:root {
  --bg: #f5f7f6;
  --panel: #ffffff;
  --line: #d9e0dc;
  --line-strong: #bac7c1;
  --text: #17211c;
  --muted: #66746d;
  --green: #27745d;
  --blue: #245f9f;
  --amber: #a46a18;
  --red: #aa3d34;
  --soft-green: #e7f3ee;
  --soft-blue: #e7eef8;
  --soft-amber: #fff2dc;
  --shadow: 0 12px 32px rgba(34, 48, 41, 0.08);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  color: var(--text);
  background: var(--bg);
  font-family: Inter, "PingFang SC", "Microsoft YaHei", Arial, sans-serif;
  letter-spacing: 0;
}

button,
input,
select {
  font: inherit;
}

button,
.link-button {
  min-height: 36px;
  border: 1px solid var(--line-strong);
  border-radius: 6px;
  padding: 0 12px;
  color: var(--text);
  background: var(--panel);
  cursor: pointer;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  white-space: nowrap;
}

button:hover,
.link-button:hover {
  border-color: var(--green);
  color: var(--green);
}

.app-shell {
  min-height: 100vh;
  display: grid;
  grid-template-columns: 260px minmax(0, 1fr);
}

.sidebar {
  position: sticky;
  top: 0;
  height: 100vh;
  padding: 20px 16px;
  background: #fbfcfb;
  border-right: 1px solid var(--line);
  display: flex;
  flex-direction: column;
  gap: 18px;
}

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

.brand-mark {
  width: 44px;
  height: 44px;
  border-radius: 8px;
  display: grid;
  place-items: center;
  background: var(--green);
  color: #fff;
  font-weight: 800;
}

.brand h1,
.brand p,
.section-heading h2,
.section-heading p {
  margin: 0;
}

.brand h1 {
  font-size: 18px;
}

.brand p,
.section-heading p,
.status-panel,
.cell-meta,
.muted {
  color: var(--muted);
}

.brand p {
  margin-top: 4px;
  font-size: 13px;
}

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

.nav-tab {
  justify-content: flex-start;
  border-color: transparent;
  background: transparent;
}

.nav-tab.active {
  color: var(--green);
  background: var(--soft-green);
  border-color: #c6e2d6;
}

.status-panel {
  margin-top: auto;
  padding: 12px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
}

.status-dot {
  width: 8px;
  height: 8px;
  border-radius: 999px;
  background: var(--amber);
}

.status-dot.ok {
  background: var(--green);
}

.status-dot.fail {
  background: var(--red);
}

.workspace {
  min-width: 0;
  padding: 20px;
}

.toolbar {
  position: sticky;
  top: 0;
  z-index: 5;
  display: grid;
  grid-template-columns: repeat(3, minmax(150px, 220px)) 1fr;
  gap: 12px;
  align-items: end;
  padding: 14px;
  background: rgba(245, 247, 246, 0.94);
  backdrop-filter: blur(10px);
  border: 1px solid var(--line);
  border-radius: 8px;
}

label {
  display: grid;
  gap: 6px;
  font-size: 13px;
  color: var(--muted);
}

input,
select {
  width: 100%;
  min-height: 36px;
  border: 1px solid var(--line-strong);
  border-radius: 6px;
  padding: 0 10px;
  color: var(--text);
  background: var(--panel);
}

input:focus,
select:focus {
  outline: 2px solid #b9ddcf;
  border-color: var(--green);
}

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

.view {
  display: none;
  margin-top: 18px;
}

.view.active {
  display: block;
}

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

.section-heading h2 {
  font-size: 22px;
  line-height: 1.2;
}

.section-heading p {
  margin-top: 6px;
  font-size: 13px;
}

.badge {
  display: inline-flex;
  align-items: center;
  min-height: 28px;
  padding: 0 10px;
  border-radius: 999px;
  color: var(--blue);
  background: var(--soft-blue);
  font-size: 13px;
}

.table-wrap {
  overflow: auto;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
  box-shadow: var(--shadow);
}

.matrix-table {
  width: 100%;
  min-width: 980px;
  border-collapse: collapse;
  table-layout: fixed;
}

.matrix-table th,
.matrix-table td {
  border-bottom: 1px solid var(--line);
  padding: 10px;
  vertical-align: top;
  text-align: left;
}

