:root {
  color-scheme: light;
  font-family: Inter, "Segoe UI", "Microsoft YaHei", Arial, sans-serif;
  background: #f4f6f8;
  color: #17202a;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
}

button,
input,
textarea {
  font: inherit;
}

button {
  border: 0;
  cursor: pointer;
}

.app-shell {
  display: grid;
  grid-template-columns: 292px minmax(0, 1fr);
  min-height: 100vh;
}

.sidebar {
  background: #ffffff;
  border-right: 1px solid #d9dee7;
  display: flex;
  flex-direction: column;
  gap: 22px;
  padding: 18px;
}

.brand {
  align-items: center;
  display: flex;
  gap: 12px;
}

.brand-mark {
  align-items: center;
  background: #101318;
  border-radius: 8px;
  color: #ffffff;
  display: grid;
  font-weight: 800;
  height: 42px;
  justify-content: center;
  width: 42px;
}

.brand h1,
.topbar h2,
.chat-header h3 {
  margin: 0;
}

.brand h1 {
  font-size: 16px;
}

.brand p,
.topbar .eyebrow,
.chat-header p,
.section-title small {
  color: #687385;
  margin: 4px 0 0;
}

.nav-tabs {
  display: grid;
  gap: 8px;
}

.nav-tab,
.ghost-btn,
.primary-btn,
.conversation-item {
  border-radius: 7px;
  min-height: 38px;
  padding: 9px 12px;
}

.nav-tab {
  background: transparent;
  color: #344054;
  text-align: left;
}

.nav-tab.active,
.nav-tab:hover {
  background: #eef1f5;
  color: #101318;
}

.primary-btn {
  background: #101318;
  color: #ffffff;
}

.ghost-btn {
  background: #eef1f5;
  color: #101318;
}

button:disabled {
  cursor: not-allowed;
  opacity: 0.5;
}

.shop-card,
.panel,
.metric {
  background: #ffffff;
  border: 1px solid #d9dee7;
  border-radius: 8px;
}

.shop-card {
  padding: 12px;
}

.full-width-btn {
  margin-bottom: 12px;
  width: 100%;
}

.section-title {
  align-items: center;
  display: flex;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 14px;
}

.section-title > span {
  font-weight: 700;
}

.shop-list,
.action-list,
.pricing-list,
.conversation-list,
.kb-list,
.note-list,
.candidate-list,
.next-actions {
  display: grid;
  gap: 10px;
}

.shop-item,
.action-item,
.pricing-item,
.kb-item,
.note-item,
.candidate-card,
.evaluation-card {
  border: 1px solid #e1e6ee;
  border-radius: 7px;
  padding: 12px;
}

.shop-item strong,
.shop-item span,
.kb-item strong,
.kb-item span,
td span {
  display: block;
}

.shop-item span,
.kb-item span,
.kb-item p,
td span,
.pricing-item span,
.candidate-card span,
.evaluation-card span,
.candidate-card li,
.evaluation-card li,
.note-item,
.next-actions div {
  color: #687385;
  font-size: 13px;
  line-height: 1.45;
}

.note-list {
  margin-bottom: 14px;
}

.note-item {
  background: #f8fafc;
}

.main-panel {
  display: grid;
  grid-template-rows: auto 1fr;
  min-width: 0;
}

.topbar {
  align-items: center;
  background: #ffffff;
  border-bottom: 1px solid #d9dee7;
  display: flex;
  justify-content: space-between;
  padding: 18px 24px;
}

.topbar-actions {
  display: flex;
  gap: 10px;
}

.view {
  display: none;
  overflow: auto;
  padding: 22px;
}

.view.active {
  display: block;
}

.metric-grid {
  display: grid;
  gap: 14px;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  margin-bottom: 18px;
}

.metric {
  padding: 16px;
}

.metric span {
  color: #687385;
  display: block;
  font-size: 13px;
  margin-bottom: 8px;
}

.metric strong {
  font-size: 24px;
}

.content-grid,
.product-layout,
.service-layout,
.knowledge-layout,
.sourcing-layout,
.import-layout {
  display: grid;
  gap: 18px;
}

.content-grid {
  grid-template-columns: minmax(0, 1fr) 420px;
}

.product-layout,
.knowledge-layout,
.import-layout {
  grid-template-columns: minmax(0, 1fr) 360px;
}

.service-layout {
  grid-template-columns: 320px minmax(0, 1fr);
}

.sourcing-layout {
  grid-template-columns: minmax(0, 1fr) 430px;
}

.sourcing-layout .evaluator-panel {
  grid-column: 1 / -1;
}

.panel {
  min-width: 0;
  padding: 16px;
}

.pricing-item {
  align-items: center;
  display: flex;
  justify-content: space-between;
  gap: 14px;
}

.price-pair {
  min-width: 120px;
  text-align: right;
}

.price-pair span {
  text-decoration: line-through;
}

.candidate-card,
.evaluation-card {
  display: grid;
  gap: 12px;
}

.candidate-head,
.candidate-stats {
  align-items: center;
  display: flex;
  gap: 12px;
  justify-content: space-between;
}

