:root {
  --sparc-navy: #142f55;
  --sparc-green: #007d43;
  --sparc-teal: #1686a4;
  --sparc-orange: #e76b22;
  --sparc-mist: #eef5f4;
  --sparc-soft: #f5f7f8;
  --sparc-border: #d9e0e3;
}

.sparc-page {
  color: #1f2529;
  background: #fff;
}

.sparc-page h1,
.sparc-page h2,
.sparc-page h3 {
  letter-spacing: 0;
}

.project-header {
  display: flex;
  gap: 32px;
  align-items: center;
  justify-content: space-between;
  width: min(1180px, calc(100% - 48px));
  min-height: 72px;
  margin: 0 auto;
}

.project-wordmark {
  color: #1f2529;
  font-weight: 700;
  text-decoration: none;
}

.project-header-actions,
.project-nav {
  display: flex;
  align-items: center;
}

.project-header-actions {
  gap: 26px;
}

.project-nav {
  gap: 24px;
  font-size: 0.9rem;
}

.project-nav a {
  color: #596168;
  text-decoration: none;
}

.project-nav a:hover {
  color: var(--sparc-green);
}

.project-header .language-switch {
  flex: 0 0 auto;
  margin: 0;
}

.sparc-hero {
  position: relative;
  display: flex;
  min-height: clamp(520px, 72svh, 650px);
  overflow: hidden;
  color: #fff;
  background: var(--sparc-navy);
  isolation: isolate;
}

.sparc-hero::after {
  position: absolute;
  inset: 0;
  z-index: -1;
  background: rgba(20, 47, 85, 0.78);
  content: "";
}

.sparc-hero-motion {
  position: absolute;
  inset: 0;
  z-index: -2;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  filter: saturate(0.8) contrast(1.08);
}

.sparc-hero-content {
  width: min(1180px, calc(100% - 48px));
  margin: auto;
  padding: 72px 0 82px;
}

.sparc-venue,
.project-eyebrow {
  margin: 0 0 14px;
  color: var(--sparc-green);
  font-size: 0.78rem;
  font-weight: 750;
  letter-spacing: 0;
  text-transform: uppercase;
}

.sparc-venue {
  color: #91e0b5;
}

.sparc-hero h1 {
  display: flex;
  max-width: 900px;
  margin: 0;
  flex-direction: column;
  font-size: 1rem;
  line-height: 1;
}

.sparc-name {
  color: #fff;
  font-size: 5.4rem;
  font-weight: 760;
  line-height: 0.95;
}

.sparc-title {
  max-width: 820px;
  margin-top: 18px;
  color: #e9f2f5;
  font-size: 2rem;
  font-weight: 560;
  line-height: 1.18;
}

.sparc-authors {
  display: flex;
  flex-wrap: wrap;
  gap: 4px 10px;
  max-width: 780px;
  margin: 26px 0 0;
  color: #d7e2e8;
  font-size: 1rem;
}

.sparc-authors span {
  display: block;
  width: 100%;
  color: #9eb1bd;
  font-size: 0.86rem;
}

.sparc-summary {
  max-width: 720px;
  margin: 24px 0 0;
  color: #f1f6f7;
  font-size: 1.16rem;
  line-height: 1.55;
}

.sparc-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 22px;
  align-items: center;
  margin-top: 30px;
}

.sparc-actions a {
  color: #fff;
  font-size: 0.94rem;
  font-weight: 650;
  text-decoration-color: rgba(255, 255, 255, 0.45);
}

.sparc-actions .primary-action {
  padding: 10px 15px;
  border: 1px solid #fff;
  border-radius: 4px;
  text-decoration: none;
}

.sparc-actions a:hover {
  color: #a4ecc4;
}

.project-section,
.deck-section,
.citation-section {
  padding: 90px 0;
}

.project-section-inner {
  width: min(1180px, calc(100% - 48px));
  margin: 0 auto;
}

.project-section h2,
.deck-section h2,
.citation-section h2 {
  max-width: 800px;
  margin: 0;
  color: #20272c;
  font-size: 2.45rem;
  font-weight: 690;
  line-height: 1.14;
}

.overview-layout,
.resources-layout,
.citation-layout {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
  gap: 80px;
  align-items: start;
}

.project-lede,
.section-intro > p:last-child,
.poster-copy > p:last-child,
.citation-layout > p {
  margin: 3px 0 0;
  color: #596168;
  font-size: 1.08rem;
  line-height: 1.65;
}

.metric-band {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  width: min(1180px, calc(100% - 48px));
  margin: 76px auto 0;
  border-top: 1px solid var(--sparc-border);
  border-bottom: 1px solid var(--sparc-border);
}

.metric {
  min-height: 142px;
  padding: 26px 24px;
  border-right: 1px solid var(--sparc-border);
}

