:root {
  --moa-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  --moa-gradient-soft: linear-gradient(135deg, rgba(102, 126, 234, 0.1) 0%, rgba(118, 75, 162, 0.1) 100%);
  --moa-gradient-dark: linear-gradient(135deg, #a78bfa 0%, #c084fc 100%);
  --ease: cubic-bezier(0.4, 0, 0.2, 1);
  --spring: cubic-bezier(0.34, 1.56, 0.64, 1);
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", "SF Pro Display", "Helvetica Neue", Arial, sans-serif;
  font-size: 17px;
  line-height: 1.47059;
  font-weight: 400;
  letter-spacing: -0.022em;
  color: var(--apple-black);
  background: #fff;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

img,
video {
  max-width: 100%;
}

/* Global Navigation */

/* Local Navigation */

/* Motion */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.reveal {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity 0.8s ease, transform 0.8s ease;
}

@media (prefers-reduced-motion: reduce) {
  *,
*::before,
*::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
  }

  .reveal {
    opacity: 1;
    transform: none;
  }
}

/* Hero */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 100px 24px 80px;
  background: linear-gradient(180deg, #fff 0%, var(--apple-light-gray) 100%);
  position: relative;
  overflow: hidden;
}

.hero::after {
  content: "";
  position: absolute;
  inset: auto 8% 0;
  height: 1px;
  z-index: 3;
  background: linear-gradient(90deg, transparent, rgba(0, 0, 0, 0.08), transparent);
}

.hero-canvas {
  position: absolute;
  inset: 0;
  z-index: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
}

.hero-vignette {
  position: absolute;
  inset: 0;
  z-index: 1;
  pointer-events: none;
  background: radial-gradient(
    ellipse 62% 66% at 50% 48%,
    rgba(255, 255, 255, 0.97) 0%,
    rgba(255, 255, 255, 0.9) 38%,
    rgba(255, 255, 255, 0.48) 68%,
    rgba(255, 255, 255, 0) 100%
  );
}

.hero-content {
  position: relative;
  z-index: 2;
  max-width: var(--max-width-wide);
  width: 100%;
}

.hero-title {
  font-size: clamp(48px, 8vw, 96px);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -0.045em;
  margin-bottom: 16px;
  padding: 0 10px;
  animation: fadeInUp 0.8s ease-out 0.1s backwards;
}

.hero-title span {
  background: var(--moa-gradient);
  padding-right: 0.05em;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-subtitle {
  font-size: clamp(21px, 3vw, 28px);
  font-weight: 400;
  color: var(--apple-gray);
  max-width: 720px;
  margin: 0 auto 40px;
  line-height: 1.38;
  animation: fadeInUp 0.8s ease-out 0.2s backwards;
}

.hero-stats {
  display: flex;
  gap: 60px;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 48px;
  animation: fadeInUp 0.8s ease-out 0.3s backwards;
}

.stat-item {
  text-align: center;
}

.stat-value {
  font-size: 56px;
  font-weight: 600;
  letter-spacing: -0.03em;
  background: var(--moa-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.stat-label {
  font-size: 14px;
  color: var(--apple-gray);
  margin-top: 4px;
}

.hero-cta,
.hero-actions {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  justify-content: center;
  align-items: center;
  animation: fadeInUp 0.8s ease-out 0.4s backwards;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 54px;
  padding: 16px 32px;
  border-radius: 980px;
  font-size: 17px;
  font-weight: 400;
  transition: all 0.3s var(--ease);
}

.hero-badge {
  background: transparent;
  color: var(--apple-blue);
  border: 1px solid var(--apple-blue);
}

.hero-badge:hover {
  background: var(--apple-blue);
  color: #fff;
}

/* Sections */
.section {
  padding: var(--section-padding);
}

.section-header {
  max-width: 760px;
  margin-bottom: 48px;
}

.section-header-centered {
  text-align: center;
  margin-left: auto;
  margin-right: auto;
}

.section-eyebrow {
  font-size: 14px;
  font-weight: 600;
  color: var(--apple-blue);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  margin-bottom: 8px;
}

.section-title {
  font-size: clamp(32px, 5vw, 56px);
  font-weight: 600;
  line-height: 1.1;
  letter-spacing: -0.03em;
  margin-bottom: 16px;
}

.section-subtitle {
  font-size: 21px;
  color: var(--apple-gray);
  max-width: 640px;
  line-height: 1.38;
}

