@import url("https://fonts.googleapis.com/css2?family=Fraunces:wght@600;700&family=Instrument+Sans:wght@400;500;600;700&display=swap");

:root {
  color-scheme: light;
  --font-sans: "Instrument Sans", "Segoe UI", Helvetica, Arial, sans-serif;
  --font-serif: "Fraunces", "Georgia", "Times New Roman", serif;
  --paper: #eef1f5;
  --surface: #ffffff;
  --ink: #1f2a37;
  --muted: #5b6673;
  --line: rgba(31, 42, 55, 0.12);
  --accent: #8b3a3a;
  --accent-strong: #6d2b2b;
  --accent-soft: rgba(139, 58, 58, 0.14);
  --accent-2: #1e3a8a;
  --accent-3: #065f46;
  --track: rgba(31, 42, 55, 0.1);
  --shadow-lg: 0 22px 50px rgba(31, 42, 55, 0.12);
  --shadow: 0 12px 24px rgba(31, 42, 55, 0.08);
  --radius-lg: 26px;
  --radius: 18px;
}

* {
  box-sizing: border-box;
}

[hidden] {
  display: none !important;
}

body {
  margin: 0;
  min-width: 320px;
  color: var(--ink);
  background:
    linear-gradient(140deg, rgba(139, 58, 58, 0.06) 0%, transparent 55%),
    repeating-linear-gradient(0deg, rgba(139, 58, 58, 0.02), rgba(139, 58, 58, 0.02) 1px, transparent 1px, transparent 6px),
    var(--paper);
  font-family: var(--font-sans);
  min-height: 100vh;
  display: flex;
  justify-content: center;
  padding: 2.5rem 1.5rem;
}

.shell {
  width: min(1360px, 100%);
  min-width: 0;
  background: var(--surface);
  border-radius: var(--radius-lg);
  border: 1px solid rgba(31, 42, 55, 0.08);
  box-shadow: var(--shadow-lg);
  overflow: hidden;
  animation: fade-up 0.45s ease-out both;
}

button,
select,
input {
  font: inherit;
}

button,
select,
input[type="number"] {
  border: 1px solid rgba(31, 42, 55, 0.16);
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.92);
  color: var(--ink);
}

button {
  min-height: 38px;
  padding: 0 14px;
  cursor: pointer;
  color: var(--accent-strong);
  font-weight: 750;
}

button:hover {
  border-color: var(--accent);
}

select,
input[type="number"] {
  min-height: 38px;
  padding: 0 2.1rem 0 0.85rem;
  width: 100%;
}

input[type="number"] {
  padding-right: 0.85rem;
}

button:focus-visible,
select:focus-visible,
input:focus-visible {
  outline: 3px solid rgba(139, 58, 58, 0.22);
  outline-offset: 2px;
}

.app-header {
  display: flex;
  align-items: end;
  justify-content: space-between;
  min-width: 0;
  gap: 24px;
  padding: 2.35rem 2.75rem 1.65rem;
  border-bottom: 1px solid rgba(31, 42, 55, 0.08);
}

.header-copy {
  flex: 1 1 900px;
  min-width: 0;
}

.app-header h1,
.app-header p {
  margin: 0;
}

.app-header h1 {
  font-family: var(--font-serif);
  margin: 0.45rem 0 0.8rem;
  font-size: clamp(2.1rem, 4vw, 3rem);
  line-height: 1.05;
  letter-spacing: -0.01em;
}

.intro-copy {
  max-width: 920px;
  margin: 0;
  color: var(--muted);
  line-height: 1.65;
  font-size: 1.02rem;
}

.intro-copy + .intro-copy {
  margin-top: 0.8rem;
}

.eyebrow {
  margin-bottom: 0.45rem;
  color: var(--accent-strong);
  font-size: 0.75rem;
  font-weight: 750;
  letter-spacing: 0.24em;
  text-transform: uppercase;
}

.demo-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.85rem 1.1rem;
  margin-bottom: 1.25rem;
}

.demo-nav a {
  color: var(--muted);
  font-size: 0.9rem;
  font-weight: 650;
  text-decoration: none;
}

.demo-nav a:hover,
.demo-nav a:focus-visible {
  color: var(--accent-strong);
}

.model-pickers {
  display: flex;
  align-items: end;
  gap: 10px;
  flex-wrap: wrap;
  justify-content: flex-end;
  min-width: 0;
}

.model-picker {
  display: grid;
  gap: 6px;
  min-width: 220px;
  color: var(--muted);
  font-size: 0.82rem;
  font-weight: 700;
}

