/* Project website for "Local goodness-of-fit measures for neural decoding".
   Colors follow the hues of the paper's figures (statespacecheck_paper.style):
   Wong palette, predictive blue, likelihood orange, posterior black, animal
   position magenta. */

:root {
  color-scheme: light;

  --surface: #ffffff;
  --surface-muted: #f5f5f3;
  --surface-sunken: #eeeeec;
  --border: #dcdcd8;
  --grid: #e6e6e3;

  --text: #1b1b1b;
  --text-secondary: #4a4a4a;
  --text-muted: #6b6b6b;
  --link: #005a8c;

  --predictive: #0072b2;
  --likelihood: #b67e00;
  --posterior: #000000;
  --position: #f000f0;
  --threshold: #666666;
  --hpd: #4590ba;
  --pvalue: #be719b;
  --kl: #009c72;
  /* Likelihood, position, and the three metric colors are the figures' colors
     (#e69f00, #ff00ff, #56b4e9, #cc79a7, #009e73) darkened to 3:1 contrast
     (WCAG 1.4.11) against --surface, --surface-muted, and --surface-sunken:
     each channel scaled by the largest hundredth that reaches it (0.79, 0.94,
     0.80, 0.93, 0.99). tests/contrast.test.mjs checks the marks' contrast. */
  /* Unselected place fields: 3.4:1 against the panel, enough for graphics. */
  --curve-muted: #858581;
  /* Place fields in the filter explainer: the cell that fired, and the rest. */
  --field: #4a4a4a;
  --field-muted: #cfcfca;

  --flag-bg: #fdecea;
  --flag-text: #8a1c12;
  --ok-bg: #e8f3ec;
  --ok-text: #1d5e36;

  --radius: 6px;
  --content: 960px;
  --label-col: 118px;

  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial,
    sans-serif;
  --mono: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--surface);
  color: var(--text);
  font-family: var(--font);
  font-size: 17px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

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

img {
  max-width: 100%;
  height: auto;
}

h1,
h2,
h3 {
  line-height: 1.25;
  text-wrap: balance;
}

h2 {
  font-size: 1.6rem;
  margin: 0 0 0.75rem;
}

h3 {
  font-size: 1.1rem;
  margin: 0 0 0.4rem;
}

p {
  margin: 0 0 1rem;
}

.wrap {
  max-width: var(--content);
  margin: 0 auto;
  padding: 0 16px;
}

section {
  padding: 3rem 0;
  border-top: 1px solid var(--grid);
}

.lede {
  font-size: 1.15rem;
  color: var(--text-secondary);
}

.note {
  font-size: 0.9rem;
  color: var(--text-muted);
}

/* ------------------------------------------------------------- Skip link */

.skip-link {
  position: absolute;
  left: 16px;
  top: -100px;
  z-index: 10;
  padding: 0.5rem 1rem;
  background: var(--surface);
  color: var(--link);
  border: 2px solid var(--link);
  border-radius: var(--radius);
}

.skip-link:focus {
  top: 16px;
}

/* The skip link's target takes focus only programmatically. */
main:focus {
  outline: none;
}

/* ---------------------------------------------------------------- Header */

.hero {
  padding: 3.5rem 0 2.5rem;
  text-align: center;
}

.hero h1 {
  font-size: clamp(1.9rem, 4.5vw, 2.8rem);
  margin: 0 0 1.25rem;
  letter-spacing: -0.01em;
}

.authors {
  font-size: 1.1rem;
  margin: 0 0 0.4rem;
}

.authors .author {
  white-space: nowrap;
  margin: 0 0.35rem;
}

.authors a {
  color: var(--text);
  text-decoration: none;
  border-bottom: 1px solid var(--border);
}

.authors a:hover {
  border-bottom-color: var(--text);
}

.affiliations {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin: 0 auto 1.5rem;
  max-width: 760px;
}