.section-header-centered .section-subtitle {
  margin: 0 auto;
}

.section-dark .section-eyebrow {
  color: var(--apple-blue-dark);
}

.section-dark .section-title {
  color: #fff;
}

.section-dark .section-subtitle {
  color: rgba(255, 255, 255, 0.7);
}

.overview-grid,
.calibration-layout,
.demo-layout {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 64px;
  align-items: center;
}

.overview-content,
.calibration-copy,
.demo-copy {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.overview-point,
.demo-point {
  display: flex;
  gap: 16px;
  align-items: flex-start;
}

.overview-point p,
.demo-point p {
  color: #444;
  font-size: 16px;
  line-height: 1.5;
}

.overview-point strong {
  color: var(--apple-black);
}

.overview-point-icon {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  font-size: 15px;
}

.overview-point-icon.problem {
  background: rgba(239, 68, 68, 0.1);
  color: #ef4444;
}

.overview-point-icon.solution {
  background: rgba(34, 197, 94, 0.1);
  color: #22c55e;
}

.overview-figure,
.figure-panel,
.video-frame {
  width: 100%;
}

.overview-figure img,
.figure-panel img {
  display: block;
  width: 100%;
  border-radius: 16px;
  box-shadow: 0 8px 40px rgba(0, 0, 0, 0.08);
  background: #fff;
}

.figure-panel {
  margin: 40px auto 0;
  text-align: center;
}

.figure-panel figcaption {
  max-width: 760px;
  margin: 16px auto 0;
  color: var(--apple-gray);
  font-size: 15px;
  line-height: 1.5;
}

.figure-narrow {
  max-width: 680px;
}

.dark-figure {
  margin: 56px 0 0;
}

/* Discovery: two-observation layout */
.observation-block {
  margin-top: 56px;
}

.observation-copy {
  max-width: 760px;
  margin-bottom: 28px;
}

.observation-label {
  display: inline-block;
  color: var(--apple-blue-dark);
  font-size: 13px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  margin-bottom: 10px;
}

.observation-copy h3 {
  color: #fff;
  font-size: clamp(24px, 3vw, 34px);
  line-height: 1.14;
  letter-spacing: -0.03em;
  margin-bottom: 14px;
}

.observation-copy p {
  color: rgba(255, 255, 255, 0.68);
  font-size: 16px;
  line-height: 1.6;
}

.observation-rule {
  font-family: "SF Mono", ui-monospace, Menlo, monospace;
  font-size: 15px;
  color: #fff;
  background: rgba(10, 132, 255, 0.16);
  border-radius: 6px;
  padding: 1px 7px;
  white-space: nowrap;
}

.observation-figure {
  margin: 0;
}

.observation-figure img {
  display: block;
  width: 100%;
  border-radius: 16px;
  border: 1px solid rgba(255, 255, 255, 0.1);
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.28);
}

.observation-figure figcaption {
  margin-top: 14px;
  color: rgba(255, 255, 255, 0.52);
  font-size: 13px;
  line-height: 1.55;
}

/* Matrix animation stage */
.matrix-stage {
  padding: 34px;
  border-radius: 24px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.1);
  box-shadow: 0 20px 70px rgba(0, 0, 0, 0.22);
}

.matrix-stage-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
  margin-bottom: 26px;
}

.matrix-stage-kicker {
  color: rgba(255, 255, 255, 0.5);
  font-size: 12px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.matrix-length-readout {
  display: flex;
  align-items: center;
  gap: 14px;
}

.matrix-length-label {
  color: rgba(255, 255, 255, 0.5);
  font-size: 12px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.matrix-length-value {
  color: #fff;
  font-family: "SF Mono", ui-monospace, Menlo, monospace;
  font-size: 20px;
  font-weight: 600;
  min-width: 52px;
  text-align: right;
}

.matrix-length-ticks {
  display: flex;
  gap: 6px;
}

.matrix-length-ticks span {
  color: rgba(255, 255, 255, 0.4);
  font-size: 12px;
  font-weight: 600;
  padding: 3px 10px;
  border-radius: 980px;
  background: rgba(255, 255, 255, 0.06);
  transition: background 0.3s ease, color 0.3s ease;
}

.matrix-length-ticks span.active {
  background: rgba(10, 132, 255, 0.22);
  color: #fff;
}

.matrix-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
}

.matrix-card {
  padding: 22px;
  border-radius: 20px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.1);
  text-align: center;
}

.matrix-canvas {
  display: block;
  width: 100%;
  max-width: 240px;
  aspect-ratio: 1;
  height: auto;
  margin: 0 auto 18px;
}

.matrix-card-title {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  margin-bottom: 10px;
}

