:root{--brand:#5b5bd6;--brand2:#22c8d8;--ink:#0f172a;--muted:#64748b;--line:#e2e8f0;--bg:#f8fafc}*{box-sizing:border-box}body{margin:0;font-family:Noto Sans JP,system-ui,sans-serif;color:var(--ink);background:var(--bg)}button,input,select,textarea{font-family:inherit}a{color:var(--brand)}.btn{background:var(--brand);color:#fff;border:0;border-radius:999px;padding:10px 18px;font-weight:700;cursor:pointer}.btn.secondary{color:var(--ink)}.btn.secondary,.card{background:#fff;border:1px solid var(--line)}.card{border-radius:14px}