@font-face {
  font-family: "Comic Neue";
  src: url("../fonts/ComicNeue-Regular.ttf") format("truetype");
  font-weight: 400;
  font-display: swap;
}

@font-face {
  font-family: "Comic Neue";
  src: url("../fonts/ComicNeue-Bold.ttf") format("truetype");
  font-weight: 700;
  font-display: swap;
}

:root {
  /* ---- palette (unchanged) ---- */
  --bg: #ffffff;
  --paper: #ffffff;
  --surface: #ffffff;
  --surface-soft: #f2f2f0;
  --ink: #171717;
  --muted: #5c5c5c;
  --line: #d4d4d2;
  --line-strong: #1c1c1c;
  --blue: #2f72bd;
  --blue-soft: #e8f2ff;
  --green: #2c8a5f;
  --green-soft: #e8f5ef;
  --purple: #7659bf;
  --purple-soft: #f0ebff;
  --rust: #bd5b35;
  --rust-soft: #fff0e8;
  --gold: #8a6818;
  --gold-soft: #fff5d6;
  --nav: #ffffff;

  /* ---- fluid type scale (rem-based, respects zoom) ---- */
  --text-xs: clamp(0.72rem, 0.69rem + 0.12vw, 0.80rem);
  --text-sm: clamp(0.82rem, 0.79rem + 0.15vw, 0.90rem);
  --text-base: clamp(0.95rem, 0.91rem + 0.22vw, 1.05rem);
  --text-lead: clamp(1.05rem, 1.00rem + 0.40vw, 1.20rem);
  --text-h3: clamp(1.10rem, 1.02rem + 0.40vw, 1.30rem);
  --text-h2: clamp(1.55rem, 1.18rem + 1.85vw, 2.40rem);
  --text-h1: clamp(2.00rem, 1.48rem + 2.70vw, 3.05rem);

  /* ---- spacing (8pt + fluid rhythm) ---- */
  --space-2xs: 4px;
  --space-xs: 8px;
  --space-sm: 12px;
  --space-md: 16px;
  --space-lg: 24px;
  --space-xl: 32px;
  --space-2xl: 48px;
  --gutter: clamp(1rem, 0.6rem + 1.8vw, 2.25rem);
  --section-y: clamp(2.5rem, 1.7rem + 3.6vw, 4.75rem);

  /* ---- containers ---- */
  --content-max: 1180px;
  --content-wide: 1320px;
  --measure: 70ch;

  /* ---- the one accent: rust. Everything else is neutral. ---- */
  --accent: #e23b1e;
  --accent-soft: #fdece9;
  --accent-ink: #b5240f;
  --ink-soft: #3b3b3b; /* single token for secondary body text */

  /* ---- shape + elevation ---- */
  --radius: 3px;
  --radius-sm: 2px;
  --radius-pill: 999px;
  --shadow-sm: 0 1px 2px rgba(20, 20, 20, 0.05);
  --shadow-md: 0 2px 10px rgba(20, 20, 20, 0.1);

  /* ---- frosted glass system for floating chrome ---- */
  --glass-blur: blur(0);
  --glass-line: color-mix(in srgb, var(--line) 70%, transparent);
  --shadow-float: 0 6px 22px -10px rgba(20, 20, 20, 0.22);
  --shadow-sheet: 0 -12px 40px -12px rgba(20, 24, 30, 0.35);

  --nav-bar-h: 3.25rem;
  --focus-ring: 3px solid rgba(226, 59, 30, 0.7);

  --font-display: ui-sans-serif, "Helvetica Neue", Helvetica, Arial, system-ui, sans-serif;
  --font-ui: ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", Arial, sans-serif;
  --font-mono: ui-monospace, "SF Mono", Menlo, Consolas, "Liberation Mono", monospace;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--nav-bar-h) + var(--space-sm));
}

body {
  margin: 0;
  /* top wash derived from the palette so every theme keeps its own bg tint (no hardcoded cool gray) */
  background:
    linear-gradient(180deg, color-mix(in srgb, var(--surface) 78%, transparent), color-mix(in srgb, var(--bg) 92%, transparent) 280px),
    var(--bg);
  color: var(--ink);
  font-family: var(--font-ui);
  font-size: var(--text-base);
  line-height: 1.5;
}

img,
svg {
  display: block;
  max-width: 100%;
  height: auto;
}

a {
  color: inherit;
  text-decoration: none;
}

button,
input,
select {
  font: inherit;
}

:focus-visible {
  outline: var(--focus-ring);
  outline-offset: 2px;
}

/* ============ utilities ============ */

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* the [hidden] attribute must win over component display rules */
[hidden] {
  display: none !important;
}

.skip-link {
  position: fixed;
  top: var(--space-xs);
  left: var(--space-xs);
  z-index: 100;
  padding: 10px 16px;
  border-radius: var(--radius);
  background: var(--ink);
  color: #fff;
  font-weight: 800;
  transform: translateY(-160%);
  transition: transform 140ms ease;
}

.skip-link:focus-visible {
  transform: translateY(0);
}

.container {
  width: min(var(--content-max), 100% - 2 * var(--gutter));
  margin-inline: auto;
}

.surface,
.embedded-figure,
.definition-notes article,
.matrix-wrap,
.paper-card,
.update-grid article {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  box-shadow: var(--shadow-sm);
}

/* one label recipe for every micro-label — neutral; rust is reserved for active/accent state */
.eyebrow,
.mini-label,
.control-label {
  margin: 0 0 var(--space-sm);
  color: var(--muted);
  font-size: var(--text-xs);
  font-weight: 800;
  letter-spacing: 0.02em;
  text-transform: uppercase;
}

/* ============ side nav ============ */

.side-nav {
  position: sticky;
  top: 0;
  z-index: 30;
  min-height: var(--nav-bar-h);
  padding-block: var(--space-xs);
  padding-inline: 0;
  background: color-mix(in srgb, var(--nav) 78%, transparent);
  -webkit-backdrop-filter: var(--glass-blur);
          backdrop-filter: var(--glass-blur);
  border-bottom: 1px solid var(--glass-line);
  box-shadow: 0 6px 20px -14px rgba(27, 33, 42, 0.25);
}

.nav-inner {
  width: min(var(--content-max), 100% - 2 * var(--gutter));
  margin-inline: auto;
  display: flex;
  align-items: center;
  gap: var(--space-md);
}

