:root{--brand:#c8341f;--brand-dark:#9c2818;--ink:#1f2329;--muted:#6b7280;--line:#e5e7eb;--bg:#f6f5f3;--ok:#1c7a4a;--err:#b3261e}*{box-sizing:border-box}html,body{background:var(--bg);color:var(--ink);-webkit-font-smoothing:antialiased;margin:0;padding:0;font-family:-apple-system,BlinkMacSystemFont,Hiragino Kaku Gothic ProN,Noto Sans JP,Meiryo,sans-serif;line-height:1.7}.page{max-width:720px;margin:0 auto;padding:24px 16px 64px}.brandbar{background:var(--brand);color:#fff;letter-spacing:.02em;padding:14px 16px;font-size:16px;font-weight:700}.card{border:1px solid var(--line);background:#fff;border-radius:12px;margin-top:16px;padding:20px;box-shadow:0 1px 2px #0000000a}h1{margin:4px 0 12px;font-size:20px}h2{margin:0 0 8px;font-size:16px}.muted{color:var(--muted);font-size:13px}.doc{border:1px solid var(--line);border-radius:10px;margin-top:12px;overflow:hidden}.doc>summary{cursor:pointer;background:#fafafa;padding:12px 14px;font-weight:600;list-style:none}.doc[open]>summary{border-bottom:1px solid var(--line)}.doc-body{white-space:pre-wrap;word-break:break-word;max-height:320px;padding:14px;font-size:14px;overflow:auto}.btn{background:var(--brand);color:#fff;cursor:pointer;border:none;border-radius:10px;width:100%;margin-top:16px;padding:14px 16px;font-size:16px;font-weight:700;display:inline-block}.btn:disabled{cursor:not-allowed;background:#cbb3ae}.btn.secondary{color:var(--brand);border:1px solid var(--brand);background:#fff}.btn.btn-line{color:#fff;background:#06c755}.checkrow{align-items:flex-start;gap:10px;margin-top:16px;font-size:15px;display:flex}.checkrow input{margin-top:4px;transform:scale(1.3)}.field{margin-top:14px}.field label{color:var(--muted);margin-bottom:4px;font-size:13px;display:block}.field input{border:1px solid var(--line);border-radius:8px;width:100%;padding:11px 12px;font-size:15px}.banner{border-radius:10px;margin-top:12px;padding:12px 14px;font-size:14px}.banner.err{color:var(--err);background:#fdecea;border:1px solid #f5c6c2}.banner.ok{color:var(--ok);background:#e7f5ee;border:1px solid #b7e0c8}.step{color:var(--muted);text-transform:uppercase;letter-spacing:.08em;font-size:12px}