/* ==========================================================================
   StreamMAE project page
   Colour roles: blue = i.i.d. reference, orange = ours, warm gray = other methods.
   ========================================================================== */

:root {
  /* Surfaces, warm neutrals, not cold slate */
  --page:            #f9f9f7;   /* odd sections */
  --band:            #efeee6;   /* even sections, alternating, deliberately faint */
  --surface:         #fcfcfb;   /* cards, lifted off both */
  --surface-sunken:  #f3f2ee;   /* component chrome: table heads, pills, chips */

  /* Ink */
  --ink:             #0b0b0b;
  --ink-2:           #52514e;
  --ink-muted:       #6e6c66;   /* 4.5:1 on the band; --context keeps #898781 for bars */

  /* Hairlines */
  --rule:            rgba(11, 11, 11, 0.10);
  --rule-strong:     rgba(11, 11, 11, 0.18);
  --grid:            #e1e0d9;

  /* Data colours, checked to stay distinct under colour-vision deficiency */
  --ours:            #eb6834;  /* StreamMAE, marks, fills, large display numbers */
  --ours-text:       #b03800;  /* the same hue stepped for small text: 5.3:1 on the band */
  --ours-deep:       #c44b15;  /* ordinal step: larger encoder */
  --ours-wash:       #fdf0ea;
  --ref:             #2a78d6;  /* standard i.i.d. reference */
  --ref-wash:        #eaf2fd;
  --context:         #898781;  /* streaming baselines */
  --context-track:   #eceae4;

  --radius:          10px;
  --radius-sm:       6px;
  --measure:         68ch;

  --info: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24'%3E%3Cpath d='M12 2a10 10 0 1 0 0 20 10 10 0 0 0 0-20m0 1.8a8.2 8.2 0 1 1 0 16.4 8.2 8.2 0 0 1 0-16.4M11 10.6h2v7h-2zm0-4h2v2.2h-2z'/%3E%3C/svg%3E");

  --font: 'Inter', system-ui, -apple-system, 'Segoe UI', sans-serif;
  --mono: ui-monospace, 'SF Mono', 'Cascadia Code', 'Roboto Mono', monospace;
}

*, *::before, *::after { box-sizing: border-box; }

/* Inline SVG icon sprite: defined once, referenced with <use>. */
.sprite { position: absolute; width: 0; height: 0; overflow: hidden; }

.ico {
  width: 1em;
  height: 1em;
  flex: none;
  vertical-align: -0.125em;
}
.ico-lg { width: 1.15em; height: 1.15em; }

html {
  scroll-behavior: smooth;
  scroll-padding-top: 5rem;
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  font-family: var(--font);
  font-size: 17px;
  line-height: 1.65;
  color: var(--ink);
  background: var(--page);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
}

/* --------------------------------------------------------------- layout -- */

.wrap {
  width: min(100% - 3rem, 68rem);
  margin-inline: auto;
}

.wrap-narrow {
  width: min(100% - 3rem, 48rem);
  margin-inline: auto;
}

section { padding-block: 4.5rem; }

/* Sections alternate page / band so the eye can tell them apart while
   scrolling. The step is ~1.1:1, enough to read as a change, not a stripe. */
section.tinted {
  background: var(--band);
  border-block: 1px solid var(--rule);
}

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--ink);
  color: #fff;
  padding: 0.75rem 1.25rem;
  border-radius: 0 0 var(--radius-sm) 0;
  z-index: 200;
}
.skip-link:focus { left: 0; }

/* ------------------------------------------------------------------ nav -- */

.topnav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(249, 249, 247, 0.88);
  backdrop-filter: saturate(180%) blur(12px);
  -webkit-backdrop-filter: saturate(180%) blur(12px);
  border-bottom: 1px solid transparent;
  transition: border-color 0.2s ease;
}

.topnav.is-stuck { border-bottom-color: var(--rule); }

.topnav-inner {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  height: 3.5rem;
}

.topnav-brand {
  font-weight: 700;
  font-size: 0.95rem;
  letter-spacing: -0.01em;
  color: var(--ink);
  text-decoration: none;
  flex: none;
}
.topnav-brand .dot {
  display: inline-block;
  width: 7px; height: 7px;
  border-radius: 50%;
  background: var(--ours);
  margin-right: 0.5rem;
  vertical-align: 1px;
}

.topnav-links {
  display: flex;
  gap: 0.25rem;
  margin: 0;
  padding: 0;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: none;
}
.topnav-links::-webkit-scrollbar { display: none; }

.topnav-links a {
  display: block;
  padding: 0.4rem 0.7rem;
  font-size: 0.88rem;
  font-weight: 500;
  color: var(--ink-2);
  text-decoration: none;
  border-radius: var(--radius-sm);
  white-space: nowrap;
  transition: color 0.15s ease, background 0.15s ease;
}
.topnav-links a:hover { color: var(--ink); background: rgba(11, 11, 11, 0.04); }
.topnav-links a.is-active { color: var(--ours-text); font-weight: 600; }

/* ---------------------------------------------------------------- hero --- */

.hero {
  padding-block: 4rem 2.5rem;
  text-align: center;
}

.hero h1 {
  font-size: clamp(1.9rem, 4.2vw, 3rem);
  font-weight: 750;
  line-height: 1.12;
  letter-spacing: -0.022em;
  margin: 0 0 1rem;
  text-wrap: balance;
}
/* the venue sits between the title and the authors as a small tinted label */
.venue {
  display: inline-block;
  margin: 0 0 1.4rem;
  padding: 0.3rem 0.9rem;
  font-size: 0.95rem;
  font-weight: 650;
  letter-spacing: 0.03em;
  color: var(--ours-text);
  background: var(--ours-wash);
  border: 1px solid #f6d3c2;
  border-radius: 100px;
}

.authors {
  font-size: 1.05rem;
  font-weight: 500;
  margin: 0 0 0.6rem;
  color: var(--ink);
}
.authors a { white-space: nowrap; color: inherit; text-decoration: none; border-bottom: 1px solid var(--rule-strong); }
.authors a:hover,
.authors a:focus-visible { color: var(--ours-text); border-bottom-color: var(--ours-text); }
.authors sup { font-weight: 600; color: var(--ink-muted); }

.affiliations {
  font-size: 0.95rem;
  color: var(--ink-2);
  margin: 0 0 2rem;
  line-height: 1.6;
}
.affiliations sup { font-weight: 600; }

