.youtube-card.youtube-card{background:var(--surface);border:1px solid var(--surface-line);border-radius:8px;flex-direction:column;min-width:0;height:100%;transition:border-color .16s,transform .16s,box-shadow .16s;display:flex;overflow:hidden}.youtube-card.youtube-card:hover{border-color:var(--accent);transform:translateY(-2px);box-shadow:0 8px 32px #0003}.youtube-card__poster.youtube-card__poster,.youtube-card__frame.youtube-card__frame{aspect-ratio:16/9;border:0;border-bottom:1px solid var(--surface-line);background:#090b0e;width:100%;position:relative;overflow:hidden}.youtube-card__poster.youtube-card__poster{cursor:pointer;padding:0;display:block}.youtube-card__poster.youtube-card__poster.youtube-card__poster img{object-fit:cover;object-position:center;width:100%;height:100%;transition:transform .18s,opacity .18s;display:block}.youtube-card.youtube-card.youtube-card.youtube-card:hover .youtube-card__poster 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7px;font-size:.7rem;line-height:1;position:absolute;bottom:10px;right:10px}.youtube-card__frame.youtube-card__frame.youtube-card__frame iframe,.youtube-card__frame iframe{border:0;width:100%;height:100%;display:block}.youtube-card__frame{aspect-ratio:16/9;border-bottom:1px solid var(--surface-line);background:#090b0e;width:100%;position:relative;overflow:hidden}.youtube-card__body.youtube-card__body{flex-direction:column;flex:1;padding:18px;display:flex}.youtube-card.youtube-card.youtube-card h3{margin:0;font-size:1.02rem;line-height:1.35}.breadcrumb.c4{border-bottom:1px solid var(--surface-line);padding:22px 0}.breadcrumb.c4 ol.c4{font-family:var(--font-mono);color:var(--text-dim);gap:9px;margin:0;padding:0;font-size:.78rem;list-style:none;display:flex}.breadcrumb.c4 a.c4:hover{color:var(--accent)}.kb-hero.c4{border-bottom:1px solid var(--surface-line);padding:72px 0 56px}.kb-hero__inner.c4{grid-template-columns:minmax(0,1fr) auto;align-items:end;gap:36px;display:grid}.kb-hero.c4 h1.c4{margin-bottom:14px}.kb-hero__lede.c4{max-width:58ch;font-size:1.02rem}.kb-stats.c4{border:1px solid var(--surface-line);background:var(--surface-line);border-radius:8px;grid-template-columns:repeat(3,minmax(86px,1fr));gap:1px;display:grid;overflow:hidden}.kb-stats.c4 div.c4{background:var(--surface);padding:16px 18px}.kb-stats.c4 strong.c4{color:var(--accent);font-family:var(--font-display);font-size:1.55rem;line-height:1;display:block}.kb-stats.c4 span.c4,.kb-count.c4,.youtube-group__head.c4>span.c4{color:var(--text-dim);font-family:var(--font-mono);margin-top:5px;font-size:.72rem;display:block}.kb-listing.c4{padding-top:34px}.kb-toolbar.c4{grid-template-columns:minmax(240px,1fr) minmax(170px,220px) minmax(240px,360px);align-items:end;gap:14px;margin-bottom:16px;display:grid}.kb-search.c4,.kb-select.c4{gap:8px;display:grid}.kb-search.c4 span.c4,.kb-select.c4 span.c4{color:var(--text-dim);font-family:var(--font-mono);font-size:.76rem}.kb-search.c4 input.c4,.kb-select.c4 select.c4{width:100%;min-height:48px;color:var(--text);font:inherit;background:var(--surface);border:1px solid var(--surface-line);border-radius:8px;padding:0 14px}.kb-search.c4 input.c4::placeholder{color:var(--text-dim)}.kb-count.c4{margin:0 0 30px}.kb-empty.c4{color:var(--text-dim);font-family:var(--font-mono);background:var(--surface);border:1px solid var(--surface-line);border-radius:8px;margin:0 0 30px;padding:24px;font-size:.84rem}.kb-empty.c4[hidden]{display:none}.youtube-group.c4{padding-top:8px}.youtube-group.c4+.youtube-group.c4{border-top:1px solid var(--surface-line);margin-top:54px;padding-top:54px}.youtube-group.c4[hidden],.youtube-item.c4[hidden]{display:none}.youtube-group__head.c4{justify-content:space-between;align-items:end;gap:24px;margin-bottom:28px;display:flex}.youtube-group__head.c4 h2.c4{margin-bottom:0}.youtube-grid.c4{grid-template-columns:repeat(3,minmax(0,1fr));gap:18px;display:grid}.youtube-item.c4{min-width:0}@media (width<=980px){.kb-hero__inner.c4,.kb-toolbar.c4{grid-template-columns:1fr}.kb-stats.c4,.youtube-grid.c4{grid-template-columns:repeat(2,minmax(0,1fr))}}@media (width<=680px){.kb-hero.c4{padding:56px 0 42px}.kb-stats.c4,.youtube-grid.c4{grid-template-columns:1fr}.youtube-group__head.c4{flex-direction:column;align-items:flex-start}}