:root {
  --ink: #18201d;
  --muted: #5f6c67;
  --panel: #ffffff;
  --surface: #f4f7f6;
  --line: #d8e0dd;
  --line-strong: #aebdb7;
  --accent: #235f50;
  --accent-dark: #173f35;
  --accent-soft: #e9f4ef;
  --dfki-green: #6abfa2;
  --shadow: 0 8px 24px rgba(24, 32, 29, 0.07);
  --font-serif: Georgia, "Times New Roman", serif;
  --font-sans: "IBM Plex Sans", "Helvetica Neue", Arial, sans-serif;
  --font-mono: SFMono-Regular, Consolas, "Liberation Mono", monospace;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 5rem;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  color: var(--ink);
  background: #fff;
  font-family: var(--font-sans);
  line-height: 1.5;
}

button {
  font: inherit;
}

a {
  text-underline-offset: 0.18em;
}

a:focus-visible,
button:focus-visible {
  outline: 3px solid rgba(106, 191, 162, 0.45);
  outline-offset: 3px;
}

/* Paper navigation */
.paper-nav {
  position: sticky;
  top: 0;
  z-index: 50;
  border-top: 0.24rem solid var(--dfki-green);
  border-bottom: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.97);
  backdrop-filter: blur(10px);
}

.paper-nav-inner {
  display: grid;
  grid-template-columns: minmax(13rem, 1fr) auto minmax(3.5rem, 1fr);
  align-items: center;
  gap: 2rem;
  width: min(1280px, calc(100% - 3rem));
  min-height: 4.25rem;
  margin: 0 auto;
}

.paper-nav-brand {
  color: var(--ink);
  font: 700 0.92rem/1.2 var(--font-sans);
  letter-spacing: -0.015em;
  text-decoration: none;
  white-space: nowrap;
}

.paper-nav-links {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1.45rem;
}

.paper-nav-links a,
.paper-footer-links a {
  color: var(--muted);
  font: 650 0.78rem/1.2 var(--font-sans);
  text-decoration: none;
}

.paper-nav-links a:hover,
.paper-nav-links a:focus-visible,
.paper-footer-links a:hover,
.paper-footer-links a:focus-visible {
  color: var(--accent);
  text-decoration: underline;
}

.institution-mark {
  display: inline-flex;
  justify-self: end;
  align-items: center;
}

.institution-mark img {
  display: block;
  width: auto;
  height: 2.85rem;
}

/* Page header */
.hero {
  width: min(100%, 1280px);
  margin: 0 auto;
  padding: 2.2rem min(4vw, 3rem) 1.35rem;
}

.hero > div {
  max-width: 1040px;
  margin: 0 auto;
}

.layout {
  display: grid;
  gap: 3.5rem;
  width: min(100%, 1280px);
  margin: 0 auto;
  padding: 0 min(4vw, 3rem) 5rem;
}

.eyebrow {
  margin: 0 0 0.48rem;
  color: var(--accent);
  font: 700 0.72rem/1.2 var(--font-mono);
  letter-spacing: 0.11em;
  text-transform: uppercase;
}

.hero h1 {
  max-width: 1020px;
  margin: 0;
  font: 700 clamp(2.35rem, 5vw, 4.6rem)/1.02 var(--font-serif);
  letter-spacing: -0.035em;
  text-wrap: balance;
  text-align: left;
}

.lede,
.section-description,
.panel-description {
  color: var(--muted);
  font: 0.94rem/1.6 var(--font-sans);
  text-align: left;
}

.lede {
  max-width: 54rem;
  margin: 1.1rem 0 0;
}

.section-description,
.panel-description {
  max-width: 72rem;
  margin: 0.45rem 0 0;
}

/* Paper landing content */
.landing-hero {
  padding-top: clamp(4.5rem, 9vw, 7rem);
  padding-bottom: clamp(4.5rem, 8vw, 6.5rem);
}

.landing-hero-inner {
  width: 100%;
}

.paper-status {
  margin: 0 0 1.35rem;
  color: var(--accent);
  font: 700 0.76rem/1.35 var(--font-mono);
  letter-spacing: 0.09em;
  text-transform: uppercase;
}

.paper-authors {
  margin: 1.8rem 0 0.35rem;
  color: var(--ink);
  font: 700 clamp(1rem, 1.6vw, 1.15rem)/1.5 var(--font-sans);
}

.paper-affiliations {
  max-width: 50rem;
  margin: 0;
  color: var(--muted);
  font-size: 0.92rem;
  line-height: 1.65;
}

.hero-actions,
.citation-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem;
  margin-top: 1.75rem;
}

