:root {
  color-scheme: dark;
  --ink: #f4f7f2;
  --muted: #a9b8b2;
  --dim: #768781;
  --page: #071310;
  --panel: #0d1c18;
  --panel-2: #11241e;
  --line: #263b34;
  --line-bright: #3b574d;
  --mint: #61e4c5;
  --mint-deep: #32b99b;
  --lime: #c9ff65;
  --warm: #ffd67a;
  --danger: #ffb69f;
  --radius: 22px;
  --max-width: 1240px;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-synthesis: none;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  min-width: 320px;
  margin: 0;
  background:
    radial-gradient(circle at 72% 5%, rgba(97, 228, 197, 0.11), transparent 28rem),
    var(--page);
  color: var(--ink);
  line-height: 1.6;
}

a {
  color: inherit;
  text-decoration-thickness: 1px;
  text-underline-offset: 4px;
}

button,
select {
  font: inherit;
}

button,
a,
select {
  -webkit-tap-highlight-color: transparent;
}

:focus-visible {
  outline: 3px solid var(--lime);
  outline-offset: 3px;
}

.skip-link {
  position: fixed;
  z-index: 100;
  top: 0.5rem;
  left: 0.75rem;
  padding: 0.65rem 0.9rem;
  transform: translateY(-160%);
  border-radius: 8px;
  background: var(--lime);
  color: #071310;
  font-weight: 800;
}

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

.status-bar {
  position: sticky;
  z-index: 20;
  top: 0;
  display: flex;
  min-height: 34px;
  align-items: center;
  justify-content: center;
  gap: 0.55rem;
  padding: 0.36rem 1rem;
  border-bottom: 1px solid rgba(255, 214, 122, 0.35);
  background: #332a18;
  color: #ffe8ad;
  font-size: 0.76rem;
  font-weight: 800;
  letter-spacing: 0.055em;
  text-align: center;
  text-transform: uppercase;
}

.status-dot {
  width: 0.48rem;
  height: 0.48rem;
  flex: none;
  border-radius: 50%;
  background: var(--warm);
  box-shadow: 0 0 0 4px rgba(255, 214, 122, 0.12);
}

.site-header {
  display: flex;
  width: min(calc(100% - 2.5rem), var(--max-width));
  min-height: 78px;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
  margin: 0 auto;
  border-bottom: 1px solid rgba(59, 87, 77, 0.62);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  color: var(--ink);
  font-size: 0.88rem;
  letter-spacing: 0.04em;
  text-decoration: none;
  text-transform: uppercase;
}

.brand strong {
  color: var(--mint);
  font-weight: 750;
}

.brand-mark {
  width: 33px;
  overflow: visible;
}

.brand-mark path {
  fill: none;
  stroke: var(--mint);
  stroke-width: 1.8;
}

.brand-mark circle {
  fill: var(--lime);
}

.site-header nav {
  display: flex;
  gap: clamp(1rem, 3vw, 2rem);
}

.site-header nav a {
  color: var(--muted);
  font-size: 0.86rem;
  font-weight: 650;
  text-decoration: none;
}

.site-header nav a:hover {
  color: var(--mint);
}

.hero {
  display: grid;
  width: min(calc(100% - 2.5rem), var(--max-width));
  min-height: 630px;
  align-items: center;
  grid-template-columns: minmax(0, 1.05fr) minmax(360px, 0.95fr);
  gap: 3rem;
  margin: 0 auto;
  padding: 4.75rem 0 5rem;
}

.eyebrow {
  margin: 0 0 1rem;
  color: var(--mint);
  font-size: 0.77rem;
  font-weight: 800;
  letter-spacing: 0.13em;
  text-transform: uppercase;
}

.eyebrow span {
  display: inline-block;
  margin-right: 0.3rem;
  padding: 0.23rem 0.48rem;
  border: 1px solid rgba(97, 228, 197, 0.38);
  border-radius: 4px;
  background: rgba(97, 228, 197, 0.08);
}

h1,
h2,
h3,
p {
  text-wrap: pretty;
}

h1 {
  max-width: 780px;
  margin: 0;
  font-size: clamp(3.2rem, 6.7vw, 6rem);
  font-weight: 620;
  letter-spacing: -0.065em;
  line-height: 0.93;
}

.hero-lede {
  max-width: 670px;
  margin: 1.75rem 0 0;
  color: #c3cec9;
  font-size: clamp(1.08rem, 2vw, 1.3rem);
  line-height: 1.55;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem;
  margin-top: 2rem;
}