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

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  padding: 0.6rem 1.1rem;
  font-family: inherit;
  font-size: 0.92rem;
  font-weight: 600;
  color: var(--ink);
  background: var(--surface);
  border: 2px solid var(--ours-deep);
  border-radius: 8px;
  text-decoration: none;
  cursor: pointer;
  transition: background 0.15s ease, border-color 0.15s ease, color 0.15s ease;
}
.btn .ico { color: var(--ours-deep); }
.btn:hover { background: var(--ours-wash); border-color: var(--ours-text); }

.btn[disabled], .btn.is-pending {
  background: transparent;
  color: var(--ink-muted);
  border-color: var(--rule-strong);
  border-style: dashed;
  border-width: 1px;
  padding: calc(0.6rem + 1px) calc(1.1rem + 1px);   /* thinner border, same outer size */
  cursor: default;
}
.btn[disabled]:hover, .btn.is-pending:hover { background: transparent; border-color: var(--rule-strong); }
.btn[disabled] .ico, .btn.is-pending .ico { color: inherit; }


/* -------------------------------------------------------------- figures -- */

figure {
  margin: 0;
}

.fig img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: var(--radius);
  background: var(--surface);
}

.fig-zoom {
  display: block;
  width: 100%;
  padding: 0;
  border: 1px solid var(--rule);
  border-radius: var(--radius);
  background: var(--surface);
  cursor: zoom-in;
  overflow: hidden;
  position: relative;
}
.fig-zoom img { border-radius: 0; }
.fig-zoom:hover { border-color: var(--rule-strong); }

.fig-zoom::after {
  content: "";
  background: rgba(252, 252, 251, 0.92) center / 0.95rem no-repeat
    url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%2352514e' stroke-width='2' stroke-linecap='round'%3E%3Ccircle cx='10.5' cy='10.5' r='6.5'/%3E%3Cpath d='M15.5 15.5 21 21M10.5 7.5v6M7.5 10.5h6'/%3E%3C/svg%3E");
  position: absolute;
  right: 0.6rem;
  bottom: 0.6rem;
  width: 1.9rem;
  height: 1.9rem;
  display: grid;
  place-items: center;
  border: 1px solid var(--rule);
  border-radius: var(--radius-sm);
  opacity: 0;
  transition: opacity 0.15s ease;
}
.fig-zoom:hover::after, .fig-zoom:focus-visible::after { opacity: 1; }

/* Captions are left-aligned and share one measure with the body copy. Centred
   captions leave a short, floating second line whenever they wrap. */
figcaption {
  margin-top: 0.85rem;
  font-size: 0.92rem;
  line-height: 1.6;
  color: var(--ink-2);
  text-wrap: pretty;
}
figcaption b, figcaption strong { color: var(--ink); font-weight: 600; }

/* The teaser caption. Not flex: a flex gap lands between the bold opening and
   the comma that follows it, which shows up as a stray space. */
.fig-lead {
  font-size: 1rem;
}
.scroll-cue {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  margin-left: 0.9rem;
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--ours-text);
  text-decoration: none;
  white-space: nowrap;
}
.scroll-cue span {
  transition: transform 0.18s ease;
}
.scroll-cue:hover span { transform: translateX(3px); }

/* the sentence that says what the gradient numbers mean, before they appear */
.finding-intro {
  margin: 0 0 1.25rem;
  font-size: 0.95rem;
  line-height: 1.6;
  color: var(--ink-2);
  text-wrap: pretty;
}
.finding-intro strong { color: var(--ink); font-weight: 650; }

/* Lightbox */
.lightbox {
  position: fixed;
  inset: 0;
  z-index: 300;
  display: none;
  place-items: center;
  padding: 2rem;
  background: rgba(11, 11, 11, 0.86);
  cursor: zoom-out;
}
.lightbox.is-open { display: grid; }
.lightbox img {
  max-width: 100%;
  max-height: 86vh;
  border-radius: var(--radius-sm);
  background: #fff;
}
.lightbox-caption {
  color: #e6e5e0;
  font-size: 0.9rem;
  margin-top: 1rem;
  max-width: var(--measure);
  margin-inline: auto;
  text-wrap: pretty;
}
.lightbox-close {
  position: absolute;
  top: 1.25rem;
  right: 1.5rem;
  width: 2.5rem;
  height: 2.5rem;
  display: grid;
  place-items: center;
  font-size: 1.1rem;
  color: #fff;
  background: rgba(255, 255, 255, 0.12);
  border: none;
  border-radius: 50%;
  cursor: pointer;
}
.lightbox-close:hover { background: rgba(255, 255, 255, 0.22); }

/* --------------------------------------------------------------- prose --- */

h2.section-title {
  font-size: clamp(1.45rem, 2.6vw, 1.9rem);
  font-weight: 700;
  letter-spacing: -0.018em;
  margin: 0 0 0.5rem;
  text-wrap: balance;
}

/* Wider than body copy: a one-sentence lede capped at the reading measure
   stops around 60% of a wide section and reads as a broken line. */
.section-lede {
  font-size: 1.05rem;
  color: var(--ink-2);
  margin: 0 0 2.5rem;
  max-width: 82ch;
  text-wrap: pretty;
}

.section-head { margin-bottom: 2.5rem; }
.section-head .section-lede { margin-bottom: 0; }

h3.sub-title {
  font-size: 1.12rem;
  font-weight: 650;
  letter-spacing: -0.01em;
  margin: 0 0 0.35rem;
}

.prose p {
  max-width: var(--measure);
  margin: 0 0 1.15rem;
  color: var(--ink-2);
  text-wrap: pretty;
}
.prose p:last-child { margin-bottom: 0; }
.prose strong { color: var(--ink); font-weight: 600; }
.prose .lead { font-size: 1.08rem; color: var(--ink); }

.mono-tag {
  font-family: var(--mono);
  font-size: 0.88em;
  background: var(--surface-sunken);
  border: 1px solid var(--rule);
  border-radius: 4px;
  padding: 0.08em 0.36em;
  white-space: nowrap;
}
.tinted .mono-tag { background: var(--surface); }

/* ---------------------------------------------------------------- card --- */

.card {
  background: var(--surface);
  border: 1px solid var(--rule);
  border-radius: var(--radius);
  padding: 1.6rem;
}

.card + .card { margin-top: 1.5rem; }

.card-head {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  justify-content: space-between;
  gap: 1rem 1.5rem;
  margin-bottom: 1.25rem;
}
.card-head .titles { min-width: 0; }
.card-head.is-tight { margin-bottom: 0.5rem; }