.nav-title {
  display: flex;
  align-items: baseline;
  flex: 0 0 auto;
  gap: 8px;
}

/* boxless typographic wordmark — the single accent lands on A (Action) */
.wm {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.1rem;
  letter-spacing: 0.04em;
  color: var(--ink);
}

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

.wm-sub {
  font-size: var(--text-xs);
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--muted);
  transition: color 140ms ease;
}

.nav-title:hover .wm-sub {
  color: var(--ink);
}

.side-nav nav {
  display: flex;
  flex: 1 1 auto;
  gap: var(--space-2xs);
  min-width: 0;
  overflow-x: auto;
  scrollbar-width: none;
  scroll-snap-type: x proximity;
  -webkit-mask-image: linear-gradient(90deg, #000 0, #000 calc(100% - 16px), transparent);
          mask-image: linear-gradient(90deg, #000 0, #000 calc(100% - 16px), transparent);
}

.side-nav nav::-webkit-scrollbar {
  display: none;
}

.side-nav nav a {
  display: inline-flex;
  align-items: center;
  flex: 0 0 auto;
  scroll-snap-align: start;
  padding: 0 var(--space-sm);
  min-height: 34px;
  border-radius: var(--radius-sm);
  color: #41464d;
  font-size: var(--text-sm);
  font-weight: 750;
  white-space: nowrap;
}

.side-nav nav a:hover {
  color: var(--ink);
  background: rgba(255, 255, 255, 0.7);
}

.side-nav nav a[aria-current="true"] {
  color: var(--ink);
  background: transparent;
  text-decoration: underline;
  text-decoration-color: var(--accent);
  text-decoration-thickness: 2px;
  text-underline-offset: 6px;
}

/* the 5 short links fit without scrolling here, so drop the edge fade */
@media (min-width: 48rem) {
  .side-nav nav {
    -webkit-mask-image: none;
            mask-image: none;
  }
}

/* ============ page shell ============ */

.page-shell {
  width: 100%;
  overflow-x: clip;
}

.paper-hero,
.content-section,
.site-footer {
  width: min(var(--content-max), 100% - 2 * var(--gutter));
  margin-inline: auto;
}

/* ============ hero ============ */

.paper-hero {
  position: relative;
  overflow: hidden;
  width: 100%;
  min-height: clamp(360px, 56svh, 560px);
  margin: 0;
  display: grid;
  place-items: center;
  padding: var(--section-y) var(--gutter);
  background:
    linear-gradient(180deg, rgba(247, 248, 250, 0.12) 0%, rgba(247, 248, 250, 0.46) 64%, var(--bg) 100%),
    linear-gradient(90deg, rgba(255, 255, 255, 0.93) 0%, rgba(255, 255, 255, 0.82) 42%, rgba(255, 255, 255, 0.58) 72%, rgba(255, 255, 255, 0.78) 100%),
    url("../img/figures/hero-wam-future.png") center center / cover no-repeat;
}

@supports not (height: 1svh) {
  .paper-hero {
    min-height: clamp(360px, 56vh, 560px);
  }
}

.paper-hero::after {
  content: "";
  position: absolute;
  right: 0;
  bottom: -1px;
  left: 0;
  height: 140px;
  background: linear-gradient(180deg, rgba(247, 248, 250, 0) 0%, var(--bg) 88%);
  pointer-events: none;
}

.paper-hero > * {
  position: relative;
  z-index: 1;
}

.academic-title-block {
  width: 100%;
  text-align: center;
}

.paper-hero h1,
.paper-hero .author-list,
.paper-hero .affiliation-line,
.paper-hero .hero-summary {
  text-shadow: 0 1px 20px rgba(255, 255, 255, 0.9);
}

@media (max-width: 760px) {
  .paper-hero {
    background:
      linear-gradient(180deg, rgba(247, 248, 250, 0.18) 0%, rgba(247, 248, 250, 0.58) 68%, var(--bg) 100%),
      linear-gradient(90deg, rgba(255, 255, 255, 0.96) 0%, rgba(255, 255, 255, 0.86) 100%),
      url("../img/figures/hero-wam-future.png") 58% center / cover no-repeat;
  }
}

/* ============ headings & prose ============ */

h1,
h2,
h3,
p,
dd,
strong {
  margin-top: 0;
  overflow-wrap: break-word;
}

h1,
h2,
h3,
.nav-title strong,
.nav-title span {
  font-family: var(--font-display);
}

h1 {
  margin: 0 auto var(--space-2xs);
  /* keep the title on ONE line in every browser (24ch wrapped in Safari),
     scaling down on narrow screens so it never overflows */
  font-size: clamp(1.05rem, 5.3vw, 3.05rem);
  line-height: 1.1;
  white-space: nowrap;
}

.hero-subtitle {
  margin: 0 auto var(--space-md);
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.15rem, 0.9rem + 1.1vw, 1.7rem);
  letter-spacing: 0.01em;
  color: var(--accent);
}

h2 {
  margin-bottom: var(--space-sm);
  font-size: var(--text-h2);
  line-height: 1.1;
}

h3 {
  margin-bottom: var(--space-xs);
  font-size: var(--text-h3);
  line-height: 1.2;
}

.hero-summary {
  max-width: 60ch;
  margin: var(--space-lg) auto 0;
  color: var(--ink-soft);
  font-size: var(--text-lead);
  line-height: 1.4;
}

.hero-links {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--space-xs);
  margin: var(--space-lg) auto 0;
}

.hero-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  min-height: 40px;
  padding: 0 var(--space-md);
  border: 1px solid var(--line);
  border-radius: var(--radius-pill);
  background: var(--surface);
  color: var(--ink);
  font-weight: 800;
  font-size: var(--text-sm);
  box-shadow: var(--shadow-sm);
}

.hero-link:hover {
  border-color: var(--line-strong);
}

.hero-link--primary {
  background: var(--ink);
  border-color: var(--ink);
  color: #fff;
}

/* ============ citation page ============ */

.citation-page {
  min-height: calc(100svh - var(--nav-bar-h));
}

.citation-section {
  max-width: 920px;
}

.citation-card {
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  box-shadow: var(--shadow-sm);
}

.citation-card-head {
  display: flex;
  align-items: start;
  justify-content: space-between;
  gap: var(--space-md);
  padding: var(--space-lg);
  border-bottom: 1px solid var(--line);
}

