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a{color:var(--color-link);text-decoration:none;font-weight:500}.footnote-popup__text a:hover{color:var(--color-link-hover)}@media(max-width:768px){.footnote-popup{padding:.875rem 1rem}.footnote-popup__content{gap:.75rem}.footnote-popup__text{font-size:var(--font-size-xs)}}.video-sync-observer{position:absolute;top:0;left:0;width:100%;height:1px;pointer-events:none}.video-sync-player{position:relative;margin-bottom:2rem;max-width:42rem;aspect-ratio:16 / 9}.video-sync-placeholder{display:flex;align-items:center;justify-content:center;height:100%;min-height:200px;background-color:var(--color-bg-subtle);border:1px dashed var(--color-border);border-radius:var(--radius-md);color:var(--color-text-lighter);font-family:var(--font-sans);font-size:var(--font-size-sm)}.video-sync-frame{border-radius:var(--radius-md);overflow:hidden}.video-sync-frame.is-loaded{box-shadow:var(--shadow-md)}.video-sync-frame.is-sticky{position:fixed;bottom:1rem;right:1rem;width:280px;z-index:100;box-shadow:0 4px 24px #00000040;background:#000}.video-sync-frame__wrapper{position:relative;padding-top:56.25%}.video-sync-frame__wrapper iframe{position:absolute;top:0;left:0;width:100%;height:100%;border:none}.video-sync-frame__controls{position:absolute;top:.5rem;right:.5rem;display:flex;gap:.35rem;z-index:10}.video-sync-frame.is-sticky .video-sync-frame__controls{position:static;justify-content:center;padding:.5rem;background:#000000b3}.video-sync-toggle{display:flex;align-items:center;gap:.35rem;font-family:var(--font-sans);font-size:var(--font-size-xs);font-weight:500;padding:.4rem .6rem;background:#000000b3;border:none;border-radius:var(--radius-sm);color:#fff;cursor:pointer;transition:background .15s}.video-sync-toggle:hover{background:#000000d9}.video-sync-toggle.is-active{background:var(--color-primary)}.video-sync-toggle.is-active:hover{background:var(--color-link-hover)}.video-sync-toggle__label{white-space:nowrap}.video-sync-active{background-color:var(--highlight-ai);transition:background-color .3s ease;scroll-margin-top:6rem}h2.video-sync-active,h3.video-sync-active{margin-left:-.5rem;margin-right:-.5rem;padding-left:.5rem;padding-right:.5rem;border-radius:var(--radius-sm)}[data-sync]{transition:background-color .3s ease;border-radius:2px;padding:0 2px;margin:0 -2px}[data-sync].video-sync-active{background-color:var(--highlight-ai)}.video-sync-arrow{position:fixed;left:50%;transform:translate(-50%);display:flex;align-items:center;gap:.5rem;padding:.75rem 1.25rem;background:var(--color-primary);color:#fff;border:none;border-radius:var(--radius-lg);font-family:var(--font-sans);font-size:var(--font-size-sm);font-weight:600;cursor:pointer;z-index:90;box-shadow:0 4px 20px #00000040;transition:background .15s,transform .15s}.video-sync-arrow:hover{background:var(--color-link-hover)}.video-sync-arrow--down{bottom:5rem;animation:video-sync-bounce-down 1s ease-in-out infinite}.video-sync-arrow--up{top:5rem;animation:video-sync-bounce-up 1s ease-in-out infinite}.video-sync-arrow svg{flex-shrink:0}@keyframes video-sync-bounce-down{0%,to{transform:translate(-50%) translateY(0)}50%{transform:translate(-50%) translateY(6px)}}@keyframes video-sync-bounce-up{0%,to{transform:translate(-50%) translateY(0)}50%{transform:translate(-50%) translateY(-6px)}}@media(max-width:768px){.video-sync-frame.is-sticky{width:100%;bottom:0;right:0;left:0;border-radius:0;box-shadow:0 -4px 20px #00000026}.video-sync-frame.is-sticky .video-sync-frame__wrapper{height:0;padding-top:0;overflow:hidden}.video-sync-frame.is-sticky .video-sync-frame__wrapper iframe{position:absolute;height:1px;width:1px;overflow:hidden;clip:rect(1px,1px,1px,1px)}.video-sync-frame.is-sticky .video-sync-frame__controls{padding:.75rem 1rem;border-radius:0}.video-sync-arrow--down{bottom:4rem}}