stretch;
  }

  .topbar-actions > * {
    flex: 1 1 130px;
  }

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

  .metrics article {
    min-height: 84px;
  }

  .grid-form {
    grid-template-columns: 1fr;
  }

  .span-2,
  .form-actions {
    grid-column: span 1;
  }

  .spec-row {
    grid-template-columns: 1fr;
  }

  .manual-spec-row,
  .add-sub-spec-prompt {
    grid-template-columns: 1fr;
    flex-direction: column;
    align-items: stretch;
  }

  .variant-config-grid,
  .variant-stock-rows {
    grid-template-columns: 1fr;
  }

  .modal {
    max-height: calc(100vh - 24px);
    padding: 16px;
  }

  .modal-head {
    align-items: stretch;
    flex-direction: column;
  }

  table {
    min-width: 760px;
  }
}