:root {
  color-scheme: light;
  --background-fill-primary: #ffffff;
  --background-fill-secondary: #f9fafb;
  --background-fill-tertiary: #f3f4f6;
  --border-color-primary: #e5e7eb;
  --border-color-accent: #d1d5db;
  --body-text-color: #111827;
  --body-text-color-subdued: #6b7280;
  --body-text-color-soft: #9ca3af;
  --accent: #1d4ed8;
  --shadow-soft: 0 1px 2px rgba(16, 24, 40, 0.04);
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  min-height: 100%;
  background: var(--background-fill-secondary);
  color: var(--body-text-color);
  font-family:
    ui-sans-serif,
    system-ui,
    -apple-system,
    BlinkMacSystemFont,
    "Segoe UI",
    sans-serif;
}

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

.app-shell {
  display: grid;
  grid-template-columns: 320px minmax(0, 1fr);
  min-height: 100vh;
}

.sidebar {
  border-right: 1px solid var(--border-color-primary);
  background: var(--background-fill-primary);
}

.sidebar-scroll {
  height: 100vh;
  overflow-y: auto;
  padding: 18px 16px 28px;
}

.logo-section {
  padding: 10px 10px 18px;
  border-bottom: 1px solid var(--border-color-primary);
}

.logo {
  display: block;
  width: 138px;
  max-width: 100%;
}

.sidebar-section {
  padding: 18px 10px 0;
}

.section-label,
.eyebrow {
  margin: 0 0 10px;
  color: var(--body-text-color-subdued);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

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

.dropdown-wrap {
  position: relative;
}

.project-select {
  width: 100%;
  padding: 10px 40px 10px 12px;
  border: 1px solid var(--border-color-primary);
  border-radius: 10px;
  background: var(--background-fill-primary);
  color: var(--body-text-color);
  appearance: none;
  -webkit-appearance: none;
}

.project-select:focus {
  outline: none;
  border-color: var(--border-color-accent);
  box-shadow: 0 0 0 3px rgba(29, 78, 216, 0.08);
}

.dropdown-icon {
  position: absolute;
  top: 50%;
  right: 12px;
  transform: translateY(-50%);
  color: var(--body-text-color-subdued);
  pointer-events: none;
}

.run-option {
  display: grid;
  grid-template-columns: 18px 10px minmax(0, 1fr);
  gap: 10px;
  align-items: start;
  padding: 10px 12px;
  border: 1px solid var(--border-color-primary);
  border-radius: 10px;
  background: var(--background-fill-primary);
  cursor: pointer;
}

.run-option input {
  margin: 2px 0 0;
  accent-color: var(--accent);
}

.run-color-dot {
  width: 10px;
  height: 10px;
  margin-top: 5px;
  border-radius: 999px;
  background: var(--accent);
}

.run-option-text strong,
.run-option-text span {
  display: block;
}

.run-option-text strong {
  color: var(--body-text-color);
  font-size: 14px;
  font-weight: 600;
}

.run-option-text span,
.sidebar-note,
.sidebar-empty {
  color: var(--body-text-color-subdued);
  font-size: 13px;
  line-height: 1.5;
}

.main-shell {
  display: flex;
  flex-direction: column;
  min-width: 0;
}

.navbar {
  display: flex;
  align-items: stretch;
  min-height: 44px;
  border-bottom: 1px solid var(--border-color-primary);
  background: var(--background-fill-primary);
}

.nav-spacer {
  flex: 1 1 0;
}

.nav-tabs {
  display: flex;
  padding-right: 8px;
}

.nav-link {
  padding: 10px 16px;
  border: none;
  border-bottom: 2px solid transparent;
  background: none;
  color: var(--body-text-color-subdued);
  cursor: pointer;
}

.nav-link.active {
  border-bottom-color: var(--body-text-color);
  color: var(--body-text-color);
  font-weight: 500;
}

.page {
  display: none;
  min-width: 0;
  padding: 24px 28px 36px;
}

.page.active {
  display: block;
}

.page-header {
  margin-bottom: 22px;
}

.page-header h1 {
  margin: 0;
  font-size: 32px;
  line-height: 1.1;
}

.page-subtitle {
  margin: 8px 0 0;
  color: var(--body-text-color-subdued);
  font-size: 15px;
}

