html {
  scroll-behavior: smooth;
  scroll-padding-top: 24px;
}

body {
  --accent: #2e7057;
  --viewer-dark: #101713;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

button,
a,
input,
select,
summary {
  touch-action: manipulation;
}

button,
summary {
  cursor: pointer;
}

button:disabled {
  cursor: wait;
  opacity: 0.55;
}

[hidden] {
  display: none !important;
}

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

.wrap {
  width: min(100%, 1180px);
  margin: 0 auto;
  padding-inline: 30px;
}

.viewer-header {
  border-bottom: 1px solid var(--line);
  background: var(--paper);
}

.viewer-nav {
  min-height: 64px;
  display: flex;
  align-items: center;
  gap: 20px;
  font-size: 0.84rem;
  color: var(--muted);
}

.viewer-title {
  color: var(--ink);
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: 0.08em;
}

.viewer-nav > span {
  padding-left: 20px;
  border-left: 1px solid var(--line);
}

.viewer-nav nav {
  display: flex;
  gap: 22px;
  margin-left: auto;
}

.viewer-nav nav a,
.viewer-footer a {
  text-decoration: underline;
  text-decoration-color: transparent;
  text-underline-offset: 3px;
}

.viewer-nav nav a:hover,
.viewer-footer a:hover {
  color: var(--ink);
  text-decoration-color: currentColor;
}

.viewer-intro {
  max-width: 780px;
  padding: 64px 0 48px;
}

.eyebrow {
  margin: 0 0 12px;
  color: var(--accent);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.11em;
  text-transform: uppercase;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1,
h2,
h3 {
  color: var(--ink);
}

h1 {
  margin-bottom: 15px;
  font-size: clamp(2rem, 4vw, 3.3rem);
  line-height: 1.08;
  letter-spacing: -0.035em;
}

h2 {
  margin-bottom: 9px;
  font-size: clamp(1.45rem, 2.5vw, 2rem);
  line-height: 1.2;
  letter-spacing: -0.02em;
}

.viewer-intro > p:last-child {
  max-width: 720px;
  margin: 0;
  color: var(--muted);
  font-size: 1rem;
  line-height: 1.7;
}

.comparison-section {
  padding: 38px 0 54px;
  border-top: 1px solid var(--line);
}

.section-top,
.sample-heading,
.detail-head,
.comparison-foot,
.chart-heading,
.step-inspector-heading,
.citation-heading {
  display: flex;
  justify-content: space-between;
  gap: 24px;
}

.section-top {
  align-items: baseline;
  margin-bottom: 18px;
}

.section-top .eyebrow {
  margin: 0;
}

.quiet,
.tiny {
  color: var(--muted);
}

.quiet {
  font-size: 0.75rem;
}

.tiny {
  font-size: 0.7rem;
  line-height: 1.6;
}

.setting-tabs {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
  margin-bottom: 34px;
}

.setting-tab {
  min-width: 0;
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 9px;
  color: var(--ink);
  text-align: left;
  background: transparent;
  border: 1px solid var(--line);
}

.setting-tab:hover,
.setting-tab[aria-pressed="true"] {
  border-color: var(--accent);
  background: var(--paper);
}

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

.setting-tab img {
  width: 76px;
  height: 48px;
  display: block;
  flex: 0 0 auto;
  object-fit: cover;
  background: var(--line);
}

.setting-tab strong,
.setting-tab small {
  display: block;
}

.setting-tab strong {
  margin-bottom: 4px;
  font-size: 0.78rem;
}

.setting-tab small {
  color: var(--muted);
  font-size: 0.66rem;
}

.tab-arrow {
  margin-left: auto;
  padding-right: 4px;
  color: var(--accent);
}

.sample-heading {
  align-items: flex-start;
  margin-bottom: 20px;
}

.prompt {
  max-width: 720px;
  margin: 0;
  color: var(--muted);
  font-size: 0.83rem;
  line-height: 1.65;
}

.prompt-picker {
  width: min(100%, 300px);
  display: grid;
  gap: 6px;
  flex: 0 0 auto;
}

.prompt-picker label {
  color: var(--muted);
  font-size: 0.7rem;
}

select {
  max-width: 100%;
  padding: 8px 26px 8px 9px;
  color: var(--ink);
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 0;
  font-size: 0.72rem;
}