.button {
  display: inline-flex;
  min-height: 48px;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.7rem 1.15rem;
  border: 1px solid transparent;
  border-radius: 9px;
  font-size: 0.9rem;
  font-weight: 800;
  text-decoration: none;
}

.button-primary {
  background: var(--lime);
  color: #071310;
}

.button-primary:hover {
  background: #d9ff92;
}

.button-secondary {
  border-color: var(--line-bright);
  background: rgba(17, 36, 30, 0.78);
  color: var(--ink);
}

.button-secondary:hover {
  border-color: var(--mint);
}

.hero-caveat {
  max-width: 650px;
  margin: 1.25rem 0 0;
  padding-left: 0.9rem;
  border-left: 2px solid var(--warm);
  color: #bbc5c1;
  font-size: 0.82rem;
}

.hero-visual svg {
  display: block;
  width: 100%;
  max-width: 560px;
  margin: 0 auto;
}

.hero-visual .glow {
  opacity: 0.11;
}

.orbit-lines ellipse {
  fill: none;
  stroke: rgba(97, 228, 197, 0.16);
  stroke-dasharray: 3 8;
  stroke-width: 1.2;
}

.molecule-lines path {
  fill: none;
  stroke: rgba(244, 247, 242, 0.74);
  stroke-width: 1.7;
}

.data-pills rect {
  fill: rgba(17, 36, 30, 0.84);
  stroke: var(--line-bright);
}

.data-labels {
  fill: var(--muted);
  font-size: 11px;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-anchor: middle;
}

.qm9-section {
  width: min(calc(100% - 2.5rem), var(--max-width));
  margin: 0 auto;
  padding: 5.5rem 0;
  border-top: 1px solid var(--line);
  scroll-margin-top: 48px;
}

.result-stamp {
  display: flex;
  align-items: center;
  gap: 0.7rem;
  color: var(--mint);
  font-size: 0.72rem;
  font-weight: 750;
  letter-spacing: 0.055em;
  text-align: right;
  text-transform: uppercase;
}

.result-stamp span {
  flex: none;
  padding: 0.28rem 0.46rem;
  border: 1px solid currentColor;
  border-radius: 4px;
}

.qm9-lede {
  max-width: 880px;
  margin: -0.45rem 0 1.75rem;
  color: #c3cec9;
  font-size: 1rem;
}

.cohort-toggle {
  display: inline-flex;
  gap: 4px;
  margin-bottom: 0.85rem;
  padding: 4px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: #07130f;
}

.cohort-toggle button {
  min-height: 39px;
  padding: 0.45rem 0.85rem;
  border: 0;
  border-radius: 7px;
  background: transparent;
  color: var(--muted);
  cursor: pointer;
  font-size: 0.74rem;
  font-weight: 750;
}

.cohort-toggle button[aria-pressed="true"] {
  background: var(--panel-2);
  color: var(--mint);
  box-shadow: inset 0 0 0 1px var(--line-bright);
}

.cohort-toggle button:disabled {
  cursor: wait;
  opacity: 0.65;
}

.qm9-results-panel {
  min-width: 0;
  padding: clamp(1rem, 3vw, 2rem);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background:
    radial-gradient(circle at 8% 0, rgba(97, 228, 197, 0.08), transparent 28rem),
    var(--panel);
  box-shadow: 0 32px 90px rgba(0, 0, 0, 0.2);
}

.qm9-metric-grid {
  display: grid;
  gap: 0.75rem;
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.qm9-metric-card {
  min-width: 0;
  padding: 1.05rem;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: #091712;
}

.qm9-metric-card span,
.qm9-metric-card small {
  display: block;
  overflow: hidden;
  color: var(--muted);
  font-size: 0.64rem;
  letter-spacing: 0.04em;
  text-overflow: ellipsis;
  text-transform: uppercase;
  white-space: nowrap;
}

.qm9-metric-card strong {
  display: block;
  margin: 0.14rem 0 0.05rem;
  font-size: clamp(1.55rem, 3.2vw, 2.25rem);
  font-variant-numeric: tabular-nums;
  font-weight: 590;
  letter-spacing: -0.045em;
}

.qm9-metric-card.primary {
  border-color: rgba(97, 228, 197, 0.33);
  background: rgba(97, 228, 197, 0.065);
}

.qm9-metric-card.primary strong,
.qm9-metric-card.accent strong {
  color: var(--mint);
}

.qm9-metric-card.accent {
  border-color: rgba(201, 255, 101, 0.28);
  background: rgba(201, 255, 101, 0.045);
}

