:root{font-family:-apple-system,BlinkMacSystemFont,"Hiragino Kaku Gothic ProN","Yu Gothic",sans-serif;color:#202b29;background:#f6f5f2;font-size:16px;line-height:1.75;--green:#175947;--border:#cdd4cd;--muted:#4d5d57}
*{box-sizing:border-box}body{margin:0}main{max-width:1120px;margin:auto;padding:36px 28px}header{margin-bottom:22px}.eyebrow{font-size:14px;letter-spacing:.03em;color:var(--green);font-weight:650}h1{font-size:clamp(30px,4vw,46px);line-height:1.3;letter-spacing:-.03em;margin:10px 0 16px}h2{font-size:20px;margin:0 0 14px}.intro{font-size:17px;color:var(--muted)}.small{display:none}.disclosure{padding:14px 18px;background:#e8ede7;border-left:3px solid var(--green);font-size:14px;margin:0 0 28px}.workspace{display:grid;grid-template-columns:1fr 1fr;gap:24px;align-items:stretch}.input-panel,.output-panel{background:#fff;padding:24px;border:1px solid var(--border);border-radius:8px;min-width:0}.number{display:inline-grid;place-items:center;background:#e7efe9;color:var(--green);width:30px;height:30px;border-radius:50%;font-size:16px;margin-right:8px}.hint{font-size:13px;color:var(--muted);margin:8px 0 12px}.examples{display:flex;gap:8px;flex-wrap:wrap;margin:16px 0}button,input,textarea{font:inherit}button{cursor:pointer;border:1px solid var(--border);background:#fff;color:#263d34;border-radius:6px;padding:9px 13px;min-height:44px}button:hover{background:#eef4ef}button:disabled{opacity:.5;cursor:not-allowed}button:focus-visible,input:focus-visible,textarea:focus-visible,summary:focus-visible{outline:3px solid #237ba3;outline-offset:3px}label{display:block;font-size:14px;font-weight:600;margin:10px 0 6px}input:not([type=checkbox]),textarea{width:100%;border:1px solid #8c9c94;border-radius:5px;padding:11px 12px;background:#fff;color:#202b29}textarea{resize:vertical;min-height:104px}.facts{padding:8px 0}details{border-top:1px solid var(--border);padding-top:12px;margin:18px 0}summary{cursor:pointer;font-size:14px;min-height:38px;font-weight:600}.primary{width:100%;background:var(--green);color:white;border-color:var(--green);font-weight:650;margin-top:10px}.primary:hover{background:#0d4334}.secondary{margin-top:10px;font-size:14px}.text-button{text-decoration:underline;border:0;padding-left:0;font-size:13px;background:transparent}#status,#review-status{font-size:14px;color:var(--green);min-height:25px}#empty{color:var(--muted);padding:45px 0 72px}.empty-title{font-size:22px;color:#34453d}.boundary{font-size:13px;padding-top:16px;border-top:1px solid var(--border);color:var(--muted)}#trace{padding-left:22px;font-size:13px;color:var(--muted);margin:0 0 24px}#trace li{padding:4px 0}.result-head{display:flex;justify-content:space-between;flex-wrap:wrap;gap:8px;align-items:center}#route{font-size:20px;color:var(--green)}#tag{font-size:12px;border:1px solid var(--border);padding:3px 7px;border-radius:4px}.answer{font-size:18px;line-height:1.9;background:#f0f5ef;padding:18px;margin:15px 0;overflow-wrap:anywhere}.review-label{font-size:14px;display:flex;gap:10px;align-items:flex-start;font-weight:400}.review-label input{margin-top:6px;flex-shrink:0;width:18px;height:18px}footer{margin-top:34px;max-width:800px;font-size:14px;color:var(--muted)}footer p{margin-top:7px}[hidden]{display:none!important}@media(max-width:680px){main{padding:24px 16px}.workspace{grid-template-columns:1fr;gap:18px}.input-panel,.output-panel{padding:20px}.small{display:block}.intro br{display:none}#empty{padding:18px 0 28px}.examples button{font-size:14px}.disclosure{padding:12px 14px}}