.research-population {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  margin: 0 0 72px;
  border: 1px solid #252525;
  background: #0b0b0b;
  scroll-margin-top: 84px;
}
.research-population::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  background: linear-gradient(90deg, #ffffff09 1px, transparent 1px), linear-gradient(#ffffff09 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: linear-gradient(transparent, #000 24%);
}
.research-population-heading {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 32px;
  padding: 46px 36px 34px;
}
.research-population-heading h2 {
  margin: 18px 0 20px;
  font-size: clamp(26px, 3vw, 37px);
  line-height: 1.25;
  letter-spacing: -.035em;
  font-weight: 500;
}
.research-population-heading h2 > span { display: block; }
.research-population-heading h2 > span:last-child { color: #949494; }
.research-population-heading .ap-button { flex-shrink: 0; margin-bottom: 3px; }
.research-population-heading .ap-copy { font-size: 15px; }
.research-population-stages {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  padding: 0;
  margin: 0 36px;
  list-style: none;
  border: 1px solid #292929;
  background: #101010;
}
.research-population-stages li { min-width: 0; padding: 20px 18px 22px; }
.research-population-stages li + li { border-left: 1px solid #292929; }
.research-population-stages li:nth-child(odd) { background: #161616; }
.research-population-number { display: block; font-size: 11px; color: #777; margin-bottom: 16px; }
.research-population-stages h3 { font-weight: 500; font-size: 14px; line-height: 1.5; margin: 0; letter-spacing: -.015em; }
.research-population-stages p { color: #969696; font-size: 12px; line-height: 1.65; margin: 7px 0 0; }
.research-population-visual { position: relative; height: clamp(300px, 47vw, 525px); margin: 0; overflow: hidden; }
.research-population-glow {
  position: absolute;
  width: 115%;
  height: 83%;
  left: -7.5%;
  bottom: -27%;
  border-radius: 50%;
  background: radial-gradient(ellipse at center, #a3a3a349, #80808015 48%, transparent 70%);
  filter: blur(35px);
  pointer-events: none;
}
.research-population-visual canvas { display: block; width: 100%; height: 100%; }
.research-population-controls {
  position: absolute;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  inset: 14px 36px auto;
}
.research-population-controls figcaption { font-size: 10px; line-height: 1.6; color: #929292; }
.research-population-pause {
  display: inline-flex;
  flex-shrink: 0;
  align-items: center;
  gap: 8px;
  min-height: 44px;
  padding: 0 12px;
  border: 1px solid transparent;
  border-radius: 7px;
  color: #aaa;
  font: inherit;
  font-size: 10px;
  cursor: pointer;
  background: #0b0b0bb3;
  transition: color 180ms, background 180ms, border-color 180ms;
}
.research-population-pause[hidden] { display: none; }
.research-population-pause:hover { color: #fff; border-color: #333; background: #181818; }
.research-population-pause:focus-visible { outline: 2px solid #eee; outline-offset: 3px; }
@media (max-width: 850px) {
  .research-population-heading { align-items: flex-start; flex-direction: column; gap: 25px; padding: 32px 26px; }
  .research-population-stages { grid-template-columns: repeat(2, minmax(0, 1fr)); margin: 0 26px; }
  .research-population-stages li:nth-child(3) { border-left: 0; }
  .research-population-stages li:nth-child(n+3) { border-top: 1px solid #292929; }
  .research-population-stages li:nth-child(odd) { background: transparent; }
  .research-population-stages li:first-child, .research-population-stages li:last-child { background: #161616; }
  .research-population-controls { inset-inline: 26px; }
}
@media (max-width: 479px) {
  .research-population { margin-bottom: 48px; }
  .research-population-heading { padding: 26px 18px; }
  .research-population-heading .ap-eyebrow { font-size: 9px; }
  .research-population-heading h2 { font-size: clamp(22px, 6.1vw, 28px); letter-spacing: -.04em; }
  .research-population-heading .ap-copy { font-size: 12px; line-height: 1.8; }
  .research-population-stages { margin: 0 18px; }
  .research-population-stages li { padding: 15px 12px; }
  .research-population-number { margin-bottom: 10px; }
  .research-population-stages h3 { font-size: 12px; }
  .research-population-stages p { font-size: 11px; }
  .research-population-visual { height: 210px; }
  .research-population-controls { inset: 10px 18px auto; align-items: flex-start; }
  .research-population-controls figcaption { padding-top: 7px; font-size: 9px; }
  .research-population-controls figcaption > span[aria-hidden] { display: none; }
  .research-population-controls figcaption > span:last-child { display: block; }
  .research-population-pause { padding-inline: 8px; font-size: 9px; gap: 5px; }
}
@media (prefers-reduced-motion: reduce) {
  .research-population-pause { transition: none; }
}