\
    /* シンプルなスタイル */
    body{font-family: "Helvetica Neue", Arial, sans-serif;background:#f6f8fa;color:#222;}
    .wrap{max-width:900px;margin:20px auto;padding:20px;background:#fff;border-radius:8px;box-shadow:0 6px 20px rgba(0,0,0,0.06)}
    h1{margin-top:0}
    .info{display:flex;justify-content:space-between;align-items:center}
    .info .actions{display:flex;gap:8px;align-items:center}
    .add label{display:block;margin:8px 0}
    .list .plan{border:1px solid #eee;padding:10px;border-radius:6px;margin-bottom:8px}
    .plan-head{display:flex;justify-content:space-between;align-items:center}
    .plan-actions{margin-top:8px}
    button{cursor:pointer}