.matrix-card-title span {
  display: inline-flex;
  align-items: center;
  height: 26px;
  padding: 0 11px;
  border-radius: 980px;
  font-size: 12px;
  font-weight: 700;
  background: rgba(255, 255, 255, 0.1);
  color: rgba(255, 255, 255, 0.8);
}

.matrix-card-title h4 {
  color: #fff;
  font-size: 17px;
  font-weight: 600;
}

.matrix-rule {
  font-family: "SF Mono", ui-monospace, Menlo, monospace;
  font-size: 13px;
  color: rgba(255, 255, 255, 0.85);
  margin-bottom: 4px;
}

.matrix-rule em {
  font-style: normal;
  color: rgba(255, 255, 255, 0.45);
}

.matrix-readout {
  font-size: 13px;
  color: var(--apple-blue-dark);
  font-weight: 600;
  font-variant-numeric: tabular-nums;
}

.matrix-stage-note {
  margin-top: 24px;
  color: rgba(255, 255, 255, 0.52);
  font-size: 13px;
  line-height: 1.55;
  max-width: 760px;
}

.method-grid,
.results-summary {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: 48px;
}

.method-card,
.metric-card {
  border-radius: 20px;
  padding: 32px;
  transition: transform 0.3s ease, box-shadow 0.3s ease, background 0.3s ease;
}

.method-card,
.metric-card {
  background: #fff;
  box-shadow: 0 2px 20px rgba(0, 0, 0, 0.04);
}

.method-card:hover,
.metric-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 40px rgba(0, 0, 0, 0.08);
}

.method-icon {
  width: 52px;
  height: 52px;
  border-radius: 12px;
  background: var(--apple-light-gray);
  color: var(--apple-black);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
  margin-bottom: 20px;
}

.method-card h3 {
  font-size: 19px;
  font-weight: 600;
  margin-bottom: 10px;
}

.method-card p,
.metric-card p {
  color: var(--apple-gray);
  font-size: 15px;
  line-height: 1.55;
}

.calibration-layout {
  display: block;
}

.calibration-topline {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 24px;
  align-items: stretch;
  margin-bottom: 28px;
}

.calibration-copy {
  display: grid;
  grid-template-rows: repeat(2, minmax(0, 1fr));
  gap: 12px;
  height: 100%;
}

.calibration-ingredients {
  display: grid;
  grid-template-columns: 1fr;
  grid-template-rows: repeat(3, minmax(0, 1fr));
  gap: 12px;
  height: 100%;
  margin-bottom: 0;
}

.ingredient-card {
  display: flex;
  align-items: center;
  gap: 14px;
  background: #fff;
  border-radius: 16px;
  padding: 18px 20px;
  box-shadow: 0 2px 20px rgba(0, 0, 0, 0.04);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.ingredient-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 40px rgba(0, 0, 0, 0.08);
}

.ingredient-icon {
  width: 38px;
  height: 38px;
  border-radius: 10px;
  background: var(--apple-light-gray);
  color: var(--apple-black);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
  margin-bottom: 0;
  flex-shrink: 0;
}

.ingredient-card h3,
.calibration-comparison h3 {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 4px;
}

.ingredient-card p,
.calibration-comparison p {
  color: var(--apple-gray);
  font-size: 14px;
  line-height: 1.45;
}

.calibration-comparison {
  display: flex;
  flex-direction: column;
  justify-content: center;
  background: #fff;
  border-radius: 16px;
  padding: 18px 20px;
  box-shadow: 0 2px 20px rgba(0, 0, 0, 0.04);
  border: 1px solid rgba(0, 0, 0, 0.04);
}

.calibration-comparison.strong {
  background: var(--moa-gradient-soft);
  border-color: rgba(102, 126, 234, 0.18);
}

.comparison-label {
  color: var(--apple-blue) !important;
  font-size: 12px !important;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  margin-bottom: 8px;
}

.comparison-metric {
  margin-top: 10px;
  font-size: 18px;
  font-weight: 700;
  letter-spacing: -0.02em;
  background: var(--moa-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.calibration-figure {
  margin-top: 0;
}

.metric-card {
  text-align: center;
}

.metric-card.compact {
  text-align: left;
  padding: 28px;
}

.metric-value {
  font-size: 42px;
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -0.03em;
  background: var(--moa-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 10px;
}

.metric-label {
  color: var(--apple-gray);
  font-size: 14px;
  line-height: 1.5;
}

/* Expandable result sections */
.expandable-section {
  margin: 24px 0;
  border-radius: 16px;
  overflow: hidden;
  background: #fff;
  box-shadow: 0 2px 20px rgba(0, 0, 0, 0.04);
  transition: box-shadow 0.4s var(--ease);
}