.hero-action {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 2.65rem;
  padding: 0.6rem 0.95rem;
  border: 1px solid var(--line-strong);
  border-radius: 0.28rem;
  background: #fff;
  color: var(--ink);
  font: 700 0.82rem/1.2 var(--font-sans);
  text-decoration: none;
  transition: border-color 140ms ease, background 140ms ease, color 140ms ease;
}

.hero-action:hover,
.hero-action:focus-visible {
  border-color: var(--accent);
  color: var(--accent);
}

.hero-action-primary {
  border-color: var(--accent-dark);
  background: var(--accent-dark);
  color: #fff;
}

.hero-action-primary:hover,
.hero-action-primary:focus-visible {
  border-color: var(--accent);
  background: var(--accent);
  color: #fff;
}

.landing-section {
  padding: clamp(2.5rem, 5vw, 4rem) 0 0;
  border-top: 1px solid var(--line);
}

.landing-section-header {
  max-width: 54rem;
  margin-bottom: 2rem;
}

.landing-section-header h2 {
  margin: 0;
  font: 700 clamp(1.75rem, 3vw, 2.4rem)/1.15 var(--font-serif);
  letter-spacing: -0.025em;
}

.landing-section-header p {
  margin: 0.8rem 0 0;
  color: var(--muted);
  line-height: 1.7;
}

.finding-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1.5rem;
}

.finding-card {
  padding: 1.4rem 0 0;
  border-top: 0.22rem solid var(--dfki-green);
}

.finding-value {
  display: block;
  margin-bottom: 0.75rem;
  color: var(--accent);
  font: 700 clamp(1.7rem, 3vw, 2.35rem)/1 var(--font-serif);
}

.finding-card h3 {
  margin: 0 0 0.45rem;
  font-size: 1rem;
}

.finding-card p {
  margin: 0;
  color: var(--muted);
  font-size: 0.9rem;
  line-height: 1.6;
}

.axis-links {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 0;
  margin-top: 2.25rem;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.axis-link {
  padding: 0.95rem 1rem;
  border-right: 1px solid var(--line);
  color: var(--ink);
  font-size: 0.84rem;
  font-weight: 700;
  text-decoration: none;
}

.axis-link:last-child {
  border-right: 0;
}

.axis-link:hover,
.axis-link:focus-visible {
  background: var(--accent-soft);
  color: var(--accent);
}

.citation-layout {
  display: grid;
  grid-template-columns: minmax(0, 0.85fr) minmax(24rem, 1.15fr);
  gap: 3rem;
  align-items: start;
}

.citation-text {
  margin: 0;
  color: var(--ink);
  line-height: 1.75;
}

.citation-actions {
  margin-top: 1.25rem;
}

.bibtex-block {
  margin: 0;
  padding: 1.2rem;
  overflow-x: auto;
  border: 1px solid var(--line);
  border-radius: 0.28rem;
  background: var(--surface);
  color: #27302d;
  font: 0.78rem/1.55 var(--font-mono);
}

/* Main layout */
.result-section {
  border: 1px solid var(--line);
  border-radius: 0.35rem;
  background: #fff;
  overflow: visible;
}

.section-heading {
  padding: 1.7rem 1.75rem 1.45rem;
  border-bottom: 1px solid var(--line);
}

.section-heading h2 {
  margin: 0;
  font: 700 clamp(1.45rem, 2.2vw, 1.9rem)/1.2 var(--font-serif);
  letter-spacing: -0.03em;
}

.qualitative-section .section-heading {
  border-bottom: 1px solid var(--line);
}

.quantitative-section {
  padding-bottom: 1.25rem;
}

.quantitative-layout {
  display: grid;
  grid-template-columns: minmax(12.5rem, 14.25rem) minmax(0, 1fr);
  gap: 1.25rem;
  align-items: start;
  padding: 1.25rem;
}

.quantitative-content {
  gap: 1.15rem;
}

.content-stack {
  display: grid;
  gap: 1.15rem;
  min-width: 0;
}

.global-sidebar {
  position: sticky;
  top: 5.6rem;
  z-index: 4;
  align-self: start;
}

.sidebar-card,
.panel {
  border: 1px solid var(--line);
  background: var(--panel);
}

.sidebar-card {
  display: grid;
  gap: 1rem;
  padding: 0.9rem;
  border-radius: 0.28rem;
}

.sidebar-title {
  margin: 0;
  color: var(--accent);
  font: 700 0.82rem/1.2 var(--font-mono);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.panel {
  overflow: hidden;
  border-radius: 0.28rem;
}

.panel-head {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 1.4rem;
  padding: 1.35rem 1.5rem 1.1rem;
  border-bottom: 1px solid var(--line);
}

.panel-head-stacked {
  display: grid;
  gap: 1rem;
  padding-bottom: 1rem;
}

.panel-title-row {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 1rem;
}

.panel h2 {
  margin: 0;
  font: 700 clamp(1.2rem, 1.8vw, 1.55rem)/1.2 var(--font-serif);
  letter-spacing: -0.025em;
}