.metrics {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  margin-bottom: 18px;
  border-block: 1px solid var(--line);
}

.metrics > div {
  min-width: 0;
  padding: 16px 18px;
  border-right: 1px solid var(--line);
}

.metrics > div:last-child {
  border-right: 0;
}

.metrics span,
.metrics small {
  display: block;
  color: var(--muted);
  font-size: 0.66rem;
}

.metrics span {
  margin-bottom: 7px;
}

.metrics strong {
  display: block;
  color: var(--ink);
  font-size: clamp(1.15rem, 2.5vw, 1.5rem);
  font-variant-numeric: tabular-nums;
  font-weight: 500;
  letter-spacing: -0.02em;
  white-space: nowrap;
}

.metrics small {
  margin-top: 6px;
}

.metrics .gain-card strong {
  color: var(--accent);
}

.player-shell {
  overflow: hidden;
  color: #edf2ec;
  background: var(--viewer-dark);
  border: 1px solid var(--viewer-dark);
}

.player-top {
  min-height: 58px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 12px 18px;
}

.segmented {
  display: flex;
  gap: 3px;
  padding: 3px;
  background: #07100b;
}

.segmented button,
.ghost-button,
.play-button,
.frame-button,
.text-button {
  font: inherit;
}

.segmented button {
  padding: 7px 11px;
  color: #aeb9b1;
  background: transparent;
  border: 0;
  font-size: 0.69rem;
}

.segmented button[aria-pressed="true"] {
  color: #ffffff;
  background: #334239;
}

.ghost-button {
  padding: 7px 10px;
  color: #d9e2da;
  background: transparent;
  border: 1px solid #536057;
  font-size: 0.69rem;
}

.ghost-button span {
  padding-left: 10px;
}

.ghost-button[aria-expanded="true"] {
  border-color: #8eaa96;
  background: #284235;
}

.stage {
  position: relative;
  width: 100%;
  overflow: hidden;
  cursor: crosshair;
  background: #070c09;
  aspect-ratio: 832 / 480;
}

.stage video {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: fill;
  visibility: hidden;
}

.stage video.base {
  z-index: 1;
  visibility: visible;
}

.stage video.reveal {
  z-index: 2;
  visibility: visible;
  clip-path: inset(0 50% 0 0);
}

.stage-label {
  position: absolute;
  z-index: 5;
  top: 18px;
  padding: 6px 9px;
  color: #ffffff;
  background: #07130bd9;
  border: 1px solid #ffffff38;
  font-size: 0.7rem;
  pointer-events: none;
}

.label-left {
  left: 18px;
}

.label-right {
  right: 18px;
}

.split-line {
  position: absolute;
  z-index: 4;
  top: 0;
  bottom: 0;
  left: 50%;
  width: 2px;
  background: #ffffff;
  pointer-events: none;
}

.split-line > span {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 44px;
  height: 44px;
  display: grid;
  place-items: center;
  color: var(--ink);
  background: #ffffff;
  border-radius: 50%;
  font-size: 1.25rem;
  letter-spacing: 0.08em;
  cursor: ew-resize;
  pointer-events: auto;
  touch-action: none;
  transform: translate(-50%, -50%);
}

.focus-box {
  position: absolute;
  z-index: 3;
  width: 25%;
  height: 25%;
  border: 2px solid #d3f8da;
  pointer-events: none;
}

.loading,
.video-error {
  position: absolute;
  z-index: 8;
  inset: 0;
  display: grid;
  place-items: center;
  padding: 40px;
  color: #ffffff;
  background: #13261feb;
  text-align: center;
  font-size: 0.82rem;
}

.loading {
  grid-auto-flow: column;
  justify-content: center;
  gap: 12px;
}

.loading span {
  width: 14px;
  height: 14px;
  border: 2px solid #ffffff4d;
  border-top-color: #c7e0cd;
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

.video-error {
  z-index: 9;
  line-height: 1.8;
}

.wipe-control,
.transport {
  display: flex;
  align-items: center;
  gap: 12px;
}

.wipe-control {
  padding: 14px 20px 5px;
  color: #ced8d0;
  font-size: 0.68rem;
}

.wipe-control input {
  width: 170px;
}

.drag-hint {
  margin-left: auto;
  color: #96a49a;
  font-size: 0.62rem;
}

input[type="range"] {
  height: 18px;
  accent-color: #70b08b;
  cursor: pointer;
}