/* a lead sentence that gets the full card width, clear of the controls row */
.card-intro {
  margin: 0 0 1.5rem;
  font-size: 0.95rem;
  line-height: 1.6;
  color: var(--ink-2);
  text-wrap: pretty;
}
.card-intro strong { color: var(--ink); font-weight: 650; }
/* the two experiment plans sit under the intro as a short list */
.xp-plan { margin-top: -0.4rem; padding-left: 1.2rem; }
.xp-plan li + li { margin-top: 0.35rem; }

/* one-line gloss under a card title */
.card-sub {
  margin: 0 0 1rem;
  font-size: 0.85rem;
  color: var(--ink-muted);
}
.card-head p {
  margin: 0;
  font-size: 0.92rem;
  color: var(--ink-2);
  max-width: 64ch;
  text-wrap: pretty;
}

/* ------------------------------------------------------------- controls -- */

.controls {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 1.4rem;
}

.segmented {
  display: inline-flex;
  flex-wrap: wrap;              /* five pills must not force a phone to scroll */
  max-width: 100%;
  padding: 3px;
  gap: 2px;
  background: var(--surface-sunken);
  border: 1px solid var(--rule);
  border-radius: 100px;
}
.tinted .segmented { background: var(--surface); }

.segmented button {
  appearance: none;
  border: none;
  background: transparent;
  font-family: inherit;
  font-size: 0.85rem;
  font-weight: 550;
  color: var(--ink-2);
  padding: 0.35rem 0.85rem;
  border-radius: 100px;
  cursor: pointer;
  white-space: nowrap;
  transition: background 0.15s ease, color 0.15s ease;
}
.segmented button:hover { color: var(--ink); }
.segmented button.is-on {
  background: var(--ink);
  color: #fff;
  font-weight: 600;
}

.ghost-toggle {
  appearance: none;
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-family: inherit;
  font-size: 0.85rem;
  font-weight: 550;
  color: var(--ink-2);
  background: transparent;
  border: 1px solid var(--rule);
  border-radius: 100px;
  padding: 0.4rem 0.85rem;
  cursor: pointer;
  transition: border-color 0.15s ease, color 0.15s ease;
}
.ghost-toggle:hover { color: var(--ink); border-color: var(--rule-strong); }
.ghost-toggle.is-on { color: var(--ink); border-color: var(--ink); }

.metric-note {
  font-size: 0.82rem;
  color: var(--ink-muted);
  margin-left: auto;
}

/* --------------------------------------------------------------- charts -- */

.chart { position: relative; }

.chart-rows {
  display: grid;
  gap: 2px;                       /* the 2px surface gap between adjacent bars */
}

.row {
  display: grid;
  grid-template-columns: minmax(6.5rem, 13rem) 1fr;
  align-items: center;
  gap: 0.9rem;
  padding: 3px 0;
  border-radius: var(--radius-sm);
  cursor: default;
}
.row:hover, .row:focus-visible {
  background: rgba(11, 11, 11, 0.028);
  outline: none;
}
.row:focus-visible { box-shadow: 0 0 0 2px var(--ours); }

.row .name {
  font-size: 0.88rem;
  color: var(--ink-2);
  text-align: right;
  line-height: 1.35;
  overflow-wrap: break-word;
}
.row.is-ours .name { color: var(--ink); font-weight: 650; }
.row.is-ref .name { color: var(--ink-2); }
.row .name .qual {
  display: block;
  font-size: 0.76rem;
  color: var(--ink-muted);
  font-weight: 400;
}

/* A bar track reserves a right-hand gutter so the tip label never clips.
   The bar and its label are both positioned as a % of .bar-wrap, so they
   share one scale and animate together when the metric changes. */
.bar-track {
  position: relative;
  height: 22px;
}

.bar-wrap {
  position: absolute;
  top: 0;
  bottom: 0;
  left: 0;
  right: var(--gutter, 3.2rem);
}

.bar {
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 0;
  border-radius: 0 4px 4px 0;     /* 4px rounded data-end, square at baseline */
  background: var(--context);
  transition: width 0.5s cubic-bezier(0.22, 0.61, 0.36, 1);
}
.row.is-ours .bar { background: var(--ours); }
.row.is-ref  .bar { background: var(--ref); }

.row:hover .bar, .row:focus-visible .bar { filter: brightness(1.06); }

.bar-value {
  position: absolute;
  top: 50%;
  left: 0;
  transform: translateY(-50%);
  margin-left: 0.5rem;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--ink);
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
  transition: left 0.5s cubic-bezier(0.22, 0.61, 0.36, 1);
}
.row.is-ours .bar-value { font-weight: 700; }

/* Reference rule, marks the i.i.d. baseline across the whole plot. */
.chart-plot { position: relative; }

.ref-rule {
  position: absolute;
  top: 0;
  bottom: 0;
  width: 0;
  border-left: 1px dashed var(--ref);
  pointer-events: none;
}
.ref-rule.flip .ref-rule-label { left: auto; right: 0.4rem; }

.ref-rule-label {
  position: absolute;
  top: -0.15rem;
  left: 0.4rem;
  transition: none;
  font-size: 0.7rem;
  font-weight: 600;
  color: var(--ref);
  white-space: nowrap;
  background: var(--surface);
  padding: 0 0.3rem;
}

/* ---------------------------------------------- sliding-window animation -- */

.swin {
  border: 1px solid var(--rule);
  border-radius: var(--radius);
  background: var(--surface);
  padding: 1.1rem 1.2rem 1.2rem;
}

.swin-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem 1.25rem;
  margin-bottom: 1.25rem;
}

.swin-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-family: inherit;
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--ink-2);
  background: transparent;
  border: 1px solid var(--rule);
  border-radius: 100px;
  padding: 0.35rem 0.8rem;
  cursor: pointer;
  transition: border-color 0.15s ease, color 0.15s ease;
}
.swin-btn:hover { color: var(--ink); border-color: var(--rule-strong); }
.swin-btn .ico { width: 0.82em; height: 0.82em; }

.swin-sliders {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem 1.25rem;
  margin-left: auto;
}
.swin-slider {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.8rem;
  color: var(--ink-2);
  white-space: nowrap;
}
.swin-slider > span em { font-style: italic; font-weight: 600; color: var(--ink); }
.swin-slider output {
  min-width: 1.1rem;
  font-weight: 700;
  color: var(--ours-text);
  font-variant-numeric: tabular-nums;
}

