:root{color-scheme:light;--ink:#263d38;--muted:#626e68;--line:#cbd3c8;--paper:#f7f7ee;--white:#fffefa;--green:#205a46;--focus:#146bce}
*{box-sizing:border-box}body{margin:0;background:var(--paper);color:var(--ink);font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","Noto Sans JP","Yu Gothic",sans-serif;line-height:1.8}a{color:var(--green);text-underline-offset:4px}button,textarea,input{font:inherit}button,a,summary,input{touch-action:manipulation}button{background:var(--white);border:1px solid var(--line);border-radius:5px;padding:10px 17px;color:var(--ink);font-weight:600;cursor:pointer;line-height:1.6}button:hover:enabled{background:#edf2e7}button:disabled{opacity:.48;cursor:default}button:focus-visible,a:focus-visible,summary:focus-visible,input:focus-visible{outline:3px solid var(--focus);outline-offset:3px}.skip{position:absolute;top:-100px;left:12px;padding:8px;background:white;z-index:2}.skip:focus{top:8px}header{max-width:1180px;margin:auto;padding:20px 24px;border-bottom:1px solid var(--line);display:flex;align-items:center;justify-content:space-between;font-size:13px;color:var(--muted)}.brand{font-size:17px;letter-spacing:.05em;text-decoration:none;font-weight:700}main{max-width:1136px;margin:0 auto;padding:30px 24px 70px}.intro{padding:15px 0 29px}.eyebrow{font-size:13px;letter-spacing:.16em;margin:0 0 4px;color:var(--green)}h1{font-size:clamp(30px,5vw,44px);letter-spacing:.05em;margin:0 0 12px;font-weight:700}.intro>p:not(.eyebrow){margin:8px 0}.privacy-note{font-size:13px;color:var(--green);font-weight:600}.editor{border:1px solid var(--line);background:var(--white);padding:24px;border-radius:8px}.editor-top{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:18px}.editor-top p{margin:0;font-weight:700}.editor-top button{font-size:13px;padding:7px 13px}.inputs{display:grid;grid-template-columns:1fr 1fr;gap:22px}.input-panel{min-width:0}.input-panel>label{display:block;font-size:15px;font-weight:700;margin-bottom:10px}.number{display:inline-flex;align-items:center;justify-content:center;width:30px;height:28px;border-bottom:2px solid #73917d;margin-right:8px;color:var(--muted);font-size:12px;font-variant-numeric:tabular-nums}textarea{display:block;width:100%;min-height:235px;resize:vertical;border:1px solid #9aa99d;border-radius:4px;background:#fff;padding:14px;line-height:1.8;font-size:16px;color:#20342c;white-space:pre-wrap;overflow-wrap:anywhere}textarea:focus{outline:2px solid var(--green);outline-offset:2px}textarea[aria-invalid=true]{outline:2px solid #ad3830}.count{font-size:12px;color:var(--muted);text-align:right;margin:7px 0}.small{font-size:12px;color:var(--muted);margin:12px 0}.actions{display:flex;gap:9px;flex-wrap:wrap;margin-top:20px}.primary{background:var(--green);border-color:var(--green);color:white;padding-inline:23px}.primary:hover:enabled{background:#174733}.quiet{margin-left:auto;background:transparent;font-weight:400}.status{font-size:13px;margin:18px 0 0;min-height:1.8em;color:var(--green)}.results{margin:30px 0;border-top:2px solid var(--green);padding-top:20px}.result-head{display:flex;align-items:center;justify-content:space-between;gap:15px;flex-wrap:wrap}h2{font-size:21px;line-height:1.5;margin:0 0 15px}.result-head h2{margin:0}.check{font-size:13px;cursor:pointer}.check input{width:17px;height:17px;vertical-align:middle;margin-right:7px;accent-color:var(--green)}.legend{font-size:12px;margin:14px 0}.delete-key,.insert-key{display:inline-block;padding:1px 7px;border:1px solid;border-radius:3px;font-weight:700}.delete-key{color:#863624;border-color:#b97663;background:#fff0e9;text-decoration:line-through}.insert-key{color:#1c5743;border-color:#75a791;background:#e5f2e8;text-decoration:underline}.notice{background:#fff1cf;border-left:3px solid #a97520;padding:13px 16px;font-size:14px}.output{white-space:pre-wrap;overflow-wrap:anywhere;padding:23px;background:white;border:1px solid var(--line);border-radius:5px;font-size:16px;line-height:2.1;tab-size:4;max-height:650px;overflow:auto}.delete{background:#ffe5da;color:#752f22;text-decoration:line-through}.insert{background:#ddefdf;color:#174733;text-decoration:underline;text-underline-offset:3px}.change-label{display:inline-block;user-select:none;vertical-align:middle;font-size:10px;line-height:1.4;padding:1px 4px;margin:0 3px;border:1px solid currentColor;border-radius:2px;text-decoration:none;font-weight:700}.guide{margin-top:42px;padding:22px 0;border-top:1px solid var(--line)}.guide-grid{display:grid;grid-template-columns:1fr 1fr;gap:32px}.guide h3{font-size:16px;margin:0 0 8px}.guide p{font-size:14px;margin:0}.faq{margin-top:22px}.faq details{border-bottom:1px solid var(--line);padding:15px 0}.faq summary{font-size:15px;cursor:pointer;font-weight:600}.faq p{font-size:14px;max-width:860px;margin:12px 0 5px}footer{border-top:1px solid var(--line);max-width:1136px;margin:auto;padding:25px 24px;display:flex;gap:18px;flex-wrap:wrap;font-size:12px}footer small{margin-left:auto;color:var(--muted)}[hidden]{display:none!important}
@media(max-width:650px){header{padding:15px 18px}header>span{font-size:11px}main{padding:20px 14px 45px}.intro{padding-top:6px}.wide-only{display:none}.editor{padding:17px 14px}.inputs{grid-template-columns:1fr;gap:16px}textarea{min-height:170px}.actions{gap:8px}.primary{width:100%}.quiet{margin-left:0}button{font-size:14px;padding:10px 12px}.output{padding:16px;font-size:15px}.guide-grid{grid-template-columns:1fr;gap:20px}footer small{width:100%;margin:0}}