:root {
  --bg: #f8fafc;
  --surface: #ffffff;
  --ink: #0f172a;
  --muted: #475569;
  --line: #cbd5e1;
  --accent: #0b3a67;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: "Segoe UI", "Helvetica Neue", Arial, sans-serif;
  line-height: 1.45;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.container {
  width: min(1120px, 95vw);
  margin: 0 auto;
}

.page-content {
  flex: 1;
}

.site-header {
  background: var(--surface);
  border-bottom: 1px solid var(--line);
  position: sticky;
  top: 0;
  z-index: 10;
}

.site-title {
  margin: 0;
  padding: 0.75rem 0;
  font-size: 1.75rem;
}

.site-title a {
  color: var(--ink);
  text-decoration: none;
}

.site-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem;
  padding-bottom: 0.85rem;
}

.site-nav a {
  color: var(--accent);
  text-decoration: none;
  font-size: 0.95rem;
}

.site-nav a:hover {
  text-decoration: underline;
}

.card {
  margin: 1.2rem 0;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 1rem;
}

.disclaimer-card {
  border-left: 4px solid var(--accent);
  background: #f8fbff;
}

.disclaimer-card p {
  margin: 0;
}

.chart-wrap {
  margin-top: 0.75rem;
  height: 360px;
}

.chart-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.75rem;
  margin-top: 0.75rem;
}

.filter-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
  margin-top: 0.75rem;
}

.filter-bar label {
  font-weight: 600;
}

.filter-bar select {
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--surface);
  color: var(--ink);
  padding: 0.4rem 0.5rem;
}

.chart-wrap-half {
  height: 320px;
}

.chart-legend {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.25rem 0.75rem;
  margin-top: 0.5rem;
}

.chart-legend-item {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  cursor: pointer;
  user-select: none;
  font-size: 0.75rem;
  color: var(--ink);
}

.chart-legend-item input[type="checkbox"] {
  accent-color: var(--swatch-color, var(--accent));
  width: 0.9rem;
  height: 0.9rem;
  cursor: pointer;
  flex-shrink: 0;
}

.chart-legend-item.is-hidden label {
  text-decoration: line-through;
  opacity: 0.5;
}

h2,
h3 {
  margin-top: 0;
}

table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 0.75rem;
}

th,
td {
  border: 1px solid var(--line);
  padding: 0.5rem;
  text-align: left;
  vertical-align: top;
  font-size: 0.95rem;
}

th {
  background: #f1f5f9;
}

.sort-button {
  border: 0;
  background: transparent;
  color: inherit;
  font: inherit;
  font-weight: 700;
  cursor: pointer;
  padding: 0;
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
}

.sort-button::after {
  content: "▲▼";
  font-size: 0.55rem;
  line-height: 1;
  letter-spacing: -0.15rem;
  color: #64748b;
}

.sort-button--no-caret::after {
  content: none;
}

.sort-caret {
  font-size: 0.55rem;
  line-height: 1;
  letter-spacing: -0.15rem;
  color: #64748b;
}

.header-with-tooltip {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
}

.tooltip-wrap {
  position: relative;
  display: inline-flex;
  align-items: center;
}

.info-icon-button {
  width: 1rem;
  height: 1rem;
  border: 1px solid #64748b;
  border-radius: 50%;
  background: #ffffff;
  color: #334155;
  font-size: 0.7rem;
  line-height: 1;
  font-weight: 700;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: help;
  padding: 0;
}

.tooltip-text {
  position: absolute;
  left: 50%;
  bottom: calc(100% + 0.5rem);
  transform: translateX(-50%);
  background: #0f172a;
  color: #f8fafc;
  border-radius: 6px;
  padding: 0.45rem 0.55rem;
  font-size: 0.78rem;
  font-weight: 400;
  line-height: 1.3;
  width: max-content;
  max-width: min(22rem, 75vw);
  box-shadow: 0 8px 24px rgba(15, 23, 42, 0.25);
  visibility: hidden;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.15s ease;
  z-index: 5;
}

.tooltip-wrap:hover .tooltip-text,
.tooltip-wrap:focus-within .tooltip-text {
  visibility: visible;
  opacity: 1;
}

/* Tippy.js custom theme to match the existing tooltip style */
.tippy-box[data-theme~='site'] {
  background-color: #0f172a;
  color: #f8fafc;
  border-radius: 6px;
  font-size: 0.78rem;
  font-weight: 400;
  line-height: 1.3;
  box-shadow: 0 8px 24px rgba(15, 23, 42, 0.25);
}