.matrix-table th {
  position: sticky;
  top: 0;
  z-index: 2;
  background: #f9fbfa;
  color: #34433c;
  font-size: 12px;
  font-weight: 700;
}

.matrix-table tr:last-child td {
  border-bottom: 0;
}

.price-cell {
  display: grid;
  gap: 4px;
  min-height: 76px;
}

.price {
  font-weight: 800;
  color: var(--text);
}

.lowest {
  background: var(--soft-green);
}

.source-pill {
  width: fit-content;
  padding: 2px 6px;
  border-radius: 999px;
  color: var(--green);
  background: var(--soft-green);
  font-size: 12px;
}

.warn-pill {
  color: var(--amber);
  background: var(--soft-amber);
}

.cell-meta {
  font-size: 12px;
  line-height: 1.35;
}

.feature-grid {
  display: grid;
  gap: 6px;
}

.feature-item {
  display: grid;
  gap: 2px;
  padding-bottom: 6px;
  border-bottom: 1px dashed var(--line);
}

.feature-item:last-child {
  border-bottom: 0;
}

.toggle,
.check-row {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--text);
}

.toggle input,
.check-row input {
  width: auto;
  min-height: auto;
}

.quote-layout,
.datasource-layout {
  display: grid;
  grid-template-columns: minmax(320px, 460px) minmax(0, 1fr);
  gap: 16px;
}

.form-panel,
.result-panel {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
  box-shadow: var(--shadow);
  padding: 16px;
}

.form-grid,
.discount-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

fieldset {
  margin: 14px 0 0;
  padding: 14px;
  border: 1px solid var(--line);
  border-radius: 8px;
}

legend {
  padding: 0 6px;
  color: var(--muted);
  font-size: 13px;
}

.discount-row {
  display: grid;
  grid-template-columns: 82px 1fr;
  gap: 8px;
  align-items: end;
}

.result-panel {
  min-height: 520px;
}

.recommendation {
  display: grid;
  gap: 12px;
}

.summary-band {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
}

.metric {
  padding: 12px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fbfcfb;
}

.metric strong {
  display: block;
  margin-top: 4px;
  font-size: 20px;
}

.quote-list {
  display: grid;
  gap: 8px;
}

.quote-row {
  display: grid;
  grid-template-columns: 110px 1fr 100px;
  gap: 10px;
  align-items: center;
  padding: 10px;
  border: 1px solid var(--line);
  border-radius: 8px;
}

.quote-row.disqualified {
  opacity: 0.68;
  background: #fafafa;
}

.empty-state {
  min-height: 180px;
  display: grid;
  place-items: center;
  color: var(--muted);
  border: 1px dashed var(--line-strong);
  border-radius: 8px;
}

@media (max-width: 960px) {
  .app-shell {
    grid-template-columns: 1fr;
  }

  .sidebar {
    position: static;
    height: auto;
  }

  .nav-tabs {
    grid-template-columns: repeat(4, 1fr);
  }

  .toolbar,
  .quote-layout,
  .datasource-layout,
  .summary-band {
    grid-template-columns: 1fr;
  }

  .toolbar-actions {
    justify-content: flex-start;
    flex-wrap: wrap;
  }

  .section-heading {
    align-items: flex-start;
    flex-direction: column;
  }
}

@media (max-width: 620px) {
  .workspace {
    padding: 12px;
  }

  .nav-tabs,
  .form-grid,
  .discount-grid {
    grid-template-columns: 1fr;
  }

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

.data-warning {
  padding: 10px 12px;
  border-radius: 8px;
  border: 1px solid #f0c987;
  background: var(--soft-amber);
  color: var(--amber);
  font-size: 12px;
  line-height: 1.4;
}

.data-banner {
  margin-bottom: 14px;
  padding: 12px 14px;
  border: 1px solid #f0c987;
  border-left: 4px solid var(--amber);
  border-radius: 8px;
  background: var(--soft-amber);
  color: #6f430b;
}

.status-dot.warn {
  background: var(--amber);
}

.source-pill.mock {
  background: var(--soft-amber);
  color: var(--amber);
  border-color: #f0c987;
}

.source-pill.real {
  background: var(--soft-green);
  color: var(--green);
  border-color: #c6e2d6;
}