.citation-card-head h2 {
  margin: 0 0 var(--space-2xs);
  font-size: clamp(1.25rem, 1rem + 1vw, 1.75rem);
}

.citation-card-head p {
  margin: 0;
  color: var(--muted);
}

.copy-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 32px;
  padding: 0 var(--space-sm);
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-pill);
  background: var(--ink);
  color: #fff;
  font-size: var(--text-xs);
  font-weight: 850;
  cursor: pointer;
}

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

.bibtex-details {
  padding: var(--space-md) var(--space-lg) var(--space-lg);
}

.bibtex-details summary {
  width: fit-content;
  cursor: pointer;
  color: var(--ink);
  font-weight: 850;
}

.bibtex-block {
  margin: var(--space-md) 0 0;
  padding: var(--space-md);
  overflow-x: auto;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #f8f8f6;
  color: var(--ink);
  font-family: var(--font-mono);
  font-size: clamp(0.78rem, 0.74rem + 0.18vw, 0.92rem);
  line-height: 1.55;
}

.bibtex-block code {
  font: inherit;
  white-space: pre;
}

.copy-status {
  min-height: 1.4em;
  margin: 0;
  padding: 0 var(--space-lg) var(--space-lg);
  color: var(--muted);
  font-size: var(--text-sm);
}

.citation-back {
  margin: var(--space-lg) 0 0;
}

.citation-back a {
  color: var(--accent-ink);
  font-weight: 800;
}

@media (max-width: 47.99rem) {
  .citation-card-head {
    align-items: stretch;
    flex-direction: column;
  }

  .copy-button {
    align-self: flex-start;
  }
}

.author-list {
  margin: 0 auto var(--space-2xs);
  color: var(--ink);
  font-size: var(--text-lead);
  font-weight: 750;
}

.affiliation-line {
  margin: 0 auto;
  color: var(--muted);
  font-size: var(--text-base);
}

/* ============ generic sections ============ */

.content-section {
  padding-block: var(--section-y);
  scroll-margin-top: calc(var(--nav-bar-h) + var(--space-sm));
}

.section-heading {
  margin-bottom: var(--space-lg);
}

.section-heading p:not(.eyebrow) {
  max-width: var(--measure);
  color: var(--ink-soft);
  font-size: var(--text-lead);
}

.embedded-figure {
  margin: 0;
  overflow: hidden;
}

.embedded-figure img {
  width: 100%;
  background: #f8f9fb;
}

.embedded-figure figcaption {
  padding: var(--space-sm) var(--space-md) var(--space-md);
  color: var(--muted);
  border-top: 1px solid var(--line);
  font-size: var(--text-sm);
}

.timeline-figure {
  background: var(--surface);
}

/* ---- data-driven hand-drawn timeline ---- */
.timeline {
  position: relative;
  padding: var(--space-lg) var(--space-lg) var(--space-md);
}

.tl-grid {
  position: absolute;
  left: var(--space-lg);
  right: var(--space-lg);
  top: var(--space-lg);
  bottom: calc(var(--space-md) + 22px);
  pointer-events: none;
}

.tl-gridline {
  position: absolute;
  top: 0;
  bottom: 0;
  border-left: 1px dashed var(--line);
}

.tl-lanes {
  position: relative;
}

.tl-lane {
  position: relative;
  padding: var(--space-xs) 0;
}

.tl-lane + .tl-lane {
  border-top: 1px dashed var(--line);
}

.tl-lane-head {
  display: flex;
  align-items: baseline;
  gap: var(--space-xs);
  margin-bottom: 2px;
}

.tl-lane-name {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: var(--text-sm);
  color: var(--ink);
}

.tl-lane-count {
  font-size: var(--text-xs);
  color: var(--muted);
  font-variant-numeric: tabular-nums;
}

.tl-track {
  position: relative;
  height: 38px;
}

.tl-dot {
  position: absolute;
  width: 11px;
  height: 11px;
  border-radius: 50%;
  transform: translate(-50%, -50%);
  /* translucent so overlapping dots darken (density reads) instead of forming a flat smear */
  background: color-mix(in srgb, var(--ink) 40%, transparent);
  cursor: default;
  transition: transform 120ms ease, background 120ms ease;
}

.tl-dot:hover {
  background: var(--accent);
  transform: translate(-50%, -50%) scale(1.9);
  z-index: 3;
}

@media (max-width: 30rem) {
  .tl-dot {
    width: 8px;
    height: 8px;
  }
}

.tl-tip {
  position: fixed;
  z-index: 80;
  max-width: 260px;
  padding: 7px 10px;
  border-radius: var(--radius-sm);
  background: var(--ink);
  color: #fff;
  font-size: var(--text-xs);
  line-height: 1.4;
  pointer-events: none;
  opacity: 0;
  transition: opacity 110ms ease;
  box-shadow: var(--shadow-md);
}

.tl-tip.is-on {
  opacity: 1;
}

.tl-tip strong {
  display: block;
  font-weight: 800;
}

.tl-tip-date {
  display: block;
  margin-top: 2px;
  color: rgba(255, 255, 255, 0.65);
}

.tl-axis {
  position: relative;
  height: 22px;
  margin-top: var(--space-xs);
}

.tl-year {
  position: absolute;
  transform: translateX(-50%);
  font-size: var(--text-xs);
  font-weight: 700;
  color: var(--muted);
  font-variant-numeric: tabular-nums;
}

.definition-grid {
  display: grid;
  gap: var(--space-lg);
}

/* definition diagram = one framed illustration, panels filling it */
.def-body {
  padding: clamp(var(--space-md), 2.5vw, var(--space-xl));
}

/* notation legend */
.def-legend {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-xs) var(--space-lg);
  margin: 0 0 var(--space-lg);
  color: var(--muted);
  font-size: var(--text-sm);
}

.def-legend span {
  white-space: nowrap;
}

.def-legend b {
  margin-right: 5px;
  color: var(--ink);
  font-family: var(--font-mono);
  font-weight: 700;
}

/* input → model → output signature cards: 1-up below 56rem, 3-up above (skip the 2+1 orphan) */
.def-arch {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-md);
}

@media (min-width: 56rem) {
  .def-arch {
    grid-template-columns: repeat(3, 1fr);
  }
}

.def-box {
  display: grid;
  gap: var(--space-2xs);
  justify-items: center;
  text-align: center;
  padding: var(--space-md);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface-soft);
}

