.heart-feature { padding: 72px 22px 32px; border-top: 1px solid var(--line); background: #0a0809; text-align: center; }
.heart-heading { max-width: 680px; margin: auto; }
.heart-heading h2 { font-size: 3.5rem; letter-spacing: 0; line-height: 1.08; }
.heart-heading > p:last-child { color: #bfb4ba; font-size: 1rem; }
.heart-stage { position: relative; width: min(100%, 1000px); height: 560px; margin: auto; }
.heart-stage canvas { display: block; width: 100%; height: 100%; opacity: 0; touch-action: pan-y; cursor: grab; }
.heart-stage canvas:active { cursor: grabbing; }
.heart-stage.is-ready canvas { opacity: 1; }
.heart-stage.is-ready .heart-fallback { display: none; }
.heart-fallback { position: absolute; inset: 20px 0 65px; margin: auto; width: 100%; height: calc(100% - 85px); object-fit: contain; }
.heart-controls { position: absolute; bottom: 14px; left: 50%; transform: translateX(-50%); display: flex; gap: 8px; }
.heart-controls[hidden], .heart-error[hidden] { display: none; }
.heart-controls button { width: 44px; height: 44px; border: 1px solid #66545d; border-radius: 4px; background: #191317; color: #fff; font: 24px/1 sans-serif; cursor: pointer; }
.heart-controls button:hover { background: #67213c; }
.heart-controls button:focus-visible, #heart-canvas:focus-visible { outline: 2px solid var(--soft); outline-offset: 3px; }
.heart-error { position: absolute; bottom: 0; left: 0; right: 0; font-size: .875rem; color: #c9c2c5; }
@media (max-width: 560px) {
  .heart-feature { padding-top: 50px; }
  .heart-heading h2 { font-size: 2.5rem; }
  .heart-stage { height: 440px; }
}
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } .marquee div { animation: none; } }