.transport {
  padding: 12px 20px 17px;
}

.play-button {
  min-width: 80px;
  padding: 8px 13px;
  color: var(--ink);
  background: #d6e8d8;
  border: 0;
  font-size: 0.72rem;
  white-space: nowrap;
}

.play-button span {
  padding-left: 4px;
}

.frame-button {
  padding: 0 3px;
  color: #d7e0d8;
  background: transparent;
  border: 0;
  font-size: 1.45rem;
  line-height: 1;
}

.transport #timeline {
  min-width: 40px;
  flex: 1;
}

.transport output {
  color: #c6d0c8;
  font-size: 0.68rem;
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}

.speed-label {
  display: flex;
  align-items: center;
  gap: 7px;
  margin-left: 6px;
  color: #afbbb1;
  font-size: 0.64rem;
}

.speed-label select {
  padding: 5px 8px;
  color: #edf2ed;
  background: #28342d;
  border-color: #47534b;
  font-size: 0.66rem;
}

.detail-panel {
  margin-top: 16px;
  padding: 20px;
  background: var(--paper);
  border: 1px solid var(--line);
}

.detail-head {
  align-items: baseline;
  margin-bottom: 16px;
}

.detail-head h3,
.detail-head p {
  margin-bottom: 0;
}

.detail-head h3 {
  font-size: 0.85rem;
}

.detail-head p {
  color: var(--muted);
  font-size: 0.7rem;
}

.detail-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
}

.detail-grid figure {
  margin: 0;
}

.detail-grid canvas {
  width: 100%;
  height: auto;
  display: block;
  background: var(--line);
}

.detail-grid figcaption {
  margin-top: 8px;
  color: var(--muted);
  text-align: center;
  font-size: 0.69rem;
}

.detail-grid figure:last-child figcaption {
  color: var(--accent);
  font-weight: 600;
}

.comparison-foot {
  align-items: center;
  margin-top: 14px;
  color: var(--muted);
  font-size: 0.7rem;
}

.text-button {
  padding: 4px 0;
  color: var(--accent);
  background: transparent;
  border: 0;
  font-size: 0.72rem;
  white-space: nowrap;
}

.allocation-expandable {
  margin: 0 0 44px;
  padding: 18px 0;
  border-block: 1px solid var(--line);
}

.allocation-expandable > summary {
  color: var(--accent);
  font-size: 0.82rem;
  font-weight: 600;
  list-style-position: inside;
}

.allocation-expandable > summary span {
  float: right;
}

.allocation-section {
  display: grid;
  grid-template-columns: minmax(220px, 0.65fr) minmax(0, 1.35fr);
  gap: 48px;
  padding: 38px 0 10px;
}

.allocation-copy h2 {
  margin-bottom: 14px;
}

.allocation-copy > p:not(.eyebrow) {
  max-width: 330px;
  color: var(--muted);
  font-size: 0.8rem;
  line-height: 1.75;
}

.allocation-facts {
  display: flex;
  gap: 28px;
  margin-top: 22px;
}

.allocation-facts strong,
.allocation-facts span {
  display: block;
}

.allocation-facts strong {
  font-size: 1.35rem;
  font-weight: 500;
  font-variant-numeric: tabular-nums;
}

.allocation-facts span {
  margin-top: 4px;
  color: var(--muted);
  font-size: 0.66rem;
}

.allocation-chart {
  min-width: 0;
  align-self: start;
  padding: 18px;
  background: var(--paper);
  border: 1px solid var(--line);
}

.chart-heading {
  margin-bottom: 14px;
  font-size: 0.78rem;
}

.cell-reading {
  color: var(--muted);
  font-size: 0.64rem;
  font-variant-numeric: tabular-nums;
}

.allocation-chart canvas {
  width: 100%;
  height: auto;
  display: block;
  touch-action: pan-y;
}

.density-legend {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  margin-top: 4px;
  color: var(--muted);
  font-size: 0.62rem;
}

.density-legend div {
  width: 130px;
  height: 7px;
  background: linear-gradient(90deg, #e3eee7, #255942);
}

.step-inspector {
  margin-top: 18px;
  padding-top: 16px;
  border-top: 1px solid var(--line);
}

.step-inspector-heading {
  margin-bottom: 9px;
  font-size: 0.7rem;
}

.step-inspector-heading span,
.step-inspector > p {
  color: var(--muted);
}

.step-inspector > p {
  margin: 5px 0 0;
  text-align: center;
  font-size: 0.62rem;
}