.model-panel {
  display: grid;
  grid-template-columns: minmax(0, 380px) minmax(0, 1fr);
  align-items: end;
  gap: 1rem 1.35rem;
  padding: 1.15rem 1.35rem;
}

.model-panel .model-pickers {
  align-items: start;
  justify-content: flex-start;
  min-width: 0;
}

.model-panel .model-picker {
  flex: 1 1 230px;
  max-width: 360px;
}

.model-panel #modelSubtitle {
  min-width: 0;
  max-width: 620px;
  margin: 0;
  color: var(--muted);
  font-size: 0.92rem;
  line-height: 1.45;
  overflow-wrap: anywhere;
}

.what-panel {
  padding: 1.5rem 2.75rem;
  border-bottom: 1px solid rgba(31, 42, 55, 0.08);
  background: linear-gradient(120deg, rgba(139, 58, 58, 0.08), rgba(255, 255, 255, 0.92));
}

.what-panel > div {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.85rem 2.4rem;
  max-width: none;
}

.what-panel h2 {
  grid-column: 1 / -1;
  font-family: var(--font-serif);
  margin: 0 0 0.75rem;
  color: var(--accent-strong);
  font-size: 0.95rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
}

.what-panel p {
  margin: 0;
  color: var(--muted);
  line-height: 1.65;
}

.what-panel p + p {
  margin-top: 0;
}

.workspace {
  display: grid;
  grid-template-columns: minmax(320px, 390px) minmax(0, 1fr);
  gap: 1.25rem;
  padding: 1.35rem 2.75rem 2.75rem;
  min-width: 0;
}

.sidebar {
  align-self: start;
  position: sticky;
  top: 14px;
  min-width: 0;
}

.results {
  display: grid;
  gap: 16px;
  min-width: 0;
}

.panel,
.chart-card {
  min-width: 0;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.panel {
  padding: 1.35rem;
}

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

.panel-head h2,
.section-head h2,
.chart-card h3 {
  font-family: var(--font-serif);
  margin: 0;
  font-size: 0.88rem;
  line-height: 1.2;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--accent-strong);
}

.section-head {
  padding: 2px 2px 0;
}

.example-block {
  margin-bottom: 14px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--line);
}

.subhead {
  margin-bottom: 0.6rem;
  color: var(--muted);
  font-size: 0.78rem;
  font-weight: 750;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.preset-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.preset {
  background: var(--accent-soft);
  border-color: rgba(139, 58, 58, 0.18);
  color: var(--accent-strong);
  font-size: 0.86rem;
  font-weight: 750;
}

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

.evidence-row {
  display: grid;
  grid-template-areas:
    "label mode"
    "editor editor";
  grid-template-columns: minmax(0, 1fr) minmax(140px, auto);
  gap: 8px;
  align-items: start;
  padding: 10px;
  border: 1px solid rgba(31, 42, 55, 0.1);
  border-radius: 14px;
  background: rgba(238, 241, 245, 0.42);
}

.field-label {
  grid-area: label;
  min-width: 0;
}

.mode-select {
  grid-area: mode;
  justify-self: end;
  width: min(170px, 100%);
  min-width: 140px;
}

.field-label span {
  display: block;
  font-weight: 750;
  line-height: 1.25;
}

.field-label small {
  display: block;
  margin-top: 3px;
  color: var(--muted);
  font-size: 0.72rem;
  text-transform: uppercase;
}

.field-editor {
  grid-area: editor;
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 6px;
  width: 100%;
  min-width: 0;
}

.field-editor input[type="number"] {
  flex: 1 1 120px;
  min-width: 0;
}

.range-glue {
  flex: 0 0 auto;
  color: var(--muted);
  font-size: 0.8rem;
}

.readonly-pill {
  display: inline-flex;
  align-items: center;
  min-height: 34px;
  padding: 0 10px;
  border: 1px solid rgba(31, 42, 55, 0.1);
  border-radius: 12px;
  color: var(--muted);
  background: rgba(255, 255, 255, 0.68);
  font-size: 0.86rem;
}

.check-grid {
  display: grid;
  gap: 5px;
  width: 100%;
}

.check-item {
  display: flex;
  align-items: center;
  gap: 6px;
  color: var(--ink);
  font-size: 0.84rem;
  line-height: 1.15;
}

.chips {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  min-height: 34px;
  margin-bottom: 8px;
}

.chip {
  display: inline-flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 7px;
  max-width: 100%;
  min-height: 32px;
  padding: 0 10px;
  border: 1px solid rgba(139, 58, 58, 0.18);
  border-radius: 999px;
  background: var(--accent-soft);
  color: var(--accent-strong);
  font-size: 0.86rem;
}