.metrics-grid {
  display: grid;
  gap: 18px;
}

.metric-card {
  padding: 18px;
  border: 1px solid var(--border-color-primary);
  border-radius: 14px;
  background: var(--background-fill-primary);
  box-shadow: var(--shadow-soft);
}

.metric-card-head {
  display: flex;
  align-items: start;
  justify-content: space-between;
  gap: 16px;
}

.metric-card h3 {
  margin: 0;
  font-size: 18px;
}

.metric-run,
.metric-meta,
.metric-empty,
.metric-latest {
  color: var(--body-text-color-subdued);
  font-size: 13px;
}

.metric-latest {
  color: var(--body-text-color);
  max-width: 50%;
  font-size: 13px;
  font-weight: 600;
  text-align: right;
}

.plot-shell {
  margin-top: 14px;
  padding: 10px 12px;
  border: 1px solid var(--border-color-primary);
  border-radius: 12px;
  background: linear-gradient(180deg, #ffffff, #f9fafb);
}

.plot-shell svg {
  display: block;
  width: 100%;
  height: auto;
}

.plot-axis {
  stroke: var(--border-color-accent);
  stroke-width: 1.2;
}

.plot-line {
  fill: none;
  stroke-width: 2.25;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.plot-marker {
  fill: var(--background-fill-primary);
  stroke: var(--body-text-color);
  stroke-width: 1.5;
}

.metric-legend {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 14px;
  margin-top: 12px;
}

.metric-legend-item {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--body-text-color-subdued);
  font-size: 13px;
}

.metric-legend-dot {
  width: 10px;
  height: 10px;
  border-radius: 999px;
}

.traces-table-wrap {
  overflow: auto;
  border: 1px solid var(--border-color-primary);
  border-radius: 14px;
  background: var(--background-fill-primary);
  box-shadow: var(--shadow-soft);
}

.traces-table {
  width: 100%;
  border-collapse: collapse;
}

.traces-table thead {
  background: var(--background-fill-secondary);
}

.traces-table th,
.traces-table td {
  padding: 14px 16px;
  border-bottom: 1px solid var(--border-color-primary);
  text-align: left;
  vertical-align: top;
  font-size: 14px;
}

.traces-table th {
  color: var(--body-text-color-subdued);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.trace-summary-row {
  cursor: pointer;
}

.trace-summary-row:hover {
  background: var(--background-fill-secondary);
}

.trace-summary-row.expanded {
  background: var(--background-fill-secondary);
}

.trace-id {
  color: var(--body-text-color);
  font-family:
    ui-monospace,
    SFMono-Regular,
    Menlo,
    monospace;
  font-size: 12px;
}

.trace-request {
  max-width: 520px;
  color: var(--body-text-color);
}

.trace-detail-row td {
  padding: 0;
  background: var(--background-fill-secondary);
}

.trace-detail-shell {
  padding: 18px 20px;
  border-top: 1px solid var(--border-color-primary);
}

.trace-detail-head strong {
  display: block;
  color: var(--body-text-color);
  font-size: 14px;
}

.trace-detail-meta {
  margin-top: 4px;
  color: var(--body-text-color-subdued);
  font-size: 12px;
}

.trace-message-list {
  display: grid;
  gap: 12px;
  margin-top: 16px;
}

.trace-message {
  padding: 12px 14px;
  border: 1px solid var(--border-color-primary);
  border-radius: 12px;
  background: var(--background-fill-primary);
}

.trace-message-role {
  margin-bottom: 8px;
  color: var(--body-text-color-subdued);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.trace-message-text {
  color: var(--body-text-color);
  font-size: 14px;
  line-height: 1.55;
  white-space: pre-wrap;
  overflow-wrap: anywhere;
}

.trace-message-muted {
  color: var(--body-text-color-subdued);
}

.empty-row,
.empty-panel {
  color: var(--body-text-color-subdued);
  text-align: center;
}

.empty-panel {
  padding: 48px 20px;
  border: 1px dashed var(--border-color-accent);
  border-radius: 14px;
  background: var(--background-fill-primary);
}

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

  .sidebar {
    border-right: none;
    border-bottom: 1px solid var(--border-color-primary);
  }

  .sidebar-scroll {
    height: auto;
  }

  .page {
    padding: 18px;
  }
}