.swin-slider input[type="range"] {
  -webkit-appearance: none;
  appearance: none;
  width: 5.5rem;
  height: 18px;
  background: transparent;
  cursor: pointer;
  margin: 0;
}
.swin-slider input[type="range"]::-webkit-slider-runnable-track {
  height: 3px;
  background: var(--context-track);
  border-radius: 2px;
}
.swin-slider input[type="range"]::-moz-range-track {
  height: 3px;
  background: var(--context-track);
  border-radius: 2px;
}
.swin-slider input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 13px;
  height: 13px;
  margin-top: -5px;
  border-radius: 50%;
  background: var(--ours);
  border: 2px solid var(--surface);
  box-shadow: 0 0 0 1px var(--rule-strong);
}
.swin-slider input[type="range"]::-moz-range-thumb {
  width: 13px;
  height: 13px;
  border-radius: 50%;
  background: var(--ours);
  border: 2px solid var(--surface);
  box-shadow: 0 0 0 1px var(--rule-strong);
}

/* The film strip: a clipping viewport with a wider track sliding inside it.
   Cells show real WT++London frames from a sprite sheet, with the frame
   index labelled underneath. */
.swin-stage {
  position: relative;
  padding-top: 1.85rem;         /* room for the batch tag above the strip */
}

/* Warm charcoal film stock rather than black: the frame numbers sit on it, and
   on black they were barely legible. Every mark below is measured against it , 
   labels 5.3:1+, the batch ring 4.1:1, the window border 12.6:1. */
.swin-viewport {
  --tape: #33312d;
  overflow: hidden;
  background: var(--tape);
  border-radius: var(--radius-sm);
  padding: 6px;
  /* the perforated edges of a film strip */
  border-top: 8px dashed var(--surface);
  border-bottom: 8px dashed var(--surface);
  outline: 1px solid var(--rule);
}

.swin-track {
  position: relative;
  transition: transform 0.85s cubic-bezier(0.4, 0.05, 0.2, 1);
  will-change: transform;
}
.swin-track.no-anim { transition: none; }

.swin-cell {
  position: absolute;
  top: 0;
}

/* A dim overlay rather than a CSS filter: filters would take the track off
   the compositor fast path while it slides. */
.swin-thumb {
  position: relative;
  border-radius: 2px;
  background-repeat: no-repeat;
  background-color: #4a4741;
  box-shadow: inset 0 0 0 0 transparent;
  transition: box-shadow 0.45s ease;
}
.swin-thumb::after {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: 2px;
  background: #1a1916;
  opacity: 0.6;                       /* outside the batch */
  transition: opacity 0.45s ease;
}

.swin-cell-label {
  display: block;
  text-align: center;
  font-size: 0.7rem;
  line-height: 19px;
  color: #a8a69e;                     /* 5.3:1 on the tape */
  font-variant-numeric: tabular-nums;
  transition: color 0.45s ease;
}
.swin-x { opacity: 0.6; margin-right: 0.5px; }
.swin-cell-label sub {
  font-size: 0.76em;
  line-height: 0;
  vertical-align: -0.22em;
  font-variant-numeric: tabular-nums;
}

.swin-cell.is-past .swin-thumb::after { opacity: 0.72; }

/* The whole batch shares one ring colour, the dimming, not a second hue,
   separates repeated frames from new ones. */
.swin-cell.is-in .swin-thumb {
  box-shadow: inset 0 0 0 2.5px var(--ours);
}
.swin-cell.is-in .swin-thumb::after { opacity: 0; }
.swin-cell.is-in .swin-cell-label { color: #ffb591; font-weight: 700; }

/* Repeated: same batch, but the model already saw it last step. */
.swin-cell.is-repeated .swin-thumb::after { opacity: 0.34; }
.swin-cell.is-repeated .swin-cell-label { color: #d79b78; font-weight: 600; }

/* The window rides inside the track, so it travels with its own frames. */
.swin-window {
  position: absolute;
  left: 0;
  top: -3px;
  width: 0;
  height: 0;
  z-index: 2;
  border: 2px solid var(--surface);
  border-radius: 5px;
  box-shadow: 0 0 0 1px rgba(11, 11, 11, 0.35);
  pointer-events: none;
  transition: transform 0.85s cubic-bezier(0.4, 0.05, 0.2, 1),
              width 0.35s ease;
}
.swin-window.no-anim { transition: none; }

.swin-window-tag {
  position: absolute;
  bottom: calc(100% + 12px);
  left: 0;
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--ink);
  white-space: nowrap;
  font-variant-numeric: tabular-nums;
}
.swin-window-tag::before { content: "batch "; color: var(--ink-muted); }

.swin-foot {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 0.5rem 1.5rem;
  margin-top: 1rem;
  padding-top: 0.9rem;
  border-top: 1px solid var(--rule);
}
.swin-legend { font-size: 0.78rem; gap: 0.85rem; }
.swin-legend .key { width: 10px; height: 10px; }

.swin-readout {
  margin: 0;
  font-size: 0.84rem;
  line-height: 1.55;
  color: var(--ink-2);
}
.swin-ro-strong { font-weight: 650; color: var(--ink); }

@media (max-width: 760px) {
  .swin { padding: 0.9rem; }
  .swin-sliders { margin-left: 0; width: 100%; }
  .swin-slider input[type="range"] { width: 4.5rem; }
  .swin-cell { height: 32px; font-size: 0.66rem; }
}

@media (prefers-reduced-motion: reduce) {
  .swin-window, .swin-cell, .swin-track { transition: none !important; }
}

/* Definitions of intra / inter-batch similarity, a small diagram each. */
.defs {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(19rem, 1fr));
  gap: 1.5rem 2.5rem;
}
.def {
  display: flex;
  gap: 1rem;
  align-items: flex-start;
}
.def-art { width: 108px; height: auto; flex: none; margin-top: 0.15rem; }
.def-title {
  font-size: 0.98rem;
  font-weight: 650;
  margin: 0 0 0.25rem;
}
.def-title em { font-style: italic; color: var(--ours-text); }
.def p {
  margin: 0;
  font-size: 0.9rem;
  line-height: 1.55;
  color: var(--ink-2);
}