.rq-number {
  margin-bottom: 0.25rem;
  font-size: clamp(1.04rem, 1.65vw, 1.36rem);
  letter-spacing: 0.08em;
}

/* Generic controls */
.control-block {
  display: grid;
  align-content: start;
  gap: 0.28rem;
  min-width: 0;
}

.control-label {
  color: var(--muted);
  font: 700 0.68rem/1.2 var(--font-mono);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.control-label-strong {
  font-size: 0.8rem;
  letter-spacing: 0.06em;
}

.sidebar-card .control-label {
  text-transform: none;
  letter-spacing: 0.03em;
}

.button-row {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-start;
  gap: 0.38rem;
}

.control-button {
  border: 1px solid var(--line);
  border-radius: 0.25rem;
  background: #fff;
  color: var(--ink);
  cursor: pointer;
  padding: 0.4rem 0.65rem;
  font: 700 0.78rem/1.1 var(--font-sans);
  transition: border-color 120ms, background 120ms, color 120ms;
}

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

.control-button.is-active {
  border-color: var(--accent-dark);
  background: var(--accent-dark);
  color: #fff;
}

.compact-row {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.35rem;
}

.compact-row .control-button,
.selection-grid-sidebar .control-button {
  width: 100%;
  min-width: 0;
  min-height: 1.95rem;
  padding: 0.32rem 0.45rem;
  font-size: 0.72rem;
  line-height: 1.15;
  text-align: center;
}

.selection-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 0.42rem;
}

.selection-grid-sidebar {
  grid-template-columns: 1fr;
  gap: 0.28rem;
}

#shared-selection-controls .control-button:nth-child(2),
#shared-selection-controls .control-button:nth-child(3),
#shared-selection-controls .control-button:nth-child(6) {
  margin-top: 0.9rem;
}

/* RQ1, RQ3, RQ4 compact local controls */
.filter-grid-compact {
  display: grid;
  grid-template-columns: minmax(0, 1fr) max-content minmax(1rem, 1fr) max-content minmax(0, 1fr);
  align-items: start;
  gap: 0;
  width: 100%;
  padding: 0.75rem 1.5rem 0;
}

#rq1 .filter-grid-compact .filter-panel {
  grid-column: 4;
}

#rq3 .filter-grid-compact .filter-panel:nth-child(1),
#rq4 .filter-grid-compact .filter-panel:nth-child(1) {
  grid-column: 2;
}

#rq3 .filter-grid-compact .filter-panel:nth-child(2),
#rq4 .filter-grid-compact .filter-panel:nth-child(2) {
  grid-column: 4;
}

.filter-grid-compact .filter-panel {
  width: max-content;
  max-width: none;
}

fieldset {
  margin: 0;
  border: 1px solid var(--line);
  border-radius: 0.28rem;
  padding: 0.85rem;
  background: var(--surface);
}

legend {
  padding: 0 0.35rem;
  color: var(--accent);
  font: 700 0.78rem/1.2 var(--font-mono);
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.equal-button-row {
  display: grid;
  gap: 0.28rem;
}

.annotation-panel .equal-button-row {
  grid-template-columns: repeat(3, 5.2rem);
}

.metric-panel .equal-button-row {
  grid-template-columns: repeat(3, 5.8rem);
}

#rq4-metric-controls.equal-button-row {
  grid-template-columns: repeat(2, 5.8rem);
}

.equal-button-row .control-button {
  width: 100%;
  min-width: 0;
  min-height: 1.75rem;
  padding: 0.24rem 0.4rem;
  font-size: 0.68rem;
  text-align: center;
}

/* Charts */
.chart-wrap {
  overflow-x: auto;
  padding: 1rem;
}

.chart-wrap > * {
  width: 100%;
  max-width: 1140px;
  margin: 0 auto;
}

.scatter-shell,
.single-plot {
  display: grid;
  gap: 0.45rem;
  max-width: 1000px;
  margin: 0 auto;
}

.single-plot-rq1,
.single-plot-composite {
  max-width: none;
  width: 100%;
  margin: 0 auto;
}

.scatter-shell svg,
.single-plot svg {
  display: block;
  width: 100%;
  max-width: none;
  height: auto;
  font-family: var(--font-sans);
}

.single-plot-rq1 .colorbar-shell,
.single-plot-composite .colorbar-shell {
  width: min(100%, 58rem);
  margin: 0 auto;
}

.colorbar-shell {
  display: grid;
  gap: 0.3rem;
}

.colorbar-track {
  height: 0.82rem;
  border: 1px solid rgba(23, 33, 43, 0.18);
  border-radius: 999px;
  background: linear-gradient(90deg, #2166ac 0, #67a9cf 18%, #d1e5f0 36%, #f7f7f7 50%, #fddbc7 64%, #ef8a62 82%, #b2182b 100%);
}

