*{margin:0;padding:0;box-sizing:border-box}html,body{width:100%;height:100%;overflow:hidden;background:#000}#canvas{width:100vw;height:100vh;display:block}#overlay{position:fixed;top:0;left:0;width:100%;height:100%;display:flex;align-items:center;justify-content:center;background:#000c;color:#fff;font-family:monospace;font-size:2rem;cursor:pointer;z-index:10;-webkit-user-select:none;user-select:none}#lyrics{position:fixed;bottom:6vh;left:50%;transform:translate(-50%);z-index:5;text-align:center;pointer-events:none;-webkit-user-select:none;user-select:none;width:90%;max-width:800px}#lyrics-ja{font-size:1.6rem;color:#fff;text-shadow:0 0 8px rgba(100,180,255,.8),0 0 20px rgba(100,180,255,.4),2px 2px 4px rgba(0,0,0,.9);font-family:Noto Sans JP,Hiragino Kaku Gothic Pro,Yu Gothic,sans-serif;margin-bottom:.4em;line-height:1.4;opacity:0;transition:opacity .3s ease}#lyrics-vi{font-size:1.1rem;color:#ffffffb3;text-shadow:0 0 6px rgba(100,180,255,.5),1px 1px 3px rgba(0,0,0,.9);font-family:Noto Sans,Arial,sans-serif;font-style:italic;line-height:1.4;opacity:0;transition:opacity .3s ease}#lyrics-ja.active,#lyrics-vi.active{opacity:1}