/* Inline hint: detail on hover or focus, out of the way otherwise. */
/* An info mark, not a question mark: a "?" after a heading made the heading
   itself read as a question. Drawn from a mask, so it has no text. */
/* An info mark, not a question mark: a "?" after a heading made the heading
   itself read as a question. The glyph lives on ::before, because a mask on
   .hint itself would clip the ::after tooltip. */
.hint {
  display: inline-block;
  width: 0.92em;
  height: 0.92em;
  margin-left: 0.25em;
  vertical-align: -0.08em;
  cursor: help;
  position: relative;
}
.hint::before {
  content: "";
  position: absolute;
  inset: 0;
  background: var(--ink-muted);
  -webkit-mask: var(--info) center / contain no-repeat;
  mask: var(--info) center / contain no-repeat;
  transition: background 0.15s ease;
}
.hint:hover::before, .hint:focus-visible::before { background: var(--ink); }

/* display:none rather than visibility:hidden, a hidden-but-laid-out tooltip
   still counts toward the page's scroll width and caused a horizontal
   overflow on narrow screens. */
/* the mask clips ::after, so the tooltip hangs off a wrapper-free anchor */
.hint::after {
  content: attr(data-hint);
  display: none;
  position: absolute;
  bottom: calc(100% + 0.5rem);
  left: 50%;
  transform: translateX(-50%);
  width: max-content;
  max-width: min(17rem, 70vw);
  padding: 0.55rem 0.7rem;
  font-size: 0.78rem;
  font-weight: 400;
  line-height: 1.5;
  text-align: left;
  color: var(--ink-2);
  background: var(--surface);
  border: 1px solid var(--rule-strong);
  border-radius: var(--radius-sm);
  box-shadow: 0 6px 18px rgba(11, 11, 11, 0.12);
  z-index: 30;
  pointer-events: none;
}
.hint:hover::after, .hint:focus-visible::after {
  display: block;
  animation: hintIn 0.14s ease both;
}
@keyframes hintIn { from { opacity: 0 } to { opacity: 1 } }

/* Method components. */
/* Group heading sits directly above the block it names, centred, with a rule
   running out to each side. */
.group { margin-block: 0; }
.group-title {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin: 0 0 1rem;
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.11em;
  text-transform: uppercase;
  color: var(--ours-text);
  text-align: center;
}
.group-title::before,
.group-title::after {
  content: "";
  flex: 1;
  height: 1px;
  background: var(--rule);
}

.components {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(16rem, 1fr));
  gap: 1.25rem;
}
.components-2 { grid-template-columns: repeat(auto-fit, minmax(19rem, 1fr)); }

.component {
  background: var(--surface);
  border: 1px solid var(--rule);
  border-radius: var(--radius);
  padding: 1.25rem;
}
.comp-art {
  width: 100%;
  height: auto;
  display: block;
  margin-bottom: 1rem;
}
.component h4 {
  font-size: 0.98rem;
  font-weight: 650;
  margin: 0 0 0.3rem;
}
.component p {
  margin: 0;
  font-size: 0.88rem;
  line-height: 1.55;
  color: var(--ink-2);
}
.art-label {
  font-family: var(--font);
  font-size: 8.5px;
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  fill: var(--ink-muted);
}
.art-label-strong { fill: var(--ours); }



/* The control: two before/after experiments, no controls to operate. */
.xp {
  background: var(--surface);
  border: 1px solid var(--rule);
  border-radius: var(--radius);
  padding: 1.4rem 1.5rem;
}
.xp + .xp { margin-top: 1.25rem; }

.xp-head { margin-bottom: 1.25rem; }
.xp-n {
  display: block;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.11em;
  text-transform: uppercase;
  color: var(--ours-text);
  margin-bottom: 0.35rem;
}
.xp-head h4 {
  font-size: 1.12rem;
  font-weight: 700;
  margin: 0 0 0.3rem;
}
.xp-head p {
  margin: 0;
  font-size: 0.92rem;
  line-height: 1.55;
  color: var(--ink-2);
  max-width: var(--measure);
}

.xp-grid { display: grid; gap: 2px; }

.xp-line {
  display: grid;
  grid-template-columns: minmax(8rem, 13rem) 1fr auto 1fr 5.5rem;
  align-items: center;
  gap: 0.75rem;
  padding: 0.5rem 0.75rem;
  border-radius: var(--radius-sm);
}
/* with a reference column: it sits outside the before/after chain */
.xp-grid.has-ref .xp-line {
  grid-template-columns: minmax(7rem, 11rem) minmax(4.5rem, 0.85fr) 1fr auto 1fr 5.5rem;
}
.xp-ref {
  font-size: 0.95rem;
  font-variant-numeric: tabular-nums;
  text-align: center;
  color: var(--ink-muted);
  padding-right: 0.75rem;
  border-right: 1px solid var(--rule);
}
.xp-line.is-cols .xp-ref {
  font-size: 0.78rem;
  font-weight: 600;
  border-right: none;
}
.xp-ref-k { display: none; }

.xp-label { font-size: 0.88rem; color: var(--ink-2); }
.xp-a, .xp-b {
  font-size: 1rem;
  font-variant-numeric: tabular-nums;
  text-align: center;
}
.xp-arrow { color: var(--ink-muted); font-size: 0.95rem; }
.xp-tag {
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink-muted);
  text-align: right;
}

/* column headings */
.xp-line.is-cols { padding-block: 0 0.35rem; }
.xp-line.is-cols .xp-a,
.xp-line.is-cols .xp-b {
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--ink-muted);
  text-align: center;
}

/* the variable that was deliberately held constant */
.xp-line.is-held .xp-a,
.xp-line.is-held .xp-b { color: var(--ink-muted); }

/* the variable under test */
.xp-line.is-changed {
  background: var(--ours-wash);
  box-shadow: inset 2px 0 0 var(--ours);
}
.xp-line.is-changed .xp-label { color: var(--ink); font-weight: 650; }
.xp-line.is-changed .xp-a,
.xp-line.is-changed .xp-b { font-weight: 700; color: var(--ink); }
.xp-line.is-changed .xp-arrow { color: var(--ours-text); }
.xp-line.is-changed .xp-tag { color: var(--ours-text); }

/* outcomes: one row per benchmark, each with its own delta */
.xp-line.is-first-result {
  margin-top: 0.35rem;
  padding-top: 0.85rem;
  border-top: 1px solid var(--rule);
  border-radius: 0;
}
.xp-line.is-result .xp-label { color: var(--ink); font-weight: 650; }
.xp-line.is-result .xp-a,
.xp-line.is-result .xp-b { font-size: 1.1rem; font-weight: 700; }
.xp-line.is-result .xp-ref { font-size: 1rem; }