.tippy-box[data-theme~='site'] .tippy-content {
  padding: 0.45rem 0.55rem;
}

.tippy-box[data-theme~='site'] .tippy-content a {
  color: #ff8a80;
}

.tippy-box[data-theme~='site'][data-placement^='top'] > .tippy-arrow::before {
  border-top-color: #0f172a;
}

.tippy-box[data-theme~='site'][data-placement^='bottom'] > .tippy-arrow::before {
  border-bottom-color: #0f172a;
}

.tippy-box[data-theme~='site'][data-placement^='left'] > .tippy-arrow::before {
  border-left-color: #0f172a;
}

.tippy-box[data-theme~='site'][data-placement^='right'] > .tippy-arrow::before {
  border-right-color: #0f172a;
}

.result-col {
  text-align: center;
}

.table-key {
  margin-top: 0.75rem;
  color: var(--muted);
  font-size: 0.92rem;
}

a {
  color: var(--accent);
}

.icon-link {
  text-decoration: none;
  font-size: 1.05rem;
}

.search-label {
  display: block;
  font-weight: 600;
}

.search-input {
  margin-top: 0.35rem;
  width: min(400px, 100%);
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 0.45rem 0.6rem;
}

.run-meta {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 0.5rem;
  margin: 0.75rem 0;
}

.run-meta dt {
  font-weight: 700;
}

.run-meta dd {
  margin: 0.2rem 0 0;
  color: var(--muted);
}

pre {
  background: #0f172a;
  color: #e2e8f0;
  padding: 0.75rem;
  border-radius: 6px;
  overflow-x: auto;
}

.site-footer {
  border-top: 1px solid var(--line);
  background: var(--surface);
}

.site-footer .container {
  padding: 0.75rem 0 0.45rem;
  text-align: right;
  color: var(--muted);
  font-size: 0.82rem;
}

.footer-logos {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 2rem;
  margin-bottom: 0.5rem;
}

.footer-logo {
  height: 40px;
  width: auto;
  opacity: 0.85;
  transition: opacity 0.15s;
}

.footer-logo:hover {
  opacity: 1;
}

/* Keep in-page anchors visible below the sticky site header. */
:target {
  scroll-margin-top: 7rem;
}

.citation-ref {
  color: var(--accent);
  white-space: nowrap;
}

.scatter-controls {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 1rem;
}

.scatter-venue-key {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.5rem 1.5rem;
  margin-top: 0.75rem;
  font-size: 0.85rem;
  color: var(--muted);
}

.scatter-venue-key-item::before {
  margin-right: 0.3rem;
}

.scatter-venue-key-item.scatter-shape-star::before {
  content: "★";
}

.scatter-venue-key-item.scatter-shape-triangle::before {
  content: "▲";
}

.scatter-venue-key-item.scatter-shape-rectRot::before {
  content: "◆";
}

.scatter-venue-key-item.scatter-shape-rect::before {
  content: "■";
}

.scatter-venue-key-item.scatter-shape-circle::before {
  content: "●";
}

.scatter-venue-key-item.scatter-shape-cross::before {
  content: "✚";
}

.scatter-venue-key-item.scatter-shape-crossRot::before {
  content: "✖";
}

.scatter-venue-key-item.scatter-shape-rectRounded::before {
  content: "▪";
}

.scatter-venue-key-item.scatter-shape-dash::before {
  content: "—";
}

@media (max-width: 640px) {
  .chart-wrap {
    height: 300px;
  }

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

  th,
  td {
    font-size: 0.88rem;
    padding: 0.4rem;
  }
}

/* About page */
.bio-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1.5rem;
  margin-top: 0.5rem;
}

.bio-card {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.bio-photo {
  width: 100%;
  aspect-ratio: 1 / 1;
  object-fit: cover;
  object-position: center top;
  border-radius: 6px;
  display: block;
}

.bio-card h3 {
  margin: 0;
  font-size: 1rem;
}

.bio-card .bio-email {
  font-size: 0.875rem;
  color: var(--muted);
}

@media (max-width: 640px) {
  .bio-grid {
    grid-template-columns: 1fr;
  }
}

/* Methods page source papers */
.paper-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1.5rem;
  margin-top: 0.5rem;
}

.paper-card {
  display: flex;
  gap: 1rem;
  align-items: flex-start;
}

.paper-icon {
  width: 48px;
  height: 48px;
  object-fit: contain;
  flex-shrink: 0;
}

.paper-info h3 {
  margin: 0 0 0.25rem;
  font-size: 1rem;
}

.paper-venue {
  margin: 0 0 0.35rem;
  font-size: 0.875rem;
  color: var(--muted);
}

.paper-links {
  margin: 0;
  font-size: 0.9rem;
}

@media (max-width: 640px) {
  .paper-grid {
    grid-template-columns: 1fr;
  }
}