.affiliations span {
  display: inline-block;
  margin: 0 0.4rem;
}

.links {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.6rem;
}

.button {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  padding: 0.5rem 1rem;
  border-radius: 999px;
  background: var(--text);
  color: #ffffff;
  font-size: 0.95rem;
  font-weight: 600;
  text-decoration: none;
  border: 1px solid var(--text);
}

.button:hover {
  background: #3a3a3a;
}

/* A resource without a link yet, shown as plain text. */
.button.pending {
  background: var(--surface);
  color: var(--text-muted);
  border-color: var(--border);
}

.button svg {
  width: 1em;
  height: 1em;
  fill: currentColor;
}

/* --------------------------------------------------------------- Figures */

figure {
  margin: 1.5rem 0 0;
}

figcaption {
  font-size: 0.9rem;
  color: var(--text-secondary);
  margin-top: 0.6rem;
}

.teaser img {
  display: block;
  margin: 0 auto;
  max-width: 560px;
  width: 100%;
}

/* -------------------------------------------------------------- Controls */

.panel {
  background: var(--surface-muted);
  border: 1px solid var(--grid);
  border-radius: 10px;
  padding: 1.25rem;
  margin-top: 1.25rem;
}

.controls {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 0.75rem 1.5rem;
  margin-bottom: 1rem;
}

.control-head {
  display: flex;
  justify-content: space-between;
  gap: 0.5rem;
  font-size: 0.9rem;
}

.control-head label,
.control-name {
  font-weight: 600;
}

.control-head output,
#pg-cell-out {
  color: var(--text-secondary);
  font-variant-numeric: tabular-nums;
  text-align: right;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  /* A fieldset is otherwise at least as wide as its content. */
  min-inline-size: 0;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

input[type="range"] {
  width: 100%;
  accent-color: var(--text);
}

.segmented {
  display: inline-flex;
  flex-wrap: wrap;
  gap: 0.35rem;
}

.chip {
  font: inherit;
  font-size: 0.88rem;
  padding: 0.3rem 0.8rem;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text);
  cursor: pointer;
}

.chip:hover {
  border-color: var(--text-muted);
}

.chip.primary {
  background: var(--text);
  border-color: var(--text);
  color: #ffffff;
  font-weight: 600;
}

.chip.primary:hover {
  background: #3a3a3a;
}

.chip:disabled {
  opacity: 0.45;
  cursor: default;
}

.chip:disabled:hover {
  border-color: var(--border);
}

.chip[aria-pressed="true"],
.chip[aria-selected="true"] {
  background: var(--text);
  border-color: var(--text);
  color: #ffffff;
}

.chip:focus-visible,
.button:focus-visible,
input:focus-visible,
summary:focus-visible,
.table-wrap:focus-visible,
[role="tabpanel"]:focus-visible,
.stack:focus-visible {
  outline: 2px solid var(--link);
  outline-offset: 2px;
}

/* The visually hidden cell radio outlines its field in the SVG strip. */
.dist-chart .cell-hit.focused {
  stroke: var(--link);
  stroke-width: 2;
}

.row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem 1rem;
  margin-bottom: 0.9rem;
}

.row-label {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-secondary);
}

/* ---------------------------------------------------------------- Legend */

.legend {
  display: flex;
  flex-wrap: wrap;
  gap: 0.3rem 1.1rem;
  font-size: 0.85rem;
  color: var(--text-secondary);
  margin: 0.25rem 0 0.5rem;
}

.legend > span {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
}

.swatch {
  width: 18px;
  height: 3px;
  border-radius: 2px;
  display: inline-block;
}

.swatch.dot {
  width: 9px;
  height: 9px;
  border-radius: 50%;
}

.swatch.ring {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: transparent !important;
  border: 2px solid;
}

.swatch.band {
  height: 8px;
  opacity: 0.35;
}

.swatch.dashed {
  background: repeating-linear-gradient(90deg, var(--posterior) 0 5px, transparent 5px 8px);
}

