:root{color-scheme:light;--bg:#fafafa;--paper:#fff;--ink:#191b1f;--muted:#686b72;--line:#dedfe2;--soft:#f3f3f5;--red:#d93338}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--ink);font:16px/1.6 'Segoe UI',Arial,sans-serif}body.dark{color-scheme:dark;--bg:#141517;--paper:#1b1d20;--ink:#f1f1f3;--muted:#a4a7af;--line:#36383e;--soft:#232529;--red:#ff5a60}button,input,textarea{font:inherit}button,a,input{touch-action:manipulation}button{cursor:pointer}button:disabled{opacity:.45;cursor:default}button:focus-visible,a:focus-visible,input:focus-visible,summary:focus-visible,textarea:focus-visible{outline:2px solid var(--red);outline-offset:4px}button{color:inherit}header,main,footer{max-width:1120px;margin:auto}header{height:100px;display:flex;align-items:center;gap:24px;border-bottom:1px solid var(--line)}.brand{font-size:36px;font-weight:750;letter-spacing:-2px;text-decoration:none;color:var(--ink)}.brand-dot,.brand>span:first-child{color:var(--red)}.descriptor,.eyebrow,small{font-size:12px;letter-spacing:1.7px;font-weight:600}.descriptor{color:var(--muted)}header button{margin-left:auto}.quiet{background:transparent;border:0;padding:8px 10px;border-radius:6px;font-size:14px}.quiet:hover{background:var(--soft)}.intro{display:flex;justify-content:space-between;align-items:center;margin:42px 0 30px;gap:20px}.eyebrow{color:var(--muted);margin:0 0 10px}h1{font-size:36px;font-weight:550;letter-spacing:-1.5px;line-height:1.2;margin:0}.intro>p{color:var(--muted);font-size:14px}.tool{background:var(--paper);border:1px solid var(--line);border-radius:12px;overflow:hidden}.input-head{display:flex;justify-content:space-between;align-items:center;margin:14px 24px 6px}.input-head label{font-size:14px;font-weight:600}textarea{display:block;width:calc(100% - 48px);height:106px;resize:vertical;min-height:90px;max-height:420px;margin:0 24px;border:0;background:var(--paper);color:var(--ink);padding:8px 0;line-height:1.7}textarea::placeholder{color:var(--muted)}.input-foot{padding:10px 24px 18px;display:flex;justify-content:space-between;gap:12px;color:var(--muted);font-size:12px;border-bottom:1px solid var(--line)}#reader{background:var(--paper)}.stage-head{display:flex;justify-content:space-between;align-items:center;padding:15px 24px 0;color:var(--muted);font-size:11px;letter-spacing:1.5px}#stage{position:relative;display:block;border:0;background:transparent;color:var(--ink);height:228px;width:100%;padding:0;overflow:hidden;cursor:pointer}#word{position:absolute;left:50%;top:50%;font-family:Consolas,'Courier New',monospace;font-weight:500;font-size:64px;line-height:1.2;white-space:pre;direction:ltr;transform:translate(-50%,-50%);width:1ch}#anchor{color:var(--red);display:inline-block;width:1ch;text-align:center}#before{position:absolute;right:100%;top:0}#after{position:absolute;left:100%;top:0}.guide{position:absolute;left:50%;width:1px;height:21px;background:var(--line)}.guide.top{top:15px}.guide.bottom{bottom:15px}.stage-foot{display:flex;justify-content:space-between;padding:0 24px 18px;font-size:12px;color:var(--muted);gap:12px}progress{display:block;width:100%;height:3px;border:0;background:var(--soft);color:var(--red)}progress::-webkit-progress-bar{background:var(--soft)}progress::-webkit-progress-value{background:var(--red)}progress::-moz-progress-bar{background:var(--red)}.controls{display:flex;align-items:center;justify-content:space-between;padding:24px;gap:24px}.transport{display:flex;align-items:center;gap:8px}.primary{display:flex;align-items:center;justify-content:space-between;gap:28px;min-width:185px;border:0;border-radius:7px;background:var(--ink);color:var(--paper);padding:12px 