// animation loop (requestAnimationFrame) let lastFrameTime = 0; function startAnimation() if (animationId) cancelAnimationFrame(animationId); function animate(now) if (!isPlaying) return; if (lastFrameTime === 0) lastFrameTime = now; let delta = Math.min(100, now - lastFrameTime); if (delta > 0) let step = delta * 1.0; // 1x speed, can modify let newTime = currentTime + step; if (newTime >= totalDuration) newTime = totalDuration; setCurrentTime(newTime); isPlaying = false; playPauseBtn.innerHTML = '▶ PLAY'; cancelAnimationFrame(animationId); animationId = null; lastFrameTime = 0; return;
.playback-buttons button background: #1f2a3e; border: none; color: white; padding: 8px 18px; border-radius: 40px; font-weight: bold; cursor: pointer; transition: 0.1s linear; font-family: inherit; backdrop-filter: blur(4px); box-shadow: 0 2px 6px rgba(0,0,0,0.3); osu replay viewer
