:root{color-scheme:light;--red:#ed4048;--ink:#20232c;--muted:#626976;--line:#e6e7eb;--soft:#f7f7f9;font-family:Inter,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI","Noto Sans JP",sans-serif;color:var(--ink);background:#fff}*{box-sizing:border-box}body{margin:0}a{color:inherit;text-underline-offset:4px}a:hover{color:var(--red)}.wrap{max-width:1120px;margin:auto;padding:0 30px}.header{height:88px;display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid var(--line)}.brand{font-size:18px;font-weight:800;letter-spacing:-.4px;text-decoration:none;display:flex;align-items:center;gap:12px}.mark{background:var(--red);color:white;border-radius:12px;width:34px;height:34px;display:grid;place-items:center;font-size:24px}nav{display:flex;align-items:center;gap:24px;font-size:14px}nav a{text-decoration:none}.hero{padding:84px 0 64px;display:grid;grid-template-columns:1.1fr 1fr;gap:64px;align-items:center}.eyebrow{font-size:12px;font-weight:750;letter-spacing:1.8px;color:var(--red);text-transform:uppercase;margin:0 0 22px}.badge{font-size:11px;letter-spacing:1px;background:#fff0f1;color:#bc2531;padding:7px 10px;border-radius:6px;margin-left:10px;white-space:nowrap}h1{font-size:clamp(34px,4vw,54px);font-weight:800;line-height:1.3;letter-spacing:-1.8px;margin:0 0 22px}html[lang=en] h1{font-size:clamp(40px,4.5vw,60px);line-height:1.08}.intro{font-size:16px;line-height:1.9;color:var(--muted);max-width:560px}.actions{display:flex;flex-wrap:wrap;gap:12px;margin:28px 0 18px}.button{display:inline-flex;justify-content:center;align-items:center;min-height:48px;padding:12px 20px;border-radius:9px;text-decoration:none;font-size:14px;font-weight:700;background:var(--red);border:1px solid var(--red);color:white}.button:hover{background:#d82e39;color:white}.button.secondary{background:white;color:var(--ink);border-color:var(--line)}.small{font-size:12px;color:var(--muted);line-height:1.8}.preview{background:#f3f4f7;border:1px solid var(--line);border-radius:16px;padding:22px;box-shadow:0 24px 70px -45px #525668}.preview-top{display:flex;gap:5px;margin-bottom:25px}.dot{width:7px;height:7px;border-radius:50%;background:#cccfd7}.block{background:#087f8c;border-radius:9px;padding:13px;color:white;font-size:13px;font-weight:700;display:flex;align-items:center;gap:10px;box-shadow:inset 0 -3px 0 #0002}.block-icon{background:#ffffff25;border-radius:4px;padding:4px 7px}.json{font-family:monospace;font-size:11px;background:white;color:#46515d;border-radius:12px;padding:5px 10px;overflow:hidden;white-space:nowrap}.mock-dialog{background:white;border:1px solid var(--line);border-radius:10px;margin:18px 0 0;padding:20px;box-shadow:0 8px 24px #22222209}.mock-title{font-size:13px;font-weight:750;margin:0 0 18px}.mock-label{font-size:11px;color:var(--muted);margin:12px 0 6px}.mock-input{border:1px solid var(--line);border-radius:6px;font-size:13px;padding:10px}.mock-footer{display:flex;justify-content:flex-end;gap:8px;margin-top:18px}.mock-footer span{padding:6px 12px;border:1px solid var(--line);border-radius:5px;font-size:11px}.mock-footer .save{background:var(--red);color:white;border-color:var(--red)}.caption{margin:15px 0 0;font-size:10px;color:var(--muted);text-align:center;letter-spacing:.4px}.section{padding:48px 0;border-top:1px solid var(--line)}h2{font-size:25px;letter-spacing:-.6px;margin:0 0 24px}.features{display:grid;grid-template-columns:repeat(3,1fr);gap:34px}.number{font-family:monospace;color:var(--red);font-size:12px}.features h3{font-size:16px;margin:14px 0 10px}.features p,.credits p,.steps{font-size:14px;color:var(--muted);line-height:1.9}.try{display:grid;grid-template-columns:1fr 1.25fr;gap:64px}.steps{margin:0;padding-left:22px}.steps li{padding-left:6px;margin-bottom:10px}.extension-url{display:flex;gap:8px;margin-top:18px}.extension-url input{width:100%;min-width:0;padding:11px;border:1px solid var(--line);border-radius:6px;color:var(--muted);background:var(--soft);font-family:monospace;font-size:11px}.extension-url button{border:1px solid var(--line);border-radius:6px;background:white;padding:8px 12px;cursor:pointer;white-space:nowrap}.credits{background:var(--soft);padding:28px;border-radius:12px}.credits h2{font-size:18px;margin-bottom:14px}.credits p{font-size:12px;margin:8px 0}.footer{display:flex;justify-content:space-between;gap:20px;padding:28px 0 36px;color:var(--muted);font-size:11px;line-height:1.8}.footer a{margin-left:12px}:focus-visible{outline:3px solid #4677d5;outline-offset:4px}.skip{position:absolute;left:20px;top:-60px}.skip:focus{top:12px;background:white;padding:10px;z-index:10}.notice{border-left:3px solid var(--red);padding-left:14px;font-size:12px;line-height:1.8;color:var(--muted)}@media(max-width:800px){.wrap{padding:0 22px}.header{height:76px}.brand{font-size:15px}nav{gap:14px}.hero{grid-template-columns:1fr;gap:40px;padding:52px 0 40px}.hero h1{max-width:600px}.features{grid-template-columns:1fr;gap:24px}.try{grid-template-columns:1fr;gap:20px}.footer{flex-direction:column;gap:8px}.footer a{margin:0 12px 0 0}}@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto}}

textarea[data-extension-source]{width:100%;height:160px;margin-top:10px;font-family:monospace;font-size:12px}textarea[data-extension-source][hidden]{display:none}

nav .source{display:inline-flex;align-items:center;justify-content:center;width:36px;height:36px;border-radius:8px;flex-shrink:0}
nav .source:hover{background:var(--soft)}
nav .source img{display:block}
@media(max-width:560px){.header{height:auto;min-height:76px;padding:16px 0;gap:14px;flex-wrap:wrap}nav{margin-left:auto}}

:root{color-scheme:light dark}
@media (prefers-color-scheme:dark){
  :root{--ink:#e7eaf2;--muted:#9aa6b8;--line:#2a313b;--soft:#1a1f27;background:#12141a}
}