.def-box--wam {
  border-color: color-mix(in srgb, var(--accent) 40%, var(--line));
  background: var(--accent-soft);
}

.def-name {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: var(--text-base);
  color: var(--ink);
}

.def-box--wam .def-name {
  color: var(--accent-ink);
}

.def-sub {
  color: var(--muted);
  font-size: var(--text-xs);
}

.def-sig {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: 5px;
  margin: var(--space-2xs) 0;
}

.tok {
  display: inline-grid;
  place-items: center;
  min-width: 24px;
  height: 24px;
  padding: 0 6px;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: var(--surface);
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: var(--text-sm);
  color: var(--ink);
}

.tok--wam {
  border-color: var(--accent);
  background: var(--surface);
  color: var(--accent-ink);
}

.def-to {
  color: var(--muted);
  font-style: normal;
  font-size: 1rem;
}

.def-to--wam {
  color: var(--accent);
}

.def-f {
  justify-self: stretch;
  text-align: center;
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  color: var(--muted);
}

/* ---- inline flow diagrams (contrast trio: does the future reach the action?) ---- */
.def-flow {
  width: 100%;
  height: auto;
  margin: var(--space-2xs) 0;
  overflow: visible;
}
.def-flow text {
  text-anchor: middle;
  dominant-baseline: central;
  font-family: var(--font-mono);
  font-weight: 700;
}
.df-pill,
.df-model,
.df-node {
  fill: var(--surface);
  stroke: var(--line-strong);
  stroke-width: 1.5;
}
.df-letter {
  fill: var(--ink);
  font-size: 16px;
}
.df-model-label {
  fill: var(--ink-soft);
  font-size: 15px;
}
.df-edge {
  fill: none;
  stroke: var(--line-strong);
  stroke-width: 2;
}
.df-head {
  fill: var(--line-strong);
  stroke: none;
}
/* accent marks WAM-ness only: its predicted future feeds forward into the action */
.df-node--future,
.df-node--act {
  fill: var(--accent-soft);
  stroke: var(--accent);
}
.df-letter--future,
.df-letter--act {
  fill: var(--accent-ink);
}
.df-edge--facing {
  stroke: var(--accent);
  stroke-width: 2.8;
}
.df-head--facing {
  fill: var(--accent);
}

.def-rule {
  margin: var(--space-lg) 0;
  padding-top: var(--space-md);
  border-top: 1px dashed var(--line);
  color: var(--muted);
  font-size: var(--text-sm);
}

.def-rule--neg {
  margin-bottom: 0;
}

.definition-notes {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-sm);
}

@media (min-width: 48rem) {
  .definition-notes {
    grid-template-columns: repeat(3, 1fr);
  }
}

.definition-notes article {
  padding: var(--space-md);
}

.definition-notes p {
  margin-bottom: 0;
  color: var(--ink-soft);
}

/* ============ explorer ============ */

.explorer-section {
  width: min(var(--content-max), 100% - 2 * var(--gutter));
}

/* matrix band */
.matrix-wrap {
  margin: 0 0 var(--space-md);
  padding: var(--space-md);
}

.matrix-head {
  display: flex;
  align-items: baseline;
  gap: var(--space-sm);
  margin-bottom: var(--space-sm);
}

.matrix-head .mini-label {
  margin: 0;
}

.matrix-head h3 {
  margin: 0;
}

/* table layout (default for wider matrix): 5 cols, no margin cells */
.matrix.is-table {
  display: grid;
  grid-template-columns: minmax(8rem, 1.3fr) repeat(4, minmax(2.6rem, 1fr));
  gap: var(--space-2xs);
}

.matrix .m-corner {
  display: flex;
}

/* axis labels = a different primitive than heat cells (never tinted, never summable) */
.matrix .m-rowhead,
.matrix .m-colhead {
  display: grid;
  gap: 2px;
  align-content: center;
  padding: var(--space-2xs) var(--space-xs);
  border: 1px solid transparent;
  border-radius: var(--radius-sm);
  background: var(--surface-soft);
  color: var(--ink);
  cursor: pointer;
  font: inherit;
  text-align: left;
}

.matrix .m-colhead {
  justify-items: center;
  text-align: center;
}

.matrix .m-axis-name {
  font-size: var(--text-xs);
  font-weight: 850;
  line-height: 1.1;
}

.matrix .m-axis-size {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.matrix .m-axis-num {
  font-size: var(--text-xs);
  font-weight: 850;
  color: var(--muted);
  font-variant-numeric: tabular-nums;
}

.matrix .m-axis-bar {
  display: inline-block;
  width: 42px;
  height: 3px;
  border-radius: 2px;
  background: linear-gradient(90deg, var(--line-strong) var(--w), color-mix(in srgb, var(--line) 60%, transparent) var(--w));
}

.matrix .m-rowhead[aria-pressed="true"],
.matrix .m-colhead[aria-pressed="true"] {
  box-shadow: inset 0 0 0 2px var(--accent);
  color: var(--accent-ink);
}

.matrix .m-cell {
  --t: 0;
  display: grid;
  align-content: center;
  justify-items: center;
  gap: 1px;
  min-height: 3.1rem;
  padding: var(--space-2xs);
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: var(--surface-soft);
  background: color-mix(in oklab, var(--ink) calc(3% + var(--t) * 0.6%), var(--surface));
  color: var(--ink);
  cursor: pointer;
  font: inherit;
}

.matrix .m-cell.is-hot {
  color: var(--surface);
}

.matrix .m-cell.is-hot .m-sublabel {
  opacity: 0.85;
}

.matrix .m-cell[aria-pressed="true"] {
  box-shadow: inset 0 0 0 2px var(--accent);
}

.matrix .m-cell:focus-visible {
  outline: var(--focus-ring);
  outline-offset: 2px;
}

.matrix .m-cell[aria-disabled="true"] {
  cursor: default;
  color: var(--muted);
  background: var(--surface);
}

.matrix .m-count {
  font-size: clamp(1rem, 0.9rem + 0.4vw, 1.2rem);
  font-weight: 900;
  font-variant-numeric: tabular-nums;
  line-height: 1;
}

.matrix .m-sublabel {
  font-size: 0.62rem;
  font-weight: 700;
  color: inherit;
  opacity: 0.72;
}

/* legend + caption below the grid */
.matrix-cap {
  grid-column: 1 / -1;
  margin-top: var(--space-sm);
  padding-top: var(--space-xs);
  border-top: 1px solid var(--line);
}