.xp-tag.is-delta {
  font-size: 0.95rem;
  font-weight: 700;
  letter-spacing: 0;
  text-transform: none;
  font-variant-numeric: tabular-nums;
}
.xp-tag.is-delta.is-flat { color: var(--ref); }
.xp-tag.is-delta.is-bad  { color: #c0392b; }

.xp-out {
  margin-top: 0.9rem;
  padding: 0.7rem 0.9rem;
  border-radius: var(--radius-sm);
}
.xp-out-lbl {
  font-size: 0.95rem;
  font-weight: 700;
  letter-spacing: 0.01em;
}
.xp-out.is-flat { background: var(--ref-wash); }
.xp-out.is-flat .xp-out-lbl { color: var(--ref); }
.xp-out.is-bad { background: #fbeceb; }
.xp-out.is-bad .xp-out-lbl { color: #c0392b; }

/* WT++ stream construction bars. */
.streams { display: grid; gap: 1.1rem; }
.stream-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 0.75rem;
  margin-bottom: 0.3rem;
}
.stream-name {
  font-family: var(--mono);
  font-size: 0.84rem;
  font-weight: 600;
  color: var(--ink);
}
.stream-meta { font-size: 0.78rem; color: var(--ink-muted); }
.stream-track {
  position: relative;
  height: 14px;
}
/* The lane stops short of the right edge so the hours label always fits. */
.stream-lane {
  position: absolute;
  top: 0;
  bottom: 0;
  left: 0;
  right: 3.4rem;
}
.stream-fill {
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  background: var(--context);
  border-radius: 0 3px 3px 0;
}
.stream-row.is-default .stream-fill { background: var(--ours); }
.stream-row:last-child .stream-fill { background: var(--ours-deep); }
.stream-hours {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  margin-left: 0.45rem;
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--ink);
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}
.stream-note {
  margin: 0.3rem 0 0;
  font-size: 0.8rem;
  color: var(--ink-muted);
}

/* City clips. Ten tiles, five across, all the same size. Mostar and Dubrovnik
   lead the order. */
.cities { margin-top: 3rem; }
.cities-head { margin-bottom: 1.25rem; }
.cities-head .sub-title { margin-bottom: 0.2rem; }
.cities-head p {
  margin: 0;
  font-size: 0.9rem;
  color: var(--ink-muted);
}

.city-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 10px;
}
.city {
  position: relative;
  margin: 0;
  border-radius: var(--radius-sm);
  overflow: hidden;
  background: #2a2927;
  outline: 1px solid var(--rule);
  outline-offset: -1px;
}

.city-vid {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  background: #2a2927;
}

.city figcaption {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  margin: 0;
  padding: 1.3rem 0.55rem 0.4rem;
  font-size: 0.76rem;
  font-weight: 650;
  color: #fff;
  text-align: left;
  background: linear-gradient(to top, rgba(11, 11, 11, 0.75), rgba(11, 11, 11, 0));
  pointer-events: none;
}

/* A budget/protocol caveat under a chart. */
.caveat {
  margin: 1.25rem auto 0;
  text-wrap: pretty;
  padding-top: 1rem;
  border-top: 1px solid var(--rule);
  font-size: 0.84rem;
  line-height: 1.6;
  color: var(--ink-muted);
  max-width: var(--measure);
}
.caveat strong { color: var(--ink-2); font-weight: 650; }

/* Domain generalization, small multiples. */
.domain-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(17rem, 1fr));
  gap: 1.75rem;
}
.domain-head { margin-bottom: 0.9rem; }
.domain-head h4 {
  font-size: 0.95rem;
  font-weight: 700;
  margin: 0;
}
.domain-head p {
  margin: 0.1rem 0 0;
  font-size: 0.8rem;
  color: var(--ink-muted);
}
.domain-meta { font-size: 0.78rem; }
.domain-meta strong { color: var(--ours-text); font-weight: 700; }
.domain-panel .row { grid-template-columns: 1fr; gap: 0.15rem; }
.domain-panel .row .name { text-align: left; font-size: 0.82rem; }
.domain-panel .bar-track { --gutter: 2.8rem; height: 18px; }

.chart-foot {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 1rem;
  margin-top: 1.25rem;
  padding-top: 1rem;
  border-top: 1px solid var(--rule);
}

.legend {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  font-size: 0.83rem;
  color: var(--ink-2);
  margin: 0;
  padding: 0;
  list-style: none;
}
.legend li { display: inline-flex; align-items: center; gap: 0.45rem; }
.legend .key {
  width: 12px; height: 12px;
  border-radius: 3px;
  flex: none;
}
.legend .key.line {
  width: 16px; height: 3px;
  border-radius: 2px;
}
.legend .key.ours { background: var(--ours); }
.legend .key.ours-deep { background: var(--ours-deep); }
.legend .key.ref { background: var(--ref); }
.legend .key.context { background: var(--context); }

.group-label {
  font-size: 0.74rem;
  font-weight: 700;
  letter-spacing: 0.09em;
  text-transform: uppercase;
  color: var(--ink-muted);
  padding: 0.9rem 0 0.35rem;
  grid-column: 1 / -1;
}
.group-label:first-child { padding-top: 0; }

/* SVG line chart */
.linechart { width: 100%; height: auto; display: block; overflow: visible; }
.linechart .grid-line { stroke: var(--grid); stroke-width: 1; }
.linechart .axis-line { stroke: #c3c2b7; stroke-width: 1; }
.linechart .tick { fill: var(--ink-muted); font-size: 12px; font-variant-numeric: tabular-nums; }
.linechart .axis-title { fill: var(--ink-2); font-size: 12px; font-weight: 600; }
.linechart .series-line { fill: none; stroke-width: 2; stroke-linejoin: round; stroke-linecap: round; }
.linechart .series-dot { stroke: var(--surface); stroke-width: 2; }
.linechart .end-label { font-size: 12.5px; font-weight: 650; fill: var(--ink); font-variant-numeric: tabular-nums; }
.linechart .hit { fill: transparent; cursor: pointer; }
.linechart .crosshair { stroke: var(--rule-strong); stroke-width: 1; }

