:root {
  --bg: #f6f4ef;
  --surface: #fffdfa;
  --surface-2: #eef4f2;
  --text: #1b1d1f;
  --muted: #687076;
  --line: #d8d5cc;
  --teal: #14746f;
  --green: #4f8a5b;
  --blue: #385f9f;
  --red: #b54747;
  --amber: #b7791f;
  --ink: #202124;
  --shadow: 0 16px 40px rgba(25, 31, 38, 0.09);
}

* {
  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", sans-serif;
  line-height: 1.45;
}

button,
input,
select {
  font: inherit;
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 22px clamp(18px, 4vw, 52px);
  border-bottom: 1px solid var(--line);
  background: rgba(255, 253, 250, 0.92);
  position: sticky;
  top: 0;
  z-index: 10;
  backdrop-filter: blur(12px);
}

.eyebrow {
  margin: 0 0 4px;
  color: var(--teal);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0;
  text-transform: uppercase;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1 {
  margin-bottom: 0;
  font-size: clamp(26px, 3vw, 38px);
  letter-spacing: 0;
}

h2 {
  margin-bottom: 14px;
  font-size: 24px;
  letter-spacing: 0;
}

h3 {
  margin-bottom: 10px;
  font-size: 16px;
  letter-spacing: 0;
}

.top-actions,
.inline-actions,
.model-actions,
.filter-row {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px;
}

.app-shell {
  max-width: 1480px;
  margin: 0 auto;
  padding: 24px clamp(16px, 4vw, 52px) 52px;
}

.nav-link,
.ghost-button,
.primary-button,
.small-button,
.dataset-tab {
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--surface);
  color: var(--ink);
  cursor: pointer;
  min-height: 36px;
  padding: 8px 12px;
  text-decoration: none;
  transition: border-color 0.15s ease, background 0.15s ease, transform 0.15s ease;
}

.nav-link:hover,
.ghost-button:hover,
.primary-button:hover,
.small-button:hover,
.dataset-tab:hover {
  border-color: var(--teal);
  transform: translateY(-1px);
}

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

.small-button {
  min-height: 30px;
  padding: 5px 9px;
  font-size: 13px;
}

.dataset-tabs {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  padding-bottom: 6px;
  margin-bottom: 18px;
}

.dataset-tab {
  white-space: nowrap;
}

.dataset-tab.active {
  background: var(--ink);
  color: #fff;
  border-color: var(--ink);
}

.summary-grid,
.chart-grid,
.detail-grid {
  display: grid;
  gap: 16px;
}

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

.chart-grid {
  grid-template-columns: minmax(0, 1.35fr) minmax(320px, 0.65fr);
  margin-bottom: 18px;
}

.detail-grid {
  grid-template-columns: minmax(0, 0.9fr) minmax(360px, 1.1fr);
}

.panel,
.metric,
.sample-list,
.json-box,
.answer-box {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: var(--shadow);
}

.panel,
.metric {
  padding: 16px;
}

.metric .label {
  color: var(--muted);
  font-size: 13px;
  margin-bottom: 8px;
}

.metric .value {
  font-size: 30px;
  font-weight: 750;
}

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

.split-stack {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 8px;
}

.split-pill {
  border-radius: 6px;
  border: 1px solid var(--line);
  padding: 10px;
  background: var(--surface-2);
}

.split-pill strong {
  display: block;
  font-size: 18px;
}

.chart {
  width: 100%;
  min-height: 260px;
}

.legend {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 14px;
  margin-top: 10px;
  color: var(--muted);
  font-size: 13px;
}

.legend span {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.swatch {
  width: 12px;
  height: 12px;
  border-radius: 3px;
  display: inline-block;
}

.dataset-row {
  display: grid;
  grid-template-columns: minmax(220px, 1fr) minmax(260px, 2fr) auto;
  gap: 12px;
  align-items: center;
  border-top: 1px solid var(--line);
  padding: 12px 0;
}

.dataset-row:first-child {
  border-top: 0;
}

.stack-bar {
  display: flex;
  width: 100%;
  min-height: 14px;
  overflow: hidden;
  border-radius: 4px;
  background: #ece8df;
}

.stack-bar span {
  min-width: 2px;
}

.sample-browser {
  display: grid;
  grid-template-columns: 340px minmax(0, 1fr);
  gap: 16px;
  margin-top: 18px;
}

.sample-list {
  max-height: 720px;
  overflow: auto;
}

.sample-card {
  display: block;
  width: 100%;
  border: 0;
  border-bottom: 1px solid var(--line);
  background: transparent;
  text-align: left;
  padding: 12px;
  cursor: pointer;
}

.sample-card.active,
.sample-card:hover {
  background: var(--surface-2);
}

.sample-card strong {
  display: block;
  margin-bottom: 4px;
}

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

.detail-title {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 18px;
}

.tag-row {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin: 8px 0 0;
}

.tag {
  display: inline-flex;
  align-items: center;
  min-height: 26px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: var(--surface-2);
  color: var(--ink);
  padding: 3px 9px;
  font-size: 12px;
}

.json-box,
.answer-box {
  padding: 14px;
  overflow: auto;
}

pre {
  margin: 0;
  white-space: pre-wrap;
  word-break: break-word;
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  font-size: 12px;
}

select,
input {
  min-height: 36px;
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 7px 10px;
  background: var(--surface);
  color: var(--ink);
}

.model-box {
  margin-top: 16px;
}

.model-output {
  margin-top: 10px;
  border-radius: 8px;
  border: 1px solid var(--line);
  background: #f9fbfb;
  padding: 12px;
  min-height: 80px;
}

.loading,
.error-state {
  min-height: 260px;
  display: grid;
  place-items: center;
  text-align: center;
}

@media (max-width: 980px) {
  .summary-grid,
  .chart-grid,
  .detail-grid,
  .sample-browser {
    grid-template-columns: 1fr;
  }

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

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