:root{color-scheme:light}*{box-sizing:border-box}body{margin:0;background:#f6f4ef;color:#222;font-family:-apple-system,BlinkMacSystemFont,Hiragino Sans,Noto Sans JP,sans-serif;line-height:1.7}main{max-width:720px;margin:0 auto;padding:24px 16px 80px}.card{background:#fff;border:1px solid #e3ded4;border-radius:12px;padding:20px;margin-bottom:16px}h1{font-size:1.3rem;margin:0 0 12px}h2{font-size:1.05rem;margin:0 0 8px}p{margin:8px 0}.note{font-size:.9rem;color:#555}.banner{border-radius:8px;padding:12px 14px;margin-bottom:16px}.banner.ok{background:#e7f6ec;border:1px solid #9fd7b1}.banner.warn{background:#fff7e0;border:1px solid #f0d78c}.banner.err{background:#fde8e8;border:1px solid #f3a6a6}.plans{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:8px}.plans label{border:1px solid #bbb;border-radius:999px;padding:6px 14px;cursor:pointer;background:#fff}.plans label.active{background:#1d4ed8;color:#fff;border-color:#1d4ed8}.plans input{display:none}.pair{display:grid;grid-template-columns:1fr auto 1fr;gap:8px;align-items:center;margin:8px 0}.pair .arrow{color:#888}select,textarea{width:100%;font-size:1rem;padding:8px;border:1px solid #bbb;border-radius:8px;background:#fff}textarea{min-height:260px;resize:vertical;line-height:1.6}.count{text-align:right;font-size:.85rem;color:#666}.count.over{color:#b00020;font-weight:600}ul.guide{margin:8px 0 8px 20px;padding:0}.actions{display:flex;gap:12px;align-items:center;flex-wrap:wrap;margin-top:16px}button.primary{font-size:1rem;padding:10px 22px;border:0;border-radius:8px;background:#1d4ed8;color:#fff;cursor:pointer}button.primary:disabled{background:#9db1e8;cursor:not-allowed}button.ghost{font-size:.95rem;padding:8px 14px;border:1px solid #bbb;border-radius:8px;background:#fff;cursor:pointer}.save{font-size:.85rem;color:#666}ul.errors{color:#b00020;margin:8px 0 0 20px}.readonly dt{font-weight:600;margin-top:8px}.readonly dd{margin:0 0 4px;white-space:pre-wrap}footer{font-size:.8rem;color:#777;margin-top:24px}@media (max-width: 480px){.pair{grid-template-columns:1fr}.pair .arrow{display:none}}