.proofline-video-error,.proofline-video-fallback,.proofline-video-player{width:100%;min-width:0}.proofline-video-player{position:relative;overflow:hidden;border:1px solid rgba(255,255,255,.76);border-radius:var(--radius-lg);background:linear-gradient(135deg,rgba(32,36,42,.98),rgba(15,18,24,.98)),#111318;box-shadow:0 24px 70px rgba(0,0,0,.18)}.proofline-video-player:focus-visible{outline:3px solid rgba(47,143,255,.24);outline-offset:3px}.proofline-video-controller{width:100%;aspect-ratio:16/9;display:block;overflow:hidden;--media-primary-color:#ffffff;--media-secondary-color:rgba(255,255,255,0.86);--media-accent-color:#30d158;--media-control-background:rgba(18,22,28,0.7);--media-control-hover-background:rgba(48,209,88,0.18);--media-range-track-background:rgba(255,255,255,0.22);--media-range-bar-color:#30d158;--media-time-range-buffered-color:rgba(255,255,255,0.38);--media-font-family:var(--font-sans)}.proofline-video-media{width:100%;height:100%;display:block;object-fit:contain;background:#090b0f}.proofline-video-control-bar{min-height:52px;gap:4px;padding:8px;border-top:1px solid rgba(255,255,255,.08);background:linear-gradient(180deg,rgba(20,24,30,.62),rgba(8,10,14,.88)),rgba(8,10,14,.86);-webkit-backdrop-filter:blur(16px) saturate(1.35);backdrop-filter:blur(16px) saturate(1.35)}.proofline-video-loading-indicator{color:#ffffff}.proofline-video-error,.proofline-video-overlay{position:absolute;inset:0;display:grid;place-content:center;grid-gap:10px;gap:10px;padding:24px;background:rgba(8,10,14,.72);color:#ffffff;text-align:center}.proofline-video-error{background:rgba(32,8,8,.82)}.proofline-video-error p,.proofline-video-overlay p{max-width:520px;color:rgba(255,255,255,.78)}.proofline-video-meta{display:flex;flex-wrap:wrap;justify-content:space-between;gap:8px;padding:10px 14px;background:rgba(255,255,255,.06);color:rgba(255,255,255,.76);font-size:12px;font-weight:750}.proofline-video-fallback{display:grid;place-items:center;min-height:320px;grid-gap:12px;gap:12px;border:1px dashed rgba(210,210,215,.74);border-radius:var(--radius-lg);padding:28px;background:linear-gradient(135deg,rgba(245,245,247,.86),rgba(255,255,255,.72)),rgba(255,255,255,.72);text-align:center}.proofline-video-fallback h2{max-width:620px}.proofline-video-fallback p{max-width:620px;color:var(--color-neutral-600)}.proofline-video-kicker{display:inline-flex;min-height:26px;align-items:center;justify-content:center;border-radius:var(--radius-full);padding:3px 10px;background:rgba(48,209,88,.14);color:var(--color-mint-700);font-size:12px;font-weight:900}.proofline-video-kicker.danger{background:rgba(255,239,238,.16);color:#ffb4ae}.proofline-video-legacy-placeholder{display:none}.student-video-card.has-player{gap:0;overflow:hidden;padding:0}.student-video-card.has-player .student-video-stage{min-height:0;overflow:hidden;border:0;border-radius:0;background:#090b0f}.student-video-card.has-player .proofline-video-player{border:0;border-radius:0;box-shadow:none}.student-video-card.has-player .student-watch-row{margin:14px}@media (max-width:720px){.proofline-video-controller{aspect-ratio:16/9}.proofline-video-control-bar{min-height:48px;overflow-x:auto}.proofline-video-fallback{min-height:240px;padding:20px}}