.qm9-detail-grid {
  display: grid;
  gap: 0.75rem;
  margin-top: 0.75rem;
  grid-template-columns: minmax(0, 1.35fr) minmax(260px, 0.65fr);
}

.qm9-chart-card,
.qm9-claim-boundary {
  margin: 0;
  padding: 1.15rem;
  border: 1px solid var(--line);
  border-radius: 13px;
  background: #091712;
}

.qm9-chart-card figcaption {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 1rem;
}

.qm9-chart-card figcaption strong {
  font-size: 0.9rem;
}

.qm9-chart-card figcaption span {
  color: var(--muted);
  font-size: 0.68rem;
}

.qm9-bars {
  display: grid;
  gap: 1.1rem;
}

.qm9-bar-header,
.qm9-bar-row {
  display: grid;
  align-items: center;
  gap: 0.65rem;
  grid-template-columns: 3.3rem minmax(100px, 1fr) 4.8rem;
}

.qm9-bar-header {
  margin-bottom: 0.3rem;
}

.qm9-bar-header strong {
  color: var(--ink);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
}

.qm9-bar-header span {
  grid-column: 2 / 4;
  color: var(--lime);
  font-size: 0.68rem;
  font-weight: 750;
  text-align: right;
}

.qm9-bar-row + .qm9-bar-row {
  margin-top: 0.28rem;
}

.qm9-bar-row > span:first-child {
  color: var(--muted);
  font-size: 0.66rem;
}

.qm9-bar-row > strong {
  font-size: 0.7rem;
  font-variant-numeric: tabular-nums;
  text-align: right;
}

.qm9-bar-track {
  display: block;
  height: 8px;
  overflow: hidden;
  border-radius: 5px;
  background: #1a2d27;
}

.qm9-bar {
  display: block;
  height: 100%;
  border-radius: inherit;
  transition: width 180ms ease;
}

.qm9-bar-mist {
  background: var(--mint);
}

.qm9-bar-ridge {
  background: var(--warm);
}

.qm9-bar-legend {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-top: 1rem;
  color: var(--muted);
  font-size: 0.66rem;
}

.qm9-bar-legend span {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
}

.qm9-bar-legend i {
  width: 14px;
  height: 5px;
  border-radius: 2px;
}

.qm9-bar-legend .mist {
  background: var(--mint);
}

.qm9-bar-legend .ridge {
  background: var(--warm);
}

.qm9-claim-boundary h3 {
  margin: 0.2rem 0 0;
  font-size: 1.05rem;
}

.qm9-claim-boundary ul {
  margin: 0.85rem 0 1rem;
  padding-left: 1.1rem;
  color: var(--muted);
  font-size: 0.75rem;
}

.qm9-claim-boundary li + li {
  margin-top: 0.38rem;
}

.qm9-claim-boundary a {
  color: var(--mint);
  font-size: 0.75rem;
  font-weight: 750;
  text-decoration: none;
}

.qm9-claim-boundary a:hover {
  text-decoration: underline;
}

.qm9-table-wrap {
  overflow-x: auto;
  margin-top: 0.75rem;
  border: 1px solid var(--line);
  border-radius: 11px;
}

.qm9-table-wrap tbody th {
  background: transparent;
  color: var(--ink);
  font-size: inherit;
  letter-spacing: 0.04em;
}

.qm9-table-wrap tbody tr:last-child th,
.qm9-table-wrap tbody tr:last-child td {
  border-bottom: 0;
}

.qm9-footnote {
  margin: 0.85rem 0 0;
  padding-left: 0.85rem;
  border-left: 2px solid var(--warm);
  color: #c4cbc8;
  font-size: 0.7rem;
}

.qm9-provenance {
  margin: 0.75rem 0 0;
  color: var(--dim);
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.66rem;
  overflow-wrap: anywhere;
}

.explorer-shell {
  width: min(calc(100% - 2.5rem), var(--max-width));
  margin: 0 auto;
  padding: 5.5rem 0;
  scroll-margin-top: 48px;
}

.section-heading {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 2rem;
  margin-bottom: 2rem;
}

.section-heading h2,
.method-intro h2,
.status-section h2 {
  max-width: 720px;
  margin: 0;
  font-size: clamp(2.2rem, 4.5vw, 4rem);
  font-weight: 590;
  letter-spacing: -0.045em;
  line-height: 1.03;
}