/* Tooltip */
.tooltip {
  position: absolute;
  z-index: 20;
  min-width: 9rem;
  padding: 0.6rem 0.7rem;
  background: var(--surface);
  border: 1px solid var(--rule-strong);
  border-radius: var(--radius-sm);
  box-shadow: 0 6px 18px rgba(11, 11, 11, 0.10);
  font-size: 0.84rem;
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.12s ease;
}
.tooltip.is-visible { opacity: 1; }
.tooltip .tt-title {
  font-size: 0.78rem;
  color: var(--ink-muted);
  margin-bottom: 0.35rem;
}
.tooltip .tt-row {
  display: flex;
  align-items: baseline;
  gap: 0.5rem;
  white-space: nowrap;
}
.tooltip .tt-row + .tt-row { margin-top: 0.2rem; }
.tooltip .tt-key {
  width: 14px; height: 3px;
  border-radius: 2px;
  flex: none;
  transform: translateY(-3px);
}
.tooltip .tt-val {
  font-weight: 700;
  color: var(--ink);
  font-variant-numeric: tabular-nums;
}
.tooltip .tt-name { color: var(--ink-2); }

/* ---------------------------------------------------------------- table -- */

.table-wrap {
  overflow-x: auto;
  border: 1px solid var(--rule);
  border-radius: var(--radius-sm);
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.88rem;
  font-variant-numeric: tabular-nums;
  background: var(--surface);
}

thead th {
  text-align: right;
  font-weight: 600;
  font-size: 0.78rem;
  letter-spacing: 0.02em;
  color: var(--ink-2);
  padding: 0.7rem 0.85rem;
  border-bottom: 1px solid var(--rule-strong);
  white-space: nowrap;
  background: var(--surface-sunken);
}
thead th:first-child { text-align: left; }

tbody td {
  text-align: right;
  padding: 0.55rem 0.85rem;
  border-bottom: 1px solid var(--rule);
  color: var(--ink-2);
  white-space: nowrap;
}
tbody td:first-child { text-align: left; color: var(--ink); white-space: normal; }
tbody tr:last-child td { border-bottom: none; }

tbody tr.is-ours td { background: var(--ours-wash); color: var(--ink); font-weight: 600; }
tbody tr.is-ref td { background: var(--ref-wash); }

tbody tr.group-row td {
  background: var(--surface-sunken);
  font-size: 0.74rem;
  font-weight: 700;
  letter-spacing: 0.09em;
  text-transform: uppercase;
  color: var(--ink-muted);
  text-align: left;
  padding: 0.45rem 0.85rem;
}

td .pm { color: var(--ink-muted); font-weight: 400; font-size: 0.85em; }
td .qual { color: var(--ink-muted); font-weight: 400; }

[hidden] { display: none !important; }

/* ------------------------------------------------------------- two-col --- */

.stack-xl > * + * { margin-top: 4rem; }

/* The question each block answers. */
.ask {
  font-size: clamp(1.05rem, 2vw, 1.28rem);
  font-weight: 650;
  letter-spacing: -0.012em;
  margin: 0 0 1.1rem;
  color: var(--ink);
  display: flex;
  align-items: baseline;
  gap: 0.6rem;
  text-wrap: balance;
}
/* The only orange mark that sits straight on a section band, so it uses the
   darker text step, 5.3:1 there instead of 2.8:1. */
.ask::before {
  content: "";
  flex: none;
  width: 4px;
  align-self: stretch;
  min-height: 1.1em;
  border-radius: 2px;
  background: var(--ours-text);
}

/* The one-line answer under a chart. */
/* Centred as a block, but the text inside stays left-aligned: centred copy
   leaves a short floating last line whenever it wraps. */
.takeaway {
  margin: 1.5rem auto 0;
  max-width: var(--measure);
  text-wrap: pretty;
  padding: 0.85rem 1rem;
  font-size: 0.94rem;
  line-height: 1.55;
  color: var(--ink);
  background: var(--ours-wash);
  border-left: 3px solid var(--ours);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
}
.takeaway strong { font-weight: 700; }

/* the conclusion of a takeaway, given its own centred line */
.takeaway .punch {
  display: block;
  margin-top: 0.6rem;
  padding-top: 0.6rem;
  border-top: 1px solid rgba(235, 104, 52, 0.25);
  text-align: center;
  font-weight: 700;
  color: var(--ours-text);
}
.takeaway em { font-style: italic; }

/* The gradient finding, framed as distance from the i.i.d. anchor: the claim
   is about distance, so the page should not leave the reader subtracting. */
.finding {
  display: grid;
  grid-template-columns: minmax(8rem, 11rem) 1fr;
  gap: 1px;
  background: var(--rule);
  border: 1px solid var(--rule);
  border-radius: var(--radius);
  overflow: hidden;
}
.finding-anchor {
  background: var(--ref-wash);
  padding: 1rem 1.1rem;
  display: flex;
  flex-direction: column;
  justify-content: center;
  text-align: center;
}
.finding-anchor .finding-raw {
  font-size: 1.6rem;
  font-weight: 700;
  letter-spacing: -0.025em;
  line-height: 1.1;
  color: var(--ref);
}
.finding-anchor .finding-lbl { color: var(--ref); font-weight: 600; }
.finding-tag {
  display: block;
  margin-top: 0.3rem;
  font-size: 0.66rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ref);
  opacity: 0.75;
}

.finding-scale {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--rule);
}
.finding-stat {
  background: var(--surface);
  padding: 1rem 0.9rem;
  text-align: center;
}
/* Each distance uses its curve's colour from the figure below, so the strip
   reads as that figure's legend: StreamMAE orange, streaming MAE (baseline)
   green, Orthogonal-AdamW red, i.i.d. MAE blue on the anchor. The greens and
   reds are the Google-palette steps the figure uses, darkened to the 600/800
   step so they clear 4:1 as large text. */
.finding-n {
  display: block;
  font-size: 1.6rem;
  font-weight: 700;
  letter-spacing: -0.025em;
  line-height: 1.1;
  color: var(--ours);
}
.finding-n::before { content: "\0394\2009"; font-size: 0.7em; opacity: 0.7; }
.finding-stat:nth-child(2) .finding-n { color: #1e8e3e; }
.finding-stat:nth-child(3) .finding-n { color: #a50e0e; }

.finding-lbl {
  display: block;
  margin-top: 0.2rem;
  font-size: 0.8rem;
  color: var(--ink-2);
}
.finding-stat .finding-raw {
  display: block;
  margin-top: 0.15rem;
  font-size: 0.75rem;
  color: var(--ink-muted);
  font-variant-numeric: tabular-nums;
}
.finding-cap {
  grid-column: 1 / -1;
  margin: 0;
  padding: 0.7rem 1.1rem;
  font-size: 0.82rem;
  color: var(--ink-muted);
  background: var(--surface-sunken);
}
.finding-cap strong { color: var(--ink-2); font-weight: 650; }

