:root{color-scheme:dark;font-family:system-ui,sans-serif;background:#10171e;color:#eef4fb}body{margin:0}main{max-width:1030px;margin:0 auto;padding:16px}h1{font-size:22px;margin:8px 0 16px}canvas{display:block;width:100%;height:auto;background:#000;border-radius:8px}button{padding:13px 18px;margin:8px 8px 0 0;border:0;border-radius:8px;background:#83b9ff;color:#08213d;font-size:15px}#stop{background:#343f4c;color:#fff}.note{font-size:13px;color:#aebecd;line-height:1.6}#status{min-height:24px;color:#a9dcff}