.demo-stamp {
  display: flex;
  align-items: center;
  gap: 0.7rem;
  color: var(--warm);
  font-size: 0.75rem;
  font-weight: 750;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.demo-stamp span {
  padding: 0.28rem 0.46rem;
  border: 1px solid currentColor;
  border-radius: 4px;
}

.explorer-grid {
  display: grid;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--panel);
  box-shadow: 0 32px 90px rgba(0, 0, 0, 0.24);
  grid-template-columns: 292px minmax(0, 1fr);
}

.controls {
  padding: 1.7rem;
  border-right: 1px solid var(--line);
  background: #0a1814;
}

.control-group + .control-group {
  margin-top: 1.5rem;
}

.control-group label {
  display: block;
  margin-bottom: 0.5rem;
  color: var(--ink);
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

select {
  width: 100%;
  min-height: 46px;
  padding: 0.65rem 2.4rem 0.65rem 0.75rem;
  border: 1px solid var(--line-bright);
  border-radius: 8px;
  background: var(--panel-2);
  color: var(--ink);
  cursor: pointer;
}

select:hover {
  border-color: var(--mint-deep);
}

.control-help {
  margin: 0.55rem 0 0;
  color: var(--muted);
  font-size: 0.75rem;
  line-height: 1.45;
}

.split-counts {
  margin-top: 2rem;
  padding-top: 1.35rem;
  border-top: 1px solid var(--line);
}

.split-counts h3 {
  margin: 0 0 0.75rem;
  font-size: 0.82rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.count-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.25rem 0;
  color: var(--muted);
  font-size: 0.78rem;
}

.count-row strong {
  color: var(--ink);
  font-variant-numeric: tabular-nums;
}

.count-bar {
  display: flex;
  height: 7px;
  overflow: hidden;
  gap: 2px;
  margin-top: 0.7rem;
  border-radius: 4px;
  background: var(--line);
}

.count-bar span {
  display: block;
  width: 0;
  transition: width 180ms ease;
}

.count-bar .train { background: var(--mint); }
.count-bar .validation { background: var(--lime); }
.count-bar .test { background: var(--warm); }

.similarity-note {
  display: flex;
  gap: 0.75rem;
  margin-top: 2rem;
  padding: 1rem;
  border: 1px solid rgba(97, 228, 197, 0.2);
  border-radius: 12px;
  background: rgba(97, 228, 197, 0.055);
}

.similarity-note svg {
  width: 22px;
  height: 22px;
  flex: none;
  fill: none;
  stroke: var(--mint);
  stroke-linecap: round;
  stroke-width: 1.5;
}

.similarity-note strong {
  font-size: 0.77rem;
}

.similarity-note p {
  margin: 0.35rem 0 0;
  color: var(--muted);
  font-size: 0.7rem;
  line-height: 1.5;
}

.results-panel {
  min-width: 0;
  padding: 1.7rem clamp(1.2rem, 3vw, 2.3rem) 2rem;
}

.results-header {
  display: flex;
  min-height: 52px;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
}

.results-kicker {
  margin: 0;
  color: var(--warm);
  font-size: 0.68rem;
  font-weight: 800;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.results-header h3 {
  margin: 0.15rem 0 0;
  font-size: 1.1rem;
}

.view-toggle {
  display: inline-flex;
  padding: 3px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #081511;
}

.view-toggle button {
  min-height: 34px;
  padding: 0.35rem 0.7rem;
  border: 0;
  border-radius: 5px;
  background: transparent;
  color: var(--muted);
  cursor: pointer;
  font-size: 0.7rem;
  font-weight: 750;
}

.view-toggle button[aria-pressed="true"] {
  background: var(--panel-2);
  color: var(--mint);
  box-shadow: inset 0 0 0 1px var(--line-bright);
}

.metric-grid {
  display: grid;
  gap: 0.65rem;
  margin-top: 1.35rem;
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.metric-card {
  min-width: 0;
  padding: 0.9rem;
  border: 1px solid var(--line);
  border-radius: 11px;
  background: #0a1814;
}

.metric-card span,
.metric-card small {
  display: block;
  overflow: hidden;
  color: var(--muted);
  font-size: 0.64rem;
  letter-spacing: 0.04em;
  text-overflow: ellipsis;
  text-transform: uppercase;
  white-space: nowrap;
}

.metric-card strong {
  display: block;
  margin: 0.18rem 0 0.08rem;
  font-size: clamp(1.3rem, 2.5vw, 1.75rem);
  font-variant-numeric: tabular-nums;
  font-weight: 600;
  letter-spacing: -0.04em;
}