.m-legend {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
  font-size: var(--text-xs);
  color: var(--muted);
}

.m-legend-track {
  flex: 0 0 120px;
  height: 8px;
  border-radius: var(--radius-pill);
  background: linear-gradient(90deg, var(--surface), color-mix(in oklab, var(--ink) 63%, var(--surface)));
  border: 1px solid var(--line);
}

.matrix-note {
  margin: var(--space-xs) 0 0;
  color: var(--muted);
  font-size: var(--text-xs);
  line-height: 1.45;
}

.matrix-total {
  margin: var(--space-2xs) 0 0;
  color: var(--ink);
  font-variant-numeric: tabular-nums;
}

/* stacked layout (small screens) */
.matrix.is-stacked {
  display: grid;
  gap: var(--space-sm);
}

.matrix.is-stacked .m-block {
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  padding: var(--space-xs);
  background: var(--surface);
}

.matrix.is-stacked .m-block-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: var(--space-xs);
  margin-bottom: var(--space-xs);
  cursor: pointer;
}

.matrix.is-stacked .m-block-head[aria-pressed="true"] {
  color: var(--accent-ink);
}
/* underline the name only, not the whole flex row (name + count + bar) */
.matrix.is-stacked .m-block-head[aria-pressed="true"] .m-block-name {
  text-decoration: underline;
  text-decoration-color: var(--accent);
  text-underline-offset: 3px;
}

.matrix.is-stacked .m-block-name {
  font-weight: 850;
  font-size: var(--text-sm);
}

.matrix.is-stacked .m-block-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-2xs);
}

.matrix.is-stacked .m-cell {
  grid-template-columns: 1fr auto;
  grid-auto-flow: column;
  justify-items: start;
  align-content: center;
  min-height: 2.6rem;
  text-align: left;
}

.matrix.is-stacked .m-cell .m-sublabel {
  order: -1;
  opacity: 0.9;
}

.matrix .m-foot {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-xs);
  align-items: center;
  padding-top: var(--space-xs);
  margin-top: var(--space-xs);
  border-top: 1px dashed var(--line);
  font-size: var(--text-xs);
  color: var(--muted);
  font-variant-numeric: tabular-nums;
}

.matrix .m-foot strong {
  color: var(--ink);
}

/* shell: single column (mobile), two-pane at >=60rem */
.explorer-shell {
  display: block;
}

.papers-workspace {
  min-width: 0;
}

/* toolbar */
.toolbar {
  position: sticky;
  top: calc(var(--nav-bar-h) + var(--space-sm));
  z-index: 6;
  margin-bottom: var(--space-sm);
  padding: var(--space-sm);
  display: grid;
  gap: var(--space-xs);
  border: 1px solid var(--glass-line);
  border-radius: var(--radius);
  background: color-mix(in srgb, var(--surface) 70%, transparent);
  -webkit-backdrop-filter: var(--glass-blur);
          backdrop-filter: var(--glass-blur);
  box-shadow: var(--shadow-sm);
  transition: background 160ms ease, box-shadow 160ms ease;
}

.toolbar.is-stuck {
  background: color-mix(in srgb, var(--surface) 64%, transparent);
  box-shadow: var(--shadow-float);
}

.toolbar-sentinel {
  height: 1px;
  margin: 0;
}

.toolbar__row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-xs);
}

.result-meta {
  flex: 0 0 auto;
  line-height: 1.05;
}

.result-meta .mini-label {
  margin: 0;
}

.result-meta strong {
  font-size: var(--text-base);
  font-variant-numeric: tabular-nums;
}

.meta-updated {
  margin-left: auto;
  text-align: right;
  color: var(--muted);
}

.meta-updated strong {
  color: var(--muted);
  font-weight: 700;
  font-size: var(--text-sm);
}

.search-block {
  position: relative;
  flex: 1 1 12rem;
  min-width: 0;
}

.search-block input {
  width: 100%;
  padding-right: 2.2rem;
}

.search-clear {
  position: absolute;
  top: 50%;
  right: 6px;
  transform: translateY(-50%);
  width: 26px;
  height: 26px;
  display: grid;
  place-items: center;
  border: 0;
  border-radius: var(--radius-pill);
  background: var(--surface-soft);
  color: var(--muted);
  cursor: pointer;
}

.sort-block {
  flex: 0 0 auto;
}

input[type="search"],
select {
  min-height: 40px;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: var(--surface-soft);
  color: var(--ink);
  padding: 0 var(--space-sm);
}

.filters-btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2xs);
  min-height: 40px;
  padding: 0 var(--space-md);
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: var(--surface-soft);
  color: var(--ink);
  font-weight: 800;
  cursor: pointer;
}

.filters-count {
  display: inline-grid;
  place-items: center;
  min-width: 1.25rem;
  height: 1.25rem;
  padding: 0 5px;
  border-radius: var(--radius-pill);
  background: var(--accent);
  color: #fff;
  font-size: var(--text-xs);
  font-weight: 850;
}

/* active filter chips */
.toolbar__chips {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2xs);
}

.toolbar__chips:empty {
  display: none;
}

.chip {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  min-height: 28px;
  padding: 0 var(--space-2xs) 0 var(--space-xs);
  border: 1px solid color-mix(in srgb, var(--accent) 38%, var(--line));
  border-radius: var(--radius-pill);
  background: color-mix(in srgb, var(--accent) 10%, var(--surface));
  color: var(--accent-ink);
  font-size: var(--text-xs);
  font-weight: 800;
  cursor: pointer;
}

.chip .chip-x {
  display: grid;
  place-items: center;
  width: 18px;
  height: 18px;
  border-radius: var(--radius-pill);
  background: color-mix(in srgb, var(--accent) 16%, transparent);
  font-size: 0.9rem;
  line-height: 1;
}

/* filter rail / sheet */
.filter-panel {
  position: fixed;
  inset: auto 0 0 0;
  z-index: 60;
  display: grid;
  gap: var(--space-xs);
  align-content: start;
  max-height: 86svh;
  padding: var(--space-md);
  padding-bottom: calc(var(--space-md) + env(safe-area-inset-bottom));
  overflow-y: auto;
  overscroll-behavior: contain;
  background: color-mix(in srgb, var(--surface) 92%, transparent);
  -webkit-backdrop-filter: saturate(160%) blur(20px);
          backdrop-filter: saturate(160%) blur(20px);
  border-top: 1px solid var(--glass-line);
  border-radius: 16px 16px 0 0;
  box-shadow: var(--shadow-sheet);
  transform: translateY(101%);
  visibility: hidden;
  transition: transform 220ms ease;
}

body.filters-open .filter-panel {
  transform: none;
  visibility: visible;
}

.filter-panel__head {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-sm);
  padding-top: var(--space-sm);
}