.denoising-control {
  display: flex;
  align-items: center;
  gap: 11px;
  margin-top: 14px;
  padding-top: 14px;
  color: var(--muted);
  border-top: 1px solid var(--line);
  font-size: 0.65rem;
}

.denoising-control input {
  min-width: 50px;
  flex: 1;
}

.denoising-control label,
.denoising-control > span {
  white-space: nowrap;
}

.reading-notes {
  margin-bottom: 40px;
  padding: 14px 0;
  color: var(--muted);
  border-bottom: 1px solid var(--line);
  font-size: 0.76rem;
}

.reading-notes > summary {
  color: var(--accent);
  font-weight: 600;
}

.reading-notes > p,
#experiment-details {
  margin: 10px 0 0;
  line-height: 1.7;
}

.citation-section {
  padding: 4px 0 54px;
}

.citation-heading {
  align-items: flex-end;
  margin-bottom: 15px;
}

.citation-heading h2,
.citation-heading .eyebrow {
  margin-bottom: 0;
}

.citation-heading .eyebrow {
  margin-bottom: 6px;
}

.citation-copy {
  text-decoration: underline;
  text-underline-offset: 3px;
}

.citation-section pre {
  overflow: auto;
  margin: 0;
  padding: 18px;
  color: var(--ink);
  background: var(--paper);
  border: 1px solid var(--line);
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  font-size: 0.72rem;
  line-height: 1.7;
  white-space: pre-wrap;
  word-break: break-word;
}

.viewer-footer {
  border-top: 1px solid var(--line);
  background: var(--paper);
}

.viewer-footer .wrap {
  min-height: 68px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  color: var(--muted);
  font-size: 0.75rem;
}

@media (max-width: 900px) {
  .metrics {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .metrics > div:nth-child(2) {
    border-right: 0;
  }

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

  .allocation-section {
    grid-template-columns: 1fr;
    gap: 28px;
  }

  .allocation-copy > p:not(.eyebrow) {
    max-width: 680px;
  }
}

@media (max-width: 700px) {
  .wrap {
    padding-inline: 18px;
  }

  .viewer-nav {
    min-height: 58px;
    gap: 12px;
  }

  .viewer-nav > span {
    padding-left: 12px;
  }

  .viewer-nav nav {
    gap: 12px;
  }

  .viewer-intro {
    padding: 44px 0 34px;
  }

  .comparison-section {
    padding-top: 28px;
  }

  .section-top,
  .sample-heading,
  .detail-head,
  .comparison-foot {
    align-items: flex-start;
    flex-direction: column;
    gap: 10px;
  }

  .setting-tabs {
    grid-template-columns: 1fr;
  }

  .setting-tab img {
    width: 96px;
    height: 58px;
  }

  .prompt-picker {
    width: 100%;
  }

  .player-top {
    align-items: stretch;
    flex-direction: column;
  }

  .segmented {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
  }

  .segmented button {
    padding-inline: 5px;
  }

  .wipe-control {
    flex-wrap: wrap;
  }

  .wipe-control input {
    min-width: 120px;
    flex: 1;
  }

  .drag-hint {
    width: 100%;
    margin-left: 0;
  }

  .transport {
    flex-wrap: wrap;
  }

  .transport #timeline {
    min-width: 45%;
  }

  .speed-label {
    margin-left: auto;
  }

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

  .allocation-chart {
    padding: 13px 9px;
  }

  .denoising-control {
    flex-wrap: wrap;
  }

  .denoising-control input {
    min-width: 60%;
  }
}

@media (max-width: 470px) {
  .viewer-nav > span {
    display: none;
  }

  .viewer-nav nav a:last-child {
    display: none;
  }

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

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

  .metrics > div:last-child {
    border-bottom: 0;
  }

  .stage-label {
    top: 10px;
  }

  .label-left {
    left: 10px;
  }

  .label-right {
    right: 10px;
  }

  .split-line > span {
    width: 38px;
    height: 38px;
  }

  .speed-label {
    width: 100%;
    justify-content: flex-end;
  }

  .allocation-facts {
    gap: 18px;
  }

  .chart-heading,
  .step-inspector-heading {
    flex-direction: column;
    gap: 4px;
  }
}