.chip span {
  min-width: 0;
  overflow-wrap: anywhere;
}

.chip b {
  font-size: 0.78rem;
  text-transform: uppercase;
}

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

.metrics-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 10px;
}

.metric {
  min-width: 0;
  padding: 10px;
  border-radius: 14px;
  background: rgba(238, 241, 245, 0.52);
  border: 1px solid rgba(31, 42, 55, 0.1);
}

.metric span {
  display: block;
  color: var(--muted);
  font-size: 0.78rem;
  font-weight: 700;
}

.metric b {
  display: block;
  margin-top: 5px;
  overflow-wrap: anywhere;
  font-size: 1rem;
}

.term-tooltip,
.tooltip-label {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: 4px;
  max-width: 100%;
  cursor: help;
}

.term-tooltip {
  justify-content: center;
  width: 1rem;
  height: 1rem;
  margin-left: 6px;
  border: 1px solid rgba(109, 43, 43, 0.32);
  border-radius: 999px;
  color: var(--accent-strong);
  font-family: var(--font-sans);
  font-size: 0.68rem;
  font-weight: 800;
  letter-spacing: 0;
  line-height: 1;
  text-transform: none;
  vertical-align: 0.1em;
}

.metric .tooltip-label {
  display: inline-flex;
  width: fit-content;
}

.tooltip-label i {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 0.95rem;
  height: 0.95rem;
  border: 1px solid rgba(91, 102, 115, 0.32);
  border-radius: 999px;
  color: var(--muted);
  font-size: 0.64rem;
  font-style: normal;
  line-height: 1;
}

.term-tooltip::after,
.tooltip-label::after {
  position: absolute;
  left: 0;
  bottom: calc(100% + 8px);
  z-index: 20;
  width: min(270px, 72vw);
  padding: 8px 10px;
  border: 1px solid rgba(31, 42, 55, 0.12);
  border-radius: 8px;
  background: var(--ink);
  color: #ffffff;
  box-shadow: var(--shadow);
  content: attr(data-tooltip);
  font-family: var(--font-sans);
  font-size: 0.76rem;
  font-weight: 600;
  letter-spacing: 0;
  line-height: 1.35;
  opacity: 0;
  pointer-events: none;
  text-align: left;
  text-transform: none;
  transform: translateY(4px);
  transition: opacity 0.16s ease, transform 0.16s ease;
}

.term-tooltip:hover::after,
.term-tooltip:focus-visible::after,
.tooltip-label:hover::after,
.tooltip-label:focus-visible::after {
  opacity: 1;
  transform: translateY(0);
}

.term-tooltip:focus-visible,
.tooltip-label:focus-visible {
  outline: 3px solid rgba(139, 58, 58, 0.22);
  outline-offset: 3px;
}

.bar-row {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(72px, 2.2fr) minmax(44px, auto);
  gap: 9px;
  align-items: center;
  min-width: 0;
}

.bar-label {
  min-width: 0;
  overflow: hidden;
  color: var(--muted);
  font-size: 0.84rem;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.bar-row b {
  min-width: 0;
  overflow-wrap: anywhere;
  font-size: 0.82rem;
  text-align: right;
}

.bar-track {
  height: 9px;
  overflow: hidden;
  border-radius: 999px;
  background: var(--track);
}

.bar-track i {
  display: block;
  height: 100%;
  border-radius: inherit;
  background: var(--accent);
}

.query-note,
.panel-note,
.relationship-note,
.about-panel p {
  margin: -4px 0 14px;
  color: var(--muted);
  font-size: 0.9rem;
  line-height: 1.45;
}

.query-note {
  margin: 0 0 14px;
  font-size: 0.86rem;
}

.about-panel p {
  margin-bottom: 0;
}

.chart-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 330px), 1fr));
  gap: 14px;
}

.chart-card {
  min-width: 0;
  padding: 1.15rem;
}

.chart-card header {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 12px;
}

.chart-card header span {
  color: var(--muted);
  font-size: 0.8rem;
  text-align: right;
}

.bar-list {
  display: grid;
  gap: 7px;
}

.chart-card:nth-child(3n + 2) .bar-track i {
  background: var(--accent-2);
}

.chart-card:nth-child(3n) .bar-track i {
  background: var(--accent-3);
}

.relationship-controls {
  display: grid;
  grid-template-columns: minmax(140px, 1fr) minmax(140px, 1fr);
  gap: 10px;
  margin-bottom: 14px;
}

.relationship-controls label {
  display: grid;
  gap: 6px;
  color: var(--muted);
  font-size: 0.78rem;
  font-weight: 800;
  text-transform: uppercase;
}

.relationship-note {
  grid-column: 1 / -1;
  margin: 0;
  text-transform: none;
  font-weight: 500;
}

