:root{--bg:#f2eee7;--ink:#22201c;--muted:#5e5a52;--accent:#276b5e;--card:#ffffff;--border:#e4ded4}*{box-sizing:border-box}body,html{margin:0;padding:0}body{background:var(--bg);color:var(--ink);font-family:Noto Sans JP,system-ui,-apple-system,sans-serif;line-height:1.6;-webkit-font-smoothing:antialiased}a{color:var(--accent)}.wrap{max-width:480px;margin:0 auto;padding:28px 24px 48px}.card{background:var(--card);border:1px solid var(--border);border-radius:20px;padding:24px}.btn{display:flex;align-items:center;justify-content:center;width:100%;min-height:52px;border:none;border-radius:14px;background:var(--accent);color:#fff;font-size:16px;font-weight:700;font-family:inherit;cursor:pointer}.btn:disabled{opacity:.5;cursor:default}.btn-line{background:#06c755}.field{display:flex;flex-direction:column;gap:8px}.field input{min-height:50px;border:1px solid var(--border);border-radius:12px;padding:0 14px;font-size:16px;font-family:inherit;background:#fff;color:var(--ink)}.muted{color:var(--muted);font-size:13px}.err{color:#b3261e;font-size:14px}.code{font-size:32px;font-weight:700;letter-spacing:.12em}