.metric:last-child {
  border-right: 0;
}

.metric strong,
.metric span {
  display: block;
}

.metric strong {
  color: var(--sparc-navy);
  font-size: 2.35rem;
  line-height: 1.1;
}

.metric span {
  margin-top: 12px;
  color: #687078;
  font-size: 0.88rem;
  line-height: 1.35;
}

.method-section {
  background: var(--sparc-mist);
}

.method-steps {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 36px;
  margin-top: 50px;
}

.method-steps article {
  padding-top: 20px;
  border-top: 3px solid var(--sparc-green);
}

.method-steps article:nth-child(2) {
  border-color: var(--sparc-teal);
}

.method-steps article:nth-child(3) {
  border-color: var(--sparc-orange);
}

.method-number {
  color: #7b858c;
  font-size: 0.78rem;
  font-weight: 750;
}

.method-steps h3 {
  margin: 18px 0 10px;
  font-size: 1.15rem;
}

.method-steps p {
  margin: 0;
  color: #596168;
  font-size: 0.96rem;
  line-height: 1.62;
}

.section-intro {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 0.9fr);
  gap: 12px 80px;
  align-items: start;
  margin-bottom: 46px;
}

.section-intro .project-eyebrow,
.section-intro h2 {
  grid-column: 1;
}

.section-intro > p:last-child {
  grid-column: 2;
  grid-row: 1 / span 2;
}

.animation-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 24px;
}

.animation-feature {
  margin: 0;
  overflow: hidden;
  border: 1px solid var(--sparc-border);
  border-radius: 6px;
  background: #fff;
}

.animation-feature-wide {
  grid-column: 1 / -1;
}

.animation-feature img {
  display: block;
  width: 100%;
  aspect-ratio: 16 / 6;
  object-fit: contain;
  background: #fff;
}

.animation-feature-wide img {
  aspect-ratio: 16 / 5.4;
}

.animation-feature figcaption {
  padding: 14px 16px 16px;
  border-top: 1px solid var(--sparc-border);
  color: #4f5960;
  font-size: 0.9rem;
}

.deck-section {
  color: #edf4f6;
  background: #17242c;
}

.deck-section .project-eyebrow {
  color: #81d8a9;
}

.deck-section h2 {
  color: #fff;
}

.deck-section .section-intro > p:last-child {
  color: #b8c7ce;
}

.deck-switch {
  display: inline-grid;
  grid-template-columns: repeat(2, minmax(150px, 1fr));
  gap: 2px;
  margin-bottom: 14px;
  padding: 3px;
  border: 1px solid #40515b;
  border-radius: 5px;
  background: #0f181e;
}

.deck-switch button {
  min-height: 38px;
  padding: 7px 14px;
  border: 0;
  border-radius: 3px;
  color: #b8c7ce;
  background: transparent;
  font: inherit;
  font-size: 0.82rem;
  font-weight: 700;
  cursor: pointer;
}

.deck-switch button:hover {
  color: #fff;
}

.deck-switch button[aria-pressed="true"] {
  color: #0d2b1e;
  background: #81d8a9;
}

.deck-switch button:focus-visible {
  outline: 2px solid #fff;
  outline-offset: -2px;
}

.slide-player {
  overflow: hidden;
  border: 1px solid #40515b;
  border-radius: 6px;
  background: #0f181e;
}

.slide-stage {
  position: relative;
  width: 100%;
  aspect-ratio: 16 / 9;
  overflow: hidden;
  background: #fff;
}

.slide-stage:focus-visible {
  outline: 3px solid #7fe2ac;
  outline-offset: -3px;
}

.slide-image {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.slide-animation-overlay {
  position: absolute;
  top: 29%;
  left: 51%;
  width: 44%;
  height: 42%;
  object-fit: contain;
  background: #fff;
}

.live-indicator {
  position: absolute;
  top: 12px;
  right: 12px;
  padding: 5px 8px;
  border-radius: 3px;
  color: #fff;
  background: rgba(0, 125, 67, 0.92);
  font-size: 0.72rem;
  font-weight: 700;
}

.slide-controls {
  display: grid;
  grid-template-columns: 38px minmax(100px, 1fr) 62px auto 38px 38px;
  gap: 12px;
  align-items: center;
  min-height: 62px;
  padding: 10px 14px;
}

.slide-icon-button,
.slide-mode-button {
  height: 38px;
  border: 1px solid #455863;
  border-radius: 4px;
  color: #edf4f6;
  background: #17242c;
  font: inherit;
  cursor: pointer;
}

.slide-icon-button {
  width: 38px;
  padding: 0;
  font-size: 1.3rem;
  line-height: 1;
}

.slide-mode-button {
  min-width: 110px;
  padding: 0 12px;
  font-size: 0.78rem;
  font-weight: 650;
}

