.opt-lab-link,.opt-video,.opt-note{padding:20px;margin:22px 0;border:1px solid #3d647b;border-radius:14px;background:#0e293e}.opt-lab-link a,.opt-video a{color:#8ce8d0}.opt-videos>h3{margin-top:30px}.opt-video h4{margin:0 0 10px;font-size:1.1rem}.opt-player iframe{display:block;width:100%;aspect-ratio:16/9;border:0;margin-top:15px;border-radius:9px}.opt-videos button[hidden]{display:none!important}.mirror-words{display:flex;flex-wrap:wrap;gap:30px}.mirror-words b{display:inline-block;font:700 34px monospace;color:#ffe28a}.mirror-flip{transform:scaleX(-1)}.speed-lab label{display:block}.speed-lab input{display:block;width:100%;margin:18px 0}.speed-row{margin:22px 0}.speed-row strong{display:block}.speed-track{height:22px;background:#193a50;border-radius:12px;position:relative;margin:12px 8px 6px 0}.speed-track span{display:block;background:#62efc6;height:100%;border-radius:12px}.speed-track b{width:14px;height:30px;background:#ffe28a;position:absolute;top:-4px;transform:translateX(-50%);border-radius:4px}.speed-row output{font-variant-numeric:tabular-nums;color:#ffe28a}.speed-readout{padding:15px;border-left:3px solid #62efc6}