.candidate-head strong,
.candidate-head span {
  display: block;
}

.score-box {
  background: #101318;
  border-radius: 7px;
  color: #ffffff;
  min-width: 74px;
  padding: 8px;
  text-align: center;
}

.score-box strong {
  display: block;
  font-size: 22px;
}

.score-box span {
  color: #d7dde7;
  font-size: 12px;
}

.candidate-stats {
  background: #f8fafc;
  border: 1px solid #e1e6ee;
  border-radius: 7px;
  flex-wrap: wrap;
  justify-content: flex-start;
  padding: 10px;
}

.candidate-card p,
.evaluation-card p {
  font-weight: 700;
  margin: 0;
}

.candidate-card ul,
.evaluation-card ul {
  margin: 0;
  padding-left: 18px;
}

.status-pill {
  background: #e9f7ef;
  border: 1px solid #b7e2c8;
  border-radius: 999px;
  color: #17633a;
  display: inline-flex;
  font-weight: 700;
  padding: 4px 9px;
}

.evaluation-result {
  margin-top: 14px;
}

.table-wrap {
  overflow: auto;
}

table {
  border-collapse: collapse;
  min-width: 880px;
  width: 100%;
}

th,
td {
  border-bottom: 1px solid #e1e6ee;
  padding: 12px 10px;
  text-align: left;
  vertical-align: top;
}

th {
  color: #687385;
  font-size: 13px;
  font-weight: 700;
}

.form-grid,
.kb-form,
.import-form {
  display: grid;
  gap: 10px;
}

.file-drop {
  align-items: center;
  border: 1px dashed #9aa4b2;
  border-radius: 8px;
  display: grid;
  gap: 8px;
  min-height: 132px;
  padding: 18px;
}

.file-drop input {
  border: 0;
  padding: 0;
}

.file-drop span,
.field-list span,
.import-summary span {
  color: #687385;
  display: block;
  font-size: 13px;
  line-height: 1.45;
}

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

.field-list div {
  border: 1px solid #e1e6ee;
  border-radius: 7px;
  padding: 12px;
}

.import-result {
  display: grid;
  gap: 12px;
  margin-top: 14px;
}

.import-summary {
  display: grid;
  gap: 10px;
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.import-summary div {
  background: #f8fafc;
  border: 1px solid #e1e6ee;
  border-radius: 7px;
  padding: 12px;
}

.import-summary strong {
  display: block;
  font-size: 22px;
}

.form-submit {
  margin-top: 4px;
}

input,
textarea {
  border: 1px solid #cbd5e1;
  border-radius: 7px;
  min-width: 0;
  padding: 10px 12px;
  width: 100%;
}

textarea {
  min-height: 96px;
  resize: vertical;
}

.conversation-item {
  background: #ffffff;
  border: 1px solid #e1e6ee;
  color: #17202a;
  text-align: left;
}

.conversation-item.active {
  border-color: #101318;
  box-shadow: 0 0 0 1px #101318 inset;
}

.conversation-item strong,
.conversation-item span {
  display: block;
}

.conversation-item span {
  color: #687385;
  font-size: 13px;
  line-height: 1.4;
  margin-top: 4px;
}

.chat-panel {
  display: grid;
  grid-template-rows: auto minmax(280px, 1fr) auto;
  min-height: 650px;
}

.chat-header {
  align-items: center;
  border-bottom: 1px solid #e1e6ee;
  display: flex;
  justify-content: space-between;
  margin: -16px -16px 0;
  padding: 16px;
}

.messages {
  display: flex;
  flex-direction: column;
  gap: 12px;
  overflow: auto;
  padding: 18px 0;
}

.message {
  border-radius: 8px;
  line-height: 1.5;
  max-width: 72%;
  padding: 12px 14px;
}

.message.buyer {
  align-self: flex-start;
  background: #f8fafc;
  border: 1px solid #d9dee7;
}

.message.seller {
  align-self: flex-end;
  background: #dff7e7;
}

.composer {
  border-top: 1px solid #e1e6ee;
  display: grid;
  gap: 12px;
  grid-template-columns: minmax(0, 1fr) auto;
  margin: 0 -16px -16px;
  padding: 16px;
}

.toast {
  background: #101318;
  border-radius: 7px;
  bottom: 18px;
  color: #ffffff;
  left: 50%;
  opacity: 0;
  padding: 10px 14px;
  pointer-events: none;
  position: fixed;
  transform: translate(-50%, 12px);
  transition: 160ms ease;
}

.toast.visible {
  opacity: 1;
  transform: translate(-50%, 0);
}

@media (max-width: 1120px) {
  .app-shell,
  .content-grid,
  .product-layout,
  .service-layout,
  .knowledge-layout,
  .sourcing-layout,
  .import-layout {
    grid-template-columns: 1fr;
  }

  .sourcing-layout .evaluator-panel {
    grid-column: auto;
  }

  .sidebar {
    border-bottom: 1px solid #d9dee7;
    border-right: 0;
  }

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

@media (max-width: 680px) {
  .topbar,
  .topbar-actions,
  .composer {
    align-items: stretch;
    flex-direction: column;
    grid-template-columns: 1fr;
  }

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

  .import-summary {
    grid-template-columns: 1fr;
  }

  .view {
    padding: 14px;
  }
}