.slide-icon-button:hover,
.slide-mode-button:hover {
  border-color: #7fe2ac;
  color: #7fe2ac;
}

.slide-icon-button:disabled {
  opacity: 0.35;
  cursor: default;
}

.slide-range-wrap {
  display: flex;
  align-items: center;
}

.slide-range {
  width: 100%;
  accent-color: #58ce8c;
}

.slide-counter {
  color: #c3d0d6;
  font-size: 0.78rem;
  font-variant-numeric: tabular-nums;
  text-align: center;
}

.poster-section {
  background: var(--sparc-soft);
}

.poster-layout {
  display: grid;
  grid-template-columns: minmax(220px, 0.42fr) minmax(0, 1.58fr);
  gap: 64px;
  align-items: start;
}

.poster-copy {
  position: sticky;
  top: 24px;
}

.poster-preview {
  display: block;
  overflow: hidden;
  border: 1px solid #bdcbd0;
  border-radius: 4px;
  background: #fff;
}

.poster-preview img {
  display: block;
  width: 100%;
  height: auto;
}

.resource-list {
  border-top: 1px solid var(--sparc-border);
}

.resource-list a {
  display: flex;
  gap: 20px;
  align-items: center;
  justify-content: space-between;
  min-height: 82px;
  padding: 14px 4px;
  border-bottom: 1px solid var(--sparc-border);
  color: #253038;
  text-decoration: none;
}

.resource-list a:hover {
  color: var(--sparc-green);
}

.resource-list strong,
.resource-list small {
  display: block;
}

.resource-list small {
  margin-top: 4px;
  color: #737d84;
}

.resource-list a > span:last-child {
  color: var(--sparc-green);
  font-size: 1.3rem;
}

.citation-section {
  color: #e9f0f2;
  background: var(--sparc-navy);
}

.citation-section .project-eyebrow {
  color: #91e0b5;
}

.citation-section h2 {
  color: #fff;
}

.citation-layout > p {
  color: #d5e1e6;
}

.project-footer {
  display: flex;
  gap: 30px;
  align-items: center;
  justify-content: space-between;
  width: min(1180px, calc(100% - 48px));
  min-height: 82px;
  margin: 0 auto;
  color: #737d84;
  font-size: 0.88rem;
}

.project-footer a {
  color: #253038;
  font-weight: 700;
  text-decoration: none;
}

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

@media (max-width: 860px) {
  .project-header {
    align-items: flex-start;
    padding: 18px 0;
  }

  .project-header-actions {
    gap: 14px;
    align-items: flex-end;
    flex-direction: column-reverse;
  }

  .project-nav {
    gap: 12px 18px;
    justify-content: flex-end;
    flex-wrap: wrap;
  }

  .overview-layout,
  .resources-layout,
  .citation-layout,
  .poster-layout,
  .section-intro {
    grid-template-columns: 1fr;
    gap: 26px;
  }

  .section-intro > p:last-child {
    grid-column: 1;
    grid-row: auto;
  }

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

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

  .metric:nth-child(-n + 2) {
    border-bottom: 1px solid var(--sparc-border);
  }

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

  .poster-copy {
    position: static;
  }
}

@media (max-width: 620px) {
  .project-header,
  .sparc-hero-content,
  .project-section-inner,
  .metric-band,
  .project-footer {
    width: min(100% - 32px, 1180px);
  }

  .project-header {
    gap: 14px;
    min-height: 68px;
  }

  .project-nav {
    display: none;
  }

  .sparc-hero {
    min-height: 590px;
  }

  .sparc-hero-content {
    padding: 56px 0 66px;
  }

  .sparc-name {
    font-size: 4rem;
  }

  .sparc-title {
    font-size: 1.48rem;
  }

  .sparc-summary {
    font-size: 1rem;
  }

  .project-section,
  .deck-section,
  .citation-section {
    padding: 66px 0;
  }

  .project-section h2,
  .deck-section h2,
  .citation-section h2 {
    font-size: 2rem;
  }

  .metric {
    min-height: 126px;
    padding: 22px 16px;
  }

  .metric strong {
    font-size: 1.85rem;
  }

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

  .animation-feature-wide {
    grid-column: auto;
  }

  .animation-feature img,
  .animation-feature-wide img {
    aspect-ratio: 16 / 7;
  }

  .slide-controls {
    grid-template-columns: 38px minmax(70px, 1fr) 52px 38px 38px;
    gap: 7px;
    padding: 8px;
  }

  .slide-mode-button {
    display: none;
  }

  .slide-animation-overlay {
    top: 28%;
    height: 43%;
  }

  .deck-switch {
    display: grid;
    grid-template-columns: 1fr;
    width: 100%;
  }

  .project-footer {
    align-items: flex-start;
    flex-direction: column;
    justify-content: center;
  }
}

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