.colorbar-labels {
  display: flex;
  justify-content: space-between;
  color: var(--muted);
  font: 700 0.78rem/1.2 var(--font-mono);
}

/* RQ2 interactive legend */
.rq2-interactive-legend {
  display: grid;
  grid-template-columns: minmax(0, 1fr) max-content minmax(1rem, 1fr) max-content minmax(0, 1fr);
  align-items: start;
  width: 100%;
  gap: 0;
  margin: 0.25rem 0 1.05rem;
}

.rq2-interactive-legend .dataset-legend-group {
  grid-column: 2;
}

.rq2-interactive-legend .regime-legend-group {
  grid-column: 4;
}

.rq2-filter-legend {
  width: max-content;
  max-width: none;
  padding: 0.7rem 0.78rem 0.76rem;
  border: 1px solid var(--line);
  border-radius: 0.28rem;
  background: var(--surface);
  font-family: var(--font-sans);
}

.rq2-filter-legend .legend-title {
  margin: 0 0 0.5rem;
  color: var(--muted);
  font: 800 0.68rem/1.2 var(--font-mono);
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.legend-filter-chip {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.34rem;
  min-height: 1.75rem;
  padding: 0.24rem 0.52rem;
  border: 1px solid var(--line-strong);
  border-radius: 0.25rem;
  background: #fff;
  color: var(--ink);
  cursor: pointer;
  font: 700 0.72rem/1 var(--font-sans);
  transition: opacity 0.15s ease, background 0.15s ease, border-color 0.15s ease;
}

.legend-filter-chip:hover {
  opacity: 1;
  border-color: var(--accent);
}

.legend-filter-chip.is-active {
  opacity: 1;
  border-color: var(--line-strong);
  background: #fff;
}

.legend-filter-chip.is-inactive {
  opacity: 0.42;
  border-color: var(--line);
  background: var(--surface);
}

.dataset-legend-table {
  display: grid;
  gap: 0.36rem;
}

.dataset-legend-row {
  display: grid;
  grid-template-columns: 5.25rem max-content;
  align-items: center;
  column-gap: 0.48rem;
}

.dataset-legend-family {
  color: var(--muted);
  font: 800 0.72rem/1.15 var(--font-sans);
  text-align: right;
}

.dataset-legend-values {
  display: grid;
  grid-template-columns: repeat(3, 3.45rem);
  gap: 0.32rem;
}

.dataset-legend-row:first-child .dataset-legend-values {
  grid-template-columns: 3.45rem;
}

.dataset-legend-item {
  width: 100%;
}

.dataset-legend-item .legend-swatch {
  width: 0.72rem;
  height: 0.72rem;
  border: 1px solid rgba(23, 31, 42, 0.2);
  border-radius: 0.2rem;
  flex: 0 0 auto;
}

.regime-legend-list {
  display: grid;
  grid-template-columns: repeat(2, 8.2rem);
  gap: 0.36rem;
}

.regime-legend-item {
  justify-content: flex-start;
  width: 100%;
  min-height: 1.95rem;
  padding: 0.24rem 0.55rem;
  text-align: left;
}

.legend-marker-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 1.22rem;
  height: 1.22rem;
  flex: 0 0 auto;
}

.legend-marker-icon svg {
  display: block;
  width: 100%;
  height: 100%;
}

.legend-group {
  display: grid;
  gap: 0.35rem;
}

.legend-swatch {
  width: 0.82rem;
  height: 0.82rem;
  border: 1px solid rgba(23, 33, 43, 0.28);
  border-radius: 999px;
  flex: 0 0 auto;
}

/* Tooltip and messages */
.tooltip {
  position: fixed;
  z-index: 20;
  max-width: 24rem;
  pointer-events: none;
  border: 1px solid rgba(23, 33, 43, 0.18);
  border-radius: 0.28rem;
  padding: 0.72rem 0.84rem;
  background: rgba(255, 255, 255, 0.97);
  box-shadow: var(--shadow);
  font: 0.8rem/1.35 var(--font-sans);
}

.empty {
  margin: 0;
  color: var(--muted);
  font: 700 0.9rem/1.4 var(--font-sans);
}

/* Responsive */
@media (max-width: 1100px) {
  .paper-nav-inner {
    grid-template-columns: 1fr auto;
    gap: 0.75rem 1.5rem;
    padding: 0.65rem 0;
  }

  .paper-nav-links {
    grid-column: 1 / -1;
    grid-row: 2;
    justify-content: flex-start;
    gap: 0.75rem 1.35rem;
    overflow-x: auto;
    padding-bottom: 0.15rem;
  }