.swatch.dashed.muted {
  background: repeating-linear-gradient(90deg, var(--curve-muted) 0 5px, transparent 5px 8px);
}

/* ------------------------------------------------------ Filter explainer */

#ft-caption {
  min-height: 6.4em;
}

/* ------------------------------------------------------ Distribution chart */

.dist-chart {
  width: 100%;
  height: auto;
  display: block;
  overflow: visible;
}

.dist-chart text {
  font-family: var(--font);
  font-size: 12px;
  fill: var(--text-muted);
}

.dist-chart .axis line,
.dist-chart .axis path {
  stroke: var(--border);
}

.dist-chart .cell-hit {
  cursor: pointer;
}

.dist-chart .cell-hit:hover {
  fill: rgb(0 0 0 / 4%);
}

/* --------------------------------------------------------- Metric readouts */

.readouts {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 0.75rem;
  margin-top: 1rem;
}

.readout {
  background: var(--surface);
  border: 1px solid var(--grid);
  border-radius: var(--radius);
  padding: 0.7rem 0.85rem;
  border-top: 3px solid var(--metric-color, var(--border));
}

.readout .name {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-secondary);
}

.readout .value {
  font-size: 1.6rem;
  font-weight: 600;
  font-variant-numeric: tabular-nums;
  line-height: 1.3;
}

.readout .rule {
  font-size: 0.78rem;
  color: var(--text-muted);
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  font-size: 0.78rem;
  font-weight: 600;
  padding: 0.05rem 0.5rem;
  border-radius: 999px;
  vertical-align: middle;
}

.badge.flagged {
  background: var(--flag-bg);
  color: var(--flag-text);
}

.badge.ok {
  background: var(--ok-bg);
  color: var(--ok-text);
}

.verdict {
  margin: 1rem 0 0;
  padding: 0.7rem 0.9rem;
  background: var(--surface);
  border-left: 3px solid var(--text);
  border-radius: 0 var(--radius) var(--radius) 0;
  font-size: 0.95rem;
}

.table-wrap {
  overflow-x: auto;
  margin-top: 1rem;
}

.compare-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
  font-variant-numeric: tabular-nums;
  background: var(--surface);
  border-radius: var(--radius);
}

.compare-table th,
.compare-table td {
  text-align: left;
  padding: 0.45rem 0.6rem;
  border-bottom: 1px solid var(--grid);
}

.compare-table th {
  font-weight: 600;
  color: var(--text-secondary);
}

/* Row headers keep the look of the table's values. */
.compare-table tbody th {
  font-weight: normal;
  color: var(--text);
}

.compare-table caption {
  text-align: left;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-secondary);
  padding: 0 0 0.3rem;
}

/* ------------------------------------------------------ Diagnostic cards */

.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1rem;
  margin-top: 1.25rem;
}

.card {
  border: 1px solid var(--grid);
  border-radius: 10px;
  padding: 1.1rem 1.1rem 0.6rem;
  border-top: 4px solid var(--metric-color);
}

.card p {
  font-size: 0.95rem;
}

/* Fraction bars reach a few pixels past a formula's box; the padding holds
   them, so the formula scrolls only sideways, when it is wider than the card. */
.card math {
  display: block;
  margin: 0.6rem 0 0.9rem;
  padding: 0.25em 0;
  font-size: 1.05rem;
  overflow-x: auto;
  overflow-y: hidden;
}

/* ----------------------------------------------------------- Track stack */

.stack {
  position: relative;
  user-select: none;
  touch-action: pan-y;
  margin-top: 0.5rem;
}

.track {
  display: grid;
  /* minmax(0, …): a canvas's pixel size must not set the column's minimum. */
  grid-template-columns: var(--label-col) minmax(0, 1fr);
  align-items: stretch;
}

.track + .track {
  margin-top: 4px;
}

.track-label {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  padding-right: 8px;
  font-size: 0.72rem;
  color: var(--text-muted);
  text-align: right;
  line-height: 1.15;
}