.metric-card.accent {
  border-color: rgba(97, 228, 197, 0.27);
  background: rgba(97, 228, 197, 0.06);
}

.metric-card.accent strong {
  color: var(--mint);
}

.chart-card {
  margin: 0.75rem 0 0;
  padding: 1rem;
  border: 1px solid var(--line);
  border-radius: 13px;
  background: #091712;
}

.chart-card figcaption {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 0.5rem;
}

.chart-card figcaption strong {
  font-size: 0.82rem;
}

.chart-card figcaption span {
  color: var(--muted);
  font-size: 0.68rem;
}

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

#result-chart {
  display: block;
  width: 100%;
  height: auto;
  min-height: 310px;
}

#result-chart .grid-line {
  stroke: #1e332c;
  stroke-width: 1;
}

#result-chart .axis-line {
  stroke: #567067;
  stroke-width: 1;
}

#result-chart .tick-label,
#result-chart .axis-label {
  fill: #93a69f;
  font-family: inherit;
  font-size: 11px;
}

#result-chart .axis-label {
  font-size: 12px;
  font-weight: 700;
}

#result-chart .ideal-line {
  stroke: var(--warm);
  stroke-dasharray: 5 7;
  stroke-width: 1.5;
}

#result-chart .point-halo {
  fill: rgba(97, 228, 197, 0.12);
}

#result-chart .point {
  fill: var(--mint);
  stroke: #06211a;
  stroke-width: 2;
}

.chart-legend {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  color: var(--muted);
  font-size: 0.66rem;
}

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

.chart-legend .dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--mint);
}

.chart-legend .line {
  width: 18px;
  border-top: 1px dashed var(--warm);
}

.table-wrap {
  overflow-x: auto;
  margin-top: 0.8rem;
  border: 1px solid var(--line);
  border-radius: 11px;
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.72rem;
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}

caption {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
}

th,
td {
  padding: 0.65rem 0.75rem;
  border-bottom: 1px solid var(--line);
  text-align: right;
}

th {
  background: #081511;
  color: var(--muted);
  font-size: 0.61rem;
  letter-spacing: 0.035em;
  text-transform: uppercase;
}

th:first-child,
th:nth-child(2),
td:first-child,
td:nth-child(2) {
  text-align: left;
}

tbody tr:last-child td {
  border-bottom: 0;
}

tbody tr:hover {
  background: rgba(97, 228, 197, 0.045);
}

.results-disclaimer {
  margin: 0.85rem 0 0;
  padding: 0.75rem 0.9rem;
  border-left: 2px solid var(--warm);
  background: rgba(255, 214, 122, 0.055);
  color: #c4cbc8;
  font-size: 0.7rem;
}

.method-section {
  display: grid;
  width: min(calc(100% - 2.5rem), var(--max-width));
  grid-template-columns: 0.8fr 1.2fr;
  gap: clamp(2.5rem, 7vw, 7rem);
  margin: 0 auto;
  padding: 6rem 0;
  border-top: 1px solid var(--line);
  scroll-margin-top: 48px;
}

.method-intro > p:last-child {
  max-width: 600px;
  margin: 1.4rem 0 0;
  color: var(--muted);
}

.method-cards article {
  display: grid;
  padding: 1.4rem 0;
  border-bottom: 1px solid var(--line);
  grid-template-columns: 48px 1fr;
  column-gap: 1rem;
}

.method-cards article:first-child {
  border-top: 1px solid var(--line);
}

.method-number {
  color: var(--mint);
  font-size: 0.72rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  grid-row: 1 / 3;
}

.method-cards h3 {
  margin: 0;
  font-size: 1.12rem;
}

.method-cards p {
  margin: 0.35rem 0 0;
  color: var(--muted);
  font-size: 0.88rem;
}

.status-section {
  display: grid;
  width: min(calc(100% - 2.5rem), var(--max-width));
  grid-template-columns: 1fr 0.75fr;
  gap: 3rem;
  margin: 1rem auto 6rem;
  padding: clamp(2rem, 5vw, 4rem);
  border: 1px solid rgba(255, 214, 122, 0.24);
  border-radius: var(--radius);
  background:
    linear-gradient(135deg, rgba(255, 214, 122, 0.06), transparent 45%),
    var(--panel);
}

.status-section > div > p:last-child {
  max-width: 700px;
  margin: 1rem 0 0;
  color: var(--muted);
}

.status-links {
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.status-links a {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.95rem 0;
  border-bottom: 1px solid var(--line);
  color: var(--ink);
  font-size: 0.86rem;
  font-weight: 700;
  text-decoration: none;
}