18px;font-size:14px;font-weight:600}.primary:hover{opacity:.85}.speed{display:flex;align-items:center;gap:8px;font-size:12px;color:var(--muted)}.speed label{font-size:11px;letter-spacing:1.2px}.speed input[type=number]{width:69px;border:0;border-bottom:1px solid var(--line);background:transparent;color:var(--ink);font-size:21px;font-weight:600;padding:0;text-align:center;-moz-appearance:textfield}.speed input::-webkit-inner-spin-button{appearance:none}.speed input[type=range]{width:130px;margin-left:8px;accent-color:var(--ink)}.options{padding:0 24px 22px;display:flex;align-items:center;gap:12px;color:var(--muted);font-size:12px}.options label{display:flex;align-items:center;gap:6px;white-space:nowrap}.options input{accent-color:var(--ink);width:15px;height:15px}.keyboard{margin-left:auto;font-size:11px}kbd{font:11px 'Segoe UI',sans-serif;border:1px solid var(--line);border-radius:3px;padding:1px 4px}.explain{display:grid;grid-template-columns:1fr 1.6fr;gap:70px;padding:64px 0;border-bottom:1px solid var(--line)}h2{font-size:28px;line-height:1.3;font-weight:550;letter-spacing:-.7px;margin:0}.explain p{margin-top:0}.explain>div>p{max-width:660px}.comparison{display:grid;grid-template-columns:1fr 1fr;gap:24px;margin:30px 0}.comparison>div{border-left:1px solid var(--line);padding-left:20px}.comparison small{font-size:10px;color:var(--muted)}.comparison p{font-family:Consolas,monospace;font-size:21px;margin:14px 0 8px}.comparison span{font-size:12px;color:var(--muted)}.fixed-demo span{font-size:inherit;color:var(--red)}.line-demo{text-decoration:underline;text-decoration-color:var(--line);text-underline-offset:9px}.secondary{color:var(--muted);font-size:14px}.takeaway{border-left:2px solid var(--red);padding-left:20px;margin-top:24px!important}details{margin-top:28px;font-size:14px}summary{cursor:pointer;font-weight:600}summary span{float:right;color:var(--muted);font-weight:400}li{margin:12px 0}a{color:inherit;text-underline-offset:3px}.video{display:flex;align-items:center;gap:24px;padding:32px 0;text-decoration:none}.video-play{display:grid;place-items:center;width:65px;height:65px;border:1px solid var(--line);border-radius:50%;flex-shrink:0}.video small{font-size:10px;color:var(--muted)}.video h2{font-size:23px;margin:5px 0}.video p{color:var(--muted);font-size:14px;margin:0}.video-arrow{margin-left:auto;font-size:30px}.video:hover h2{text-decoration:underline}footer{display:flex;align-items:center;gap:24px;padding:24px 0 36px;border-top:1px solid var(--line);font-size:12px;color:var(--muted)}footer .brand{font-size:26px}footer span:last-child{margin-left:auto}#reader:fullscreen{display:flex;flex-direction:column;justify-content:center;padding:4vw}#reader:fullscreen #stage{height:55vh}#reader:fullscreen #word{font-size:72px}@media(max-width:1180px){header,main,footer{margin-left:32px;margin-right:32px}}@media(max-width:850px){.controls{flex-wrap:wrap}.speed{flex:1;justify-content:flex-end}.speed input[type=range]{flex:1;max-width:230px}.keyboard{display:none}.explain{gap:30px}.intro>p{display:none}}@media(max-width:600px){header,main,footer{margin-left:18px;margin-right:18px}header{height:76px;gap:14px}.descriptor{font-size:9px;letter-spacing:1px}.brand{font-size:30px}.intro{margin:28px 0 24px}h1{font-size:29px}.eyebrow{font-size:10px}header .quiet{font-size:12px;padding:6px}.input-head{margin:12px 16px 6px}textarea{margin:0 16px;width:calc(100% - 32px);height:100px}.input-foot{padding:8px 16px 15px;flex-direction:column;gap:4px}.stage-head{padding:10px 16px 0}#stage{height:210px}#word{font-size:48px}.stage-foot{padding:0 16px 14px;font-size:11px}.controls{padding:18px 12px;gap:22px}.transport{width:100%;gap:3px;justify-content:space-between}.primary{min-width:144px;padding:12px;gap:8px}.transport .quiet{padding:8px 6px;font-size:12px}.speed{justify-content:flex-start;padding:0 8px}.speed input[type=range]{max-width:none}.options{padding:0 16px 20px;gap:8px;flex-wrap:wrap}#hint{font-size:11px}.explain{grid-template-columns:1fr;gap:24px;padding:40px 0}h2{font-size:26px}.comparison{gap:12px}.comparison>div{padding-left:12px}.comparison p{font-size:16px}.video{gap:16px}.video-play{width:45px;height:45px}.video h2{font-size:20px}.video-arrow{display:none}footer{flex-wrap:wrap;gap:12px}footer span:last-child{width:100%;margin:0}}