  .hero,
  .layout {
    padding-left: min(5vw, 4rem);
    padding-right: min(5vw, 4rem);
  }

  .quantitative-layout {
    grid-template-columns: 1fr;
  }

  .global-sidebar {
    position: static;
  }

  .sidebar-card {
    grid-template-columns: minmax(8rem, 0.65fr) minmax(0, 1.35fr);
    align-items: start;
  }

  .sidebar-title {
    grid-column: 1 / -1;
  }

  .selection-grid-sidebar,
  .compact-row {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  #shared-selection-controls .control-button:nth-child(2),
  #shared-selection-controls .control-button:nth-child(3),
  #shared-selection-controls .control-button:nth-child(6) {
    margin-top: 0;
  }

  .panel-head {
    flex-direction: column;
  }
}

@media (max-width: 900px) {
  .finding-grid,
  .citation-layout {
    grid-template-columns: 1fr;
  }

  .axis-links {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .axis-link:nth-child(2) {
    border-right: 0;
  }

  .axis-link:nth-child(-n + 2) {
    border-bottom: 1px solid var(--line);
  }

  .filter-grid-compact,
  .rq2-interactive-legend {
    grid-template-columns: 1fr;
    gap: 0.65rem;
  }

  #rq1 .filter-grid-compact .filter-panel,
  #rq3 .filter-grid-compact .filter-panel:nth-child(1),
  #rq3 .filter-grid-compact .filter-panel:nth-child(2),
  #rq4 .filter-grid-compact .filter-panel:nth-child(1),
  #rq4 .filter-grid-compact .filter-panel:nth-child(2),
  .rq2-interactive-legend .dataset-legend-group,
  .rq2-interactive-legend .regime-legend-group {
    grid-column: 1;
  }

  .filter-grid-compact .filter-panel,
  .rq2-filter-legend {
    width: 100%;
  }

  .annotation-panel .equal-button-row,
  .metric-panel .equal-button-row,
  #rq4-metric-controls.equal-button-row,
  .regime-legend-list,
  .dataset-legend-values,
  .dataset-legend-row:first-child .dataset-legend-values {
    grid-template-columns: 1fr;
  }

  .dataset-legend-row {
    grid-template-columns: 1fr;
    gap: 0.22rem;
  }

  .dataset-legend-family {
    text-align: left;
  }
}

@media (max-width: 720px) {
  .paper-nav-inner {
    width: min(100% - 2rem, 1280px);
  }

  .paper-nav-brand {
    max-width: 14rem;
    white-space: normal;
  }

  .paper-nav-links a:nth-child(3),
  .paper-nav-links a:nth-child(4) {
    display: none;
  }

  .institution-mark img {
    height: 2.45rem;
  }

  .hero {
    padding-top: 3.25rem;
  }

  .layout {
    gap: 2.75rem;
    padding-bottom: 2.4rem;
  }

  .landing-hero h1 {
    font-size: clamp(2.2rem, 12vw, 3.2rem);
  }

  .hero-actions,
  .hero-action {
    width: 100%;
  }

  .axis-links {
    grid-template-columns: 1fr;
  }

  .axis-link,
  .axis-link:nth-child(2) {
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }

  .axis-link:last-child {
    border-bottom: 0;
  }

  .chart-wrap,
  .panel-head {
    padding-left: 1rem;
    padding-right: 1rem;
  }

  .sidebar-card,
  .selection-grid-sidebar,
  .compact-row {
    grid-template-columns: 1fr;
  }

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

  .control-button {
    font-size: 0.8rem;
  }
}

.chart-crossfade-frame {
  position: relative;
  width: 100%;
  overflow: hidden;
}

.chart-crossfade-layer {
  position: absolute;
  inset: 0;
  width: 100%;
}

.visfis-note {
  display: block;
  margin: 0.35rem 0 0;
  padding: 0.6rem 0.7rem;
  border: 1px solid var(--line);
  border-left: 0.22rem solid var(--dfki-green);
  border-radius: 0.25rem;
  background: var(--accent-soft);
  color: var(--muted);
  font: 0.72rem/1.35 var(--font-sans);
}
/* Dataset section */
.section-body {
  padding: 1rem 1.5rem 1.35rem;
}
/* Dataset browser */

.dataset-browser {
  display: grid;
  gap: 1rem;
}

.dataset-browser-controls {
  display: grid;
  gap: 0.85rem;
}

.dataset-browser-controls .control-block {
  display: grid;
  gap: 0.38rem;
}

#dataset-regime-controls {
  display: grid;
  grid-template-columns: repeat(4, 8.2rem);
  gap: 0.42rem;
  justify-content: start;
  max-width: none;
}

.dataset-class-row {
  display: grid;
  grid-template-columns: repeat(5, 10.2rem);
  gap: 0.42rem;
  justify-content: start;
}