.status-links a:first-child {
  border-top: 1px solid var(--line);
}

.status-links a:hover {
  color: var(--mint);
}

footer {
  display: grid;
  width: min(calc(100% - 2.5rem), var(--max-width));
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
  margin: 0 auto;
  padding: 2.2rem 0 4rem;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.72rem;
}

footer strong {
  color: var(--ink);
}

footer p {
  margin: 0.25rem 0 0;
}

#provenance {
  align-self: center;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  overflow-wrap: anywhere;
}

.footer-warning {
  grid-column: 1 / -1;
  padding: 0.55rem 0.7rem;
  border: 1px solid rgba(255, 214, 122, 0.28);
  border-radius: 6px;
  color: var(--warm);
  font-weight: 800;
  letter-spacing: 0.055em;
  text-align: center;
  text-transform: uppercase;
}

.noscript {
  position: fixed;
  z-index: 30;
  right: 1rem;
  bottom: 1rem;
  left: 1rem;
  margin: 0;
  padding: 1rem;
  border: 1px solid var(--danger);
  border-radius: 8px;
  background: #2f1714;
  color: #ffd5c7;
  text-align: center;
}

.error-state {
  margin: 2rem 0;
  padding: 1rem;
  border: 1px solid var(--danger);
  border-radius: 10px;
  background: #2f1714;
  color: #ffd5c7;
}

@media (max-width: 980px) {
  .hero {
    min-height: auto;
    grid-template-columns: 1fr;
    padding-top: 4rem;
  }

  .hero-copy {
    max-width: 780px;
  }

  .hero-visual {
    display: none;
  }

  .qm9-metric-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .qm9-detail-grid {
    grid-template-columns: 1fr;
  }

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

  .controls {
    display: grid;
    border-right: 0;
    border-bottom: 1px solid var(--line);
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 1.3rem;
  }

  .control-group + .control-group,
  .split-counts,
  .similarity-note {
    margin-top: 0;
  }

  .split-counts {
    padding-top: 0;
    border-top: 0;
  }

  .method-section {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 720px) {
  .status-bar {
    min-height: 41px;
    padding: 0.38rem 0.6rem;
    font-size: 0.63rem;
    line-height: 1.3;
  }

  .site-header {
    width: min(calc(100% - 1.5rem), var(--max-width));
    min-height: 66px;
  }

  .brand {
    font-size: 0.72rem;
  }

  .brand-mark {
    width: 28px;
  }

  .site-header nav a:not(:last-child) {
    display: none;
  }

  .hero,
  .qm9-section,
  .explorer-shell,
  .method-section,
  .status-section,
  footer {
    width: min(calc(100% - 1.5rem), var(--max-width));
  }

  .hero {
    padding: 3.5rem 0 4rem;
  }

  h1 {
    font-size: clamp(3rem, 16vw, 4.5rem);
  }

  .section-heading {
    align-items: start;
    flex-direction: column;
  }

  .result-stamp {
    align-items: flex-start;
    flex-direction: column;
    text-align: left;
  }

  .qm9-section {
    padding: 4rem 0;
  }

  .cohort-toggle {
    display: flex;
    width: 100%;
  }

  .cohort-toggle button {
    flex: 1;
  }

  .qm9-chart-card figcaption {
    align-items: flex-start;
    flex-direction: column;
  }

  .explorer-shell {
    padding: 4rem 0;
  }

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

  .results-header {
    align-items: start;
    flex-direction: column;
  }

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

  .chart-wrap {
    min-height: 245px;
    overflow-x: auto;
  }

  #result-chart {
    min-width: 520px;
    min-height: 250px;
  }

  .method-section {
    padding: 4rem 0;
  }

  .status-section {
    grid-template-columns: 1fr;
    margin-bottom: 4rem;
  }

  footer {
    grid-template-columns: 1fr;
  }

  .footer-warning {
    grid-column: auto;
  }
}

@media (max-width: 430px) {
  .brand span {
    max-width: 165px;
    line-height: 1.25;
  }

  .hero-actions .button {
    width: 100%;
  }

  .metric-card {
    padding: 0.8rem 0.7rem;
  }

  .qm9-metric-grid {
    grid-template-columns: 1fr;
  }

  .cohort-toggle {
    flex-direction: column;
  }

  .qm9-bar-header,
  .qm9-bar-row {
    grid-template-columns: 2.8rem minmax(80px, 1fr) 4.4rem;
  }
}

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

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