/* The two similarity headline numbers, inline under each definition. */
.def-nums {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 0.5rem;
  margin: 0.55rem 0 0 !important;
  font-size: 0.85rem;
  color: var(--ink-muted);
}
.def-nums b {
  font-weight: 700;
  color: var(--ink-2);
  font-variant-numeric: tabular-nums;
}
.def-nums .is-hi b { color: var(--ours-text); }
/* sits directly under the two definitions, explaining their numbers */
.def-src {
  margin: 1rem 0 0;
  font-size: 0.82rem;
  color: var(--ink-muted);
}
.def-vs {
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  opacity: 0.7;
}

/* WT++ facts beside the stream ladder. */
/* the facts and the stream ladder share a row; the clips run full width below */
.data-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
  align-items: start;
}
.data-note {
  margin: 1.1rem 0 0;
  font-size: 0.95rem;
  line-height: 1.6;
  color: var(--ink-2);
  max-width: var(--measure);
  text-wrap: pretty;
}
/* The three WT++ numbers are what this paragraph is for, so they take the
   accent the page uses for our own work. --ours-text is the small-text step
   of that hue, 5.8:1 here, where --ours itself would only reach 3.0:1. */
.data-note strong { color: var(--ours-text); }
.data-grid + .cities { margin-top: 3rem; }

/* --------------------------------------------------------------- method -- */

/* -------------------------------------------------------------- bibtex --- */

.bibtex-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 0.85rem;
}

pre {
  margin: 0;
  padding: 1.2rem;
  background: var(--surface);
  border: 1px solid var(--rule);
  border-radius: var(--radius-sm);
  overflow-x: auto;
  font-family: var(--mono);
  font-size: 0.82rem;
  line-height: 1.65;
  color: var(--ink-2);
  tab-size: 2;
}
pre code { font-family: inherit; }

.copy-btn.is-copied {
  color: #006300;
  border-color: #006300;
}

/* -------------------------------------------------------------- poster --- */


/* -------------------------------------------------------------- footer --- */

.footer {
  padding-block: 2.5rem;
  border-top: 1px solid var(--rule);
  background: var(--band);
}
.footer p {
  margin: 0;
  font-size: 0.85rem;
  line-height: 1.65;
  color: var(--ink-muted);
  max-width: var(--measure);
}
.footer a { color: var(--ink-2); text-decoration: underline; text-underline-offset: 2px; }
.footer a:hover { color: var(--ours-text); }

/* --------------------------------------------------------------- focus --- */

a:focus-visible,
button:focus-visible,
[tabindex]:focus-visible {
  outline: 2px solid var(--ours);
  outline-offset: 2px;
  border-radius: 3px;
}

/* -------------------------------------------------------------- mobile --- */

@media (max-width: 760px) {
  body { font-size: 16px; }
  section { padding-block: 3rem; }
  .wrap, .wrap-narrow { width: min(100% - 2rem, 68rem); }
  .hero { padding-block: 2.5rem 1.5rem; }
  .card { padding: 1.15rem; }
  .row {
    grid-template-columns: 1fr;
    gap: 0.2rem;
    padding: 0.35rem 0;
  }
  .row .name { text-align: left; }
  .chart-rows { gap: 0.25rem; }
  .topnav-links { gap: 0; }
  .topnav-inner { gap: 0.75rem; }
  .metric-note { margin-left: 0; width: 100%; }
  .lightbox { padding: 1rem; }

  .data-grid { grid-template-columns: 1fr; gap: 1.5rem; }
  .city-grid { grid-template-columns: repeat(2, 1fr); gap: 8px; }
  .city figcaption { font-size: 0.7rem; padding: 1rem 0.45rem 0.32rem; }
  /* label on its own line; before -> after stays one row so the arrow reads */
  .xp { padding: 1.1rem; }
  .xp-line,
  .xp-grid.has-ref .xp-line {
    grid-template-columns: 1fr auto 1fr;
    gap: 0.3rem 0.6rem;
    padding: 0.6rem 0.7rem;
  }
  .xp-label { grid-column: 1 / -1; font-size: 0.82rem; }
  .xp-tag { grid-column: 1 / -1; text-align: left; }
  .xp-ref {
    grid-column: 1 / -1;
    text-align: left;
    border-right: none;
    padding-right: 0;
    font-size: 0.82rem;
  }
  .xp-ref-k {
    display: inline;
    margin-right: 0.4rem;
    color: var(--ink-muted);
  }
  .xp-ref-k::after { content: ":"; }
  /* keep the regime names, without them the two numbers are unlabelled */
  .xp-line.is-cols { padding-block: 0 0.2rem; }
  .xp-line.is-cols .xp-label,
  .xp-line.is-cols .xp-tag,
  .xp-line.is-cols .xp-ref { display: none; }
  .xp-line.is-cols .xp-a,
  .xp-line.is-cols .xp-b { font-size: 0.72rem; line-height: 1.3; }
  .xp-line.is-changed .xp-tag { order: 9; }
  .stack-xl > * + * { margin-top: 2.75rem; }
  .takeaway { padding: 0.75rem 0.85rem; font-size: 0.9rem; }
  /* the anchor sits above the three distances, each on its own line */
  .finding { grid-template-columns: 1fr; }
  .finding-scale { grid-template-columns: 1fr; }
  .finding-anchor,
  .finding-stat {
    display: grid;
    grid-template-columns: auto 1fr auto;
    align-items: baseline;
    gap: 0.5rem;
    text-align: left;
    padding: 0.75rem 1rem;
  }
  .finding-anchor .finding-raw,
  .finding-n { font-size: 1.25rem; }
  .finding-lbl { margin-top: 0; }
  .finding-stat .finding-raw { margin-top: 0; text-align: right; }
  .finding-tag { margin-top: 0; }

  .finding-n { font-size: 1.35rem; }
  .segmented { border-radius: var(--radius); }
  .segmented button { padding: 0.35rem 0.7rem; }
    }

@media (max-width: 480px) {
  .links .btn { flex: 1 1 100%; justify-content: center; }
}

/* --------------------------------------------------------------- print --- */

@media print {
  .topnav, .lightbox, .controls, .fig-zoom::after { display: none !important; }
  body { background: #fff; }
  section { padding-block: 1.5rem; break-inside: avoid; }
  .chart { display: none; }
  .table-view { display: block !important; }
}