#dataset-regime-controls .control-button,
.dataset-class-row .control-button {
  width: 100%;
  min-height: 2.05rem;
  padding: 0.36rem 0.65rem;
  justify-content: center;
  text-align: center;
  font-size: 0.74rem;
}

.dataset-regime-description {
  padding: 0.82rem 1rem;
  border: 1px solid var(--line);
  border-left: 0.22rem solid var(--dfki-green);
  border-radius: 0.25rem;
  background: var(--accent-soft);
  color: var(--muted);
  font: 0.9rem/1.45 var(--font-sans);
}

.dataset-regime-description strong {
  color: var(--ink);
}

.dataset-example-columns {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.9rem;
}

.dataset-example-panel {
  display: grid;
  gap: 0.75rem;
  min-width: 0;
  padding: 0.95rem;
  border: 1px solid var(--line);
  border-radius: 0.28rem;
  background: var(--surface);
}

.dataset-example-panel h3 {
  margin: 0;
  font-size: 1rem;
  line-height: 1.2;
  letter-spacing: -0.02em;
}

.dataset-image-grid {
  display: grid;
  grid-template-columns: repeat(3, 9.2rem);
  justify-content: center;
  gap: 0.75rem;
}

.dataset-example-card {
  display: grid;
  gap: 0.28rem;
  margin: 0;
}

.dataset-example-card img {
  display: block;
  width: 9.2rem;
  height: 9.2rem;
  object-fit: cover;
  border-radius: 0.18rem;
  border: 1px solid var(--line);
  background: var(--surface);
}

.dataset-example-card figcaption {
  color: var(--muted);
  font: 0.7rem/1.2 var(--font-sans);
  text-align: center;
}

.dataset-empty {
  grid-column: 1 / -1;
  min-height: 19rem;
  display: grid;
  place-items: center;
  margin: 0;
  padding: 1rem;
  border: 1px dashed rgba(183, 193, 205, 0.9);
  border-radius: 0.25rem;
  background: var(--surface);
  color: var(--muted);
  font: 700 0.86rem/1.35 var(--font-sans);
  text-align: center;
}

@media (max-width: 1100px) {
  #dataset-regime-controls {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .dataset-class-row {
    grid-template-columns: repeat(5, minmax(0, 1fr));
  }

  .dataset-image-grid {
    grid-template-columns: repeat(3, minmax(0, 8rem));
  }

  .dataset-example-card img {
    width: 8rem;
    height: 8rem;
  }
}

@media (max-width: 800px) {
  .dataset-example-columns {
    grid-template-columns: 1fr;
  }

  #dataset-regime-controls,
  .dataset-class-row {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

/* Qualitative browser */

.qualitative-browser {
  display: grid;
  gap: 1rem;
}

.qualitative-meta {
  display: grid;
  gap: 0.35rem;
  padding: 0.82rem 1rem;
  border: 1px solid var(--line);
  border-left: 0.22rem solid var(--dfki-green);
  border-radius: 0.25rem;
  background: var(--accent-soft);
  color: var(--muted);
  font: 0.9rem/1.45 var(--font-sans);
}

.qualitative-meta div {
  display: flex;
  flex-wrap: wrap;
  gap: 0.85rem;
}

.qualitative-meta strong {
  color: var(--ink);
}

.qualitative-controls {
  display: grid;
  grid-template-columns: minmax(0, 1.22fr) minmax(25rem, 0.78fr);
  gap: 1rem;
  align-items: start;
}

.qual-control-card {
  display: grid;
  gap: 0.95rem;
  padding: 1rem;
  border: 1px solid var(--line);
  border-radius: 0.28rem;
  background: var(--surface);
}

.qual-control-card h3 {
  margin: 0;
  font-size: 1rem;
  line-height: 1.2;
  letter-spacing: -0.02em;
}

.qual-mode-panel {
  display: grid;
  gap: 0.9rem;
  padding-top: 0.15rem;
}

.control-hint {
  margin: -0.2rem 0 0;
  color: var(--muted);
  font: 0.72rem/1.3 var(--font-sans);
}

.qualitative-controls .control-block {
  display: grid;
  gap: 0.35rem;
}

.qualitative-controls .button-row {
  gap: 0.42rem;
}

.qual-three-column-row {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.qual-four-column-row {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.qualitative-controls .control-button {
  width: 100%;
  min-width: 0;
  min-height: 2.05rem;
  padding: 0.36rem 0.55rem;
  justify-content: center;
  text-align: center;
  font-size: 0.74rem;
  line-height: 1.15;
}

.qualitative-controls .control-button.is-inactive {
  opacity: 0.48;
}

.qualitative-controls [hidden] {
  display: none !important;
}

@media (max-width: 1150px) {
  .qualitative-controls {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 850px) {
  .qual-four-column-row {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .qual-three-column-row {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