.filter-panel__head::before {
  content: "";
  position: absolute;
  top: 6px;
  left: 50%;
  transform: translateX(-50%);
  width: 36px;
  height: 4px;
  border-radius: 2px;
  background: var(--line-strong);
}

.filter-panel__head .mini-label {
  margin: 0;
}

.sheet-close {
  width: 34px;
  height: 34px;
  display: grid;
  place-items: center;
  border: 1px solid var(--line);
  border-radius: var(--radius-pill);
  background: var(--surface-soft);
  color: var(--ink);
  font-size: 1.2rem;
  cursor: pointer;
}

.filter-subhead {
  margin: var(--space-2xs) 0 0;
  padding-top: var(--space-xs);
  border-top: 1px solid var(--line);
}

.sheet-backdrop {
  position: fixed;
  inset: 0;
  z-index: 55;
  background: rgba(20, 24, 30, 0.32);
  -webkit-backdrop-filter: blur(2px);
          backdrop-filter: blur(2px);
  border: 0;
}

.control-block {
  display: grid;
  gap: var(--space-xs);
}

.control-label {
  margin: 0;
}

.segmented {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2xs);
}

.segmented button {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  min-height: 26px;
  padding: 0 9px;
  border: 1px solid var(--line);
  border-radius: var(--radius-pill);
  color: #3f4650;
  background: var(--surface-soft);
  cursor: pointer;
  font-size: var(--text-xs);
  font-weight: 760;
}

.segmented.compact button {
  font-size: 0.74rem;
  padding: 0 8px;
}

.segmented button .opt-count {
  font-variant-numeric: tabular-nums;
  font-weight: 850;
  color: var(--muted);
  font-size: 0.72em;
}

.segmented button[aria-pressed="true"] {
  color: #fff;
  background: var(--accent);
  border-color: var(--accent);
}

.segmented button[aria-pressed="true"] .opt-count {
  color: rgba(255, 255, 255, 0.85);
}

.segmented button[disabled] {
  opacity: 0.42;
  cursor: not-allowed;
}

.clear-button {
  min-height: 40px;
  margin-top: var(--space-2xs);
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: var(--surface-soft);
  color: var(--ink);
  font-weight: 850;
  cursor: pointer;
}

/* paper list + cards — true masonry: JS positions cards absolutely so they keep
   their natural heights and pack tightly, while the placement order (shortest
   column first) keeps the sorted order reading left-to-right across the top */
.paper-list {
  position: relative;
}

.paper-card {
  position: absolute;
  top: 0;
  left: 0;
  min-width: 0;
  padding: var(--space-md);
  transition: border-color 150ms ease, box-shadow 150ms ease;
}

.paper-card[hidden] {
  display: none;
}

.paper-card:hover {
  border-color: var(--line-strong);
  box-shadow: var(--shadow-md);
}

/* shortName + arXiv link share one line; full title drops below, full width */
.paper-top {
  display: flex;
  flex-wrap: nowrap;
  gap: var(--space-sm);
  align-items: baseline;
  justify-content: space-between;
}

.paper-card h3 {
  min-width: 0;
  margin-bottom: 0;
  font-size: var(--text-h3);
}

.paper-title {
  margin-top: var(--space-2xs);
  color: var(--ink-soft);
  font-size: var(--text-sm);
}

/* tier 2: citation/date/source = plain dot-separated metadata, as a card footer */
.paper-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  margin-top: var(--space-sm);
  padding-top: var(--space-sm);
  border-top: 1px solid var(--line);
  color: var(--muted);
}

.meta-chip {
  display: inline-flex;
  align-items: center;
  color: var(--muted);
  font-size: var(--text-xs);
  font-weight: 700;
}

.meta-chip.citations {
  color: var(--ink);
  font-weight: 800;
}

.meta-chip + .meta-chip::before {
  content: "·";
  margin: 0 var(--space-xs);
  color: var(--line-strong);
}

/* tier 3: taxonomy classification = pills */
.tag {
  min-height: 26px;
  display: inline-flex;
  align-items: center;
  border-radius: var(--radius-pill);
  padding: 0 var(--space-xs);
  font-size: var(--text-xs);
  font-weight: 800;
  border: 1px solid var(--line);
  background: var(--surface-soft);
  overflow-wrap: anywhere;
}

.paper-tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2xs);
  margin-bottom: var(--space-sm);
}

/* only the philosophy tag carries the single accent; the other four stay neutral */
.paper-tags .tag[class*="philosophy-"] {
  color: var(--accent-ink);
  background: var(--accent-soft);
  border-color: color-mix(in srgb, var(--accent) 35%, var(--line));
}

.paper-summary {
  margin-bottom: var(--space-sm);
  color: var(--ink-soft);
  font-size: var(--text-sm);
}

.paper-summary mark,
.paper-card h3 mark,
.paper-title mark {
  background: var(--accent-soft);
  color: inherit;
  border-radius: 4px;
  padding: 0 2px;
}

.paper-bottom {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-xs);
}

.arxiv-link {
  flex: 0 0 auto;
  min-height: 30px;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 0 var(--space-sm);
  border-radius: var(--radius-pill);
  color: #fff;
  background: var(--ink);
  font-size: var(--text-xs);
  font-weight: 850;
  white-space: nowrap;
}

.backbone-detail {
  color: var(--muted);
  font-size: var(--text-sm);
}

/* density: compact hides the prose rows */
body[data-density="compact"] .paper-summary,
body[data-density="compact"] .paper-bottom {
  display: none;
}

body[data-density="compact"] .paper-card {
  padding: var(--space-sm) var(--space-md);
}

/* skeleton + empty/error states */
.skeleton {
  position: relative;
  overflow: hidden;
  min-height: 150px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface-soft);
}

.skeleton::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.6), transparent);
  transform: translateX(-100%);
  animation: shimmer 1.3s infinite;
}