.track-label .direction {
  display: block;
  font-size: 0.68rem;
  color: var(--text-muted);
  white-space: nowrap;
}

.spike-table {
  margin-top: 1rem;
  font-size: 0.9rem;
}

.spike-table summary {
  cursor: pointer;
  color: var(--text-secondary);
}

.spike-table .table-wrap {
  max-height: 24rem;
  overflow-y: auto;
  margin-top: 0.5rem;
}

.spike-table thead th {
  position: sticky;
  top: 0;
  background: var(--surface);
}

.compare-table .rule {
  font-size: 0.75rem;
  color: var(--text-muted);
}

.track-label .name {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-secondary);
}

.track canvas {
  width: 100%;
  min-width: 0;
  display: block;
  cursor: crosshair;
}

.stack .cursor {
  position: absolute;
  top: 0;
  bottom: 22px;
  width: 0;
  border-left: 1.5px solid var(--text);
  pointer-events: none;
  display: none;
}

.transport {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
  margin-top: 0.6rem;
  font-size: 0.88rem;
  color: var(--text-secondary);
}

.transport .time {
  font-variant-numeric: tabular-nums;
  margin-left: auto;
}

.player-body {
  display: grid;
  grid-template-columns: minmax(0, 1.55fr) minmax(0, 1fr);
  gap: 1.25rem;
  align-items: start;
}

.detail h3 {
  font-size: 0.95rem;
}

.detail .readouts {
  grid-template-columns: 1fr;
  gap: 0.5rem;
}

/* In the detail panel the name and rule stack on the left, the value sits right. */
.detail .readout {
  display: grid;
  grid-template-columns: 1fr auto;
  grid-template-areas:
    "name value"
    "rule value";
  align-items: center;
  column-gap: 0.6rem;
  padding: 0.45rem 0.7rem;
}

.detail .readout .name {
  grid-area: name;
}

.detail .readout .rule {
  grid-area: rule;
}

.detail .readout .value {
  grid-area: value;
  font-size: 1.1rem;
}

.stat-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 0.6rem;
  margin: 0.75rem 0 0.25rem;
}

.stat {
  background: var(--surface);
  border: 1px solid var(--grid);
  border-radius: var(--radius);
  padding: 0.5rem 0.7rem;
}

.stat .label {
  font-size: 0.78rem;
  color: var(--text-muted);
}

.stat .value {
  font-size: 1.25rem;
  font-weight: 600;
  font-variant-numeric: tabular-nums;
}

.condition-text {
  min-height: 3.2em;
}

.loading {
  color: var(--text-muted);
  font-style: italic;
}

.error {
  color: var(--flag-text);
}

/* --------------------------------------------------------------- Lists */

.takeaways {
  padding-left: 1.2rem;
}

.takeaways li {
  margin-bottom: 0.6rem;
}

pre.bibtex {
  background: var(--surface-muted);
  border: 1px solid var(--grid);
  border-radius: var(--radius);
  padding: 1rem;
  overflow-x: auto;
  font-family: var(--mono);
  font-size: 0.85rem;
  line-height: 1.45;
  /* Wrap on narrow screens rather than scroll; copying keeps the line breaks. */
  white-space: pre-wrap;
  overflow-wrap: anywhere;
}

.copy {
  float: right;
}

footer {
  border-top: 1px solid var(--grid);
  padding: 2rem 0 3rem;
  font-size: 0.85rem;
  color: var(--text-muted);
}

/* ------------------------------------------------------------- Mobile */

@media (max-width: 900px) {
  .player-body {
    grid-template-columns: minmax(0, 1fr);
  }
}

@media (max-width: 760px) {
  body {
    font-size: 16px;
  }

  :root {
    --label-col: 84px;
  }

  section {
    padding: 2.25rem 0;
  }

  .panel {
    padding: 0.9rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
}