.qual-class-row {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
}

.qual-case-row {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.qual-example-card .control-label {
  margin-bottom: 0.05rem;
}

@media (max-width: 850px) {
  .qual-class-row {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .qual-case-row {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 600px) {
  .qual-class-row {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

.qual-example-top-grid {
  display: grid;
  grid-template-columns: minmax(10rem, 0.45fr) minmax(0, 1.55fr);
  gap: 1rem;
  align-items: start;
}

.qual-model-row {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.42rem;
}

.qual-dataset-matrix {
  display: grid;
  gap: 0.42rem;
  justify-content: end;
}

.qual-dataset-family-label {
  color: var(--muted);
  font: 800 0.72rem/1.2 var(--font-sans);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.qual-dataset-family-values {
  display: grid;
  gap: 0.42rem;
}

@media (max-width: 900px) {
  .qual-example-top-grid {
    grid-template-columns: 1fr;
  }
}

.qual-dataset-matrix-row {
  display: grid;
  grid-template-columns: 6.6rem max-content;
  gap: 0.5rem;
  align-items: center;
}

.qual-dataset-family-values-3 {
  grid-template-columns: repeat(3, 5.6rem);
}

.qual-dataset-family-values-1 {
  grid-template-columns: 5.6rem;
  max-width: none;
}

.segmented-switch {
  position: relative;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  padding: 0.18rem;
  border: 1px solid var(--line);
  border-radius: 0.28rem;
  background: #fff;
  overflow: hidden;
}

.segmented-switch::before {
  content: "";
  position: absolute;
  top: 0.18rem;
  left: 0.18rem;
  width: calc(50% - 0.18rem);
  height: calc(100% - 0.36rem);
  border-radius: 0.18rem;
  background: var(--accent-dark);
  transform: translateX(0);
  transition: transform 220ms ease;
  z-index: 0;
}

.segmented-switch:has(.control-button:nth-child(2).is-active)::before {
  transform: translateX(100%);
}

.segmented-switch .control-button {
  position: relative;
  z-index: 1;
  min-height: 2rem;
  border: 0;
  border-radius: 0.18rem;
  background: transparent;
  box-shadow: none;
  color: var(--muted);
  transition: color 180ms ease;
}

.segmented-switch .control-button.is-active {
  background: transparent;
  color: white;
  box-shadow: none;
}

.segmented-switch .control-button:not(.is-active):hover {
  background: transparent;
  color: var(--ink);
}

/* Qualitative explanation grid */

.qualitative-grid-wrap {
  grid-column: 1 / -1;
  width: 100%;
  max-width: 100%;
  overflow-x: auto;
  padding: 1rem 0 0.25rem;
}

.qual-grid {
  --qual-tile-size: 8.25rem;
  --qual-row-label-width: 5.5rem;
  --qual-gap: 0.55rem;

  display: grid;
  grid-template-columns:
    var(--qual-row-label-width)
    repeat(var(--qual-cols), var(--qual-tile-size));
  gap: var(--qual-gap);
  align-items: start;
  width: max-content;
  min-width: 0;
  margin: 0;
}

.qual-grid-corner {
  width: var(--qual-row-label-width);
  height: 1.9rem;
  min-height: 1.9rem;
}

.qual-grid-head {
  width: var(--qual-tile-size);
  height: 1.9rem;
  min-height: 1.9rem;
  display: flex;
  align-items: end;
  justify-content: center;
  text-align: center;
  color: var(--ink);
  font: 800 0.82rem/1.15 var(--font-sans);
}

.qual-grid-row-label {
  width: var(--qual-row-label-width);
  height: var(--qual-tile-size);
  min-height: var(--qual-tile-size);
  display: flex;
  align-items: center;
  justify-content: flex-end;
  padding-right: 0.4rem;
  white-space: nowrap;
  color: var(--muted);
  font: 800 0.78rem/1.15 var(--font-sans);
  text-align: right;
}

.qual-tile {
  width: var(--qual-tile-size);
  height: var(--qual-tile-size);
  min-width: var(--qual-tile-size);
  min-height: var(--qual-tile-size);
  border: 1px solid var(--line);
  border-radius: 0.2rem;
  overflow: hidden;
  background: #fff;
}

.qual-placeholder {
  display: grid;
  place-items: center;
  border-style: dashed;
  background: var(--surface);
  color: var(--muted);
  font: 800 0.74rem/1.25 var(--font-sans);
  text-align: center;
  padding: 0.7rem;
}

.qual-tile img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.qual-comparison-shell {
  --qual-tile-size: clamp(6.7rem, 9vw, 8.25rem);
  --qual-input-size: clamp(8.25rem, 15vw, 13.5rem);
  --qual-row-label-width: 5.5rem;
  --qual-gap: 0.55rem;
  --qual-header-height: 1.9rem;

  display: grid;
  grid-template-columns: var(--qual-input-size) max-content;
  gap: var(--qual-gap);
  align-items: start;
  width: max-content;
  max-width: none;
  margin: 0;
}