@keyframes shimmer {
  100% {
    transform: translateX(100%);
  }
}

.state-card {
  padding: var(--space-2xl) var(--space-lg);
  text-align: center;
  color: var(--muted);
  border: 1px dashed var(--line-strong);
  border-radius: var(--radius);
  background: var(--surface);
}

.state-card strong {
  display: block;
  margin-bottom: var(--space-sm);
  color: var(--ink);
  font-size: var(--text-lead);
}

.state-card button {
  margin-top: var(--space-md);
  min-height: 40px;
  padding: 0 var(--space-lg);
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: var(--surface-soft);
  color: var(--ink);
  font-weight: 850;
  cursor: pointer;
}

/* ============ metadata + footer ============ */

.update-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: var(--space-md);
}

.update-grid article {
  padding: var(--space-lg);
}

.update-grid p {
  margin-bottom: 0;
  color: var(--ink-soft);
}

.visitor-section {
  width: 100%;
  margin: 0;
  padding: 0;
}

.visitor-map {
  width: 300px;
  margin: 40px auto 60px;
  overflow: hidden;
  text-align: center;
  opacity: 0.9;
}

.visitor-map iframe,
.visitor-map img,
.visitor-map object,
.visitor-map embed,
.visitor-map canvas {
  display: inline-block;
  max-width: 100% !important;
  height: auto;
}

.visitor-map #mapmyvisitors-widget,
.visitor-map .mapmyvisitors-map-container,
.visitor-map .mapmyvisitors-map {
  max-width: 100% !important;
}

.visitor-map #mapmyvisitors-widget {
  width: 300px !important;
  margin-inline: auto !important;
}

.site-footer {
  min-height: 70px;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-md);
  padding-block: var(--space-md);
  padding-bottom: calc(var(--space-md) + env(safe-area-inset-bottom));
  color: var(--muted);
  border-top: 1px solid var(--line);
}

.site-footer a {
  color: var(--ink);
  font-weight: 850;
  padding: var(--space-2xs) 0;
}

/* ============ responsive tiers (mobile-first) ============ */

/* tap targets on touch */
@media (pointer: coarse) {
  /* 44px nav links make the bar taller; keep every sticky/anchor offset in sync */
  :root {
    --nav-bar-h: 3.85rem;
  }

  .side-nav nav a,
  .segmented button,
  .filters-btn,
  .clear-button,
  .arxiv-link,
  .chip,
  .matrix .m-cell,
  .matrix .m-rowhead,
  .matrix .m-colhead,
  input[type="search"],
  select,
  .sheet-close,
  .search-clear {
    min-height: 44px;
  }

  .chip {
    padding-right: var(--space-2xs);
  }
}

/* explorer becomes two-pane; filters return to a static rail */
@media (min-width: 60rem) {
  .explorer-shell {
    display: grid;
    grid-template-columns: 17.5rem minmax(0, 1fr);
    gap: var(--space-md);
    align-items: start;
  }

  .filter-panel {
    position: sticky;
    inset: auto;
    top: calc(var(--nav-bar-h) + var(--space-sm));
    z-index: 1;
    max-height: calc(100svh - var(--nav-bar-h) - 2 * var(--space-sm));
    padding: var(--space-md);
    border: 1px solid var(--glass-line);
    border-radius: var(--radius);
    background: color-mix(in srgb, var(--surface) 82%, transparent);
    -webkit-backdrop-filter: var(--glass-blur);
            backdrop-filter: var(--glass-blur);
    box-shadow: var(--shadow-float);
    transform: none;
    visibility: visible;
  }

  .filter-panel__head,
  .filter-panel__head::before,
  .sheet-close,
  .filters-btn {
    display: none;
  }

  .sheet-backdrop {
    display: none !important;
  }
}

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

  *,
  *::before,
  *::after {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
  }
}

/* glass fallbacks: keep floating chrome near-opaque where blur is unsupported */
@supports not ((backdrop-filter: blur(1px)) or (-webkit-backdrop-filter: blur(1px))) {
  .side-nav {
    background: color-mix(in srgb, var(--nav) 96%, transparent);
  }

  .toolbar,
  .toolbar.is-stuck,
  .filter-panel {
    background: color-mix(in srgb, var(--surface) 96%, transparent);
  }
}

@media (prefers-reduced-transparency: reduce) {
  .side-nav {
    background: var(--nav);
  }

  .toolbar,
  .toolbar.is-stuck,
  .filter-panel {
    background: var(--surface);
  }

  .side-nav,
  .toolbar,
  .filter-panel {
    -webkit-backdrop-filter: none;
            backdrop-filter: none;
  }

  .sheet-backdrop {
    -webkit-backdrop-filter: none;
            backdrop-filter: none;
  }
}

/* --- variant: scene --- */
.def-viz-panel[data-viz="scene"] .dv-scene-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-md);
}
@media (min-width: 56rem) {
  .def-viz-panel[data-viz="scene"] .dv-scene-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}
.def-viz-panel[data-viz="scene"] .dv-scene-card {
  display: grid;
  gap: var(--space-2xs);
  align-content: start;
  padding: var(--space-md);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface-soft);
}
.def-viz-panel[data-viz="scene"] .dv-scene-card.is-wam {
  border-color: color-mix(in srgb, var(--accent) 45%, var(--line));
}
.def-viz-panel[data-viz="scene"] .dv-scene-name {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: var(--text-base);
  color: var(--ink);
}
.def-viz-panel[data-viz="scene"] .dv-scene-card.is-wam .dv-scene-name { color: var(--accent-ink); }
.def-viz-panel[data-viz="scene"] .dv-scene-sub {
  margin: 0;
  min-height: 2.6em;
  color: var(--muted);
  font-size: var(--text-xs);
  line-height: 1.3;
}
.def-viz-panel[data-viz="scene"] .dv-scene-f {
  margin: var(--space-2xs) 0 0;
  justify-self: stretch;
  text-align: center;
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  color: var(--muted);
}
.def-viz-panel[data-viz="scene"] .dv-scene-card.is-wam .dv-scene-f { color: var(--accent-ink); }

.def-viz-panel[data-viz="scene"] .dv-scene-svg {
  width: 100%;
  height: auto;
  margin: var(--space-2xs) 0;
  overflow: visible;
}
.def-viz-panel[data-viz="scene"] .dv-scene-svg text {
  text-anchor: middle;
  dominant-baseline: central;
  font-family: var(--font-mono);
  font-weight: 700;
}

