The provided CSS modifies Sendy forms, enhancing their aesthetic appearance and usability with the following modifications:

<style>

    body {

      font-family: 'Arial', sans-serif;

      background-color: #f4f4f4;

      margin: 0;

      padding: 0;

    }

    form {

      width: 50%;

      margin: auto;

    }

    label, input {

      display: block;

      width: 100%;

      margin-bottom: 10px;

    }

    input[type="text"],

    input[type="email"] {

      padding: 10px;

      box-sizing: border-box;

      border: 1px solid #ccc;

      border-radius: 4px;

    }

    input[type="submit"] {

      padding: 10px 20px;

      background-color: #28a745;

      color: #fff;

      border: none;

      border-radius: 4px;

      cursor: pointer;

    }

    input[type="submit"]:hover {

      background-color: #218838;

    }

  </style>{codeBox}