.qual-input-column {
  display: grid;
  grid-template-rows:
    var(--qual-header-height)
    calc(
      var(--qual-rows, 6) * var(--qual-tile-size)
      + (var(--qual-rows, 6) - 1) * var(--qual-gap)
    );
  gap: var(--qual-gap);
  width: var(--qual-input-size);
}

.qual-input-head {
  width: var(--qual-input-size);
}

.qual-input-cell {
  width: var(--qual-input-size);
  height: 100%;
  display: grid;
  place-items: center;
  padding: 0;
  border: none;
  border-radius: 0;
  background: transparent;
  overflow: hidden;
}

.qual-input-cell img {
  display: block;
  width: min(100%, var(--qual-input-size));
  max-height: 100%;
  object-fit: contain;
  border-radius: 0.2rem;
  border: 1px solid var(--line);
  background: #fff;
}

.qual-input-cell span {
  color: var(--muted);
  font: 800 0.74rem/1.25 var(--font-sans);
}

.qual-example-placeholder-button {
  visibility: hidden;
  pointer-events: none;
}

.qual-no-example-message {
  grid-column: 1 / -1;
  margin: 0;
  min-height: 2.05rem;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--muted);
  font: 700 0.78rem/1.25 var(--font-sans);
  border: 1px dashed rgba(183, 193, 205, 0.85);
  border-radius: 0.25rem;
  background: var(--surface);
  text-align: center;
}

#qual-example-controls {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 0.42rem;
}

.qual-empty-shell {
  --qual-tile-size: clamp(6.7rem, 9vw, 8.25rem);
  --qual-input-size: clamp(8.25rem, 15vw, 13.5rem);
  --qual-row-label-width: 5.5rem;
  --qual-gap: 0.55rem;
  --qual-header-height: 1.9rem;

  display: block;
  width: min(
    100%,
    calc(
      var(--qual-input-size)
      + var(--qual-gap)
      + var(--qual-row-label-width)
      + 4 * var(--qual-tile-size)
      + 4 * var(--qual-gap)
    )
  );
  min-height: calc(
    var(--qual-header-height)
    + var(--qual-gap)
    + 6 * var(--qual-tile-size)
    + 5 * var(--qual-gap)
  );
}

.qual-empty-panel {
  min-height: inherit;
  display: grid;
  place-items: center;
  align-content: center;
  gap: 0.35rem;
  padding: 1.5rem;
  border: 1px dashed rgba(183, 193, 205, 0.95);
  border-radius: 0.28rem;
  background: var(--surface);
  color: var(--muted);
  text-align: center;
  font-family: var(--font-sans);
}

.qual-empty-panel strong {
  color: var(--ink);
  font-size: 0.98rem;
  line-height: 1.2;
}

.qual-empty-panel span {
  max-width: 28rem;
  font-size: 0.8rem;
  line-height: 1.35;
}

/* Institutional footer */
.paper-footer {
  border-top: 0.24rem solid var(--dfki-green);
  background: var(--accent-dark);
  color: rgba(255, 255, 255, 0.74);
}

.paper-footer-inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: end;
  gap: 3rem;
  width: min(1280px, calc(100% - 3rem));
  margin: 0 auto;
  padding: 2.4rem 0;
}

.paper-footer-brand {
  display: flex;
  align-items: center;
  gap: 1.35rem;
}

.institution-mark-footer {
  justify-self: start;
  padding-right: 1.35rem;
  border-right: 1px solid rgba(255, 255, 255, 0.22);
}

.institution-mark-footer img {
  height: 3.25rem;
}

.paper-footer p {
  margin: 0;
  font-size: 0.82rem;
}

.paper-footer-meta {
  display: grid;
  justify-items: end;
  gap: 0.7rem;
  text-align: right;
}

.paper-footer-links {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 0.65rem 1.25rem;
}

.paper-footer-links a {
  color: rgba(255, 255, 255, 0.78);
}

.paper-footer-links a:hover,
.paper-footer-links a:focus-visible {
  color: #fff;
}

@media (max-width: 800px) {
  .paper-footer-inner {
    grid-template-columns: 1fr;
    gap: 1.75rem;
    width: min(100% - 2rem, 1280px);
  }

  .paper-footer-brand {
    align-items: flex-start;
    flex-direction: column;
  }

  .institution-mark-footer {
    padding: 0;
    border: 0;
  }

  .paper-footer-meta {
    justify-items: start;
    text-align: left;
  }

  .paper-footer-links {
    justify-content: flex-start;
  }
}

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

  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
  }
}