.sample-controls {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  align-items: center;
  gap: 10px;
}

.sample-size-control {
  display: inline-grid;
  grid-template-columns: auto minmax(86px, 1fr);
  align-items: center;
  gap: 7px;
  color: var(--muted);
  font-size: 0.78rem;
  font-weight: 800;
  text-transform: uppercase;
}

.sample-size-control select {
  min-width: 86px;
}

.relationship-plot {
  min-height: 250px;
  max-width: 100%;
  overflow-x: auto;
}

.plot-title {
  margin-bottom: 10px;
  color: var(--muted);
  font-size: 0.88rem;
  font-weight: 700;
}

.plot-note {
  margin: -4px 0 12px;
  color: var(--muted);
  font-size: 0.8rem;
  line-height: 1.4;
}

.scatter-plot {
  display: block;
  width: 100%;
  height: auto;
  border: 1px solid rgba(31, 42, 55, 0.1);
  border-radius: 16px;
  background: rgba(238, 241, 245, 0.3);
}

.scatter-plot .axis {
  stroke: #9ba8a9;
  stroke-width: 1.4;
}

.box-plot {
  display: block;
  width: 100%;
  height: auto;
  min-width: 560px;
}

.box-plot .axis {
  stroke: #9ba8a9;
  stroke-width: 1.4;
}

.box-label {
  fill: var(--muted);
  font-size: 14px;
  font-weight: 650;
}

.box-whisker,
.box-cap {
  stroke: rgba(139, 58, 58, 0.7);
  stroke-width: 2;
  stroke-linecap: round;
}

.box-iqr {
  fill: rgba(139, 58, 58, 0.18);
  stroke: var(--accent);
  stroke-width: 2;
}

.box-median {
  stroke: var(--accent-strong);
  stroke-width: 3;
  stroke-linecap: round;
}

.scatter-plot .axis-label,
.scatter-plot .tick-label,
.box-plot .tick-label {
  fill: var(--muted);
  font-size: 13px;
}

.scatter-plot .axis-label {
  font-weight: 800;
}

.scatter-plot .tick-label.end {
  text-anchor: end;
}

.scatter-points circle {
  fill: var(--accent);
  opacity: 0.46;
}

.relationship-bars .bar-row {
  grid-template-columns: minmax(0, 1.1fr) minmax(72px, 2fr) minmax(90px, auto);
}

.contingency-table {
  min-width: 520px;
}

.contingency-table td span {
  display: block;
  margin-top: 3px;
  color: var(--muted);
  font-size: 0.75rem;
}

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

table {
  width: 100%;
  min-width: 760px;
  border-collapse: collapse;
}

th,
td {
  padding: 9px 10px;
  border-bottom: 1px solid rgba(31, 42, 55, 0.09);
  text-align: left;
  white-space: nowrap;
}

th {
  color: var(--muted);
  font-size: 0.78rem;
  text-transform: uppercase;
}

td {
  font-size: 0.9rem;
}

.empty-panel,
.fatal {
  padding: 18px;
  color: var(--muted);
}

@media (max-width: 980px) {
  .app-header {
    align-items: stretch;
    flex-direction: column;
  }

  .header-copy {
    flex-basis: auto;
  }

  .model-pickers,
  .model-picker {
    min-width: 0;
  }

  .model-pickers {
    align-items: stretch;
    justify-content: stretch;
  }

  .model-panel {
    grid-template-columns: 1fr;
  }

  .model-panel .model-picker {
    max-width: none;
  }

  .what-panel {
    padding: 1.25rem 1.35rem;
  }

  .what-panel > div {
    grid-template-columns: 1fr;
  }

  .what-panel p + p {
    margin-top: 0.85rem;
  }

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

  .sidebar {
    position: static;
  }

  .metrics-grid,
  .chart-grid,
  .relationship-controls {
    grid-template-columns: 1fr;
  }

  .relationship-note {
    grid-column: auto;
  }
}

@media (max-width: 620px) {
  .workspace {
    padding: 12px 10px 24px;
  }

  .panel,
  .chart-card {
    padding: 12px;
  }

  .evidence-row {
    grid-template-areas:
      "label"
      "mode"
      "editor";
    grid-template-columns: 1fr;
  }

  .mode-select {
    justify-self: stretch;
    width: 100%;
  }

  .field-editor {
    align-items: stretch;
  }

  .bar-row {
    grid-template-columns: minmax(0, 1fr);
    gap: 4px;
  }

  .bar-label {
    overflow: visible;
    text-overflow: clip;
    white-space: normal;
    overflow-wrap: anywhere;
  }

  .bar-row b {
    text-align: left;
  }
}