.limit-notice{display:flex;align-items:center;justify-content:space-between;gap:18px;padding:16px 24px;background:var(--soft);border-bottom:1px solid var(--line);font-size:13px}.limit-notice[hidden],[hidden]{display:none!important}.limit-notice p{margin:2px 0;color:var(--muted)}.limit-notice .primary{font-size:13px;min-width:0;padding:10px 14px}.account-dialog{width:min(480px,calc(100% - 32px));border:1px solid var(--line);border-radius:12px;padding:28px;background:var(--paper);color:var(--ink);box-shadow:0 24px 80px #0004}.account-dialog::backdrop{background:#0006}.account-dialog .close-account{float:right}.account-dialog h2{clear:both}.account-dialog .small{font-size:12px;color:var(--muted)}.account-dialog #account-email{font-weight:600;overflow-wrap:anywhere}.account-dialog .upgrade{display:inline-block;background:var(--ink);color:var(--paper);border-radius:6px;padding:10px 16px;text-decoration:none}.account-dialog #refresh-account{display:block;margin-top:16px}#account-button{margin-left:auto}header #theme{margin-left:0}@media(max-width:600px){.limit-notice{align-items:flex-start;flex-direction:column;padding:14px 16px}header{gap:12px}#account-button{font-size:12px}.account-dialog{padding:20px}}

.account-dialog .secondary-plan{display:inline-flex;align-items:center;justify-content:center;border:1px solid var(--line);border-radius:6px;background:var(--soft);color:var(--ink);font-size:14px;font-weight:600;padding:12px 16px;min-height:48px;margin-top:10px}.account-dialog .secondary-plan:hover{background:var(--line)}.account-dialog #plans>.primary,.account-dialog #plans>.secondary-plan{width:100%}.account-dialog #refresh-account{border:1px solid var(--line);border-radius:6px;padding:9px 14px;background:var(--soft)}

.google-login{display:flex;align-items:center;justify-content:center;gap:12px;width:100%;min-height:48px;padding:12px;border:1px solid var(--line);border-radius:6px;background:var(--paper);color:var(--ink);font-weight:600}.google-login span{font-size:20px;font-weight:700;color:#4285f4}.login-divider{text-align:center;color:var(--muted);font-size:13px}#email-login-form label{display:block;font-size:13px;font-weight:600}#login-email{display:block;width:100%;padding:10px 12px;margin:5px 0 12px;border:1px solid var(--line);border-radius:6px;background:var(--paper);color:var(--ink)}#email-login-form .primary{width:100%;justify-content:center}#signout{border:1px solid var(--line);border-radius:6px}
.google-mark{width:20px;height:20px;display:block;flex:none}.plan-actions{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin-top:10px}.plan-button{display:flex;align-items:center;justify-content:center;width:100%;min-height:48px;padding:12px 14px;border:1px solid var(--line);border-radius:7px;font-size:14px;font-weight:600;cursor:pointer}.plan-button-primary{background:var(--ink);color:var(--paper);border-color:var(--ink)}.plan-button-primary:hover{opacity:.85}.plan-button-secondary{background:var(--soft);color:var(--ink)}.plan-button-secondary:hover{background:var(--line)}.account-dialog #plans>.plan-button{width:100%}@media(max-width:420px){.plan-actions{grid-template-columns:1fr}}