/* tile frames */
.def-viz-panel[data-viz="scene"] .dvs-frame {
  fill: var(--surface);
  stroke: var(--line-strong);
  stroke-width: 1.6;
}
.def-viz-panel[data-viz="scene"] .dvs-act-frame--wam {
  stroke: color-mix(in srgb, var(--accent) 55%, var(--line));
}
/* camera viewfinder corner marks = "observation" */
.def-viz-panel[data-viz="scene"] .dvs-cam {
  fill: none;
  stroke: var(--line-strong);
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
}

/* robot gripper */
.def-viz-panel[data-viz="scene"] .dvs-arm { fill: var(--ink-soft); stroke: none; }
.def-viz-panel[data-viz="scene"] .dvs-claw {
  fill: none;
  stroke: var(--ink-soft);
  stroke-width: 4.5;
  stroke-linecap: round;
}
.def-viz-panel[data-viz="scene"] .dvs-box {
  fill: var(--surface-soft);
  stroke: var(--ink-soft);
  stroke-width: 2;
}
.def-viz-panel[data-viz="scene"] .dvs-box-top { fill: var(--ink-soft); stroke: none; opacity: 0.85; }
.def-viz-panel[data-viz="scene"] .dvs-ground {
  fill: none;
  stroke: var(--line-strong);
  stroke-width: 2.4;
  stroke-linecap: round;
}

/* thought bubble = predicted future observation */
.def-viz-panel[data-viz="scene"] .dvs-bubble,
.def-viz-panel[data-viz="scene"] .dvs-bubble-dot {
  fill: var(--surface);
  stroke: var(--line-strong);
  stroke-width: 1.6;
  stroke-dasharray: 5 4;
}
.def-viz-panel[data-viz="scene"] .dvs-bubble-dot { stroke-dasharray: none; }
.def-viz-panel[data-viz="scene"] .dvs-scene--ghost .dvs-arm { fill: var(--muted); }
.def-viz-panel[data-viz="scene"] .dvs-scene--ghost .dvs-claw { stroke: var(--muted); }
.def-viz-panel[data-viz="scene"] .dvs-scene--ghost .dvs-box { stroke: var(--muted); fill: var(--surface); }
.def-viz-panel[data-viz="scene"] .dvs-scene--ghost .dvs-box-top { fill: var(--muted); }
.def-viz-panel[data-viz="scene"] .dvs-bubble--wam {
  fill: var(--accent-soft);
  stroke: var(--accent);
}
.def-viz-panel[data-viz="scene"] .dvs-scene--accent .dvs-arm { fill: var(--accent-ink); }
.def-viz-panel[data-viz="scene"] .dvs-scene--accent .dvs-claw { stroke: var(--accent-ink); }
.def-viz-panel[data-viz="scene"] .dvs-scene--accent .dvs-box { stroke: var(--accent); fill: var(--accent-soft); }
.def-viz-panel[data-viz="scene"] .dvs-scene--accent .dvs-box-top { fill: var(--accent); }

/* joystick = action output */
.def-viz-panel[data-viz="scene"] .dvs-joy-base { fill: var(--surface-soft); stroke: var(--ink-soft); stroke-width: 2; }
.def-viz-panel[data-viz="scene"] .dvs-joy-shaft { fill: none; stroke: var(--ink-soft); stroke-width: 5; stroke-linecap: round; }
.def-viz-panel[data-viz="scene"] .dvs-joy-knob { fill: var(--ink-soft); stroke: none; }
.def-viz-panel[data-viz="scene"] .dvs-joy-tick { fill: none; stroke: var(--ink-soft); stroke-width: 2; stroke-linecap: round; opacity: 0.6; }
.def-viz-panel[data-viz="scene"] .dvs-joy--accent .dvs-joy-base { stroke: var(--accent); fill: var(--accent-soft); }
.def-viz-panel[data-viz="scene"] .dvs-joy--accent .dvs-joy-shaft { stroke: var(--accent-ink); }
.def-viz-panel[data-viz="scene"] .dvs-joy--accent .dvs-joy-knob { fill: var(--accent-ink); }
.def-viz-panel[data-viz="scene"] .dvs-joy--accent .dvs-joy-tick { stroke: var(--accent); }

/* edges */
.def-viz-panel[data-viz="scene"] .dvs-edge { fill: none; stroke: var(--line-strong); stroke-width: 2; }
.def-viz-panel[data-viz="scene"] .dvs-edge-head { fill: var(--line-strong); stroke: none; }
.def-viz-panel[data-viz="scene"] .dvs-edge--facing { stroke: var(--accent); stroke-width: 3; }
.def-viz-panel[data-viz="scene"] .dvs-edge-head--facing { fill: var(--accent); }

/* world-model action INPUT: a small joystick fed (dashed) into the flow */
.def-viz-panel[data-viz="scene"] .dvs-feed { fill: none; stroke: var(--line-strong); stroke-width: 1.8; stroke-dasharray: 3 3; }
.def-viz-panel[data-viz="scene"] .dvs-feed-head { fill: var(--line-strong); stroke: none; }

/* labels */
.def-viz-panel[data-viz="scene"] .dvs-label { fill: var(--muted); font-size: 13px; }
.def-viz-panel[data-viz="scene"] .dvs-label--act { fill: var(--ink-soft); }
.def-viz-panel[data-viz="scene"] .dvs-label--wam { fill: var(--accent-ink); }

.def-viz-panel[data-viz="scene"] .dv-scene-caption {
  margin: var(--space-md) 0 0;
  color: var(--muted);
  font-size: var(--text-sm);
}

/* ===== Swiss Mono chrome: no frosted glass, so floating bars stay opaque ===== */
.side-nav { background: var(--surface); }
.toolbar,
.toolbar.is-stuck { background: var(--surface); }
.filter-panel { background: var(--surface); }

/* ===== mobile (phone) fixes ===== */
@media (max-width: 47.99rem) {
  /* toolbar: stop "Metadata" being shoved to the right of a wrapped line and give search its own row */
  .search-block { flex-basis: 100%; }
  .meta-updated { margin-left: 0; flex-basis: 100%; text-align: left; }
  /* paper card meta: drop the inline "·" so a wrapped chip doesn't start a line with a stray dot */
  .paper-meta { gap: 2px var(--space-sm); }
  .meta-chip + .meta-chip::before { content: ""; margin: 0; }
}