.expandable-section:hover {
  box-shadow: 0 4px 30px rgba(0, 0, 0, 0.08);
}

.expandable-section.open {
  box-shadow: 0 8px 40px rgba(0, 0, 0, 0.1);
}

.expandable-header {
  padding: 24px 32px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  cursor: pointer;
  transition: all 0.3s var(--ease);
  position: relative;
}

.expandable-header::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 0;
  background: var(--moa-gradient);
  transition: width 0.4s var(--ease);
  opacity: 0.1;
}

.expandable-title {
  font-size: 17px;
  font-weight: 600;
  transition: transform 0.3s var(--ease);
}

.expandable-icon {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: var(--apple-light-gray);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.4s var(--spring);
  flex-shrink: 0;
}

.expandable-icon i {
  font-size: 12px;
  color: var(--apple-black);
}

.expandable-section.open .expandable-icon {
  transform: rotate(45deg);
  background: var(--moa-gradient);
}

.expandable-section.open .expandable-icon i {
  color: #fff;
}

.expandable-content {
  display: grid;
  grid-template-rows: 0fr;
  transition: grid-template-rows 0.5s var(--ease);
}

.expandable-inner {
  padding: 0 32px 32px;
  opacity: 0;
  transform: translateY(-10px);
  transition: opacity 0.4s var(--ease) 0.1s, transform 0.4s var(--ease) 0.1s;
}

.expandable-inner p {
  color: #444;
  font-size: 16px;
  line-height: 1.6;
  max-width: 760px;
  margin: 0 auto;
}

.expandable-inner .figure-panel {
  margin-top: 28px;
}

/* Demo */
.demo-layout {
  grid-template-columns: 0.9fr 1.1fr;
}

.demo-point span {
  width: 38px;
  height: 38px;
  border-radius: 50%;
  background: #fff;
  color: var(--apple-blue);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 13px;
  font-weight: 700;
  box-shadow: 0 2px 18px rgba(0, 0, 0, 0.06);
  flex-shrink: 0;
}

.video-frame {
  overflow: hidden;
  border-radius: 20px;
  background: #fff;
  box-shadow: 0 8px 40px rgba(0, 0, 0, 0.08);
}

.video-frame video {
  display: block;
  width: 100%;
  height: auto;
}

/* Authors */
.authors-section {
  text-align: center;
  padding: 80px 0;
}

.affiliations {
  margin-top: 24px;
  font-size: 14px;
  color: var(--apple-gray);
}

/* BibTeX */

/* Footer */

@media (max-width: 980px) {

  .overview-grid,
.calibration-layout,
.demo-layout {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .overview-figure {
    order: -1;
  }

  .calibration-topline,
.calibration-ingredients,
.method-grid,
.results-summary {
    grid-template-columns: 1fr;
  }

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

  .matrix-canvas {
    max-width: 280px;
  }
}

@media (max-width: 768px) {
  :root {
    --section-padding: 80px 0;
  }

  .hero-stats {
    gap: 28px;
  }

  .stat-value {
    font-size: 44px;
  }

  .section-header {
    margin-bottom: 36px;
  }

  .expandable-header {
    padding: 20px 22px;
  }

  .expandable-inner {
    padding: 0 22px 24px;
  }
}

@media (max-width: 640px) {

  .hero {
    padding: 92px 18px 64px;
  }

  .hero-vignette {
    background: radial-gradient(
      ellipse 82% 70% at 50% 48%,
      rgba(255, 255, 255, 0.98) 0%,
      rgba(255, 255, 255, 0.92) 42%,
      rgba(255, 255, 255, 0.5) 72%,
      rgba(255, 255, 255, 0) 100%
    );
  }

  .hero-title {
    font-size: 56px;
  }

  .hero-subtitle,
.section-subtitle {
    font-size: 19px;
  }

  .hero-actions {
    width: 100%;
  }

  .hero-badge {
    width: 100%;
    max-width: 320px;
  }

  .metric-card,
.method-card,
.ingredient-card,
.matrix-stage,
.matrix-card {
    padding: 26px;
  }

  .matrix-stage-header {
    margin-bottom: 20px;
  }
}

@media (max-width: 420px) {
  .matrix-length-readout {
    width: 100%;
    min-width: 0;
    flex-wrap: wrap;
    gap: 8px 12px;
  }

  .matrix-length-ticks {
    width: 100%;
    flex-wrap: wrap;
  }

  .hero-title {
    font-size: 50px;
  }

  .section-title {
    font-size: 34px;
  }
}

/* Collapsed global navigation */

/* Keep project tiles consistent with the team hub. */